ETH Price: $2,631.42 (+7.32%)

Token

Super swETH (SUPER)
 

Overview

Max Total Supply

281.305585018735443727 SUPER

Holders

286 ( -0.350%)

Total Transfers

-

Market

Onchain Market Cap

$0.00

Circulating Supply Market Cap

-

Other Info

Token Contract (WITH 18 Decimals)

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OVERVIEW

swETH is a decentralized and non-custodial liquid staking token that provides users with the opportunity to earn staking rewards while retaining liquidity over their Ethereum holdings.

# Exchange Pair Price  24H Volume % Volume

Similar Match Source Code
This contract matches the deployed Bytecode of the Source Code for Contract 0x9D4Ed905...3a246e76d
The constructor portion of the code might be different and could alter the actual behaviour of the contract

Contract Name:
VaultProxy

Compiler Version
v0.6.12+commit.27d51765

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion, GNU GPLv3 license
File 1 of 138 : VaultProxy.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./utils/ProxiableVaultLib.sol";

/// @title VaultProxy Contract
/// @author Enzyme Council <[email protected]>
/// @notice A proxy contract for all VaultProxy instances, slightly modified from EIP-1822
/// @dev Adapted from the recommended implementation of a Proxy in EIP-1822, updated for solc 0.6.12,
/// and using the EIP-1967 storage slot for the proxiable implementation.
/// i.e., `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`, which is
/// "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
/// See: https://eips.ethereum.org/EIPS/eip-1822
contract VaultProxy {
    constructor(bytes memory _constructData, address _vaultLib) public {
        // "0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5" corresponds to
        // `bytes32(keccak256('mln.proxiable.vaultlib'))`
        require(
            bytes32(0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5) ==
                ProxiableVaultLib(_vaultLib).proxiableUUID(),
            "constructor: _vaultLib not compatible"
        );

        assembly {
            // solium-disable-line
            sstore(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc, _vaultLib)
        }

        (bool success, bytes memory returnData) = _vaultLib.delegatecall(_constructData); // solium-disable-line
        require(success, string(returnData));
    }

    fallback() external payable {
        assembly {
            // solium-disable-line
            let contractLogic := sload(
                0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc
            )
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(
                sub(gas(), 10000),
                contractLogic,
                0x0,
                calldatasize(),
                0,
                0
            )
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)
            switch success
                case 0 {
                    revert(0, retSz)
                }
                default {
                    return(0, retSz)
                }
        }
    }
}

File 2 of 138 : MockGenericAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../release/extensions/integration-manager/integrations/utils/AdapterBase.sol";

/// @title IMockGenericIntegratee Interface
/// @author Enzyme Council <[email protected]>
interface IMockGenericIntegratee {
    function swap(
        address[] calldata,
        uint256[] calldata,
        address[] calldata,
        uint256[] calldata
    ) external payable;

    function swapOnBehalf(
        address payable,
        address[] calldata,
        uint256[] calldata,
        address[] calldata,
        uint256[] calldata
    ) external payable;
}

/// @title MockGenericAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Provides a generic adapter that:
/// 1. Provides swapping functions that use various `SpendAssetsTransferType` values
/// 2. Directly parses the _actual_ values to swap from provided call data (e.g., `actualIncomingAssetAmounts`)
/// 3. Directly parses values needed by the IntegrationManager from provided call data (e.g., `minIncomingAssetAmounts`)
contract MockGenericAdapter is AdapterBase {
    address public immutable INTEGRATEE;

    // No need to specify the IntegrationManager
    constructor(address _integratee) public AdapterBase(address(0)) {
        INTEGRATEE = _integratee;
    }

    function identifier() external pure override returns (string memory) {
        return "MOCK_GENERIC";
    }

    function parseAssetsForMethod(bytes4 _selector, bytes calldata _callArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory maxSpendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        (
            spendAssets_,
            maxSpendAssetAmounts_,
            ,
            incomingAssets_,
            minIncomingAssetAmounts_,

        ) = __decodeCallArgs(_callArgs);

        return (
            __getSpendAssetsHandleTypeForSelector(_selector),
            spendAssets_,
            maxSpendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @dev Assumes SpendAssetsHandleType.Transfer unless otherwise specified
    function __getSpendAssetsHandleTypeForSelector(bytes4 _selector)
        private
        pure
        returns (IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_)
    {
        if (_selector == bytes4(keccak256("removeOnly(address,bytes,bytes)"))) {
            return IIntegrationManager.SpendAssetsHandleType.Remove;
        }
        if (_selector == bytes4(keccak256("swapDirectFromVault(address,bytes,bytes)"))) {
            return IIntegrationManager.SpendAssetsHandleType.None;
        }
        if (_selector == bytes4(keccak256("swapViaApproval(address,bytes,bytes)"))) {
            return IIntegrationManager.SpendAssetsHandleType.Approve;
        }
        return IIntegrationManager.SpendAssetsHandleType.Transfer;
    }

    function removeOnly(
        address,
        bytes calldata,
        bytes calldata
    ) external {}

    function swapA(
        address _vaultProxy,
        bytes calldata _callArgs,
        bytes calldata _assetTransferArgs
    ) external fundAssetsTransferHandler(_vaultProxy, _assetTransferArgs) {
        __decodeCallArgsAndSwap(_callArgs);
    }

    function swapB(
        address _vaultProxy,
        bytes calldata _callArgs,
        bytes calldata _assetTransferArgs
    ) external fundAssetsTransferHandler(_vaultProxy, _assetTransferArgs) {
        __decodeCallArgsAndSwap(_callArgs);
    }

    function swapDirectFromVault(
        address _vaultProxy,
        bytes calldata _callArgs,
        bytes calldata
    ) external {
        (
            address[] memory spendAssets,
            ,
            uint256[] memory actualSpendAssetAmounts,
            address[] memory incomingAssets,
            ,
            uint256[] memory actualIncomingAssetAmounts
        ) = __decodeCallArgs(_callArgs);

        IMockGenericIntegratee(INTEGRATEE).swapOnBehalf(
            payable(_vaultProxy),
            spendAssets,
            actualSpendAssetAmounts,
            incomingAssets,
            actualIncomingAssetAmounts
        );
    }

    function swapViaApproval(
        address _vaultProxy,
        bytes calldata _callArgs,
        bytes calldata _assetTransferArgs
    ) external fundAssetsTransferHandler(_vaultProxy, _assetTransferArgs) {
        __decodeCallArgsAndSwap(_callArgs);
    }

    function __decodeCallArgs(bytes memory _callArgs)
        internal
        pure
        returns (
            address[] memory spendAssets_,
            uint256[] memory maxSpendAssetAmounts_,
            uint256[] memory actualSpendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_,
            uint256[] memory actualIncomingAssetAmounts_
        )
    {
        return
            abi.decode(
                _callArgs,
                (address[], uint256[], uint256[], address[], uint256[], uint256[])
            );
    }

    function __decodeCallArgsAndSwap(bytes memory _callArgs) internal {
        (
            address[] memory spendAssets,
            ,
            uint256[] memory actualSpendAssetAmounts,
            address[] memory incomingAssets,
            ,
            uint256[] memory actualIncomingAssetAmounts
        ) = __decodeCallArgs(_callArgs);

        for (uint256 i; i < spendAssets.length; i++) {
            ERC20(spendAssets[i]).approve(INTEGRATEE, actualSpendAssetAmounts[i]);
        }
        IMockGenericIntegratee(INTEGRATEE).swap(
            spendAssets,
            actualSpendAssetAmounts,
            incomingAssets,
            actualIncomingAssetAmounts
        );
    }
}

File 3 of 138 : ERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../../GSN/Context.sol";
import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @dev Implementation of the {IERC20} interface.
 *
 * This implementation is agnostic to the way tokens are created. This means
 * that a supply mechanism has to be added in a derived contract using {_mint}.
 * For a generic mechanism see {ERC20PresetMinterPauser}.
 *
 * TIP: For a detailed writeup see our guide
 * https://forum.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How
 * to implement supply mechanisms].
 *
 * We have followed general OpenZeppelin guidelines: functions revert instead
 * of returning `false` on failure. This behavior is nonetheless conventional
 * and does not conflict with the expectations of ERC20 applications.
 *
 * Additionally, an {Approval} event is emitted on calls to {transferFrom}.
 * This allows applications to reconstruct the allowance for all accounts just
 * by listening to said events. Other implementations of the EIP may not emit
 * these events, as it isn't required by the specification.
 *
 * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
 * functions have been added to mitigate the well-known issues around setting
 * allowances. See {IERC20-approve}.
 */
contract ERC20 is Context, IERC20 {
    using SafeMath for uint256;
    using Address for address;

    mapping (address => uint256) private _balances;

    mapping (address => mapping (address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;
    uint8 private _decimals;

    /**
     * @dev Sets the values for {name} and {symbol}, initializes {decimals} with
     * a default value of 18.
     *
     * To select a different value for {decimals}, use {_setupDecimals}.
     *
     * All three of these values are immutable: they can only be set once during
     * construction.
     */
    constructor (string memory name, string memory symbol) public {
        _name = name;
        _symbol = symbol;
        _decimals = 18;
    }

    /**
     * @dev Returns the name of the token.
     */
    function name() public view returns (string memory) {
        return _name;
    }

    /**
     * @dev Returns the symbol of the token, usually a shorter version of the
     * name.
     */
    function symbol() public view returns (string memory) {
        return _symbol;
    }

    /**
     * @dev Returns the number of decimals used to get its user representation.
     * For example, if `decimals` equals `2`, a balance of `505` tokens should
     * be displayed to a user as `5,05` (`505 / 10 ** 2`).
     *
     * Tokens usually opt for a value of 18, imitating the relationship between
     * Ether and Wei. This is the value {ERC20} uses, unless {_setupDecimals} is
     * called.
     *
     * NOTE: This information is only used for _display_ purposes: it in
     * no way affects any of the arithmetic of the contract, including
     * {IERC20-balanceOf} and {IERC20-transfer}.
     */
    function decimals() public view returns (uint8) {
        return _decimals;
    }

    /**
     * @dev See {IERC20-totalSupply}.
     */
    function totalSupply() public view override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @dev See {IERC20-balanceOf}.
     */
    function balanceOf(address account) public view override returns (uint256) {
        return _balances[account];
    }

    /**
     * @dev See {IERC20-transfer}.
     *
     * Requirements:
     *
     * - `recipient` cannot be the zero address.
     * - the caller must have a balance of at least `amount`.
     */
    function transfer(address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev See {IERC20-allowance}.
     */
    function allowance(address owner, address spender) public view virtual override returns (uint256) {
        return _allowances[owner][spender];
    }

    /**
     * @dev See {IERC20-approve}.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev See {IERC20-transferFrom}.
     *
     * Emits an {Approval} event indicating the updated allowance. This is not
     * required by the EIP. See the note at the beginning of {ERC20};
     *
     * Requirements:
     * - `sender` and `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     * - the caller must have allowance for ``sender``'s tokens of at least
     * `amount`.
     */
    function transferFrom(address sender, address recipient, uint256 amount) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
        return true;
    }

    /**
     * @dev Atomically increases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     */
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
        return true;
    }

    /**
     * @dev Atomically decreases the allowance granted to `spender` by the caller.
     *
     * This is an alternative to {approve} that can be used as a mitigation for
     * problems described in {IERC20-approve}.
     *
     * Emits an {Approval} event indicating the updated allowance.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `spender` must have allowance for the caller of at least
     * `subtractedValue`.
     */
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        _approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
        return true;
    }

    /**
     * @dev Moves tokens `amount` from `sender` to `recipient`.
     *
     * This is internal function is equivalent to {transfer}, and can be used to
     * e.g. implement automatic token fees, slashing mechanisms, etc.
     *
     * Emits a {Transfer} event.
     *
     * Requirements:
     *
     * - `sender` cannot be the zero address.
     * - `recipient` cannot be the zero address.
     * - `sender` must have a balance of at least `amount`.
     */
    function _transfer(address sender, address recipient, uint256 amount) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        _balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
        _balances[recipient] = _balances[recipient].add(amount);
        emit Transfer(sender, recipient, amount);
    }

    /** @dev Creates `amount` tokens and assigns them to `account`, increasing
     * the total supply.
     *
     * Emits a {Transfer} event with `from` set to the zero address.
     *
     * Requirements
     *
     * - `to` cannot be the zero address.
     */
    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply = _totalSupply.add(amount);
        _balances[account] = _balances[account].add(amount);
        emit Transfer(address(0), account, amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, reducing the
     * total supply.
     *
     * Emits a {Transfer} event with `to` set to the zero address.
     *
     * Requirements
     *
     * - `account` cannot be the zero address.
     * - `account` must have at least `amount` tokens.
     */
    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        _balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
        _totalSupply = _totalSupply.sub(amount);
        emit Transfer(account, address(0), amount);
    }

    /**
     * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
     *
     * This internal function is equivalent to `approve`, and can be used to
     * e.g. set automatic allowances for certain subsystems, etc.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `owner` cannot be the zero address.
     * - `spender` cannot be the zero address.
     */
    function _approve(address owner, address spender, uint256 amount) internal virtual {
        require(owner != address(0), "ERC20: approve from the zero address");
        require(spender != address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    /**
     * @dev Sets {decimals} to a value other than the default one of 18.
     *
     * WARNING: This function should only be called from the constructor. Most
     * applications that interact with token contracts will not expect
     * {decimals} to ever change, and may work incorrectly if it does.
     */
    function _setupDecimals(uint8 decimals_) internal {
        _decimals = decimals_;
    }

    /**
     * @dev Hook that is called before any transfer of tokens. This includes
     * minting and burning.
     *
     * Calling conditions:
     *
     * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
     * will be to transferred to `to`.
     * - when `from` is zero, `amount` tokens will be minted for `to`.
     * - when `to` is zero, `amount` of ``from``'s tokens will be burned.
     * - `from` and `to` are never both zero.
     *
     * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
     */
    function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual { }
}

File 4 of 138 : AdapterBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../IIntegrationAdapter.sol";
import "./IntegrationSelectors.sol";

/// @title AdapterBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice A base contract for integration adapters
abstract contract AdapterBase is IIntegrationAdapter, IntegrationSelectors {
    using SafeERC20 for ERC20;

    address internal immutable INTEGRATION_MANAGER;

    /// @dev Provides a standard implementation for transferring assets between
    /// the fund's VaultProxy and the adapter, by wrapping the adapter action.
    /// This modifier should be implemented in almost all adapter actions, unless they
    /// do not move assets or can spend and receive assets directly with the VaultProxy
    modifier fundAssetsTransferHandler(
        address _vaultProxy,
        bytes memory _encodedAssetTransferArgs
    ) {
        (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType,
            address[] memory spendAssets,
            uint256[] memory spendAssetAmounts,
            address[] memory incomingAssets
        ) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);

        // Take custody of spend assets (if necessary)
        if (spendAssetsHandleType == IIntegrationManager.SpendAssetsHandleType.Approve) {
            for (uint256 i = 0; i < spendAssets.length; i++) {
                ERC20(spendAssets[i]).safeTransferFrom(
                    _vaultProxy,
                    address(this),
                    spendAssetAmounts[i]
                );
            }
        }

        // Execute call
        _;

        // Transfer remaining assets back to the fund's VaultProxy
        __transferContractAssetBalancesToFund(_vaultProxy, incomingAssets);
        __transferContractAssetBalancesToFund(_vaultProxy, spendAssets);
    }

    modifier onlyIntegrationManager {
        require(
            msg.sender == INTEGRATION_MANAGER,
            "Only the IntegrationManager can call this function"
        );
        _;
    }

    constructor(address _integrationManager) public {
        INTEGRATION_MANAGER = _integrationManager;
    }

    // INTERNAL FUNCTIONS

    /// @dev Helper for adapters to approve their integratees with the max amount of an asset.
    /// Since everything is done atomically, and only the balances to-be-used are sent to adapters,
    /// there is no need to approve exact amounts on every call.
    function __approveMaxAsNeeded(
        address _asset,
        address _target,
        uint256 _neededAmount
    ) internal {
        if (ERC20(_asset).allowance(address(this), _target) < _neededAmount) {
            ERC20(_asset).approve(_target, type(uint256).max);
        }
    }

    /// @dev Helper to decode the _encodedAssetTransferArgs param passed to adapter call
    function __decodeEncodedAssetTransferArgs(bytes memory _encodedAssetTransferArgs)
        internal
        pure
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_
        )
    {
        return
            abi.decode(
                _encodedAssetTransferArgs,
                (IIntegrationManager.SpendAssetsHandleType, address[], uint256[], address[])
            );
    }

    /// @dev Helper to transfer full contract balances of assets to the specified VaultProxy
    function __transferContractAssetBalancesToFund(address _vaultProxy, address[] memory _assets)
        private
    {
        for (uint256 i = 0; i < _assets.length; i++) {
            uint256 postCallAmount = ERC20(_assets[i]).balanceOf(address(this));
            if (postCallAmount > 0) {
                ERC20(_assets[i]).safeTransfer(_vaultProxy, postCallAmount);
            }
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `INTEGRATION_MANAGER` variable
    /// @return integrationManager_ The `INTEGRATION_MANAGER` variable value
    function getIntegrationManager() external view returns (address integrationManager_) {
        return INTEGRATION_MANAGER;
    }
}

File 5 of 138 : Context.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

File 6 of 138 : IERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender) external view returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(address indexed owner, address indexed spender, uint256 value);
}

File 7 of 138 : SafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

File 8 of 138 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.2;

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies in extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly { size := extcodesize(account) }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{ value: amount }("");
        require(success, "Address: unable to send value, recipient may have reverted");
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data) internal returns (bytes memory) {
      return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) {
        return _functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
        return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) {
        require(address(this).balance >= value, "Address: insufficient balance for call");
        return _functionCallWithValue(target, data, value, errorMessage);
    }

    function _functionCallWithValue(address target, bytes memory data, uint256 weiValue, string memory errorMessage) private returns (bytes memory) {
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{ value: weiValue }(data);
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 9 of 138 : SafeERC20.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "./IERC20.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(IERC20 token, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
    }

    function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
        _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(IERC20 token, address spender, uint256 value) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require((value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
    }

    function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(value);
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(value, "SafeERC20: decreased allowance below zero");
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
        if (returndata.length > 0) { // Return data is optional
            // solhint-disable-next-line max-line-length
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 10 of 138 : IIntegrationAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../IIntegrationManager.sol";

/// @title Integration Adapter interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all integration adapters
interface IIntegrationAdapter {
    function identifier() external pure returns (string memory identifier_);

    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        );
}

File 11 of 138 : IntegrationSelectors.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IntegrationSelectors Contract
/// @author Enzyme Council <[email protected]>
/// @notice Selectors for integration actions
/// @dev Selectors are created from their signatures rather than hardcoded for easy verification
abstract contract IntegrationSelectors {
    bytes4 public constant ADD_TRACKED_ASSETS_SELECTOR = bytes4(
        keccak256("addTrackedAssets(address,bytes,bytes)")
    );

    // Trading
    bytes4 public constant TAKE_ORDER_SELECTOR = bytes4(
        keccak256("takeOrder(address,bytes,bytes)")
    );

    // Lending
    bytes4 public constant LEND_SELECTOR = bytes4(keccak256("lend(address,bytes,bytes)"));
    bytes4 public constant REDEEM_SELECTOR = bytes4(keccak256("redeem(address,bytes,bytes)"));
}

File 12 of 138 : IIntegrationManager.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IIntegrationManager interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the IntegrationManager
interface IIntegrationManager {
    enum SpendAssetsHandleType {None, Approve, Transfer, Remove}
}

File 13 of 138 : ZeroExV2Adapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IZeroExV2.sol";
import "../../../../utils/MathHelpers.sol";
import "../../../../utils/AddressArrayLib.sol";
import "../../../utils/FundDeployerOwnerMixin.sol";
import "../utils/AdapterBase.sol";

/// @title ZeroExV2Adapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter to 0xV2 Exchange Contract
contract ZeroExV2Adapter is AdapterBase, FundDeployerOwnerMixin, MathHelpers {
    using AddressArrayLib for address[];
    using SafeMath for uint256;

    event AllowedMakerAdded(address indexed account);

    event AllowedMakerRemoved(address indexed account);

    address private immutable EXCHANGE;
    mapping(address => bool) private makerToIsAllowed;

    // Gas could be optimized for the end-user by also storing an immutable ZRX_ASSET_DATA,
    // for example, but in the narrow OTC use-case of this adapter, taker fees are unlikely.
    constructor(
        address _integrationManager,
        address _exchange,
        address _fundDeployer,
        address[] memory _allowedMakers
    ) public AdapterBase(_integrationManager) FundDeployerOwnerMixin(_fundDeployer) {
        EXCHANGE = _exchange;
        if (_allowedMakers.length > 0) {
            __addAllowedMakers(_allowedMakers);
        }
    }

    // EXTERNAL FUNCTIONS

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "ZERO_EX_V2";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");

        (
            bytes memory encodedZeroExOrderArgs,
            uint256 takerAssetFillAmount
        ) = __decodeTakeOrderCallArgs(_encodedCallArgs);
        IZeroExV2.Order memory order = __constructOrderStruct(encodedZeroExOrderArgs);

        require(
            isAllowedMaker(order.makerAddress),
            "parseAssetsForMethod: Order maker is not allowed"
        );
        require(
            takerAssetFillAmount <= order.takerAssetAmount,
            "parseAssetsForMethod: Taker asset fill amount greater than available"
        );

        address makerAsset = __getAssetAddress(order.makerAssetData);
        address takerAsset = __getAssetAddress(order.takerAssetData);

        // Format incoming assets
        incomingAssets_ = new address[](1);
        incomingAssets_[0] = makerAsset;
        minIncomingAssetAmounts_ = new uint256[](1);
        minIncomingAssetAmounts_[0] = __calcRelativeQuantity(
            order.takerAssetAmount,
            order.makerAssetAmount,
            takerAssetFillAmount
        );

        if (order.takerFee > 0) {
            address takerFeeAsset = __getAssetAddress(IZeroExV2(EXCHANGE).ZRX_ASSET_DATA());
            uint256 takerFeeFillAmount = __calcRelativeQuantity(
                order.takerAssetAmount,
                order.takerFee,
                takerAssetFillAmount
            ); // fee calculated relative to taker fill amount

            if (takerFeeAsset == makerAsset) {
                require(
                    order.takerFee < order.makerAssetAmount,
                    "parseAssetsForMethod: Fee greater than makerAssetAmount"
                );

                spendAssets_ = new address[](1);
                spendAssets_[0] = takerAsset;

                spendAssetAmounts_ = new uint256[](1);
                spendAssetAmounts_[0] = takerAssetFillAmount;

                minIncomingAssetAmounts_[0] = minIncomingAssetAmounts_[0].sub(takerFeeFillAmount);
            } else if (takerFeeAsset == takerAsset) {
                spendAssets_ = new address[](1);
                spendAssets_[0] = takerAsset;

                spendAssetAmounts_ = new uint256[](1);
                spendAssetAmounts_[0] = takerAssetFillAmount.add(takerFeeFillAmount);
            } else {
                spendAssets_ = new address[](2);
                spendAssets_[0] = takerAsset;
                spendAssets_[1] = takerFeeAsset;

                spendAssetAmounts_ = new uint256[](2);
                spendAssetAmounts_[0] = takerAssetFillAmount;
                spendAssetAmounts_[1] = takerFeeFillAmount;
            }
        } else {
            spendAssets_ = new address[](1);
            spendAssets_[0] = takerAsset;

            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = takerAssetFillAmount;
        }

        return (
            IIntegrationManager.SpendAssetsHandleType.Transfer,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @notice Take an order on 0x
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function takeOrder(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        (
            bytes memory encodedZeroExOrderArgs,
            uint256 takerAssetFillAmount
        ) = __decodeTakeOrderCallArgs(_encodedCallArgs);
        IZeroExV2.Order memory order = __constructOrderStruct(encodedZeroExOrderArgs);

        // Approve spend assets as needed
        __approveMaxAsNeeded(
            __getAssetAddress(order.takerAssetData),
            __getAssetProxy(order.takerAssetData),
            takerAssetFillAmount
        );
        // Ignores whether makerAsset or takerAsset overlap with the takerFee asset for simplicity
        if (order.takerFee > 0) {
            bytes memory zrxData = IZeroExV2(EXCHANGE).ZRX_ASSET_DATA();
            __approveMaxAsNeeded(
                __getAssetAddress(zrxData),
                __getAssetProxy(zrxData),
                __calcRelativeQuantity(
                    order.takerAssetAmount,
                    order.takerFee,
                    takerAssetFillAmount
                ) // fee calculated relative to taker fill amount
            );
        }

        // Execute order
        (, , , bytes memory signature) = __decodeZeroExOrderArgs(encodedZeroExOrderArgs);
        IZeroExV2(EXCHANGE).fillOrder(order, takerAssetFillAmount, signature);
    }

    // PRIVATE FUNCTIONS

    /// @dev Parses user inputs into a ZeroExV2.Order format
    function __constructOrderStruct(bytes memory _encodedOrderArgs)
        private
        pure
        returns (IZeroExV2.Order memory order_)
    {
        (
            address[4] memory orderAddresses,
            uint256[6] memory orderValues,
            bytes[2] memory orderData,

        ) = __decodeZeroExOrderArgs(_encodedOrderArgs);

        return
            IZeroExV2.Order({
                makerAddress: orderAddresses[0],
                takerAddress: orderAddresses[1],
                feeRecipientAddress: orderAddresses[2],
                senderAddress: orderAddresses[3],
                makerAssetAmount: orderValues[0],
                takerAssetAmount: orderValues[1],
                makerFee: orderValues[2],
                takerFee: orderValues[3],
                expirationTimeSeconds: orderValues[4],
                salt: orderValues[5],
                makerAssetData: orderData[0],
                takerAssetData: orderData[1]
            });
    }

    /// @dev Decode the parameters of a takeOrder call
    /// @param _encodedCallArgs Encoded parameters passed from client side
    /// @return encodedZeroExOrderArgs_ Encoded args of the 0x order
    /// @return takerAssetFillAmount_ Amount of taker asset to fill
    function __decodeTakeOrderCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (bytes memory encodedZeroExOrderArgs_, uint256 takerAssetFillAmount_)
    {
        return abi.decode(_encodedCallArgs, (bytes, uint256));
    }

    /// @dev Decode the parameters of a 0x order
    /// @param _encodedZeroExOrderArgs Encoded parameters of the 0x order
    /// @return orderAddresses_ Addresses used in the order
    /// - [0] 0x Order param: makerAddress
    /// - [1] 0x Order param: takerAddress
    /// - [2] 0x Order param: feeRecipientAddress
    /// - [3] 0x Order param: senderAddress
    /// @return orderValues_ Values used in the order
    /// - [0] 0x Order param: makerAssetAmount
    /// - [1] 0x Order param: takerAssetAmount
    /// - [2] 0x Order param: makerFee
    /// - [3] 0x Order param: takerFee
    /// - [4] 0x Order param: expirationTimeSeconds
    /// - [5] 0x Order param: salt
    /// @return orderData_ Bytes data used in the order
    /// - [0] 0x Order param: makerAssetData
    /// - [1] 0x Order param: takerAssetData
    /// @return signature_ Signature of the order
    function __decodeZeroExOrderArgs(bytes memory _encodedZeroExOrderArgs)
        private
        pure
        returns (
            address[4] memory orderAddresses_,
            uint256[6] memory orderValues_,
            bytes[2] memory orderData_,
            bytes memory signature_
        )
    {
        return abi.decode(_encodedZeroExOrderArgs, (address[4], uint256[6], bytes[2], bytes));
    }

    /// @dev Parses the asset address from 0x assetData
    function __getAssetAddress(bytes memory _assetData)
        private
        pure
        returns (address assetAddress_)
    {
        assembly {
            assetAddress_ := mload(add(_assetData, 36))
        }
    }

    /// @dev Gets the 0x assetProxy address for an ERC20 token
    function __getAssetProxy(bytes memory _assetData) private view returns (address assetProxy_) {
        bytes4 assetProxyId;

        assembly {
            assetProxyId := and(
                mload(add(_assetData, 32)),
                0xFFFFFFFF00000000000000000000000000000000000000000000000000000000
            )
        }
        assetProxy_ = IZeroExV2(EXCHANGE).getAssetProxy(assetProxyId);
    }

    /////////////////////////////
    // ALLOWED MAKERS REGISTRY //
    /////////////////////////////

    /// @notice Adds accounts to the list of allowed 0x order makers
    /// @param _accountsToAdd Accounts to add
    function addAllowedMakers(address[] calldata _accountsToAdd) external onlyFundDeployerOwner {
        __addAllowedMakers(_accountsToAdd);
    }

    /// @notice Removes accounts from the list of allowed 0x order makers
    /// @param _accountsToRemove Accounts to remove
    function removeAllowedMakers(address[] calldata _accountsToRemove)
        external
        onlyFundDeployerOwner
    {
        require(_accountsToRemove.length > 0, "removeAllowedMakers: Empty _accountsToRemove");

        for (uint256 i; i < _accountsToRemove.length; i++) {
            require(
                isAllowedMaker(_accountsToRemove[i]),
                "removeAllowedMakers: Account is not an allowed maker"
            );

            makerToIsAllowed[_accountsToRemove[i]] = false;

            emit AllowedMakerRemoved(_accountsToRemove[i]);
        }
    }

    /// @dev Helper to add accounts to the list of allowed makers
    function __addAllowedMakers(address[] memory _accountsToAdd) private {
        require(_accountsToAdd.length > 0, "__addAllowedMakers: Empty _accountsToAdd");

        for (uint256 i; i < _accountsToAdd.length; i++) {
            require(!isAllowedMaker(_accountsToAdd[i]), "__addAllowedMakers: Value already set");

            makerToIsAllowed[_accountsToAdd[i]] = true;

            emit AllowedMakerAdded(_accountsToAdd[i]);
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `EXCHANGE` variable value
    /// @return exchange_ The `EXCHANGE` variable value
    function getExchange() external view returns (address exchange_) {
        return EXCHANGE;
    }

    /// @notice Checks whether an account is an allowed maker of 0x orders
    /// @param _who The account to check
    /// @return isAllowedMaker_ True if _who is an allowed maker
    function isAllowedMaker(address _who) public view returns (bool isAllowedMaker_) {
        return makerToIsAllowed[_who];
    }
}

File 14 of 138 : IZeroExV2.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

/// @dev Minimal interface for our interactions with the ZeroEx Exchange contract
interface IZeroExV2 {
    struct Order {
        address makerAddress;
        address takerAddress;
        address feeRecipientAddress;
        address senderAddress;
        uint256 makerAssetAmount;
        uint256 takerAssetAmount;
        uint256 makerFee;
        uint256 takerFee;
        uint256 expirationTimeSeconds;
        uint256 salt;
        bytes makerAssetData;
        bytes takerAssetData;
    }

    struct OrderInfo {
        uint8 orderStatus;
        bytes32 orderHash;
        uint256 orderTakerAssetFilledAmount;
    }

    struct FillResults {
        uint256 makerAssetFilledAmount;
        uint256 takerAssetFilledAmount;
        uint256 makerFeePaid;
        uint256 takerFeePaid;
    }

    function ZRX_ASSET_DATA() external view returns (bytes memory);

    function filled(bytes32) external view returns (uint256);

    function cancelled(bytes32) external view returns (bool);

    function getOrderInfo(Order calldata) external view returns (OrderInfo memory);

    function getAssetProxy(bytes4) external view returns (address);

    function isValidSignature(
        bytes32,
        address,
        bytes calldata
    ) external view returns (bool);

    function preSign(
        bytes32,
        address,
        bytes calldata
    ) external;

    function cancelOrder(Order calldata) external;

    function fillOrder(
        Order calldata,
        uint256,
        bytes calldata
    ) external returns (FillResults memory);
}

File 15 of 138 : MathHelpers.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";

/// @title MathHelpers Contract
/// @author Enzyme Council <[email protected]>
/// @notice Helper functions for common math operations
abstract contract MathHelpers {
    using SafeMath for uint256;

    /// @dev Calculates a proportional value relative to a known ratio
    function __calcRelativeQuantity(
        uint256 _quantity1,
        uint256 _quantity2,
        uint256 _relativeQuantity1
    ) internal pure returns (uint256 relativeQuantity2_) {
        return _relativeQuantity1.mul(_quantity2).div(_quantity1);
    }

    /// @dev Calculates a rate normalized to 10^18 precision,
    /// for given base and quote asset decimals and amounts
    function __calcNormalizedRate(
        uint256 _baseAssetDecimals,
        uint256 _baseAssetAmount,
        uint256 _quoteAssetDecimals,
        uint256 _quoteAssetAmount
    ) internal pure returns (uint256 normalizedRate_) {
        return
            _quoteAssetAmount.mul(10**_baseAssetDecimals.add(18)).div(
                _baseAssetAmount.mul(10**_quoteAssetDecimals)
            );
    }
}

File 16 of 138 : AddressArrayLib.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title AddressArray Library
/// @author Enzyme Council <[email protected]>
/// @notice A library to extend the address array data type
library AddressArrayLib {
    /// @dev Helper to verify if an array contains a particular value
    function contains(address[] memory _self, address _target)
        internal
        pure
        returns (bool doesContain_)
    {
        for (uint256 i; i < _self.length; i++) {
            if (_target == _self[i]) {
                return true;
            }
        }
        return false;
    }

    /// @dev Helper to verify if array is a set of unique values.
    /// Does not assert length > 0.
    function isUniqueSet(address[] memory _self) internal pure returns (bool isUnique_) {
        if (_self.length <= 1) {
            return true;
        }

        uint256 arrayLength = _self.length;
        for (uint256 i; i < arrayLength; i++) {
            for (uint256 j = i + 1; j < arrayLength; j++) {
                if (_self[i] == _self[j]) {
                    return false;
                }
            }
        }

        return true;
    }

    /// @dev Helper to remove items from an array. Removes all matching occurrences of each item.
    /// Does not assert uniqueness of either array.
    function removeItems(address[] memory _self, address[] memory _itemsToRemove)
        internal
        pure
        returns (address[] memory nextArray_)
    {
        if (_itemsToRemove.length == 0) {
            return _self;
        }

        bool[] memory indexesToRemove = new bool[](_self.length);
        uint256 remainingItemsCount = _self.length;
        for (uint256 i; i < _self.length; i++) {
            if (contains(_itemsToRemove, _self[i])) {
                indexesToRemove[i] = true;
                remainingItemsCount--;
            }
        }

        if (remainingItemsCount == _self.length) {
            nextArray_ = _self;
        } else if (remainingItemsCount > 0) {
            nextArray_ = new address[](remainingItemsCount);
            uint256 nextArrayIndex;
            for (uint256 i; i < _self.length; i++) {
                if (!indexesToRemove[i]) {
                    nextArray_[nextArrayIndex] = _self[i];
                    nextArrayIndex++;
                }
            }
        }

        return nextArray_;
    }
}

File 17 of 138 : FundDeployerOwnerMixin.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../core/fund-deployer/IFundDeployer.sol";

/// @title FundDeployerOwnerMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract that defers ownership to the owner of FundDeployer
abstract contract FundDeployerOwnerMixin {
    address internal immutable FUND_DEPLOYER;

    modifier onlyFundDeployerOwner() {
        require(
            msg.sender == getOwner(),
            "onlyFundDeployerOwner: Only the FundDeployer owner can call this function"
        );
        _;
    }

    constructor(address _fundDeployer) public {
        FUND_DEPLOYER = _fundDeployer;
    }

    /// @notice Gets the owner of this contract
    /// @return owner_ The owner
    /// @dev Ownership is deferred to the owner of the FundDeployer contract
    function getOwner() public view returns (address owner_) {
        return IFundDeployer(FUND_DEPLOYER).getOwner();
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `FUND_DEPLOYER` variable
    /// @return fundDeployer_ The `FUND_DEPLOYER` variable value
    function getFundDeployer() external view returns (address fundDeployer_) {
        return FUND_DEPLOYER;
    }
}

File 18 of 138 : IFundDeployer.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IFundDeployer Interface
/// @author Enzyme Council <[email protected]>
interface IFundDeployer {
    enum ReleaseStatus {PreLaunch, Live, Paused}

    function getOwner() external view returns (address);

    function getReleaseStatus() external view returns (ReleaseStatus);

    function isRegisteredVaultCall(address, bytes4) external view returns (bool);
}

File 19 of 138 : PolicyManager.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "../../core/fund/vault/IVault.sol";
import "../utils/ExtensionBase.sol";
import "../utils/FundDeployerOwnerMixin.sol";
import "./IPolicy.sol";
import "./IPolicyManager.sol";

/// @title PolicyManager Contract
/// @author Enzyme Council <[email protected]>
/// @notice Manages policies for funds
contract PolicyManager is IPolicyManager, ExtensionBase, FundDeployerOwnerMixin {
    using EnumerableSet for EnumerableSet.AddressSet;

    event PolicyDeregistered(address indexed policy, string indexed identifier);

    event PolicyDisabledForFund(address indexed comptrollerProxy, address indexed policy);

    event PolicyEnabledForFund(
        address indexed comptrollerProxy,
        address indexed policy,
        bytes settingsData
    );

    event PolicyRegistered(
        address indexed policy,
        string indexed identifier,
        PolicyHook[] implementedHooks
    );

    EnumerableSet.AddressSet private registeredPolicies;
    mapping(address => mapping(PolicyHook => bool)) private policyToHookToIsImplemented;
    mapping(address => EnumerableSet.AddressSet) private comptrollerProxyToPolicies;

    modifier onlyBuySharesHooks(address _policy) {
        require(
            !policyImplementsHook(_policy, PolicyHook.PreCallOnIntegration) &&
                !policyImplementsHook(_policy, PolicyHook.PostCallOnIntegration),
            "onlyBuySharesHooks: Disallowed hook"
        );
        _;
    }

    modifier onlyEnabledPolicyForFund(address _comptrollerProxy, address _policy) {
        require(
            policyIsEnabledForFund(_comptrollerProxy, _policy),
            "onlyEnabledPolicyForFund: Policy not enabled"
        );
        _;
    }

    constructor(address _fundDeployer) public FundDeployerOwnerMixin(_fundDeployer) {}

    // EXTERNAL FUNCTIONS

    /// @notice Validates and initializes policies as necessary prior to fund activation
    /// @param _isMigratedFund True if the fund is migrating to this release
    /// @dev Caller is expected to be a valid ComptrollerProxy, but there isn't a need to validate.
    function activateForFund(bool _isMigratedFund) external override {
        address vaultProxy = __setValidatedVaultProxy(msg.sender);

        // Policies must assert that they are congruent with migrated vault state
        if (_isMigratedFund) {
            address[] memory enabledPolicies = getEnabledPoliciesForFund(msg.sender);
            for (uint256 i; i < enabledPolicies.length; i++) {
                __activatePolicyForFund(msg.sender, vaultProxy, enabledPolicies[i]);
            }
        }
    }

    /// @notice Deactivates policies for a fund by destroying storage
    function deactivateForFund() external override {
        delete comptrollerProxyToVaultProxy[msg.sender];

        for (uint256 i = comptrollerProxyToPolicies[msg.sender].length(); i > 0; i--) {
            comptrollerProxyToPolicies[msg.sender].remove(
                comptrollerProxyToPolicies[msg.sender].at(i - 1)
            );
        }
    }

    /// @notice Disables a policy for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _policy The policy address to disable
    function disablePolicyForFund(address _comptrollerProxy, address _policy)
        external
        onlyBuySharesHooks(_policy)
        onlyEnabledPolicyForFund(_comptrollerProxy, _policy)
    {
        __validateIsFundOwner(getVaultProxyForFund(_comptrollerProxy), msg.sender);

        comptrollerProxyToPolicies[_comptrollerProxy].remove(_policy);

        emit PolicyDisabledForFund(_comptrollerProxy, _policy);
    }

    /// @notice Enables a policy for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _policy The policy address to enable
    /// @param _settingsData The encoded settings data with which to configure the policy
    /// @dev Disabling a policy does not delete fund config on the policy, so if a policy is
    /// disabled and then enabled again, its initial state will be the previous config. It is the
    /// policy's job to determine how to merge that config with the _settingsData param in this function.
    function enablePolicyForFund(
        address _comptrollerProxy,
        address _policy,
        bytes calldata _settingsData
    ) external onlyBuySharesHooks(_policy) {
        address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
        __validateIsFundOwner(vaultProxy, msg.sender);

        __enablePolicyForFund(_comptrollerProxy, _policy, _settingsData);

        __activatePolicyForFund(_comptrollerProxy, vaultProxy, _policy);
    }

    /// @notice Enable policies for use in a fund
    /// @param _configData Encoded config data
    /// @dev Only called during init() on ComptrollerProxy deployment
    function setConfigForFund(bytes calldata _configData) external override {
        (address[] memory policies, bytes[] memory settingsData) = abi.decode(
            _configData,
            (address[], bytes[])
        );

        // Sanity check
        require(
            policies.length == settingsData.length,
            "setConfigForFund: policies and settingsData array lengths unequal"
        );

        // Enable each policy with settings
        for (uint256 i; i < policies.length; i++) {
            __enablePolicyForFund(msg.sender, policies[i], settingsData[i]);
        }
    }

    /// @notice Updates policy settings for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _policy The Policy contract to update
    /// @param _settingsData The encoded settings data with which to update the policy config
    function updatePolicySettingsForFund(
        address _comptrollerProxy,
        address _policy,
        bytes calldata _settingsData
    ) external onlyBuySharesHooks(_policy) onlyEnabledPolicyForFund(_comptrollerProxy, _policy) {
        address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
        __validateIsFundOwner(vaultProxy, msg.sender);

        IPolicy(_policy).updateFundSettings(_comptrollerProxy, vaultProxy, _settingsData);
    }

    /// @notice Validates all policies that apply to a given hook for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _hook The PolicyHook for which to validate policies
    /// @param _validationData The encoded data with which to validate the filtered policies
    function validatePolicies(
        address _comptrollerProxy,
        PolicyHook _hook,
        bytes calldata _validationData
    ) external override {
        address vaultProxy = getVaultProxyForFund(_comptrollerProxy);
        address[] memory policies = getEnabledPoliciesForFund(_comptrollerProxy);
        for (uint256 i; i < policies.length; i++) {
            if (!policyImplementsHook(policies[i], _hook)) {
                continue;
            }

            require(
                IPolicy(policies[i]).validateRule(
                    _comptrollerProxy,
                    vaultProxy,
                    _hook,
                    _validationData
                ),
                string(
                    abi.encodePacked(
                        "Rule evaluated to false: ",
                        IPolicy(policies[i]).identifier()
                    )
                )
            );
        }
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to activate a policy for a fund
    function __activatePolicyForFund(
        address _comptrollerProxy,
        address _vaultProxy,
        address _policy
    ) private {
        IPolicy(_policy).activateForFund(_comptrollerProxy, _vaultProxy);
    }

    /// @dev Helper to set config and enable policies for a fund
    function __enablePolicyForFund(
        address _comptrollerProxy,
        address _policy,
        bytes memory _settingsData
    ) private {
        require(
            !policyIsEnabledForFund(_comptrollerProxy, _policy),
            "__enablePolicyForFund: policy already enabled"
        );
        require(policyIsRegistered(_policy), "__enablePolicyForFund: Policy is not registered");

        // Set fund config on policy
        if (_settingsData.length > 0) {
            IPolicy(_policy).addFundSettings(_comptrollerProxy, _settingsData);
        }

        // Add policy
        comptrollerProxyToPolicies[_comptrollerProxy].add(_policy);

        emit PolicyEnabledForFund(_comptrollerProxy, _policy, _settingsData);
    }

    /// @dev Helper to validate fund owner.
    /// Preferred to a modifier because allows gas savings if re-using _vaultProxy.
    function __validateIsFundOwner(address _vaultProxy, address _who) private view {
        require(
            _who == IVault(_vaultProxy).getOwner(),
            "Only the fund owner can call this function"
        );
    }

    ///////////////////////
    // POLICIES REGISTRY //
    ///////////////////////

    /// @notice Remove policies from the list of registered policies
    /// @param _policies Addresses of policies to be registered
    function deregisterPolicies(address[] calldata _policies) external onlyFundDeployerOwner {
        require(_policies.length > 0, "deregisterPolicies: _policies cannot be empty");

        for (uint256 i; i < _policies.length; i++) {
            require(
                policyIsRegistered(_policies[i]),
                "deregisterPolicies: policy is not registered"
            );

            registeredPolicies.remove(_policies[i]);

            emit PolicyDeregistered(_policies[i], IPolicy(_policies[i]).identifier());
        }
    }

    /// @notice Add policies to the list of registered policies
    /// @param _policies Addresses of policies to be registered
    function registerPolicies(address[] calldata _policies) external onlyFundDeployerOwner {
        require(_policies.length > 0, "registerPolicies: _policies cannot be empty");

        for (uint256 i; i < _policies.length; i++) {
            require(
                !policyIsRegistered(_policies[i]),
                "registerPolicies: policy already registered"
            );

            registeredPolicies.add(_policies[i]);

            // Store the hooks that a policy implements for later use.
            // Fronts the gas for calls to check if a hook is implemented, and guarantees
            // that the implementsHooks return value does not change post-registration.
            IPolicy policyContract = IPolicy(_policies[i]);
            PolicyHook[] memory implementedHooks = policyContract.implementedHooks();
            for (uint256 j; j < implementedHooks.length; j++) {
                policyToHookToIsImplemented[_policies[i]][implementedHooks[j]] = true;
            }

            emit PolicyRegistered(_policies[i], policyContract.identifier(), implementedHooks);
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Get all registered policies
    /// @return registeredPoliciesArray_ A list of all registered policy addresses
    function getRegisteredPolicies()
        external
        view
        returns (address[] memory registeredPoliciesArray_)
    {
        registeredPoliciesArray_ = new address[](registeredPolicies.length());
        for (uint256 i; i < registeredPoliciesArray_.length; i++) {
            registeredPoliciesArray_[i] = registeredPolicies.at(i);
        }
    }

    /// @notice Get a list of enabled policies for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return enabledPolicies_ An array of enabled policy addresses
    function getEnabledPoliciesForFund(address _comptrollerProxy)
        public
        view
        returns (address[] memory enabledPolicies_)
    {
        enabledPolicies_ = new address[](comptrollerProxyToPolicies[_comptrollerProxy].length());
        for (uint256 i; i < enabledPolicies_.length; i++) {
            enabledPolicies_[i] = comptrollerProxyToPolicies[_comptrollerProxy].at(i);
        }
    }

    /// @notice Checks if a policy implements a particular hook
    /// @param _policy The address of the policy to check
    /// @param _hook The PolicyHook to check
    /// @return implementsHook_ True if the policy implements the hook
    function policyImplementsHook(address _policy, PolicyHook _hook)
        public
        view
        returns (bool implementsHook_)
    {
        return policyToHookToIsImplemented[_policy][_hook];
    }

    /// @notice Check if a policy is enabled for the fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund to check
    /// @param _policy The address of the policy to check
    /// @return isEnabled_ True if the policy is enabled for the fund
    function policyIsEnabledForFund(address _comptrollerProxy, address _policy)
        public
        view
        returns (bool isEnabled_)
    {
        return comptrollerProxyToPolicies[_comptrollerProxy].contains(_policy);
    }

    /// @notice Check whether a policy is registered
    /// @param _policy The address of the policy to check
    /// @return isRegistered_ True if the policy is registered
    function policyIsRegistered(address _policy) public view returns (bool isRegistered_) {
        return registeredPolicies.contains(_policy);
    }
}

File 20 of 138 : EnumerableSet.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @dev Library for managing
 * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive
 * types.
 *
 * Sets have the following properties:
 *
 * - Elements are added, removed, and checked for existence in constant time
 * (O(1)).
 * - Elements are enumerated in O(n). No guarantees are made on the ordering.
 *
 * ```
 * contract Example {
 *     // Add the library methods
 *     using EnumerableSet for EnumerableSet.AddressSet;
 *
 *     // Declare a set state variable
 *     EnumerableSet.AddressSet private mySet;
 * }
 * ```
 *
 * As of v3.0.0, only sets of type `address` (`AddressSet`) and `uint256`
 * (`UintSet`) are supported.
 */
library EnumerableSet {
    // To implement this library for multiple types with as little code
    // repetition as possible, we write it in terms of a generic Set type with
    // bytes32 values.
    // The Set implementation uses private functions, and user-facing
    // implementations (such as AddressSet) are just wrappers around the
    // underlying Set.
    // This means that we can only create new EnumerableSets for types that fit
    // in bytes32.

    struct Set {
        // Storage of set values
        bytes32[] _values;

        // Position of the value in the `values` array, plus 1 because index 0
        // means a value is not in the set.
        mapping (bytes32 => uint256) _indexes;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function _add(Set storage set, bytes32 value) private returns (bool) {
        if (!_contains(set, value)) {
            set._values.push(value);
            // The value is stored at length-1, but we add 1 to all indexes
            // and use 0 as a sentinel value
            set._indexes[value] = set._values.length;
            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function _remove(Set storage set, bytes32 value) private returns (bool) {
        // We read and store the value's index to prevent multiple reads from the same storage slot
        uint256 valueIndex = set._indexes[value];

        if (valueIndex != 0) { // Equivalent to contains(set, value)
            // To delete an element from the _values array in O(1), we swap the element to delete with the last one in
            // the array, and then remove the last element (sometimes called as 'swap and pop').
            // This modifies the order of the array, as noted in {at}.

            uint256 toDeleteIndex = valueIndex - 1;
            uint256 lastIndex = set._values.length - 1;

            // When the value to delete is the last one, the swap operation is unnecessary. However, since this occurs
            // so rarely, we still do the swap anyway to avoid the gas cost of adding an 'if' statement.

            bytes32 lastvalue = set._values[lastIndex];

            // Move the last value to the index where the value to delete is
            set._values[toDeleteIndex] = lastvalue;
            // Update the index for the moved value
            set._indexes[lastvalue] = toDeleteIndex + 1; // All indexes are 1-based

            // Delete the slot where the moved value was stored
            set._values.pop();

            // Delete the index for the deleted slot
            delete set._indexes[value];

            return true;
        } else {
            return false;
        }
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function _contains(Set storage set, bytes32 value) private view returns (bool) {
        return set._indexes[value] != 0;
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function _length(Set storage set) private view returns (uint256) {
        return set._values.length;
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function _at(Set storage set, uint256 index) private view returns (bytes32) {
        require(set._values.length > index, "EnumerableSet: index out of bounds");
        return set._values[index];
    }

    // AddressSet

    struct AddressSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(AddressSet storage set, address value) internal returns (bool) {
        return _add(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(AddressSet storage set, address value) internal returns (bool) {
        return _remove(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(AddressSet storage set, address value) internal view returns (bool) {
        return _contains(set._inner, bytes32(uint256(value)));
    }

    /**
     * @dev Returns the number of values in the set. O(1).
     */
    function length(AddressSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(AddressSet storage set, uint256 index) internal view returns (address) {
        return address(uint256(_at(set._inner, index)));
    }


    // UintSet

    struct UintSet {
        Set _inner;
    }

    /**
     * @dev Add a value to a set. O(1).
     *
     * Returns true if the value was added to the set, that is if it was not
     * already present.
     */
    function add(UintSet storage set, uint256 value) internal returns (bool) {
        return _add(set._inner, bytes32(value));
    }

    /**
     * @dev Removes a value from a set. O(1).
     *
     * Returns true if the value was removed from the set, that is if it was
     * present.
     */
    function remove(UintSet storage set, uint256 value) internal returns (bool) {
        return _remove(set._inner, bytes32(value));
    }

    /**
     * @dev Returns true if the value is in the set. O(1).
     */
    function contains(UintSet storage set, uint256 value) internal view returns (bool) {
        return _contains(set._inner, bytes32(value));
    }

    /**
     * @dev Returns the number of values on the set. O(1).
     */
    function length(UintSet storage set) internal view returns (uint256) {
        return _length(set._inner);
    }

   /**
    * @dev Returns the value stored at position `index` in the set. O(1).
    *
    * Note that there are no guarantees on the ordering of values inside the
    * array, and it may change when more values are added or removed.
    *
    * Requirements:
    *
    * - `index` must be strictly less than {length}.
    */
    function at(UintSet storage set, uint256 index) internal view returns (uint256) {
        return uint256(_at(set._inner, index));
    }
}

File 21 of 138 : IVault.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../../persistent/utils/IMigratableVault.sol";

/// @title IVault Interface
/// @author Enzyme Council <[email protected]>
interface IVault is IMigratableVault {
    function addTrackedAsset(address) external;

    function approveAssetSpender(
        address,
        address,
        uint256
    ) external;

    function burnShares(address, uint256) external;

    function callOnContract(address, bytes calldata) external;

    function getAccessor() external view returns (address);

    function getOwner() external view returns (address);

    function getTrackedAssets() external view returns (address[] memory);

    function isTrackedAsset(address) external view returns (bool);

    function mintShares(address, uint256) external;

    function removeTrackedAsset(address) external;

    function transferShares(
        address,
        address,
        uint256
    ) external;

    function withdrawAssetTo(
        address,
        address,
        uint256
    ) external;
}

File 22 of 138 : ExtensionBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../core/fund/comptroller/IComptroller.sol";
import "../../core/fund/vault/IVault.sol";
import "../IExtension.sol";

/// @title ExtensionBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Base class for an extension
abstract contract ExtensionBase is IExtension {
    mapping(address => address) internal comptrollerProxyToVaultProxy;

    /// @notice Allows extension to run logic during fund activation
    /// @dev Unimplemented by default, may be overridden.
    function activateForFund(bool) external virtual override {
        return;
    }

    /// @notice Allows extension to run logic during fund deactivation (destruct)
    /// @dev Unimplemented by default, may be overridden.
    function deactivateForFund() external virtual override {
        return;
    }

    /// @notice Receives calls from ComptrollerLib.callOnExtension()
    /// and dispatches the appropriate action
    /// @dev Unimplemented by default, may be overridden.
    function receiveCallFromComptroller(
        address,
        uint256,
        bytes calldata
    ) external virtual override {
        revert("receiveCallFromComptroller: Unimplemented for Extension");
    }

    /// @notice Allows extension to run logic during fund configuration
    /// @dev Unimplemented by default, may be overridden.
    function setConfigForFund(bytes calldata) external virtual override {
        return;
    }

    /// @dev Helper to validate a ComptrollerProxy-VaultProxy relation, which we store for both
    /// gas savings and to guarantee a spoofed ComptrollerProxy does not change getVaultProxy().
    /// Will revert without reason if the expected interfaces do not exist.
    function __setValidatedVaultProxy(address _comptrollerProxy)
        internal
        returns (address vaultProxy_)
    {
        require(
            comptrollerProxyToVaultProxy[_comptrollerProxy] == address(0),
            "__setValidatedVaultProxy: Already set"
        );

        vaultProxy_ = IComptroller(_comptrollerProxy).getVaultProxy();
        require(vaultProxy_ != address(0), "__setValidatedVaultProxy: Missing vaultProxy");

        require(
            _comptrollerProxy == IVault(vaultProxy_).getAccessor(),
            "__setValidatedVaultProxy: Not the VaultProxy accessor"
        );

        comptrollerProxyToVaultProxy[_comptrollerProxy] = vaultProxy_;

        return vaultProxy_;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the verified VaultProxy for a given ComptrollerProxy
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return vaultProxy_ The VaultProxy of the fund
    function getVaultProxyForFund(address _comptrollerProxy)
        public
        view
        returns (address vaultProxy_)
    {
        return comptrollerProxyToVaultProxy[_comptrollerProxy];
    }
}

File 23 of 138 : IPolicy.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./IPolicyManager.sol";

/// @title Policy Interface
/// @author Enzyme Council <[email protected]>
interface IPolicy {
    function activateForFund(address _comptrollerProxy, address _vaultProxy) external;

    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings) external;

    function identifier() external pure returns (string memory identifier_);

    function implementedHooks()
        external
        view
        returns (IPolicyManager.PolicyHook[] memory implementedHooks_);

    function updateFundSettings(
        address _comptrollerProxy,
        address _vaultProxy,
        bytes calldata _encodedSettings
    ) external;

    function validateRule(
        address _comptrollerProxy,
        address _vaultProxy,
        IPolicyManager.PolicyHook _hook,
        bytes calldata _encodedArgs
    ) external returns (bool isValid_);
}

File 24 of 138 : IPolicyManager.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

/// @title PolicyManager Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the PolicyManager
interface IPolicyManager {
    enum PolicyHook {
        BuySharesSetup,
        PreBuyShares,
        PostBuyShares,
        BuySharesCompleted,
        PreCallOnIntegration,
        PostCallOnIntegration
    }

    function validatePolicies(
        address,
        PolicyHook,
        bytes calldata
    ) external;
}

File 25 of 138 : IMigratableVault.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IMigratableVault Interface
/// @author Enzyme Council <[email protected]>
/// @dev DO NOT EDIT CONTRACT
interface IMigratableVault {
    function canMigrate(address _who) external view returns (bool canMigrate_);

    function init(
        address _owner,
        address _accessor,
        string calldata _fundName
    ) external;

    function setAccessor(address _nextAccessor) external;

    function setVaultLib(address _nextVaultLib) external;
}

File 26 of 138 : IComptroller.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IComptroller Interface
/// @author Enzyme Council <[email protected]>
interface IComptroller {
    enum VaultAction {
        None,
        BurnShares,
        MintShares,
        TransferShares,
        ApproveAssetSpender,
        WithdrawAssetTo,
        AddTrackedAsset,
        RemoveTrackedAsset
    }

    function activate(address, bool) external;

    function calcGav(bool) external returns (uint256, bool);

    function calcGrossShareValue(bool) external returns (uint256, bool);

    function callOnExtension(
        address,
        uint256,
        bytes calldata
    ) external;

    function configureExtensions(bytes calldata, bytes calldata) external;

    function destruct() external;

    function getDenominationAsset() external view returns (address);

    function getVaultProxy() external view returns (address);

    function init(address, uint256) external;

    function permissionedVaultAction(VaultAction, bytes calldata) external;
}

File 27 of 138 : IExtension.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IExtension Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all extensions
interface IExtension {
    function activateForFund(bool _isMigration) external;

    function deactivateForFund() external;

    function receiveCallFromComptroller(
        address _comptrollerProxy,
        uint256 _actionId,
        bytes calldata _callArgs
    ) external;

    function setConfigForFund(bytes calldata _configData) external;
}

File 28 of 138 : PolicyBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../IPolicy.sol";

/// @title PolicyBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Abstract base contract for all policies
abstract contract PolicyBase is IPolicy {
    address internal immutable POLICY_MANAGER;

    modifier onlyPolicyManager {
        require(msg.sender == POLICY_MANAGER, "Only the PolicyManager can make this call");
        _;
    }

    constructor(address _policyManager) public {
        POLICY_MANAGER = _policyManager;
    }

    /// @notice Validates and initializes a policy as necessary prior to fund activation
    /// @dev Unimplemented by default, can be overridden by the policy
    function activateForFund(address, address) external virtual override {
        return;
    }

    /// @notice Updates the policy settings for a fund
    /// @dev Disallowed by default, can be overridden by the policy
    function updateFundSettings(
        address,
        address,
        bytes calldata
    ) external virtual override {
        revert("updateFundSettings: Updates not allowed for this policy");
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `POLICY_MANAGER` variable value
    /// @return policyManager_ The `POLICY_MANAGER` variable value
    function getPolicyManager() external view returns (address policyManager_) {
        return POLICY_MANAGER;
    }
}

File 29 of 138 : PostCallOnIntegrationValidatePolicyBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../utils/PolicyBase.sol";

/// @title CallOnIntegrationPostValidatePolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the PostCallOnIntegration policy hook
abstract contract PostCallOnIntegrationValidatePolicyBase is PolicyBase {
    /// @notice Gets the implemented PolicyHooks for a policy
    /// @return implementedHooks_ The implemented PolicyHooks
    function implementedHooks()
        external
        view
        override
        returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
    {
        implementedHooks_ = new IPolicyManager.PolicyHook[](1);
        implementedHooks_[0] = IPolicyManager.PolicyHook.PostCallOnIntegration;

        return implementedHooks_;
    }

    /// @notice Helper to decode rule arguments
    function __decodeRuleArgs(bytes memory _encodedRuleArgs)
        internal
        pure
        returns (
            address adapter_,
            bytes4 selector_,
            address[] memory incomingAssets_,
            uint256[] memory incomingAssetAmounts_,
            address[] memory outgoingAssets_,
            uint256[] memory outgoingAssetAmounts_
        )
    {
        return
            abi.decode(
                _encodedRuleArgs,
                (address, bytes4, address[], uint256[], address[], uint256[])
            );
    }
}

File 30 of 138 : MaxConcentration.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../core/fund/comptroller/ComptrollerLib.sol";
import "../../../../core/fund/vault/VaultLib.sol";
import "../../../../infrastructure/value-interpreter/ValueInterpreter.sol";
import "./utils/PostCallOnIntegrationValidatePolicyBase.sol";

/// @title MaxConcentration Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that defines a configurable threshold for the concentration of any one asset
/// in a fund's holdings
contract MaxConcentration is PostCallOnIntegrationValidatePolicyBase {
    using SafeMath for uint256;

    event MaxConcentrationSet(address indexed comptrollerProxy, uint256 value);

    uint256 private constant ONE_HUNDRED_PERCENT = 10**18; // 100%

    address private immutable VALUE_INTERPRETER;

    mapping(address => uint256) private comptrollerProxyToMaxConcentration;

    constructor(address _policyManager, address _valueInterpreter)
        public
        PolicyBase(_policyManager)
    {
        VALUE_INTERPRETER = _valueInterpreter;
    }

    /// @notice Validates and initializes a policy as necessary prior to fund activation
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _vaultProxy The fund's VaultProxy address
    /// @dev No need to authenticate access, as there are no state transitions
    function activateForFund(address _comptrollerProxy, address _vaultProxy)
        external
        override
        onlyPolicyManager
    {
        require(
            passesRule(_comptrollerProxy, _vaultProxy, VaultLib(_vaultProxy).getTrackedAssets()),
            "activateForFund: Max concentration exceeded"
        );
    }

    /// @notice Add the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        uint256 maxConcentration = abi.decode(_encodedSettings, (uint256));
        require(maxConcentration > 0, "addFundSettings: maxConcentration must be greater than 0");
        require(
            maxConcentration <= ONE_HUNDRED_PERCENT,
            "addFundSettings: maxConcentration cannot exceed 100%"
        );

        comptrollerProxyToMaxConcentration[_comptrollerProxy] = maxConcentration;

        emit MaxConcentrationSet(_comptrollerProxy, maxConcentration);
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "MAX_CONCENTRATION";
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _vaultProxy The fund's VaultProxy address
    /// @param _assets The assets with which to check the rule
    /// @return isValid_ True if the rule passes
    /// @dev The fund's denomination asset is exempt from the policy limit.
    function passesRule(
        address _comptrollerProxy,
        address _vaultProxy,
        address[] memory _assets
    ) public returns (bool isValid_) {
        uint256 maxConcentration = comptrollerProxyToMaxConcentration[_comptrollerProxy];
        ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);
        address denominationAsset = comptrollerProxyContract.getDenominationAsset();
        // Does not require asset finality, otherwise will fail when incoming asset is a Synth
        (uint256 totalGav, bool gavIsValid) = comptrollerProxyContract.calcGav(false);
        if (!gavIsValid) {
            return false;
        }

        for (uint256 i = 0; i < _assets.length; i++) {
            address asset = _assets[i];
            if (
                !__rulePassesForAsset(
                    _vaultProxy,
                    denominationAsset,
                    maxConcentration,
                    totalGav,
                    asset
                )
            ) {
                return false;
            }
        }

        return true;
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _vaultProxy The fund's VaultProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address _vaultProxy,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (, , address[] memory incomingAssets, , , ) = __decodeRuleArgs(_encodedArgs);
        if (incomingAssets.length == 0) {
            return true;
        }

        return passesRule(_comptrollerProxy, _vaultProxy, incomingAssets);
    }

    /// @dev Helper to check if the rule holds for a particular asset.
    /// Avoids the stack-too-deep error.
    function __rulePassesForAsset(
        address _vaultProxy,
        address _denominationAsset,
        uint256 _maxConcentration,
        uint256 _totalGav,
        address _incomingAsset
    ) private returns (bool isValid_) {
        if (_incomingAsset == _denominationAsset) return true;

        uint256 assetBalance = ERC20(_incomingAsset).balanceOf(_vaultProxy);
        (uint256 assetGav, bool assetGavIsValid) = ValueInterpreter(VALUE_INTERPRETER)
            .calcLiveAssetValue(_incomingAsset, assetBalance, _denominationAsset);

        if (
            !assetGavIsValid ||
            assetGav.mul(ONE_HUNDRED_PERCENT).div(_totalGav) > _maxConcentration
        ) {
            return false;
        }

        return true;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the maxConcentration for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return maxConcentration_ The maxConcentration
    function getMaxConcentrationForFund(address _comptrollerProxy)
        external
        view
        returns (uint256 maxConcentration_)
    {
        return comptrollerProxyToMaxConcentration[_comptrollerProxy];
    }

    /// @notice Gets the `VALUE_INTERPRETER` variable
    /// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
    function getValueInterpreter() external view returns (address valueInterpreter_) {
        return VALUE_INTERPRETER;
    }
}

File 31 of 138 : ComptrollerLib.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../../../persistent/dispatcher/IDispatcher.sol";
import "../../../extensions/IExtension.sol";
import "../../../extensions/fee-manager/IFeeManager.sol";
import "../../../extensions/policy-manager/IPolicyManager.sol";
import "../../../infrastructure/price-feeds/primitives/IPrimitivePriceFeed.sol";
import "../../../infrastructure/value-interpreter/IValueInterpreter.sol";
import "../../../utils/AddressArrayLib.sol";
import "../../../utils/AssetFinalityResolver.sol";
import "../../fund-deployer/IFundDeployer.sol";
import "../vault/IVault.sol";
import "./IComptroller.sol";

/// @title ComptrollerLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice The core logic library shared by all funds
contract ComptrollerLib is IComptroller, AssetFinalityResolver {
    using AddressArrayLib for address[];
    using SafeMath for uint256;
    using SafeERC20 for ERC20;

    event MigratedSharesDuePaid(uint256 sharesDue);

    event OverridePauseSet(bool indexed overridePause);

    event PreRedeemSharesHookFailed(
        bytes failureReturnData,
        address redeemer,
        uint256 sharesQuantity
    );

    event SharesBought(
        address indexed caller,
        address indexed buyer,
        uint256 investmentAmount,
        uint256 sharesIssued,
        uint256 sharesReceived
    );

    event SharesRedeemed(
        address indexed redeemer,
        uint256 sharesQuantity,
        address[] receivedAssets,
        uint256[] receivedAssetQuantities
    );

    event VaultProxySet(address vaultProxy);

    // Constants and immutables - shared by all proxies
    uint256 private constant SHARES_UNIT = 10**18;
    address private immutable DISPATCHER;
    address private immutable FUND_DEPLOYER;
    address private immutable FEE_MANAGER;
    address private immutable INTEGRATION_MANAGER;
    address private immutable PRIMITIVE_PRICE_FEED;
    address private immutable POLICY_MANAGER;
    address private immutable VALUE_INTERPRETER;

    // Pseudo-constants (can only be set once)

    address internal denominationAsset;
    address internal vaultProxy;
    // True only for the one non-proxy
    bool internal isLib;

    // Storage

    // Allows a fund owner to override a release-level pause
    bool internal overridePause;
    // A reverse-mutex, granting atomic permission for particular contracts to make vault calls
    bool internal permissionedVaultActionAllowed;
    // A mutex to protect against reentrancy
    bool internal reentranceLocked;
    // A timelock between any "shares actions" (i.e., buy and redeem shares), per-account
    uint256 internal sharesActionTimelock;
    mapping(address => uint256) internal acctToLastSharesAction;

    ///////////////
    // MODIFIERS //
    ///////////////

    modifier allowsPermissionedVaultAction {
        __assertPermissionedVaultActionNotAllowed();
        permissionedVaultActionAllowed = true;
        _;
        permissionedVaultActionAllowed = false;
    }

    modifier locksReentrance() {
        __assertNotReentranceLocked();
        reentranceLocked = true;
        _;
        reentranceLocked = false;
    }

    modifier onlyActive() {
        __assertIsActive(vaultProxy);
        _;
    }

    modifier onlyNotPaused() {
        __assertNotPaused();
        _;
    }

    modifier onlyFundDeployer() {
        __assertIsFundDeployer(msg.sender);
        _;
    }

    modifier onlyOwner() {
        __assertIsOwner(msg.sender);
        _;
    }

    modifier timelockedSharesAction(address _account) {
        __assertSharesActionNotTimelocked(_account);
        _;
        acctToLastSharesAction[_account] = block.timestamp;
    }

    // ASSERTION HELPERS

    // Modifiers are inefficient in terms of contract size,
    // so we use helper functions to prevent repetitive inlining of expensive string values.

    /// @dev Since vaultProxy is set during activate(),
    /// we can check that var rather than storing additional state
    function __assertIsActive(address _vaultProxy) private pure {
        require(_vaultProxy != address(0), "Fund not active");
    }

    function __assertIsFundDeployer(address _who) private view {
        require(_who == FUND_DEPLOYER, "Only FundDeployer callable");
    }

    function __assertIsOwner(address _who) private view {
        require(_who == IVault(vaultProxy).getOwner(), "Only fund owner callable");
    }

    function __assertLowLevelCall(bool _success, bytes memory _returnData) private pure {
        require(_success, string(_returnData));
    }

    function __assertNotPaused() private view {
        require(!__fundIsPaused(), "Fund is paused");
    }

    function __assertNotReentranceLocked() private view {
        require(!reentranceLocked, "Re-entrance");
    }

    function __assertPermissionedVaultActionNotAllowed() private view {
        require(!permissionedVaultActionAllowed, "Vault action re-entrance");
    }

    function __assertSharesActionNotTimelocked(address _account) private view {
        require(
            block.timestamp.sub(acctToLastSharesAction[_account]) >= sharesActionTimelock,
            "Shares action timelocked"
        );
    }

    constructor(
        address _dispatcher,
        address _fundDeployer,
        address _valueInterpreter,
        address _feeManager,
        address _integrationManager,
        address _policyManager,
        address _primitivePriceFeed,
        address _synthetixPriceFeed,
        address _synthetixAddressResolver
    ) public AssetFinalityResolver(_synthetixPriceFeed, _synthetixAddressResolver) {
        DISPATCHER = _dispatcher;
        FEE_MANAGER = _feeManager;
        FUND_DEPLOYER = _fundDeployer;
        INTEGRATION_MANAGER = _integrationManager;
        PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
        POLICY_MANAGER = _policyManager;
        VALUE_INTERPRETER = _valueInterpreter;
        isLib = true;
    }

    /////////////
    // GENERAL //
    /////////////

    /// @notice Calls a specified action on an Extension
    /// @param _extension The Extension contract to call (e.g., FeeManager)
    /// @param _actionId An ID representing the action to take on the extension (see extension)
    /// @param _callArgs The encoded data for the call
    /// @dev Used to route arbitrary calls, so that msg.sender is the ComptrollerProxy
    /// (for access control). Uses a mutex of sorts that allows "permissioned vault actions"
    /// during calls originating from this function.
    function callOnExtension(
        address _extension,
        uint256 _actionId,
        bytes calldata _callArgs
    ) external override onlyNotPaused onlyActive locksReentrance allowsPermissionedVaultAction {
        require(
            _extension == FEE_MANAGER || _extension == INTEGRATION_MANAGER,
            "callOnExtension: _extension invalid"
        );

        IExtension(_extension).receiveCallFromComptroller(msg.sender, _actionId, _callArgs);
    }

    /// @notice Sets or unsets an override on a release-wide pause
    /// @param _nextOverridePause True if the pause should be overrode
    function setOverridePause(bool _nextOverridePause) external onlyOwner {
        require(_nextOverridePause != overridePause, "setOverridePause: Value already set");

        overridePause = _nextOverridePause;

        emit OverridePauseSet(_nextOverridePause);
    }

    /// @notice Makes an arbitrary call with the VaultProxy contract as the sender
    /// @param _contract The contract to call
    /// @param _selector The selector to call
    /// @param _encodedArgs The encoded arguments for the call
    function vaultCallOnContract(
        address _contract,
        bytes4 _selector,
        bytes calldata _encodedArgs
    ) external onlyNotPaused onlyActive onlyOwner {
        require(
            IFundDeployer(FUND_DEPLOYER).isRegisteredVaultCall(_contract, _selector),
            "vaultCallOnContract: Unregistered"
        );

        IVault(vaultProxy).callOnContract(_contract, abi.encodePacked(_selector, _encodedArgs));
    }

    /// @dev Helper to check whether the release is paused, and that there is no local override
    function __fundIsPaused() private view returns (bool) {
        return
            IFundDeployer(FUND_DEPLOYER).getReleaseStatus() ==
            IFundDeployer.ReleaseStatus.Paused &&
            !overridePause;
    }

    ////////////////////////////////
    // PERMISSIONED VAULT ACTIONS //
    ////////////////////////////////

    /// @notice Makes a permissioned, state-changing call on the VaultProxy contract
    /// @param _action The enum representing the VaultAction to perform on the VaultProxy
    /// @param _actionData The call data for the action to perform
    function permissionedVaultAction(VaultAction _action, bytes calldata _actionData)
        external
        override
        onlyNotPaused
        onlyActive
    {
        __assertPermissionedVaultAction(msg.sender, _action);

        if (_action == VaultAction.AddTrackedAsset) {
            __vaultActionAddTrackedAsset(_actionData);
        } else if (_action == VaultAction.ApproveAssetSpender) {
            __vaultActionApproveAssetSpender(_actionData);
        } else if (_action == VaultAction.BurnShares) {
            __vaultActionBurnShares(_actionData);
        } else if (_action == VaultAction.MintShares) {
            __vaultActionMintShares(_actionData);
        } else if (_action == VaultAction.RemoveTrackedAsset) {
            __vaultActionRemoveTrackedAsset(_actionData);
        } else if (_action == VaultAction.TransferShares) {
            __vaultActionTransferShares(_actionData);
        } else if (_action == VaultAction.WithdrawAssetTo) {
            __vaultActionWithdrawAssetTo(_actionData);
        }
    }

    /// @dev Helper to assert that a caller is allowed to perform a particular VaultAction
    function __assertPermissionedVaultAction(address _caller, VaultAction _action) private view {
        require(
            permissionedVaultActionAllowed,
            "__assertPermissionedVaultAction: No action allowed"
        );

        if (_caller == INTEGRATION_MANAGER) {
            require(
                _action == VaultAction.ApproveAssetSpender ||
                    _action == VaultAction.AddTrackedAsset ||
                    _action == VaultAction.RemoveTrackedAsset ||
                    _action == VaultAction.WithdrawAssetTo,
                "__assertPermissionedVaultAction: Not valid for IntegrationManager"
            );
        } else if (_caller == FEE_MANAGER) {
            require(
                _action == VaultAction.BurnShares ||
                    _action == VaultAction.MintShares ||
                    _action == VaultAction.TransferShares,
                "__assertPermissionedVaultAction: Not valid for FeeManager"
            );
        } else {
            revert("__assertPermissionedVaultAction: Not a valid actor");
        }
    }

    /// @dev Helper to add a tracked asset to the fund
    function __vaultActionAddTrackedAsset(bytes memory _actionData) private {
        address asset = abi.decode(_actionData, (address));
        IVault(vaultProxy).addTrackedAsset(asset);
    }

    /// @dev Helper to grant a spender an allowance for a fund's asset
    function __vaultActionApproveAssetSpender(bytes memory _actionData) private {
        (address asset, address target, uint256 amount) = abi.decode(
            _actionData,
            (address, address, uint256)
        );
        IVault(vaultProxy).approveAssetSpender(asset, target, amount);
    }

    /// @dev Helper to burn fund shares for a particular account
    function __vaultActionBurnShares(bytes memory _actionData) private {
        (address target, uint256 amount) = abi.decode(_actionData, (address, uint256));
        IVault(vaultProxy).burnShares(target, amount);
    }

    /// @dev Helper to mint fund shares to a particular account
    function __vaultActionMintShares(bytes memory _actionData) private {
        (address target, uint256 amount) = abi.decode(_actionData, (address, uint256));
        IVault(vaultProxy).mintShares(target, amount);
    }

    /// @dev Helper to remove a tracked asset from the fund
    function __vaultActionRemoveTrackedAsset(bytes memory _actionData) private {
        address asset = abi.decode(_actionData, (address));

        // Allowing this to fail silently makes it cheaper and simpler
        // for Extensions to not query for the denomination asset
        if (asset != denominationAsset) {
            IVault(vaultProxy).removeTrackedAsset(asset);
        }
    }

    /// @dev Helper to transfer fund shares from one account to another
    function __vaultActionTransferShares(bytes memory _actionData) private {
        (address from, address to, uint256 amount) = abi.decode(
            _actionData,
            (address, address, uint256)
        );
        IVault(vaultProxy).transferShares(from, to, amount);
    }

    /// @dev Helper to withdraw an asset from the VaultProxy to a given account
    function __vaultActionWithdrawAssetTo(bytes memory _actionData) private {
        (address asset, address target, uint256 amount) = abi.decode(
            _actionData,
            (address, address, uint256)
        );
        IVault(vaultProxy).withdrawAssetTo(asset, target, amount);
    }

    ///////////////
    // LIFECYCLE //
    ///////////////

    /// @notice Initializes a fund with its core config
    /// @param _denominationAsset The asset in which the fund's value should be denominated
    /// @param _sharesActionTimelock The minimum number of seconds between any two "shares actions"
    /// (buying or selling shares) by the same user
    /// @dev Pseudo-constructor per proxy.
    /// No need to assert access because this is called atomically on deployment,
    /// and once it's called, it cannot be called again.
    function init(address _denominationAsset, uint256 _sharesActionTimelock) external override {
        require(denominationAsset == address(0), "init: Already initialized");
        require(
            IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_denominationAsset),
            "init: Bad denomination asset"
        );

        denominationAsset = _denominationAsset;
        sharesActionTimelock = _sharesActionTimelock;
    }

    /// @notice Configure the extensions of a fund
    /// @param _feeManagerConfigData Encoded config for fees to enable
    /// @param _policyManagerConfigData Encoded config for policies to enable
    /// @dev No need to assert anything beyond FundDeployer access.
    /// Called atomically with init(), but after ComptrollerLib has been deployed,
    /// giving access to its state and interface
    function configureExtensions(
        bytes calldata _feeManagerConfigData,
        bytes calldata _policyManagerConfigData
    ) external override onlyFundDeployer {
        if (_feeManagerConfigData.length > 0) {
            IExtension(FEE_MANAGER).setConfigForFund(_feeManagerConfigData);
        }
        if (_policyManagerConfigData.length > 0) {
            IExtension(POLICY_MANAGER).setConfigForFund(_policyManagerConfigData);
        }
    }

    /// @notice Activates the fund by attaching a VaultProxy and activating all Extensions
    /// @param _vaultProxy The VaultProxy to attach to the fund
    /// @param _isMigration True if a migrated fund is being activated
    /// @dev No need to assert anything beyond FundDeployer access.
    function activate(address _vaultProxy, bool _isMigration) external override onlyFundDeployer {
        vaultProxy = _vaultProxy;

        emit VaultProxySet(_vaultProxy);

        if (_isMigration) {
            // Distribute any shares in the VaultProxy to the fund owner.
            // This is a mechanism to ensure that even in the edge case of a fund being unable
            // to payout fee shares owed during migration, these shares are not lost.
            uint256 sharesDue = ERC20(_vaultProxy).balanceOf(_vaultProxy);
            if (sharesDue > 0) {
                IVault(_vaultProxy).transferShares(
                    _vaultProxy,
                    IVault(_vaultProxy).getOwner(),
                    sharesDue
                );

                emit MigratedSharesDuePaid(sharesDue);
            }
        }

        // Note: a future release could consider forcing the adding of a tracked asset here,
        // just in case a fund is migrating from an old configuration where they are not able
        // to remove an asset to get under the tracked assets limit
        IVault(_vaultProxy).addTrackedAsset(denominationAsset);

        // Activate extensions
        IExtension(FEE_MANAGER).activateForFund(_isMigration);
        IExtension(INTEGRATION_MANAGER).activateForFund(_isMigration);
        IExtension(POLICY_MANAGER).activateForFund(_isMigration);
    }

    /// @notice Remove the config for a fund
    /// @dev No need to assert anything beyond FundDeployer access.
    /// Calling onlyNotPaused here rather than in the FundDeployer allows
    /// the owner to potentially override the pause and rescue unpaid fees.
    function destruct()
        external
        override
        onlyFundDeployer
        onlyNotPaused
        allowsPermissionedVaultAction
    {
        // Failsafe to protect the libs against selfdestruct
        require(!isLib, "destruct: Only delegate callable");

        // Deactivate the extensions
        IExtension(FEE_MANAGER).deactivateForFund();
        IExtension(INTEGRATION_MANAGER).deactivateForFund();
        IExtension(POLICY_MANAGER).deactivateForFund();

        // Delete storage of ComptrollerProxy
        // There should never be ETH in the ComptrollerLib, so no need to waste gas
        // to get the fund owner
        selfdestruct(address(0));
    }

    ////////////////
    // ACCOUNTING //
    ////////////////

    /// @notice Calculates the gross asset value (GAV) of the fund
    /// @param _requireFinality True if all assets must have exact final balances settled
    /// @return gav_ The fund GAV
    /// @return isValid_ True if the conversion rates used to derive the GAV are all valid
    function calcGav(bool _requireFinality) public override returns (uint256 gav_, bool isValid_) {
        address vaultProxyAddress = vaultProxy;
        address[] memory assets = IVault(vaultProxyAddress).getTrackedAssets();
        if (assets.length == 0) {
            return (0, true);
        }

        uint256[] memory balances = new uint256[](assets.length);
        for (uint256 i; i < assets.length; i++) {
            balances[i] = __finalizeIfSynthAndGetAssetBalance(
                vaultProxyAddress,
                assets[i],
                _requireFinality
            );
        }

        (gav_, isValid_) = IValueInterpreter(VALUE_INTERPRETER).calcCanonicalAssetsTotalValue(
            assets,
            balances,
            denominationAsset
        );

        return (gav_, isValid_);
    }

    /// @notice Calculates the gross value of 1 unit of shares in the fund's denomination asset
    /// @param _requireFinality True if all assets must have exact final balances settled
    /// @return grossShareValue_ The amount of the denomination asset per share
    /// @return isValid_ True if the conversion rates to derive the value are all valid
    /// @dev Does not account for any fees outstanding.
    function calcGrossShareValue(bool _requireFinality)
        external
        override
        returns (uint256 grossShareValue_, bool isValid_)
    {
        uint256 gav;
        (gav, isValid_) = calcGav(_requireFinality);

        grossShareValue_ = __calcGrossShareValue(
            gav,
            ERC20(vaultProxy).totalSupply(),
            10**uint256(ERC20(denominationAsset).decimals())
        );

        return (grossShareValue_, isValid_);
    }

    /// @dev Helper for calculating the gross share value
    function __calcGrossShareValue(
        uint256 _gav,
        uint256 _sharesSupply,
        uint256 _denominationAssetUnit
    ) private pure returns (uint256 grossShareValue_) {
        if (_sharesSupply == 0) {
            return _denominationAssetUnit;
        }

        return _gav.mul(SHARES_UNIT).div(_sharesSupply);
    }

    ///////////////////
    // PARTICIPATION //
    ///////////////////

    // BUY SHARES

    /// @notice Buys shares in the fund for multiple sets of criteria
    /// @param _buyers The accounts for which to buy shares
    /// @param _investmentAmounts The amounts of the fund's denomination asset
    /// with which to buy shares for the corresponding _buyers
    /// @param _minSharesQuantities The minimum quantities of shares to buy
    /// with the corresponding _investmentAmounts
    /// @return sharesReceivedAmounts_ The actual amounts of shares received
    /// by the corresponding _buyers
    /// @dev Param arrays have indexes corresponding to individual __buyShares() orders.
    function buyShares(
        address[] calldata _buyers,
        uint256[] calldata _investmentAmounts,
        uint256[] calldata _minSharesQuantities
    )
        external
        onlyNotPaused
        locksReentrance
        allowsPermissionedVaultAction
        returns (uint256[] memory sharesReceivedAmounts_)
    {
        require(_buyers.length > 0, "buyShares: Empty _buyers");
        require(
            _buyers.length == _investmentAmounts.length &&
                _buyers.length == _minSharesQuantities.length,
            "buyShares: Unequal arrays"
        );

        address vaultProxyCopy = vaultProxy;
        __assertIsActive(vaultProxyCopy);
        require(
            !IDispatcher(DISPATCHER).hasMigrationRequest(vaultProxyCopy),
            "buyShares: Pending migration"
        );

        (uint256 gav, bool gavIsValid) = calcGav(true);
        require(gavIsValid, "buyShares: Invalid GAV");

        __buySharesSetupHook(msg.sender, _investmentAmounts, gav);

        address denominationAssetCopy = denominationAsset;
        uint256 sharePrice = __calcGrossShareValue(
            gav,
            ERC20(vaultProxyCopy).totalSupply(),
            10**uint256(ERC20(denominationAssetCopy).decimals())
        );

        sharesReceivedAmounts_ = new uint256[](_buyers.length);
        for (uint256 i; i < _buyers.length; i++) {
            sharesReceivedAmounts_[i] = __buyShares(
                _buyers[i],
                _investmentAmounts[i],
                _minSharesQuantities[i],
                vaultProxyCopy,
                sharePrice,
                gav,
                denominationAssetCopy
            );

            gav = gav.add(_investmentAmounts[i]);
        }

        __buySharesCompletedHook(msg.sender, sharesReceivedAmounts_, gav);

        return sharesReceivedAmounts_;
    }

    /// @dev Helper to buy shares
    function __buyShares(
        address _buyer,
        uint256 _investmentAmount,
        uint256 _minSharesQuantity,
        address _vaultProxy,
        uint256 _sharePrice,
        uint256 _preBuySharesGav,
        address _denominationAsset
    ) private timelockedSharesAction(_buyer) returns (uint256 sharesReceived_) {
        require(_investmentAmount > 0, "__buyShares: Empty _investmentAmount");

        // Gives Extensions a chance to run logic prior to the minting of bought shares
        __preBuySharesHook(_buyer, _investmentAmount, _minSharesQuantity, _preBuySharesGav);

        // Calculate the amount of shares to issue with the investment amount
        uint256 sharesIssued = _investmentAmount.mul(SHARES_UNIT).div(_sharePrice);

        // Mint shares to the buyer
        uint256 prevBuyerShares = ERC20(_vaultProxy).balanceOf(_buyer);
        IVault(_vaultProxy).mintShares(_buyer, sharesIssued);

        // Transfer the investment asset to the fund.
        // Does not follow the checks-effects-interactions pattern, but it is preferred
        // to have the final state of the VaultProxy prior to running __postBuySharesHook().
        ERC20(_denominationAsset).safeTransferFrom(msg.sender, _vaultProxy, _investmentAmount);

        // Gives Extensions a chance to run logic after shares are issued
        __postBuySharesHook(_buyer, _investmentAmount, sharesIssued, _preBuySharesGav);

        // The number of actual shares received may differ from shares issued due to
        // how the PostBuyShares hooks are invoked by Extensions (i.e., fees)
        sharesReceived_ = ERC20(_vaultProxy).balanceOf(_buyer).sub(prevBuyerShares);
        require(
            sharesReceived_ >= _minSharesQuantity,
            "__buyShares: Shares received < _minSharesQuantity"
        );

        emit SharesBought(msg.sender, _buyer, _investmentAmount, sharesIssued, sharesReceived_);

        return sharesReceived_;
    }

    /// @dev Helper for Extension actions after all __buyShares() calls are made
    function __buySharesCompletedHook(
        address _caller,
        uint256[] memory _sharesReceivedAmounts,
        uint256 _gav
    ) private {
        IPolicyManager(POLICY_MANAGER).validatePolicies(
            address(this),
            IPolicyManager.PolicyHook.BuySharesCompleted,
            abi.encode(_caller, _sharesReceivedAmounts, _gav)
        );

        IFeeManager(FEE_MANAGER).invokeHook(
            IFeeManager.FeeHook.BuySharesCompleted,
            abi.encode(_caller, _sharesReceivedAmounts),
            _gav
        );
    }

    /// @dev Helper for Extension actions before any __buyShares() calls are made
    function __buySharesSetupHook(
        address _caller,
        uint256[] memory _investmentAmounts,
        uint256 _gav
    ) private {
        IPolicyManager(POLICY_MANAGER).validatePolicies(
            address(this),
            IPolicyManager.PolicyHook.BuySharesSetup,
            abi.encode(_caller, _investmentAmounts, _gav)
        );

        IFeeManager(FEE_MANAGER).invokeHook(
            IFeeManager.FeeHook.BuySharesSetup,
            abi.encode(_caller, _investmentAmounts),
            _gav
        );
    }

    /// @dev Helper for Extension actions immediately prior to issuing shares.
    /// This could be cleaned up so both Extensions take the same encoded args and handle GAV
    /// in the same way, but there is not the obvious need for gas savings of recycling
    /// the GAV value for the current policies as there is for the fees.
    function __preBuySharesHook(
        address _buyer,
        uint256 _investmentAmount,
        uint256 _minSharesQuantity,
        uint256 _gav
    ) private {
        IFeeManager(FEE_MANAGER).invokeHook(
            IFeeManager.FeeHook.PreBuyShares,
            abi.encode(_buyer, _investmentAmount, _minSharesQuantity),
            _gav
        );

        IPolicyManager(POLICY_MANAGER).validatePolicies(
            address(this),
            IPolicyManager.PolicyHook.PreBuyShares,
            abi.encode(_buyer, _investmentAmount, _minSharesQuantity, _gav)
        );
    }

    /// @dev Helper for Extension actions immediately after issuing shares.
    /// Same comment applies from __preBuySharesHook() above.
    function __postBuySharesHook(
        address _buyer,
        uint256 _investmentAmount,
        uint256 _sharesIssued,
        uint256 _preBuySharesGav
    ) private {
        uint256 gav = _preBuySharesGav.add(_investmentAmount);
        IFeeManager(FEE_MANAGER).invokeHook(
            IFeeManager.FeeHook.PostBuyShares,
            abi.encode(_buyer, _investmentAmount, _sharesIssued),
            gav
        );

        IPolicyManager(POLICY_MANAGER).validatePolicies(
            address(this),
            IPolicyManager.PolicyHook.PostBuyShares,
            abi.encode(_buyer, _investmentAmount, _sharesIssued, gav)
        );
    }

    // REDEEM SHARES

    /// @notice Redeem all of the sender's shares for a proportionate slice of the fund's assets
    /// @return payoutAssets_ The assets paid out to the redeemer
    /// @return payoutAmounts_ The amount of each asset paid out to the redeemer
    /// @dev See __redeemShares() for further detail
    function redeemShares()
        external
        returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_)
    {
        return
            __redeemShares(
                msg.sender,
                ERC20(vaultProxy).balanceOf(msg.sender),
                new address[](0),
                new address[](0)
            );
    }

    /// @notice Redeem a specified quantity of the sender's shares for a proportionate slice of
    /// the fund's assets, optionally specifying additional assets and assets to skip.
    /// @param _sharesQuantity The quantity of shares to redeem
    /// @param _additionalAssets Additional (non-tracked) assets to claim
    /// @param _assetsToSkip Tracked assets to forfeit
    /// @return payoutAssets_ The assets paid out to the redeemer
    /// @return payoutAmounts_ The amount of each asset paid out to the redeemer
    /// @dev Any claim to passed _assetsToSkip will be forfeited entirely. This should generally
    /// only be exercised if a bad asset is causing redemption to fail.
    function redeemSharesDetailed(
        uint256 _sharesQuantity,
        address[] calldata _additionalAssets,
        address[] calldata _assetsToSkip
    ) external returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_) {
        return __redeemShares(msg.sender, _sharesQuantity, _additionalAssets, _assetsToSkip);
    }

    /// @dev Helper to parse an array of payout assets during redemption, taking into account
    /// additional assets and assets to skip. _assetsToSkip ignores _additionalAssets.
    /// All input arrays are assumed to be unique.
    function __parseRedemptionPayoutAssets(
        address[] memory _trackedAssets,
        address[] memory _additionalAssets,
        address[] memory _assetsToSkip
    ) private pure returns (address[] memory payoutAssets_) {
        address[] memory trackedAssetsToPayout = _trackedAssets.removeItems(_assetsToSkip);
        if (_additionalAssets.length == 0) {
            return trackedAssetsToPayout;
        }

        // Add additional assets. Duplicates of trackedAssets are ignored.
        bool[] memory indexesToAdd = new bool[](_additionalAssets.length);
        uint256 additionalItemsCount;
        for (uint256 i; i < _additionalAssets.length; i++) {
            if (!trackedAssetsToPayout.contains(_additionalAssets[i])) {
                indexesToAdd[i] = true;
                additionalItemsCount++;
            }
        }
        if (additionalItemsCount == 0) {
            return trackedAssetsToPayout;
        }

        payoutAssets_ = new address[](trackedAssetsToPayout.length.add(additionalItemsCount));
        for (uint256 i; i < trackedAssetsToPayout.length; i++) {
            payoutAssets_[i] = trackedAssetsToPayout[i];
        }
        uint256 payoutAssetsIndex = trackedAssetsToPayout.length;
        for (uint256 i; i < _additionalAssets.length; i++) {
            if (indexesToAdd[i]) {
                payoutAssets_[payoutAssetsIndex] = _additionalAssets[i];
                payoutAssetsIndex++;
            }
        }

        return payoutAssets_;
    }

    /// @dev Helper for system actions immediately prior to redeeming shares.
    /// Policy validation is not currently allowed on redemption, to ensure continuous redeemability.
    function __preRedeemSharesHook(address _redeemer, uint256 _sharesQuantity)
        private
        allowsPermissionedVaultAction
    {
        try
            IFeeManager(FEE_MANAGER).invokeHook(
                IFeeManager.FeeHook.PreRedeemShares,
                abi.encode(_redeemer, _sharesQuantity),
                0
            )
         {} catch (bytes memory reason) {
            emit PreRedeemSharesHookFailed(reason, _redeemer, _sharesQuantity);
        }
    }

    /// @dev Helper to redeem shares.
    /// This function should never fail without a way to bypass the failure, which is assured
    /// through two mechanisms:
    /// 1. The FeeManager is called with the try/catch pattern to assure that calls to it
    /// can never block redemption.
    /// 2. If a token fails upon transfer(), that token can be skipped (and its balance forfeited)
    /// by explicitly specifying _assetsToSkip.
    /// Because of these assurances, shares should always be redeemable, with the exception
    /// of the timelock period on shares actions that must be respected.
    function __redeemShares(
        address _redeemer,
        uint256 _sharesQuantity,
        address[] memory _additionalAssets,
        address[] memory _assetsToSkip
    )
        private
        locksReentrance
        returns (address[] memory payoutAssets_, uint256[] memory payoutAmounts_)
    {
        require(_sharesQuantity > 0, "__redeemShares: _sharesQuantity must be >0");
        require(
            _additionalAssets.isUniqueSet(),
            "__redeemShares: _additionalAssets contains duplicates"
        );
        require(_assetsToSkip.isUniqueSet(), "__redeemShares: _assetsToSkip contains duplicates");

        IVault vaultProxyContract = IVault(vaultProxy);

        // Only apply the sharesActionTimelock when a migration is not pending
        if (!IDispatcher(DISPATCHER).hasMigrationRequest(address(vaultProxyContract))) {
            __assertSharesActionNotTimelocked(_redeemer);
            acctToLastSharesAction[_redeemer] = block.timestamp;
        }

        // When a fund is paused, settling fees will be skipped
        if (!__fundIsPaused()) {
            // Note that if a fee with `SettlementType.Direct` is charged here (i.e., not `Mint`),
            // then those fee shares will be transferred from the user's balance rather
            // than reallocated from the sharesQuantity being redeemed.
            __preRedeemSharesHook(_redeemer, _sharesQuantity);
        }

        // Check the shares quantity against the user's balance after settling fees
        ERC20 sharesContract = ERC20(address(vaultProxyContract));
        require(
            _sharesQuantity <= sharesContract.balanceOf(_redeemer),
            "__redeemShares: Insufficient shares"
        );

        // Parse the payout assets given optional params to add or skip assets.
        // Note that there is no validation that the _additionalAssets are known assets to
        // the protocol. This means that the redeemer could specify a malicious asset,
        // but since all state-changing, user-callable functions on this contract share the
        // non-reentrant modifier, there is nowhere to perform a reentrancy attack.
        payoutAssets_ = __parseRedemptionPayoutAssets(
            vaultProxyContract.getTrackedAssets(),
            _additionalAssets,
            _assetsToSkip
        );
        require(payoutAssets_.length > 0, "__redeemShares: No payout assets");

        // Destroy the shares.
        // Must get the shares supply before doing so.
        uint256 sharesSupply = sharesContract.totalSupply();
        vaultProxyContract.burnShares(_redeemer, _sharesQuantity);

        // Calculate and transfer payout asset amounts due to redeemer
        payoutAmounts_ = new uint256[](payoutAssets_.length);
        address denominationAssetCopy = denominationAsset;
        for (uint256 i; i < payoutAssets_.length; i++) {
            uint256 assetBalance = __finalizeIfSynthAndGetAssetBalance(
                address(vaultProxyContract),
                payoutAssets_[i],
                true
            );

            // If all remaining shares are being redeemed, the logic changes slightly
            if (_sharesQuantity == sharesSupply) {
                payoutAmounts_[i] = assetBalance;
                // Remove every tracked asset, except the denomination asset
                if (payoutAssets_[i] != denominationAssetCopy) {
                    vaultProxyContract.removeTrackedAsset(payoutAssets_[i]);
                }
            } else {
                payoutAmounts_[i] = assetBalance.mul(_sharesQuantity).div(sharesSupply);
            }

            // Transfer payout asset to redeemer
            if (payoutAmounts_[i] > 0) {
                vaultProxyContract.withdrawAssetTo(payoutAssets_[i], _redeemer, payoutAmounts_[i]);
            }
        }

        emit SharesRedeemed(_redeemer, _sharesQuantity, payoutAssets_, payoutAmounts_);

        return (payoutAssets_, payoutAmounts_);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `denominationAsset` variable
    /// @return denominationAsset_ The `denominationAsset` variable value
    function getDenominationAsset() external view override returns (address denominationAsset_) {
        return denominationAsset;
    }

    /// @notice Gets the routes for the various contracts used by all funds
    /// @return dispatcher_ The `DISPATCHER` variable value
    /// @return feeManager_ The `FEE_MANAGER` variable value
    /// @return fundDeployer_ The `FUND_DEPLOYER` variable value
    /// @return integrationManager_ The `INTEGRATION_MANAGER` variable value
    /// @return policyManager_ The `POLICY_MANAGER` variable value
    /// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
    /// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
    function getLibRoutes()
        external
        view
        returns (
            address dispatcher_,
            address feeManager_,
            address fundDeployer_,
            address integrationManager_,
            address policyManager_,
            address primitivePriceFeed_,
            address valueInterpreter_
        )
    {
        return (
            DISPATCHER,
            FEE_MANAGER,
            FUND_DEPLOYER,
            INTEGRATION_MANAGER,
            POLICY_MANAGER,
            PRIMITIVE_PRICE_FEED,
            VALUE_INTERPRETER
        );
    }

    /// @notice Gets the `overridePause` variable
    /// @return overridePause_ The `overridePause` variable value
    function getOverridePause() external view returns (bool overridePause_) {
        return overridePause;
    }

    /// @notice Gets the `sharesActionTimelock` variable
    /// @return sharesActionTimelock_ The `sharesActionTimelock` variable value
    function getSharesActionTimelock() external view returns (uint256 sharesActionTimelock_) {
        return sharesActionTimelock;
    }

    /// @notice Gets the `vaultProxy` variable
    /// @return vaultProxy_ The `vaultProxy` variable value
    function getVaultProxy() external view override returns (address vaultProxy_) {
        return vaultProxy;
    }
}

File 32 of 138 : VaultLib.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../../../persistent/dispatcher/IDispatcher.sol";
import "../../../../persistent/vault/VaultLibBase1.sol";
import "./IVault.sol";

/// @title VaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice The per-release proxiable library contract for VaultProxy
/// @dev The difference in terminology between "asset" and "trackedAsset" is intentional.
/// A fund might actually have asset balances of un-tracked assets,
/// but only tracked assets are used in gav calculations.
/// Note that this contract inherits VaultLibSafeMath (a verbatim Open Zeppelin SafeMath copy)
/// from SharesTokenBase via VaultLibBase1
contract VaultLib is VaultLibBase1, IVault {
    using SafeERC20 for ERC20;

    // Before updating TRACKED_ASSETS_LIMIT in the future, it is important to consider:
    // 1. The highest tracked assets limit ever allowed in the protocol
    // 2. That the next value will need to be respected by all future releases
    uint256 private constant TRACKED_ASSETS_LIMIT = 20;

    modifier onlyAccessor() {
        require(msg.sender == accessor, "Only the designated accessor can make this call");
        _;
    }

    /////////////
    // GENERAL //
    /////////////

    /// @notice Sets the account that is allowed to migrate a fund to new releases
    /// @param _nextMigrator The account to set as the allowed migrator
    /// @dev Set to address(0) to remove the migrator.
    function setMigrator(address _nextMigrator) external {
        require(msg.sender == owner, "setMigrator: Only the owner can call this function");
        address prevMigrator = migrator;
        require(_nextMigrator != prevMigrator, "setMigrator: Value already set");

        migrator = _nextMigrator;

        emit MigratorSet(prevMigrator, _nextMigrator);
    }

    ///////////
    // VAULT //
    ///////////

    /// @notice Adds a tracked asset to the fund
    /// @param _asset The asset to add
    /// @dev Allows addition of already tracked assets to fail silently.
    function addTrackedAsset(address _asset) external override onlyAccessor {
        if (!isTrackedAsset(_asset)) {
            require(
                trackedAssets.length < TRACKED_ASSETS_LIMIT,
                "addTrackedAsset: Limit exceeded"
            );

            assetToIsTracked[_asset] = true;
            trackedAssets.push(_asset);

            emit TrackedAssetAdded(_asset);
        }
    }

    /// @notice Grants an allowance to a spender to use the fund's asset
    /// @param _asset The asset for which to grant an allowance
    /// @param _target The spender of the allowance
    /// @param _amount The amount of the allowance
    function approveAssetSpender(
        address _asset,
        address _target,
        uint256 _amount
    ) external override onlyAccessor {
        ERC20(_asset).approve(_target, _amount);
    }

    /// @notice Makes an arbitrary call with this contract as the sender
    /// @param _contract The contract to call
    /// @param _callData The call data for the call
    function callOnContract(address _contract, bytes calldata _callData)
        external
        override
        onlyAccessor
    {
        (bool success, bytes memory returnData) = _contract.call(_callData);
        require(success, string(returnData));
    }

    /// @notice Removes a tracked asset from the fund
    /// @param _asset The asset to remove
    function removeTrackedAsset(address _asset) external override onlyAccessor {
        __removeTrackedAsset(_asset);
    }

    /// @notice Withdraws an asset from the VaultProxy to a given account
    /// @param _asset The asset to withdraw
    /// @param _target The account to which to withdraw the asset
    /// @param _amount The amount of asset to withdraw
    function withdrawAssetTo(
        address _asset,
        address _target,
        uint256 _amount
    ) external override onlyAccessor {
        ERC20(_asset).safeTransfer(_target, _amount);

        emit AssetWithdrawn(_asset, _target, _amount);
    }

    /// @dev Helper to the get the Vault's balance of a given asset
    function __getAssetBalance(address _asset) private view returns (uint256 balance_) {
        return ERC20(_asset).balanceOf(address(this));
    }

    /// @dev Helper to remove an asset from a fund's tracked assets.
    /// Allows removal of non-tracked asset to fail silently.
    function __removeTrackedAsset(address _asset) private {
        if (isTrackedAsset(_asset)) {
            assetToIsTracked[_asset] = false;

            uint256 trackedAssetsCount = trackedAssets.length;
            for (uint256 i = 0; i < trackedAssetsCount; i++) {
                if (trackedAssets[i] == _asset) {
                    if (i < trackedAssetsCount - 1) {
                        trackedAssets[i] = trackedAssets[trackedAssetsCount - 1];
                    }
                    trackedAssets.pop();
                    break;
                }
            }

            emit TrackedAssetRemoved(_asset);
        }
    }

    ////////////
    // SHARES //
    ////////////

    /// @notice Burns fund shares from a particular account
    /// @param _target The account for which to burn shares
    /// @param _amount The amount of shares to burn
    function burnShares(address _target, uint256 _amount) external override onlyAccessor {
        __burn(_target, _amount);
    }

    /// @notice Mints fund shares to a particular account
    /// @param _target The account for which to burn shares
    /// @param _amount The amount of shares to mint
    function mintShares(address _target, uint256 _amount) external override onlyAccessor {
        __mint(_target, _amount);
    }

    /// @notice Transfers fund shares from one account to another
    /// @param _from The account from which to transfer shares
    /// @param _to The account to which to transfer shares
    /// @param _amount The amount of shares to transfer
    function transferShares(
        address _from,
        address _to,
        uint256 _amount
    ) external override onlyAccessor {
        __transfer(_from, _to, _amount);
    }

    // ERC20 overrides

    /// @dev Disallows the standard ERC20 approve() function
    function approve(address, uint256) public override returns (bool) {
        revert("Unimplemented");
    }

    /// @notice Gets the `symbol` value of the shares token
    /// @return symbol_ The `symbol` value
    /// @dev Defers the shares symbol value to the Dispatcher contract
    function symbol() public view override returns (string memory symbol_) {
        return IDispatcher(creator).getSharesTokenSymbol();
    }

    /// @dev Disallows the standard ERC20 transfer() function
    function transfer(address, uint256) public override returns (bool) {
        revert("Unimplemented");
    }

    /// @dev Disallows the standard ERC20 transferFrom() function
    function transferFrom(
        address,
        address,
        uint256
    ) public override returns (bool) {
        revert("Unimplemented");
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `accessor` variable
    /// @return accessor_ The `accessor` variable value
    function getAccessor() external view override returns (address accessor_) {
        return accessor;
    }

    /// @notice Gets the `creator` variable
    /// @return creator_ The `creator` variable value
    function getCreator() external view returns (address creator_) {
        return creator;
    }

    /// @notice Gets the `migrator` variable
    /// @return migrator_ The `migrator` variable value
    function getMigrator() external view returns (address migrator_) {
        return migrator;
    }

    /// @notice Gets the `owner` variable
    /// @return owner_ The `owner` variable value
    function getOwner() external view override returns (address owner_) {
        return owner;
    }

    /// @notice Gets the `trackedAssets` variable
    /// @return trackedAssets_ The `trackedAssets` variable value
    function getTrackedAssets() external view override returns (address[] memory trackedAssets_) {
        return trackedAssets;
    }

    /// @notice Check whether an address is a tracked asset of the fund
    /// @param _asset The address to check
    /// @return isTrackedAsset_ True if the address is a tracked asset of the fund
    function isTrackedAsset(address _asset) public view override returns (bool isTrackedAsset_) {
        return assetToIsTracked[_asset];
    }
}

File 33 of 138 : ValueInterpreter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../price-feeds/derivatives/IAggregatedDerivativePriceFeed.sol";
import "../price-feeds/derivatives/IDerivativePriceFeed.sol";
import "../price-feeds/primitives/IPrimitivePriceFeed.sol";
import "./IValueInterpreter.sol";

/// @title ValueInterpreter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Interprets price feeds to provide covert value between asset pairs
/// @dev This contract contains several "live" value calculations, which for this release are simply
/// aliases to their "canonical" value counterparts since the only primitive price feed (Chainlink)
/// is immutable in this contract and only has one type of value. Including the "live" versions of
/// functions only serves as a placeholder for infrastructural components and plugins (e.g., policies)
/// to explicitly define the types of values that they should (and will) be using in a future release.
contract ValueInterpreter is IValueInterpreter {
    using SafeMath for uint256;

    address private immutable AGGREGATED_DERIVATIVE_PRICE_FEED;
    address private immutable PRIMITIVE_PRICE_FEED;

    constructor(address _primitivePriceFeed, address _aggregatedDerivativePriceFeed) public {
        AGGREGATED_DERIVATIVE_PRICE_FEED = _aggregatedDerivativePriceFeed;
        PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
    }

    // EXTERNAL FUNCTIONS

    /// @notice An alias of calcCanonicalAssetsTotalValue
    function calcLiveAssetsTotalValue(
        address[] calldata _baseAssets,
        uint256[] calldata _amounts,
        address _quoteAsset
    ) external override returns (uint256 value_, bool isValid_) {
        return calcCanonicalAssetsTotalValue(_baseAssets, _amounts, _quoteAsset);
    }

    /// @notice An alias of calcCanonicalAssetValue
    function calcLiveAssetValue(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset
    ) external override returns (uint256 value_, bool isValid_) {
        return calcCanonicalAssetValue(_baseAsset, _amount, _quoteAsset);
    }

    // PUBLIC FUNCTIONS

    /// @notice Calculates the total value of given amounts of assets in a single quote asset
    /// @param _baseAssets The assets to convert
    /// @param _amounts The amounts of the _baseAssets to convert
    /// @param _quoteAsset The asset to which to convert
    /// @return value_ The sum value of _baseAssets, denominated in the _quoteAsset
    /// @return isValid_ True if the price feed rates used to derive value are all valid
    /// @dev Does not alter protocol state,
    /// but not a view because calls to price feeds can potentially update third party state
    function calcCanonicalAssetsTotalValue(
        address[] memory _baseAssets,
        uint256[] memory _amounts,
        address _quoteAsset
    ) public override returns (uint256 value_, bool isValid_) {
        require(
            _baseAssets.length == _amounts.length,
            "calcCanonicalAssetsTotalValue: Arrays unequal lengths"
        );
        require(
            IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_quoteAsset),
            "calcCanonicalAssetsTotalValue: Unsupported _quoteAsset"
        );

        isValid_ = true;
        for (uint256 i; i < _baseAssets.length; i++) {
            (uint256 assetValue, bool assetValueIsValid) = __calcAssetValue(
                _baseAssets[i],
                _amounts[i],
                _quoteAsset
            );
            value_ = value_.add(assetValue);
            if (!assetValueIsValid) {
                isValid_ = false;
            }
        }

        return (value_, isValid_);
    }

    /// @notice Calculates the value of a given amount of one asset in terms of another asset
    /// @param _baseAsset The asset from which to convert
    /// @param _amount The amount of the _baseAsset to convert
    /// @param _quoteAsset The asset to which to convert
    /// @return value_ The equivalent quantity in the _quoteAsset
    /// @return isValid_ True if the price feed rates used to derive value are all valid
    /// @dev Does not alter protocol state,
    /// but not a view because calls to price feeds can potentially update third party state
    function calcCanonicalAssetValue(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset
    ) public override returns (uint256 value_, bool isValid_) {
        if (_baseAsset == _quoteAsset || _amount == 0) {
            return (_amount, true);
        }

        require(
            IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_quoteAsset),
            "calcCanonicalAssetValue: Unsupported _quoteAsset"
        );

        return __calcAssetValue(_baseAsset, _amount, _quoteAsset);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to differentially calculate an asset value
    /// based on if it is a primitive or derivative asset.
    function __calcAssetValue(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset
    ) private returns (uint256 value_, bool isValid_) {
        if (_baseAsset == _quoteAsset || _amount == 0) {
            return (_amount, true);
        }

        // Handle case that asset is a primitive
        if (IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_baseAsset)) {
            return
                IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).calcCanonicalValue(
                    _baseAsset,
                    _amount,
                    _quoteAsset
                );
        }

        // Handle case that asset is a derivative
        address derivativePriceFeed = IAggregatedDerivativePriceFeed(
            AGGREGATED_DERIVATIVE_PRICE_FEED
        )
            .getPriceFeedForDerivative(_baseAsset);
        if (derivativePriceFeed != address(0)) {
            return __calcDerivativeValue(derivativePriceFeed, _baseAsset, _amount, _quoteAsset);
        }

        revert("__calcAssetValue: Unsupported _baseAsset");
    }

    /// @dev Helper to calculate the value of a derivative in an arbitrary asset.
    /// Handles multiple underlying assets (e.g., Uniswap and Balancer pool tokens).
    /// Handles underlying assets that are also derivatives (e.g., a cDAI-ETH LP)
    function __calcDerivativeValue(
        address _derivativePriceFeed,
        address _derivative,
        uint256 _amount,
        address _quoteAsset
    ) private returns (uint256 value_, bool isValid_) {
        (address[] memory underlyings, uint256[] memory underlyingAmounts) = IDerivativePriceFeed(
            _derivativePriceFeed
        )
            .calcUnderlyingValues(_derivative, _amount);

        require(underlyings.length > 0, "__calcDerivativeValue: No underlyings");
        require(
            underlyings.length == underlyingAmounts.length,
            "__calcDerivativeValue: Arrays unequal lengths"
        );

        // Let validity be negated if any of the underlying value calculations are invalid
        isValid_ = true;
        for (uint256 i = 0; i < underlyings.length; i++) {
            (uint256 underlyingValue, bool underlyingValueIsValid) = __calcAssetValue(
                underlyings[i],
                underlyingAmounts[i],
                _quoteAsset
            );

            if (!underlyingValueIsValid) {
                isValid_ = false;
            }
            value_ = value_.add(underlyingValue);
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `AGGREGATED_DERIVATIVE_PRICE_FEED` variable
    /// @return aggregatedDerivativePriceFeed_ The `AGGREGATED_DERIVATIVE_PRICE_FEED` variable value
    function getAggregatedDerivativePriceFeed()
        external
        view
        returns (address aggregatedDerivativePriceFeed_)
    {
        return AGGREGATED_DERIVATIVE_PRICE_FEED;
    }

    /// @notice Gets the `PRIMITIVE_PRICE_FEED` variable
    /// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
    function getPrimitivePriceFeed() external view returns (address primitivePriceFeed_) {
        return PRIMITIVE_PRICE_FEED;
    }
}

File 34 of 138 : IDispatcher.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IDispatcher Interface
/// @author Enzyme Council <[email protected]>
interface IDispatcher {
    function cancelMigration(address _vaultProxy, bool _bypassFailure) external;

    function claimOwnership() external;

    function deployVaultProxy(
        address _vaultLib,
        address _owner,
        address _vaultAccessor,
        string calldata _fundName
    ) external returns (address vaultProxy_);

    function executeMigration(address _vaultProxy, bool _bypassFailure) external;

    function getCurrentFundDeployer() external view returns (address currentFundDeployer_);

    function getFundDeployerForVaultProxy(address _vaultProxy)
        external
        view
        returns (address fundDeployer_);

    function getMigrationRequestDetailsForVaultProxy(address _vaultProxy)
        external
        view
        returns (
            address nextFundDeployer_,
            address nextVaultAccessor_,
            address nextVaultLib_,
            uint256 executableTimestamp_
        );

    function getMigrationTimelock() external view returns (uint256 migrationTimelock_);

    function getNominatedOwner() external view returns (address nominatedOwner_);

    function getOwner() external view returns (address owner_);

    function getSharesTokenSymbol() external view returns (string memory sharesTokenSymbol_);

    function getTimelockRemainingForMigrationRequest(address _vaultProxy)
        external
        view
        returns (uint256 secondsRemaining_);

    function hasExecutableMigrationRequest(address _vaultProxy)
        external
        view
        returns (bool hasExecutableRequest_);

    function hasMigrationRequest(address _vaultProxy)
        external
        view
        returns (bool hasMigrationRequest_);

    function removeNominatedOwner() external;

    function setCurrentFundDeployer(address _nextFundDeployer) external;

    function setMigrationTimelock(uint256 _nextTimelock) external;

    function setNominatedOwner(address _nextNominatedOwner) external;

    function setSharesTokenSymbol(string calldata _nextSymbol) external;

    function signalMigration(
        address _vaultProxy,
        address _nextVaultAccessor,
        address _nextVaultLib,
        bool _bypassFailure
    ) external;
}

File 35 of 138 : IFeeManager.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

/// @title FeeManager Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for the FeeManager
interface IFeeManager {
    // No fees for the current release are implemented post-redeemShares
    enum FeeHook {
        Continuous,
        BuySharesSetup,
        PreBuyShares,
        PostBuyShares,
        BuySharesCompleted,
        PreRedeemShares
    }
    enum SettlementType {None, Direct, Mint, Burn, MintSharesOutstanding, BurnSharesOutstanding}

    function invokeHook(
        FeeHook,
        bytes calldata,
        uint256
    ) external;
}

File 36 of 138 : IPrimitivePriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IPrimitivePriceFeed Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for primitive price feeds
interface IPrimitivePriceFeed {
    function calcCanonicalValue(
        address,
        uint256,
        address
    ) external view returns (uint256, bool);

    function calcLiveValue(
        address,
        uint256,
        address
    ) external view returns (uint256, bool);

    function isSupportedAsset(address) external view returns (bool);
}

File 37 of 138 : IValueInterpreter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IValueInterpreter interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for ValueInterpreter
interface IValueInterpreter {
    function calcCanonicalAssetValue(
        address,
        uint256,
        address
    ) external returns (uint256, bool);

    function calcCanonicalAssetsTotalValue(
        address[] calldata,
        uint256[] calldata,
        address
    ) external returns (uint256, bool);

    function calcLiveAssetValue(
        address,
        uint256,
        address
    ) external returns (uint256, bool);

    function calcLiveAssetsTotalValue(
        address[] calldata,
        uint256[] calldata,
        address
    ) external returns (uint256, bool);
}

File 38 of 138 : AssetFinalityResolver.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../infrastructure/price-feeds/derivatives/feeds/SynthetixPriceFeed.sol";
import "../interfaces/ISynthetixAddressResolver.sol";
import "../interfaces/ISynthetixExchanger.sol";

/// @title AssetFinalityResolver Contract
/// @author Enzyme Council <[email protected]>
/// @notice A contract that helps achieve asset finality
abstract contract AssetFinalityResolver {
    address internal immutable SYNTHETIX_ADDRESS_RESOLVER;
    address internal immutable SYNTHETIX_PRICE_FEED;

    constructor(address _synthetixPriceFeed, address _synthetixAddressResolver) public {
        SYNTHETIX_ADDRESS_RESOLVER = _synthetixAddressResolver;
        SYNTHETIX_PRICE_FEED = _synthetixPriceFeed;
    }

    /// @dev Helper to finalize a Synth balance at a given target address and return its balance
    function __finalizeIfSynthAndGetAssetBalance(
        address _target,
        address _asset,
        bool _requireFinality
    ) internal returns (uint256 assetBalance_) {
        bytes32 currencyKey = SynthetixPriceFeed(SYNTHETIX_PRICE_FEED).getCurrencyKeyForSynth(
            _asset
        );
        if (currencyKey != 0) {
            address synthetixExchanger = ISynthetixAddressResolver(SYNTHETIX_ADDRESS_RESOLVER)
                .requireAndGetAddress(
                "Exchanger",
                "finalizeAndGetAssetBalance: Missing Exchanger"
            );
            try ISynthetixExchanger(synthetixExchanger).settle(_target, currencyKey)  {} catch {
                require(!_requireFinality, "finalizeAndGetAssetBalance: Cannot settle Synth");
            }
        }

        return ERC20(_asset).balanceOf(_target);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `SYNTHETIX_ADDRESS_RESOLVER` variable
    /// @return synthetixAddressResolver_ The `SYNTHETIX_ADDRESS_RESOLVER` variable value
    function getSynthetixAddressResolver()
        external
        view
        returns (address synthetixAddressResolver_)
    {
        return SYNTHETIX_ADDRESS_RESOLVER;
    }

    /// @notice Gets the `SYNTHETIX_PRICE_FEED` variable
    /// @return synthetixPriceFeed_ The `SYNTHETIX_PRICE_FEED` variable value
    function getSynthetixPriceFeed() external view returns (address synthetixPriceFeed_) {
        return SYNTHETIX_PRICE_FEED;
    }
}

File 39 of 138 : SynthetixPriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/ISynthetix.sol";
import "../../../../interfaces/ISynthetixAddressResolver.sol";
import "../../../../interfaces/ISynthetixExchangeRates.sol";
import "../../../../interfaces/ISynthetixProxyERC20.sol";
import "../../../../interfaces/ISynthetixSynth.sol";
import "../../../utils/DispatcherOwnerMixin.sol";
import "../IDerivativePriceFeed.sol";

/// @title SynthetixPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice A price feed that uses Synthetix oracles as price sources
contract SynthetixPriceFeed is IDerivativePriceFeed, DispatcherOwnerMixin {
    using SafeMath for uint256;

    event SynthAdded(address indexed synth, bytes32 currencyKey);

    event SynthCurrencyKeyUpdated(
        address indexed synth,
        bytes32 prevCurrencyKey,
        bytes32 nextCurrencyKey
    );

    uint256 private constant SYNTH_UNIT = 10**18;
    address private immutable ADDRESS_RESOLVER;
    address private immutable SUSD;

    mapping(address => bytes32) private synthToCurrencyKey;

    constructor(
        address _dispatcher,
        address _addressResolver,
        address _sUSD,
        address[] memory _synths
    ) public DispatcherOwnerMixin(_dispatcher) {
        ADDRESS_RESOLVER = _addressResolver;
        SUSD = _sUSD;

        address[] memory sUSDSynths = new address[](1);
        sUSDSynths[0] = _sUSD;

        __addSynths(sUSDSynths);
        __addSynths(_synths);
    }

    /// @notice Converts a given amount of a derivative to its underlying asset values
    /// @param _derivative The derivative to convert
    /// @param _derivativeAmount The amount of the derivative to convert
    /// @return underlyings_ The underlying assets for the _derivative
    /// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
    function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
        external
        override
        returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
    {
        underlyings_ = new address[](1);
        underlyings_[0] = SUSD;
        underlyingAmounts_ = new uint256[](1);

        bytes32 currencyKey = getCurrencyKeyForSynth(_derivative);
        require(currencyKey != 0, "calcUnderlyingValues: _derivative is not supported");

        address exchangeRates = ISynthetixAddressResolver(ADDRESS_RESOLVER).requireAndGetAddress(
            "ExchangeRates",
            "calcUnderlyingValues: Missing ExchangeRates"
        );

        (uint256 rate, bool isInvalid) = ISynthetixExchangeRates(exchangeRates).rateAndInvalid(
            currencyKey
        );
        require(!isInvalid, "calcUnderlyingValues: _derivative rate is not valid");

        underlyingAmounts_[0] = _derivativeAmount.mul(rate).div(SYNTH_UNIT);

        return (underlyings_, underlyingAmounts_);
    }

    /// @notice Checks whether an asset is a supported primitive of the price feed
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is a supported primitive
    function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
        return getCurrencyKeyForSynth(_asset) != 0;
    }

    /////////////////////
    // SYNTHS REGISTRY //
    /////////////////////

    /// @notice Adds Synths to the price feed
    /// @param _synths Synths to add
    function addSynths(address[] calldata _synths) external onlyDispatcherOwner {
        require(_synths.length > 0, "addSynths: Empty _synths");

        __addSynths(_synths);
    }

    /// @notice Updates the cached currencyKey value for specified Synths
    /// @param _synths Synths to update
    /// @dev Anybody can call this function
    function updateSynthCurrencyKeys(address[] calldata _synths) external {
        require(_synths.length > 0, "updateSynthCurrencyKeys: Empty _synths");

        for (uint256 i; i < _synths.length; i++) {
            bytes32 prevCurrencyKey = synthToCurrencyKey[_synths[i]];
            require(prevCurrencyKey != 0, "updateSynthCurrencyKeys: Synth not set");

            bytes32 nextCurrencyKey = __getCurrencyKey(_synths[i]);
            require(
                nextCurrencyKey != prevCurrencyKey,
                "updateSynthCurrencyKeys: Synth has correct currencyKey"
            );

            synthToCurrencyKey[_synths[i]] = nextCurrencyKey;

            emit SynthCurrencyKeyUpdated(_synths[i], prevCurrencyKey, nextCurrencyKey);
        }
    }

    /// @dev Helper to add Synths
    function __addSynths(address[] memory _synths) private {
        for (uint256 i; i < _synths.length; i++) {
            require(synthToCurrencyKey[_synths[i]] == 0, "__addSynths: Value already set");

            bytes32 currencyKey = __getCurrencyKey(_synths[i]);
            require(currencyKey != 0, "__addSynths: No currencyKey");

            synthToCurrencyKey[_synths[i]] = currencyKey;

            emit SynthAdded(_synths[i], currencyKey);
        }
    }

    /// @dev Helper to query a currencyKey from Synthetix
    function __getCurrencyKey(address _synthProxy) private view returns (bytes32 currencyKey_) {
        return ISynthetixSynth(ISynthetixProxyERC20(_synthProxy).target()).currencyKey();
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `ADDRESS_RESOLVER` variable
    /// @return addressResolver_ The `ADDRESS_RESOLVER` variable value
    function getAddressResolver() external view returns (address) {
        return ADDRESS_RESOLVER;
    }

    /// @notice Gets the currencyKey for multiple given Synths
    /// @return currencyKeys_ The currencyKey values
    function getCurrencyKeysForSynths(address[] calldata _synths)
        external
        view
        returns (bytes32[] memory currencyKeys_)
    {
        currencyKeys_ = new bytes32[](_synths.length);
        for (uint256 i; i < _synths.length; i++) {
            currencyKeys_[i] = synthToCurrencyKey[_synths[i]];
        }

        return currencyKeys_;
    }

    /// @notice Gets the `SUSD` variable
    /// @return susd_ The `SUSD` variable value
    function getSUSD() external view returns (address susd_) {
        return SUSD;
    }

    /// @notice Gets the currencyKey for a given Synth
    /// @return currencyKey_ The currencyKey value
    function getCurrencyKeyForSynth(address _synth) public view returns (bytes32 currencyKey_) {
        return synthToCurrencyKey[_synth];
    }
}

File 40 of 138 : ISynthetixAddressResolver.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title ISynthetixAddressResolver Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixAddressResolver {
    function requireAndGetAddress(bytes32, string calldata) external view returns (address);
}

File 41 of 138 : ISynthetixExchanger.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title ISynthetixExchanger Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixExchanger {
    function getAmountsForExchange(
        uint256,
        bytes32,
        bytes32
    )
        external
        view
        returns (
            uint256,
            uint256,
            uint256
        );

    function settle(address, bytes32)
        external
        returns (
            uint256,
            uint256,
            uint256
        );
}

File 42 of 138 : ISynthetix.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title ISynthetix Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetix {
    function exchangeOnBehalfWithTracking(
        address,
        bytes32,
        uint256,
        bytes32,
        address,
        bytes32
    ) external returns (uint256);
}

File 43 of 138 : ISynthetixExchangeRates.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title ISynthetixExchangeRates Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixExchangeRates {
    function rateAndInvalid(bytes32) external view returns (uint256, bool);
}

File 44 of 138 : ISynthetixProxyERC20.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title ISynthetixProxyERC20 Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixProxyERC20 {
    function target() external view returns (address);
}

File 45 of 138 : ISynthetixSynth.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title ISynthetixSynth Interface
/// @author Enzyme Council <[email protected]>
interface ISynthetixSynth {
    function currencyKey() external view returns (bytes32);
}

File 46 of 138 : DispatcherOwnerMixin.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../persistent/dispatcher/IDispatcher.sol";

/// @title DispatcherOwnerMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract that defers ownership to the owner of Dispatcher
abstract contract DispatcherOwnerMixin {
    address internal immutable DISPATCHER;

    modifier onlyDispatcherOwner() {
        require(
            msg.sender == getOwner(),
            "onlyDispatcherOwner: Only the Dispatcher owner can call this function"
        );
        _;
    }

    constructor(address _dispatcher) public {
        DISPATCHER = _dispatcher;
    }

    /// @notice Gets the owner of this contract
    /// @return owner_ The owner
    /// @dev Ownership is deferred to the owner of the Dispatcher contract
    function getOwner() public view returns (address owner_) {
        return IDispatcher(DISPATCHER).getOwner();
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `DISPATCHER` variable
    /// @return dispatcher_ The `DISPATCHER` variable value
    function getDispatcher() external view returns (address dispatcher_) {
        return DISPATCHER;
    }
}

File 47 of 138 : IDerivativePriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IDerivativePriceFeed Interface
/// @author Enzyme Council <[email protected]>
/// @notice Simple interface for derivative price source oracle implementations
interface IDerivativePriceFeed {
    function calcUnderlyingValues(address, uint256)
        external
        returns (address[] memory, uint256[] memory);

    function isSupportedAsset(address) external view returns (bool);
}

File 48 of 138 : VaultLibBase1.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./VaultLibBaseCore.sol";

/// @title VaultLibBase1 Contract
/// @author Enzyme Council <[email protected]>
/// @notice The first implementation of VaultLibBaseCore, with additional events and storage
/// @dev All subsequent implementations should inherit the previous implementation,
/// e.g., `VaultLibBase2 is VaultLibBase1`
/// DO NOT EDIT CONTRACT.
abstract contract VaultLibBase1 is VaultLibBaseCore {
    event AssetWithdrawn(address indexed asset, address indexed target, uint256 amount);

    event TrackedAssetAdded(address asset);

    event TrackedAssetRemoved(address asset);

    address[] internal trackedAssets;
    mapping(address => bool) internal assetToIsTracked;
}

File 49 of 138 : VaultLibBaseCore.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../utils/IMigratableVault.sol";
import "./utils/ProxiableVaultLib.sol";
import "./utils/SharesTokenBase.sol";

/// @title VaultLibBaseCore Contract
/// @author Enzyme Council <[email protected]>
/// @notice A persistent contract containing all required storage variables and
/// required functions for a VaultLib implementation
/// @dev DO NOT EDIT CONTRACT. If new events or storage are necessary, they should be added to
/// a numbered VaultLibBaseXXX that inherits the previous base. See VaultLibBase1.
abstract contract VaultLibBaseCore is IMigratableVault, ProxiableVaultLib, SharesTokenBase {
    event AccessorSet(address prevAccessor, address nextAccessor);

    event MigratorSet(address prevMigrator, address nextMigrator);

    event OwnerSet(address prevOwner, address nextOwner);

    event VaultLibSet(address prevVaultLib, address nextVaultLib);

    address internal accessor;
    address internal creator;
    address internal migrator;
    address internal owner;

    // EXTERNAL FUNCTIONS

    /// @notice Initializes the VaultProxy with core configuration
    /// @param _owner The address to set as the fund owner
    /// @param _accessor The address to set as the permissioned accessor of the VaultLib
    /// @param _fundName The name of the fund
    /// @dev Serves as a per-proxy pseudo-constructor
    function init(
        address _owner,
        address _accessor,
        string calldata _fundName
    ) external override {
        require(creator == address(0), "init: Proxy already initialized");
        creator = msg.sender;
        sharesName = _fundName;

        __setAccessor(_accessor);
        __setOwner(_owner);

        emit VaultLibSet(address(0), getVaultLib());
    }

    /// @notice Sets the permissioned accessor of the VaultLib
    /// @param _nextAccessor The address to set as the permissioned accessor of the VaultLib
    function setAccessor(address _nextAccessor) external override {
        require(msg.sender == creator, "setAccessor: Only callable by the contract creator");

        __setAccessor(_nextAccessor);
    }

    /// @notice Sets the VaultLib target for the VaultProxy
    /// @param _nextVaultLib The address to set as the VaultLib
    /// @dev This function is absolutely critical. __updateCodeAddress() validates that the
    /// target is a valid Proxiable contract instance.
    /// Does not block _nextVaultLib from being the same as the current VaultLib
    function setVaultLib(address _nextVaultLib) external override {
        require(msg.sender == creator, "setVaultLib: Only callable by the contract creator");

        address prevVaultLib = getVaultLib();

        __updateCodeAddress(_nextVaultLib);

        emit VaultLibSet(prevVaultLib, _nextVaultLib);
    }

    // PUBLIC FUNCTIONS

    /// @notice Checks whether an account is allowed to migrate the VaultProxy
    /// @param _who The account to check
    /// @return canMigrate_ True if the account is allowed to migrate the VaultProxy
    function canMigrate(address _who) public view virtual override returns (bool canMigrate_) {
        return _who == owner || _who == migrator;
    }

    /// @notice Gets the VaultLib target for the VaultProxy
    /// @return vaultLib_ The address of the VaultLib target
    function getVaultLib() public view returns (address vaultLib_) {
        assembly {
            // solium-disable-line
            vaultLib_ := sload(0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc)
        }
        return vaultLib_;
    }

    // INTERNAL FUNCTIONS

    /// @dev Helper to set the permissioned accessor of the VaultProxy.
    /// Does not prevent the prevAccessor from being the _nextAccessor.
    function __setAccessor(address _nextAccessor) internal {
        require(_nextAccessor != address(0), "__setAccessor: _nextAccessor cannot be empty");
        address prevAccessor = accessor;

        accessor = _nextAccessor;

        emit AccessorSet(prevAccessor, _nextAccessor);
    }

    /// @dev Helper to set the owner of the VaultProxy
    function __setOwner(address _nextOwner) internal {
        require(_nextOwner != address(0), "__setOwner: _nextOwner cannot be empty");
        address prevOwner = owner;
        require(_nextOwner != prevOwner, "__setOwner: _nextOwner is the current owner");

        owner = _nextOwner;

        emit OwnerSet(prevOwner, _nextOwner);
    }
}

File 50 of 138 : ProxiableVaultLib.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title ProxiableVaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice A contract that defines the upgrade behavior for VaultLib instances
/// @dev The recommended implementation of the target of a proxy according to EIP-1822 and EIP-1967
/// Code position in storage is `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`,
/// which is "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc".
abstract contract ProxiableVaultLib {
    /// @dev Updates the target of the proxy to be the contract at _nextVaultLib
    function __updateCodeAddress(address _nextVaultLib) internal {
        require(
            bytes32(0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5) ==
                ProxiableVaultLib(_nextVaultLib).proxiableUUID(),
            "__updateCodeAddress: _nextVaultLib not compatible"
        );
        assembly {
            // solium-disable-line
            sstore(
                0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
                _nextVaultLib
            )
        }
    }

    /// @notice Returns a unique bytes32 hash for VaultLib instances
    /// @return uuid_ The bytes32 hash representing the UUID
    /// @dev The UUID is `bytes32(keccak256('mln.proxiable.vaultlib'))`
    function proxiableUUID() public pure returns (bytes32 uuid_) {
        return 0x027b9570e9fedc1a80b937ae9a06861e5faef3992491af30b684a64b3fbec7a5;
    }
}

File 51 of 138 : SharesTokenBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./VaultLibSafeMath.sol";

/// @title StandardERC20 Contract
/// @author Enzyme Council <[email protected]>
/// @notice Contains the storage, events, and default logic of an ERC20-compliant contract.
/// @dev The logic can be overridden by VaultLib implementations.
/// Adapted from OpenZeppelin 3.2.0.
/// DO NOT EDIT THIS CONTRACT.
abstract contract SharesTokenBase {
    using VaultLibSafeMath for uint256;

    event Approval(address indexed owner, address indexed spender, uint256 value);

    event Transfer(address indexed from, address indexed to, uint256 value);

    string internal sharesName;
    string internal sharesSymbol;
    uint256 internal sharesTotalSupply;
    mapping(address => uint256) internal sharesBalances;
    mapping(address => mapping(address => uint256)) internal sharesAllowances;

    // EXTERNAL FUNCTIONS

    /// @dev Standard implementation of ERC20's approve(). Can be overridden.
    function approve(address _spender, uint256 _amount) public virtual returns (bool) {
        __approve(msg.sender, _spender, _amount);
        return true;
    }

    /// @dev Standard implementation of ERC20's transfer(). Can be overridden.
    function transfer(address _recipient, uint256 _amount) public virtual returns (bool) {
        __transfer(msg.sender, _recipient, _amount);
        return true;
    }

    /// @dev Standard implementation of ERC20's transferFrom(). Can be overridden.
    function transferFrom(
        address _sender,
        address _recipient,
        uint256 _amount
    ) public virtual returns (bool) {
        __transfer(_sender, _recipient, _amount);
        __approve(
            _sender,
            msg.sender,
            sharesAllowances[_sender][msg.sender].sub(
                _amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        return true;
    }

    // EXTERNAL FUNCTIONS - VIEW

    /// @dev Standard implementation of ERC20's allowance(). Can be overridden.
    function allowance(address _owner, address _spender) public view virtual returns (uint256) {
        return sharesAllowances[_owner][_spender];
    }

    /// @dev Standard implementation of ERC20's balanceOf(). Can be overridden.
    function balanceOf(address _account) public view virtual returns (uint256) {
        return sharesBalances[_account];
    }

    /// @dev Standard implementation of ERC20's decimals(). Can not be overridden.
    function decimals() public pure returns (uint8) {
        return 18;
    }

    /// @dev Standard implementation of ERC20's name(). Can be overridden.
    function name() public view virtual returns (string memory) {
        return sharesName;
    }

    /// @dev Standard implementation of ERC20's symbol(). Can be overridden.
    function symbol() public view virtual returns (string memory) {
        return sharesSymbol;
    }

    /// @dev Standard implementation of ERC20's totalSupply(). Can be overridden.
    function totalSupply() public view virtual returns (uint256) {
        return sharesTotalSupply;
    }

    // INTERNAL FUNCTIONS

    /// @dev Helper for approve(). Can be overridden.
    function __approve(
        address _owner,
        address _spender,
        uint256 _amount
    ) internal virtual {
        require(_owner != address(0), "ERC20: approve from the zero address");
        require(_spender != address(0), "ERC20: approve to the zero address");

        sharesAllowances[_owner][_spender] = _amount;
        emit Approval(_owner, _spender, _amount);
    }

    /// @dev Helper to burn tokens from an account. Can be overridden.
    function __burn(address _account, uint256 _amount) internal virtual {
        require(_account != address(0), "ERC20: burn from the zero address");

        sharesBalances[_account] = sharesBalances[_account].sub(
            _amount,
            "ERC20: burn amount exceeds balance"
        );
        sharesTotalSupply = sharesTotalSupply.sub(_amount);
        emit Transfer(_account, address(0), _amount);
    }

    /// @dev Helper to mint tokens to an account. Can be overridden.
    function __mint(address _account, uint256 _amount) internal virtual {
        require(_account != address(0), "ERC20: mint to the zero address");

        sharesTotalSupply = sharesTotalSupply.add(_amount);
        sharesBalances[_account] = sharesBalances[_account].add(_amount);
        emit Transfer(address(0), _account, _amount);
    }

    /// @dev Helper to transfer tokens between accounts. Can be overridden.
    function __transfer(
        address _sender,
        address _recipient,
        uint256 _amount
    ) internal virtual {
        require(_sender != address(0), "ERC20: transfer from the zero address");
        require(_recipient != address(0), "ERC20: transfer to the zero address");

        sharesBalances[_sender] = sharesBalances[_sender].sub(
            _amount,
            "ERC20: transfer amount exceeds balance"
        );
        sharesBalances[_recipient] = sharesBalances[_recipient].add(_amount);
        emit Transfer(_sender, _recipient, _amount);
    }
}

File 52 of 138 : VaultLibSafeMath.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title VaultLibSafeMath library
/// @notice A narrowed, verbatim implementation of OpenZeppelin 3.2.0 SafeMath
/// for use with VaultLib
/// @dev Preferred to importing from npm to guarantee consistent logic and revert reasons
/// between VaultLib implementations
/// DO NOT EDIT THIS CONTRACT
library VaultLibSafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "VaultLibSafeMath: addition overflow");

        return c;
    }

    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "VaultLibSafeMath: subtraction overflow");
    }

    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "VaultLibSafeMath: multiplication overflow");

        return c;
    }

    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "VaultLibSafeMath: division by zero");
    }

    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;

        return c;
    }

    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "VaultLibSafeMath: modulo by zero");
    }

    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

File 53 of 138 : IAggregatedDerivativePriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./IDerivativePriceFeed.sol";

/// @title IDerivativePriceFeed Interface
/// @author Enzyme Council <[email protected]>
interface IAggregatedDerivativePriceFeed is IDerivativePriceFeed {
    function getPriceFeedForDerivative(address) external view returns (address);
}

File 54 of 138 : UniswapV2PoolPriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../interfaces/IUniswapV2Pair.sol";
import "../../../../utils/MathHelpers.sol";
import "../../../utils/DispatcherOwnerMixin.sol";
import "../../../value-interpreter/ValueInterpreter.sol";
import "../../primitives/IPrimitivePriceFeed.sol";
import "../../utils/UniswapV2PoolTokenValueCalculator.sol";
import "../IDerivativePriceFeed.sol";

/// @title UniswapV2PoolPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price feed for Uniswap lending pool tokens
contract UniswapV2PoolPriceFeed is
    IDerivativePriceFeed,
    DispatcherOwnerMixin,
    MathHelpers,
    UniswapV2PoolTokenValueCalculator
{
    event PoolTokenAdded(address indexed poolToken, address token0, address token1);

    struct PoolTokenInfo {
        address token0;
        address token1;
        uint8 token0Decimals;
        uint8 token1Decimals;
    }

    uint256 private constant POOL_TOKEN_UNIT = 10**18;
    address private immutable DERIVATIVE_PRICE_FEED;
    address private immutable FACTORY;
    address private immutable PRIMITIVE_PRICE_FEED;
    address private immutable VALUE_INTERPRETER;

    mapping(address => PoolTokenInfo) private poolTokenToInfo;

    constructor(
        address _dispatcher,
        address _derivativePriceFeed,
        address _primitivePriceFeed,
        address _valueInterpreter,
        address _factory,
        address[] memory _poolTokens
    ) public DispatcherOwnerMixin(_dispatcher) {
        DERIVATIVE_PRICE_FEED = _derivativePriceFeed;
        FACTORY = _factory;
        PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
        VALUE_INTERPRETER = _valueInterpreter;

        __addPoolTokens(_poolTokens, _derivativePriceFeed, _primitivePriceFeed);
    }

    /// @notice Converts a given amount of a derivative to its underlying asset values
    /// @param _derivative The derivative to convert
    /// @param _derivativeAmount The amount of the derivative to convert
    /// @return underlyings_ The underlying assets for the _derivative
    /// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
    function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
        external
        override
        returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
    {
        PoolTokenInfo memory poolTokenInfo = poolTokenToInfo[_derivative];

        underlyings_ = new address[](2);
        underlyings_[0] = poolTokenInfo.token0;
        underlyings_[1] = poolTokenInfo.token1;

        // Calculate the amounts underlying one unit of a pool token,
        // taking into account the known, trusted rate between the two underlyings
        (uint256 token0TrustedRateAmount, uint256 token1TrustedRateAmount) = __calcTrustedRate(
            poolTokenInfo.token0,
            poolTokenInfo.token1,
            poolTokenInfo.token0Decimals,
            poolTokenInfo.token1Decimals
        );

        (
            uint256 token0DenormalizedRate,
            uint256 token1DenormalizedRate
        ) = __calcTrustedPoolTokenValue(
            FACTORY,
            _derivative,
            token0TrustedRateAmount,
            token1TrustedRateAmount
        );

        // Define normalized rates for each underlying
        underlyingAmounts_ = new uint256[](2);
        underlyingAmounts_[0] = _derivativeAmount.mul(token0DenormalizedRate).div(POOL_TOKEN_UNIT);
        underlyingAmounts_[1] = _derivativeAmount.mul(token1DenormalizedRate).div(POOL_TOKEN_UNIT);

        return (underlyings_, underlyingAmounts_);
    }

    /// @notice Checks if an asset is supported by the price feed
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is supported
    function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
        return poolTokenToInfo[_asset].token0 != address(0);
    }

    // PRIVATE FUNCTIONS

    /// @dev Calculates the trusted rate of two assets based on our price feeds.
    /// Uses the decimals-derived unit for whichever asset is used as the quote asset.
    function __calcTrustedRate(
        address _token0,
        address _token1,
        uint256 _token0Decimals,
        uint256 _token1Decimals
    ) private returns (uint256 token0RateAmount_, uint256 token1RateAmount_) {
        bool rateIsValid;
        // The quote asset of the value lookup must be a supported primitive asset,
        // so we cycle through the tokens until reaching a primitive.
        // If neither is a primitive, will revert at the ValueInterpreter
        if (IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_token0)) {
            token1RateAmount_ = 10**_token1Decimals;
            (token0RateAmount_, rateIsValid) = ValueInterpreter(VALUE_INTERPRETER)
                .calcCanonicalAssetValue(_token1, token1RateAmount_, _token0);
        } else {
            token0RateAmount_ = 10**_token0Decimals;
            (token1RateAmount_, rateIsValid) = ValueInterpreter(VALUE_INTERPRETER)
                .calcCanonicalAssetValue(_token0, token0RateAmount_, _token1);
        }

        require(rateIsValid, "__calcTrustedRate: Invalid rate");

        return (token0RateAmount_, token1RateAmount_);
    }

    //////////////////////////
    // POOL TOKENS REGISTRY //
    //////////////////////////

    /// @notice Adds Uniswap pool tokens to the price feed
    /// @param _poolTokens Uniswap pool tokens to add
    function addPoolTokens(address[] calldata _poolTokens) external onlyDispatcherOwner {
        require(_poolTokens.length > 0, "addPoolTokens: Empty _poolTokens");

        __addPoolTokens(_poolTokens, DERIVATIVE_PRICE_FEED, PRIMITIVE_PRICE_FEED);
    }

    /// @dev Helper to add Uniswap pool tokens
    function __addPoolTokens(
        address[] memory _poolTokens,
        address _derivativePriceFeed,
        address _primitivePriceFeed
    ) private {
        for (uint256 i; i < _poolTokens.length; i++) {
            require(_poolTokens[i] != address(0), "__addPoolTokens: Empty poolToken");
            require(
                poolTokenToInfo[_poolTokens[i]].token0 == address(0),
                "__addPoolTokens: Value already set"
            );

            IUniswapV2Pair uniswapV2Pair = IUniswapV2Pair(_poolTokens[i]);
            address token0 = uniswapV2Pair.token0();
            address token1 = uniswapV2Pair.token1();

            require(
                __poolTokenIsSupportable(
                    _derivativePriceFeed,
                    _primitivePriceFeed,
                    token0,
                    token1
                ),
                "__addPoolTokens: Unsupported pool token"
            );

            poolTokenToInfo[_poolTokens[i]] = PoolTokenInfo({
                token0: token0,
                token1: token1,
                token0Decimals: ERC20(token0).decimals(),
                token1Decimals: ERC20(token1).decimals()
            });

            emit PoolTokenAdded(_poolTokens[i], token0, token1);
        }
    }

    /// @dev Helper to determine if a pool token is supportable, based on whether price feeds are
    /// available for its underlying feeds. At least one of the underlying tokens must be
    /// a supported primitive asset, and the other must be a primitive or derivative.
    function __poolTokenIsSupportable(
        address _derivativePriceFeed,
        address _primitivePriceFeed,
        address _token0,
        address _token1
    ) private view returns (bool isSupportable_) {
        IDerivativePriceFeed derivativePriceFeedContract = IDerivativePriceFeed(
            _derivativePriceFeed
        );
        IPrimitivePriceFeed primitivePriceFeedContract = IPrimitivePriceFeed(_primitivePriceFeed);

        if (primitivePriceFeedContract.isSupportedAsset(_token0)) {
            if (
                primitivePriceFeedContract.isSupportedAsset(_token1) ||
                derivativePriceFeedContract.isSupportedAsset(_token1)
            ) {
                return true;
            }
        } else if (
            derivativePriceFeedContract.isSupportedAsset(_token0) &&
            primitivePriceFeedContract.isSupportedAsset(_token1)
        ) {
            return true;
        }

        return false;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `DERIVATIVE_PRICE_FEED` variable value
    /// @return derivativePriceFeed_ The `DERIVATIVE_PRICE_FEED` variable value
    function getDerivativePriceFeed() external view returns (address derivativePriceFeed_) {
        return DERIVATIVE_PRICE_FEED;
    }

    /// @notice Gets the `FACTORY` variable value
    /// @return factory_ The `FACTORY` variable value
    function getFactory() external view returns (address factory_) {
        return FACTORY;
    }

    /// @notice Gets the `PoolTokenInfo` for a given pool token
    /// @param _poolToken The pool token for which to get the `PoolTokenInfo`
    /// @return poolTokenInfo_ The `PoolTokenInfo` value
    function getPoolTokenInfo(address _poolToken)
        external
        view
        returns (PoolTokenInfo memory poolTokenInfo_)
    {
        return poolTokenToInfo[_poolToken];
    }

    /// @notice Gets the underlyings for a given pool token
    /// @param _poolToken The pool token for which to get its underlyings
    /// @return token0_ The UniswapV2Pair.token0 value
    /// @return token1_ The UniswapV2Pair.token1 value
    function getPoolTokenUnderlyings(address _poolToken)
        external
        view
        returns (address token0_, address token1_)
    {
        return (poolTokenToInfo[_poolToken].token0, poolTokenToInfo[_poolToken].token1);
    }

    /// @notice Gets the `PRIMITIVE_PRICE_FEED` variable value
    /// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
    function getPrimitivePriceFeed() external view returns (address primitivePriceFeed_) {
        return PRIMITIVE_PRICE_FEED;
    }

    /// @notice Gets the `VALUE_INTERPRETER` variable value
    /// @return valueInterpreter_ The `VALUE_INTERPRETER` variable value
    function getValueInterpreter() external view returns (address valueInterpreter_) {
        return VALUE_INTERPRETER;
    }
}

File 55 of 138 : IUniswapV2Pair.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IUniswapV2Pair Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for our interactions with the Uniswap V2's Pair contract
interface IUniswapV2Pair {
    function getReserves()
        external
        view
        returns (
            uint112,
            uint112,
            uint32
        );

    function kLast() external view returns (uint256);

    function token0() external view returns (address);

    function token1() external view returns (address);

    function totalSupply() external view returns (uint256);
}

File 56 of 138 : UniswapV2PoolTokenValueCalculator.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../interfaces/IUniswapV2Factory.sol";
import "../../../interfaces/IUniswapV2Pair.sol";

/// @title UniswapV2PoolTokenValueCalculator Contract
/// @author Enzyme Council <[email protected]>
/// @notice Abstract contract for computing the value of Uniswap liquidity pool tokens
/// @dev Unless otherwise noted, these functions are adapted to our needs and style guide from
/// an un-merged Uniswap branch:
/// https://github.com/Uniswap/uniswap-v2-periphery/blob/267ba44471f3357071a2fe2573fe4da42d5ad969/contracts/libraries/UniswapV2LiquidityMathLibrary.sol
abstract contract UniswapV2PoolTokenValueCalculator {
    using SafeMath for uint256;

    uint256 private constant POOL_TOKEN_UNIT = 10**18;

    // INTERNAL FUNCTIONS

    /// @dev Given a Uniswap pool with token0 and token1 and their trusted rate,
    /// returns the value of one pool token unit in terms of token0 and token1.
    /// This is the only function used outside of this contract.
    function __calcTrustedPoolTokenValue(
        address _factory,
        address _pair,
        uint256 _token0TrustedRateAmount,
        uint256 _token1TrustedRateAmount
    ) internal view returns (uint256 token0Amount_, uint256 token1Amount_) {
        (uint256 reserve0, uint256 reserve1) = __calcReservesAfterArbitrage(
            _pair,
            _token0TrustedRateAmount,
            _token1TrustedRateAmount
        );

        return __calcPoolTokenValue(_factory, _pair, reserve0, reserve1);
    }

    // PRIVATE FUNCTIONS

    /// @dev Computes liquidity value given all the parameters of the pair
    function __calcPoolTokenValue(
        address _factory,
        address _pair,
        uint256 _reserve0,
        uint256 _reserve1
    ) private view returns (uint256 token0Amount_, uint256 token1Amount_) {
        IUniswapV2Pair pairContract = IUniswapV2Pair(_pair);
        uint256 totalSupply = pairContract.totalSupply();

        if (IUniswapV2Factory(_factory).feeTo() != address(0)) {
            uint256 kLast = pairContract.kLast();
            if (kLast > 0) {
                uint256 rootK = __uniswapSqrt(_reserve0.mul(_reserve1));
                uint256 rootKLast = __uniswapSqrt(kLast);
                if (rootK > rootKLast) {
                    uint256 numerator = totalSupply.mul(rootK.sub(rootKLast));
                    uint256 denominator = rootK.mul(5).add(rootKLast);
                    uint256 feeLiquidity = numerator.div(denominator);
                    totalSupply = totalSupply.add(feeLiquidity);
                }
            }
        }
        return (
            _reserve0.mul(POOL_TOKEN_UNIT).div(totalSupply),
            _reserve1.mul(POOL_TOKEN_UNIT).div(totalSupply)
        );
    }

    /// @dev Calculates the direction and magnitude of the profit-maximizing trade
    function __calcProfitMaximizingTrade(
        uint256 _token0TrustedRateAmount,
        uint256 _token1TrustedRateAmount,
        uint256 _reserve0,
        uint256 _reserve1
    ) private pure returns (bool token0ToToken1_, uint256 amountIn_) {
        token0ToToken1_ =
            _reserve0.mul(_token1TrustedRateAmount).div(_reserve1) < _token0TrustedRateAmount;

        uint256 leftSide;
        uint256 rightSide;
        if (token0ToToken1_) {
            leftSide = __uniswapSqrt(
                _reserve0.mul(_reserve1).mul(_token0TrustedRateAmount).mul(1000).div(
                    _token1TrustedRateAmount.mul(997)
                )
            );
            rightSide = _reserve0.mul(1000).div(997);
        } else {
            leftSide = __uniswapSqrt(
                _reserve0.mul(_reserve1).mul(_token1TrustedRateAmount).mul(1000).div(
                    _token0TrustedRateAmount.mul(997)
                )
            );
            rightSide = _reserve1.mul(1000).div(997);
        }

        if (leftSide < rightSide) {
            return (false, 0);
        }

        // Calculate the amount that must be sent to move the price to the profit-maximizing price
        amountIn_ = leftSide.sub(rightSide);

        return (token0ToToken1_, amountIn_);
    }

    /// @dev Calculates the pool reserves after an arbitrage moves the price to
    /// the profit-maximizing rate, given an externally-observed trusted rate
    /// between the two pooled assets
    function __calcReservesAfterArbitrage(
        address _pair,
        uint256 _token0TrustedRateAmount,
        uint256 _token1TrustedRateAmount
    ) private view returns (uint256 reserve0_, uint256 reserve1_) {
        (reserve0_, reserve1_, ) = IUniswapV2Pair(_pair).getReserves();

        // Skip checking whether the reserve is 0, as this is extremely unlikely given how
        // initial pool liquidity is locked, and since we maintain a list of registered pool tokens

        // Calculate how much to swap to arb to the trusted price
        (bool token0ToToken1, uint256 amountIn) = __calcProfitMaximizingTrade(
            _token0TrustedRateAmount,
            _token1TrustedRateAmount,
            reserve0_,
            reserve1_
        );
        if (amountIn == 0) {
            return (reserve0_, reserve1_);
        }

        // Adjust the reserves to account for the arb trade to the trusted price
        if (token0ToToken1) {
            uint256 amountOut = __uniswapV2GetAmountOut(amountIn, reserve0_, reserve1_);
            reserve0_ = reserve0_.add(amountIn);
            reserve1_ = reserve1_.sub(amountOut);
        } else {
            uint256 amountOut = __uniswapV2GetAmountOut(amountIn, reserve1_, reserve0_);
            reserve1_ = reserve1_.add(amountIn);
            reserve0_ = reserve0_.sub(amountOut);
        }

        return (reserve0_, reserve1_);
    }

    /// @dev Uniswap square root function. See:
    /// https://github.com/Uniswap/uniswap-lib/blob/6ddfedd5716ba85b905bf34d7f1f3c659101a1bc/contracts/libraries/Babylonian.sol
    function __uniswapSqrt(uint256 _y) private pure returns (uint256 z_) {
        if (_y > 3) {
            z_ = _y;
            uint256 x = _y / 2 + 1;
            while (x < z_) {
                z_ = x;
                x = (_y / x + x) / 2;
            }
        } else if (_y != 0) {
            z_ = 1;
        }
        // else z_ = 0

        return z_;
    }

    /// @dev Simplified version of UniswapV2Library's getAmountOut() function. See:
    /// https://github.com/Uniswap/uniswap-v2-periphery/blob/87edfdcaf49ccc52591502993db4c8c08ea9eec0/contracts/libraries/UniswapV2Library.sol#L42-L50
    function __uniswapV2GetAmountOut(
        uint256 _amountIn,
        uint256 _reserveIn,
        uint256 _reserveOut
    ) private pure returns (uint256 amountOut_) {
        uint256 amountInWithFee = _amountIn.mul(997);
        uint256 numerator = amountInWithFee.mul(_reserveOut);
        uint256 denominator = _reserveIn.mul(1000).add(amountInWithFee);

        return numerator.div(denominator);
    }
}

File 57 of 138 : IUniswapV2Factory.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IUniswapV2Factory Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for our interactions with the Uniswap V2's Factory contract
interface IUniswapV2Factory {
    function feeTo() external view returns (address);

    function getPair(address, address) external view returns (address);
}

File 58 of 138 : WdgldPriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IChainlinkAggregator.sol";
import "../../../../utils/MakerDaoMath.sol";
import "../IDerivativePriceFeed.sol";

/// @title WdgldPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for WDGLD <https://dgld.ch/>
contract WdgldPriceFeed is IDerivativePriceFeed, MakerDaoMath {
    using SafeMath for uint256;

    address private immutable XAU_AGGREGATOR;
    address private immutable ETH_AGGREGATOR;

    address private immutable WDGLD;
    address private immutable WETH;

    // GTR_CONSTANT aggregates all the invariants in the GTR formula to save gas
    uint256 private constant GTR_CONSTANT = 999990821653213975346065101;
    uint256 private constant GTR_PRECISION = 10**27;
    uint256 private constant WDGLD_GENESIS_TIMESTAMP = 1568700000;

    constructor(
        address _wdgld,
        address _weth,
        address _ethAggregator,
        address _xauAggregator
    ) public {
        WDGLD = _wdgld;
        WETH = _weth;
        ETH_AGGREGATOR = _ethAggregator;
        XAU_AGGREGATOR = _xauAggregator;
    }

    /// @notice Converts a given amount of a derivative to its underlying asset values
    /// @param _derivative The derivative to convert
    /// @param _derivativeAmount The amount of the derivative to convert
    /// @return underlyings_ The underlying assets for the _derivative
    /// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
    function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
        external
        override
        returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
    {
        require(isSupportedAsset(_derivative), "calcUnderlyingValues: Only WDGLD is supported");

        underlyings_ = new address[](1);
        underlyings_[0] = WETH;
        underlyingAmounts_ = new uint256[](1);

        // Get price rates from xau and eth aggregators
        int256 xauToUsdRate = IChainlinkAggregator(XAU_AGGREGATOR).latestAnswer();
        int256 ethToUsdRate = IChainlinkAggregator(ETH_AGGREGATOR).latestAnswer();
        require(xauToUsdRate > 0 && ethToUsdRate > 0, "calcUnderlyingValues: rate invalid");

        uint256 wdgldToXauRate = calcWdgldToXauRate();

        // 10**17 is a combination of ETH_UNIT / WDGLD_UNIT * GTR_PRECISION
        underlyingAmounts_[0] = _derivativeAmount
            .mul(wdgldToXauRate)
            .mul(uint256(xauToUsdRate))
            .div(uint256(ethToUsdRate))
            .div(10**17);

        return (underlyings_, underlyingAmounts_);
    }

    /// @notice Calculates the rate of WDGLD to XAU.
    /// @return wdgldToXauRate_ The current rate of WDGLD to XAU
    /// @dev Full formula available <https://dgld.ch/assets/documents/dgld-whitepaper.pdf>
    function calcWdgldToXauRate() public view returns (uint256 wdgldToXauRate_) {
        return
            __rpow(
                GTR_CONSTANT,
                ((block.timestamp).sub(WDGLD_GENESIS_TIMESTAMP)).div(28800), // 60 * 60 * 8 (8 hour periods)
                GTR_PRECISION
            )
                .div(10);
    }

    /// @notice Checks if an asset is supported by this price feed
    /// @param _asset The asset to check
    /// @return isSupported_ True if supported
    function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
        return _asset == WDGLD;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `ETH_AGGREGATOR` address
    /// @return ethAggregatorAddress_ The `ETH_AGGREGATOR` address
    function getEthAggregator() external view returns (address ethAggregatorAddress_) {
        return ETH_AGGREGATOR;
    }

    /// @notice Gets the `WDGLD` token address
    /// @return wdgld_ The `WDGLD` token address
    function getWdgld() external view returns (address wdgld_) {
        return WDGLD;
    }

    /// @notice Gets the `WETH` token address
    /// @return weth_ The `WETH` token address
    function getWeth() external view returns (address weth_) {
        return WETH;
    }

    /// @notice Gets the `XAU_AGGREGATOR` address
    /// @return xauAggregatorAddress_ The `XAU_AGGREGATOR` address
    function getXauAggregator() external view returns (address xauAggregatorAddress_) {
        return XAU_AGGREGATOR;
    }
}

File 59 of 138 : IChainlinkAggregator.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IChainlinkAggregator Interface
/// @author Enzyme Council <[email protected]>
interface IChainlinkAggregator {
    function latestAnswer() external view returns (int256);

    function latestTimestamp() external view returns (uint256);
}

File 60 of 138 : MakerDaoMath.sol
// SPDX-License-Identifier: AGPL-3.0-or-later

// Copyright (C) 2018 Rain <[email protected]>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

pragma solidity 0.6.12;

/// @title MakerDaoMath Contract
/// @author Enzyme Council <[email protected]>
/// @notice Helper functions for math operations adapted from MakerDao contracts
abstract contract MakerDaoMath {
    /// @dev Performs scaled, fixed-point exponentiation.
    /// Verbatim code, adapted to our style guide for variable naming only, see:
    /// https://github.com/makerdao/dss/blob/master/src/pot.sol#L83-L105
    // prettier-ignore
    function __rpow(uint256 _x, uint256 _n, uint256 _base) internal pure returns (uint256 z_) {
        assembly {
            switch _x case 0 {switch _n case 0 {z_ := _base} default {z_ := 0}}
            default {
                switch mod(_n, 2) case 0 { z_ := _base } default { z_ := _x }
                let half := div(_base, 2)
                for { _n := div(_n, 2) } _n { _n := div(_n,2) } {
                    let xx := mul(_x, _x)
                    if iszero(eq(div(xx, _x), _x)) { revert(0,0) }
                    let xxRound := add(xx, half)
                    if lt(xxRound, xx) { revert(0,0) }
                    _x := div(xxRound, _base)
                    if mod(_n,2) {
                        let zx := mul(z_, _x)
                        if and(iszero(iszero(_x)), iszero(eq(div(zx, _x), z_))) { revert(0,0) }
                        let zxRound := add(zx, half)
                        if lt(zxRound, zx) { revert(0,0) }
                        z_ := div(zxRound, _base)
                    }
                }
            }
        }

        return z_;
    }
}

File 61 of 138 : ManagementFee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../core/fund/vault/VaultLib.sol";
import "../../../utils/MakerDaoMath.sol";
import "./utils/FeeBase.sol";

/// @title ManagementFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice A management fee with a configurable annual rate
contract ManagementFee is FeeBase, MakerDaoMath {
    using SafeMath for uint256;

    event FundSettingsAdded(address indexed comptrollerProxy, uint256 scaledPerSecondRate);

    event Settled(
        address indexed comptrollerProxy,
        uint256 sharesQuantity,
        uint256 secondsSinceSettlement
    );

    struct FeeInfo {
        uint256 scaledPerSecondRate;
        uint256 lastSettled;
    }

    uint256 private constant RATE_SCALE_BASE = 10**27;

    mapping(address => FeeInfo) private comptrollerProxyToFeeInfo;

    constructor(address _feeManager) public FeeBase(_feeManager) {}

    // EXTERNAL FUNCTIONS

    /// @notice Activates the fee for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _vaultProxy The VaultProxy of the fund
    function activateForFund(address _comptrollerProxy, address _vaultProxy)
        external
        override
        onlyFeeManager
    {
        // It is only necessary to set `lastSettled` for a migrated fund
        if (VaultLib(_vaultProxy).totalSupply() > 0) {
            comptrollerProxyToFeeInfo[_comptrollerProxy].lastSettled = block.timestamp;
        }
    }

    /// @notice Add the initial fee settings for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _settingsData Encoded settings to apply to the fee for a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData)
        external
        override
        onlyFeeManager
    {
        uint256 scaledPerSecondRate = abi.decode(_settingsData, (uint256));
        require(
            scaledPerSecondRate > 0,
            "addFundSettings: scaledPerSecondRate must be greater than 0"
        );

        comptrollerProxyToFeeInfo[_comptrollerProxy] = FeeInfo({
            scaledPerSecondRate: scaledPerSecondRate,
            lastSettled: 0
        });

        emit FundSettingsAdded(_comptrollerProxy, scaledPerSecondRate);
    }

    /// @notice Provides a constant string identifier for a fee
    /// @return identifier_ The identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "MANAGEMENT";
    }

    /// @notice Gets the hooks that are implemented by the fee
    /// @return implementedHooksForSettle_ The hooks during which settle() is implemented
    /// @return implementedHooksForUpdate_ The hooks during which update() is implemented
    /// @return usesGavOnSettle_ True if GAV is used during the settle() implementation
    /// @return usesGavOnUpdate_ True if GAV is used during the update() implementation
    /// @dev Used only during fee registration
    function implementedHooks()
        external
        view
        override
        returns (
            IFeeManager.FeeHook[] memory implementedHooksForSettle_,
            IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
            bool usesGavOnSettle_,
            bool usesGavOnUpdate_
        )
    {
        implementedHooksForSettle_ = new IFeeManager.FeeHook[](3);
        implementedHooksForSettle_[0] = IFeeManager.FeeHook.Continuous;
        implementedHooksForSettle_[1] = IFeeManager.FeeHook.BuySharesSetup;
        implementedHooksForSettle_[2] = IFeeManager.FeeHook.PreRedeemShares;

        return (implementedHooksForSettle_, new IFeeManager.FeeHook[](0), false, false);
    }

    /// @notice Settle the fee and calculate shares due
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _vaultProxy The VaultProxy of the fund
    /// @return settlementType_ The type of settlement
    /// @return (unused) The payer of shares due
    /// @return sharesDue_ The amount of shares due
    function settle(
        address _comptrollerProxy,
        address _vaultProxy,
        IFeeManager.FeeHook,
        bytes calldata,
        uint256
    )
        external
        override
        onlyFeeManager
        returns (
            IFeeManager.SettlementType settlementType_,
            address,
            uint256 sharesDue_
        )
    {
        FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];

        // If this fee was settled in the current block, we can return early
        uint256 secondsSinceSettlement = block.timestamp.sub(feeInfo.lastSettled);
        if (secondsSinceSettlement == 0) {
            return (IFeeManager.SettlementType.None, address(0), 0);
        }

        // If there are shares issued for the fund, calculate the shares due
        VaultLib vaultProxyContract = VaultLib(_vaultProxy);
        uint256 sharesSupply = vaultProxyContract.totalSupply();
        if (sharesSupply > 0) {
            // This assumes that all shares in the VaultProxy are shares outstanding,
            // which is fine for this release. Even if they are not, they are still shares that
            // are only claimable by the fund owner.
            uint256 netSharesSupply = sharesSupply.sub(vaultProxyContract.balanceOf(_vaultProxy));
            if (netSharesSupply > 0) {
                sharesDue_ = netSharesSupply
                    .mul(
                    __rpow(feeInfo.scaledPerSecondRate, secondsSinceSettlement, RATE_SCALE_BASE)
                        .sub(RATE_SCALE_BASE)
                )
                    .div(RATE_SCALE_BASE);
            }
        }

        // Must settle even when no shares are due, for the case that settlement is being
        // done when there are no shares in the fund (i.e. at the first investment, or at the
        // first investment after all shares have been redeemed)
        comptrollerProxyToFeeInfo[_comptrollerProxy].lastSettled = block.timestamp;
        emit Settled(_comptrollerProxy, sharesDue_, secondsSinceSettlement);

        if (sharesDue_ == 0) {
            return (IFeeManager.SettlementType.None, address(0), 0);
        }

        return (IFeeManager.SettlementType.Mint, address(0), sharesDue_);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the feeInfo for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy contract of the fund
    /// @return feeInfo_ The feeInfo
    function getFeeInfoForFund(address _comptrollerProxy)
        external
        view
        returns (FeeInfo memory feeInfo_)
    {
        return comptrollerProxyToFeeInfo[_comptrollerProxy];
    }
}

File 62 of 138 : FeeBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../IFee.sol";

/// @title FeeBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Abstract base contract for all fees
abstract contract FeeBase is IFee {
    address internal immutable FEE_MANAGER;

    modifier onlyFeeManager {
        require(msg.sender == FEE_MANAGER, "Only the FeeManger can make this call");
        _;
    }

    constructor(address _feeManager) public {
        FEE_MANAGER = _feeManager;
    }

    /// @notice Allows Fee to run logic during fund activation
    /// @dev Unimplemented by default, may be overrode.
    function activateForFund(address, address) external virtual override {
        return;
    }

    /// @notice Runs payout logic for a fee that utilizes shares outstanding as its settlement type
    /// @dev Returns false by default, can be overridden by fee
    function payout(address, address) external virtual override returns (bool) {
        return false;
    }

    /// @notice Update fee state after all settlement has occurred during a given fee hook
    /// @dev Unimplemented by default, can be overridden by fee
    function update(
        address,
        address,
        IFeeManager.FeeHook,
        bytes calldata,
        uint256
    ) external virtual override {
        return;
    }

    /// @notice Helper to parse settlement arguments from encoded data for PreBuyShares fee hook
    function __decodePreBuySharesSettlementData(bytes memory _settlementData)
        internal
        pure
        returns (
            address buyer_,
            uint256 investmentAmount_,
            uint256 minSharesQuantity_
        )
    {
        return abi.decode(_settlementData, (address, uint256, uint256));
    }

    /// @notice Helper to parse settlement arguments from encoded data for PreRedeemShares fee hook
    function __decodePreRedeemSharesSettlementData(bytes memory _settlementData)
        internal
        pure
        returns (address redeemer_, uint256 sharesQuantity_)
    {
        return abi.decode(_settlementData, (address, uint256));
    }

    /// @notice Helper to parse settlement arguments from encoded data for PostBuyShares fee hook
    function __decodePostBuySharesSettlementData(bytes memory _settlementData)
        internal
        pure
        returns (
            address buyer_,
            uint256 investmentAmount_,
            uint256 sharesBought_
        )
    {
        return abi.decode(_settlementData, (address, uint256, uint256));
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `FEE_MANAGER` variable
    /// @return feeManager_ The `FEE_MANAGER` variable value
    function getFeeManager() external view returns (address feeManager_) {
        return FEE_MANAGER;
    }
}

File 63 of 138 : IFee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./IFeeManager.sol";

/// @title Fee Interface
/// @author Enzyme Council <[email protected]>
/// @notice Interface for all fees
interface IFee {
    function activateForFund(address _comptrollerProxy, address _vaultProxy) external;

    function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData) external;

    function identifier() external pure returns (string memory identifier_);

    function implementedHooks()
        external
        view
        returns (
            IFeeManager.FeeHook[] memory implementedHooksForSettle_,
            IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
            bool usesGavOnSettle_,
            bool usesGavOnUpdate_
        );

    function payout(address _comptrollerProxy, address _vaultProxy)
        external
        returns (bool isPayable_);

    function settle(
        address _comptrollerProxy,
        address _vaultProxy,
        IFeeManager.FeeHook _hook,
        bytes calldata _settlementData,
        uint256 _gav
    )
        external
        returns (
            IFeeManager.SettlementType settlementType_,
            address payer_,
            uint256 sharesDue_
        );

    function update(
        address _comptrollerProxy,
        address _vaultProxy,
        IFeeManager.FeeHook _hook,
        bytes calldata _settlementData,
        uint256 _gav
    ) external;
}

File 64 of 138 : PerformanceFee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/math/SignedSafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../core/fund/comptroller/ComptrollerLib.sol";
import "../FeeManager.sol";
import "./utils/FeeBase.sol";

/// @title PerformanceFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice A performance-based fee with configurable rate and crystallization period, using
/// a high watermark
/// @dev This contract assumes that all shares in the VaultProxy are shares outstanding,
/// which is fine for this release. Even if they are not, they are still shares that
/// are only claimable by the fund owner.
contract PerformanceFee is FeeBase {
    using SafeMath for uint256;
    using SignedSafeMath for int256;

    event ActivatedForFund(address indexed comptrollerProxy, uint256 highWaterMark);

    event FundSettingsAdded(address indexed comptrollerProxy, uint256 rate, uint256 period);

    event LastSharePriceUpdated(
        address indexed comptrollerProxy,
        uint256 prevSharePrice,
        uint256 nextSharePrice
    );

    event PaidOut(
        address indexed comptrollerProxy,
        uint256 prevHighWaterMark,
        uint256 nextHighWaterMark,
        uint256 aggregateValueDue
    );

    event PerformanceUpdated(
        address indexed comptrollerProxy,
        uint256 prevAggregateValueDue,
        uint256 nextAggregateValueDue,
        int256 sharesOutstandingDiff
    );

    struct FeeInfo {
        uint256 rate;
        uint256 period;
        uint256 activated;
        uint256 lastPaid;
        uint256 highWaterMark;
        uint256 lastSharePrice;
        uint256 aggregateValueDue;
    }

    uint256 private constant RATE_DIVISOR = 10**18;
    uint256 private constant SHARE_UNIT = 10**18;

    mapping(address => FeeInfo) private comptrollerProxyToFeeInfo;

    constructor(address _feeManager) public FeeBase(_feeManager) {}

    // EXTERNAL FUNCTIONS

    /// @notice Activates the fee for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    function activateForFund(address _comptrollerProxy, address) external override onlyFeeManager {
        FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];

        // We must not force asset finality, otherwise funds that have Synths as tracked assets
        // would be susceptible to a DoS attack when attempting to migrate to a release that uses
        // this fee: an attacker trades a negligible amount of a tracked Synth with the VaultProxy
        // as the recipient, thus causing `calcGrossShareValue(true)` to fail.
        (uint256 grossSharePrice, bool sharePriceIsValid) = ComptrollerLib(_comptrollerProxy)
            .calcGrossShareValue(false);
        require(sharePriceIsValid, "activateForFund: Invalid share price");

        feeInfo.highWaterMark = grossSharePrice;
        feeInfo.lastSharePrice = grossSharePrice;
        feeInfo.activated = block.timestamp;

        emit ActivatedForFund(_comptrollerProxy, grossSharePrice);
    }

    /// @notice Add the initial fee settings for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _settingsData Encoded settings to apply to the policy for the fund
    /// @dev `highWaterMark`, `lastSharePrice`, and `activated` are set during activation
    function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData)
        external
        override
        onlyFeeManager
    {
        (uint256 feeRate, uint256 feePeriod) = abi.decode(_settingsData, (uint256, uint256));
        require(feeRate > 0, "addFundSettings: feeRate must be greater than 0");
        require(feePeriod > 0, "addFundSettings: feePeriod must be greater than 0");

        comptrollerProxyToFeeInfo[_comptrollerProxy] = FeeInfo({
            rate: feeRate,
            period: feePeriod,
            activated: 0,
            lastPaid: 0,
            highWaterMark: 0,
            lastSharePrice: 0,
            aggregateValueDue: 0
        });

        emit FundSettingsAdded(_comptrollerProxy, feeRate, feePeriod);
    }

    /// @notice Provides a constant string identifier for a fee
    /// @return identifier_ The identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "PERFORMANCE";
    }

    /// @notice Gets the hooks that are implemented by the fee
    /// @return implementedHooksForSettle_ The hooks during which settle() is implemented
    /// @return implementedHooksForUpdate_ The hooks during which update() is implemented
    /// @return usesGavOnSettle_ True if GAV is used during the settle() implementation
    /// @return usesGavOnUpdate_ True if GAV is used during the update() implementation
    /// @dev Used only during fee registration
    function implementedHooks()
        external
        view
        override
        returns (
            IFeeManager.FeeHook[] memory implementedHooksForSettle_,
            IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
            bool usesGavOnSettle_,
            bool usesGavOnUpdate_
        )
    {
        implementedHooksForSettle_ = new IFeeManager.FeeHook[](3);
        implementedHooksForSettle_[0] = IFeeManager.FeeHook.Continuous;
        implementedHooksForSettle_[1] = IFeeManager.FeeHook.BuySharesSetup;
        implementedHooksForSettle_[2] = IFeeManager.FeeHook.PreRedeemShares;

        implementedHooksForUpdate_ = new IFeeManager.FeeHook[](3);
        implementedHooksForUpdate_[0] = IFeeManager.FeeHook.Continuous;
        implementedHooksForUpdate_[1] = IFeeManager.FeeHook.BuySharesCompleted;
        implementedHooksForUpdate_[2] = IFeeManager.FeeHook.PreRedeemShares;

        return (implementedHooksForSettle_, implementedHooksForUpdate_, true, true);
    }

    /// @notice Checks whether the shares outstanding for the fee can be paid out, and updates
    /// the info for the fee's last payout
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return isPayable_ True if shares outstanding can be paid out
    function payout(address _comptrollerProxy, address)
        external
        override
        onlyFeeManager
        returns (bool isPayable_)
    {
        if (!payoutAllowed(_comptrollerProxy)) {
            return false;
        }

        FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
        feeInfo.lastPaid = block.timestamp;

        uint256 prevHighWaterMark = feeInfo.highWaterMark;
        uint256 nextHighWaterMark = __calcUint256Max(feeInfo.lastSharePrice, prevHighWaterMark);
        uint256 prevAggregateValueDue = feeInfo.aggregateValueDue;

        // Update state as necessary
        if (prevAggregateValueDue > 0) {
            feeInfo.aggregateValueDue = 0;
        }
        if (nextHighWaterMark > prevHighWaterMark) {
            feeInfo.highWaterMark = nextHighWaterMark;
        }

        emit PaidOut(
            _comptrollerProxy,
            prevHighWaterMark,
            nextHighWaterMark,
            prevAggregateValueDue
        );

        return true;
    }

    /// @notice Settles the fee and calculates shares due
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _vaultProxy The VaultProxy of the fund
    /// @param _gav The GAV of the fund
    /// @return settlementType_ The type of settlement
    /// @return (unused) The payer of shares due
    /// @return sharesDue_ The amount of shares due
    function settle(
        address _comptrollerProxy,
        address _vaultProxy,
        IFeeManager.FeeHook,
        bytes calldata,
        uint256 _gav
    )
        external
        override
        onlyFeeManager
        returns (
            IFeeManager.SettlementType settlementType_,
            address,
            uint256 sharesDue_
        )
    {
        if (_gav == 0) {
            return (IFeeManager.SettlementType.None, address(0), 0);
        }

        int256 settlementSharesDue = __settleAndUpdatePerformance(
            _comptrollerProxy,
            _vaultProxy,
            _gav
        );
        if (settlementSharesDue == 0) {
            return (IFeeManager.SettlementType.None, address(0), 0);
        } else if (settlementSharesDue > 0) {
            // Settle by minting shares outstanding for custody
            return (
                IFeeManager.SettlementType.MintSharesOutstanding,
                address(0),
                uint256(settlementSharesDue)
            );
        } else {
            // Settle by burning from shares outstanding
            return (
                IFeeManager.SettlementType.BurnSharesOutstanding,
                address(0),
                uint256(-settlementSharesDue)
            );
        }
    }

    /// @notice Updates the fee state after all fees have finished settle()
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _vaultProxy The VaultProxy of the fund
    /// @param _hook The FeeHook being executed
    /// @param _settlementData Encoded args to use in calculating the settlement
    /// @param _gav The GAV of the fund
    function update(
        address _comptrollerProxy,
        address _vaultProxy,
        IFeeManager.FeeHook _hook,
        bytes calldata _settlementData,
        uint256 _gav
    ) external override onlyFeeManager {
        uint256 prevSharePrice = comptrollerProxyToFeeInfo[_comptrollerProxy].lastSharePrice;
        uint256 nextSharePrice = __calcNextSharePrice(
            _comptrollerProxy,
            _vaultProxy,
            _hook,
            _settlementData,
            _gav
        );

        if (nextSharePrice == prevSharePrice) {
            return;
        }

        comptrollerProxyToFeeInfo[_comptrollerProxy].lastSharePrice = nextSharePrice;

        emit LastSharePriceUpdated(_comptrollerProxy, prevSharePrice, nextSharePrice);
    }

    // PUBLIC FUNCTIONS

    /// @notice Checks whether the shares outstanding can be paid out
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return payoutAllowed_ True if the fee payment is due
    /// @dev Payout is allowed if fees have not yet been settled in a crystallization period,
    /// and at least 1 crystallization period has passed since activation
    function payoutAllowed(address _comptrollerProxy) public view returns (bool payoutAllowed_) {
        FeeInfo memory feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
        uint256 period = feeInfo.period;

        uint256 timeSinceActivated = block.timestamp.sub(feeInfo.activated);

        // Check if at least 1 crystallization period has passed since activation
        if (timeSinceActivated < period) {
            return false;
        }

        // Check that a full crystallization period has passed since the last payout
        uint256 timeSincePeriodStart = timeSinceActivated % period;
        uint256 periodStart = block.timestamp.sub(timeSincePeriodStart);
        return feeInfo.lastPaid < periodStart;
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to calculate the aggregated value accumulated to a fund since the last
    /// settlement (happening at investment/redemption)
    /// Validated:
    /// _netSharesSupply > 0
    /// _sharePriceWithoutPerformance != _prevSharePrice
    function __calcAggregateValueDue(
        uint256 _netSharesSupply,
        uint256 _sharePriceWithoutPerformance,
        uint256 _prevSharePrice,
        uint256 _prevAggregateValueDue,
        uint256 _feeRate,
        uint256 _highWaterMark
    ) private pure returns (uint256) {
        int256 superHWMValueSinceLastSettled = (
            int256(__calcUint256Max(_highWaterMark, _sharePriceWithoutPerformance)).sub(
                int256(__calcUint256Max(_highWaterMark, _prevSharePrice))
            )
        )
            .mul(int256(_netSharesSupply))
            .div(int256(SHARE_UNIT));

        int256 valueDueSinceLastSettled = superHWMValueSinceLastSettled.mul(int256(_feeRate)).div(
            int256(RATE_DIVISOR)
        );

        return
            uint256(
                __calcInt256Max(0, int256(_prevAggregateValueDue).add(valueDueSinceLastSettled))
            );
    }

    /// @dev Helper to calculate the max of two int values
    function __calcInt256Max(int256 _a, int256 _b) private pure returns (int256) {
        if (_a >= _b) {
            return _a;
        }

        return _b;
    }

    /// @dev Helper to calculate the next `lastSharePrice` value
    function __calcNextSharePrice(
        address _comptrollerProxy,
        address _vaultProxy,
        IFeeManager.FeeHook _hook,
        bytes memory _settlementData,
        uint256 _gav
    ) private view returns (uint256 nextSharePrice_) {
        uint256 denominationAssetUnit = 10 **
            uint256(ERC20(ComptrollerLib(_comptrollerProxy).getDenominationAsset()).decimals());
        if (_gav == 0) {
            return denominationAssetUnit;
        }

        // Get shares outstanding via VaultProxy balance and calc shares supply to get net shares supply
        ERC20 vaultProxyContract = ERC20(_vaultProxy);
        uint256 totalSharesSupply = vaultProxyContract.totalSupply();
        uint256 nextNetSharesSupply = totalSharesSupply.sub(
            vaultProxyContract.balanceOf(_vaultProxy)
        );
        if (nextNetSharesSupply == 0) {
            return denominationAssetUnit;
        }

        uint256 nextGav = _gav;

        // For both Continuous and BuySharesCompleted hooks, _gav and shares supply will not change,
        // we only need additional calculations for PreRedeemShares
        if (_hook == IFeeManager.FeeHook.PreRedeemShares) {
            (, uint256 sharesDecrease) = __decodePreRedeemSharesSettlementData(_settlementData);

            // Shares have not yet been burned
            nextNetSharesSupply = nextNetSharesSupply.sub(sharesDecrease);
            if (nextNetSharesSupply == 0) {
                return denominationAssetUnit;
            }

            // Assets have not yet been withdrawn
            uint256 gavDecrease = sharesDecrease
                .mul(_gav)
                .mul(SHARE_UNIT)
                .div(totalSharesSupply)
                .div(denominationAssetUnit);

            nextGav = nextGav.sub(gavDecrease);
            if (nextGav == 0) {
                return denominationAssetUnit;
            }
        }

        return nextGav.mul(SHARE_UNIT).div(nextNetSharesSupply);
    }

    /// @dev Helper to calculate the performance metrics for a fund.
    /// Validated:
    /// _totalSharesSupply > 0
    /// _gav > 0
    /// _totalSharesSupply != _totalSharesOutstanding
    function __calcPerformance(
        address _comptrollerProxy,
        uint256 _totalSharesSupply,
        uint256 _totalSharesOutstanding,
        uint256 _prevAggregateValueDue,
        FeeInfo memory feeInfo,
        uint256 _gav
    ) private view returns (uint256 nextAggregateValueDue_, int256 sharesDue_) {
        // Use the 'shares supply net shares outstanding' for performance calcs.
        // Cannot be 0, as _totalSharesSupply != _totalSharesOutstanding
        uint256 netSharesSupply = _totalSharesSupply.sub(_totalSharesOutstanding);
        uint256 sharePriceWithoutPerformance = _gav.mul(SHARE_UNIT).div(netSharesSupply);

        // If gross share price has not changed, can exit early
        uint256 prevSharePrice = feeInfo.lastSharePrice;
        if (sharePriceWithoutPerformance == prevSharePrice) {
            return (_prevAggregateValueDue, 0);
        }

        nextAggregateValueDue_ = __calcAggregateValueDue(
            netSharesSupply,
            sharePriceWithoutPerformance,
            prevSharePrice,
            _prevAggregateValueDue,
            feeInfo.rate,
            feeInfo.highWaterMark
        );

        sharesDue_ = __calcSharesDue(
            _comptrollerProxy,
            netSharesSupply,
            _gav,
            nextAggregateValueDue_
        );

        return (nextAggregateValueDue_, sharesDue_);
    }

    /// @dev Helper to calculate sharesDue during settlement.
    /// Validated:
    /// _netSharesSupply > 0
    /// _gav > 0
    function __calcSharesDue(
        address _comptrollerProxy,
        uint256 _netSharesSupply,
        uint256 _gav,
        uint256 _nextAggregateValueDue
    ) private view returns (int256 sharesDue_) {
        // If _nextAggregateValueDue > _gav, then no shares can be created.
        // This is a known limitation of the model, which is only reached for unrealistically
        // high performance fee rates (> 100%). A revert is allowed in such a case.
        uint256 sharesDueForAggregateValueDue = _nextAggregateValueDue.mul(_netSharesSupply).div(
            _gav.sub(_nextAggregateValueDue)
        );

        // Shares due is the +/- diff or the total shares outstanding already minted
        return
            int256(sharesDueForAggregateValueDue).sub(
                int256(
                    FeeManager(FEE_MANAGER).getFeeSharesOutstandingForFund(
                        _comptrollerProxy,
                        address(this)
                    )
                )
            );
    }

    /// @dev Helper to calculate the max of two uint values
    function __calcUint256Max(uint256 _a, uint256 _b) private pure returns (uint256) {
        if (_a >= _b) {
            return _a;
        }

        return _b;
    }

    /// @dev Helper to settle the fee and update performance state.
    /// Validated:
    /// _gav > 0
    function __settleAndUpdatePerformance(
        address _comptrollerProxy,
        address _vaultProxy,
        uint256 _gav
    ) private returns (int256 sharesDue_) {
        ERC20 sharesTokenContract = ERC20(_vaultProxy);

        uint256 totalSharesSupply = sharesTokenContract.totalSupply();
        if (totalSharesSupply == 0) {
            return 0;
        }

        uint256 totalSharesOutstanding = sharesTokenContract.balanceOf(_vaultProxy);
        if (totalSharesOutstanding == totalSharesSupply) {
            return 0;
        }

        FeeInfo storage feeInfo = comptrollerProxyToFeeInfo[_comptrollerProxy];
        uint256 prevAggregateValueDue = feeInfo.aggregateValueDue;

        uint256 nextAggregateValueDue;
        (nextAggregateValueDue, sharesDue_) = __calcPerformance(
            _comptrollerProxy,
            totalSharesSupply,
            totalSharesOutstanding,
            prevAggregateValueDue,
            feeInfo,
            _gav
        );
        if (nextAggregateValueDue == prevAggregateValueDue) {
            return 0;
        }

        // Update fee state
        feeInfo.aggregateValueDue = nextAggregateValueDue;

        emit PerformanceUpdated(
            _comptrollerProxy,
            prevAggregateValueDue,
            nextAggregateValueDue,
            sharesDue_
        );

        return sharesDue_;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the feeInfo for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy contract of the fund
    /// @return feeInfo_ The feeInfo
    function getFeeInfoForFund(address _comptrollerProxy)
        external
        view
        returns (FeeInfo memory feeInfo_)
    {
        return comptrollerProxyToFeeInfo[_comptrollerProxy];
    }
}

File 65 of 138 : SignedSafeMath.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

/**
 * @title SignedSafeMath
 * @dev Signed math operations with safety checks that revert on error.
 */
library SignedSafeMath {
    int256 constant private _INT256_MIN = -2**255;

    /**
     * @dev Returns the multiplication of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(int256 a, int256 b) internal pure returns (int256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        require(!(a == -1 && b == _INT256_MIN), "SignedSafeMath: multiplication overflow");

        int256 c = a * b;
        require(c / a == b, "SignedSafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two signed integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(int256 a, int256 b) internal pure returns (int256) {
        require(b != 0, "SignedSafeMath: division by zero");
        require(!(b == -1 && a == _INT256_MIN), "SignedSafeMath: division overflow");

        int256 c = a / b;

        return c;
    }

    /**
     * @dev Returns the subtraction of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a - b;
        require((b >= 0 && c <= a) || (b < 0 && c > a), "SignedSafeMath: subtraction overflow");

        return c;
    }

    /**
     * @dev Returns the addition of two signed integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(int256 a, int256 b) internal pure returns (int256) {
        int256 c = a + b;
        require((b >= 0 && c >= a) || (b < 0 && c < a), "SignedSafeMath: addition overflow");

        return c;
    }
}

File 66 of 138 : FeeManager.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "../../core/fund/comptroller/IComptroller.sol";
import "../../core/fund/vault/IVault.sol";
import "../../utils/AddressArrayLib.sol";
import "../utils/ExtensionBase.sol";
import "../utils/FundDeployerOwnerMixin.sol";
import "../utils/PermissionedVaultActionMixin.sol";
import "./IFee.sol";
import "./IFeeManager.sol";

/// @title FeeManager Contract
/// @author Enzyme Council <[email protected]>
/// @notice Manages fees for funds
contract FeeManager is
    IFeeManager,
    ExtensionBase,
    FundDeployerOwnerMixin,
    PermissionedVaultActionMixin
{
    using AddressArrayLib for address[];
    using EnumerableSet for EnumerableSet.AddressSet;
    using SafeMath for uint256;

    event AllSharesOutstandingForcePaidForFund(
        address indexed comptrollerProxy,
        address payee,
        uint256 sharesDue
    );

    event FeeDeregistered(address indexed fee, string indexed identifier);

    event FeeEnabledForFund(
        address indexed comptrollerProxy,
        address indexed fee,
        bytes settingsData
    );

    event FeeRegistered(
        address indexed fee,
        string indexed identifier,
        FeeHook[] implementedHooksForSettle,
        FeeHook[] implementedHooksForUpdate,
        bool usesGavOnSettle,
        bool usesGavOnUpdate
    );

    event FeeSettledForFund(
        address indexed comptrollerProxy,
        address indexed fee,
        SettlementType indexed settlementType,
        address payer,
        address payee,
        uint256 sharesDue
    );

    event SharesOutstandingPaidForFund(
        address indexed comptrollerProxy,
        address indexed fee,
        uint256 sharesDue
    );

    event FeesRecipientSetForFund(
        address indexed comptrollerProxy,
        address prevFeesRecipient,
        address nextFeesRecipient
    );

    EnumerableSet.AddressSet private registeredFees;
    mapping(address => bool) private feeToUsesGavOnSettle;
    mapping(address => bool) private feeToUsesGavOnUpdate;
    mapping(address => mapping(FeeHook => bool)) private feeToHookToImplementsSettle;
    mapping(address => mapping(FeeHook => bool)) private feeToHookToImplementsUpdate;

    mapping(address => address[]) private comptrollerProxyToFees;
    mapping(address => mapping(address => uint256))
        private comptrollerProxyToFeeToSharesOutstanding;

    constructor(address _fundDeployer) public FundDeployerOwnerMixin(_fundDeployer) {}

    // EXTERNAL FUNCTIONS

    /// @notice Activate already-configured fees for use in the calling fund
    function activateForFund(bool) external override {
        address vaultProxy = __setValidatedVaultProxy(msg.sender);

        address[] memory enabledFees = comptrollerProxyToFees[msg.sender];
        for (uint256 i; i < enabledFees.length; i++) {
            IFee(enabledFees[i]).activateForFund(msg.sender, vaultProxy);
        }
    }

    /// @notice Deactivate fees for a fund
    /// @dev msg.sender is validated during __invokeHook()
    function deactivateForFund() external override {
        // Settle continuous fees one last time, but without calling Fee.update()
        __invokeHook(msg.sender, IFeeManager.FeeHook.Continuous, "", 0, false);

        // Force payout of remaining shares outstanding
        __forcePayoutAllSharesOutstanding(msg.sender);

        // Clean up storage
        __deleteFundStorage(msg.sender);
    }

    /// @notice Receives a dispatched `callOnExtension` from a fund's ComptrollerProxy
    /// @param _actionId An ID representing the desired action
    /// @param _callArgs Encoded arguments specific to the _actionId
    /// @dev This is the only way to call a function on this contract that updates VaultProxy state.
    /// For both of these actions, any caller is allowed, so we don't use the caller param.
    function receiveCallFromComptroller(
        address,
        uint256 _actionId,
        bytes calldata _callArgs
    ) external override {
        if (_actionId == 0) {
            // Settle and update all continuous fees
            __invokeHook(msg.sender, IFeeManager.FeeHook.Continuous, "", 0, true);
        } else if (_actionId == 1) {
            __payoutSharesOutstandingForFees(msg.sender, _callArgs);
        } else {
            revert("receiveCallFromComptroller: Invalid _actionId");
        }
    }

    /// @notice Enable and configure fees for use in the calling fund
    /// @param _configData Encoded config data
    /// @dev Caller is expected to be a valid ComptrollerProxy, but there isn't a need to validate.
    /// The order of `fees` determines the order in which fees of the same FeeHook will be applied.
    /// It is recommended to run ManagementFee before PerformanceFee in order to achieve precise
    /// PerformanceFee calcs.
    function setConfigForFund(bytes calldata _configData) external override {
        (address[] memory fees, bytes[] memory settingsData) = abi.decode(
            _configData,
            (address[], bytes[])
        );

        // Sanity checks
        require(
            fees.length == settingsData.length,
            "setConfigForFund: fees and settingsData array lengths unequal"
        );
        require(fees.isUniqueSet(), "setConfigForFund: fees cannot include duplicates");

        // Enable each fee with settings
        for (uint256 i; i < fees.length; i++) {
            require(isRegisteredFee(fees[i]), "setConfigForFund: Fee is not registered");

            // Set fund config on fee
            IFee(fees[i]).addFundSettings(msg.sender, settingsData[i]);

            // Enable fee for fund
            comptrollerProxyToFees[msg.sender].push(fees[i]);

            emit FeeEnabledForFund(msg.sender, fees[i], settingsData[i]);
        }
    }

    /// @notice Allows all fees for a particular FeeHook to implement settle() and update() logic
    /// @param _hook The FeeHook to invoke
    /// @param _settlementData The encoded settlement parameters specific to the FeeHook
    /// @param _gav The GAV for a fund if known in the invocating code, otherwise 0
    function invokeHook(
        FeeHook _hook,
        bytes calldata _settlementData,
        uint256 _gav
    ) external override {
        __invokeHook(msg.sender, _hook, _settlementData, _gav, true);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to destroy local storage to get gas refund,
    /// and to prevent further calls to fee manager
    function __deleteFundStorage(address _comptrollerProxy) private {
        delete comptrollerProxyToFees[_comptrollerProxy];
        delete comptrollerProxyToVaultProxy[_comptrollerProxy];
    }

    /// @dev Helper to force the payout of shares outstanding across all fees.
    /// For the current release, all shares in the VaultProxy are assumed to be
    /// shares outstanding from fees. If not, then they were sent there by mistake
    /// and are otherwise unrecoverable. We can therefore take the VaultProxy's
    /// shares balance as the totalSharesOutstanding to payout to the fund owner.
    function __forcePayoutAllSharesOutstanding(address _comptrollerProxy) private {
        address vaultProxy = getVaultProxyForFund(_comptrollerProxy);

        uint256 totalSharesOutstanding = ERC20(vaultProxy).balanceOf(vaultProxy);
        if (totalSharesOutstanding == 0) {
            return;
        }

        // Destroy any shares outstanding storage
        address[] memory fees = comptrollerProxyToFees[_comptrollerProxy];
        for (uint256 i; i < fees.length; i++) {
            delete comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]];
        }

        // Distribute all shares outstanding to the fees recipient
        address payee = IVault(vaultProxy).getOwner();
        __transferShares(_comptrollerProxy, vaultProxy, payee, totalSharesOutstanding);

        emit AllSharesOutstandingForcePaidForFund(
            _comptrollerProxy,
            payee,
            totalSharesOutstanding
        );
    }

    /// @dev Helper to get the canonical value of GAV if not yet set and required by fee
    function __getGavAsNecessary(
        address _comptrollerProxy,
        address _fee,
        uint256 _gavOrZero
    ) private returns (uint256 gav_) {
        if (_gavOrZero == 0 && feeUsesGavOnUpdate(_fee)) {
            // Assumes that any fee that requires GAV would need to revert if invalid or not final
            bool gavIsValid;
            (gav_, gavIsValid) = IComptroller(_comptrollerProxy).calcGav(true);
            require(gavIsValid, "__getGavAsNecessary: Invalid GAV");
        } else {
            gav_ = _gavOrZero;
        }

        return gav_;
    }

    /// @dev Helper to run settle() on all enabled fees for a fund that implement a given hook, and then to
    /// optionally run update() on the same fees. This order allows fees an opportunity to update
    /// their local state after all VaultProxy state transitions (i.e., minting, burning,
    /// transferring shares) have finished. To optimize for the expensive operation of calculating
    /// GAV, once one fee requires GAV, we recycle that `gav` value for subsequent fees.
    /// Assumes that _gav is either 0 or has already been validated.
    function __invokeHook(
        address _comptrollerProxy,
        FeeHook _hook,
        bytes memory _settlementData,
        uint256 _gavOrZero,
        bool _updateFees
    ) private {
        address[] memory fees = comptrollerProxyToFees[_comptrollerProxy];
        if (fees.length == 0) {
            return;
        }

        address vaultProxy = getVaultProxyForFund(_comptrollerProxy);

        // This check isn't strictly necessary, but its cost is insignificant,
        // and helps to preserve data integrity.
        require(vaultProxy != address(0), "__invokeHook: Fund is not active");

        // First, allow all fees to implement settle()
        uint256 gav = __settleFees(
            _comptrollerProxy,
            vaultProxy,
            fees,
            _hook,
            _settlementData,
            _gavOrZero
        );

        // Second, allow fees to implement update()
        // This function does not allow any further altering of VaultProxy state
        // (i.e., burning, minting, or transferring shares)
        if (_updateFees) {
            __updateFees(_comptrollerProxy, vaultProxy, fees, _hook, _settlementData, gav);
        }
    }

    /// @dev Helper to payout the shares outstanding for the specified fees.
    /// Does not call settle() on fees.
    /// Only callable via ComptrollerProxy.callOnExtension().
    function __payoutSharesOutstandingForFees(address _comptrollerProxy, bytes memory _callArgs)
        private
    {
        address[] memory fees = abi.decode(_callArgs, (address[]));
        address vaultProxy = getVaultProxyForFund(msg.sender);

        uint256 sharesOutstandingDue;
        for (uint256 i; i < fees.length; i++) {
            if (!IFee(fees[i]).payout(_comptrollerProxy, vaultProxy)) {
                continue;
            }


                uint256 sharesOutstandingForFee
             = comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]];
            if (sharesOutstandingForFee == 0) {
                continue;
            }

            sharesOutstandingDue = sharesOutstandingDue.add(sharesOutstandingForFee);

            // Delete shares outstanding and distribute from VaultProxy to the fees recipient
            comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][fees[i]] = 0;

            emit SharesOutstandingPaidForFund(_comptrollerProxy, fees[i], sharesOutstandingForFee);
        }

        if (sharesOutstandingDue > 0) {
            __transferShares(
                _comptrollerProxy,
                vaultProxy,
                IVault(vaultProxy).getOwner(),
                sharesOutstandingDue
            );
        }
    }

    /// @dev Helper to settle a fee
    function __settleFee(
        address _comptrollerProxy,
        address _vaultProxy,
        address _fee,
        FeeHook _hook,
        bytes memory _settlementData,
        uint256 _gav
    ) private {
        (SettlementType settlementType, address payer, uint256 sharesDue) = IFee(_fee).settle(
            _comptrollerProxy,
            _vaultProxy,
            _hook,
            _settlementData,
            _gav
        );
        if (settlementType == SettlementType.None) {
            return;
        }

        address payee;
        if (settlementType == SettlementType.Direct) {
            payee = IVault(_vaultProxy).getOwner();
            __transferShares(_comptrollerProxy, payer, payee, sharesDue);
        } else if (settlementType == SettlementType.Mint) {
            payee = IVault(_vaultProxy).getOwner();
            __mintShares(_comptrollerProxy, payee, sharesDue);
        } else if (settlementType == SettlementType.Burn) {
            __burnShares(_comptrollerProxy, payer, sharesDue);
        } else if (settlementType == SettlementType.MintSharesOutstanding) {
            comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee] = comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee]
                .add(sharesDue);

            payee = _vaultProxy;
            __mintShares(_comptrollerProxy, payee, sharesDue);
        } else if (settlementType == SettlementType.BurnSharesOutstanding) {
            comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee] = comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee]
                .sub(sharesDue);

            payer = _vaultProxy;
            __burnShares(_comptrollerProxy, payer, sharesDue);
        } else {
            revert("__settleFee: Invalid SettlementType");
        }

        emit FeeSettledForFund(_comptrollerProxy, _fee, settlementType, payer, payee, sharesDue);
    }

    /// @dev Helper to settle fees that implement a given fee hook
    function __settleFees(
        address _comptrollerProxy,
        address _vaultProxy,
        address[] memory _fees,
        FeeHook _hook,
        bytes memory _settlementData,
        uint256 _gavOrZero
    ) private returns (uint256 gav_) {
        gav_ = _gavOrZero;

        for (uint256 i; i < _fees.length; i++) {
            if (!feeSettlesOnHook(_fees[i], _hook)) {
                continue;
            }

            gav_ = __getGavAsNecessary(_comptrollerProxy, _fees[i], gav_);

            __settleFee(_comptrollerProxy, _vaultProxy, _fees[i], _hook, _settlementData, gav_);
        }

        return gav_;
    }

    /// @dev Helper to update fees that implement a given fee hook
    function __updateFees(
        address _comptrollerProxy,
        address _vaultProxy,
        address[] memory _fees,
        FeeHook _hook,
        bytes memory _settlementData,
        uint256 _gavOrZero
    ) private {
        uint256 gav = _gavOrZero;

        for (uint256 i; i < _fees.length; i++) {
            if (!feeUpdatesOnHook(_fees[i], _hook)) {
                continue;
            }

            gav = __getGavAsNecessary(_comptrollerProxy, _fees[i], gav);

            IFee(_fees[i]).update(_comptrollerProxy, _vaultProxy, _hook, _settlementData, gav);
        }
    }

    ///////////////////
    // FEES REGISTRY //
    ///////////////////

    /// @notice Remove fees from the list of registered fees
    /// @param _fees Addresses of fees to be deregistered
    function deregisterFees(address[] calldata _fees) external onlyFundDeployerOwner {
        require(_fees.length > 0, "deregisterFees: _fees cannot be empty");

        for (uint256 i; i < _fees.length; i++) {
            require(isRegisteredFee(_fees[i]), "deregisterFees: fee is not registered");

            registeredFees.remove(_fees[i]);

            emit FeeDeregistered(_fees[i], IFee(_fees[i]).identifier());
        }
    }

    /// @notice Add fees to the list of registered fees
    /// @param _fees Addresses of fees to be registered
    /// @dev Stores the hooks that a fee implements and whether each implementation uses GAV,
    /// which fronts the gas for calls to check if a hook is implemented, and guarantees
    /// that these hook implementation return values do not change post-registration.
    function registerFees(address[] calldata _fees) external onlyFundDeployerOwner {
        require(_fees.length > 0, "registerFees: _fees cannot be empty");

        for (uint256 i; i < _fees.length; i++) {
            require(!isRegisteredFee(_fees[i]), "registerFees: fee already registered");

            registeredFees.add(_fees[i]);

            IFee feeContract = IFee(_fees[i]);
            (
                FeeHook[] memory implementedHooksForSettle,
                FeeHook[] memory implementedHooksForUpdate,
                bool usesGavOnSettle,
                bool usesGavOnUpdate
            ) = feeContract.implementedHooks();

            // Stores the hooks for which each fee implements settle() and update()
            for (uint256 j; j < implementedHooksForSettle.length; j++) {
                feeToHookToImplementsSettle[_fees[i]][implementedHooksForSettle[j]] = true;
            }
            for (uint256 j; j < implementedHooksForUpdate.length; j++) {
                feeToHookToImplementsUpdate[_fees[i]][implementedHooksForUpdate[j]] = true;
            }

            // Stores whether each fee requires GAV during its implementations for settle() and update()
            if (usesGavOnSettle) {
                feeToUsesGavOnSettle[_fees[i]] = true;
            }
            if (usesGavOnUpdate) {
                feeToUsesGavOnUpdate[_fees[i]] = true;
            }

            emit FeeRegistered(
                _fees[i],
                feeContract.identifier(),
                implementedHooksForSettle,
                implementedHooksForUpdate,
                usesGavOnSettle,
                usesGavOnUpdate
            );
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Get a list of enabled fees for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return enabledFees_ An array of enabled fee addresses
    function getEnabledFeesForFund(address _comptrollerProxy)
        external
        view
        returns (address[] memory enabledFees_)
    {
        return comptrollerProxyToFees[_comptrollerProxy];
    }

    /// @notice Get the amount of shares outstanding for a particular fee for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _fee The fee address
    /// @return sharesOutstanding_ The amount of shares outstanding
    function getFeeSharesOutstandingForFund(address _comptrollerProxy, address _fee)
        external
        view
        returns (uint256 sharesOutstanding_)
    {
        return comptrollerProxyToFeeToSharesOutstanding[_comptrollerProxy][_fee];
    }

    /// @notice Get all registered fees
    /// @return registeredFees_ A list of all registered fee addresses
    function getRegisteredFees() external view returns (address[] memory registeredFees_) {
        registeredFees_ = new address[](registeredFees.length());
        for (uint256 i; i < registeredFees_.length; i++) {
            registeredFees_[i] = registeredFees.at(i);
        }

        return registeredFees_;
    }

    /// @notice Checks if a fee implements settle() on a particular hook
    /// @param _fee The address of the fee to check
    /// @param _hook The FeeHook to check
    /// @return settlesOnHook_ True if the fee settles on the given hook
    function feeSettlesOnHook(address _fee, FeeHook _hook)
        public
        view
        returns (bool settlesOnHook_)
    {
        return feeToHookToImplementsSettle[_fee][_hook];
    }

    /// @notice Checks if a fee implements update() on a particular hook
    /// @param _fee The address of the fee to check
    /// @param _hook The FeeHook to check
    /// @return updatesOnHook_ True if the fee updates on the given hook
    function feeUpdatesOnHook(address _fee, FeeHook _hook)
        public
        view
        returns (bool updatesOnHook_)
    {
        return feeToHookToImplementsUpdate[_fee][_hook];
    }

    /// @notice Checks if a fee uses GAV in its settle() implementation
    /// @param _fee The address of the fee to check
    /// @return usesGav_ True if the fee uses GAV during settle() implementation
    function feeUsesGavOnSettle(address _fee) public view returns (bool usesGav_) {
        return feeToUsesGavOnSettle[_fee];
    }

    /// @notice Checks if a fee uses GAV in its update() implementation
    /// @param _fee The address of the fee to check
    /// @return usesGav_ True if the fee uses GAV during update() implementation
    function feeUsesGavOnUpdate(address _fee) public view returns (bool usesGav_) {
        return feeToUsesGavOnUpdate[_fee];
    }

    /// @notice Check whether a fee is registered
    /// @param _fee The address of the fee to check
    /// @return isRegisteredFee_ True if the fee is registered
    function isRegisteredFee(address _fee) public view returns (bool isRegisteredFee_) {
        return registeredFees.contains(_fee);
    }
}

File 67 of 138 : PermissionedVaultActionMixin.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../core/fund/comptroller/IComptroller.sol";

/// @title PermissionedVaultActionMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for extensions that can make permissioned vault calls
abstract contract PermissionedVaultActionMixin {
    /// @notice Adds a tracked asset to the fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _asset The asset to add
    function __addTrackedAsset(address _comptrollerProxy, address _asset) internal {
        IComptroller(_comptrollerProxy).permissionedVaultAction(
            IComptroller.VaultAction.AddTrackedAsset,
            abi.encode(_asset)
        );
    }

    /// @notice Grants an allowance to a spender to use a fund's asset
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _asset The asset for which to grant an allowance
    /// @param _target The spender of the allowance
    /// @param _amount The amount of the allowance
    function __approveAssetSpender(
        address _comptrollerProxy,
        address _asset,
        address _target,
        uint256 _amount
    ) internal {
        IComptroller(_comptrollerProxy).permissionedVaultAction(
            IComptroller.VaultAction.ApproveAssetSpender,
            abi.encode(_asset, _target, _amount)
        );
    }

    /// @notice Burns fund shares for a particular account
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _target The account for which to burn shares
    /// @param _amount The amount of shares to burn
    function __burnShares(
        address _comptrollerProxy,
        address _target,
        uint256 _amount
    ) internal {
        IComptroller(_comptrollerProxy).permissionedVaultAction(
            IComptroller.VaultAction.BurnShares,
            abi.encode(_target, _amount)
        );
    }

    /// @notice Mints fund shares to a particular account
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _target The account to which to mint shares
    /// @param _amount The amount of shares to mint
    function __mintShares(
        address _comptrollerProxy,
        address _target,
        uint256 _amount
    ) internal {
        IComptroller(_comptrollerProxy).permissionedVaultAction(
            IComptroller.VaultAction.MintShares,
            abi.encode(_target, _amount)
        );
    }

    /// @notice Removes a tracked asset from the fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _asset The asset to remove
    function __removeTrackedAsset(address _comptrollerProxy, address _asset) internal {
        IComptroller(_comptrollerProxy).permissionedVaultAction(
            IComptroller.VaultAction.RemoveTrackedAsset,
            abi.encode(_asset)
        );
    }

    /// @notice Transfers fund shares from one account to another
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _from The account from which to transfer shares
    /// @param _to The account to which to transfer shares
    /// @param _amount The amount of shares to transfer
    function __transferShares(
        address _comptrollerProxy,
        address _from,
        address _to,
        uint256 _amount
    ) internal {
        IComptroller(_comptrollerProxy).permissionedVaultAction(
            IComptroller.VaultAction.TransferShares,
            abi.encode(_from, _to, _amount)
        );
    }

    /// @notice Withdraws an asset from the VaultProxy to a given account
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _asset The asset to withdraw
    /// @param _target The account to which to withdraw the asset
    /// @param _amount The amount of asset to withdraw
    function __withdrawAssetTo(
        address _comptrollerProxy,
        address _asset,
        address _target,
        uint256 _amount
    ) internal {
        IComptroller(_comptrollerProxy).permissionedVaultAction(
            IComptroller.VaultAction.WithdrawAssetTo,
            abi.encode(_asset, _target, _amount)
        );
    }
}

File 68 of 138 : FundActionsWrapper.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../core/fund/comptroller/ComptrollerLib.sol";
import "../extensions/fee-manager/FeeManager.sol";

/// @title FundActionsWrapper Contract
/// @author Enzyme Council <[email protected]>
/// @notice Logic related to funds, not necessary in the core protocol
/// @dev This contract is currently unaudited, as it does not involve any
/// exchange in value, and simply wraps other functions for convenience
contract FundActionsWrapper {
    address private immutable FEE_MANAGER;

    constructor(address _feeManager) public {
        FEE_MANAGER = _feeManager;
    }

    // EXTERNAL FUNCTIONS

    /// @notice Calculates the net value of 1 unit of shares in the fund's denomination asset
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return netShareValue_ The amount of the denomination asset per share
    /// @return isValid_ True if the conversion rates to derive the value are all valid
    /// @dev Accounts for fees outstanding. This is a convenience function for external consumption
    /// that can be used to determine the cost of purchasing shares at any given point in time.
    /// It essentially just bundles settling all fees that implement the Continuous hook and then
    /// looking up the gross share value.
    function calcNetShareValueForFund(address _comptrollerProxy)
        external
        returns (uint256 netShareValue_, bool isValid_)
    {
        ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);
        comptrollerProxyContract.callOnExtension(FEE_MANAGER, 0, "");

        return comptrollerProxyContract.calcGrossShareValue(false);
    }

    /// @notice Invokes the Continuous fee hook on all specified fees, and then attempts to payout
    /// any shares outstanding on those fees
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _fees The fees for which to run these actions
    /// @dev This is just a wrapper to execute two callOnExtension() actions atomically, in sequence.
    /// The caller must pass in the fees that they want to run this logic on.
    function invokeContinuousFeeHookAndPayoutSharesOutstandingForFund(
        address _comptrollerProxy,
        address[] calldata _fees
    ) external {
        ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);

        comptrollerProxyContract.callOnExtension(FEE_MANAGER, 0, "");
        comptrollerProxyContract.callOnExtension(FEE_MANAGER, 1, abi.encode(_fees));
    }

    // PUBLIC FUNCTIONS

    /// @notice Gets all fees that implement the `Continuous` fee hook for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return continuousFees_ The fees that implement the `Continuous` fee hook
    function getContinuousFeesForFund(address _comptrollerProxy)
        public
        view
        returns (address[] memory continuousFees_)
    {
        FeeManager feeManagerContract = FeeManager(FEE_MANAGER);

        address[] memory fees = feeManagerContract.getEnabledFeesForFund(_comptrollerProxy);

        // Count the continuous fees
        uint256 continuousFeesCount;
        bool[] memory implementsContinuousHook = new bool[](fees.length);
        for (uint256 i; i < fees.length; i++) {
            if (feeManagerContract.feeSettlesOnHook(fees[i], IFeeManager.FeeHook.Continuous)) {
                continuousFeesCount++;
                implementsContinuousHook[i] = true;
            }
        }

        // Return early if no continuous fees
        if (continuousFeesCount == 0) {
            return new address[](0);
        }

        // Create continuous fees array
        continuousFees_ = new address[](continuousFeesCount);
        uint256 continuousFeesIndex;
        for (uint256 i; i < fees.length; i++) {
            if (implementsContinuousHook[i]) {
                continuousFees_[continuousFeesIndex] = fees[i];
                continuousFeesIndex++;
            }
        }

        return continuousFees_;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `FEE_MANAGER` variable
    /// @return feeManager_ The `FEE_MANAGER` variable value
    function getFeeManager() external view returns (address feeManager_) {
        return FEE_MANAGER;
    }
}

File 69 of 138 : AuthUserExecutedSharesRequestorLib.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/token/ERC20/SafeERC20.sol";
import "../../core/fund/comptroller/ComptrollerLib.sol";
import "../../core/fund/vault/VaultLib.sol";
import "./IAuthUserExecutedSharesRequestor.sol";

/// @title AuthUserExecutedSharesRequestorLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice Provides the logic for AuthUserExecutedSharesRequestorProxy instances,
/// in which shares requests are manually executed by a permissioned user
/// @dev This will not work with a `denominationAsset` that does not transfer
/// the exact expected amount or has an elastic supply.
contract AuthUserExecutedSharesRequestorLib is IAuthUserExecutedSharesRequestor {
    using SafeERC20 for ERC20;
    using SafeMath for uint256;

    event RequestCanceled(
        address indexed requestOwner,
        uint256 investmentAmount,
        uint256 minSharesQuantity
    );

    event RequestCreated(
        address indexed requestOwner,
        uint256 investmentAmount,
        uint256 minSharesQuantity
    );

    event RequestExecuted(
        address indexed caller,
        address indexed requestOwner,
        uint256 investmentAmount,
        uint256 minSharesQuantity
    );

    event RequestExecutorAdded(address indexed account);

    event RequestExecutorRemoved(address indexed account);

    struct RequestInfo {
        uint256 investmentAmount;
        uint256 minSharesQuantity;
    }

    uint256 private constant CANCELLATION_COOLDOWN_TIMELOCK = 10 minutes;

    address private comptrollerProxy;
    address private denominationAsset;
    address private fundOwner;

    mapping(address => RequestInfo) private ownerToRequestInfo;
    mapping(address => bool) private acctToIsRequestExecutor;
    mapping(address => uint256) private ownerToLastRequestCancellation;

    modifier onlyFundOwner() {
        require(msg.sender == fundOwner, "Only fund owner callable");
        _;
    }

    /// @notice Initializes a proxy instance that uses this library
    /// @dev Serves as a per-proxy pseudo-constructor
    function init(address _comptrollerProxy) external override {
        require(comptrollerProxy == address(0), "init: Already initialized");

        comptrollerProxy = _comptrollerProxy;

        // Cache frequently-used values that require external calls
        ComptrollerLib comptrollerProxyContract = ComptrollerLib(_comptrollerProxy);
        denominationAsset = comptrollerProxyContract.getDenominationAsset();
        fundOwner = VaultLib(comptrollerProxyContract.getVaultProxy()).getOwner();
    }

    /// @notice Cancels the shares request of the caller
    function cancelRequest() external {
        RequestInfo memory request = ownerToRequestInfo[msg.sender];
        require(request.investmentAmount > 0, "cancelRequest: Request does not exist");

        // Delete the request, start the cooldown period, and return the investment asset
        delete ownerToRequestInfo[msg.sender];
        ownerToLastRequestCancellation[msg.sender] = block.timestamp;
        ERC20(denominationAsset).safeTransfer(msg.sender, request.investmentAmount);

        emit RequestCanceled(msg.sender, request.investmentAmount, request.minSharesQuantity);
    }

    /// @notice Creates a shares request for the caller
    /// @param _investmentAmount The amount of the fund's denomination asset to use to buy shares
    /// @param _minSharesQuantity The minimum quantity of shares to buy with the _investmentAmount
    function createRequest(uint256 _investmentAmount, uint256 _minSharesQuantity) external {
        require(_investmentAmount > 0, "createRequest: _investmentAmount must be > 0");
        require(
            ownerToRequestInfo[msg.sender].investmentAmount == 0,
            "createRequest: The request owner can only create one request before executed or canceled"
        );
        require(
            ownerToLastRequestCancellation[msg.sender] <
                block.timestamp.sub(CANCELLATION_COOLDOWN_TIMELOCK),
            "createRequest: Cannot create request during cancellation cooldown period"
        );

        // Create the Request and take custody of investment asset
        ownerToRequestInfo[msg.sender] = RequestInfo({
            investmentAmount: _investmentAmount,
            minSharesQuantity: _minSharesQuantity
        });
        ERC20(denominationAsset).safeTransferFrom(msg.sender, address(this), _investmentAmount);

        emit RequestCreated(msg.sender, _investmentAmount, _minSharesQuantity);
    }

    /// @notice Executes multiple shares requests
    /// @param _requestOwners The owners of the pending shares requests
    function executeRequests(address[] calldata _requestOwners) external {
        require(
            msg.sender == fundOwner || isRequestExecutor(msg.sender),
            "executeRequests: Invalid caller"
        );
        require(_requestOwners.length > 0, "executeRequests: _requestOwners can not be empty");

        (
            address[] memory buyers,
            uint256[] memory investmentAmounts,
            uint256[] memory minSharesQuantities,
            uint256 totalInvestmentAmount
        ) = __convertRequestsToBuySharesParams(_requestOwners);

        // Since ComptrollerProxy instances are fully trusted,
        // we can approve them with the max amount of the denomination asset,
        // and only top the approval back to max if ever necessary.
        address comptrollerProxyCopy = comptrollerProxy;
        ERC20 denominationAssetContract = ERC20(denominationAsset);
        if (
            denominationAssetContract.allowance(address(this), comptrollerProxyCopy) <
            totalInvestmentAmount
        ) {
            denominationAssetContract.approve(comptrollerProxyCopy, type(uint256).max);
        }

        ComptrollerLib(comptrollerProxyCopy).buyShares(
            buyers,
            investmentAmounts,
            minSharesQuantities
        );
    }

    /// @dev Helper to convert raw shares requests into the format required by buyShares().
    /// It also removes any empty requests, which is necessary to prevent a DoS attack where a user
    /// cancels their request earlier in the same block (can be repeated from multiple accounts).
    /// This function also removes shares requests and fires success events as it loops through them.
    function __convertRequestsToBuySharesParams(address[] memory _requestOwners)
        private
        returns (
            address[] memory buyers_,
            uint256[] memory investmentAmounts_,
            uint256[] memory minSharesQuantities_,
            uint256 totalInvestmentAmount_
        )
    {
        uint256 existingRequestsCount = _requestOwners.length;
        uint256[] memory allInvestmentAmounts = new uint256[](_requestOwners.length);

        // Loop through once to get the count of existing requests
        for (uint256 i; i < _requestOwners.length; i++) {
            allInvestmentAmounts[i] = ownerToRequestInfo[_requestOwners[i]].investmentAmount;

            if (allInvestmentAmounts[i] == 0) {
                existingRequestsCount--;
            }
        }

        // Loop through a second time to format requests for buyShares(),
        // and to delete the requests and emit events early so no further looping is needed.
        buyers_ = new address[](existingRequestsCount);
        investmentAmounts_ = new uint256[](existingRequestsCount);
        minSharesQuantities_ = new uint256[](existingRequestsCount);
        uint256 existingRequestsIndex;
        for (uint256 i; i < _requestOwners.length; i++) {
            if (allInvestmentAmounts[i] == 0) {
                continue;
            }

            buyers_[existingRequestsIndex] = _requestOwners[i];
            investmentAmounts_[existingRequestsIndex] = allInvestmentAmounts[i];
            minSharesQuantities_[existingRequestsIndex] = ownerToRequestInfo[_requestOwners[i]]
                .minSharesQuantity;
            totalInvestmentAmount_ = totalInvestmentAmount_.add(allInvestmentAmounts[i]);

            delete ownerToRequestInfo[_requestOwners[i]];

            emit RequestExecuted(
                msg.sender,
                buyers_[existingRequestsIndex],
                investmentAmounts_[existingRequestsIndex],
                minSharesQuantities_[existingRequestsIndex]
            );

            existingRequestsIndex++;
        }

        return (buyers_, investmentAmounts_, minSharesQuantities_, totalInvestmentAmount_);
    }

    ///////////////////////////////
    // REQUEST EXECUTOR REGISTRY //
    ///////////////////////////////

    /// @notice Adds accounts to request executors
    /// @param _requestExecutors Accounts to add
    function addRequestExecutors(address[] calldata _requestExecutors) external onlyFundOwner {
        require(_requestExecutors.length > 0, "addRequestExecutors: Empty _requestExecutors");

        for (uint256 i; i < _requestExecutors.length; i++) {
            require(
                !isRequestExecutor(_requestExecutors[i]),
                "addRequestExecutors: Value already set"
            );
            require(
                _requestExecutors[i] != fundOwner,
                "addRequestExecutors: The fund owner cannot be added"
            );

            acctToIsRequestExecutor[_requestExecutors[i]] = true;

            emit RequestExecutorAdded(_requestExecutors[i]);
        }
    }

    /// @notice Removes accounts from request executors
    /// @param _requestExecutors Accounts to remove
    function removeRequestExecutors(address[] calldata _requestExecutors) external onlyFundOwner {
        require(_requestExecutors.length > 0, "removeRequestExecutors: Empty _requestExecutors");

        for (uint256 i; i < _requestExecutors.length; i++) {
            require(
                isRequestExecutor(_requestExecutors[i]),
                "removeRequestExecutors: Account is not a request executor"
            );

            acctToIsRequestExecutor[_requestExecutors[i]] = false;

            emit RequestExecutorRemoved(_requestExecutors[i]);
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the value of `comptrollerProxy` variable
    /// @return comptrollerProxy_ The `comptrollerProxy` variable value
    function getComptrollerProxy() external view returns (address comptrollerProxy_) {
        return comptrollerProxy;
    }

    /// @notice Gets the value of `denominationAsset` variable
    /// @return denominationAsset_ The `denominationAsset` variable value
    function getDenominationAsset() external view returns (address denominationAsset_) {
        return denominationAsset;
    }

    /// @notice Gets the value of `fundOwner` variable
    /// @return fundOwner_ The `fundOwner` variable value
    function getFundOwner() external view returns (address fundOwner_) {
        return fundOwner;
    }

    /// @notice Gets the request info of a user
    /// @param _requestOwner The address of the user that creates the request
    /// @return requestInfo_ The request info created by the user
    function getSharesRequestInfoForOwner(address _requestOwner)
        external
        view
        returns (RequestInfo memory requestInfo_)
    {
        return ownerToRequestInfo[_requestOwner];
    }

    /// @notice Checks whether an account is a request executor
    /// @param _who The account to check
    /// @return isRequestExecutor_ True if _who is a request executor
    function isRequestExecutor(address _who) public view returns (bool isRequestExecutor_) {
        return acctToIsRequestExecutor[_who];
    }
}

File 70 of 138 : IAuthUserExecutedSharesRequestor.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IAuthUserExecutedSharesRequestor Interface
/// @author Enzyme Council <[email protected]>
interface IAuthUserExecutedSharesRequestor {
    function init(address) external;
}

File 71 of 138 : AuthUserExecutedSharesRequestorFactory.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../core/fund/comptroller/ComptrollerLib.sol";
import "../../core/fund/vault/VaultLib.sol";
import "./AuthUserExecutedSharesRequestorProxy.sol";
import "./IAuthUserExecutedSharesRequestor.sol";

/// @title AuthUserExecutedSharesRequestorFactory Contract
/// @author Enzyme Council <[email protected]>
/// @notice Deploys and maintains a record of AuthUserExecutedSharesRequestorProxy instances
contract AuthUserExecutedSharesRequestorFactory {
    event SharesRequestorProxyDeployed(
        address indexed comptrollerProxy,
        address sharesRequestorProxy
    );

    address private immutable AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB;
    address private immutable DISPATCHER;

    mapping(address => address) private comptrollerProxyToSharesRequestorProxy;

    constructor(address _dispatcher, address _authUserExecutedSharesRequestorLib) public {
        AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB = _authUserExecutedSharesRequestorLib;
        DISPATCHER = _dispatcher;
    }

    /// @notice Deploys a shares requestor proxy instance for a given ComptrollerProxy instance
    /// @param _comptrollerProxy The ComptrollerProxy for which to deploy the shares requestor proxy
    /// @return sharesRequestorProxy_ The address of the newly-deployed shares requestor proxy
    function deploySharesRequestorProxy(address _comptrollerProxy)
        external
        returns (address sharesRequestorProxy_)
    {
        // Confirm fund is genuine
        VaultLib vaultProxyContract = VaultLib(ComptrollerLib(_comptrollerProxy).getVaultProxy());
        require(
            vaultProxyContract.getAccessor() == _comptrollerProxy,
            "deploySharesRequestorProxy: Invalid VaultProxy for ComptrollerProxy"
        );
        require(
            IDispatcher(DISPATCHER).getFundDeployerForVaultProxy(address(vaultProxyContract)) !=
                address(0),
            "deploySharesRequestorProxy: Not a genuine fund"
        );

        // Validate that the caller is the fund owner
        require(
            msg.sender == vaultProxyContract.getOwner(),
            "deploySharesRequestorProxy: Only fund owner callable"
        );

        // Validate that a proxy does not already exist
        require(
            comptrollerProxyToSharesRequestorProxy[_comptrollerProxy] == address(0),
            "deploySharesRequestorProxy: Proxy already exists"
        );

        // Deploy the proxy
        bytes memory constructData = abi.encodeWithSelector(
            IAuthUserExecutedSharesRequestor.init.selector,
            _comptrollerProxy
        );
        sharesRequestorProxy_ = address(
            new AuthUserExecutedSharesRequestorProxy(
                constructData,
                AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB
            )
        );

        comptrollerProxyToSharesRequestorProxy[_comptrollerProxy] = sharesRequestorProxy_;

        emit SharesRequestorProxyDeployed(_comptrollerProxy, sharesRequestorProxy_);

        return sharesRequestorProxy_;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the value of the `AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB` variable
    /// @return authUserExecutedSharesRequestorLib_ The `AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB` variable value
    function getAuthUserExecutedSharesRequestorLib()
        external
        view
        returns (address authUserExecutedSharesRequestorLib_)
    {
        return AUTH_USER_EXECUTED_SHARES_REQUESTOR_LIB;
    }

    /// @notice Gets the value of the `DISPATCHER` variable
    /// @return dispatcher_ The `DISPATCHER` variable value
    function getDispatcher() external view returns (address dispatcher_) {
        return DISPATCHER;
    }

    /// @notice Gets the AuthUserExecutedSharesRequestorProxy associated with the given ComptrollerProxy
    /// @param _comptrollerProxy The ComptrollerProxy for which to get the associated AuthUserExecutedSharesRequestorProxy
    /// @return sharesRequestorProxy_ The associated AuthUserExecutedSharesRequestorProxy address
    function getSharesRequestorProxyForComptrollerProxy(address _comptrollerProxy)
        external
        view
        returns (address sharesRequestorProxy_)
    {
        return comptrollerProxyToSharesRequestorProxy[_comptrollerProxy];
    }
}

File 72 of 138 : AuthUserExecutedSharesRequestorProxy.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../utils/Proxy.sol";

contract AuthUserExecutedSharesRequestorProxy is Proxy {
    constructor(bytes memory _constructData, address _authUserExecutedSharesRequestorLib)
        public
        Proxy(_constructData, _authUserExecutedSharesRequestorLib)
    {}
}

File 73 of 138 : Proxy.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title Proxy Contract
/// @author Enzyme Council <[email protected]>
/// @notice A proxy contract for all Proxy instances
/// @dev The recommended implementation of a Proxy in EIP-1822, updated for solc 0.6.12,
/// and using the EIP-1967 storage slot for the proxiable implementation.
/// i.e., `bytes32(uint256(keccak256('eip1967.proxy.implementation')) - 1)`, which is
/// "0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc"
/// See: https://eips.ethereum.org/EIPS/eip-1822
contract Proxy {
    constructor(bytes memory _constructData, address _contractLogic) public {
        assembly {
            sstore(
                0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc,
                _contractLogic
            )
        }
        (bool success, bytes memory returnData) = _contractLogic.delegatecall(_constructData);
        require(success, string(returnData));
    }

    fallback() external payable {
        assembly {
            let contractLogic := sload(
                0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc
            )
            calldatacopy(0x0, 0x0, calldatasize())
            let success := delegatecall(
                sub(gas(), 10000),
                contractLogic,
                0x0,
                calldatasize(),
                0,
                0
            )
            let retSz := returndatasize()
            returndatacopy(0, 0, retSz)
            switch success
                case 0 {
                    revert(0, retSz)
                }
                default {
                    return(0, retSz)
                }
        }
    }
}

File 74 of 138 : ComptrollerProxy.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../utils/Proxy.sol";

/// @title ComptrollerProxy Contract
/// @author Enzyme Council <[email protected]>
/// @notice A proxy contract for all ComptrollerProxy instances
contract ComptrollerProxy is Proxy {
    constructor(bytes memory _constructData, address _comptrollerLib)
        public
        Proxy(_constructData, _comptrollerLib)
    {}
}

File 75 of 138 : FundDeployer.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "../../../persistent/dispatcher/IDispatcher.sol";
import "../../../persistent/utils/IMigrationHookHandler.sol";
import "../fund/comptroller/IComptroller.sol";
import "../fund/comptroller/ComptrollerProxy.sol";
import "../fund/vault/IVault.sol";
import "./IFundDeployer.sol";

/// @title FundDeployer Contract
/// @author Enzyme Council <[email protected]>
/// @notice The top-level contract of the release.
/// It primarily coordinates fund deployment and fund migration, but
/// it is also deferred to for contract access control and for allowed calls
/// that can be made with a fund's VaultProxy as the msg.sender.
contract FundDeployer is IFundDeployer, IMigrationHookHandler {
    event ComptrollerLibSet(address comptrollerLib);

    event ComptrollerProxyDeployed(
        address indexed creator,
        address comptrollerProxy,
        address indexed denominationAsset,
        uint256 sharesActionTimelock,
        bytes feeManagerConfigData,
        bytes policyManagerConfigData,
        bool indexed forMigration
    );

    event NewFundCreated(
        address indexed creator,
        address comptrollerProxy,
        address vaultProxy,
        address indexed fundOwner,
        string fundName,
        address indexed denominationAsset,
        uint256 sharesActionTimelock,
        bytes feeManagerConfigData,
        bytes policyManagerConfigData
    );

    event ReleaseStatusSet(ReleaseStatus indexed prevStatus, ReleaseStatus indexed nextStatus);

    event VaultCallDeregistered(address indexed contractAddress, bytes4 selector);

    event VaultCallRegistered(address indexed contractAddress, bytes4 selector);

    // Constants
    address private immutable CREATOR;
    address private immutable DISPATCHER;
    address private immutable VAULT_LIB;

    // Pseudo-constants (can only be set once)
    address private comptrollerLib;

    // Storage
    ReleaseStatus private releaseStatus;
    mapping(address => mapping(bytes4 => bool)) private contractToSelectorToIsRegisteredVaultCall;
    mapping(address => address) private pendingComptrollerProxyToCreator;

    modifier onlyLiveRelease() {
        require(releaseStatus == ReleaseStatus.Live, "Release is not Live");
        _;
    }

    modifier onlyMigrator(address _vaultProxy) {
        require(
            IVault(_vaultProxy).canMigrate(msg.sender),
            "Only a permissioned migrator can call this function"
        );
        _;
    }

    modifier onlyOwner() {
        require(msg.sender == getOwner(), "Only the contract owner can call this function");
        _;
    }

    modifier onlyPendingComptrollerProxyCreator(address _comptrollerProxy) {
        require(
            msg.sender == pendingComptrollerProxyToCreator[_comptrollerProxy],
            "Only the ComptrollerProxy creator can call this function"
        );
        _;
    }

    constructor(
        address _dispatcher,
        address _vaultLib,
        address[] memory _vaultCallContracts,
        bytes4[] memory _vaultCallSelectors
    ) public {
        if (_vaultCallContracts.length > 0) {
            __registerVaultCalls(_vaultCallContracts, _vaultCallSelectors);
        }
        CREATOR = msg.sender;
        DISPATCHER = _dispatcher;
        VAULT_LIB = _vaultLib;
    }

    /////////////
    // GENERAL //
    /////////////

    /// @notice Sets the comptrollerLib
    /// @param _comptrollerLib The ComptrollerLib contract address
    /// @dev Can only be set once
    function setComptrollerLib(address _comptrollerLib) external onlyOwner {
        require(
            comptrollerLib == address(0),
            "setComptrollerLib: This value can only be set once"
        );

        comptrollerLib = _comptrollerLib;

        emit ComptrollerLibSet(_comptrollerLib);
    }

    /// @notice Sets the status of the protocol to a new state
    /// @param _nextStatus The next status state to set
    function setReleaseStatus(ReleaseStatus _nextStatus) external {
        require(
            msg.sender == IDispatcher(DISPATCHER).getOwner(),
            "setReleaseStatus: Only the Dispatcher owner can call this function"
        );
        require(
            _nextStatus != ReleaseStatus.PreLaunch,
            "setReleaseStatus: Cannot return to PreLaunch status"
        );
        require(
            comptrollerLib != address(0),
            "setReleaseStatus: Can only set the release status when comptrollerLib is set"
        );

        ReleaseStatus prevStatus = releaseStatus;
        require(_nextStatus != prevStatus, "setReleaseStatus: _nextStatus is the current status");

        releaseStatus = _nextStatus;

        emit ReleaseStatusSet(prevStatus, _nextStatus);
    }

    /// @notice Gets the current owner of the contract
    /// @return owner_ The contract owner address
    /// @dev Dynamically gets the owner based on the Protocol status. The owner is initially the
    /// contract's deployer, for convenience in setting up configuration.
    /// Ownership is claimed when the owner of the Dispatcher contract (the Enzyme Council)
    /// sets the releaseStatus to `Live`.
    function getOwner() public view override returns (address owner_) {
        if (releaseStatus == ReleaseStatus.PreLaunch) {
            return CREATOR;
        }

        return IDispatcher(DISPATCHER).getOwner();
    }

    ///////////////////
    // FUND CREATION //
    ///////////////////

    /// @notice Creates a fully-configured ComptrollerProxy, to which a fund from a previous
    /// release can migrate in a subsequent step
    /// @param _denominationAsset The contract address of the denomination asset for the fund
    /// @param _sharesActionTimelock The minimum number of seconds between any two "shares actions"
    /// (buying or selling shares) by the same user
    /// @param _feeManagerConfigData Bytes data for the fees to be enabled for the fund
    /// @param _policyManagerConfigData Bytes data for the policies to be enabled for the fund
    /// @return comptrollerProxy_ The address of the ComptrollerProxy deployed during this action
    function createMigratedFundConfig(
        address _denominationAsset,
        uint256 _sharesActionTimelock,
        bytes calldata _feeManagerConfigData,
        bytes calldata _policyManagerConfigData
    ) external onlyLiveRelease returns (address comptrollerProxy_) {
        comptrollerProxy_ = __deployComptrollerProxy(
            _denominationAsset,
            _sharesActionTimelock,
            _feeManagerConfigData,
            _policyManagerConfigData,
            true
        );

        pendingComptrollerProxyToCreator[comptrollerProxy_] = msg.sender;

        return comptrollerProxy_;
    }

    /// @notice Creates a new fund
    /// @param _fundOwner The address of the owner for the fund
    /// @param _fundName The name of the fund
    /// @param _denominationAsset The contract address of the denomination asset for the fund
    /// @param _sharesActionTimelock The minimum number of seconds between any two "shares actions"
    /// (buying or selling shares) by the same user
    /// @param _feeManagerConfigData Bytes data for the fees to be enabled for the fund
    /// @param _policyManagerConfigData Bytes data for the policies to be enabled for the fund
    /// @return comptrollerProxy_ The address of the ComptrollerProxy deployed during this action
    function createNewFund(
        address _fundOwner,
        string calldata _fundName,
        address _denominationAsset,
        uint256 _sharesActionTimelock,
        bytes calldata _feeManagerConfigData,
        bytes calldata _policyManagerConfigData
    ) external onlyLiveRelease returns (address comptrollerProxy_, address vaultProxy_) {
        return
            __createNewFund(
                _fundOwner,
                _fundName,
                _denominationAsset,
                _sharesActionTimelock,
                _feeManagerConfigData,
                _policyManagerConfigData
            );
    }

    /// @dev Helper to avoid the stack-too-deep error during createNewFund
    function __createNewFund(
        address _fundOwner,
        string memory _fundName,
        address _denominationAsset,
        uint256 _sharesActionTimelock,
        bytes memory _feeManagerConfigData,
        bytes memory _policyManagerConfigData
    ) private returns (address comptrollerProxy_, address vaultProxy_) {
        require(_fundOwner != address(0), "__createNewFund: _owner cannot be empty");

        comptrollerProxy_ = __deployComptrollerProxy(
            _denominationAsset,
            _sharesActionTimelock,
            _feeManagerConfigData,
            _policyManagerConfigData,
            false
        );

        vaultProxy_ = IDispatcher(DISPATCHER).deployVaultProxy(
            VAULT_LIB,
            _fundOwner,
            comptrollerProxy_,
            _fundName
        );

        IComptroller(comptrollerProxy_).activate(vaultProxy_, false);

        emit NewFundCreated(
            msg.sender,
            comptrollerProxy_,
            vaultProxy_,
            _fundOwner,
            _fundName,
            _denominationAsset,
            _sharesActionTimelock,
            _feeManagerConfigData,
            _policyManagerConfigData
        );

        return (comptrollerProxy_, vaultProxy_);
    }

    /// @dev Helper function to deploy a configured ComptrollerProxy
    function __deployComptrollerProxy(
        address _denominationAsset,
        uint256 _sharesActionTimelock,
        bytes memory _feeManagerConfigData,
        bytes memory _policyManagerConfigData,
        bool _forMigration
    ) private returns (address comptrollerProxy_) {
        require(
            _denominationAsset != address(0),
            "__deployComptrollerProxy: _denominationAsset cannot be empty"
        );

        bytes memory constructData = abi.encodeWithSelector(
            IComptroller.init.selector,
            _denominationAsset,
            _sharesActionTimelock
        );
        comptrollerProxy_ = address(new ComptrollerProxy(constructData, comptrollerLib));

        if (_feeManagerConfigData.length > 0 || _policyManagerConfigData.length > 0) {
            IComptroller(comptrollerProxy_).configureExtensions(
                _feeManagerConfigData,
                _policyManagerConfigData
            );
        }

        emit ComptrollerProxyDeployed(
            msg.sender,
            comptrollerProxy_,
            _denominationAsset,
            _sharesActionTimelock,
            _feeManagerConfigData,
            _policyManagerConfigData,
            _forMigration
        );

        return comptrollerProxy_;
    }

    //////////////////
    // MIGRATION IN //
    //////////////////

    /// @notice Cancels fund migration
    /// @param _vaultProxy The VaultProxy for which to cancel migration
    function cancelMigration(address _vaultProxy) external {
        __cancelMigration(_vaultProxy, false);
    }

    /// @notice Cancels fund migration, bypassing any failures.
    /// Should be used in an emergency only.
    /// @param _vaultProxy The VaultProxy for which to cancel migration
    function cancelMigrationEmergency(address _vaultProxy) external {
        __cancelMigration(_vaultProxy, true);
    }

    /// @notice Executes fund migration
    /// @param _vaultProxy The VaultProxy for which to execute the migration
    function executeMigration(address _vaultProxy) external {
        __executeMigration(_vaultProxy, false);
    }

    /// @notice Executes fund migration, bypassing any failures.
    /// Should be used in an emergency only.
    /// @param _vaultProxy The VaultProxy for which to execute the migration
    function executeMigrationEmergency(address _vaultProxy) external {
        __executeMigration(_vaultProxy, true);
    }

    /// @dev Unimplemented
    function invokeMigrationInCancelHook(
        address,
        address,
        address,
        address
    ) external virtual override {
        return;
    }

    /// @notice Signal a fund migration
    /// @param _vaultProxy The VaultProxy for which to signal the migration
    /// @param _comptrollerProxy The ComptrollerProxy for which to signal the migration
    function signalMigration(address _vaultProxy, address _comptrollerProxy) external {
        __signalMigration(_vaultProxy, _comptrollerProxy, false);
    }

    /// @notice Signal a fund migration, bypassing any failures.
    /// Should be used in an emergency only.
    /// @param _vaultProxy The VaultProxy for which to signal the migration
    /// @param _comptrollerProxy The ComptrollerProxy for which to signal the migration
    function signalMigrationEmergency(address _vaultProxy, address _comptrollerProxy) external {
        __signalMigration(_vaultProxy, _comptrollerProxy, true);
    }

    /// @dev Helper to cancel a migration
    function __cancelMigration(address _vaultProxy, bool _bypassFailure)
        private
        onlyLiveRelease
        onlyMigrator(_vaultProxy)
    {
        IDispatcher(DISPATCHER).cancelMigration(_vaultProxy, _bypassFailure);
    }

    /// @dev Helper to execute a migration
    function __executeMigration(address _vaultProxy, bool _bypassFailure)
        private
        onlyLiveRelease
        onlyMigrator(_vaultProxy)
    {
        IDispatcher dispatcherContract = IDispatcher(DISPATCHER);

        (, address comptrollerProxy, , ) = dispatcherContract
            .getMigrationRequestDetailsForVaultProxy(_vaultProxy);

        dispatcherContract.executeMigration(_vaultProxy, _bypassFailure);

        IComptroller(comptrollerProxy).activate(_vaultProxy, true);

        delete pendingComptrollerProxyToCreator[comptrollerProxy];
    }

    /// @dev Helper to signal a migration
    function __signalMigration(
        address _vaultProxy,
        address _comptrollerProxy,
        bool _bypassFailure
    )
        private
        onlyLiveRelease
        onlyPendingComptrollerProxyCreator(_comptrollerProxy)
        onlyMigrator(_vaultProxy)
    {
        IDispatcher(DISPATCHER).signalMigration(
            _vaultProxy,
            _comptrollerProxy,
            VAULT_LIB,
            _bypassFailure
        );
    }

    ///////////////////
    // MIGRATION OUT //
    ///////////////////

    /// @notice Allows "hooking into" specific moments in the migration pipeline
    /// to execute arbitrary logic during a migration out of this release
    /// @param _vaultProxy The VaultProxy being migrated
    function invokeMigrationOutHook(
        MigrationOutHook _hook,
        address _vaultProxy,
        address,
        address,
        address
    ) external override {
        if (_hook != MigrationOutHook.PreMigrate) {
            return;
        }

        require(
            msg.sender == DISPATCHER,
            "postMigrateOriginHook: Only Dispatcher can call this function"
        );

        // Must use PreMigrate hook to get the ComptrollerProxy from the VaultProxy
        address comptrollerProxy = IVault(_vaultProxy).getAccessor();

        // Wind down fund and destroy its config
        IComptroller(comptrollerProxy).destruct();
    }

    //////////////
    // REGISTRY //
    //////////////

    /// @notice De-registers allowed arbitrary contract calls that can be sent from the VaultProxy
    /// @param _contracts The contracts of the calls to de-register
    /// @param _selectors The selectors of the calls to de-register
    function deregisterVaultCalls(address[] calldata _contracts, bytes4[] calldata _selectors)
        external
        onlyOwner
    {
        require(_contracts.length > 0, "deregisterVaultCalls: Empty _contracts");
        require(
            _contracts.length == _selectors.length,
            "deregisterVaultCalls: Uneven input arrays"
        );

        for (uint256 i; i < _contracts.length; i++) {
            require(
                isRegisteredVaultCall(_contracts[i], _selectors[i]),
                "deregisterVaultCalls: Call not registered"
            );

            contractToSelectorToIsRegisteredVaultCall[_contracts[i]][_selectors[i]] = false;

            emit VaultCallDeregistered(_contracts[i], _selectors[i]);
        }
    }

    /// @notice Registers allowed arbitrary contract calls that can be sent from the VaultProxy
    /// @param _contracts The contracts of the calls to register
    /// @param _selectors The selectors of the calls to register
    function registerVaultCalls(address[] calldata _contracts, bytes4[] calldata _selectors)
        external
        onlyOwner
    {
        require(_contracts.length > 0, "registerVaultCalls: Empty _contracts");

        __registerVaultCalls(_contracts, _selectors);
    }

    /// @dev Helper to register allowed vault calls
    function __registerVaultCalls(address[] memory _contracts, bytes4[] memory _selectors)
        private
    {
        require(
            _contracts.length == _selectors.length,
            "__registerVaultCalls: Uneven input arrays"
        );

        for (uint256 i; i < _contracts.length; i++) {
            require(
                !isRegisteredVaultCall(_contracts[i], _selectors[i]),
                "__registerVaultCalls: Call already registered"
            );

            contractToSelectorToIsRegisteredVaultCall[_contracts[i]][_selectors[i]] = true;

            emit VaultCallRegistered(_contracts[i], _selectors[i]);
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `comptrollerLib` variable value
    /// @return comptrollerLib_ The `comptrollerLib` variable value
    function getComptrollerLib() external view returns (address comptrollerLib_) {
        return comptrollerLib;
    }

    /// @notice Gets the `CREATOR` variable value
    /// @return creator_ The `CREATOR` variable value
    function getCreator() external view returns (address creator_) {
        return CREATOR;
    }

    /// @notice Gets the `DISPATCHER` variable value
    /// @return dispatcher_ The `DISPATCHER` variable value
    function getDispatcher() external view returns (address dispatcher_) {
        return DISPATCHER;
    }

    /// @notice Gets the creator of a pending ComptrollerProxy
    /// @return pendingComptrollerProxyCreator_ The pending ComptrollerProxy creator
    function getPendingComptrollerProxyCreator(address _comptrollerProxy)
        external
        view
        returns (address pendingComptrollerProxyCreator_)
    {
        return pendingComptrollerProxyToCreator[_comptrollerProxy];
    }

    /// @notice Gets the `releaseStatus` variable value
    /// @return status_ The `releaseStatus` variable value
    function getReleaseStatus() external view override returns (ReleaseStatus status_) {
        return releaseStatus;
    }

    /// @notice Gets the `VAULT_LIB` variable value
    /// @return vaultLib_ The `VAULT_LIB` variable value
    function getVaultLib() external view returns (address vaultLib_) {
        return VAULT_LIB;
    }

    /// @notice Checks if a contract call is registered
    /// @param _contract The contract of the call to check
    /// @param _selector The selector of the call to check
    /// @return isRegistered_ True if the call is registered
    function isRegisteredVaultCall(address _contract, bytes4 _selector)
        public
        view
        override
        returns (bool isRegistered_)
    {
        return contractToSelectorToIsRegisteredVaultCall[_contract][_selector];
    }
}

File 76 of 138 : IMigrationHookHandler.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title IMigrationHookHandler Interface
/// @author Enzyme Council <[email protected]>
interface IMigrationHookHandler {
    enum MigrationOutHook {PreSignal, PostSignal, PreMigrate, PostMigrate, PostCancel}

    function invokeMigrationInCancelHook(
        address _vaultProxy,
        address _prevFundDeployer,
        address _nextVaultAccessor,
        address _nextVaultLib
    ) external;

    function invokeMigrationOutHook(
        MigrationOutHook _hook,
        address _vaultProxy,
        address _nextFundDeployer,
        address _nextVaultAccessor,
        address _nextVaultLib
    ) external;
}

File 77 of 138 : IntegrationManager.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/utils/EnumerableSet.sol";
import "../../core/fund/vault/IVault.sol";
import "../../infrastructure/price-feeds/derivatives/IDerivativePriceFeed.sol";
import "../../infrastructure/price-feeds/primitives/IPrimitivePriceFeed.sol";
import "../../utils/AddressArrayLib.sol";
import "../../utils/AssetFinalityResolver.sol";
import "../policy-manager/IPolicyManager.sol";
import "../utils/ExtensionBase.sol";
import "../utils/FundDeployerOwnerMixin.sol";
import "../utils/PermissionedVaultActionMixin.sol";
import "./integrations/IIntegrationAdapter.sol";
import "./IIntegrationManager.sol";

/// @title IntegrationManager
/// @author Enzyme Council <[email protected]>
/// @notice Extension to handle DeFi integration actions for funds
contract IntegrationManager is
    IIntegrationManager,
    ExtensionBase,
    FundDeployerOwnerMixin,
    PermissionedVaultActionMixin,
    AssetFinalityResolver
{
    using AddressArrayLib for address[];
    using EnumerableSet for EnumerableSet.AddressSet;
    using SafeMath for uint256;

    event AdapterDeregistered(address indexed adapter, string indexed identifier);

    event AdapterRegistered(address indexed adapter, string indexed identifier);

    event AuthUserAddedForFund(address indexed comptrollerProxy, address indexed account);

    event AuthUserRemovedForFund(address indexed comptrollerProxy, address indexed account);

    event CallOnIntegrationExecutedForFund(
        address indexed comptrollerProxy,
        address vaultProxy,
        address caller,
        address indexed adapter,
        bytes4 indexed selector,
        bytes integrationData,
        address[] incomingAssets,
        uint256[] incomingAssetAmounts,
        address[] outgoingAssets,
        uint256[] outgoingAssetAmounts
    );

    address private immutable DERIVATIVE_PRICE_FEED;
    address private immutable POLICY_MANAGER;
    address private immutable PRIMITIVE_PRICE_FEED;

    EnumerableSet.AddressSet private registeredAdapters;

    mapping(address => mapping(address => bool)) private comptrollerProxyToAcctToIsAuthUser;

    constructor(
        address _fundDeployer,
        address _policyManager,
        address _derivativePriceFeed,
        address _primitivePriceFeed,
        address _synthetixPriceFeed,
        address _synthetixAddressResolver
    )
        public
        FundDeployerOwnerMixin(_fundDeployer)
        AssetFinalityResolver(_synthetixPriceFeed, _synthetixAddressResolver)
    {
        DERIVATIVE_PRICE_FEED = _derivativePriceFeed;
        POLICY_MANAGER = _policyManager;
        PRIMITIVE_PRICE_FEED = _primitivePriceFeed;
    }

    /////////////
    // GENERAL //
    /////////////

    /// @notice Activates the extension by storing the VaultProxy
    function activateForFund(bool) external override {
        __setValidatedVaultProxy(msg.sender);
    }

    /// @notice Authorizes a user to act on behalf of a fund via the IntegrationManager
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _who The user to authorize
    function addAuthUserForFund(address _comptrollerProxy, address _who) external {
        __validateSetAuthUser(_comptrollerProxy, _who, true);

        comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who] = true;

        emit AuthUserAddedForFund(_comptrollerProxy, _who);
    }

    /// @notice Deactivate the extension by destroying storage
    function deactivateForFund() external override {
        delete comptrollerProxyToVaultProxy[msg.sender];
    }

    /// @notice Removes an authorized user from the IntegrationManager for the given fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _who The authorized user to remove
    function removeAuthUserForFund(address _comptrollerProxy, address _who) external {
        __validateSetAuthUser(_comptrollerProxy, _who, false);

        comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who] = false;

        emit AuthUserRemovedForFund(_comptrollerProxy, _who);
    }

    /// @notice Checks whether an account is an authorized IntegrationManager user for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _who The account to check
    /// @return isAuthUser_ True if the account is an authorized user or the fund owner
    function isAuthUserForFund(address _comptrollerProxy, address _who)
        public
        view
        returns (bool isAuthUser_)
    {
        return
            comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who] ||
            _who == IVault(comptrollerProxyToVaultProxy[_comptrollerProxy]).getOwner();
    }

    /// @dev Helper to validate calls to update comptrollerProxyToAcctToIsAuthUser
    function __validateSetAuthUser(
        address _comptrollerProxy,
        address _who,
        bool _nextIsAuthUser
    ) private view {
        require(
            comptrollerProxyToVaultProxy[_comptrollerProxy] != address(0),
            "__validateSetAuthUser: Fund has not been activated"
        );

        address fundOwner = IVault(comptrollerProxyToVaultProxy[_comptrollerProxy]).getOwner();
        require(
            msg.sender == fundOwner,
            "__validateSetAuthUser: Only the fund owner can call this function"
        );
        require(_who != fundOwner, "__validateSetAuthUser: Cannot set for the fund owner");

        if (_nextIsAuthUser) {
            require(
                !comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who],
                "__validateSetAuthUser: Account is already an authorized user"
            );
        } else {
            require(
                comptrollerProxyToAcctToIsAuthUser[_comptrollerProxy][_who],
                "__validateSetAuthUser: Account is not an authorized user"
            );
        }
    }

    ///////////////////////////////
    // CALL-ON-EXTENSION ACTIONS //
    ///////////////////////////////

    /// @notice Receives a dispatched `callOnExtension` from a fund's ComptrollerProxy
    /// @param _caller The user who called for this action
    /// @param _actionId An ID representing the desired action
    /// @param _callArgs The encoded args for the action
    function receiveCallFromComptroller(
        address _caller,
        uint256 _actionId,
        bytes calldata _callArgs
    ) external override {
        // Since we validate and store the ComptrollerProxy-VaultProxy pairing during
        // activateForFund(), this function does not require further validation of the
        // sending ComptrollerProxy
        address vaultProxy = comptrollerProxyToVaultProxy[msg.sender];
        require(vaultProxy != address(0), "receiveCallFromComptroller: Fund is not active");
        require(
            isAuthUserForFund(msg.sender, _caller),
            "receiveCallFromComptroller: Not an authorized user"
        );

        // Dispatch the action
        if (_actionId == 0) {
            __callOnIntegration(_caller, vaultProxy, _callArgs);
        } else if (_actionId == 1) {
            __addZeroBalanceTrackedAssets(vaultProxy, _callArgs);
        } else if (_actionId == 2) {
            __removeZeroBalanceTrackedAssets(vaultProxy, _callArgs);
        } else {
            revert("receiveCallFromComptroller: Invalid _actionId");
        }
    }

    /// @dev Adds assets with a zero balance as tracked assets of the fund
    function __addZeroBalanceTrackedAssets(address _vaultProxy, bytes memory _callArgs) private {
        address[] memory assets = abi.decode(_callArgs, (address[]));
        for (uint256 i; i < assets.length; i++) {
            require(
                __finalizeIfSynthAndGetAssetBalance(_vaultProxy, assets[i], true) == 0,
                "__addZeroBalanceTrackedAssets: Balance is not zero"
            );

            __addTrackedAsset(msg.sender, assets[i]);
        }
    }

    /// @dev Removes assets with a zero balance from tracked assets of the fund
    function __removeZeroBalanceTrackedAssets(address _vaultProxy, bytes memory _callArgs)
        private
    {
        address[] memory assets = abi.decode(_callArgs, (address[]));
        address denominationAsset = IComptroller(msg.sender).getDenominationAsset();
        for (uint256 i; i < assets.length; i++) {
            require(
                assets[i] != denominationAsset,
                "__removeZeroBalanceTrackedAssets: Cannot remove denomination asset"
            );
            require(
                __finalizeIfSynthAndGetAssetBalance(_vaultProxy, assets[i], true) == 0,
                "__removeZeroBalanceTrackedAssets: Balance is not zero"
            );

            __removeTrackedAsset(msg.sender, assets[i]);
        }
    }

    /////////////////////////
    // CALL ON INTEGRATION //
    /////////////////////////

    /// @notice Universal method for calling third party contract functions through adapters
    /// @param _caller The caller of this function via the ComptrollerProxy
    /// @param _vaultProxy The VaultProxy of the fund
    /// @param _callArgs The encoded args for this function
    /// - _adapter Adapter of the integration on which to execute a call
    /// - _selector Method selector of the adapter method to execute
    /// - _integrationData Encoded arguments specific to the adapter
    /// @dev msg.sender is the ComptrollerProxy.
    /// Refer to specific adapter to see how to encode its arguments.
    function __callOnIntegration(
        address _caller,
        address _vaultProxy,
        bytes memory _callArgs
    ) private {
        (
            address adapter,
            bytes4 selector,
            bytes memory integrationData
        ) = __decodeCallOnIntegrationArgs(_callArgs);

        __preCoIHook(adapter, selector);

        /// Passing decoded _callArgs leads to stack-too-deep error
        (
            address[] memory incomingAssets,
            uint256[] memory incomingAssetAmounts,
            address[] memory outgoingAssets,
            uint256[] memory outgoingAssetAmounts
        ) = __callOnIntegrationInner(_vaultProxy, _callArgs);

        __postCoIHook(
            adapter,
            selector,
            incomingAssets,
            incomingAssetAmounts,
            outgoingAssets,
            outgoingAssetAmounts
        );

        __emitCoIEvent(
            _vaultProxy,
            _caller,
            adapter,
            selector,
            integrationData,
            incomingAssets,
            incomingAssetAmounts,
            outgoingAssets,
            outgoingAssetAmounts
        );
    }

    /// @dev Helper to execute the bulk of logic of callOnIntegration.
    /// Avoids the stack-too-deep-error.
    function __callOnIntegrationInner(address vaultProxy, bytes memory _callArgs)
        private
        returns (
            address[] memory incomingAssets_,
            uint256[] memory incomingAssetAmounts_,
            address[] memory outgoingAssets_,
            uint256[] memory outgoingAssetAmounts_
        )
    {
        (
            address[] memory expectedIncomingAssets,
            uint256[] memory preCallIncomingAssetBalances,
            uint256[] memory minIncomingAssetAmounts,
            SpendAssetsHandleType spendAssetsHandleType,
            address[] memory spendAssets,
            uint256[] memory maxSpendAssetAmounts,
            uint256[] memory preCallSpendAssetBalances
        ) = __preProcessCoI(vaultProxy, _callArgs);

        __executeCoI(
            vaultProxy,
            _callArgs,
            abi.encode(
                spendAssetsHandleType,
                spendAssets,
                maxSpendAssetAmounts,
                expectedIncomingAssets
            )
        );

        (
            incomingAssets_,
            incomingAssetAmounts_,
            outgoingAssets_,
            outgoingAssetAmounts_
        ) = __postProcessCoI(
            vaultProxy,
            expectedIncomingAssets,
            preCallIncomingAssetBalances,
            minIncomingAssetAmounts,
            spendAssetsHandleType,
            spendAssets,
            maxSpendAssetAmounts,
            preCallSpendAssetBalances
        );

        return (incomingAssets_, incomingAssetAmounts_, outgoingAssets_, outgoingAssetAmounts_);
    }

    /// @dev Helper to decode CoI args
    function __decodeCallOnIntegrationArgs(bytes memory _callArgs)
        private
        pure
        returns (
            address adapter_,
            bytes4 selector_,
            bytes memory integrationData_
        )
    {
        return abi.decode(_callArgs, (address, bytes4, bytes));
    }

    /// @dev Helper to emit the CallOnIntegrationExecuted event.
    /// Avoids stack-too-deep error.
    function __emitCoIEvent(
        address _vaultProxy,
        address _caller,
        address _adapter,
        bytes4 _selector,
        bytes memory _integrationData,
        address[] memory _incomingAssets,
        uint256[] memory _incomingAssetAmounts,
        address[] memory _outgoingAssets,
        uint256[] memory _outgoingAssetAmounts
    ) private {
        emit CallOnIntegrationExecutedForFund(
            msg.sender,
            _vaultProxy,
            _caller,
            _adapter,
            _selector,
            _integrationData,
            _incomingAssets,
            _incomingAssetAmounts,
            _outgoingAssets,
            _outgoingAssetAmounts
        );
    }

    /// @dev Helper to execute a call to an integration
    /// @dev Avoids stack-too-deep error
    function __executeCoI(
        address _vaultProxy,
        bytes memory _callArgs,
        bytes memory _encodedAssetTransferArgs
    ) private {
        (
            address adapter,
            bytes4 selector,
            bytes memory integrationData
        ) = __decodeCallOnIntegrationArgs(_callArgs);

        (bool success, bytes memory returnData) = adapter.call(
            abi.encodeWithSelector(
                selector,
                _vaultProxy,
                integrationData,
                _encodedAssetTransferArgs
            )
        );
        require(success, string(returnData));
    }

    /// @dev Helper to get the vault's balance of a particular asset
    function __getVaultAssetBalance(address _vaultProxy, address _asset)
        private
        view
        returns (uint256)
    {
        return ERC20(_asset).balanceOf(_vaultProxy);
    }

    /// @dev Helper to check if an asset is supported
    function __isSupportedAsset(address _asset) private view returns (bool isSupported_) {
        return
            IPrimitivePriceFeed(PRIMITIVE_PRICE_FEED).isSupportedAsset(_asset) ||
            IDerivativePriceFeed(DERIVATIVE_PRICE_FEED).isSupportedAsset(_asset);
    }

    /// @dev Helper for the actions to take on external contracts prior to executing CoI
    function __preCoIHook(address _adapter, bytes4 _selector) private {
        IPolicyManager(POLICY_MANAGER).validatePolicies(
            msg.sender,
            IPolicyManager.PolicyHook.PreCallOnIntegration,
            abi.encode(_adapter, _selector)
        );
    }

    /// @dev Helper for the internal actions to take prior to executing CoI
    function __preProcessCoI(address _vaultProxy, bytes memory _callArgs)
        private
        returns (
            address[] memory expectedIncomingAssets_,
            uint256[] memory preCallIncomingAssetBalances_,
            uint256[] memory minIncomingAssetAmounts_,
            SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory maxSpendAssetAmounts_,
            uint256[] memory preCallSpendAssetBalances_
        )
    {
        (
            address adapter,
            bytes4 selector,
            bytes memory integrationData
        ) = __decodeCallOnIntegrationArgs(_callArgs);

        require(adapterIsRegistered(adapter), "callOnIntegration: Adapter is not registered");

        // Note that expected incoming and spend assets are allowed to overlap
        // (e.g., a fee for the incomingAsset charged in a spend asset)
        (
            spendAssetsHandleType_,
            spendAssets_,
            maxSpendAssetAmounts_,
            expectedIncomingAssets_,
            minIncomingAssetAmounts_
        ) = IIntegrationAdapter(adapter).parseAssetsForMethod(selector, integrationData);
        require(
            spendAssets_.length == maxSpendAssetAmounts_.length,
            "__preProcessCoI: Spend assets arrays unequal"
        );
        require(
            expectedIncomingAssets_.length == minIncomingAssetAmounts_.length,
            "__preProcessCoI: Incoming assets arrays unequal"
        );
        require(spendAssets_.isUniqueSet(), "__preProcessCoI: Duplicate spend asset");
        require(
            expectedIncomingAssets_.isUniqueSet(),
            "__preProcessCoI: Duplicate incoming asset"
        );

        IVault vaultProxyContract = IVault(_vaultProxy);

        preCallIncomingAssetBalances_ = new uint256[](expectedIncomingAssets_.length);
        for (uint256 i = 0; i < expectedIncomingAssets_.length; i++) {
            require(
                expectedIncomingAssets_[i] != address(0),
                "__preProcessCoI: Empty incoming asset address"
            );
            require(
                minIncomingAssetAmounts_[i] > 0,
                "__preProcessCoI: minIncomingAssetAmount must be >0"
            );
            require(
                __isSupportedAsset(expectedIncomingAssets_[i]),
                "__preProcessCoI: Non-receivable incoming asset"
            );

            // Get pre-call balance of each incoming asset.
            // If the asset is not tracked by the fund, allow the balance to default to 0.
            if (vaultProxyContract.isTrackedAsset(expectedIncomingAssets_[i])) {
                // We do not require incoming asset finality, but we attempt to finalize so that
                // the final incoming asset amount is more accurate. There is no need to finalize
                // post-tx.
                preCallIncomingAssetBalances_[i] = __finalizeIfSynthAndGetAssetBalance(
                    _vaultProxy,
                    expectedIncomingAssets_[i],
                    false
                );
            }
        }

        // Get pre-call balances of spend assets and grant approvals to adapter
        preCallSpendAssetBalances_ = new uint256[](spendAssets_.length);
        for (uint256 i = 0; i < spendAssets_.length; i++) {
            require(spendAssets_[i] != address(0), "__preProcessCoI: Empty spend asset");
            require(maxSpendAssetAmounts_[i] > 0, "__preProcessCoI: Empty max spend asset amount");
            // A spend asset must either be a tracked asset of the fund or a supported asset,
            // in order to prevent seeding the fund with a malicious token and performing arbitrary
            // actions within an adapter.
            require(
                vaultProxyContract.isTrackedAsset(spendAssets_[i]) ||
                    __isSupportedAsset(spendAssets_[i]),
                "__preProcessCoI: Non-spendable spend asset"
            );

            // If spend asset is also an incoming asset, no need to record its balance
            if (!expectedIncomingAssets_.contains(spendAssets_[i])) {
                // By requiring spend asset finality before CoI, we will know whether or
                // not the asset balance was entirely spent during the call. There is no need
                // to finalize post-tx.
                preCallSpendAssetBalances_[i] = __finalizeIfSynthAndGetAssetBalance(
                    _vaultProxy,
                    spendAssets_[i],
                    true
                );
            }

            // Grant spend assets access to the adapter.
            // Note that spendAssets_ is already asserted to a unique set.
            if (spendAssetsHandleType_ == SpendAssetsHandleType.Approve) {
                // Use exact approve amount rather than increasing allowances,
                // because all adapters finish their actions atomically.
                __approveAssetSpender(
                    msg.sender,
                    spendAssets_[i],
                    adapter,
                    maxSpendAssetAmounts_[i]
                );
            } else if (spendAssetsHandleType_ == SpendAssetsHandleType.Transfer) {
                __withdrawAssetTo(msg.sender, spendAssets_[i], adapter, maxSpendAssetAmounts_[i]);
            } else if (spendAssetsHandleType_ == SpendAssetsHandleType.Remove) {
                __removeTrackedAsset(msg.sender, spendAssets_[i]);
            }
        }
    }

    /// @dev Helper for the actions to take on external contracts after executing CoI
    function __postCoIHook(
        address _adapter,
        bytes4 _selector,
        address[] memory _incomingAssets,
        uint256[] memory _incomingAssetAmounts,
        address[] memory _outgoingAssets,
        uint256[] memory _outgoingAssetAmounts
    ) private {
        IPolicyManager(POLICY_MANAGER).validatePolicies(
            msg.sender,
            IPolicyManager.PolicyHook.PostCallOnIntegration,
            abi.encode(
                _adapter,
                _selector,
                _incomingAssets,
                _incomingAssetAmounts,
                _outgoingAssets,
                _outgoingAssetAmounts
            )
        );
    }

    /// @dev Helper to reconcile and format incoming and outgoing assets after executing CoI
    function __postProcessCoI(
        address _vaultProxy,
        address[] memory _expectedIncomingAssets,
        uint256[] memory _preCallIncomingAssetBalances,
        uint256[] memory _minIncomingAssetAmounts,
        SpendAssetsHandleType _spendAssetsHandleType,
        address[] memory _spendAssets,
        uint256[] memory _maxSpendAssetAmounts,
        uint256[] memory _preCallSpendAssetBalances
    )
        private
        returns (
            address[] memory incomingAssets_,
            uint256[] memory incomingAssetAmounts_,
            address[] memory outgoingAssets_,
            uint256[] memory outgoingAssetAmounts_
        )
    {
        address[] memory increasedSpendAssets;
        uint256[] memory increasedSpendAssetAmounts;
        (
            outgoingAssets_,
            outgoingAssetAmounts_,
            increasedSpendAssets,
            increasedSpendAssetAmounts
        ) = __reconcileCoISpendAssets(
            _vaultProxy,
            _spendAssetsHandleType,
            _spendAssets,
            _maxSpendAssetAmounts,
            _preCallSpendAssetBalances
        );

        (incomingAssets_, incomingAssetAmounts_) = __reconcileCoIIncomingAssets(
            _vaultProxy,
            _expectedIncomingAssets,
            _preCallIncomingAssetBalances,
            _minIncomingAssetAmounts,
            increasedSpendAssets,
            increasedSpendAssetAmounts
        );

        return (incomingAssets_, incomingAssetAmounts_, outgoingAssets_, outgoingAssetAmounts_);
    }

    /// @dev Helper to process incoming asset balance changes.
    /// See __reconcileCoISpendAssets() for explanation on "increasedSpendAssets".
    function __reconcileCoIIncomingAssets(
        address _vaultProxy,
        address[] memory _expectedIncomingAssets,
        uint256[] memory _preCallIncomingAssetBalances,
        uint256[] memory _minIncomingAssetAmounts,
        address[] memory _increasedSpendAssets,
        uint256[] memory _increasedSpendAssetAmounts
    ) private returns (address[] memory incomingAssets_, uint256[] memory incomingAssetAmounts_) {
        // Incoming assets = expected incoming assets + spend assets with increased balances
        uint256 incomingAssetsCount = _expectedIncomingAssets.length.add(
            _increasedSpendAssets.length
        );

        // Calculate and validate incoming asset amounts
        incomingAssets_ = new address[](incomingAssetsCount);
        incomingAssetAmounts_ = new uint256[](incomingAssetsCount);
        for (uint256 i = 0; i < _expectedIncomingAssets.length; i++) {
            uint256 balanceDiff = __getVaultAssetBalance(_vaultProxy, _expectedIncomingAssets[i])
                .sub(_preCallIncomingAssetBalances[i]);
            require(
                balanceDiff >= _minIncomingAssetAmounts[i],
                "__reconcileCoIAssets: Received incoming asset less than expected"
            );

            // Even if the asset's previous balance was >0, it might not have been tracked
            __addTrackedAsset(msg.sender, _expectedIncomingAssets[i]);

            incomingAssets_[i] = _expectedIncomingAssets[i];
            incomingAssetAmounts_[i] = balanceDiff;
        }

        // Append increaseSpendAssets to incomingAsset vars
        if (_increasedSpendAssets.length > 0) {
            uint256 incomingAssetIndex = _expectedIncomingAssets.length;
            for (uint256 i = 0; i < _increasedSpendAssets.length; i++) {
                incomingAssets_[incomingAssetIndex] = _increasedSpendAssets[i];
                incomingAssetAmounts_[incomingAssetIndex] = _increasedSpendAssetAmounts[i];
                incomingAssetIndex++;
            }
        }

        return (incomingAssets_, incomingAssetAmounts_);
    }

    /// @dev Helper to process spend asset balance changes.
    /// "outgoingAssets" are the spend assets with a decrease in balance.
    /// "increasedSpendAssets" are the spend assets with an unexpected increase in balance.
    /// For example, "increasedSpendAssets" can occur if an adapter has a pre-balance of
    /// the spendAsset, which would be transferred to the fund at the end of the tx.
    function __reconcileCoISpendAssets(
        address _vaultProxy,
        SpendAssetsHandleType _spendAssetsHandleType,
        address[] memory _spendAssets,
        uint256[] memory _maxSpendAssetAmounts,
        uint256[] memory _preCallSpendAssetBalances
    )
        private
        returns (
            address[] memory outgoingAssets_,
            uint256[] memory outgoingAssetAmounts_,
            address[] memory increasedSpendAssets_,
            uint256[] memory increasedSpendAssetAmounts_
        )
    {
        // Determine spend asset balance changes
        uint256[] memory postCallSpendAssetBalances = new uint256[](_spendAssets.length);
        uint256 outgoingAssetsCount;
        uint256 increasedSpendAssetsCount;
        for (uint256 i = 0; i < _spendAssets.length; i++) {
            // If spend asset's initial balance is 0, then it is an incoming asset
            if (_preCallSpendAssetBalances[i] == 0) {
                continue;
            }

            // Handle SpendAssetsHandleType.Remove separately
            if (_spendAssetsHandleType == SpendAssetsHandleType.Remove) {
                outgoingAssetsCount++;
                continue;
            }

            // Determine if the asset is outgoing or incoming, and store the post-balance for later use
            postCallSpendAssetBalances[i] = __getVaultAssetBalance(_vaultProxy, _spendAssets[i]);
            // If the pre- and post- balances are equal, then the asset is neither incoming nor outgoing
            if (postCallSpendAssetBalances[i] < _preCallSpendAssetBalances[i]) {
                outgoingAssetsCount++;
            } else if (postCallSpendAssetBalances[i] > _preCallSpendAssetBalances[i]) {
                increasedSpendAssetsCount++;
            }
        }

        // Format outgoingAssets and increasedSpendAssets (spend assets with unexpected increase in balance)
        outgoingAssets_ = new address[](outgoingAssetsCount);
        outgoingAssetAmounts_ = new uint256[](outgoingAssetsCount);
        increasedSpendAssets_ = new address[](increasedSpendAssetsCount);
        increasedSpendAssetAmounts_ = new uint256[](increasedSpendAssetsCount);
        uint256 outgoingAssetsIndex;
        uint256 increasedSpendAssetsIndex;
        for (uint256 i = 0; i < _spendAssets.length; i++) {
            // If spend asset's initial balance is 0, then it is an incoming asset.
            if (_preCallSpendAssetBalances[i] == 0) {
                continue;
            }

            // Handle SpendAssetsHandleType.Remove separately.
            // No need to validate the max spend asset amount.
            if (_spendAssetsHandleType == SpendAssetsHandleType.Remove) {
                outgoingAssets_[outgoingAssetsIndex] = _spendAssets[i];
                outgoingAssetAmounts_[outgoingAssetsIndex] = _preCallSpendAssetBalances[i];
                outgoingAssetsIndex++;
                continue;
            }

            // If the pre- and post- balances are equal, then the asset is neither incoming nor outgoing
            if (postCallSpendAssetBalances[i] < _preCallSpendAssetBalances[i]) {
                if (postCallSpendAssetBalances[i] == 0) {
                    __removeTrackedAsset(msg.sender, _spendAssets[i]);
                    outgoingAssetAmounts_[outgoingAssetsIndex] = _preCallSpendAssetBalances[i];
                } else {
                    outgoingAssetAmounts_[outgoingAssetsIndex] = _preCallSpendAssetBalances[i].sub(
                        postCallSpendAssetBalances[i]
                    );
                }
                require(
                    outgoingAssetAmounts_[outgoingAssetsIndex] <= _maxSpendAssetAmounts[i],
                    "__reconcileCoISpendAssets: Spent amount greater than expected"
                );

                outgoingAssets_[outgoingAssetsIndex] = _spendAssets[i];
                outgoingAssetsIndex++;
            } else if (postCallSpendAssetBalances[i] > _preCallSpendAssetBalances[i]) {
                increasedSpendAssetAmounts_[increasedSpendAssetsIndex] = postCallSpendAssetBalances[i]
                    .sub(_preCallSpendAssetBalances[i]);
                increasedSpendAssets_[increasedSpendAssetsIndex] = _spendAssets[i];
                increasedSpendAssetsIndex++;
            }
        }

        return (
            outgoingAssets_,
            outgoingAssetAmounts_,
            increasedSpendAssets_,
            increasedSpendAssetAmounts_
        );
    }

    ///////////////////////////
    // INTEGRATIONS REGISTRY //
    ///////////////////////////

    /// @notice Remove integration adapters from the list of registered adapters
    /// @param _adapters Addresses of adapters to be deregistered
    function deregisterAdapters(address[] calldata _adapters) external onlyFundDeployerOwner {
        require(_adapters.length > 0, "deregisterAdapters: _adapters cannot be empty");

        for (uint256 i; i < _adapters.length; i++) {
            require(
                adapterIsRegistered(_adapters[i]),
                "deregisterAdapters: Adapter is not registered"
            );

            registeredAdapters.remove(_adapters[i]);

            emit AdapterDeregistered(_adapters[i], IIntegrationAdapter(_adapters[i]).identifier());
        }
    }

    /// @notice Add integration adapters to the list of registered adapters
    /// @param _adapters Addresses of adapters to be registered
    function registerAdapters(address[] calldata _adapters) external onlyFundDeployerOwner {
        require(_adapters.length > 0, "registerAdapters: _adapters cannot be empty");

        for (uint256 i; i < _adapters.length; i++) {
            require(_adapters[i] != address(0), "registerAdapters: Adapter cannot be empty");

            require(
                !adapterIsRegistered(_adapters[i]),
                "registerAdapters: Adapter already registered"
            );

            registeredAdapters.add(_adapters[i]);

            emit AdapterRegistered(_adapters[i], IIntegrationAdapter(_adapters[i]).identifier());
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Checks if an integration adapter is registered
    /// @param _adapter The adapter to check
    /// @return isRegistered_ True if the adapter is registered
    function adapterIsRegistered(address _adapter) public view returns (bool isRegistered_) {
        return registeredAdapters.contains(_adapter);
    }

    /// @notice Gets the `DERIVATIVE_PRICE_FEED` variable
    /// @return derivativePriceFeed_ The `DERIVATIVE_PRICE_FEED` variable value
    function getDerivativePriceFeed() external view returns (address derivativePriceFeed_) {
        return DERIVATIVE_PRICE_FEED;
    }

    /// @notice Gets the `POLICY_MANAGER` variable
    /// @return policyManager_ The `POLICY_MANAGER` variable value
    function getPolicyManager() external view returns (address policyManager_) {
        return POLICY_MANAGER;
    }

    /// @notice Gets the `PRIMITIVE_PRICE_FEED` variable
    /// @return primitivePriceFeed_ The `PRIMITIVE_PRICE_FEED` variable value
    function getPrimitivePriceFeed() external view returns (address primitivePriceFeed_) {
        return PRIMITIVE_PRICE_FEED;
    }

    /// @notice Gets all registered integration adapters
    /// @return registeredAdaptersArray_ A list of all registered integration adapters
    function getRegisteredAdapters()
        external
        view
        returns (address[] memory registeredAdaptersArray_)
    {
        registeredAdaptersArray_ = new address[](registeredAdapters.length());
        for (uint256 i = 0; i < registeredAdaptersArray_.length; i++) {
            registeredAdaptersArray_[i] = registeredAdapters.at(i);
        }

        return registeredAdaptersArray_;
    }
}

File 78 of 138 : SynthetixAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../../infrastructure/price-feeds/derivatives/feeds/SynthetixPriceFeed.sol";
import "../../../../interfaces/ISynthetix.sol";
import "../utils/AdapterBase.sol";

/// @title SynthetixAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with Synthetix
contract SynthetixAdapter is AdapterBase {
    address private immutable ORIGINATOR;
    address private immutable SYNTHETIX;
    address private immutable SYNTHETIX_PRICE_FEED;
    bytes32 private immutable TRACKING_CODE;

    constructor(
        address _integrationManager,
        address _synthetixPriceFeed,
        address _originator,
        address _synthetix,
        bytes32 _trackingCode
    ) public AdapterBase(_integrationManager) {
        ORIGINATOR = _originator;
        SYNTHETIX = _synthetix;
        SYNTHETIX_PRICE_FEED = _synthetixPriceFeed;
        TRACKING_CODE = _trackingCode;
    }

    // EXTERNAL FUNCTIONS

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ An identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "SYNTHETIX";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");

        (
            address incomingAsset,
            uint256 minIncomingAssetAmount,
            address outgoingAsset,
            uint256 outgoingAssetAmount
        ) = __decodeCallArgs(_encodedCallArgs);

        spendAssets_ = new address[](1);
        spendAssets_[0] = outgoingAsset;
        spendAssetAmounts_ = new uint256[](1);
        spendAssetAmounts_[0] = outgoingAssetAmount;

        incomingAssets_ = new address[](1);
        incomingAssets_[0] = incomingAsset;
        minIncomingAssetAmounts_ = new uint256[](1);
        minIncomingAssetAmounts_[0] = minIncomingAssetAmount;

        return (
            IIntegrationManager.SpendAssetsHandleType.None,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @notice Trades assets on Synthetix
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    function takeOrder(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata
    ) external onlyIntegrationManager {
        (
            address incomingAsset,
            ,
            address outgoingAsset,
            uint256 outgoingAssetAmount
        ) = __decodeCallArgs(_encodedCallArgs);

        address[] memory synths = new address[](2);
        synths[0] = outgoingAsset;
        synths[1] = incomingAsset;

        bytes32[] memory currencyKeys = SynthetixPriceFeed(SYNTHETIX_PRICE_FEED)
            .getCurrencyKeysForSynths(synths);

        ISynthetix(SYNTHETIX).exchangeOnBehalfWithTracking(
            _vaultProxy,
            currencyKeys[0],
            outgoingAssetAmount,
            currencyKeys[1],
            ORIGINATOR,
            TRACKING_CODE
        );
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to decode the encoded call arguments
    function __decodeCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (
            address incomingAsset_,
            uint256 minIncomingAssetAmount_,
            address outgoingAsset_,
            uint256 outgoingAssetAmount_
        )
    {
        return abi.decode(_encodedCallArgs, (address, uint256, address, uint256));
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `ORIGINATOR` variable
    /// @return originator_ The `ORIGINATOR` variable value
    function getOriginator() external view returns (address originator_) {
        return ORIGINATOR;
    }

    /// @notice Gets the `SYNTHETIX` variable
    /// @return synthetix_ The `SYNTHETIX` variable value
    function getSynthetix() external view returns (address synthetix_) {
        return SYNTHETIX;
    }

    /// @notice Gets the `SYNTHETIX_PRICE_FEED` variable
    /// @return synthetixPriceFeed_ The `SYNTHETIX_PRICE_FEED` variable value
    function getSynthetixPriceFeed() external view returns (address synthetixPriceFeed_) {
        return SYNTHETIX_PRICE_FEED;
    }

    /// @notice Gets the `TRACKING_CODE` variable
    /// @return trackingCode_ The `TRACKING_CODE` variable value
    function getTrackingCode() external view returns (bytes32 trackingCode_) {
        return TRACKING_CODE;
    }
}

File 79 of 138 : ChainlinkPriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../interfaces/IChainlinkAggregator.sol";
import "../../utils/DispatcherOwnerMixin.sol";
import "./IPrimitivePriceFeed.sol";

/// @title ChainlinkPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice A price feed that uses Chainlink oracles as price sources
contract ChainlinkPriceFeed is IPrimitivePriceFeed, DispatcherOwnerMixin {
    using SafeMath for uint256;

    event EthUsdAggregatorSet(address prevEthUsdAggregator, address nextEthUsdAggregator);

    event PrimitiveAdded(
        address indexed primitive,
        address aggregator,
        RateAsset rateAsset,
        uint256 unit
    );

    event PrimitiveRemoved(address indexed primitive);

    event PrimitiveUpdated(
        address indexed primitive,
        address prevAggregator,
        address nextAggregator
    );

    event StalePrimitiveRemoved(address indexed primitive);

    event StaleRateThresholdSet(uint256 prevStaleRateThreshold, uint256 nextStaleRateThreshold);

    enum RateAsset {ETH, USD}

    struct AggregatorInfo {
        address aggregator;
        RateAsset rateAsset;
    }

    uint256 private constant ETH_UNIT = 10**18;
    address private immutable WETH_TOKEN;

    address private ethUsdAggregator;
    uint256 private staleRateThreshold;
    mapping(address => AggregatorInfo) private primitiveToAggregatorInfo;
    mapping(address => uint256) private primitiveToUnit;

    constructor(
        address _dispatcher,
        address _wethToken,
        address _ethUsdAggregator,
        address[] memory _primitives,
        address[] memory _aggregators,
        RateAsset[] memory _rateAssets
    ) public DispatcherOwnerMixin(_dispatcher) {
        WETH_TOKEN = _wethToken;
        staleRateThreshold = 25 hours; // 24 hour heartbeat + 1hr buffer
        __setEthUsdAggregator(_ethUsdAggregator);
        if (_primitives.length > 0) {
            __addPrimitives(_primitives, _aggregators, _rateAssets);
        }
    }

    // EXTERNAL FUNCTIONS

    /// @notice Calculates the value of a base asset in terms of a quote asset (using a canonical rate)
    /// @param _baseAsset The base asset
    /// @param _baseAssetAmount The base asset amount to convert
    /// @param _quoteAsset The quote asset
    /// @return quoteAssetAmount_ The equivalent quote asset amount
    /// @return isValid_ True if the rates used in calculations are deemed valid
    function calcCanonicalValue(
        address _baseAsset,
        uint256 _baseAssetAmount,
        address _quoteAsset
    ) public view override returns (uint256 quoteAssetAmount_, bool isValid_) {
        // Case where _baseAsset == _quoteAsset is handled by ValueInterpreter

        int256 baseAssetRate = __getLatestRateData(_baseAsset);
        if (baseAssetRate <= 0) {
            return (0, false);
        }

        int256 quoteAssetRate = __getLatestRateData(_quoteAsset);
        if (quoteAssetRate <= 0) {
            return (0, false);
        }

        (quoteAssetAmount_, isValid_) = __calcConversionAmount(
            _baseAsset,
            _baseAssetAmount,
            uint256(baseAssetRate),
            _quoteAsset,
            uint256(quoteAssetRate)
        );

        return (quoteAssetAmount_, isValid_);
    }

    /// @notice Calculates the value of a base asset in terms of a quote asset (using a live rate)
    /// @param _baseAsset The base asset
    /// @param _baseAssetAmount The base asset amount to convert
    /// @param _quoteAsset The quote asset
    /// @return quoteAssetAmount_ The equivalent quote asset amount
    /// @return isValid_ True if the rates used in calculations are deemed valid
    /// @dev Live and canonical values are the same for Chainlink
    function calcLiveValue(
        address _baseAsset,
        uint256 _baseAssetAmount,
        address _quoteAsset
    ) external view override returns (uint256 quoteAssetAmount_, bool isValid_) {
        return calcCanonicalValue(_baseAsset, _baseAssetAmount, _quoteAsset);
    }

    /// @notice Checks whether an asset is a supported primitive of the price feed
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is a supported primitive
    function isSupportedAsset(address _asset) external view override returns (bool isSupported_) {
        return _asset == WETH_TOKEN || primitiveToAggregatorInfo[_asset].aggregator != address(0);
    }

    /// @notice Sets the `ehUsdAggregator` variable value
    /// @param _nextEthUsdAggregator The `ehUsdAggregator` value to set
    function setEthUsdAggregator(address _nextEthUsdAggregator) external onlyDispatcherOwner {
        __setEthUsdAggregator(_nextEthUsdAggregator);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to convert an amount from a _baseAsset to a _quoteAsset
    function __calcConversionAmount(
        address _baseAsset,
        uint256 _baseAssetAmount,
        uint256 _baseAssetRate,
        address _quoteAsset,
        uint256 _quoteAssetRate
    ) private view returns (uint256 quoteAssetAmount_, bool isValid_) {
        RateAsset baseAssetRateAsset = getRateAssetForPrimitive(_baseAsset);
        RateAsset quoteAssetRateAsset = getRateAssetForPrimitive(_quoteAsset);
        uint256 baseAssetUnit = getUnitForPrimitive(_baseAsset);
        uint256 quoteAssetUnit = getUnitForPrimitive(_quoteAsset);

        // If rates are both in ETH or both in USD
        if (baseAssetRateAsset == quoteAssetRateAsset) {
            return (
                __calcConversionAmountSameRateAsset(
                    _baseAssetAmount,
                    baseAssetUnit,
                    _baseAssetRate,
                    quoteAssetUnit,
                    _quoteAssetRate
                ),
                true
            );
        }

        int256 ethPerUsdRate = IChainlinkAggregator(ethUsdAggregator).latestAnswer();
        if (ethPerUsdRate <= 0) {
            return (0, false);
        }

        // If _baseAsset's rate is in ETH and _quoteAsset's rate is in USD
        if (baseAssetRateAsset == RateAsset.ETH) {
            return (
                __calcConversionAmountEthRateAssetToUsdRateAsset(
                    _baseAssetAmount,
                    baseAssetUnit,
                    _baseAssetRate,
                    quoteAssetUnit,
                    _quoteAssetRate,
                    uint256(ethPerUsdRate)
                ),
                true
            );
        }

        // If _baseAsset's rate is in USD and _quoteAsset's rate is in ETH
        return (
            __calcConversionAmountUsdRateAssetToEthRateAsset(
                _baseAssetAmount,
                baseAssetUnit,
                _baseAssetRate,
                quoteAssetUnit,
                _quoteAssetRate,
                uint256(ethPerUsdRate)
            ),
            true
        );
    }

    /// @dev Helper to convert amounts where the base asset has an ETH rate and the quote asset has a USD rate
    function __calcConversionAmountEthRateAssetToUsdRateAsset(
        uint256 _baseAssetAmount,
        uint256 _baseAssetUnit,
        uint256 _baseAssetRate,
        uint256 _quoteAssetUnit,
        uint256 _quoteAssetRate,
        uint256 _ethPerUsdRate
    ) private pure returns (uint256 quoteAssetAmount_) {
        // Only allows two consecutive multiplication operations to avoid potential overflow.
        // Intermediate step needed to resolve stack-too-deep error.
        uint256 intermediateStep = _baseAssetAmount.mul(_baseAssetRate).mul(_ethPerUsdRate).div(
            ETH_UNIT
        );

        return intermediateStep.mul(_quoteAssetUnit).div(_baseAssetUnit).div(_quoteAssetRate);
    }

    /// @dev Helper to convert amounts where base and quote assets both have ETH rates or both have USD rates
    function __calcConversionAmountSameRateAsset(
        uint256 _baseAssetAmount,
        uint256 _baseAssetUnit,
        uint256 _baseAssetRate,
        uint256 _quoteAssetUnit,
        uint256 _quoteAssetRate
    ) private pure returns (uint256 quoteAssetAmount_) {
        // Only allows two consecutive multiplication operations to avoid potential overflow
        return
            _baseAssetAmount.mul(_baseAssetRate).mul(_quoteAssetUnit).div(
                _baseAssetUnit.mul(_quoteAssetRate)
            );
    }

    /// @dev Helper to convert amounts where the base asset has a USD rate and the quote asset has an ETH rate
    function __calcConversionAmountUsdRateAssetToEthRateAsset(
        uint256 _baseAssetAmount,
        uint256 _baseAssetUnit,
        uint256 _baseAssetRate,
        uint256 _quoteAssetUnit,
        uint256 _quoteAssetRate,
        uint256 _ethPerUsdRate
    ) private pure returns (uint256 quoteAssetAmount_) {
        // Only allows two consecutive multiplication operations to avoid potential overflow
        // Intermediate step needed to resolve stack-too-deep error.
        uint256 intermediateStep = _baseAssetAmount.mul(_baseAssetRate).mul(_quoteAssetUnit).div(
            _ethPerUsdRate
        );

        return intermediateStep.mul(ETH_UNIT).div(_baseAssetUnit).div(_quoteAssetRate);
    }

    /// @dev Helper to get the latest rate for a given primitive
    function __getLatestRateData(address _primitive) private view returns (int256 rate_) {
        if (_primitive == WETH_TOKEN) {
            return int256(ETH_UNIT);
        }

        address aggregator = primitiveToAggregatorInfo[_primitive].aggregator;
        require(aggregator != address(0), "__getLatestRateData: Primitive does not exist");

        return IChainlinkAggregator(aggregator).latestAnswer();
    }

    /// @dev Helper to set the `ethUsdAggregator` value
    function __setEthUsdAggregator(address _nextEthUsdAggregator) private {
        address prevEthUsdAggregator = ethUsdAggregator;
        require(
            _nextEthUsdAggregator != prevEthUsdAggregator,
            "__setEthUsdAggregator: Value already set"
        );

        __validateAggregator(_nextEthUsdAggregator);

        ethUsdAggregator = _nextEthUsdAggregator;

        emit EthUsdAggregatorSet(prevEthUsdAggregator, _nextEthUsdAggregator);
    }

    /////////////////////////
    // PRIMITIVES REGISTRY //
    /////////////////////////

    /// @notice Adds a list of primitives with the given aggregator and rateAsset values
    /// @param _primitives The primitives to add
    /// @param _aggregators The ordered aggregators corresponding to the list of _primitives
    /// @param _rateAssets The ordered rate assets corresponding to the list of _primitives
    function addPrimitives(
        address[] calldata _primitives,
        address[] calldata _aggregators,
        RateAsset[] calldata _rateAssets
    ) external onlyDispatcherOwner {
        require(_primitives.length > 0, "addPrimitives: _primitives cannot be empty");

        __addPrimitives(_primitives, _aggregators, _rateAssets);
    }

    /// @notice Removes a list of primitives from the feed
    /// @param _primitives The primitives to remove
    function removePrimitives(address[] calldata _primitives) external onlyDispatcherOwner {
        require(_primitives.length > 0, "removePrimitives: _primitives cannot be empty");

        for (uint256 i; i < _primitives.length; i++) {
            require(
                primitiveToAggregatorInfo[_primitives[i]].aggregator != address(0),
                "removePrimitives: Primitive not yet added"
            );

            delete primitiveToAggregatorInfo[_primitives[i]];
            delete primitiveToUnit[_primitives[i]];

            emit PrimitiveRemoved(_primitives[i]);
        }
    }

    /// @notice Removes stale primitives from the feed
    /// @param _primitives The stale primitives to remove
    /// @dev Callable by anybody
    function removeStalePrimitives(address[] calldata _primitives) external {
        require(_primitives.length > 0, "removeStalePrimitives: _primitives cannot be empty");

        for (uint256 i; i < _primitives.length; i++) {
            address aggregatorAddress = primitiveToAggregatorInfo[_primitives[i]].aggregator;
            require(aggregatorAddress != address(0), "removeStalePrimitives: Invalid primitive");
            require(rateIsStale(aggregatorAddress), "removeStalePrimitives: Rate is not stale");

            delete primitiveToAggregatorInfo[_primitives[i]];
            delete primitiveToUnit[_primitives[i]];

            emit StalePrimitiveRemoved(_primitives[i]);
        }
    }

    /// @notice Sets the `staleRateThreshold` variable
    /// @param _nextStaleRateThreshold The next `staleRateThreshold` value
    function setStaleRateThreshold(uint256 _nextStaleRateThreshold) external onlyDispatcherOwner {
        uint256 prevStaleRateThreshold = staleRateThreshold;
        require(
            _nextStaleRateThreshold != prevStaleRateThreshold,
            "__setStaleRateThreshold: Value already set"
        );

        staleRateThreshold = _nextStaleRateThreshold;

        emit StaleRateThresholdSet(prevStaleRateThreshold, _nextStaleRateThreshold);
    }

    /// @notice Updates the aggregators for given primitives
    /// @param _primitives The primitives to update
    /// @param _aggregators The ordered aggregators corresponding to the list of _primitives
    function updatePrimitives(address[] calldata _primitives, address[] calldata _aggregators)
        external
        onlyDispatcherOwner
    {
        require(_primitives.length > 0, "updatePrimitives: _primitives cannot be empty");
        require(
            _primitives.length == _aggregators.length,
            "updatePrimitives: Unequal _primitives and _aggregators array lengths"
        );

        for (uint256 i; i < _primitives.length; i++) {
            address prevAggregator = primitiveToAggregatorInfo[_primitives[i]].aggregator;
            require(prevAggregator != address(0), "updatePrimitives: Primitive not yet added");
            require(_aggregators[i] != prevAggregator, "updatePrimitives: Value already set");

            __validateAggregator(_aggregators[i]);

            primitiveToAggregatorInfo[_primitives[i]].aggregator = _aggregators[i];

            emit PrimitiveUpdated(_primitives[i], prevAggregator, _aggregators[i]);
        }
    }

    /// @notice Checks whether the current rate is considered stale for the specified aggregator
    /// @param _aggregator The Chainlink aggregator of which to check staleness
    /// @return rateIsStale_ True if the rate is considered stale
    function rateIsStale(address _aggregator) public view returns (bool rateIsStale_) {
        return
            IChainlinkAggregator(_aggregator).latestTimestamp() <
            block.timestamp.sub(staleRateThreshold);
    }

    /// @dev Helper to add primitives to the feed
    function __addPrimitives(
        address[] memory _primitives,
        address[] memory _aggregators,
        RateAsset[] memory _rateAssets
    ) private {
        require(
            _primitives.length == _aggregators.length,
            "__addPrimitives: Unequal _primitives and _aggregators array lengths"
        );
        require(
            _primitives.length == _rateAssets.length,
            "__addPrimitives: Unequal _primitives and _rateAssets array lengths"
        );

        for (uint256 i = 0; i < _primitives.length; i++) {
            require(
                primitiveToAggregatorInfo[_primitives[i]].aggregator == address(0),
                "__addPrimitives: Value already set"
            );

            __validateAggregator(_aggregators[i]);

            primitiveToAggregatorInfo[_primitives[i]] = AggregatorInfo({
                aggregator: _aggregators[i],
                rateAsset: _rateAssets[i]
            });

            // Store the amount that makes up 1 unit given the asset's decimals
            uint256 unit = 10**uint256(ERC20(_primitives[i]).decimals());
            primitiveToUnit[_primitives[i]] = unit;

            emit PrimitiveAdded(_primitives[i], _aggregators[i], _rateAssets[i], unit);
        }
    }

    /// @dev Helper to validate an aggregator by checking its return values for the expected interface
    function __validateAggregator(address _aggregator) private view {
        require(_aggregator != address(0), "__validateAggregator: Empty _aggregator");

        require(
            IChainlinkAggregator(_aggregator).latestAnswer() > 0,
            "__validateAggregator: No rate detected"
        );
        require(!rateIsStale(_aggregator), "__validateAggregator: Stale rate detected");
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the aggregatorInfo variable value for a primitive
    /// @param _primitive The primitive asset for which to get the aggregatorInfo value
    /// @return aggregatorInfo_ The aggregatorInfo value
    function getAggregatorInfoForPrimitive(address _primitive)
        external
        view
        returns (AggregatorInfo memory aggregatorInfo_)
    {
        return primitiveToAggregatorInfo[_primitive];
    }

    /// @notice Gets the `ethUsdAggregator` variable value
    /// @return ethUsdAggregator_ The `ethUsdAggregator` variable value
    function getEthUsdAggregator() external view returns (address ethUsdAggregator_) {
        return ethUsdAggregator;
    }

    /// @notice Gets the `staleRateThreshold` variable value
    /// @return staleRateThreshold_ The `staleRateThreshold` variable value
    function getStaleRateThreshold() external view returns (uint256 staleRateThreshold_) {
        return staleRateThreshold;
    }

    /// @notice Gets the `WETH_TOKEN` variable value
    /// @return wethToken_ The `WETH_TOKEN` variable value
    function getWethToken() external view returns (address wethToken_) {
        return WETH_TOKEN;
    }

    /// @notice Gets the rateAsset variable value for a primitive
    /// @return rateAsset_ The rateAsset variable value
    /// @dev This isn't strictly necessary as WETH_TOKEN will be undefined and thus
    /// the RateAsset will be the 0-position of the enum (i.e. ETH), but it makes the
    /// behavior more explicit
    function getRateAssetForPrimitive(address _primitive)
        public
        view
        returns (RateAsset rateAsset_)
    {
        if (_primitive == WETH_TOKEN) {
            return RateAsset.ETH;
        }

        return primitiveToAggregatorInfo[_primitive].rateAsset;
    }

    /// @notice Gets the unit variable value for a primitive
    /// @return unit_ The unit variable value
    function getUnitForPrimitive(address _primitive) public view returns (uint256 unit_) {
        if (_primitive == WETH_TOKEN) {
            return ETH_UNIT;
        }

        return primitiveToUnit[_primitive];
    }
}

File 80 of 138 : CentralizedRateProvider.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../release/infrastructure/value-interpreter/IValueInterpreter.sol";
import "../../release/infrastructure/price-feeds/derivatives/IAggregatedDerivativePriceFeed.sol";
import "../../release/infrastructure/price-feeds/primitives/IPrimitivePriceFeed.sol";

/// @dev This contract acts as a centralized rate provider for mocks.
/// Suited for a dev environment, it doesn't take into account gas costs.
contract CentralizedRateProvider is Ownable {
    using SafeMath for uint256;

    address private immutable WETH;
    uint256 private maxDeviationPerSender;

    // Addresses are not immutable to facilitate lazy load (they're are not accessible at the mock env).
    address private valueInterpreter;
    address private aggregateDerivativePriceFeed;
    address private primitivePriceFeed;

    constructor(address _weth, uint256 _maxDeviationPerSender) public {
        maxDeviationPerSender = _maxDeviationPerSender;
        WETH = _weth;
    }

    /// @dev Calculates the value of a _baseAsset relative to a _quoteAsset.
    /// Label to ValueInterprete's calcLiveAssetValue
    function calcLiveAssetValue(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset
    ) public returns (uint256 value_) {
        uint256 baseDecimalsRate = 10**uint256(ERC20(_baseAsset).decimals());
        uint256 quoteDecimalsRate = 10**uint256(ERC20(_quoteAsset).decimals());

        // 1. Check if quote asset is a primitive. If it is, use ValueInterpreter normally.
        if (IPrimitivePriceFeed(primitivePriceFeed).isSupportedAsset(_quoteAsset)) {
            (value_, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
                _baseAsset,
                _amount,
                _quoteAsset
            );
            return value_;
        }

        // 2. Otherwise, check if base asset is a primitive, and use inverse rate from Value Interpreter.
        if (IPrimitivePriceFeed(primitivePriceFeed).isSupportedAsset(_baseAsset)) {
            (uint256 inverseRate, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
                _quoteAsset,
                10**uint256(ERC20(_quoteAsset).decimals()),
                _baseAsset
            );

            uint256 rate = uint256(baseDecimalsRate).mul(quoteDecimalsRate).div(inverseRate);

            value_ = _amount.mul(rate).div(baseDecimalsRate);
            return value_;
        }

        // 3. If both assets are derivatives, calculate the rate against ETH.
        (uint256 baseToWeth, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
            _baseAsset,
            baseDecimalsRate,
            WETH
        );

        (uint256 quoteToWeth, ) = IValueInterpreter(valueInterpreter).calcLiveAssetValue(
            _quoteAsset,
            quoteDecimalsRate,
            WETH
        );

        value_ = _amount.mul(baseToWeth).mul(quoteDecimalsRate).div(quoteToWeth).div(
            baseDecimalsRate
        );
        return value_;
    }

    /// @dev Calculates a randomized live value of an asset
    /// Aggregation of two randomization seeds: msg.sender, and by block.number.
    function calcLiveAssetValueRandomized(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset,
        uint256 _maxDeviationPerBlock
    ) external returns (uint256 value_) {
        uint256 liveAssetValue = calcLiveAssetValue(_baseAsset, _amount, _quoteAsset);

        // Range [liveAssetValue * (1 - _blockNumberDeviation), liveAssetValue * (1 + _blockNumberDeviation)]
        uint256 senderRandomizedValue_ = __calcValueRandomizedByAddress(
            liveAssetValue,
            msg.sender,
            maxDeviationPerSender
        );

        // Range [liveAssetValue * (1 - _maxDeviationPerBlock - maxDeviationPerSender), liveAssetValue * (1 + _maxDeviationPerBlock + maxDeviationPerSender)]
        value_ = __calcValueRandomizedByUint(
            senderRandomizedValue_,
            block.number,
            _maxDeviationPerBlock
        );

        return value_;
    }

    /// @dev Calculates the live value of an asset including a grade of pseudo randomization, using msg.sender as the source of randomness
    function calcLiveAssetValueRandomizedByBlockNumber(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset,
        uint256 _maxDeviationPerBlock
    ) external returns (uint256 value_) {
        uint256 liveAssetValue = calcLiveAssetValue(_baseAsset, _amount, _quoteAsset);

        value_ = __calcValueRandomizedByUint(liveAssetValue, block.number, _maxDeviationPerBlock);

        return value_;
    }

    /// @dev Calculates the live value of an asset including a grade of pseudo-randomization, using `block.number` as the source of randomness
    function calcLiveAssetValueRandomizedBySender(
        address _baseAsset,
        uint256 _amount,
        address _quoteAsset
    ) external returns (uint256 value_) {
        uint256 liveAssetValue = calcLiveAssetValue(_baseAsset, _amount, _quoteAsset);

        value_ = __calcValueRandomizedByAddress(liveAssetValue, msg.sender, maxDeviationPerSender);

        return value_;
    }

    function setMaxDeviationPerSender(uint256 _maxDeviationPerSender) external onlyOwner {
        maxDeviationPerSender = _maxDeviationPerSender;
    }

    /// @dev Connector from release environment, inject price variables into the provider.
    function setReleasePriceAddresses(
        address _valueInterpreter,
        address _aggregateDerivativePriceFeed,
        address _primitivePriceFeed
    ) external onlyOwner {
        valueInterpreter = _valueInterpreter;
        aggregateDerivativePriceFeed = _aggregateDerivativePriceFeed;
        primitivePriceFeed = _primitivePriceFeed;
    }

    // PRIVATE FUNCTIONS

    /// @dev Calculates a a pseudo-randomized value as a seed an address
    function __calcValueRandomizedByAddress(
        uint256 _meanValue,
        address _seed,
        uint256 _maxDeviation
    ) private pure returns (uint256 value_) {
        // Value between [0, 100]
        uint256 senderRandomFactor = uint256(uint8(_seed))
            .mul(100)
            .div(256)
            .mul(_maxDeviation)
            .div(100);

        value_ = __calcDeviatedValue(_meanValue, senderRandomFactor, _maxDeviation);

        return value_;
    }

    /// @dev Calculates a a pseudo-randomized value as a seed an uint256
    function __calcValueRandomizedByUint(
        uint256 _meanValue,
        uint256 _seed,
        uint256 _maxDeviation
    ) private pure returns (uint256 value_) {
        // Depending on the _seed number, it will be one of {20, 40, 60, 80, 100}
        uint256 randomFactor = (_seed.mod(2).mul(20))
            .add((_seed.mod(3).mul(40)))
            .mul(_maxDeviation)
            .div(100);

        value_ = __calcDeviatedValue(_meanValue, randomFactor, _maxDeviation);

        return value_;
    }

    /// @dev Given a mean value and a max deviation, returns a value in the spectrum between 0 (_meanValue - maxDeviation) and 100 (_mean + maxDeviation)
    /// TODO: Refactor to use 18 decimal precision
    function __calcDeviatedValue(
        uint256 _meanValue,
        uint256 _offset,
        uint256 _maxDeviation
    ) private pure returns (uint256 value_) {
        return
            _meanValue.add((_meanValue.mul((uint256(2)).mul(_offset)).div(uint256(100)))).sub(
                _meanValue.mul(_maxDeviation).div(uint256(100))
            );
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    function getMaxDeviationPerSender() public view returns (uint256 maxDeviationPerSender_) {
        return maxDeviationPerSender;
    }

    function getValueInterpreter() public view returns (address valueInterpreter_) {
        return valueInterpreter;
    }
}

File 81 of 138 : Ownable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../GSN/Context.sol";
/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor () internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner != address(0), "Ownable: new owner is the zero address");
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

File 82 of 138 : MockUniswapV2Integratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../prices/CentralizedRateProvider.sol";
import "./utils/SimpleMockIntegrateeBase.sol";

/// @dev Mocks the integration with `UniswapV2Router02` <https://uniswap.org/docs/v2/smart-contracts/router02/>
/// Additionally mocks the integration with `UniswapV2Factory` <https://uniswap.org/docs/v2/smart-contracts/factory/>
contract MockUniswapV2Integratee is SwapperBase, Ownable {
    using SafeMath for uint256;
    mapping(address => mapping(address => address)) private assetToAssetToPair;

    address private immutable CENTRALIZED_RATE_PROVIDER;
    uint256 private constant PRECISION = 18;

    // Set in %, defines the MAX deviation per block from the mean rate
    uint256 private blockNumberDeviation;

    constructor(
        address[] memory _listOfToken0,
        address[] memory _listOfToken1,
        address[] memory _listOfPair,
        address _centralizedRateProvider,
        uint256 _blockNumberDeviation
    ) public {
        addPair(_listOfToken0, _listOfToken1, _listOfPair);
        CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
        blockNumberDeviation = _blockNumberDeviation;
    }

    /// @dev Adds the maximum possible value from {_amountADesired _amountBDesired}
    /// Makes use of the value interpreter to perform those calculations
    function addLiquidity(
        address _tokenA,
        address _tokenB,
        uint256 _amountADesired,
        uint256 _amountBDesired,
        uint256,
        uint256,
        address,
        uint256
    )
        external
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        __addLiquidity(_tokenA, _tokenB, _amountADesired, _amountBDesired);
    }

    /// @dev Removes the specified amount of liquidity
    /// Returns 50% of the incoming liquidity value on each token.
    function removeLiquidity(
        address _tokenA,
        address _tokenB,
        uint256 _liquidity,
        uint256,
        uint256,
        address,
        uint256
    ) public returns (uint256, uint256) {
        __removeLiquidity(_tokenA, _tokenB, _liquidity);
    }

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256,
        address[] calldata path,
        address,
        uint256
    ) external returns (uint256[] memory) {
        uint256 amountOut = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValueRandomized(path[0], amountIn, path[1], blockNumberDeviation);

        __swapAssets(msg.sender, path[0], amountIn, path[path.length - 1], amountOut);
    }

    /// @dev We don't calculate any intermediate values here because they aren't actually used
    /// Returns the randomized by sender value of the edge path assets
    function getAmountsOut(uint256 _amountIn, address[] calldata _path)
        external
        returns (uint256[] memory amounts_)
    {
        require(_path.length >= 2, "getAmountsOut: path must be >= 2");

        address assetIn = _path[0];
        address assetOut = _path[_path.length - 1];

        uint256 amountOut = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValueRandomizedBySender(assetIn, _amountIn, assetOut);

        amounts_ = new uint256[](_path.length);
        amounts_[0] = _amountIn;
        amounts_[_path.length - 1] = amountOut;

        return amounts_;
    }

    function addPair(
        address[] memory _listOfToken0,
        address[] memory _listOfToken1,
        address[] memory _listOfPair
    ) public onlyOwner {
        require(
            _listOfPair.length == _listOfToken0.length,
            "constructor: _listOfPair and _listOfToken0 have an unequal length"
        );
        require(
            _listOfPair.length == _listOfToken1.length,
            "constructor: _listOfPair and _listOfToken1 have an unequal length"
        );
        for (uint256 i; i < _listOfPair.length; i++) {
            address token0 = _listOfToken0[i];
            address token1 = _listOfToken1[i];
            address pair = _listOfPair[i];
            assetToAssetToPair[token0][token1] = pair;
            assetToAssetToPair[token1][token0] = pair;
        }
    }

    function setBlockNumberDeviation(uint256 _deviationPct) external onlyOwner {
        blockNumberDeviation = _deviationPct;
    }

    // PRIVATE FUNCTIONS

    /// Avoids stack-too-deep error.
    function __addLiquidity(
        address _tokenA,
        address _tokenB,
        uint256 _amountADesired,
        uint256 _amountBDesired
    ) private {
        address pair = getPair(_tokenA, _tokenB);

        uint256 amountA;
        uint256 amountB;

        uint256 amountBFromA = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValue(_tokenA, _amountADesired, _tokenB);
        uint256 amountAFromB = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValue(_tokenB, _amountBDesired, _tokenA);

        if (amountBFromA >= _amountBDesired) {
            amountA = amountAFromB;
            amountB = _amountBDesired;
        } else {
            amountA = _amountADesired;
            amountB = amountBFromA;
        }

        uint256 tokenPerLPToken = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValue(pair, 10**uint256(PRECISION), _tokenA);

        // Calculate the inverse rate to know the amount of LPToken to return from a unit of token
        uint256 inverseRate = uint256(10**PRECISION).mul(10**PRECISION).div(tokenPerLPToken);

        // Total liquidity can be calculated as 2x liquidity from amount A
        uint256 totalLiquidity = uint256(2).mul(
            amountA.mul(inverseRate).div(uint256(10**PRECISION))
        );

        require(
            ERC20(pair).balanceOf(address(this)) >= totalLiquidity,
            "__addLiquidity: Integratee doesn't have enough pair balance to cover the expected amount"
        );

        address[] memory assetsToIntegratee = new address[](2);
        uint256[] memory assetsToIntegrateeAmounts = new uint256[](2);
        address[] memory assetsFromIntegratee = new address[](1);
        uint256[] memory assetsFromIntegrateeAmounts = new uint256[](1);

        assetsToIntegratee[0] = _tokenA;
        assetsToIntegrateeAmounts[0] = amountA;
        assetsToIntegratee[1] = _tokenB;
        assetsToIntegrateeAmounts[1] = amountB;
        assetsFromIntegratee[0] = pair;
        assetsFromIntegrateeAmounts[0] = totalLiquidity;

        __swap(
            msg.sender,
            assetsToIntegratee,
            assetsToIntegrateeAmounts,
            assetsFromIntegratee,
            assetsFromIntegrateeAmounts
        );
    }

    /// Avoids stack-too-deep error.
    function __removeLiquidity(
        address _tokenA,
        address _tokenB,
        uint256 _liquidity
    ) private {
        address pair = assetToAssetToPair[_tokenA][_tokenB];
        require(pair != address(0), "__removeLiquidity: this pair doesn't exist");

        uint256 amountA = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValue(pair, _liquidity, _tokenA)
            .div(uint256(2));

        uint256 amountB = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValue(pair, _liquidity, _tokenB)
            .div(uint256(2));

        address[] memory assetsToIntegratee = new address[](1);
        uint256[] memory assetsToIntegrateeAmounts = new uint256[](1);
        address[] memory assetsFromIntegratee = new address[](2);
        uint256[] memory assetsFromIntegrateeAmounts = new uint256[](2);

        assetsToIntegratee[0] = pair;
        assetsToIntegrateeAmounts[0] = _liquidity;
        assetsFromIntegratee[0] = _tokenA;
        assetsFromIntegrateeAmounts[0] = amountA;
        assetsFromIntegratee[1] = _tokenB;
        assetsFromIntegrateeAmounts[1] = amountB;

        require(
            ERC20(_tokenA).balanceOf(address(this)) >= amountA,
            "__removeLiquidity: Integratee doesn't have enough tokenA balance to cover the expected amount"
        );
        require(
            ERC20(_tokenB).balanceOf(address(this)) >= amountA,
            "__removeLiquidity: Integratee doesn't have enough tokenB balance to cover the expected amount"
        );

        __swap(
            msg.sender,
            assetsToIntegratee,
            assetsToIntegrateeAmounts,
            assetsFromIntegratee,
            assetsFromIntegrateeAmounts
        );
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @dev By default set to address(0). It is read by UniswapV2PoolTokenValueCalculator: __calcPoolTokenValue
    function feeTo() external pure returns (address) {
        return address(0);
    }

    function getCentralizedRateProvider() public view returns (address) {
        return CENTRALIZED_RATE_PROVIDER;
    }

    function getBlockNumberDeviation() public view returns (uint256) {
        return blockNumberDeviation;
    }

    function getPrecision() public pure returns (uint256) {
        return PRECISION;
    }

    function getPair(address _token0, address _token1) public view returns (address) {
        return assetToAssetToPair[_token0][_token1];
    }
}

File 83 of 138 : SimpleMockIntegrateeBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./MockIntegrateeBase.sol";

abstract contract SimpleMockIntegrateeBase is MockIntegrateeBase {
    constructor(
        address[] memory _defaultRateAssets,
        address[] memory _specialAssets,
        uint8[] memory _specialAssetDecimals,
        uint256 _ratePrecision
    )
        public
        MockIntegrateeBase(
            _defaultRateAssets,
            _specialAssets,
            _specialAssetDecimals,
            _ratePrecision
        )
    {}

    function __getRateAndSwapAssets(
        address payable _trader,
        address _srcToken,
        uint256 _srcAmount,
        address _destToken
    ) internal returns (uint256 destAmount_) {
        uint256 actualRate = __getRate(_srcToken, _destToken);
        __swapAssets(_trader, _srcToken, _srcAmount, _destToken, actualRate);
        return actualRate;
    }
}

File 84 of 138 : MockIntegrateeBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../utils/NormalizedRateProviderBase.sol";
import "../../utils/SwapperBase.sol";

abstract contract MockIntegrateeBase is NormalizedRateProviderBase, SwapperBase {
    constructor(
        address[] memory _defaultRateAssets,
        address[] memory _specialAssets,
        uint8[] memory _specialAssetDecimals,
        uint256 _ratePrecision
    )
        public
        NormalizedRateProviderBase(
            _defaultRateAssets,
            _specialAssets,
            _specialAssetDecimals,
            _ratePrecision
        )
    {}

    function __getRate(address _baseAsset, address _quoteAsset)
        internal
        view
        override
        returns (uint256)
    {
        // 1. Return constant if base asset is quote asset
        if (_baseAsset == _quoteAsset) {
            return 10**RATE_PRECISION;
        }

        // 2. Check for a direct rate
        uint256 directRate = assetToAssetRate[_baseAsset][_quoteAsset];
        if (directRate > 0) {
            return directRate;
        }

        // 3. Check for inverse direct rate
        uint256 iDirectRate = assetToAssetRate[_quoteAsset][_baseAsset];
        if (iDirectRate > 0) {
            return 10**(RATE_PRECISION.mul(2)).div(iDirectRate);
        }

        // 4. Else return 1
        return 10**RATE_PRECISION;
    }
}

File 85 of 138 : NormalizedRateProviderBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "./RateProviderBase.sol";

abstract contract NormalizedRateProviderBase is RateProviderBase {
    using SafeMath for uint256;

    uint256 public immutable RATE_PRECISION;

    constructor(
        address[] memory _defaultRateAssets,
        address[] memory _specialAssets,
        uint8[] memory _specialAssetDecimals,
        uint256 _ratePrecision
    ) public RateProviderBase(_specialAssets, _specialAssetDecimals) {
        RATE_PRECISION = _ratePrecision;

        for (uint256 i = 0; i < _defaultRateAssets.length; i++) {
            for (uint256 j = i + 1; j < _defaultRateAssets.length; j++) {
                assetToAssetRate[_defaultRateAssets[i]][_defaultRateAssets[j]] =
                    10**_ratePrecision;
                assetToAssetRate[_defaultRateAssets[j]][_defaultRateAssets[i]] =
                    10**_ratePrecision;
            }
        }
    }

    // TODO: move to main contracts' utils for use with prices
    function __calcDenormalizedQuoteAssetAmount(
        uint256 _baseAssetDecimals,
        uint256 _baseAssetAmount,
        uint256 _quoteAssetDecimals,
        uint256 _rate
    ) internal view returns (uint256) {
        return
            _rate.mul(_baseAssetAmount).mul(10**_quoteAssetDecimals).div(
                10**(RATE_PRECISION.add(_baseAssetDecimals))
            );
    }
}

File 86 of 138 : SwapperBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./EthConstantMixin.sol";

abstract contract SwapperBase is EthConstantMixin {
    receive() external payable {}

    function __swapAssets(
        address payable _trader,
        address _srcToken,
        uint256 _srcAmount,
        address _destToken,
        uint256 _actualRate
    ) internal returns (uint256 destAmount_) {
        address[] memory assetsToIntegratee = new address[](1);
        assetsToIntegratee[0] = _srcToken;
        uint256[] memory assetsToIntegrateeAmounts = new uint256[](1);
        assetsToIntegrateeAmounts[0] = _srcAmount;

        address[] memory assetsFromIntegratee = new address[](1);
        assetsFromIntegratee[0] = _destToken;
        uint256[] memory assetsFromIntegrateeAmounts = new uint256[](1);
        assetsFromIntegrateeAmounts[0] = _actualRate;
        __swap(
            _trader,
            assetsToIntegratee,
            assetsToIntegrateeAmounts,
            assetsFromIntegratee,
            assetsFromIntegrateeAmounts
        );

        return assetsFromIntegrateeAmounts[0];
    }

    function __swap(
        address payable _trader,
        address[] memory _assetsToIntegratee,
        uint256[] memory _assetsToIntegrateeAmounts,
        address[] memory _assetsFromIntegratee,
        uint256[] memory _assetsFromIntegrateeAmounts
    ) internal {
        // Take custody of incoming assets
        for (uint256 i = 0; i < _assetsToIntegratee.length; i++) {
            address asset = _assetsToIntegratee[i];
            uint256 amount = _assetsToIntegrateeAmounts[i];
            require(asset != address(0), "__swap: empty value in _assetsToIntegratee");
            require(amount > 0, "__swap: empty value in _assetsToIntegrateeAmounts");
            // Incoming ETH amounts can be ignored
            if (asset == ETH_ADDRESS) {
                continue;
            }
            ERC20(asset).transferFrom(_trader, address(this), amount);
        }

        // Distribute outgoing assets
        for (uint256 i = 0; i < _assetsFromIntegratee.length; i++) {
            address asset = _assetsFromIntegratee[i];
            uint256 amount = _assetsFromIntegrateeAmounts[i];
            require(asset != address(0), "__swap: empty value in _assetsFromIntegratee");
            require(amount > 0, "__swap: empty value in _assetsFromIntegrateeAmounts");
            if (asset == ETH_ADDRESS) {
                _trader.transfer(amount);
            } else {
                ERC20(asset).transfer(_trader, amount);
            }
        }
    }
}

File 87 of 138 : RateProviderBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "./EthConstantMixin.sol";

abstract contract RateProviderBase is EthConstantMixin {
    mapping(address => mapping(address => uint256)) public assetToAssetRate;

    // Handles non-ERC20 compliant assets like ETH and USD
    mapping(address => uint8) public specialAssetToDecimals;

    constructor(address[] memory _specialAssets, uint8[] memory _specialAssetDecimals) public {
        require(
            _specialAssets.length == _specialAssetDecimals.length,
            "constructor: _specialAssets and _specialAssetDecimals are uneven lengths"
        );
        for (uint256 i = 0; i < _specialAssets.length; i++) {
            specialAssetToDecimals[_specialAssets[i]] = _specialAssetDecimals[i];
        }

        specialAssetToDecimals[ETH_ADDRESS] = 18;
    }

    function __getDecimalsForAsset(address _asset) internal view returns (uint256) {
        uint256 decimals = specialAssetToDecimals[_asset];
        if (decimals == 0) {
            decimals = uint256(ERC20(_asset).decimals());
        }

        return decimals;
    }

    function __getRate(address _baseAsset, address _quoteAsset)
        internal
        view
        virtual
        returns (uint256)
    {
        return assetToAssetRate[_baseAsset][_quoteAsset];
    }

    function setRates(
        address[] calldata _baseAssets,
        address[] calldata _quoteAssets,
        uint256[] calldata _rates
    ) external {
        require(
            _baseAssets.length == _quoteAssets.length,
            "setRates: _baseAssets and _quoteAssets are uneven lengths"
        );
        require(
            _baseAssets.length == _rates.length,
            "setRates: _baseAssets and _rates are uneven lengths"
        );
        for (uint256 i = 0; i < _baseAssets.length; i++) {
            assetToAssetRate[_baseAssets[i]][_quoteAssets[i]] = _rates[i];
        }
    }
}

File 88 of 138 : EthConstantMixin.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

abstract contract EthConstantMixin {
    address public constant ETH_ADDRESS = 0xEeeeeEeeeEeEeeEeEeEeeEEEeeeeEeeeeeeeEEeE;
}

File 89 of 138 : MockParaSwapIntegratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../release/interfaces/IParaSwapAugustusSwapper.sol";
import "../prices/CentralizedRateProvider.sol";
import "../utils/SwapperBase.sol";

contract MockParaSwapIntegratee is SwapperBase {
    using SafeMath for uint256;

    address private immutable MOCK_CENTRALIZED_RATE_PROVIDER;

    // Deviation set in % defines the MAX deviation per block from the mean rate
    uint256 private blockNumberDeviation;

    constructor(address _mockCentralizedRateProvider, uint256 _blockNumberDeviation) public {
        MOCK_CENTRALIZED_RATE_PROVIDER = _mockCentralizedRateProvider;
        blockNumberDeviation = _blockNumberDeviation;
    }

    /// @dev Must be `public` to avoid error
    function multiSwap(
        address _fromToken,
        address _toToken,
        uint256 _fromAmount,
        uint256, // toAmount (min received amount)
        uint256, // expectedAmount
        IParaSwapAugustusSwapper.Path[] memory _paths,
        uint256, // mintPrice
        address, // beneficiary
        uint256, // donationPercentage
        string memory // referrer
    ) public payable returns (uint256) {
        return __multiSwap(_fromToken, _toToken, _fromAmount, _paths);
    }

    /// @dev Helper to parse the total amount of network fees (in ETH) for the multiSwap() call
    function __calcTotalNetworkFees(IParaSwapAugustusSwapper.Path[] memory _paths)
        private
        pure
        returns (uint256 totalNetworkFees_)
    {
        for (uint256 i; i < _paths.length; i++) {
            totalNetworkFees_ = totalNetworkFees_.add(_paths[i].totalNetworkFee);
        }

        return totalNetworkFees_;
    }

    /// @dev Helper to avoid the stack-too-deep error
    function __multiSwap(
        address _fromToken,
        address _toToken,
        uint256 _fromAmount,
        IParaSwapAugustusSwapper.Path[] memory _paths
    ) private returns (uint256) {
        address[] memory assetsFromIntegratee = new address[](1);
        assetsFromIntegratee[0] = _toToken;

        uint256[] memory assetsFromIntegrateeAmounts = new uint256[](1);
        assetsFromIntegrateeAmounts[0] = CentralizedRateProvider(MOCK_CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValueRandomized(_fromToken, _fromAmount, _toToken, blockNumberDeviation);

        uint256 totalNetworkFees = __calcTotalNetworkFees(_paths);
        address[] memory assetsToIntegratee;
        uint256[] memory assetsToIntegrateeAmounts;
        if (totalNetworkFees > 0) {
            assetsToIntegratee = new address[](2);
            assetsToIntegratee[1] = ETH_ADDRESS;

            assetsToIntegrateeAmounts = new uint256[](2);
            assetsToIntegrateeAmounts[1] = totalNetworkFees;
        } else {
            assetsToIntegratee = new address[](1);
            assetsToIntegrateeAmounts = new uint256[](1);
        }
        assetsToIntegratee[0] = _fromToken;
        assetsToIntegrateeAmounts[0] = _fromAmount;

        __swap(
            msg.sender,
            assetsToIntegratee,
            assetsToIntegrateeAmounts,
            assetsFromIntegratee,
            assetsFromIntegrateeAmounts
        );

        return assetsFromIntegrateeAmounts[0];
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    function getBlockNumberDeviation() external view returns (uint256 blockNumberDeviation_) {
        return blockNumberDeviation;
    }

    function getCentralizedRateProvider()
        external
        view
        returns (address centralizedRateProvider_)
    {
        return MOCK_CENTRALIZED_RATE_PROVIDER;
    }
}

File 90 of 138 : IParaSwapAugustusSwapper.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

/// @title ParaSwap IAugustusSwapper interface
interface IParaSwapAugustusSwapper {
    struct Route {
        address payable exchange;
        address targetExchange;
        uint256 percent;
        bytes payload;
        uint256 networkFee;
    }

    struct Path {
        address to;
        uint256 totalNetworkFee;
        Route[] routes;
    }

    function multiSwap(
        address,
        address,
        uint256,
        uint256,
        uint256,
        Path[] calldata,
        uint256,
        address payable,
        uint256,
        string calldata
    ) external payable returns (uint256);
}

File 91 of 138 : ParaSwapAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IParaSwapAugustusSwapper.sol";
import "../../../../interfaces/IWETH.sol";
import "../utils/AdapterBase.sol";

/// @title ParaSwapAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with ParaSwap
contract ParaSwapAdapter is AdapterBase {
    using SafeMath for uint256;

    string private constant REFERRER = "enzyme";

    address private immutable EXCHANGE;
    address private immutable TOKEN_TRANSFER_PROXY;
    address private immutable WETH_TOKEN;

    constructor(
        address _integrationManager,
        address _exchange,
        address _tokenTransferProxy,
        address _wethToken
    ) public AdapterBase(_integrationManager) {
        EXCHANGE = _exchange;
        TOKEN_TRANSFER_PROXY = _tokenTransferProxy;
        WETH_TOKEN = _wethToken;
    }

    /// @dev Needed to receive ETH refund from sent network fees
    receive() external payable {}

    // EXTERNAL FUNCTIONS

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ An identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "PARASWAP";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");

        (
            address incomingAsset,
            uint256 minIncomingAssetAmount,
            ,
            address outgoingAsset,
            uint256 outgoingAssetAmount,
            IParaSwapAugustusSwapper.Path[] memory paths
        ) = __decodeCallArgs(_encodedCallArgs);

        // Format incoming assets
        incomingAssets_ = new address[](1);
        incomingAssets_[0] = incomingAsset;
        minIncomingAssetAmounts_ = new uint256[](1);
        minIncomingAssetAmounts_[0] = minIncomingAssetAmount;

        // Format outgoing assets depending on if there are network fees
        uint256 totalNetworkFees = __calcTotalNetworkFees(paths);
        if (totalNetworkFees > 0) {
            // We are not performing special logic if the incomingAsset is the fee asset
            if (outgoingAsset == WETH_TOKEN) {
                spendAssets_ = new address[](1);
                spendAssets_[0] = outgoingAsset;

                spendAssetAmounts_ = new uint256[](1);
                spendAssetAmounts_[0] = outgoingAssetAmount.add(totalNetworkFees);
            } else {
                spendAssets_ = new address[](2);
                spendAssets_[0] = outgoingAsset;
                spendAssets_[1] = WETH_TOKEN;

                spendAssetAmounts_ = new uint256[](2);
                spendAssetAmounts_[0] = outgoingAssetAmount;
                spendAssetAmounts_[1] = totalNetworkFees;
            }
        } else {
            spendAssets_ = new address[](1);
            spendAssets_[0] = outgoingAsset;

            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = outgoingAssetAmount;
        }

        return (
            IIntegrationManager.SpendAssetsHandleType.Transfer,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @notice Trades assets on ParaSwap
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function takeOrder(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        __takeOrder(_vaultProxy, _encodedCallArgs);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to parse the total amount of network fees (in ETH) for the multiSwap() call
    function __calcTotalNetworkFees(IParaSwapAugustusSwapper.Path[] memory _paths)
        private
        pure
        returns (uint256 totalNetworkFees_)
    {
        for (uint256 i; i < _paths.length; i++) {
            totalNetworkFees_ = totalNetworkFees_.add(_paths[i].totalNetworkFee);
        }

        return totalNetworkFees_;
    }

    /// @dev Helper to decode the encoded callOnIntegration call arguments
    function __decodeCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (
            address incomingAsset_,
            uint256 minIncomingAssetAmount_,
            uint256 expectedIncomingAssetAmount_, // Passed as a courtesy to ParaSwap for analytics
            address outgoingAsset_,
            uint256 outgoingAssetAmount_,
            IParaSwapAugustusSwapper.Path[] memory paths_
        )
    {
        return
            abi.decode(
                _encodedCallArgs,
                (address, uint256, uint256, address, uint256, IParaSwapAugustusSwapper.Path[])
            );
    }

    /// @dev Helper to encode the call to ParaSwap multiSwap() as low-level calldata.
    /// Avoids the stack-too-deep error.
    function __encodeMultiSwapCallData(
        address _vaultProxy,
        address _incomingAsset,
        uint256 _minIncomingAssetAmount,
        uint256 _expectedIncomingAssetAmount, // Passed as a courtesy to ParaSwap for analytics
        address _outgoingAsset,
        uint256 _outgoingAssetAmount,
        IParaSwapAugustusSwapper.Path[] memory _paths
    ) private pure returns (bytes memory multiSwapCallData) {
        return
            abi.encodeWithSelector(
                IParaSwapAugustusSwapper.multiSwap.selector,
                _outgoingAsset, // fromToken
                _incomingAsset, // toToken
                _outgoingAssetAmount, // fromAmount
                _minIncomingAssetAmount, // toAmount
                _expectedIncomingAssetAmount, // expectedAmount
                _paths, // path
                0, // mintPrice
                payable(_vaultProxy), // beneficiary
                0, // donationPercentage
                REFERRER // referrer
            );
    }

    /// @dev Helper to execute ParaSwapAugustusSwapper.multiSwap() via a low-level call.
    /// Avoids the stack-too-deep error.
    function __executeMultiSwap(bytes memory _multiSwapCallData, uint256 _totalNetworkFees)
        private
    {
        (bool success, bytes memory returnData) = EXCHANGE.call{value: _totalNetworkFees}(
            _multiSwapCallData
        );
        require(success, string(returnData));
    }

    /// @dev Helper for the inner takeOrder() logic.
    /// Avoids the stack-too-deep error.
    function __takeOrder(address _vaultProxy, bytes memory _encodedCallArgs) private {
        (
            address incomingAsset,
            uint256 minIncomingAssetAmount,
            uint256 expectedIncomingAssetAmount,
            address outgoingAsset,
            uint256 outgoingAssetAmount,
            IParaSwapAugustusSwapper.Path[] memory paths
        ) = __decodeCallArgs(_encodedCallArgs);

        __approveMaxAsNeeded(outgoingAsset, TOKEN_TRANSFER_PROXY, outgoingAssetAmount);

        // If there are network fees, unwrap enough WETH to cover the fees
        uint256 totalNetworkFees = __calcTotalNetworkFees(paths);
        if (totalNetworkFees > 0) {
            __unwrapWeth(totalNetworkFees);
        }

        // Get the callData for the low-level multiSwap() call
        bytes memory multiSwapCallData = __encodeMultiSwapCallData(
            _vaultProxy,
            incomingAsset,
            minIncomingAssetAmount,
            expectedIncomingAssetAmount,
            outgoingAsset,
            outgoingAssetAmount,
            paths
        );

        // Execute the trade on ParaSwap
        __executeMultiSwap(multiSwapCallData, totalNetworkFees);

        // If fees were paid and ETH remains in the contract, wrap it as WETH so it can be returned
        if (totalNetworkFees > 0) {
            __wrapEth();
        }
    }

    /// @dev Helper to unwrap specified amount of WETH into ETH.
    /// Avoids the stack-too-deep error.
    function __unwrapWeth(uint256 _amount) private {
        IWETH(payable(WETH_TOKEN)).withdraw(_amount);
    }

    /// @dev Helper to wrap all ETH in contract as WETH.
    /// Avoids the stack-too-deep error.
    function __wrapEth() private {
        uint256 ethBalance = payable(address(this)).balance;
        if (ethBalance > 0) {
            IWETH(payable(WETH_TOKEN)).deposit{value: ethBalance}();
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `EXCHANGE` variable
    /// @return exchange_ The `EXCHANGE` variable value
    function getExchange() external view returns (address exchange_) {
        return EXCHANGE;
    }

    /// @notice Gets the `TOKEN_TRANSFER_PROXY` variable
    /// @return tokenTransferProxy_ The `TOKEN_TRANSFER_PROXY` variable value
    function getTokenTransferProxy() external view returns (address tokenTransferProxy_) {
        return TOKEN_TRANSFER_PROXY;
    }

    /// @notice Gets the `WETH_TOKEN` variable
    /// @return wethToken_ The `WETH_TOKEN` variable value
    function getWethToken() external view returns (address wethToken_) {
        return WETH_TOKEN;
    }
}

File 92 of 138 : IWETH.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title WETH Interface
/// @author Enzyme Council <[email protected]>
interface IWETH {
    function deposit() external payable;

    function withdraw(uint256) external;
}

File 93 of 138 : KyberAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "../../../../interfaces/IKyberNetworkProxy.sol";
import "../../../../interfaces/IWETH.sol";
import "../../../../utils/MathHelpers.sol";
import "../utils/AdapterBase.sol";

/// @title KyberAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with Kyber Network
contract KyberAdapter is AdapterBase, MathHelpers {
    address private immutable EXCHANGE;
    address private immutable WETH_TOKEN;

    constructor(
        address _integrationManager,
        address _exchange,
        address _wethToken
    ) public AdapterBase(_integrationManager) {
        EXCHANGE = _exchange;
        WETH_TOKEN = _wethToken;
    }

    /// @dev Needed to receive ETH from swap
    receive() external payable {}

    // EXTERNAL FUNCTIONS

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ An identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "KYBER_NETWORK";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        require(_selector == TAKE_ORDER_SELECTOR, "parseAssetsForMethod: _selector invalid");

        (
            address incomingAsset,
            uint256 minIncomingAssetAmount,
            address outgoingAsset,
            uint256 outgoingAssetAmount
        ) = __decodeCallArgs(_encodedCallArgs);

        require(
            incomingAsset != outgoingAsset,
            "parseAssetsForMethod: incomingAsset and outgoingAsset asset cannot be the same"
        );
        require(outgoingAssetAmount > 0, "parseAssetsForMethod: outgoingAssetAmount must be >0");

        spendAssets_ = new address[](1);
        spendAssets_[0] = outgoingAsset;
        spendAssetAmounts_ = new uint256[](1);
        spendAssetAmounts_[0] = outgoingAssetAmount;

        incomingAssets_ = new address[](1);
        incomingAssets_[0] = incomingAsset;
        minIncomingAssetAmounts_ = new uint256[](1);
        minIncomingAssetAmounts_[0] = minIncomingAssetAmount;

        return (
            IIntegrationManager.SpendAssetsHandleType.Transfer,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @notice Trades assets on Kyber
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function takeOrder(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        (
            address incomingAsset,
            uint256 minIncomingAssetAmount,
            address outgoingAsset,
            uint256 outgoingAssetAmount
        ) = __decodeCallArgs(_encodedCallArgs);

        uint256 minExpectedRate = __calcNormalizedRate(
            ERC20(outgoingAsset).decimals(),
            outgoingAssetAmount,
            ERC20(incomingAsset).decimals(),
            minIncomingAssetAmount
        );

        if (outgoingAsset == WETH_TOKEN) {
            __swapNativeAssetToToken(incomingAsset, outgoingAssetAmount, minExpectedRate);
        } else if (incomingAsset == WETH_TOKEN) {
            __swapTokenToNativeAsset(outgoingAsset, outgoingAssetAmount, minExpectedRate);
        } else {
            __swapTokenToToken(incomingAsset, outgoingAsset, outgoingAssetAmount, minExpectedRate);
        }
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to decode the encoded call arguments
    function __decodeCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (
            address incomingAsset_,
            uint256 minIncomingAssetAmount_,
            address outgoingAsset_,
            uint256 outgoingAssetAmount_
        )
    {
        return abi.decode(_encodedCallArgs, (address, uint256, address, uint256));
    }

    /// @dev Executes a swap of ETH to ERC20
    function __swapNativeAssetToToken(
        address _incomingAsset,
        uint256 _outgoingAssetAmount,
        uint256 _minExpectedRate
    ) private {
        IWETH(payable(WETH_TOKEN)).withdraw(_outgoingAssetAmount);

        IKyberNetworkProxy(EXCHANGE).swapEtherToToken{value: _outgoingAssetAmount}(
            _incomingAsset,
            _minExpectedRate
        );
    }

    /// @dev Executes a swap of ERC20 to ETH
    function __swapTokenToNativeAsset(
        address _outgoingAsset,
        uint256 _outgoingAssetAmount,
        uint256 _minExpectedRate
    ) private {
        __approveMaxAsNeeded(_outgoingAsset, EXCHANGE, _outgoingAssetAmount);

        IKyberNetworkProxy(EXCHANGE).swapTokenToEther(
            _outgoingAsset,
            _outgoingAssetAmount,
            _minExpectedRate
        );

        IWETH(payable(WETH_TOKEN)).deposit{value: payable(address(this)).balance}();
    }

    /// @dev Executes a swap of ERC20 to ERC20
    function __swapTokenToToken(
        address _incomingAsset,
        address _outgoingAsset,
        uint256 _outgoingAssetAmount,
        uint256 _minExpectedRate
    ) private {
        __approveMaxAsNeeded(_outgoingAsset, EXCHANGE, _outgoingAssetAmount);

        IKyberNetworkProxy(EXCHANGE).swapTokenToToken(
            _outgoingAsset,
            _outgoingAssetAmount,
            _incomingAsset,
            _minExpectedRate
        );
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `EXCHANGE` variable
    /// @return exchange_ The `EXCHANGE` variable value
    function getExchange() external view returns (address exchange_) {
        return EXCHANGE;
    }

    /// @notice Gets the `WETH_TOKEN` variable
    /// @return wethToken_ The `WETH_TOKEN` variable value
    function getWethToken() external view returns (address wethToken_) {
        return WETH_TOKEN;
    }
}

File 94 of 138 : IKyberNetworkProxy.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title Kyber Network interface
interface IKyberNetworkProxy {
    function swapEtherToToken(address, uint256) external payable returns (uint256);

    function swapTokenToEther(
        address,
        uint256,
        uint256
    ) external returns (uint256);

    function swapTokenToToken(
        address,
        uint256,
        address,
        uint256
    ) external returns (uint256);
}

File 95 of 138 : MockUniswapV2PriceSource.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../release/interfaces/IUniswapV2Pair.sol";
import "../tokens/MockToken.sol";

/// @dev This price source mocks the integration with Uniswap Pair
/// Docs of Uniswap Pair implementation: <https://uniswap.org/docs/v2/smart-contracts/pair/>
contract MockUniswapV2PriceSource is MockToken("Uniswap V2", "UNI-V2", 18) {
    address private immutable TOKEN_0;
    address private immutable TOKEN_1;

    constructor(address _token0, address _token1) public {
        TOKEN_0 = _token0;
        TOKEN_1 = _token1;
    }

    /// @dev returns reserves for each token on the Uniswap Pair
    /// Reserves will be used to calculate the pair price
    /// Inherited from IUniswapV2Pair
    function getReserves()
        external
        view
        returns (
            uint112 reserve0,
            uint112 reserve1,
            uint32 blockTimestampLast
        )
    {
        reserve0 = uint112(ERC20(token0()).balanceOf(address(this)));
        reserve1 = uint112(ERC20(token1()).balanceOf(address(this)));
        return (reserve0, reserve1, uint32(block.timestamp));
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @dev Inherited from IUniswapV2Pair
    function token0() public view returns (address) {
        return TOKEN_0;
    }

    /// @dev Inherited from IUniswapV2Pair
    function token1() public view returns (address) {
        return TOKEN_1;
    }

    /// @dev Inherited from IUniswapV2Pair
    function kLast() public pure returns (uint256) {
        return 0;
    }
}

File 96 of 138 : MockToken.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";

contract MockToken is ERC20Burnable {
    using SafeMath for uint256;

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) public ERC20(_name, _symbol) {
        _setupDecimals(_decimals);
        _mint(msg.sender, uint256(100000000).mul(10**uint256(_decimals)));
    }

    function mintFor(address _who, uint256 _amount) external {
        _mint(_who, _amount);
    }

    function mint(uint256 _amount) external {
        _mint(msg.sender, _amount);
    }
}

File 97 of 138 : ERC20Burnable.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.6.0;

import "../../GSN/Context.sol";
import "./ERC20.sol";

/**
 * @dev Extension of {ERC20} that allows token holders to destroy both their own
 * tokens and those that they have an allowance for, in a way that can be
 * recognized off-chain (via event analysis).
 */
abstract contract ERC20Burnable is Context, ERC20 {
    /**
     * @dev Destroys `amount` tokens from the caller.
     *
     * See {ERC20-_burn}.
     */
    function burn(uint256 amount) public virtual {
        _burn(_msgSender(), amount);
    }

    /**
     * @dev Destroys `amount` tokens from `account`, deducting from the caller's
     * allowance.
     *
     * See {ERC20-_burn} and {ERC20-allowance}.
     *
     * Requirements:
     *
     * - the caller must have allowance for ``accounts``'s tokens of at least
     * `amount`.
     */
    function burnFrom(address account, uint256 amount) public virtual {
        uint256 decreasedAllowance = allowance(account, _msgSender()).sub(amount, "ERC20: burn amount exceeds allowance");

        _approve(account, _msgSender(), decreasedAllowance);
        _burn(account, amount);
    }
}

File 98 of 138 : MockReentrancyToken.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../release/core/fund/comptroller/ComptrollerLib.sol";
import "./MockToken.sol";

/// @title MockReentrancyToken Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mock ERC20 token implementation that is able to re-entrance redeemShares and buyShares functions
contract MockReentrancyToken is MockToken("Mock Reentrancy Token", "MRT", 18) {
    bool public bad;
    address public comptrollerProxy;

    function makeItReentracyToken(address _comptrollerProxy) external {
        bad = true;
        comptrollerProxy = _comptrollerProxy;
    }

    function transfer(address recipient, uint256 amount) public override returns (bool) {
        if (bad) {
            ComptrollerLib(comptrollerProxy).redeemShares();
        } else {
            _transfer(_msgSender(), recipient, amount);
        }
        return true;
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public override returns (bool) {
        if (bad) {
            ComptrollerLib(comptrollerProxy).buyShares(
                new address[](0),
                new uint256[](0),
                new uint256[](0)
            );
        } else {
            _transfer(sender, recipient, amount);
        }
        return true;
    }
}

File 99 of 138 : MockSynthetixToken.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./../../release/interfaces/ISynthetixProxyERC20.sol";
import "./../../release/interfaces/ISynthetixSynth.sol";
import "./MockToken.sol";

contract MockSynthetixToken is ISynthetixProxyERC20, ISynthetixSynth, MockToken, Ownable {
    using SafeMath for uint256;

    bytes32 public override currencyKey;
    uint256 public constant WAITING_PERIOD_SECS = 3 * 60;

    mapping(address => uint256) public timelockByAccount;

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals,
        bytes32 _currencyKey
    ) public MockToken(_name, _symbol, _decimals) {
        currencyKey = _currencyKey;
    }

    function setCurrencyKey(bytes32 _currencyKey) external onlyOwner {
        currencyKey = _currencyKey;
    }

    function _isLocked(address account) internal view returns (bool) {
        return timelockByAccount[account] >= now;
    }

    function _beforeTokenTransfer(
        address from,
        address,
        uint256
    ) internal override {
        require(!_isLocked(from), "Cannot settle during waiting period");
    }

    function target() external view override returns (address) {
        return address(this);
    }

    function isLocked(address account) external view returns (bool) {
        return _isLocked(account);
    }

    function burnFrom(address account, uint256 amount) public override {
        _burn(account, amount);
    }

    function lock(address account) public {
        timelockByAccount[account] = now.add(WAITING_PERIOD_SECS);
    }

    function unlock(address account) public {
        timelockByAccount[account] = 0;
    }
}

File 100 of 138 : MockSynthetixPriceSource.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "./../../release/interfaces/ISynthetixExchangeRates.sol";
import "../prices/MockChainlinkPriceSource.sol";

/// @dev This price source offers two different options getting prices
/// The first one is getting a fixed rate, which can be useful for tests
/// The second approach calculates dinamically the rate making use of a chainlink price source
/// Mocks the functionality of the folllowing Synthetix contracts: { Exchanger, ExchangeRates }
contract MockSynthetixPriceSource is Ownable, ISynthetixExchangeRates {
    using SafeMath for uint256;

    mapping(bytes32 => uint256) private fixedRate;
    mapping(bytes32 => AggregatorInfo) private currencyKeyToAggregator;

    enum RateAsset {ETH, USD}

    struct AggregatorInfo {
        address aggregator;
        RateAsset rateAsset;
    }

    constructor(address _ethUsdAggregator) public {
        currencyKeyToAggregator[bytes32("ETH")] = AggregatorInfo({
            aggregator: _ethUsdAggregator,
            rateAsset: RateAsset.USD
        });
    }

    function setPriceSourcesForCurrencyKeys(
        bytes32[] calldata _currencyKeys,
        address[] calldata _aggregators,
        RateAsset[] calldata _rateAssets
    ) external onlyOwner {
        require(
            _currencyKeys.length == _aggregators.length &&
                _rateAssets.length == _aggregators.length
        );
        for (uint256 i = 0; i < _currencyKeys.length; i++) {
            currencyKeyToAggregator[_currencyKeys[i]] = AggregatorInfo({
                aggregator: _aggregators[i],
                rateAsset: _rateAssets[i]
            });
        }
    }

    function setRate(bytes32 _currencyKey, uint256 _rate) external onlyOwner {
        fixedRate[_currencyKey] = _rate;
    }

    /// @dev Calculates the rate from a currencty key against its RateAsset
    /// TODO: Use CentralizedRateProvider to randomize and make consistent with the rest
    function rateAndInvalid(bytes32 _currencyKey)
        external
        view
        override
        returns (uint256 rate_, bool isInvalid_)
    {
        uint256 storedRate = getFixedRate(_currencyKey);
        if (storedRate != 0) {
            rate_ = storedRate;
        } else {
            AggregatorInfo memory aggregatorInfo = getAggregatorFromCurrencyKey(_currencyKey);
            address aggregator = aggregatorInfo.aggregator;

            if (aggregator != address(0)) {
                uint256 decimals = MockChainlinkPriceSource(aggregator).decimals();
                rate_ = uint256(MockChainlinkPriceSource(aggregator).latestAnswer()).mul(
                    10**(uint256(18).sub(decimals))
                );

                if (aggregatorInfo.rateAsset == RateAsset.ETH) {
                    uint256 ethToUsd = uint256(
                        MockChainlinkPriceSource(
                            getAggregatorFromCurrencyKey(bytes32("ETH"))
                                .aggregator
                        )
                            .latestAnswer()
                    );
                    rate_ = rate_.mul(ethToUsd).div(10**8);
                }
            }
        }

        isInvalid_ = (rate_ == 0);
        return (rate_, isInvalid_);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    function getAggregatorFromCurrencyKey(bytes32 _currencyKey)
        public
        view
        returns (AggregatorInfo memory _aggregator)
    {
        return currencyKeyToAggregator[_currencyKey];
    }

    function getFixedRate(bytes32 _currencyKey) public view returns (uint256) {
        return fixedRate[_currencyKey];
    }
}

File 101 of 138 : MockChainlinkPriceSource.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

contract MockChainlinkPriceSource {
    event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 timestamp);

    uint256 public DECIMALS;

    int256 public latestAnswer;
    uint256 public latestTimestamp;
    uint256 public roundId;
    address public aggregator;

    constructor(uint256 _decimals) public {
        DECIMALS = _decimals;
        latestAnswer = int256(10**_decimals);
        latestTimestamp = now;
        roundId = 1;
        aggregator = address(this);
    }

    function setLatestAnswer(int256 _nextAnswer, uint256 _nextTimestamp) external {
        latestAnswer = _nextAnswer;
        latestTimestamp = _nextTimestamp;
        roundId = roundId + 1;

        emit AnswerUpdated(latestAnswer, roundId, latestTimestamp);
    }

    function setAggregator(address _nextAggregator) external {
        aggregator = _nextAggregator;
    }

    function decimals() public view returns (uint256) {
        return DECIMALS;
    }
}

File 102 of 138 : MockSynthetixIntegratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/access/Ownable.sol";
import "./../../release/interfaces/ISynthetixExchangeRates.sol";
import "./../tokens/MockSynthetixToken.sol";

/// @dev Synthetix Integratee. Mocks functionalities from the folllowing synthetix contracts
/// Synthetix, SynthetixAddressResolver, SynthetixDelegateApprovals
/// Link to contracts: <https://github.com/Synthetixio/synthetix/tree/develop/contracts>
contract MockSynthetixIntegratee is Ownable {
    using SafeMath for uint256;

    mapping(address => mapping(address => bool)) private authorizerToDelegateToApproval;
    mapping(bytes32 => address) private currencyKeyToSynth;

    address private immutable EXCHANGE_RATES;
    uint256 private immutable FEE;

    uint256 private constant UNIT_FEE = 1000;

    constructor(uint256 _fee, address _exchangeRates) public {
        FEE = _fee;
        EXCHANGE_RATES = address(_exchangeRates);
    }

    receive() external payable {}

    function exchangeOnBehalfWithTracking(
        address _exchangeForAddress,
        bytes32 _srcCurrencyKey,
        uint256 _srcAmount,
        bytes32 _destinationCurrencyKey,
        address,
        bytes32
    ) external returns (uint256 amountReceived_) {
        require(
            canExchangeFor(msg.sender, _exchangeForAddress),
            "exchangeOnBehalfWithTracking: Not approved to act on behalf"
        );

        amountReceived_ = __calculateAndSwap(
            _exchangeForAddress,
            _srcAmount,
            _srcCurrencyKey,
            _destinationCurrencyKey
        );

        return amountReceived_;
    }

    function getAmountsForExchange(
        uint256 _srcAmount,
        bytes32 _srcCurrencyKey,
        bytes32 _destCurrencyKey
    )
        public
        view
        returns (
            uint256 amountReceived_,
            uint256 fee_,
            uint256 exchangeFeeRate_
        )
    {
        ISynthetixExchangeRates exchangeRates = ISynthetixExchangeRates(EXCHANGE_RATES);
        require(
            currencyKeyToSynth[_srcCurrencyKey] != address(0) &&
                currencyKeyToSynth[_destCurrencyKey] != address(0),
            "getAmountsForExchange: Currency key doesn't have an associated synth"
        );

        (uint256 srcRate, ) = exchangeRates.rateAndInvalid(_srcCurrencyKey);
        (uint256 destRate, ) = exchangeRates.rateAndInvalid(_destCurrencyKey);
        uint256 destAmount = _srcAmount.mul(srcRate).div(destRate);

        exchangeFeeRate_ = FEE;
        amountReceived_ = destAmount.mul(UNIT_FEE.sub(exchangeFeeRate_)).div(UNIT_FEE);
        fee_ = destAmount.sub(amountReceived_);

        return (amountReceived_, fee_, exchangeFeeRate_);
    }

    function setSynthFromCurrencyKeys(bytes32[] calldata _currencyKeys, address[] calldata _synths)
        external
        onlyOwner
    {
        require(
            _currencyKeys.length == _synths.length,
            "setSynthFromCurrencyKey: Unequal _currencyKeys and _synths lengths"
        );
        for (uint256 i = 0; i < _currencyKeys.length; i++) {
            currencyKeyToSynth[_currencyKeys[i]] = _synths[i];
        }
    }

    function approveExchangeOnBehalf(address _delegate) external {
        authorizerToDelegateToApproval[msg.sender][_delegate] = true;
    }

    function __calculateAndSwap(
        address _exchangeForAddress,
        uint256 _srcAmount,
        bytes32 _srcCurrencyKey,
        bytes32 _destCurrencyKey
    ) private returns (uint256 amountReceived_) {
        MockSynthetixToken srcSynth = MockSynthetixToken(currencyKeyToSynth[_srcCurrencyKey]);
        MockSynthetixToken destSynth = MockSynthetixToken(currencyKeyToSynth[_destCurrencyKey]);

        require(address(srcSynth) != address(0), "__calculateAndSwap: Source synth is not listed");
        require(
            address(destSynth) != address(0),
            "__calculateAndSwap: Destination synth is not listed"
        );
        require(
            !srcSynth.isLocked(_exchangeForAddress),
            "__calculateAndSwap: Cannot settle during waiting period"
        );

        (amountReceived_, , ) = getAmountsForExchange(
            _srcAmount,
            _srcCurrencyKey,
            _destCurrencyKey
        );

        srcSynth.burnFrom(_exchangeForAddress, _srcAmount);
        destSynth.mintFor(_exchangeForAddress, amountReceived_);
        destSynth.lock(_exchangeForAddress);

        return amountReceived_;
    }

    function requireAndGetAddress(bytes32 _name, string calldata)
        external
        view
        returns (address resolvedAddress_)
    {
        if (_name == "ExchangeRates") {
            return EXCHANGE_RATES;
        }
        return address(this);
    }

    function settle(address, bytes32)
        external
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        // TODO
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    function canExchangeFor(address, address) public pure returns (bool canExchange_) {
        return true;
    }

    function getExchangeRates() public view returns (address exchangeRates_) {
        return EXCHANGE_RATES;
    }

    function getFee() public view returns (uint256 fee_) {
        return FEE;
    }

    function getSynthFromCurrencyKey(bytes32 _currencyKey) public view returns (address synth_) {
        return currencyKeyToSynth[_currencyKey];
    }

    function getUnitFee() public pure returns (uint256 fee_) {
        return UNIT_FEE;
    }
}

File 103 of 138 : MockKyberIntegratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../release/utils/MathHelpers.sol";
import "../prices/CentralizedRateProvider.sol";
import "../utils/SwapperBase.sol";

contract MockKyberIntegratee is SwapperBase, Ownable, MathHelpers {
    using SafeMath for uint256;

    address private immutable MOCK_CENTRALIZED_RATE_PROVIDER;
    address private immutable WETH;

    uint256 private constant PRECISION = 18;

    // Deviation set in % defines the MAX deviation per block from the mean rate
    uint256 private blockNumberDeviation;

    constructor(
        address _mockCentralizedRateProvider,
        address _weth,
        uint256 _blockNumberDeviation
    ) public {
        MOCK_CENTRALIZED_RATE_PROVIDER = _mockCentralizedRateProvider;
        WETH = _weth;
        blockNumberDeviation = _blockNumberDeviation;
    }

    function swapEtherToToken(address _destToken, uint256) external payable returns (uint256) {
        uint256 destAmount = CentralizedRateProvider(MOCK_CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValueRandomized(WETH, msg.value, _destToken, blockNumberDeviation);

        __swapAssets(msg.sender, ETH_ADDRESS, msg.value, _destToken, destAmount);
        return msg.value;
    }

    function swapTokenToEther(
        address _srcToken,
        uint256 _srcAmount,
        uint256
    ) external returns (uint256) {
        uint256 destAmount = CentralizedRateProvider(MOCK_CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValueRandomized(_srcToken, _srcAmount, WETH, blockNumberDeviation);

        __swapAssets(msg.sender, _srcToken, _srcAmount, ETH_ADDRESS, destAmount);
        return _srcAmount;
    }

    function swapTokenToToken(
        address _srcToken,
        uint256 _srcAmount,
        address _destToken,
        uint256
    ) external returns (uint256) {
        uint256 destAmount = CentralizedRateProvider(MOCK_CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValueRandomized(_srcToken, _srcAmount, _destToken, blockNumberDeviation);

        __swapAssets(msg.sender, _srcToken, _srcAmount, _destToken, destAmount);
        return _srcAmount;
    }

    function setBlockNumberDeviation(uint256 _deviationPct) external onlyOwner {
        blockNumberDeviation = _deviationPct;
    }

    function getExpectedRate(
        address _srcToken,
        address _destToken,
        uint256 _amount
    ) external returns (uint256 rate_, uint256 worstRate_) {
        if (_srcToken == ETH_ADDRESS) {
            _srcToken = WETH;
        }
        if (_destToken == ETH_ADDRESS) {
            _destToken = WETH;
        }

        uint256 destAmount = CentralizedRateProvider(MOCK_CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValueRandomizedBySender(_srcToken, _amount, _destToken);
        rate_ = __calcNormalizedRate(
            ERC20(_srcToken).decimals(),
            _amount,
            ERC20(_destToken).decimals(),
            destAmount
        );
        worstRate_ = rate_.mul(uint256(100).sub(blockNumberDeviation)).div(100);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    function getCentralizedRateProvider() public view returns (address) {
        return MOCK_CENTRALIZED_RATE_PROVIDER;
    }

    function getWeth() public view returns (address) {
        return WETH;
    }

    function getBlockNumberDeviation() public view returns (uint256) {
        return blockNumberDeviation;
    }

    function getPrecision() public pure returns (uint256) {
        return PRECISION;
    }
}

File 104 of 138 : AssetWhitelist.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../../core/fund/comptroller/ComptrollerLib.sol";
import "../../../../core/fund/vault/VaultLib.sol";
import "../../../../utils/AddressArrayLib.sol";
import "../utils/AddressListPolicyMixin.sol";
import "./utils/PostCallOnIntegrationValidatePolicyBase.sol";

/// @title AssetWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of assets in a fund's holdings
contract AssetWhitelist is PostCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
    using AddressArrayLib for address[];

    constructor(address _policyManager) public PolicyBase(_policyManager) {}

    /// @notice Validates and initializes a policy as necessary prior to fund activation
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _vaultProxy The fund's VaultProxy address
    function activateForFund(address _comptrollerProxy, address _vaultProxy)
        external
        override
        onlyPolicyManager
    {
        require(
            passesRule(_comptrollerProxy, VaultLib(_vaultProxy).getTrackedAssets()),
            "activateForFund: Non-whitelisted asset detected"
        );
    }

    /// @notice Add the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        address[] memory assets = abi.decode(_encodedSettings, (address[]));
        require(
            assets.contains(ComptrollerLib(_comptrollerProxy).getDenominationAsset()),
            "addFundSettings: Must whitelist denominationAsset"
        );

        __addToList(_comptrollerProxy, abi.decode(_encodedSettings, (address[])));
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "ASSET_WHITELIST";
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _assets The assets with which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, address[] memory _assets)
        public
        view
        returns (bool isValid_)
    {
        for (uint256 i; i < _assets.length; i++) {
            if (!isInList(_comptrollerProxy, _assets[i])) {
                return false;
            }
        }

        return true;
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (, , address[] memory incomingAssets, , , ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, incomingAssets);
    }
}

File 105 of 138 : AddressListPolicyMixin.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/utils/EnumerableSet.sol";

/// @title AddressListPolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice An abstract mixin contract for policies that use an address list
abstract contract AddressListPolicyMixin {
    using EnumerableSet for EnumerableSet.AddressSet;

    event AddressesAdded(address indexed comptrollerProxy, address[] items);

    event AddressesRemoved(address indexed comptrollerProxy, address[] items);

    mapping(address => EnumerableSet.AddressSet) private comptrollerProxyToList;

    // EXTERNAL FUNCTIONS

    /// @notice Get all addresses in a fund's list
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @return list_ The addresses in the fund's list
    function getList(address _comptrollerProxy) external view returns (address[] memory list_) {
        list_ = new address[](comptrollerProxyToList[_comptrollerProxy].length());
        for (uint256 i = 0; i < list_.length; i++) {
            list_[i] = comptrollerProxyToList[_comptrollerProxy].at(i);
        }
        return list_;
    }

    // PUBLIC FUNCTIONS

    /// @notice Check if an address is in a fund's list
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _item The address to check against the list
    /// @return isInList_ True if the address is in the list
    function isInList(address _comptrollerProxy, address _item)
        public
        view
        returns (bool isInList_)
    {
        return comptrollerProxyToList[_comptrollerProxy].contains(_item);
    }

    // INTERNAL FUNCTIONS

    /// @dev Helper to add addresses to the calling fund's list
    function __addToList(address _comptrollerProxy, address[] memory _items) internal {
        require(_items.length > 0, "__addToList: No addresses provided");

        for (uint256 i = 0; i < _items.length; i++) {
            require(
                comptrollerProxyToList[_comptrollerProxy].add(_items[i]),
                "__addToList: Address already exists in list"
            );
        }

        emit AddressesAdded(_comptrollerProxy, _items);
    }

    /// @dev Helper to remove addresses from the calling fund's list
    function __removeFromList(address _comptrollerProxy, address[] memory _items) internal {
        require(_items.length > 0, "__removeFromList: No addresses provided");

        for (uint256 i = 0; i < _items.length; i++) {
            require(
                comptrollerProxyToList[_comptrollerProxy].remove(_items[i]),
                "__removeFromList: Address does not exist in list"
            );
        }

        emit AddressesRemoved(_comptrollerProxy, _items);
    }
}

File 106 of 138 : AssetBlacklist.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../../core/fund/comptroller/ComptrollerLib.sol";
import "../../../../core/fund/vault/VaultLib.sol";
import "../../../../utils/AddressArrayLib.sol";
import "../utils/AddressListPolicyMixin.sol";
import "./utils/PostCallOnIntegrationValidatePolicyBase.sol";

/// @title AssetBlacklist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that disallows a configurable blacklist of assets in a fund's holdings
contract AssetBlacklist is PostCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
    using AddressArrayLib for address[];

    constructor(address _policyManager) public PolicyBase(_policyManager) {}

    /// @notice Validates and initializes a policy as necessary prior to fund activation
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _vaultProxy The fund's VaultProxy address
    function activateForFund(address _comptrollerProxy, address _vaultProxy)
        external
        override
        onlyPolicyManager
    {
        require(
            passesRule(_comptrollerProxy, VaultLib(_vaultProxy).getTrackedAssets()),
            "activateForFund: Blacklisted asset detected"
        );
    }

    /// @notice Add the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        address[] memory assets = abi.decode(_encodedSettings, (address[]));
        require(
            !assets.contains(ComptrollerLib(_comptrollerProxy).getDenominationAsset()),
            "addFundSettings: Cannot blacklist denominationAsset"
        );

        __addToList(_comptrollerProxy, assets);
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "ASSET_BLACKLIST";
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _assets The assets with which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, address[] memory _assets)
        public
        view
        returns (bool isValid_)
    {
        for (uint256 i; i < _assets.length; i++) {
            if (isInList(_comptrollerProxy, _assets[i])) {
                return false;
            }
        }

        return true;
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (, , address[] memory incomingAssets, , , ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, incomingAssets);
    }
}

File 107 of 138 : AdapterWhitelist.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../utils/AddressListPolicyMixin.sol";
import "./utils/PreCallOnIntegrationValidatePolicyBase.sol";

/// @title AdapterWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of adapters for use by a fund
contract AdapterWhitelist is PreCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
    constructor(address _policyManager) public PolicyBase(_policyManager) {}

    /// @notice Add the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        __addToList(_comptrollerProxy, abi.decode(_encodedSettings, (address[])));
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "ADAPTER_WHITELIST";
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _adapter The adapter with which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, address _adapter)
        public
        view
        returns (bool isValid_)
    {
        return isInList(_comptrollerProxy, _adapter);
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (address adapter, ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, adapter);
    }
}

File 108 of 138 : PreCallOnIntegrationValidatePolicyBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../utils/PolicyBase.sol";

/// @title CallOnIntegrationPreValidatePolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the PreCallOnIntegration policy hook
abstract contract PreCallOnIntegrationValidatePolicyBase is PolicyBase {
    /// @notice Gets the implemented PolicyHooks for a policy
    /// @return implementedHooks_ The implemented PolicyHooks
    function implementedHooks()
        external
        view
        override
        returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
    {
        implementedHooks_ = new IPolicyManager.PolicyHook[](1);
        implementedHooks_[0] = IPolicyManager.PolicyHook.PreCallOnIntegration;

        return implementedHooks_;
    }

    /// @notice Helper to decode rule arguments
    function __decodeRuleArgs(bytes memory _encodedRuleArgs)
        internal
        pure
        returns (address adapter_, bytes4 selector_)
    {
        return abi.decode(_encodedRuleArgs, (address, bytes4));
    }
}

File 109 of 138 : GuaranteedRedemption.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../utils/FundDeployerOwnerMixin.sol";
import "./utils/PreCallOnIntegrationValidatePolicyBase.sol";

/// @title GuaranteedRedemption Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that guarantees that shares will either be continuously redeemable or
/// redeemable within a predictable daily window by preventing trading during a configurable daily period
contract GuaranteedRedemption is PreCallOnIntegrationValidatePolicyBase, FundDeployerOwnerMixin {
    using SafeMath for uint256;

    event AdapterAdded(address adapter);

    event AdapterRemoved(address adapter);

    event FundSettingsSet(
        address indexed comptrollerProxy,
        uint256 startTimestamp,
        uint256 duration
    );

    event RedemptionWindowBufferSet(uint256 prevBuffer, uint256 nextBuffer);

    struct RedemptionWindow {
        uint256 startTimestamp;
        uint256 duration;
    }

    uint256 private constant ONE_DAY = 24 * 60 * 60;

    mapping(address => bool) private adapterToCanBlockRedemption;
    mapping(address => RedemptionWindow) private comptrollerProxyToRedemptionWindow;
    uint256 private redemptionWindowBuffer;

    constructor(
        address _policyManager,
        address _fundDeployer,
        uint256 _redemptionWindowBuffer,
        address[] memory _redemptionBlockingAdapters
    ) public PolicyBase(_policyManager) FundDeployerOwnerMixin(_fundDeployer) {
        redemptionWindowBuffer = _redemptionWindowBuffer;

        __addRedemptionBlockingAdapters(_redemptionBlockingAdapters);
    }

    // EXTERNAL FUNCTIONS

    /// @notice Add the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        (uint256 startTimestamp, uint256 duration) = abi.decode(
            _encodedSettings,
            (uint256, uint256)
        );

        if (startTimestamp == 0) {
            require(duration == 0, "addFundSettings: duration must be 0 if startTimestamp is 0");
            return;
        }

        // Use 23 hours instead of 1 day to allow up to 1 hr of redemptionWindowBuffer
        require(
            duration > 0 && duration <= 23 hours,
            "addFundSettings: duration must be between 1 second and 23 hours"
        );

        comptrollerProxyToRedemptionWindow[_comptrollerProxy].startTimestamp = startTimestamp;
        comptrollerProxyToRedemptionWindow[_comptrollerProxy].duration = duration;

        emit FundSettingsSet(_comptrollerProxy, startTimestamp, duration);
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "GUARANTEED_REDEMPTION";
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _adapter The adapter for which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, address _adapter)
        public
        view
        returns (bool isValid_)
    {
        if (!adapterCanBlockRedemption(_adapter)) {
            return true;
        }


            RedemptionWindow memory redemptionWindow
         = comptrollerProxyToRedemptionWindow[_comptrollerProxy];

        // If no RedemptionWindow is set, the fund can never use redemption-blocking adapters
        if (redemptionWindow.startTimestamp == 0) {
            return false;
        }

        uint256 latestRedemptionWindowStart = calcLatestRedemptionWindowStart(
            redemptionWindow.startTimestamp
        );

        // A fund can't trade during its redemption window, nor in the buffer beforehand.
        // The lower bound is only relevant when the startTimestamp is in the future,
        // so we check it last.
        if (
            block.timestamp >= latestRedemptionWindowStart.add(redemptionWindow.duration) ||
            block.timestamp <= latestRedemptionWindowStart.sub(redemptionWindowBuffer)
        ) {
            return true;
        }

        return false;
    }

    /// @notice Sets a new value for the redemptionWindowBuffer variable
    /// @param _nextRedemptionWindowBuffer The number of seconds for the redemptionWindowBuffer
    /// @dev The redemptionWindowBuffer is added to the beginning of the redemption window,
    /// and should always be >= the longest potential block on redemption amongst all adapters.
    /// (e.g., Synthetix blocks token transfers during a timelock after trading synths)
    function setRedemptionWindowBuffer(uint256 _nextRedemptionWindowBuffer)
        external
        onlyFundDeployerOwner
    {
        uint256 prevRedemptionWindowBuffer = redemptionWindowBuffer;
        require(
            _nextRedemptionWindowBuffer != prevRedemptionWindowBuffer,
            "setRedemptionWindowBuffer: Value already set"
        );

        redemptionWindowBuffer = _nextRedemptionWindowBuffer;

        emit RedemptionWindowBufferSet(prevRedemptionWindowBuffer, _nextRedemptionWindowBuffer);
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (address adapter, ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, adapter);
    }

    // PUBLIC FUNCTIONS

    /// @notice Calculates the start of the most recent redemption window
    /// @param _startTimestamp The initial startTimestamp for the redemption window
    /// @return latestRedemptionWindowStart_ The starting timestamp of the most recent redemption window
    function calcLatestRedemptionWindowStart(uint256 _startTimestamp)
        public
        view
        returns (uint256 latestRedemptionWindowStart_)
    {
        if (block.timestamp <= _startTimestamp) {
            return _startTimestamp;
        }

        uint256 timeSinceStartTimestamp = block.timestamp.sub(_startTimestamp);
        uint256 timeSincePeriodStart = timeSinceStartTimestamp.mod(ONE_DAY);

        return block.timestamp.sub(timeSincePeriodStart);
    }

    ///////////////////////////////////////////
    // REDEMPTION-BLOCKING ADAPTERS REGISTRY //
    ///////////////////////////////////////////

    /// @notice Add adapters which can block shares redemption
    /// @param _adapters The addresses of adapters to be added
    function addRedemptionBlockingAdapters(address[] calldata _adapters)
        external
        onlyFundDeployerOwner
    {
        require(
            _adapters.length > 0,
            "__addRedemptionBlockingAdapters: _adapters cannot be empty"
        );

        __addRedemptionBlockingAdapters(_adapters);
    }

    /// @notice Remove adapters which can block shares redemption
    /// @param _adapters The addresses of adapters to be removed
    function removeRedemptionBlockingAdapters(address[] calldata _adapters)
        external
        onlyFundDeployerOwner
    {
        require(
            _adapters.length > 0,
            "removeRedemptionBlockingAdapters: _adapters cannot be empty"
        );

        for (uint256 i; i < _adapters.length; i++) {
            require(
                adapterCanBlockRedemption(_adapters[i]),
                "removeRedemptionBlockingAdapters: adapter is not added"
            );

            adapterToCanBlockRedemption[_adapters[i]] = false;

            emit AdapterRemoved(_adapters[i]);
        }
    }

    /// @dev Helper to mark adapters that can block shares redemption
    function __addRedemptionBlockingAdapters(address[] memory _adapters) private {
        for (uint256 i; i < _adapters.length; i++) {
            require(
                _adapters[i] != address(0),
                "__addRedemptionBlockingAdapters: adapter cannot be empty"
            );
            require(
                !adapterCanBlockRedemption(_adapters[i]),
                "__addRedemptionBlockingAdapters: adapter already added"
            );

            adapterToCanBlockRedemption[_adapters[i]] = true;

            emit AdapterAdded(_adapters[i]);
        }
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `redemptionWindowBuffer` variable
    /// @return redemptionWindowBuffer_ The `redemptionWindowBuffer` variable value
    function getRedemptionWindowBuffer() external view returns (uint256 redemptionWindowBuffer_) {
        return redemptionWindowBuffer;
    }

    /// @notice Gets the RedemptionWindow settings for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return redemptionWindow_ The RedemptionWindow settings
    function getRedemptionWindowForFund(address _comptrollerProxy)
        external
        view
        returns (RedemptionWindow memory redemptionWindow_)
    {
        return comptrollerProxyToRedemptionWindow[_comptrollerProxy];
    }

    /// @notice Checks whether an adapter can block shares redemption
    /// @param _adapter The address of the adapter to check
    /// @return canBlockRedemption_ True if the adapter can block shares redemption
    function adapterCanBlockRedemption(address _adapter)
        public
        view
        returns (bool canBlockRedemption_)
    {
        return adapterToCanBlockRedemption[_adapter];
    }
}

File 110 of 138 : AdapterBlacklist.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../utils/AddressListPolicyMixin.sol";
import "./utils/PreCallOnIntegrationValidatePolicyBase.sol";

/// @title AdapterBlacklist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that disallows a configurable blacklist of adapters from use by a fund
contract AdapterBlacklist is PreCallOnIntegrationValidatePolicyBase, AddressListPolicyMixin {
    constructor(address _policyManager) public PolicyBase(_policyManager) {}

    /// @notice Add the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        __addToList(_comptrollerProxy, abi.decode(_encodedSettings, (address[])));
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "ADAPTER_BLACKLIST";
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _adapter The adapter with which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, address _adapter)
        public
        view
        returns (bool isValid_)
    {
        return !isInList(_comptrollerProxy, _adapter);
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (address adapter, ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, adapter);
    }
}

File 111 of 138 : InvestorWhitelist.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../utils/AddressListPolicyMixin.sol";
import "./utils/PreBuySharesValidatePolicyBase.sol";

/// @title InvestorWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of investors to buy shares in a fund
contract InvestorWhitelist is PreBuySharesValidatePolicyBase, AddressListPolicyMixin {
    constructor(address _policyManager) public PolicyBase(_policyManager) {}

    /// @notice Adds the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        __updateList(_comptrollerProxy, _encodedSettings);
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "INVESTOR_WHITELIST";
    }

    /// @notice Updates the policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function updateFundSettings(
        address _comptrollerProxy,
        address,
        bytes calldata _encodedSettings
    ) external override onlyPolicyManager {
        __updateList(_comptrollerProxy, _encodedSettings);
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _investor The investor for which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, address _investor)
        public
        view
        returns (bool isValid_)
    {
        return isInList(_comptrollerProxy, _investor);
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (address buyer, , , ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, buyer);
    }

    /// @dev Helper to update the investor whitelist by adding and/or removing addresses
    function __updateList(address _comptrollerProxy, bytes memory _settingsData) private {
        (address[] memory itemsToAdd, address[] memory itemsToRemove) = abi.decode(
            _settingsData,
            (address[], address[])
        );

        // If an address is in both add and remove arrays, they will not be in the final list.
        // We do not check for uniqueness between the two arrays for efficiency.
        if (itemsToAdd.length > 0) {
            __addToList(_comptrollerProxy, itemsToAdd);
        }
        if (itemsToRemove.length > 0) {
            __removeFromList(_comptrollerProxy, itemsToRemove);
        }
    }
}

File 112 of 138 : PreBuySharesValidatePolicyBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../utils/PolicyBase.sol";

/// @title BuySharesPolicyMixin Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the PreBuyShares policy hook
abstract contract PreBuySharesValidatePolicyBase is PolicyBase {
    /// @notice Gets the implemented PolicyHooks for a policy
    /// @return implementedHooks_ The implemented PolicyHooks
    function implementedHooks()
        external
        view
        override
        returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
    {
        implementedHooks_ = new IPolicyManager.PolicyHook[](1);
        implementedHooks_[0] = IPolicyManager.PolicyHook.PreBuyShares;

        return implementedHooks_;
    }

    /// @notice Helper to decode rule arguments
    function __decodeRuleArgs(bytes memory _encodedArgs)
        internal
        pure
        returns (
            address buyer_,
            uint256 investmentAmount_,
            uint256 minSharesQuantity_,
            uint256 gav_
        )
    {
        return abi.decode(_encodedArgs, (address, uint256, uint256, uint256));
    }
}

File 113 of 138 : MinMaxInvestment.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
pragma experimental ABIEncoderV2;

import "./utils/PreBuySharesValidatePolicyBase.sol";

/// @title MinMaxInvestment Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that restricts the amount of the fund's denomination asset that a user can
/// send in a single call to buy shares in a fund
contract MinMaxInvestment is PreBuySharesValidatePolicyBase {
    event FundSettingsSet(
        address indexed comptrollerProxy,
        uint256 minInvestmentAmount,
        uint256 maxInvestmentAmount
    );

    struct FundSettings {
        uint256 minInvestmentAmount;
        uint256 maxInvestmentAmount;
    }

    mapping(address => FundSettings) private comptrollerProxyToFundSettings;

    constructor(address _policyManager) public PolicyBase(_policyManager) {}

    /// @notice Adds the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        __setFundSettings(_comptrollerProxy, _encodedSettings);
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "MIN_MAX_INVESTMENT";
    }

    /// @notice Updates the policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function updateFundSettings(
        address _comptrollerProxy,
        address,
        bytes calldata _encodedSettings
    ) external override onlyPolicyManager {
        __setFundSettings(_comptrollerProxy, _encodedSettings);
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _investmentAmount The investment amount for which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, uint256 _investmentAmount)
        public
        view
        returns (bool isValid_)
    {
        uint256 minInvestmentAmount = comptrollerProxyToFundSettings[_comptrollerProxy]
            .minInvestmentAmount;
        uint256 maxInvestmentAmount = comptrollerProxyToFundSettings[_comptrollerProxy]
            .maxInvestmentAmount;

        // Both minInvestmentAmount and maxInvestmentAmount can be 0 in order to close the fund
        // temporarily
        if (minInvestmentAmount == 0) {
            return _investmentAmount <= maxInvestmentAmount;
        } else if (maxInvestmentAmount == 0) {
            return _investmentAmount >= minInvestmentAmount;
        }
        return
            _investmentAmount >= minInvestmentAmount && _investmentAmount <= maxInvestmentAmount;
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (, uint256 investmentAmount, , ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, investmentAmount);
    }

    /// @dev Helper to set the policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function __setFundSettings(address _comptrollerProxy, bytes memory _encodedSettings) private {
        (uint256 minInvestmentAmount, uint256 maxInvestmentAmount) = abi.decode(
            _encodedSettings,
            (uint256, uint256)
        );

        require(
            maxInvestmentAmount == 0 || minInvestmentAmount < maxInvestmentAmount,
            "__setFundSettings: minInvestmentAmount must be less than maxInvestmentAmount"
        );

        comptrollerProxyToFundSettings[_comptrollerProxy]
            .minInvestmentAmount = minInvestmentAmount;
        comptrollerProxyToFundSettings[_comptrollerProxy]
            .maxInvestmentAmount = maxInvestmentAmount;

        emit FundSettingsSet(_comptrollerProxy, minInvestmentAmount, maxInvestmentAmount);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the min and max investment amount for a given fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @return fundSettings_ The fund settings
    function getFundSettings(address _comptrollerProxy)
        external
        view
        returns (FundSettings memory fundSettings_)
    {
        return comptrollerProxyToFundSettings[_comptrollerProxy];
    }
}

File 114 of 138 : BuySharesCallerWhitelist.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../utils/AddressListPolicyMixin.sol";
import "./utils/BuySharesSetupPolicyBase.sol";

/// @title BuySharesCallerWhitelist Contract
/// @author Enzyme Council <[email protected]>
/// @notice A policy that only allows a configurable whitelist of buyShares callers for a fund
contract BuySharesCallerWhitelist is BuySharesSetupPolicyBase, AddressListPolicyMixin {
    constructor(address _policyManager) public PolicyBase(_policyManager) {}

    /// @notice Adds the initial policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _encodedSettings)
        external
        override
        onlyPolicyManager
    {
        __updateList(_comptrollerProxy, _encodedSettings);
    }

    /// @notice Provides a constant string identifier for a policy
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "BUY_SHARES_CALLER_WHITELIST";
    }

    /// @notice Updates the policy settings for a fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedSettings Encoded settings to apply to a fund
    function updateFundSettings(
        address _comptrollerProxy,
        address,
        bytes calldata _encodedSettings
    ) external override onlyPolicyManager {
        __updateList(_comptrollerProxy, _encodedSettings);
    }

    /// @notice Checks whether a particular condition passes the rule for a particular fund
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _buySharesCaller The buyShares caller for which to check the rule
    /// @return isValid_ True if the rule passes
    function passesRule(address _comptrollerProxy, address _buySharesCaller)
        public
        view
        returns (bool isValid_)
    {
        return isInList(_comptrollerProxy, _buySharesCaller);
    }

    /// @notice Apply the rule with the specified parameters of a PolicyHook
    /// @param _comptrollerProxy The fund's ComptrollerProxy address
    /// @param _encodedArgs Encoded args with which to validate the rule
    /// @return isValid_ True if the rule passes
    function validateRule(
        address _comptrollerProxy,
        address,
        IPolicyManager.PolicyHook,
        bytes calldata _encodedArgs
    ) external override returns (bool isValid_) {
        (address caller, , ) = __decodeRuleArgs(_encodedArgs);

        return passesRule(_comptrollerProxy, caller);
    }

    /// @dev Helper to update the whitelist by adding and/or removing addresses
    function __updateList(address _comptrollerProxy, bytes memory _settingsData) private {
        (address[] memory itemsToAdd, address[] memory itemsToRemove) = abi.decode(
            _settingsData,
            (address[], address[])
        );

        // If an address is in both add and remove arrays, they will not be in the final list.
        // We do not check for uniqueness between the two arrays for efficiency.
        if (itemsToAdd.length > 0) {
            __addToList(_comptrollerProxy, itemsToAdd);
        }
        if (itemsToRemove.length > 0) {
            __removeFromList(_comptrollerProxy, itemsToRemove);
        }
    }
}

File 115 of 138 : BuySharesSetupPolicyBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../utils/PolicyBase.sol";

/// @title BuySharesSetupPolicyBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mixin contract for policies that only implement the BuySharesSetup policy hook
abstract contract BuySharesSetupPolicyBase is PolicyBase {
    /// @notice Gets the implemented PolicyHooks for a policy
    /// @return implementedHooks_ The implemented PolicyHooks
    function implementedHooks()
        external
        view
        override
        returns (IPolicyManager.PolicyHook[] memory implementedHooks_)
    {
        implementedHooks_ = new IPolicyManager.PolicyHook[](1);
        implementedHooks_[0] = IPolicyManager.PolicyHook.BuySharesSetup;

        return implementedHooks_;
    }

    /// @notice Helper to decode rule arguments
    function __decodeRuleArgs(bytes memory _encodedArgs)
        internal
        pure
        returns (
            address caller_,
            uint256[] memory investmentAmounts_,
            uint256 gav_
        )
    {
        return abi.decode(_encodedArgs, (address, uint256[], uint256));
    }
}

File 116 of 138 : TrackedAssetsAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../../core/fund/vault/VaultLib.sol";
import "../utils/AdapterBase.sol";

/// @title TrackedAssetsAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter to add tracked assets to a fund (useful e.g. to handle token airdrops)
contract TrackedAssetsAdapter is AdapterBase {
    constructor(address _integrationManager) public AdapterBase(_integrationManager) {}

    /// @notice Add multiple assets to the Vault's list of tracked assets
    /// @dev No need to perform any validation or implement any logic
    function addTrackedAssets(
        address,
        bytes calldata,
        bytes calldata
    ) external view {}

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "TRACKED_ASSETS";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        require(
            _selector == ADD_TRACKED_ASSETS_SELECTOR,
            "parseAssetsForMethod: _selector invalid"
        );

        incomingAssets_ = __decodeCallArgs(_encodedCallArgs);

        minIncomingAssetAmounts_ = new uint256[](incomingAssets_.length);
        for (uint256 i; i < minIncomingAssetAmounts_.length; i++) {
            minIncomingAssetAmounts_[i] = 1;
        }

        return (
            spendAssetsHandleType_,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to decode the encoded call arguments
    function __decodeCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (address[] memory incomingAssets_)
    {
        return abi.decode(_encodedCallArgs, (address[]));
    }
}

File 117 of 138 : Dispatcher.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../utils/IMigrationHookHandler.sol";
import "../utils/IMigratableVault.sol";
import "../vault/VaultProxy.sol";
import "./IDispatcher.sol";

/// @title Dispatcher Contract
/// @author Enzyme Council <[email protected]>
/// @notice The top-level contract linking multiple releases.
/// It handles the deployment of new VaultProxy instances,
/// and the regulation of fund migration from a previous release to the current one.
/// It can also be referred to for access-control based on this contract's owner.
/// @dev DO NOT EDIT CONTRACT
contract Dispatcher is IDispatcher {
    event CurrentFundDeployerSet(address prevFundDeployer, address nextFundDeployer);

    event MigrationCancelled(
        address indexed vaultProxy,
        address indexed prevFundDeployer,
        address indexed nextFundDeployer,
        address nextVaultAccessor,
        address nextVaultLib,
        uint256 executableTimestamp
    );

    event MigrationExecuted(
        address indexed vaultProxy,
        address indexed prevFundDeployer,
        address indexed nextFundDeployer,
        address nextVaultAccessor,
        address nextVaultLib,
        uint256 executableTimestamp
    );

    event MigrationSignaled(
        address indexed vaultProxy,
        address indexed prevFundDeployer,
        address indexed nextFundDeployer,
        address nextVaultAccessor,
        address nextVaultLib,
        uint256 executableTimestamp
    );

    event MigrationTimelockSet(uint256 prevTimelock, uint256 nextTimelock);

    event NominatedOwnerSet(address indexed nominatedOwner);

    event NominatedOwnerRemoved(address indexed nominatedOwner);

    event OwnershipTransferred(address indexed prevOwner, address indexed nextOwner);

    event MigrationInCancelHookFailed(
        bytes failureReturnData,
        address indexed vaultProxy,
        address indexed prevFundDeployer,
        address indexed nextFundDeployer,
        address nextVaultAccessor,
        address nextVaultLib
    );

    event MigrationOutHookFailed(
        bytes failureReturnData,
        IMigrationHookHandler.MigrationOutHook hook,
        address indexed vaultProxy,
        address indexed prevFundDeployer,
        address indexed nextFundDeployer,
        address nextVaultAccessor,
        address nextVaultLib
    );

    event SharesTokenSymbolSet(string _nextSymbol);

    event VaultProxyDeployed(
        address indexed fundDeployer,
        address indexed owner,
        address vaultProxy,
        address indexed vaultLib,
        address vaultAccessor,
        string fundName
    );

    struct MigrationRequest {
        address nextFundDeployer;
        address nextVaultAccessor;
        address nextVaultLib;
        uint256 executableTimestamp;
    }

    address private currentFundDeployer;
    address private nominatedOwner;
    address private owner;
    uint256 private migrationTimelock;
    string private sharesTokenSymbol;
    mapping(address => address) private vaultProxyToFundDeployer;
    mapping(address => MigrationRequest) private vaultProxyToMigrationRequest;

    modifier onlyCurrentFundDeployer() {
        require(
            msg.sender == currentFundDeployer,
            "Only the current FundDeployer can call this function"
        );
        _;
    }

    modifier onlyOwner() {
        require(msg.sender == owner, "Only the contract owner can call this function");
        _;
    }

    constructor() public {
        migrationTimelock = 2 days;
        owner = msg.sender;
        sharesTokenSymbol = "ENZF";
    }

    /////////////
    // GENERAL //
    /////////////

    /// @notice Sets a new `symbol` value for VaultProxy instances
    /// @param _nextSymbol The symbol value to set
    function setSharesTokenSymbol(string calldata _nextSymbol) external override onlyOwner {
        sharesTokenSymbol = _nextSymbol;

        emit SharesTokenSymbolSet(_nextSymbol);
    }

    ////////////////////
    // ACCESS CONTROL //
    ////////////////////

    /// @notice Claim ownership of the contract
    function claimOwnership() external override {
        address nextOwner = nominatedOwner;
        require(
            msg.sender == nextOwner,
            "claimOwnership: Only the nominatedOwner can call this function"
        );

        delete nominatedOwner;

        address prevOwner = owner;
        owner = nextOwner;

        emit OwnershipTransferred(prevOwner, nextOwner);
    }

    /// @notice Revoke the nomination of a new contract owner
    function removeNominatedOwner() external override onlyOwner {
        address removedNominatedOwner = nominatedOwner;
        require(
            removedNominatedOwner != address(0),
            "removeNominatedOwner: There is no nominated owner"
        );

        delete nominatedOwner;

        emit NominatedOwnerRemoved(removedNominatedOwner);
    }

    /// @notice Set a new FundDeployer for use within the contract
    /// @param _nextFundDeployer The address of the FundDeployer contract
    function setCurrentFundDeployer(address _nextFundDeployer) external override onlyOwner {
        require(
            _nextFundDeployer != address(0),
            "setCurrentFundDeployer: _nextFundDeployer cannot be empty"
        );
        require(
            __isContract(_nextFundDeployer),
            "setCurrentFundDeployer: Non-contract _nextFundDeployer"
        );

        address prevFundDeployer = currentFundDeployer;
        require(
            _nextFundDeployer != prevFundDeployer,
            "setCurrentFundDeployer: _nextFundDeployer is already currentFundDeployer"
        );

        currentFundDeployer = _nextFundDeployer;

        emit CurrentFundDeployerSet(prevFundDeployer, _nextFundDeployer);
    }

    /// @notice Nominate a new contract owner
    /// @param _nextNominatedOwner The account to nominate
    /// @dev Does not prohibit overwriting the current nominatedOwner
    function setNominatedOwner(address _nextNominatedOwner) external override onlyOwner {
        require(
            _nextNominatedOwner != address(0),
            "setNominatedOwner: _nextNominatedOwner cannot be empty"
        );
        require(
            _nextNominatedOwner != owner,
            "setNominatedOwner: _nextNominatedOwner is already the owner"
        );
        require(
            _nextNominatedOwner != nominatedOwner,
            "setNominatedOwner: _nextNominatedOwner is already nominated"
        );

        nominatedOwner = _nextNominatedOwner;

        emit NominatedOwnerSet(_nextNominatedOwner);
    }

    /// @dev Helper to check whether an address is a deployed contract
    function __isContract(address _who) private view returns (bool isContract_) {
        uint256 size;
        assembly {
            size := extcodesize(_who)
        }

        return size > 0;
    }

    ////////////////
    // DEPLOYMENT //
    ////////////////

    /// @notice Deploys a VaultProxy
    /// @param _vaultLib The VaultLib library with which to instantiate the VaultProxy
    /// @param _owner The account to set as the VaultProxy's owner
    /// @param _vaultAccessor The account to set as the VaultProxy's permissioned accessor
    /// @param _fundName The name of the fund
    /// @dev Input validation should be handled by the VaultProxy during deployment
    function deployVaultProxy(
        address _vaultLib,
        address _owner,
        address _vaultAccessor,
        string calldata _fundName
    ) external override onlyCurrentFundDeployer returns (address vaultProxy_) {
        require(__isContract(_vaultAccessor), "deployVaultProxy: Non-contract _vaultAccessor");

        bytes memory constructData = abi.encodeWithSelector(
            IMigratableVault.init.selector,
            _owner,
            _vaultAccessor,
            _fundName
        );
        vaultProxy_ = address(new VaultProxy(constructData, _vaultLib));

        address fundDeployer = msg.sender;
        vaultProxyToFundDeployer[vaultProxy_] = fundDeployer;

        emit VaultProxyDeployed(
            fundDeployer,
            _owner,
            vaultProxy_,
            _vaultLib,
            _vaultAccessor,
            _fundName
        );

        return vaultProxy_;
    }

    ////////////////
    // MIGRATIONS //
    ////////////////

    /// @notice Cancels a pending migration request
    /// @param _vaultProxy The VaultProxy contract for which to cancel the migration request
    /// @param _bypassFailure True if a failure in either migration hook should be ignored
    /// @dev Because this function must also be callable by a permissioned migrator, it has an
    /// extra migration hook to the nextFundDeployer for the case where cancelMigration()
    /// is called directly (rather than via the nextFundDeployer).
    function cancelMigration(address _vaultProxy, bool _bypassFailure) external override {
        MigrationRequest memory request = vaultProxyToMigrationRequest[_vaultProxy];
        address nextFundDeployer = request.nextFundDeployer;
        require(nextFundDeployer != address(0), "cancelMigration: No migration request exists");

        // TODO: confirm that if canMigrate() does not exist but the caller is a valid FundDeployer, this still works.
        require(
            msg.sender == nextFundDeployer || IMigratableVault(_vaultProxy).canMigrate(msg.sender),
            "cancelMigration: Not an allowed caller"
        );

        address prevFundDeployer = vaultProxyToFundDeployer[_vaultProxy];
        address nextVaultAccessor = request.nextVaultAccessor;
        address nextVaultLib = request.nextVaultLib;
        uint256 executableTimestamp = request.executableTimestamp;

        delete vaultProxyToMigrationRequest[_vaultProxy];

        __invokeMigrationOutHook(
            IMigrationHookHandler.MigrationOutHook.PostCancel,
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            nextVaultAccessor,
            nextVaultLib,
            _bypassFailure
        );
        __invokeMigrationInCancelHook(
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            nextVaultAccessor,
            nextVaultLib,
            _bypassFailure
        );

        emit MigrationCancelled(
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            nextVaultAccessor,
            nextVaultLib,
            executableTimestamp
        );
    }

    /// @notice Executes a pending migration request
    /// @param _vaultProxy The VaultProxy contract for which to execute the migration request
    /// @param _bypassFailure True if a failure in either migration hook should be ignored
    function executeMigration(address _vaultProxy, bool _bypassFailure) external override {
        MigrationRequest memory request = vaultProxyToMigrationRequest[_vaultProxy];
        address nextFundDeployer = request.nextFundDeployer;
        require(
            nextFundDeployer != address(0),
            "executeMigration: No migration request exists for _vaultProxy"
        );
        require(
            msg.sender == nextFundDeployer,
            "executeMigration: Only the target FundDeployer can call this function"
        );
        require(
            nextFundDeployer == currentFundDeployer,
            "executeMigration: The target FundDeployer is no longer the current FundDeployer"
        );
        uint256 executableTimestamp = request.executableTimestamp;
        require(
            block.timestamp >= executableTimestamp,
            "executeMigration: The migration timelock has not elapsed"
        );

        address prevFundDeployer = vaultProxyToFundDeployer[_vaultProxy];
        address nextVaultAccessor = request.nextVaultAccessor;
        address nextVaultLib = request.nextVaultLib;

        __invokeMigrationOutHook(
            IMigrationHookHandler.MigrationOutHook.PreMigrate,
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            nextVaultAccessor,
            nextVaultLib,
            _bypassFailure
        );

        // Upgrade the VaultProxy to a new VaultLib and update the accessor via the new VaultLib
        IMigratableVault(_vaultProxy).setVaultLib(nextVaultLib);
        IMigratableVault(_vaultProxy).setAccessor(nextVaultAccessor);

        // Update the FundDeployer that migrated the VaultProxy
        vaultProxyToFundDeployer[_vaultProxy] = nextFundDeployer;

        // Remove the migration request
        delete vaultProxyToMigrationRequest[_vaultProxy];

        __invokeMigrationOutHook(
            IMigrationHookHandler.MigrationOutHook.PostMigrate,
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            nextVaultAccessor,
            nextVaultLib,
            _bypassFailure
        );

        emit MigrationExecuted(
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            nextVaultAccessor,
            nextVaultLib,
            executableTimestamp
        );
    }

    /// @notice Sets a new migration timelock
    /// @param _nextTimelock The number of seconds for the new timelock
    function setMigrationTimelock(uint256 _nextTimelock) external override onlyOwner {
        uint256 prevTimelock = migrationTimelock;
        require(
            _nextTimelock != prevTimelock,
            "setMigrationTimelock: _nextTimelock is the current timelock"
        );

        migrationTimelock = _nextTimelock;

        emit MigrationTimelockSet(prevTimelock, _nextTimelock);
    }

    /// @notice Signals a migration by creating a migration request
    /// @param _vaultProxy The VaultProxy contract for which to signal migration
    /// @param _nextVaultAccessor The account that will be the next `accessor` on the VaultProxy
    /// @param _nextVaultLib The next VaultLib library contract address to set on the VaultProxy
    /// @param _bypassFailure True if a failure in either migration hook should be ignored
    function signalMigration(
        address _vaultProxy,
        address _nextVaultAccessor,
        address _nextVaultLib,
        bool _bypassFailure
    ) external override onlyCurrentFundDeployer {
        require(
            __isContract(_nextVaultAccessor),
            "signalMigration: Non-contract _nextVaultAccessor"
        );

        address prevFundDeployer = vaultProxyToFundDeployer[_vaultProxy];
        require(prevFundDeployer != address(0), "signalMigration: _vaultProxy does not exist");

        address nextFundDeployer = msg.sender;
        require(
            nextFundDeployer != prevFundDeployer,
            "signalMigration: Can only migrate to a new FundDeployer"
        );

        __invokeMigrationOutHook(
            IMigrationHookHandler.MigrationOutHook.PreSignal,
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            _nextVaultAccessor,
            _nextVaultLib,
            _bypassFailure
        );

        uint256 executableTimestamp = block.timestamp + migrationTimelock;
        vaultProxyToMigrationRequest[_vaultProxy] = MigrationRequest({
            nextFundDeployer: nextFundDeployer,
            nextVaultAccessor: _nextVaultAccessor,
            nextVaultLib: _nextVaultLib,
            executableTimestamp: executableTimestamp
        });

        __invokeMigrationOutHook(
            IMigrationHookHandler.MigrationOutHook.PostSignal,
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            _nextVaultAccessor,
            _nextVaultLib,
            _bypassFailure
        );

        emit MigrationSignaled(
            _vaultProxy,
            prevFundDeployer,
            nextFundDeployer,
            _nextVaultAccessor,
            _nextVaultLib,
            executableTimestamp
        );
    }

    /// @dev Helper to invoke a MigrationInCancelHook on the next FundDeployer being "migrated in" to,
    /// which can optionally be implemented on the FundDeployer
    function __invokeMigrationInCancelHook(
        address _vaultProxy,
        address _prevFundDeployer,
        address _nextFundDeployer,
        address _nextVaultAccessor,
        address _nextVaultLib,
        bool _bypassFailure
    ) private {
        (bool success, bytes memory returnData) = _nextFundDeployer.call(
            abi.encodeWithSelector(
                IMigrationHookHandler.invokeMigrationInCancelHook.selector,
                _vaultProxy,
                _prevFundDeployer,
                _nextVaultAccessor,
                _nextVaultLib
            )
        );
        if (!success) {
            require(
                _bypassFailure,
                string(abi.encodePacked("MigrationOutCancelHook: ", returnData))
            );

            emit MigrationInCancelHookFailed(
                returnData,
                _vaultProxy,
                _prevFundDeployer,
                _nextFundDeployer,
                _nextVaultAccessor,
                _nextVaultLib
            );
        }
    }

    /// @dev Helper to invoke a IMigrationHookHandler.MigrationOutHook on the previous FundDeployer being "migrated out" of,
    /// which can optionally be implemented on the FundDeployer
    function __invokeMigrationOutHook(
        IMigrationHookHandler.MigrationOutHook _hook,
        address _vaultProxy,
        address _prevFundDeployer,
        address _nextFundDeployer,
        address _nextVaultAccessor,
        address _nextVaultLib,
        bool _bypassFailure
    ) private {
        (bool success, bytes memory returnData) = _prevFundDeployer.call(
            abi.encodeWithSelector(
                IMigrationHookHandler.invokeMigrationOutHook.selector,
                _hook,
                _vaultProxy,
                _nextFundDeployer,
                _nextVaultAccessor,
                _nextVaultLib
            )
        );
        if (!success) {
            require(
                _bypassFailure,
                string(abi.encodePacked(__migrationOutHookFailureReasonPrefix(_hook), returnData))
            );

            emit MigrationOutHookFailed(
                returnData,
                _hook,
                _vaultProxy,
                _prevFundDeployer,
                _nextFundDeployer,
                _nextVaultAccessor,
                _nextVaultLib
            );
        }
    }

    /// @dev Helper to return a revert reason string prefix for a given MigrationOutHook
    function __migrationOutHookFailureReasonPrefix(IMigrationHookHandler.MigrationOutHook _hook)
        private
        pure
        returns (string memory failureReasonPrefix_)
    {
        if (_hook == IMigrationHookHandler.MigrationOutHook.PreSignal) {
            return "MigrationOutHook.PreSignal: ";
        }
        if (_hook == IMigrationHookHandler.MigrationOutHook.PostSignal) {
            return "MigrationOutHook.PostSignal: ";
        }
        if (_hook == IMigrationHookHandler.MigrationOutHook.PreMigrate) {
            return "MigrationOutHook.PreMigrate: ";
        }
        if (_hook == IMigrationHookHandler.MigrationOutHook.PostMigrate) {
            return "MigrationOutHook.PostMigrate: ";
        }
        if (_hook == IMigrationHookHandler.MigrationOutHook.PostCancel) {
            return "MigrationOutHook.PostCancel: ";
        }

        return "";
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    // Provides several potentially helpful getters that are not strictly necessary

    /// @notice Gets the current FundDeployer that is allowed to deploy and migrate funds
    /// @return currentFundDeployer_ The current FundDeployer contract address
    function getCurrentFundDeployer()
        external
        view
        override
        returns (address currentFundDeployer_)
    {
        return currentFundDeployer;
    }

    /// @notice Gets the FundDeployer with which a given VaultProxy is associated
    /// @param _vaultProxy The VaultProxy instance
    /// @return fundDeployer_ The FundDeployer contract address
    function getFundDeployerForVaultProxy(address _vaultProxy)
        external
        view
        override
        returns (address fundDeployer_)
    {
        return vaultProxyToFundDeployer[_vaultProxy];
    }

    /// @notice Gets the details of a pending migration request for a given VaultProxy
    /// @param _vaultProxy The VaultProxy instance
    /// @return nextFundDeployer_ The FundDeployer contract address from which the migration
    /// request was made
    /// @return nextVaultAccessor_ The account that will be the next `accessor` on the VaultProxy
    /// @return nextVaultLib_ The next VaultLib library contract address to set on the VaultProxy
    /// @return executableTimestamp_ The timestamp at which the migration request can be executed
    function getMigrationRequestDetailsForVaultProxy(address _vaultProxy)
        external
        view
        override
        returns (
            address nextFundDeployer_,
            address nextVaultAccessor_,
            address nextVaultLib_,
            uint256 executableTimestamp_
        )
    {
        MigrationRequest memory r = vaultProxyToMigrationRequest[_vaultProxy];
        if (r.executableTimestamp > 0) {
            return (
                r.nextFundDeployer,
                r.nextVaultAccessor,
                r.nextVaultLib,
                r.executableTimestamp
            );
        }
    }

    /// @notice Gets the amount of time that must pass between signaling and executing a migration
    /// @return migrationTimelock_ The timelock value (in seconds)
    function getMigrationTimelock() external view override returns (uint256 migrationTimelock_) {
        return migrationTimelock;
    }

    /// @notice Gets the account that is nominated to be the next owner of this contract
    /// @return nominatedOwner_ The account that is nominated to be the owner
    function getNominatedOwner() external view override returns (address nominatedOwner_) {
        return nominatedOwner;
    }

    /// @notice Gets the owner of this contract
    /// @return owner_ The account that is the owner
    function getOwner() external view override returns (address owner_) {
        return owner;
    }

    /// @notice Gets the shares token `symbol` value for use in VaultProxy instances
    /// @return sharesTokenSymbol_ The `symbol` value
    function getSharesTokenSymbol()
        external
        view
        override
        returns (string memory sharesTokenSymbol_)
    {
        return sharesTokenSymbol;
    }

    /// @notice Gets the time remaining until the migration request of a given VaultProxy can be executed
    /// @param _vaultProxy The VaultProxy instance
    /// @return secondsRemaining_ The number of seconds remaining on the timelock
    function getTimelockRemainingForMigrationRequest(address _vaultProxy)
        external
        view
        override
        returns (uint256 secondsRemaining_)
    {
        uint256 executableTimestamp = vaultProxyToMigrationRequest[_vaultProxy]
            .executableTimestamp;
        if (executableTimestamp == 0) {
            return 0;
        }

        if (block.timestamp >= executableTimestamp) {
            return 0;
        }

        return executableTimestamp - block.timestamp;
    }

    /// @notice Checks whether a migration request that is executable exists for a given VaultProxy
    /// @param _vaultProxy The VaultProxy instance
    /// @return hasExecutableRequest_ True if a migration request exists and is executable
    function hasExecutableMigrationRequest(address _vaultProxy)
        external
        view
        override
        returns (bool hasExecutableRequest_)
    {
        uint256 executableTimestamp = vaultProxyToMigrationRequest[_vaultProxy]
            .executableTimestamp;

        return executableTimestamp > 0 && block.timestamp >= executableTimestamp;
    }

    /// @notice Checks whether a migration request exists for a given VaultProxy
    /// @param _vaultProxy The VaultProxy instance
    /// @return hasMigrationRequest_ True if a migration request exists
    function hasMigrationRequest(address _vaultProxy)
        external
        view
        override
        returns (bool hasMigrationRequest_)
    {
        return vaultProxyToMigrationRequest[_vaultProxy].executableTimestamp > 0;
    }
}

File 118 of 138 : MockVaultLib.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../persistent/vault/VaultLibBaseCore.sol";

/// @title MockVaultLib Contract
/// @author Enzyme Council <[email protected]>
/// @notice A mock VaultLib implementation that only extends VaultLibBaseCore
contract MockVaultLib is VaultLibBaseCore {
    function getAccessor() external view returns (address) {
        return accessor;
    }

    function getCreator() external view returns (address) {
        return creator;
    }

    function getMigrator() external view returns (address) {
        return migrator;
    }

    function getOwner() external view returns (address) {
        return owner;
    }
}

File 119 of 138 : ICERC20.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity ^0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/// @title ICERC20 Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for interactions with Compound tokens (cTokens)
interface ICERC20 is IERC20 {
    function decimals() external view returns (uint8);

    function mint(uint256) external returns (uint256);

    function redeem(uint256) external returns (uint256);

    function exchangeRateStored() external view returns (uint256);

    function underlying() external returns (address);
}

File 120 of 138 : CompoundPriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/ICERC20.sol";
import "../../../utils/DispatcherOwnerMixin.sol";
import "../IDerivativePriceFeed.sol";

/// @title CompoundPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Compound Tokens (cTokens)
contract CompoundPriceFeed is IDerivativePriceFeed, DispatcherOwnerMixin {
    using SafeMath for uint256;

    event CTokenAdded(address indexed cToken, address indexed token);

    uint256 private constant CTOKEN_RATE_DIVISOR = 10**18;

    mapping(address => address) private cTokenToToken;

    constructor(
        address _dispatcher,
        address _weth,
        address _ceth,
        address[] memory cERC20Tokens
    ) public DispatcherOwnerMixin(_dispatcher) {
        // Set cEth
        cTokenToToken[_ceth] = _weth;
        emit CTokenAdded(_ceth, _weth);

        // Set any other cTokens
        if (cERC20Tokens.length > 0) {
            __addCERC20Tokens(cERC20Tokens);
        }
    }

    /// @notice Converts a given amount of a derivative to its underlying asset values
    /// @param _derivative The derivative to convert
    /// @param _derivativeAmount The amount of the derivative to convert
    /// @return underlyings_ The underlying assets for the _derivative
    /// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
    function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
        external
        override
        returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
    {
        underlyings_ = new address[](1);
        underlyings_[0] = cTokenToToken[_derivative];
        require(underlyings_[0] != address(0), "calcUnderlyingValues: Unsupported derivative");

        underlyingAmounts_ = new uint256[](1);
        // Returns a rate scaled to 10^18
        underlyingAmounts_[0] = _derivativeAmount
            .mul(ICERC20(_derivative).exchangeRateStored())
            .div(CTOKEN_RATE_DIVISOR);

        return (underlyings_, underlyingAmounts_);
    }

    /// @notice Checks if an asset is supported by the price feed
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is supported
    function isSupportedAsset(address _asset) external view override returns (bool isSupported_) {
        return cTokenToToken[_asset] != address(0);
    }

    //////////////////////
    // CTOKENS REGISTRY //
    //////////////////////

    /// @notice Adds cTokens to the price feed
    /// @param _cTokens cTokens to add
    /// @dev Only allows CERC20 tokens. CEther is set in the constructor.
    function addCTokens(address[] calldata _cTokens) external onlyDispatcherOwner {
        __addCERC20Tokens(_cTokens);
    }

    /// @dev Helper to add cTokens
    function __addCERC20Tokens(address[] memory _cTokens) private {
        require(_cTokens.length > 0, "__addCTokens: Empty _cTokens");

        for (uint256 i; i < _cTokens.length; i++) {
            require(cTokenToToken[_cTokens[i]] == address(0), "__addCTokens: Value already set");

            address token = ICERC20(_cTokens[i]).underlying();
            cTokenToToken[_cTokens[i]] = token;

            emit CTokenAdded(_cTokens[i], token);
        }
    }

    ////////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Returns the underlying asset of a given cToken
    /// @param _cToken The cToken for which to get the underlying asset
    /// @return token_ The underlying token
    function getTokenFromCToken(address _cToken) public view returns (address token_) {
        return cTokenToToken[_cToken];
    }
}

File 121 of 138 : CompoundAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../../infrastructure/price-feeds/derivatives/feeds/CompoundPriceFeed.sol";
import "../../../../interfaces/ICERC20.sol";
import "../../../../interfaces/ICEther.sol";
import "../../../../interfaces/IWETH.sol";
import "../utils/AdapterBase.sol";

/// @title CompoundAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for Compound <https://compound.finance/>
contract CompoundAdapter is AdapterBase {
    address private immutable COMPOUND_PRICE_FEED;
    address private immutable WETH_TOKEN;

    constructor(
        address _integrationManager,
        address _compoundPriceFeed,
        address _wethToken
    ) public AdapterBase(_integrationManager) {
        COMPOUND_PRICE_FEED = _compoundPriceFeed;
        WETH_TOKEN = _wethToken;
    }

    /// @dev Needed to receive ETH during cEther lend/redeem
    receive() external payable {}

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ An identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "COMPOUND";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        if (_selector == LEND_SELECTOR) {
            (address cToken, uint256 tokenAmount, uint256 minCTokenAmount) = __decodeCallArgs(
                _encodedCallArgs
            );
            address token = CompoundPriceFeed(COMPOUND_PRICE_FEED).getTokenFromCToken(cToken);
            require(token != address(0), "parseAssetsForMethod: Unsupported cToken");

            spendAssets_ = new address[](1);
            spendAssets_[0] = token;
            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = tokenAmount;

            incomingAssets_ = new address[](1);
            incomingAssets_[0] = cToken;
            minIncomingAssetAmounts_ = new uint256[](1);
            minIncomingAssetAmounts_[0] = minCTokenAmount;
        } else if (_selector == REDEEM_SELECTOR) {
            (address cToken, uint256 cTokenAmount, uint256 minTokenAmount) = __decodeCallArgs(
                _encodedCallArgs
            );
            address token = CompoundPriceFeed(COMPOUND_PRICE_FEED).getTokenFromCToken(cToken);
            require(token != address(0), "parseAssetsForMethod: Unsupported cToken");

            spendAssets_ = new address[](1);
            spendAssets_[0] = cToken;
            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = cTokenAmount;

            incomingAssets_ = new address[](1);
            incomingAssets_[0] = token;
            minIncomingAssetAmounts_ = new uint256[](1);
            minIncomingAssetAmounts_[0] = minTokenAmount;
        } else {
            revert("parseAssetsForMethod: _selector invalid");
        }

        return (
            IIntegrationManager.SpendAssetsHandleType.Transfer,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @notice Lends an amount of a token to Compound
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function lend(
        address _vaultProxy,
        bytes calldata,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        // More efficient to parse all from _encodedAssetTransferArgs
        (
            ,
            address[] memory spendAssets,
            uint256[] memory spendAssetAmounts,
            address[] memory incomingAssets
        ) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);

        if (spendAssets[0] == WETH_TOKEN) {
            IWETH(WETH_TOKEN).withdraw(spendAssetAmounts[0]);
            ICEther(incomingAssets[0]).mint{value: spendAssetAmounts[0]}();
        } else {
            __approveMaxAsNeeded(spendAssets[0], incomingAssets[0], spendAssetAmounts[0]);
            ICERC20(incomingAssets[0]).mint(spendAssetAmounts[0]);
        }
    }

    /// @notice Redeems an amount of cTokens from Compound
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function redeem(
        address _vaultProxy,
        bytes calldata,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        // More efficient to parse all from _encodedAssetTransferArgs
        (
            ,
            address[] memory spendAssets,
            uint256[] memory spendAssetAmounts,
            address[] memory incomingAssets
        ) = __decodeEncodedAssetTransferArgs(_encodedAssetTransferArgs);

        ICERC20(spendAssets[0]).redeem(spendAssetAmounts[0]);

        if (incomingAssets[0] == WETH_TOKEN) {
            IWETH(payable(WETH_TOKEN)).deposit{value: payable(address(this)).balance}();
        }
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to decode callArgs for lend and redeem
    function __decodeCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (
            address cToken_,
            uint256 outgoingAssetAmount_,
            uint256 minIncomingAssetAmount_
        )
    {
        return abi.decode(_encodedCallArgs, (address, uint256, uint256));
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `COMPOUND_PRICE_FEED` variable
    /// @return compoundPriceFeed_ The `COMPOUND_PRICE_FEED` variable value
    function getCompoundPriceFeed() external view returns (address compoundPriceFeed_) {
        return COMPOUND_PRICE_FEED;
    }

    /// @notice Gets the `WETH_TOKEN` variable
    /// @return wethToken_ The `WETH_TOKEN` variable value
    function getWethToken() external view returns (address wethToken_) {
        return WETH_TOKEN;
    }
}

File 122 of 138 : ICEther.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity ^0.6.12;

/// @title ICEther Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for interactions with Compound Ether
interface ICEther {
    function mint() external payable;
}

File 123 of 138 : IChai.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/// @title IChai Interface
/// @author Enzyme Council <[email protected]>
/// @notice Minimal interface for our interactions with the Chai contract
interface IChai is IERC20 {
    function exit(address, uint256) external;

    function join(address, uint256) external;
}

File 124 of 138 : ChaiAdapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../../../interfaces/IChai.sol";
import "../utils/AdapterBase.sol";

/// @title ChaiAdapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for Chai <https://github.com/dapphub/chai>
contract ChaiAdapter is AdapterBase {
    address private immutable CHAI;
    address private immutable DAI;

    constructor(
        address _integrationManager,
        address _chai,
        address _dai
    ) public AdapterBase(_integrationManager) {
        CHAI = _chai;
        DAI = _dai;
    }

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ An identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "CHAI";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        if (_selector == LEND_SELECTOR) {
            (uint256 daiAmount, uint256 minChaiAmount) = __decodeCallArgs(_encodedCallArgs);

            spendAssets_ = new address[](1);
            spendAssets_[0] = DAI;
            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = daiAmount;

            incomingAssets_ = new address[](1);
            incomingAssets_[0] = CHAI;
            minIncomingAssetAmounts_ = new uint256[](1);
            minIncomingAssetAmounts_[0] = minChaiAmount;
        } else if (_selector == REDEEM_SELECTOR) {
            (uint256 chaiAmount, uint256 minDaiAmount) = __decodeCallArgs(_encodedCallArgs);

            spendAssets_ = new address[](1);
            spendAssets_[0] = CHAI;
            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = chaiAmount;

            incomingAssets_ = new address[](1);
            incomingAssets_[0] = DAI;
            minIncomingAssetAmounts_ = new uint256[](1);
            minIncomingAssetAmounts_[0] = minDaiAmount;
        } else {
            revert("parseAssetsForMethod: _selector invalid");
        }

        return (
            IIntegrationManager.SpendAssetsHandleType.Transfer,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @notice Lend Dai for Chai
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function lend(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        (uint256 daiAmount, ) = __decodeCallArgs(_encodedCallArgs);

        __approveMaxAsNeeded(DAI, CHAI, daiAmount);

        // Execute Lend on Chai
        // Chai.join allows specifying the vaultProxy as the destination of Chai tokens
        IChai(CHAI).join(_vaultProxy, daiAmount);
    }

    /// @notice Redeem Chai for Dai
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function redeem(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        (uint256 chaiAmount, ) = __decodeCallArgs(_encodedCallArgs);

        // Execute redeem on Chai
        // Chai.exit sends Dai back to the adapter
        IChai(CHAI).exit(address(this), chaiAmount);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to decode the encoded call arguments
    function __decodeCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (uint256 outgoingAmount_, uint256 minIncomingAmount_)
    {
        return abi.decode(_encodedCallArgs, (uint256, uint256));
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `CHAI` variable value
    /// @return chai_ The `CHAI` variable value
    function getChai() external view returns (address chai_) {
        return CHAI;
    }

    /// @notice Gets the `DAI` variable value
    /// @return dai_ The `DAI` variable value
    function getDai() external view returns (address dai_) {
        return DAI;
    }
}

File 125 of 138 : MockCTokenBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC20/ERC20Burnable.sol";
import "../../prices/CentralizedRateProvider.sol";
import "../../utils/SwapperBase.sol";

contract MockCTokenBase is ERC20, SwapperBase, Ownable {
    address internal immutable TOKEN;
    address internal immutable CENTRALIZED_RATE_PROVIDER;

    uint256 internal rate;

    mapping(address => mapping(address => uint256)) internal _allowances;

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals,
        address _token,
        address _centralizedRateProvider,
        uint256 _initialRate
    ) public ERC20(_name, _symbol) {
        _setupDecimals(_decimals);
        TOKEN = _token;
        CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
        rate = _initialRate;
    }

    function approve(address _spender, uint256 _amount) public virtual override returns (bool) {
        _allowances[msg.sender][_spender] = _amount;
        return true;
    }

    /// @dev Overriden `allowance` function, give the integratee infinite approval by default
    function allowance(address _owner, address _spender) public view override returns (uint256) {
        if (_spender == address(this) || _owner == _spender) {
            return 2**256 - 1;
        } else {
            return _allowances[_owner][_spender];
        }
    }

    /// @dev Necessary as this contract doesn't directly inherit from MockToken
    function mintFor(address _who, uint256 _amount) external onlyOwner {
        _mint(_who, _amount);
    }

    /// @dev Necessary to allow updates on persistent deployments (e.g Kovan)
    function setRate(uint256 _rate) public onlyOwner {
        rate = _rate;
    }

    function transferFrom(
        address _sender,
        address _recipient,
        uint256 _amount
    ) public virtual override returns (bool) {
        _transfer(_sender, _recipient, _amount);
        return true;
    }

    // INTERNAL FUNCTIONS

    /// @dev Calculates the cTokenAmount given a tokenAmount
    /// Makes use of a inverse rate with the CentralizedRateProvider as a derivative can't be used as quoteAsset
    function __calcCTokenAmount(uint256 _tokenAmount) internal returns (uint256 cTokenAmount_) {
        uint256 tokenDecimals = ERC20(TOKEN).decimals();
        uint256 cTokenDecimals = decimals();

        // Result in Token Decimals
        uint256 tokenPerCTokenUnit = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValue(address(this), 10**uint256(cTokenDecimals), TOKEN);

        // Result in cToken decimals
        uint256 inverseRate = uint256(10**tokenDecimals).mul(10**uint256(cTokenDecimals)).div(
            tokenPerCTokenUnit
        );

        // Amount in token decimals, result in cToken decimals
        cTokenAmount_ = _tokenAmount.mul(inverseRate).div(10**tokenDecimals);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @dev Part of ICERC20 token interface
    function underlying() public view returns (address) {
        return TOKEN;
    }

    /// @dev Part of ICERC20 token interface.
    /// Called from CompoundPriceFeed, returns the actual Rate cToken/Token
    function exchangeRateStored() public view returns (uint256) {
        return rate;
    }

    function getCentralizedRateProvider() public view returns (address) {
        return CENTRALIZED_RATE_PROVIDER;
    }
}

File 126 of 138 : MockCTokenIntegratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./MockCTokenBase.sol";

contract MockCTokenIntegratee is MockCTokenBase {
    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals,
        address _token,
        address _centralizedRateProvider,
        uint256 _initialRate
    )
        public
        MockCTokenBase(_name, _symbol, _decimals, _token, _centralizedRateProvider, _initialRate)
    {}

    function mint(uint256 _amount) external returns (uint256) {
        uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
            TOKEN,
            _amount,
            address(this)
        );

        __swapAssets(msg.sender, TOKEN, _amount, address(this), destAmount);
        return _amount;
    }

    function redeem(uint256 _amount) external returns (uint256) {
        uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
            address(this),
            _amount,
            TOKEN
        );
        __swapAssets(msg.sender, address(this), _amount, TOKEN, destAmount);
        return _amount;
    }
}

File 127 of 138 : MockCEtherIntegratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./MockCTokenBase.sol";

contract MockCEtherIntegratee is MockCTokenBase {
    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals,
        address _weth,
        address _centralizedRateProvider,
        uint256 _initialRate
    )
        public
        MockCTokenBase(_name, _symbol, _decimals, _weth, _centralizedRateProvider, _initialRate)
    {}

    function mint() external payable {
        uint256 amount = msg.value;
        uint256 destAmount = __calcCTokenAmount(amount);
        __swapAssets(msg.sender, ETH_ADDRESS, amount, address(this), destAmount);
    }

    function redeem(uint256 _amount) external returns (uint256) {
        uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
            address(this),
            _amount,
            TOKEN
        );
        __swapAssets(msg.sender, address(this), _amount, ETH_ADDRESS, destAmount);
        return _amount;
    }
}

File 128 of 138 : MockChaiIntegratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../prices/CentralizedRateProvider.sol";
import "../tokens/MockToken.sol";
import "../utils/SwapperBase.sol";

contract MockChaiIntegratee is MockToken, SwapperBase {
    address private immutable CENTRALIZED_RATE_PROVIDER;
    address public immutable DAI;

    constructor(
        address _dai,
        address _centralizedRateProvider,
        uint8 _decimals
    ) public MockToken("Chai", "CHAI", _decimals) {
        _setupDecimals(_decimals);
        CENTRALIZED_RATE_PROVIDER = _centralizedRateProvider;
        DAI = _dai;
    }

    function join(address, uint256 _daiAmount) external {
        uint256 tokenDecimals = ERC20(DAI).decimals();
        uint256 chaiDecimals = decimals();

        // Calculate the amount of tokens per one unit of DAI
        uint256 daiPerChaiUnit = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER)
            .calcLiveAssetValue(address(this), 10**uint256(chaiDecimals), DAI);

        // Calculate the inverse rate to know the amount of CHAI to return from a unit of DAI
        uint256 inverseRate = uint256(10**tokenDecimals).mul(10**uint256(chaiDecimals)).div(
            daiPerChaiUnit
        );
        // Mint and send those CHAI to sender
        uint256 destAmount = _daiAmount.mul(inverseRate).div(10**tokenDecimals);
        _mint(address(this), destAmount);
        __swapAssets(msg.sender, DAI, _daiAmount, address(this), destAmount);
    }

    function exit(address payable _trader, uint256 _chaiAmount) external {
        uint256 destAmount = CentralizedRateProvider(CENTRALIZED_RATE_PROVIDER).calcLiveAssetValue(
            address(this),
            _chaiAmount,
            DAI
        );
        // Burn CHAI of the trader.
        _burn(_trader, _chaiAmount);
        // Release DAI to the trader.
        ERC20(DAI).transfer(msg.sender, destAmount);
    }
}

File 129 of 138 : UniswapV2Adapter.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IUniswapV2Factory.sol";
import "../../../../interfaces/IUniswapV2Router2.sol";
import "../utils/AdapterBase.sol";

/// @title UniswapV2Adapter Contract
/// @author Enzyme Council <[email protected]>
/// @notice Adapter for interacting with Uniswap v2
contract UniswapV2Adapter is AdapterBase {
    using SafeMath for uint256;

    address private immutable FACTORY;
    address private immutable ROUTER;

    constructor(
        address _integrationManager,
        address _router,
        address _factory
    ) public AdapterBase(_integrationManager) {
        FACTORY = _factory;
        ROUTER = _router;
    }

    // EXTERNAL FUNCTIONS

    /// @notice Provides a constant string identifier for an adapter
    /// @return identifier_ The identifer string
    function identifier() external pure override returns (string memory identifier_) {
        return "UNISWAP_V2";
    }

    /// @notice Parses the expected assets to receive from a call on integration
    /// @param _selector The function selector for the callOnIntegration
    /// @param _encodedCallArgs The encoded parameters for the callOnIntegration
    /// @return spendAssetsHandleType_ A type that dictates how to handle granting
    /// the adapter access to spend assets (`None` by default)
    /// @return spendAssets_ The assets to spend in the call
    /// @return spendAssetAmounts_ The max asset amounts to spend in the call
    /// @return incomingAssets_ The assets to receive in the call
    /// @return minIncomingAssetAmounts_ The min asset amounts to receive in the call
    function parseAssetsForMethod(bytes4 _selector, bytes calldata _encodedCallArgs)
        external
        view
        override
        returns (
            IIntegrationManager.SpendAssetsHandleType spendAssetsHandleType_,
            address[] memory spendAssets_,
            uint256[] memory spendAssetAmounts_,
            address[] memory incomingAssets_,
            uint256[] memory minIncomingAssetAmounts_
        )
    {
        if (_selector == LEND_SELECTOR) {
            (
                address[2] memory outgoingAssets,
                uint256[2] memory maxOutgoingAssetAmounts,
                ,
                uint256 minIncomingAssetAmount
            ) = __decodeLendCallArgs(_encodedCallArgs);

            spendAssets_ = new address[](2);
            spendAssets_[0] = outgoingAssets[0];
            spendAssets_[1] = outgoingAssets[1];

            spendAssetAmounts_ = new uint256[](2);
            spendAssetAmounts_[0] = maxOutgoingAssetAmounts[0];
            spendAssetAmounts_[1] = maxOutgoingAssetAmounts[1];

            incomingAssets_ = new address[](1);
            // No need to validate not address(0), this will be caught in IntegrationManager
            incomingAssets_[0] = IUniswapV2Factory(FACTORY).getPair(
                outgoingAssets[0],
                outgoingAssets[1]
            );

            minIncomingAssetAmounts_ = new uint256[](1);
            minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
        } else if (_selector == REDEEM_SELECTOR) {
            (
                uint256 outgoingAssetAmount,
                address[2] memory incomingAssets,
                uint256[2] memory minIncomingAssetAmounts
            ) = __decodeRedeemCallArgs(_encodedCallArgs);

            spendAssets_ = new address[](1);
            // No need to validate not address(0), this will be caught in IntegrationManager
            spendAssets_[0] = IUniswapV2Factory(FACTORY).getPair(
                incomingAssets[0],
                incomingAssets[1]
            );

            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = outgoingAssetAmount;

            incomingAssets_ = new address[](2);
            incomingAssets_[0] = incomingAssets[0];
            incomingAssets_[1] = incomingAssets[1];

            minIncomingAssetAmounts_ = new uint256[](2);
            minIncomingAssetAmounts_[0] = minIncomingAssetAmounts[0];
            minIncomingAssetAmounts_[1] = minIncomingAssetAmounts[1];
        } else if (_selector == TAKE_ORDER_SELECTOR) {
            (
                address[] memory path,
                uint256 outgoingAssetAmount,
                uint256 minIncomingAssetAmount
            ) = __decodeTakeOrderCallArgs(_encodedCallArgs);

            require(path.length >= 2, "parseAssetsForMethod: _path must be >= 2");

            spendAssets_ = new address[](1);
            spendAssets_[0] = path[0];
            spendAssetAmounts_ = new uint256[](1);
            spendAssetAmounts_[0] = outgoingAssetAmount;

            incomingAssets_ = new address[](1);
            incomingAssets_[0] = path[path.length - 1];
            minIncomingAssetAmounts_ = new uint256[](1);
            minIncomingAssetAmounts_[0] = minIncomingAssetAmount;
        } else {
            revert("parseAssetsForMethod: _selector invalid");
        }

        return (
            IIntegrationManager.SpendAssetsHandleType.Transfer,
            spendAssets_,
            spendAssetAmounts_,
            incomingAssets_,
            minIncomingAssetAmounts_
        );
    }

    /// @notice Lends assets for pool tokens on Uniswap
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function lend(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        (
            address[2] memory outgoingAssets,
            uint256[2] memory maxOutgoingAssetAmounts,
            uint256[2] memory minOutgoingAssetAmounts,

        ) = __decodeLendCallArgs(_encodedCallArgs);

        __lend(
            _vaultProxy,
            outgoingAssets[0],
            outgoingAssets[1],
            maxOutgoingAssetAmounts[0],
            maxOutgoingAssetAmounts[1],
            minOutgoingAssetAmounts[0],
            minOutgoingAssetAmounts[1]
        );
    }

    /// @notice Redeems pool tokens on Uniswap
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function redeem(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        (
            uint256 outgoingAssetAmount,
            address[2] memory incomingAssets,
            uint256[2] memory minIncomingAssetAmounts
        ) = __decodeRedeemCallArgs(_encodedCallArgs);

        // More efficient to parse pool token from _encodedAssetTransferArgs than external call
        (, address[] memory spendAssets, , ) = __decodeEncodedAssetTransferArgs(
            _encodedAssetTransferArgs
        );

        __redeem(
            _vaultProxy,
            spendAssets[0],
            outgoingAssetAmount,
            incomingAssets[0],
            incomingAssets[1],
            minIncomingAssetAmounts[0],
            minIncomingAssetAmounts[1]
        );
    }

    /// @notice Trades assets on Uniswap
    /// @param _vaultProxy The VaultProxy of the calling fund
    /// @param _encodedCallArgs Encoded order parameters
    /// @param _encodedAssetTransferArgs Encoded args for expected assets to spend and receive
    function takeOrder(
        address _vaultProxy,
        bytes calldata _encodedCallArgs,
        bytes calldata _encodedAssetTransferArgs
    )
        external
        onlyIntegrationManager
        fundAssetsTransferHandler(_vaultProxy, _encodedAssetTransferArgs)
    {
        (
            address[] memory path,
            uint256 outgoingAssetAmount,
            uint256 minIncomingAssetAmount
        ) = __decodeTakeOrderCallArgs(_encodedCallArgs);

        __takeOrder(_vaultProxy, outgoingAssetAmount, minIncomingAssetAmount, path);
    }

    // PRIVATE FUNCTIONS

    /// @dev Helper to decode the lend encoded call arguments
    function __decodeLendCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (
            address[2] memory outgoingAssets_,
            uint256[2] memory maxOutgoingAssetAmounts_,
            uint256[2] memory minOutgoingAssetAmounts_,
            uint256 minIncomingAssetAmount_
        )
    {
        return abi.decode(_encodedCallArgs, (address[2], uint256[2], uint256[2], uint256));
    }

    /// @dev Helper to decode the redeem encoded call arguments
    function __decodeRedeemCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (
            uint256 outgoingAssetAmount_,
            address[2] memory incomingAssets_,
            uint256[2] memory minIncomingAssetAmounts_
        )
    {
        return abi.decode(_encodedCallArgs, (uint256, address[2], uint256[2]));
    }

    /// @dev Helper to decode the take order encoded call arguments
    function __decodeTakeOrderCallArgs(bytes memory _encodedCallArgs)
        private
        pure
        returns (
            address[] memory path_,
            uint256 outgoingAssetAmount_,
            uint256 minIncomingAssetAmount_
        )
    {
        return abi.decode(_encodedCallArgs, (address[], uint256, uint256));
    }

    /// @dev Helper to execute lend. Avoids stack-too-deep error.
    function __lend(
        address _vaultProxy,
        address _tokenA,
        address _tokenB,
        uint256 _amountADesired,
        uint256 _amountBDesired,
        uint256 _amountAMin,
        uint256 _amountBMin
    ) private {
        __approveMaxAsNeeded(_tokenA, ROUTER, _amountADesired);
        __approveMaxAsNeeded(_tokenB, ROUTER, _amountBDesired);

        // Execute lend on Uniswap
        IUniswapV2Router2(ROUTER).addLiquidity(
            _tokenA,
            _tokenB,
            _amountADesired,
            _amountBDesired,
            _amountAMin,
            _amountBMin,
            _vaultProxy,
            block.timestamp.add(1)
        );
    }

    /// @dev Helper to execute redeem. Avoids stack-too-deep error.
    function __redeem(
        address _vaultProxy,
        address _poolToken,
        uint256 _poolTokenAmount,
        address _tokenA,
        address _tokenB,
        uint256 _amountAMin,
        uint256 _amountBMin
    ) private {
        __approveMaxAsNeeded(_poolToken, ROUTER, _poolTokenAmount);

        // Execute redeem on Uniswap
        IUniswapV2Router2(ROUTER).removeLiquidity(
            _tokenA,
            _tokenB,
            _poolTokenAmount,
            _amountAMin,
            _amountBMin,
            _vaultProxy,
            block.timestamp.add(1)
        );
    }

    /// @dev Helper to execute takeOrder. Avoids stack-too-deep error.
    function __takeOrder(
        address _vaultProxy,
        uint256 _outgoingAssetAmount,
        uint256 _minIncomingAssetAmount,
        address[] memory _path
    ) private {
        __approveMaxAsNeeded(_path[0], ROUTER, _outgoingAssetAmount);

        // Execute fill
        IUniswapV2Router2(ROUTER).swapExactTokensForTokens(
            _outgoingAssetAmount,
            _minIncomingAssetAmount,
            _path,
            _vaultProxy,
            block.timestamp.add(1)
        );
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `FACTORY` variable
    /// @return factory_ The `FACTORY` variable value
    function getFactory() external view returns (address factory_) {
        return FACTORY;
    }

    /// @notice Gets the `ROUTER` variable
    /// @return router_ The `ROUTER` variable value
    function getRouter() external view returns (address router_) {
        return ROUTER;
    }
}

File 130 of 138 : IUniswapV2Router2.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @title UniswapV2Router2 Interface
/// @author Enzyme Council <[email protected]>
/// @dev Minimal interface for our interactions with Uniswap V2's Router2
interface IUniswapV2Router2 {
    function addLiquidity(
        address,
        address,
        uint256,
        uint256,
        uint256,
        uint256,
        address,
        uint256
    )
        external
        returns (
            uint256,
            uint256,
            uint256
        );

    function removeLiquidity(
        address,
        address,
        uint256,
        uint256,
        uint256,
        address,
        uint256
    ) external returns (uint256, uint256);

    function swapExactTokensForTokens(
        uint256,
        uint256,
        address[] calldata,
        address,
        uint256
    ) external returns (uint256[] memory);
}

File 131 of 138 : ChaiPriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "../../../../interfaces/IMakerDaoPot.sol";
import "../IDerivativePriceFeed.sol";

/// @title ChaiPriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Price source oracle for Chai
contract ChaiPriceFeed is IDerivativePriceFeed {
    using SafeMath for uint256;

    uint256 private constant CHI_DIVISOR = 10**27;
    address private immutable CHAI;
    address private immutable DAI;
    address private immutable DSR_POT;

    constructor(
        address _chai,
        address _dai,
        address _dsrPot
    ) public {
        CHAI = _chai;
        DAI = _dai;
        DSR_POT = _dsrPot;
    }

    /// @notice Converts a given amount of a derivative to its underlying asset values
    /// @param _derivative The derivative to convert
    /// @param _derivativeAmount The amount of the derivative to convert
    /// @return underlyings_ The underlying assets for the _derivative
    /// @return underlyingAmounts_ The amount of each underlying asset for the equivalent derivative amount
    /// @dev Calculation based on Chai source: https://github.com/dapphub/chai/blob/master/src/chai.sol
    function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
        external
        override
        returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
    {
        require(isSupportedAsset(_derivative), "calcUnderlyingValues: Only Chai is supported");

        underlyings_ = new address[](1);
        underlyings_[0] = DAI;
        underlyingAmounts_ = new uint256[](1);
        underlyingAmounts_[0] = _derivativeAmount.mul(IMakerDaoPot(DSR_POT).chi()).div(
            CHI_DIVISOR
        );
    }

    /// @notice Checks if an asset is supported by the price feed
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is supported
    function isSupportedAsset(address _asset) public view override returns (bool isSupported_) {
        return _asset == CHAI;
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `CHAI` variable value
    /// @return chai_ The `CHAI` variable value
    function getChai() external view returns (address chai_) {
        return CHAI;
    }

    /// @notice Gets the `DAI` variable value
    /// @return dai_ The `DAI` variable value
    function getDai() external view returns (address dai_) {
        return DAI;
    }

    /// @notice Gets the `DSR_POT` variable value
    /// @return dsrPot_ The `DSR_POT` variable value
    function getDsrPot() external view returns (address dsrPot_) {
        return DSR_POT;
    }
}

File 132 of 138 : IMakerDaoPot.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

/// @notice Limited interface for Maker DSR's Pot contract
/// @dev See DSR integration guide: https://github.com/makerdao/developerguides/blob/master/dai/dsr-integration-guide/dsr-integration-guide-01.md
interface IMakerDaoPot {
    function chi() external view returns (uint256);

    function rho() external view returns (uint256);

    function drip() external returns (uint256);
}

File 133 of 138 : EntranceRateFeeBase.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";
import "./FeeBase.sol";

/// @title EntranceRateFeeBase Contract
/// @author Enzyme Council <[email protected]>
/// @notice Calculates a fee based on a rate to be charged to an investor upon entering a fund
abstract contract EntranceRateFeeBase is FeeBase {
    using SafeMath for uint256;

    event FundSettingsAdded(address indexed comptrollerProxy, uint256 rate);

    event Settled(address indexed comptrollerProxy, address indexed payer, uint256 sharesQuantity);

    uint256 private constant RATE_DIVISOR = 10**18;
    IFeeManager.SettlementType private immutable SETTLEMENT_TYPE;

    mapping(address => uint256) private comptrollerProxyToRate;

    constructor(address _feeManager, IFeeManager.SettlementType _settlementType)
        public
        FeeBase(_feeManager)
    {
        require(
            _settlementType == IFeeManager.SettlementType.Burn ||
                _settlementType == IFeeManager.SettlementType.Direct,
            "constructor: Invalid _settlementType"
        );
        SETTLEMENT_TYPE = _settlementType;
    }

    // EXTERNAL FUNCTIONS

    /// @notice Add the fee settings for a fund
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _settingsData Encoded settings to apply to the policy for a fund
    function addFundSettings(address _comptrollerProxy, bytes calldata _settingsData)
        external
        override
        onlyFeeManager
    {
        uint256 rate = abi.decode(_settingsData, (uint256));
        require(rate > 0, "addFundSettings: Fee rate must be >0");

        comptrollerProxyToRate[_comptrollerProxy] = rate;

        emit FundSettingsAdded(_comptrollerProxy, rate);
    }

    /// @notice Gets the hooks that are implemented by the fee
    /// @return implementedHooksForSettle_ The hooks during which settle() is implemented
    /// @return implementedHooksForUpdate_ The hooks during which update() is implemented
    /// @return usesGavOnSettle_ True if GAV is used during the settle() implementation
    /// @return usesGavOnUpdate_ True if GAV is used during the update() implementation
    /// @dev Used only during fee registration
    function implementedHooks()
        external
        view
        override
        returns (
            IFeeManager.FeeHook[] memory implementedHooksForSettle_,
            IFeeManager.FeeHook[] memory implementedHooksForUpdate_,
            bool usesGavOnSettle_,
            bool usesGavOnUpdate_
        )
    {
        implementedHooksForSettle_ = new IFeeManager.FeeHook[](1);
        implementedHooksForSettle_[0] = IFeeManager.FeeHook.PostBuyShares;

        return (implementedHooksForSettle_, new IFeeManager.FeeHook[](0), false, false);
    }

    /// @notice Settles the fee
    /// @param _comptrollerProxy The ComptrollerProxy of the fund
    /// @param _settlementData Encoded args to use in calculating the settlement
    /// @return settlementType_ The type of settlement
    /// @return payer_ The payer of shares due
    /// @return sharesDue_ The amount of shares due
    function settle(
        address _comptrollerProxy,
        address,
        IFeeManager.FeeHook,
        bytes calldata _settlementData,
        uint256
    )
        external
        override
        onlyFeeManager
        returns (
            IFeeManager.SettlementType settlementType_,
            address payer_,
            uint256 sharesDue_
        )
    {
        uint256 sharesBought;
        (payer_, , sharesBought) = __decodePostBuySharesSettlementData(_settlementData);

        uint256 rate = comptrollerProxyToRate[_comptrollerProxy];
        sharesDue_ = sharesBought.mul(rate).div(RATE_DIVISOR.add(rate));

        if (sharesDue_ == 0) {
            return (IFeeManager.SettlementType.None, address(0), 0);
        }

        emit Settled(_comptrollerProxy, payer_, sharesDue_);

        return (SETTLEMENT_TYPE, payer_, sharesDue_);
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the `rate` variable for a fund
    /// @param _comptrollerProxy The ComptrollerProxy contract for the fund
    /// @return rate_ The `rate` variable value
    function getRateForFund(address _comptrollerProxy) external view returns (uint256 rate_) {
        return comptrollerProxyToRate[_comptrollerProxy];
    }

    /// @notice Gets the `SETTLEMENT_TYPE` variable
    /// @return settlementType_ The `SETTLEMENT_TYPE` variable value
    function getSettlementType()
        external
        view
        returns (IFeeManager.SettlementType settlementType_)
    {
        return SETTLEMENT_TYPE;
    }
}

File 134 of 138 : EntranceRateDirectFee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./utils/EntranceRateFeeBase.sol";

/// @title EntranceRateDirectFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice An EntranceRateFee that transfers the fee shares to the fund manager
contract EntranceRateDirectFee is EntranceRateFeeBase {
    constructor(address _feeManager)
        public
        EntranceRateFeeBase(_feeManager, IFeeManager.SettlementType.Direct)
    {}

    /// @notice Provides a constant string identifier for a fee
    /// @return identifier_ The identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "ENTRANCE_RATE_DIRECT";
    }
}

File 135 of 138 : EntranceRateBurnFee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "./utils/EntranceRateFeeBase.sol";

/// @title EntranceRateBurnFee Contract
/// @author Enzyme Council <[email protected]>
/// @notice An EntranceRateFee that burns the fee shares
contract EntranceRateBurnFee is EntranceRateFeeBase {
    constructor(address _feeManager)
        public
        EntranceRateFeeBase(_feeManager, IFeeManager.SettlementType.Burn)
    {}

    /// @notice Provides a constant string identifier for a fee
    /// @return identifier_ The identifier string
    function identifier() external pure override returns (string memory identifier_) {
        return "ENTRANCE_RATE_BURN";
    }
}

File 136 of 138 : MockChaiPriceSource.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "@openzeppelin/contracts/math/SafeMath.sol";

contract MockChaiPriceSource {
    using SafeMath for uint256;

    uint256 private chiStored = 10**27;
    uint256 private rhoStored = now;

    function drip() external returns (uint256) {
        require(now >= rhoStored, "drip: invalid now");
        rhoStored = now;
        chiStored = chiStored.mul(99).div(100);
        return chi();
    }

    ////////////////////
    // STATE GETTERS //
    ///////////////////

    function chi() public view returns (uint256) {
        return chiStored;
    }

    function rho() public view returns (uint256) {
        return rhoStored;
    }
}

File 137 of 138 : MockGenericIntegratee.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../utils/SwapperBase.sol";

contract MockGenericIntegratee is SwapperBase {
    function swap(
        address[] calldata _assetsToIntegratee,
        uint256[] calldata _assetsToIntegrateeAmounts,
        address[] calldata _assetsFromIntegratee,
        uint256[] calldata _assetsFromIntegrateeAmounts
    ) external payable {
        __swap(
            msg.sender,
            _assetsToIntegratee,
            _assetsToIntegrateeAmounts,
            _assetsFromIntegratee,
            _assetsFromIntegrateeAmounts
        );
    }

    function swapOnBehalf(
        address payable _trader,
        address[] calldata _assetsToIntegratee,
        uint256[] calldata _assetsToIntegrateeAmounts,
        address[] calldata _assetsFromIntegratee,
        uint256[] calldata _assetsFromIntegrateeAmounts
    ) external payable {
        __swap(
            _trader,
            _assetsToIntegratee,
            _assetsToIntegrateeAmounts,
            _assetsFromIntegratee,
            _assetsFromIntegrateeAmounts
        );
    }
}

File 138 of 138 : AggregatedDerivativePriceFeed.sol
// SPDX-License-Identifier: GPL-3.0

/*
    This file is part of the Enzyme Protocol.

    (c) Enzyme Council <[email protected]>

    For the full license information, please view the LICENSE
    file that was distributed with this source code.
*/

pragma solidity 0.6.12;

import "../../utils/DispatcherOwnerMixin.sol";
import "./IAggregatedDerivativePriceFeed.sol";

/// @title AggregatedDerivativePriceFeed Contract
/// @author Enzyme Council <[email protected]>
/// @notice Aggregates multiple derivative price feeds (e.g., Compound, Chai) and dispatches
/// rate requests to the appropriate feed
contract AggregatedDerivativePriceFeed is IAggregatedDerivativePriceFeed, DispatcherOwnerMixin {
    event DerivativeAdded(address indexed derivative, address priceFeed);

    event DerivativeRemoved(address indexed derivative);

    event DerivativeUpdated(
        address indexed derivative,
        address prevPriceFeed,
        address nextPriceFeed
    );

    mapping(address => address) private derivativeToPriceFeed;

    constructor(
        address _dispatcher,
        address[] memory _derivatives,
        address[] memory _priceFeeds
    ) public DispatcherOwnerMixin(_dispatcher) {
        if (_derivatives.length > 0) {
            __addDerivatives(_derivatives, _priceFeeds);
        }
    }

    /// @notice Gets the rates for 1 unit of the derivative to its underlying assets
    /// @param _derivative The derivative for which to get the rates
    /// @return underlyings_ The underlying assets for the _derivative
    /// @return underlyingAmounts_ The rates for the _derivative to the underlyings_
    function calcUnderlyingValues(address _derivative, uint256 _derivativeAmount)
        external
        override
        returns (address[] memory underlyings_, uint256[] memory underlyingAmounts_)
    {
        address derivativePriceFeed = derivativeToPriceFeed[_derivative];
        require(
            derivativePriceFeed != address(0),
            "calcUnderlyingValues: _derivative is not supported"
        );

        return
            IDerivativePriceFeed(derivativePriceFeed).calcUnderlyingValues(
                _derivative,
                _derivativeAmount
            );
    }

    /// @notice Checks whether an asset is a supported derivative
    /// @param _asset The asset to check
    /// @return isSupported_ True if the asset is a supported derivative
    /// @dev This should be as low-cost and simple as possible
    function isSupportedAsset(address _asset) external view override returns (bool isSupported_) {
        return derivativeToPriceFeed[_asset] != address(0);
    }

    //////////////////////////
    // DERIVATIVES REGISTRY //
    //////////////////////////

    /// @notice Adds a list of derivatives with the given price feed values
    /// @param _derivatives The derivatives to add
    /// @param _priceFeeds The ordered price feeds corresponding to the list of _derivatives
    function addDerivatives(address[] calldata _derivatives, address[] calldata _priceFeeds)
        external
        onlyDispatcherOwner
    {
        require(_derivatives.length > 0, "addDerivatives: _derivatives cannot be empty");

        __addDerivatives(_derivatives, _priceFeeds);
    }

    /// @notice Removes a list of derivatives
    /// @param _derivatives The derivatives to remove
    function removeDerivatives(address[] calldata _derivatives) external onlyDispatcherOwner {
        require(_derivatives.length > 0, "removeDerivatives: _derivatives cannot be empty");

        for (uint256 i = 0; i < _derivatives.length; i++) {
            require(
                derivativeToPriceFeed[_derivatives[i]] != address(0),
                "removeDerivatives: Derivative not yet added"
            );

            delete derivativeToPriceFeed[_derivatives[i]];

            emit DerivativeRemoved(_derivatives[i]);
        }
    }

    /// @notice Updates a list of derivatives with the given price feed values
    /// @param _derivatives The derivatives to update
    /// @param _priceFeeds The ordered price feeds corresponding to the list of _derivatives
    function updateDerivatives(address[] calldata _derivatives, address[] calldata _priceFeeds)
        external
        onlyDispatcherOwner
    {
        require(_derivatives.length > 0, "updateDerivatives: _derivatives cannot be empty");
        require(
            _derivatives.length == _priceFeeds.length,
            "updateDerivatives: Unequal _derivatives and _priceFeeds array lengths"
        );

        for (uint256 i = 0; i < _derivatives.length; i++) {
            address prevPriceFeed = derivativeToPriceFeed[_derivatives[i]];

            require(prevPriceFeed != address(0), "updateDerivatives: Derivative not yet added");
            require(_priceFeeds[i] != prevPriceFeed, "updateDerivatives: Value already set");

            __validateDerivativePriceFeed(_derivatives[i], _priceFeeds[i]);

            derivativeToPriceFeed[_derivatives[i]] = _priceFeeds[i];

            emit DerivativeUpdated(_derivatives[i], prevPriceFeed, _priceFeeds[i]);
        }
    }

    /// @dev Helper to add derivative-feed pairs
    function __addDerivatives(address[] memory _derivatives, address[] memory _priceFeeds)
        private
    {
        require(
            _derivatives.length == _priceFeeds.length,
            "__addDerivatives: Unequal _derivatives and _priceFeeds array lengths"
        );

        for (uint256 i = 0; i < _derivatives.length; i++) {
            require(
                derivativeToPriceFeed[_derivatives[i]] == address(0),
                "__addDerivatives: Already added"
            );

            __validateDerivativePriceFeed(_derivatives[i], _priceFeeds[i]);

            derivativeToPriceFeed[_derivatives[i]] = _priceFeeds[i];

            emit DerivativeAdded(_derivatives[i], _priceFeeds[i]);
        }
    }

    /// @dev Helper to validate a derivative price feed
    function __validateDerivativePriceFeed(address _derivative, address _priceFeed) private view {
        require(_derivative != address(0), "__validateDerivativePriceFeed: Empty _derivative");
        require(_priceFeed != address(0), "__validateDerivativePriceFeed: Empty _priceFeed");
        require(
            IDerivativePriceFeed(_priceFeed).isSupportedAsset(_derivative),
            "__validateDerivativePriceFeed: Unsupported derivative"
        );
    }

    ///////////////////
    // STATE GETTERS //
    ///////////////////

    /// @notice Gets the registered price feed for a given derivative
    /// @return priceFeed_ The price feed contract address
    function getPriceFeedForDerivative(address _derivative)
        external
        view
        override
        returns (address priceFeed_)
    {
        return derivativeToPriceFeed[_derivative];
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200,
    "details": {
      "yul": false
    }
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  }
}

Contract Security Audit

Contract ABI

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Deployed Bytecode

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Deployed Bytecode Sourcemap

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Swarm Source

ipfs://bbf55cdae3dc46d2a5e7b99766dd55ccf780257e97c67bd8075873f6748a9392
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