Contract

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { Cellar, Registry, ERC20 } from "src/base/Cellar.sol";
import { Initializable } from "@openzeppelin/contracts/proxy/utils/Initializable.sol";

contract CellarInitializableV2_1 is Cellar, Initializable {
    /**
     * @notice Constructor is only called for the implementation contract,
     *         so it can be safely filled with mostly zero inputs.
     */
    constructor(Registry _registry)
        Cellar(
            _registry,
            ERC20(address(0)),
            "",
            "",
            abi.encode(new uint32[](0), new uint32[](0), new bytes[](0), new bytes[](0), 0, address(0), 0, 0)
        )
    {}

    /**
     * @notice Initialize function called by factory contract immediately after deployment.
     * @param params abi encoded parameter containing
     *               - Registry contract
     *               - ERC20 cellar asset
     *               - String name of cellar
     *               - String symbol of cellar
     *               - bytes abi encoded parameter containing
     *                 - uint32[] array of credit positions
     *                 - uint32[] array of debt positions
     *                 - bytes[] array of credit config data
     *                 - bytes[] array of debt config data
     *                 - uint32 holding position id
     *                 - address strategist payout address
     *                 - uint128 asset risk tolerance
     *                 - uint128 protocol risk tolerance
     */
    function initialize(bytes calldata params) external initializer {
        (
            address tmpOwner,
            Registry _registry,
            ERC20 _asset,
            string memory _name,
            string memory _symbol,
            bytes memory _params
        ) = abi.decode(params, (address, Registry, ERC20, string, string, bytes));
        // Initialize Cellar
        registry = _registry;
        asset = _asset;
        owner = tmpOwner;
        shareLockPeriod = MAXIMUM_SHARE_LOCK_PERIOD;
        allowedRebalanceDeviation = 0.003e18;
        aavePool = 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9;
        // Initialize ERC20
        name = _name;
        symbol = _symbol;
        decimals = 18;
        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
        // Initialize Reentrancy Guard
        locked = 1;

        // Initialize positions.
        (
            uint32[] memory _creditPositions,
            uint32[] memory _debtPositions,
            bytes[] memory _creditConfigurationData,
            bytes[] memory _debtConfigurationData,
            uint32 _holdingPosition,
            address _strategistPayout,
            uint128 _assetRiskTolerance,
            uint128 _protocolRiskTolerance
        ) = abi.decode(_params, (uint32[], uint32[], bytes[], bytes[], uint32, address, uint128, uint128));

        for (uint32 i; i < _creditPositions.length; i++)
            _addPosition(i, _creditPositions[i], _creditConfigurationData[i], false);
        for (uint32 i; i < _debtPositions.length; i++)
            _addPosition(i, _debtPositions[i], _debtConfigurationData[i], true);
        _setHoldingPosition(_holdingPosition);

        // Initialize remaining values.
        assetRiskTolerance = _assetRiskTolerance;
        protocolRiskTolerance = _protocolRiskTolerance;
        feeData = FeeData({
            strategistPlatformCut: 0.8e18,
            platformFee: 0.005e18,
            lastAccrual: uint64(block.timestamp),
            strategistPayoutAddress: _strategistPayout
        });
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorInterface {
  function latestAnswer() external view returns (int256);

  function latestTimestamp() external view returns (uint256);

  function latestRound() external view returns (uint256);

  function getAnswer(uint256 roundId) external view returns (int256);

  function getTimestamp(uint256 roundId) external view returns (uint256);

  event AnswerUpdated(int256 indexed current, uint256 indexed roundId, uint256 updatedAt);

  event NewRound(uint256 indexed roundId, address indexed startedBy, uint256 startedAt);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "./AggregatorInterface.sol";
import "./AggregatorV3Interface.sol";

interface AggregatorV2V3Interface is AggregatorInterface, AggregatorV3Interface {}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AggregatorV3Interface {
  function decimals() external view returns (uint8);

  function description() external view returns (string memory);

  function version() external view returns (uint256);

  function getRoundData(uint80 _roundId)
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );

  function latestRoundData()
    external
    view
    returns (
      uint80 roundId,
      int256 answer,
      uint256 startedAt,
      uint256 updatedAt,
      uint80 answeredInRound
    );
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

interface AutomationCompatibleInterface {
  /**
   * @notice method that is simulated by the keepers to see if any work actually
   * needs to be performed. This method does does not actually need to be
   * executable, and since it is only ever simulated it can consume lots of gas.
   * @dev To ensure that it is never called, you may want to add the
   * cannotExecute modifier from KeeperBase to your implementation of this
   * method.
   * @param checkData specified in the upkeep registration so it is always the
   * same for a registered upkeep. This can easily be broken down into specific
   * arguments using `abi.decode`, so multiple upkeeps can be registered on the
   * same contract and easily differentiated by the contract.
   * @return upkeepNeeded boolean to indicate whether the keeper should call
   * performUpkeep or not.
   * @return performData bytes that the keeper should call performUpkeep with, if
   * upkeep is needed. If you would like to encode data to decode later, try
   * `abi.encode`.
   */
  function checkUpkeep(bytes calldata checkData) external returns (bool upkeepNeeded, bytes memory performData);

  /**
   * @notice method that is actually executed by the keepers, via the registry.
   * The data returned by the checkUpkeep simulation will be passed into
   * this method to actually be executed.
   * @dev The input to this method should not be trusted, and the caller of the
   * method should not even be restricted to any single registry. Anyone should
   * be able call it, and the input should be validated, there is no guarantee
   * that the data passed in is the performData returned from checkUpkeep. This
   * could happen due to malicious keepers, racing keepers, or simply a state
   * change while the performUpkeep transaction is waiting for confirmation.
   * Always validate the data passed in.
   * @param performData is the data which was passed back from the checkData
   * simulation. If it is encoded, it can easily be decoded into other types by
   * calling `abi.decode`. This data should not be trusted, and should be
   * validated against the contract's current state.
   */
  function performUpkeep(bytes calldata performData) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/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.
 */
abstract 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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (proxy/utils/Initializable.sol)

pragma solidity ^0.8.2;

import "../../utils/Address.sol";

/**
 * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
 * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
 * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
 * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
 *
 * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
 * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
 * case an upgrade adds a module that needs to be initialized.
 *
 * For example:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * contract MyToken is ERC20Upgradeable {
 *     function initialize() initializer public {
 *         __ERC20_init("MyToken", "MTK");
 *     }
 * }
 * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
 *     function initializeV2() reinitializer(2) public {
 *         __ERC20Permit_init("MyToken");
 *     }
 * }
 * ```
 *
 * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
 * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
 *
 * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
 * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
 *
 * [CAUTION]
 * ====
 * Avoid leaving a contract uninitialized.
 *
 * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
 * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
 * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
 *
 * [.hljs-theme-light.nopadding]
 * ```
 * /// @custom:oz-upgrades-unsafe-allow constructor
 * constructor() {
 *     _disableInitializers();
 * }
 * ```
 * ====
 */
abstract contract Initializable {
    /**
     * @dev Indicates that the contract has been initialized.
     * @custom:oz-retyped-from bool
     */
    uint8 private _initialized;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private _initializing;

    /**
     * @dev Triggered when the contract has been initialized or reinitialized.
     */
    event Initialized(uint8 version);

    /**
     * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
     * `onlyInitializing` functions can be used to initialize parent contracts.
     *
     * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
     * constructor.
     *
     * Emits an {Initialized} event.
     */
    modifier initializer() {
        bool isTopLevelCall = !_initializing;
        require(
            (isTopLevelCall && _initialized < 1) || (!Address.isContract(address(this)) && _initialized == 1),
            "Initializable: contract is already initialized"
        );
        _initialized = 1;
        if (isTopLevelCall) {
            _initializing = true;
        }
        _;
        if (isTopLevelCall) {
            _initializing = false;
            emit Initialized(1);
        }
    }

    /**
     * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
     * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
     * used to initialize parent contracts.
     *
     * A reinitializer may be used after the original initialization step. This is essential to configure modules that
     * are added through upgrades and that require initialization.
     *
     * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
     * cannot be nested. If one is invoked in the context of another, execution will revert.
     *
     * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
     * a contract, executing them in the right order is up to the developer or operator.
     *
     * WARNING: setting the version to 255 will prevent any future reinitialization.
     *
     * Emits an {Initialized} event.
     */
    modifier reinitializer(uint8 version) {
        require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
        _initialized = version;
        _initializing = true;
        _;
        _initializing = false;
        emit Initialized(version);
    }

    /**
     * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
     * {initializer} and {reinitializer} modifiers, directly or indirectly.
     */
    modifier onlyInitializing() {
        require(_initializing, "Initializable: contract is not initializing");
        _;
    }

    /**
     * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
     * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
     * to any version. It is recommended to use this to lock implementation contracts that are designed to be called
     * through proxies.
     *
     * Emits an {Initialized} event the first time it is successfully executed.
     */
    function _disableInitializers() internal virtual {
        require(!_initializing, "Initializable: contract is initializing");
        if (_initialized < type(uint8).max) {
            _initialized = type(uint8).max;
            emit Initialized(type(uint8).max);
        }
    }

    /**
     * @dev Internal function that returns the initialized version. Returns `_initialized`
     */
    function _getInitializedVersion() internal view returns (uint8) {
        return _initialized;
    }

    /**
     * @dev Internal function that returns the initialized version. Returns `_initializing`
     */
    function _isInitializing() internal view returns (bool) {
        return _initializing;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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);

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC721/IERC721Receiver.sol)

pragma solidity ^0.8.0;

/**
 * @title ERC721 token receiver interface
 * @dev Interface for any contract that wants to support safeTransfers
 * from ERC721 asset contracts.
 */
interface IERC721Receiver {
    /**
     * @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
     * by `operator` from `from`, this function is called.
     *
     * It must return its Solidity selector to confirm the token transfer.
     * If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
     *
     * The selector can be obtained in Solidity with `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address operator,
        address from,
        uint256 tokenId,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC721/utils/ERC721Holder.sol)

pragma solidity ^0.8.0;

import "../IERC721Receiver.sol";

/**
 * @dev Implementation of the {IERC721Receiver} interface.
 *
 * Accepts all token transfers.
 * Make sure the contract is able to use its token with {IERC721-safeTransferFrom}, {IERC721-approve} or {IERC721-setApprovalForAll}.
 */
contract ERC721Holder is IERC721Receiver {
    /**
     * @dev See {IERC721Receiver-onERC721Received}.
     *
     * Always returns `IERC721Receiver.onERC721Received.selector`.
     */
    function onERC721Received(
        address,
        address,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC721Received.selector;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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://consensys.net/diligence/blog/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");

        (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 functionCallWithValue(target, data, 0, "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");
        (bool success, bytes memory returndata) = target.call{value: value}(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
        return functionStaticCall(target, data, "Address: low-level static call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResultFromTarget(target, success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
     * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
     *
     * _Available since v4.8._
     */
    function verifyCallResultFromTarget(
        address target,
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        if (success) {
            if (returndata.length == 0) {
                // only check isContract if the call was successful and the return data is empty
                // otherwise we already know that it was a contract
                require(isContract(target), "Address: call to non-contract");
            }
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    /**
     * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason or using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            _revert(returndata, errorMessage);
        }
    }

    function _revert(bytes memory returndata, string memory errorMessage) private pure {
        // 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
            /// @solidity memory-safe-assembly
            assembly {
                let returndata_size := mload(returndata)
                revert(add(32, returndata), returndata_size)
            }
        } else {
            revert(errorMessage);
        }
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^0.8.0;

/**
 * @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 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) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such 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.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint248 from uint256, reverting on
     * overflow (when the input is greater than largest uint248).
     *
     * Counterpart to Solidity's `uint248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toUint248(uint256 value) internal pure returns (uint248) {
        require(value <= type(uint248).max, "SafeCast: value doesn't fit in 248 bits");
        return uint248(value);
    }

    /**
     * @dev Returns the downcasted uint240 from uint256, reverting on
     * overflow (when the input is greater than largest uint240).
     *
     * Counterpart to Solidity's `uint240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toUint240(uint256 value) internal pure returns (uint240) {
        require(value <= type(uint240).max, "SafeCast: value doesn't fit in 240 bits");
        return uint240(value);
    }

    /**
     * @dev Returns the downcasted uint232 from uint256, reverting on
     * overflow (when the input is greater than largest uint232).
     *
     * Counterpart to Solidity's `uint232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toUint232(uint256 value) internal pure returns (uint232) {
        require(value <= type(uint232).max, "SafeCast: value doesn't fit in 232 bits");
        return uint232(value);
    }

    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.2._
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint216 from uint256, reverting on
     * overflow (when the input is greater than largest uint216).
     *
     * Counterpart to Solidity's `uint216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toUint216(uint256 value) internal pure returns (uint216) {
        require(value <= type(uint216).max, "SafeCast: value doesn't fit in 216 bits");
        return uint216(value);
    }

    /**
     * @dev Returns the downcasted uint208 from uint256, reverting on
     * overflow (when the input is greater than largest uint208).
     *
     * Counterpart to Solidity's `uint208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toUint208(uint256 value) internal pure returns (uint208) {
        require(value <= type(uint208).max, "SafeCast: value doesn't fit in 208 bits");
        return uint208(value);
    }

    /**
     * @dev Returns the downcasted uint200 from uint256, reverting on
     * overflow (when the input is greater than largest uint200).
     *
     * Counterpart to Solidity's `uint200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toUint200(uint256 value) internal pure returns (uint200) {
        require(value <= type(uint200).max, "SafeCast: value doesn't fit in 200 bits");
        return uint200(value);
    }

    /**
     * @dev Returns the downcasted uint192 from uint256, reverting on
     * overflow (when the input is greater than largest uint192).
     *
     * Counterpart to Solidity's `uint192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toUint192(uint256 value) internal pure returns (uint192) {
        require(value <= type(uint192).max, "SafeCast: value doesn't fit in 192 bits");
        return uint192(value);
    }

    /**
     * @dev Returns the downcasted uint184 from uint256, reverting on
     * overflow (when the input is greater than largest uint184).
     *
     * Counterpart to Solidity's `uint184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toUint184(uint256 value) internal pure returns (uint184) {
        require(value <= type(uint184).max, "SafeCast: value doesn't fit in 184 bits");
        return uint184(value);
    }

    /**
     * @dev Returns the downcasted uint176 from uint256, reverting on
     * overflow (when the input is greater than largest uint176).
     *
     * Counterpart to Solidity's `uint176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toUint176(uint256 value) internal pure returns (uint176) {
        require(value <= type(uint176).max, "SafeCast: value doesn't fit in 176 bits");
        return uint176(value);
    }

    /**
     * @dev Returns the downcasted uint168 from uint256, reverting on
     * overflow (when the input is greater than largest uint168).
     *
     * Counterpart to Solidity's `uint168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toUint168(uint256 value) internal pure returns (uint168) {
        require(value <= type(uint168).max, "SafeCast: value doesn't fit in 168 bits");
        return uint168(value);
    }

    /**
     * @dev Returns the downcasted uint160 from uint256, reverting on
     * overflow (when the input is greater than largest uint160).
     *
     * Counterpart to Solidity's `uint160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toUint160(uint256 value) internal pure returns (uint160) {
        require(value <= type(uint160).max, "SafeCast: value doesn't fit in 160 bits");
        return uint160(value);
    }

    /**
     * @dev Returns the downcasted uint152 from uint256, reverting on
     * overflow (when the input is greater than largest uint152).
     *
     * Counterpart to Solidity's `uint152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toUint152(uint256 value) internal pure returns (uint152) {
        require(value <= type(uint152).max, "SafeCast: value doesn't fit in 152 bits");
        return uint152(value);
    }

    /**
     * @dev Returns the downcasted uint144 from uint256, reverting on
     * overflow (when the input is greater than largest uint144).
     *
     * Counterpart to Solidity's `uint144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toUint144(uint256 value) internal pure returns (uint144) {
        require(value <= type(uint144).max, "SafeCast: value doesn't fit in 144 bits");
        return uint144(value);
    }

    /**
     * @dev Returns the downcasted uint136 from uint256, reverting on
     * overflow (when the input is greater than largest uint136).
     *
     * Counterpart to Solidity's `uint136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toUint136(uint256 value) internal pure returns (uint136) {
        require(value <= type(uint136).max, "SafeCast: value doesn't fit in 136 bits");
        return uint136(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v2.5._
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint120 from uint256, reverting on
     * overflow (when the input is greater than largest uint120).
     *
     * Counterpart to Solidity's `uint120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toUint120(uint256 value) internal pure returns (uint120) {
        require(value <= type(uint120).max, "SafeCast: value doesn't fit in 120 bits");
        return uint120(value);
    }

    /**
     * @dev Returns the downcasted uint112 from uint256, reverting on
     * overflow (when the input is greater than largest uint112).
     *
     * Counterpart to Solidity's `uint112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toUint112(uint256 value) internal pure returns (uint112) {
        require(value <= type(uint112).max, "SafeCast: value doesn't fit in 112 bits");
        return uint112(value);
    }

    /**
     * @dev Returns the downcasted uint104 from uint256, reverting on
     * overflow (when the input is greater than largest uint104).
     *
     * Counterpart to Solidity's `uint104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toUint104(uint256 value) internal pure returns (uint104) {
        require(value <= type(uint104).max, "SafeCast: value doesn't fit in 104 bits");
        return uint104(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.2._
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint88 from uint256, reverting on
     * overflow (when the input is greater than largest uint88).
     *
     * Counterpart to Solidity's `uint88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toUint88(uint256 value) internal pure returns (uint88) {
        require(value <= type(uint88).max, "SafeCast: value doesn't fit in 88 bits");
        return uint88(value);
    }

    /**
     * @dev Returns the downcasted uint80 from uint256, reverting on
     * overflow (when the input is greater than largest uint80).
     *
     * Counterpart to Solidity's `uint80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toUint80(uint256 value) internal pure returns (uint80) {
        require(value <= type(uint80).max, "SafeCast: value doesn't fit in 80 bits");
        return uint80(value);
    }

    /**
     * @dev Returns the downcasted uint72 from uint256, reverting on
     * overflow (when the input is greater than largest uint72).
     *
     * Counterpart to Solidity's `uint72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toUint72(uint256 value) internal pure returns (uint72) {
        require(value <= type(uint72).max, "SafeCast: value doesn't fit in 72 bits");
        return uint72(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v2.5._
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint56 from uint256, reverting on
     * overflow (when the input is greater than largest uint56).
     *
     * Counterpart to Solidity's `uint56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toUint56(uint256 value) internal pure returns (uint56) {
        require(value <= type(uint56).max, "SafeCast: value doesn't fit in 56 bits");
        return uint56(value);
    }

    /**
     * @dev Returns the downcasted uint48 from uint256, reverting on
     * overflow (when the input is greater than largest uint48).
     *
     * Counterpart to Solidity's `uint48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toUint48(uint256 value) internal pure returns (uint48) {
        require(value <= type(uint48).max, "SafeCast: value doesn't fit in 48 bits");
        return uint48(value);
    }

    /**
     * @dev Returns the downcasted uint40 from uint256, reverting on
     * overflow (when the input is greater than largest uint40).
     *
     * Counterpart to Solidity's `uint40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toUint40(uint256 value) internal pure returns (uint40) {
        require(value <= type(uint40).max, "SafeCast: value doesn't fit in 40 bits");
        return uint40(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v2.5._
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint24 from uint256, reverting on
     * overflow (when the input is greater than largest uint24).
     *
     * Counterpart to Solidity's `uint24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toUint24(uint256 value) internal pure returns (uint24) {
        require(value <= type(uint24).max, "SafeCast: value doesn't fit in 24 bits");
        return uint24(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v2.5._
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v2.5._
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     *
     * _Available since v3.0._
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int248 from int256, reverting on
     * overflow (when the input is less than smallest int248 or
     * greater than largest int248).
     *
     * Counterpart to Solidity's `int248` operator.
     *
     * Requirements:
     *
     * - input must fit into 248 bits
     *
     * _Available since v4.7._
     */
    function toInt248(int256 value) internal pure returns (int248 downcasted) {
        downcasted = int248(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 248 bits");
    }

    /**
     * @dev Returns the downcasted int240 from int256, reverting on
     * overflow (when the input is less than smallest int240 or
     * greater than largest int240).
     *
     * Counterpart to Solidity's `int240` operator.
     *
     * Requirements:
     *
     * - input must fit into 240 bits
     *
     * _Available since v4.7._
     */
    function toInt240(int256 value) internal pure returns (int240 downcasted) {
        downcasted = int240(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 240 bits");
    }

    /**
     * @dev Returns the downcasted int232 from int256, reverting on
     * overflow (when the input is less than smallest int232 or
     * greater than largest int232).
     *
     * Counterpart to Solidity's `int232` operator.
     *
     * Requirements:
     *
     * - input must fit into 232 bits
     *
     * _Available since v4.7._
     */
    function toInt232(int256 value) internal pure returns (int232 downcasted) {
        downcasted = int232(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 232 bits");
    }

    /**
     * @dev Returns the downcasted int224 from int256, reverting on
     * overflow (when the input is less than smallest int224 or
     * greater than largest int224).
     *
     * Counterpart to Solidity's `int224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     *
     * _Available since v4.7._
     */
    function toInt224(int256 value) internal pure returns (int224 downcasted) {
        downcasted = int224(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 224 bits");
    }

    /**
     * @dev Returns the downcasted int216 from int256, reverting on
     * overflow (when the input is less than smallest int216 or
     * greater than largest int216).
     *
     * Counterpart to Solidity's `int216` operator.
     *
     * Requirements:
     *
     * - input must fit into 216 bits
     *
     * _Available since v4.7._
     */
    function toInt216(int256 value) internal pure returns (int216 downcasted) {
        downcasted = int216(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 216 bits");
    }

    /**
     * @dev Returns the downcasted int208 from int256, reverting on
     * overflow (when the input is less than smallest int208 or
     * greater than largest int208).
     *
     * Counterpart to Solidity's `int208` operator.
     *
     * Requirements:
     *
     * - input must fit into 208 bits
     *
     * _Available since v4.7._
     */
    function toInt208(int256 value) internal pure returns (int208 downcasted) {
        downcasted = int208(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 208 bits");
    }

    /**
     * @dev Returns the downcasted int200 from int256, reverting on
     * overflow (when the input is less than smallest int200 or
     * greater than largest int200).
     *
     * Counterpart to Solidity's `int200` operator.
     *
     * Requirements:
     *
     * - input must fit into 200 bits
     *
     * _Available since v4.7._
     */
    function toInt200(int256 value) internal pure returns (int200 downcasted) {
        downcasted = int200(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 200 bits");
    }

    /**
     * @dev Returns the downcasted int192 from int256, reverting on
     * overflow (when the input is less than smallest int192 or
     * greater than largest int192).
     *
     * Counterpart to Solidity's `int192` operator.
     *
     * Requirements:
     *
     * - input must fit into 192 bits
     *
     * _Available since v4.7._
     */
    function toInt192(int256 value) internal pure returns (int192 downcasted) {
        downcasted = int192(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 192 bits");
    }

    /**
     * @dev Returns the downcasted int184 from int256, reverting on
     * overflow (when the input is less than smallest int184 or
     * greater than largest int184).
     *
     * Counterpart to Solidity's `int184` operator.
     *
     * Requirements:
     *
     * - input must fit into 184 bits
     *
     * _Available since v4.7._
     */
    function toInt184(int256 value) internal pure returns (int184 downcasted) {
        downcasted = int184(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 184 bits");
    }

    /**
     * @dev Returns the downcasted int176 from int256, reverting on
     * overflow (when the input is less than smallest int176 or
     * greater than largest int176).
     *
     * Counterpart to Solidity's `int176` operator.
     *
     * Requirements:
     *
     * - input must fit into 176 bits
     *
     * _Available since v4.7._
     */
    function toInt176(int256 value) internal pure returns (int176 downcasted) {
        downcasted = int176(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 176 bits");
    }

    /**
     * @dev Returns the downcasted int168 from int256, reverting on
     * overflow (when the input is less than smallest int168 or
     * greater than largest int168).
     *
     * Counterpart to Solidity's `int168` operator.
     *
     * Requirements:
     *
     * - input must fit into 168 bits
     *
     * _Available since v4.7._
     */
    function toInt168(int256 value) internal pure returns (int168 downcasted) {
        downcasted = int168(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 168 bits");
    }

    /**
     * @dev Returns the downcasted int160 from int256, reverting on
     * overflow (when the input is less than smallest int160 or
     * greater than largest int160).
     *
     * Counterpart to Solidity's `int160` operator.
     *
     * Requirements:
     *
     * - input must fit into 160 bits
     *
     * _Available since v4.7._
     */
    function toInt160(int256 value) internal pure returns (int160 downcasted) {
        downcasted = int160(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 160 bits");
    }

    /**
     * @dev Returns the downcasted int152 from int256, reverting on
     * overflow (when the input is less than smallest int152 or
     * greater than largest int152).
     *
     * Counterpart to Solidity's `int152` operator.
     *
     * Requirements:
     *
     * - input must fit into 152 bits
     *
     * _Available since v4.7._
     */
    function toInt152(int256 value) internal pure returns (int152 downcasted) {
        downcasted = int152(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 152 bits");
    }

    /**
     * @dev Returns the downcasted int144 from int256, reverting on
     * overflow (when the input is less than smallest int144 or
     * greater than largest int144).
     *
     * Counterpart to Solidity's `int144` operator.
     *
     * Requirements:
     *
     * - input must fit into 144 bits
     *
     * _Available since v4.7._
     */
    function toInt144(int256 value) internal pure returns (int144 downcasted) {
        downcasted = int144(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 144 bits");
    }

    /**
     * @dev Returns the downcasted int136 from int256, reverting on
     * overflow (when the input is less than smallest int136 or
     * greater than largest int136).
     *
     * Counterpart to Solidity's `int136` operator.
     *
     * Requirements:
     *
     * - input must fit into 136 bits
     *
     * _Available since v4.7._
     */
    function toInt136(int256 value) internal pure returns (int136 downcasted) {
        downcasted = int136(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 136 bits");
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128 downcasted) {
        downcasted = int128(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 128 bits");
    }

    /**
     * @dev Returns the downcasted int120 from int256, reverting on
     * overflow (when the input is less than smallest int120 or
     * greater than largest int120).
     *
     * Counterpart to Solidity's `int120` operator.
     *
     * Requirements:
     *
     * - input must fit into 120 bits
     *
     * _Available since v4.7._
     */
    function toInt120(int256 value) internal pure returns (int120 downcasted) {
        downcasted = int120(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 120 bits");
    }

    /**
     * @dev Returns the downcasted int112 from int256, reverting on
     * overflow (when the input is less than smallest int112 or
     * greater than largest int112).
     *
     * Counterpart to Solidity's `int112` operator.
     *
     * Requirements:
     *
     * - input must fit into 112 bits
     *
     * _Available since v4.7._
     */
    function toInt112(int256 value) internal pure returns (int112 downcasted) {
        downcasted = int112(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 112 bits");
    }

    /**
     * @dev Returns the downcasted int104 from int256, reverting on
     * overflow (when the input is less than smallest int104 or
     * greater than largest int104).
     *
     * Counterpart to Solidity's `int104` operator.
     *
     * Requirements:
     *
     * - input must fit into 104 bits
     *
     * _Available since v4.7._
     */
    function toInt104(int256 value) internal pure returns (int104 downcasted) {
        downcasted = int104(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 104 bits");
    }

    /**
     * @dev Returns the downcasted int96 from int256, reverting on
     * overflow (when the input is less than smallest int96 or
     * greater than largest int96).
     *
     * Counterpart to Solidity's `int96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     *
     * _Available since v4.7._
     */
    function toInt96(int256 value) internal pure returns (int96 downcasted) {
        downcasted = int96(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 96 bits");
    }

    /**
     * @dev Returns the downcasted int88 from int256, reverting on
     * overflow (when the input is less than smallest int88 or
     * greater than largest int88).
     *
     * Counterpart to Solidity's `int88` operator.
     *
     * Requirements:
     *
     * - input must fit into 88 bits
     *
     * _Available since v4.7._
     */
    function toInt88(int256 value) internal pure returns (int88 downcasted) {
        downcasted = int88(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 88 bits");
    }

    /**
     * @dev Returns the downcasted int80 from int256, reverting on
     * overflow (when the input is less than smallest int80 or
     * greater than largest int80).
     *
     * Counterpart to Solidity's `int80` operator.
     *
     * Requirements:
     *
     * - input must fit into 80 bits
     *
     * _Available since v4.7._
     */
    function toInt80(int256 value) internal pure returns (int80 downcasted) {
        downcasted = int80(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 80 bits");
    }

    /**
     * @dev Returns the downcasted int72 from int256, reverting on
     * overflow (when the input is less than smallest int72 or
     * greater than largest int72).
     *
     * Counterpart to Solidity's `int72` operator.
     *
     * Requirements:
     *
     * - input must fit into 72 bits
     *
     * _Available since v4.7._
     */
    function toInt72(int256 value) internal pure returns (int72 downcasted) {
        downcasted = int72(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 72 bits");
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64 downcasted) {
        downcasted = int64(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 64 bits");
    }

    /**
     * @dev Returns the downcasted int56 from int256, reverting on
     * overflow (when the input is less than smallest int56 or
     * greater than largest int56).
     *
     * Counterpart to Solidity's `int56` operator.
     *
     * Requirements:
     *
     * - input must fit into 56 bits
     *
     * _Available since v4.7._
     */
    function toInt56(int256 value) internal pure returns (int56 downcasted) {
        downcasted = int56(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 56 bits");
    }

    /**
     * @dev Returns the downcasted int48 from int256, reverting on
     * overflow (when the input is less than smallest int48 or
     * greater than largest int48).
     *
     * Counterpart to Solidity's `int48` operator.
     *
     * Requirements:
     *
     * - input must fit into 48 bits
     *
     * _Available since v4.7._
     */
    function toInt48(int256 value) internal pure returns (int48 downcasted) {
        downcasted = int48(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 48 bits");
    }

    /**
     * @dev Returns the downcasted int40 from int256, reverting on
     * overflow (when the input is less than smallest int40 or
     * greater than largest int40).
     *
     * Counterpart to Solidity's `int40` operator.
     *
     * Requirements:
     *
     * - input must fit into 40 bits
     *
     * _Available since v4.7._
     */
    function toInt40(int256 value) internal pure returns (int40 downcasted) {
        downcasted = int40(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 40 bits");
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32 downcasted) {
        downcasted = int32(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 32 bits");
    }

    /**
     * @dev Returns the downcasted int24 from int256, reverting on
     * overflow (when the input is less than smallest int24 or
     * greater than largest int24).
     *
     * Counterpart to Solidity's `int24` operator.
     *
     * Requirements:
     *
     * - input must fit into 24 bits
     *
     * _Available since v4.7._
     */
    function toInt24(int256 value) internal pure returns (int24 downcasted) {
        downcasted = int24(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 24 bits");
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16 downcasted) {
        downcasted = int16(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 16 bits");
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8 downcasted) {
        downcasted = int8(value);
        require(downcasted == value, "SafeCast: value doesn't fit in 8 bits");
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     *
     * _Available since v3.0._
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Simple single owner authorization mixin.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/auth/Owned.sol)
abstract contract Owned {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event OwnershipTransferred(address indexed user, address indexed newOwner);

    /*//////////////////////////////////////////////////////////////
                            OWNERSHIP STORAGE
    //////////////////////////////////////////////////////////////*/

    address public owner;

    modifier onlyOwner() virtual {
        require(msg.sender == owner, "UNAUTHORIZED");

        _;
    }

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(address _owner) {
        owner = _owner;

        emit OwnershipTransferred(address(0), _owner);
    }

    /*//////////////////////////////////////////////////////////////
                             OWNERSHIP LOGIC
    //////////////////////////////////////////////////////////////*/

    function transferOwnership(address newOwner) public virtual onlyOwner {
        owner = newOwner;

        emit OwnershipTransferred(msg.sender, newOwner);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { Cellar } from "src/base/Cellar.sol";
import { ERC20 } from "src/base/ERC20.sol";
import { BaseAdaptor } from "src/modules/adaptors/BaseAdaptor.sol";
import { PriceRouter } from "src/modules/price-router/PriceRouter.sol";

contract Registry is Ownable {
    // ============================================= ADDRESS CONFIG =============================================

    /**
     * @notice Emitted when the address of a contract is changed.
     * @param id value representing the unique ID tied to the changed contract
     * @param oldAddress address of the contract before the change
     * @param newAddress address of the contract after the contract
     */
    event AddressChanged(uint256 indexed id, address oldAddress, address newAddress);

    /**
     * @notice Attempted to set the address of a contract that is not registered.
     * @param id id of the contract that is not registered
     */
    error Registry__ContractNotRegistered(uint256 id);

    /**
     * @notice Emitted when depositor privilege changes.
     * @param depositor depositor address
     * @param state the new state of the depositor privilege
     */
    event DepositorOnBehalfChanged(address depositor, bool state);

    /**
     * @notice The unique ID that the next registered contract will have.
     */
    uint256 public nextId;

    /**
     * @notice Get the address associated with an id.
     */
    mapping(uint256 => address) public getAddress;

    /**
     * @notice In order for an address to make deposits on behalf of users they must be approved.
     */
    mapping(address => bool) public approvedForDepositOnBehalf;

    /**
     * @notice toggles a depositors  ability to deposit into cellars on behalf of users.
     */
    function setApprovedForDepositOnBehalf(address depositor, bool state) external onlyOwner {
        approvedForDepositOnBehalf[depositor] = state;
        emit DepositorOnBehalfChanged(depositor, state);
    }

    /**
     * @notice Set the address of the contract at a given id.
     */
    function setAddress(uint256 id, address newAddress) external onlyOwner {
        if (id >= nextId) revert Registry__ContractNotRegistered(id);

        emit AddressChanged(id, getAddress[id], newAddress);

        getAddress[id] = newAddress;
    }

    // ============================================= INITIALIZATION =============================================

    /**
     * @param gravityBridge address of GravityBridge contract
     * @param swapRouter address of SwapRouter contract
     * @param priceRouter address of PriceRouter contract
     */
    constructor(
        address gravityBridge,
        address swapRouter,
        address priceRouter
    ) Ownable() {
        _register(gravityBridge);
        _register(swapRouter);
        _register(priceRouter);
    }

    // ============================================ REGISTER CONFIG ============================================

    /**
     * @notice Emitted when a new contract is registered.
     * @param id value representing the unique ID tied to the new contract
     * @param newContract address of the new contract
     */
    event Registered(uint256 indexed id, address indexed newContract);

    /**
     * @notice Register the address of a new contract.
     * @param newContract address of the new contract to register
     */
    function register(address newContract) external onlyOwner {
        _register(newContract);
    }

    function _register(address newContract) internal {
        getAddress[nextId] = newContract;

        emit Registered(nextId, newContract);

        nextId++;
    }

    // ============================================ FEE DISTRIBUTOR LOGIC ============================================
    /**
     * @notice Emitted when fees distributor is changed.
     * @param oldFeesDistributor address of fee distributor was changed from
     * @param newFeesDistributor address of fee distributor was changed to
     */
    event FeesDistributorChanged(bytes32 oldFeesDistributor, bytes32 newFeesDistributor);

    /**
     * @notice Attempted to use an invalid cosmos address.
     */
    error Registry__InvalidCosmosAddress();

    bytes32 public feesDistributor = hex"000000000000000000000000b813554b423266bbd4c16c32fa383394868c1f55";

    /**
     * @notice Set the address of the fee distributor on the Sommelier chain.
     * @dev IMPORTANT: Ensure that the address is formatted in the specific way that the Gravity contract
     *      expects it to be.
     * @param newFeesDistributor formatted address of the new fee distributor module
     */
    function setFeesDistributor(bytes32 newFeesDistributor) external onlyOwner {
        if (uint256(newFeesDistributor) > type(uint160).max) revert Registry__InvalidCosmosAddress();
        emit FeesDistributorChanged(feesDistributor, newFeesDistributor);

        feesDistributor = newFeesDistributor;
    }

    // ============================================ POSITION LOGIC ============================================
    /**
     * @notice stores data related to Cellar positions.
     * @param adaptors address of the adaptor to use for this position
     * @param isDebt bool indicating whether this position takes on debt or not
     * @param adaptorData arbitrary data needed to correclty set up a position
     * @param configurationData arbitrary data settable by strategist to change cellar <-> adaptor interaction
     */
    struct PositionData {
        address adaptor;
        bool isDebt;
        bytes adaptorData;
        bytes configurationData;
    }

    /**
     * @notice stores data to help cellars manage their risk.
     * @param assetRisk number 0 -> type(uint128).max indicating how risky a cellars assets can be
     *                  0: Safest
     *                  1: Riskiest
     * @param protocolRisk number 0 -> type(uint128).max indicating how risky a cellars position protocol can be
     *                     0: Safest
     *                     1: Riskiest
     */
    struct RiskData {
        uint128 assetRisk;
        uint128 protocolRisk;
    }

    /**
     * @notice Emitted when a new position is added to the registry.
     * @param id the positions id
     * @param adaptor address of the adaptor this position uses
     * @param isDebt bool indicating whether this position takes on debt or not
     * @param adaptorData arbitrary bytes used to configure this position
     */
    event PositionAdded(uint32 id, address adaptor, bool isDebt, bytes adaptorData);

    /**
     * @notice Attempted to trust a position not being used.
     * @param position address of the invalid position
     */
    error Registry__PositionPricingNotSetUp(address position);

    /**
     * @notice Attempted to add a position with bad input values.
     */
    error Registry__InvalidPositionInput();

    /**
     * @notice Attempted to add a position with a risky asset.
     */
    error Registry__AssetTooRisky();

    /**
     * @notice Attempted to add a position with a risky protocol.
     */
    error Registry__ProtocolTooRisky();

    /**
     * @notice Attempted to add a position that does not exist.
     */
    error Registry__PositionDoesNotExist();

    /**
     * @notice Addresses of the positions currently used by the cellar.
     */
    uint256 public constant PRICE_ROUTER_REGISTRY_SLOT = 2;

    /**
     * @notice Maps a position Id to its risk data.
     */
    mapping(uint32 => RiskData) public getRiskData;

    /**
     * @notice Maps an adaptor to its risk data.
     */
    mapping(address => RiskData) public getAdaptorRiskData;

    /**
     * @notice Stores the number of positions that have been added to the registry.
     *         Starts at 1.
     */
    uint32 public positionCount;

    /**
     * @notice Maps a position hash to a position Id.
     * @dev can be used by adaptors to verify that a certain position is open during Cellar `callOnAdaptor` calls.
     */
    mapping(bytes32 => uint32) public getPositionHashToPositionId;

    /**
     * @notice Maps a position id to its position data.
     * @dev used by Cellars when adding new positions.
     */
    mapping(uint32 => PositionData) public getPositionIdToPositionData;

    /**
     * @notice Trust a position to be used by the cellar.
     * @param adaptor the adaptor address this position uses
     * @param adaptorData arbitrary bytes used to configure this position
     * @param assetRisk the risk rating of this positions asset
     * @param protocolRisk the risk rating of this positions underlying protocol
     * @return positionId the position id of the newly added position
     */
    function trustPosition(
        address adaptor,
        bytes memory adaptorData,
        uint128 assetRisk,
        uint128 protocolRisk
    ) external onlyOwner returns (uint32 positionId) {
        bytes32 identifier = BaseAdaptor(adaptor).identifier();
        bool isDebt = BaseAdaptor(adaptor).isDebt();
        bytes32 positionHash = keccak256(abi.encode(identifier, isDebt, adaptorData));
        positionId = positionCount + 1; //Add one so that we do not use Id 0.

        // Check that...
        // `adaptor` is a non zero address
        // position has not been already set up
        if (adaptor == address(0) || getPositionHashToPositionId[positionHash] != 0)
            revert Registry__InvalidPositionInput();

        if (!isAdaptorTrusted[adaptor]) revert Registry__AdaptorNotTrusted();

        // Set position data.
        getPositionIdToPositionData[positionId] = PositionData({
            adaptor: adaptor,
            isDebt: isDebt,
            adaptorData: adaptorData,
            configurationData: abi.encode(0)
        });

        getRiskData[positionId] = RiskData({ assetRisk: assetRisk, protocolRisk: protocolRisk });

        getPositionHashToPositionId[positionHash] = positionId;

        // Check that assets position uses are supported for pricing operations.
        ERC20[] memory assets = BaseAdaptor(adaptor).assetsUsed(adaptorData);
        PriceRouter priceRouter = PriceRouter(getAddress[PRICE_ROUTER_REGISTRY_SLOT]);
        for (uint256 i; i < assets.length; i++) {
            if (!priceRouter.isSupported(assets[i])) revert Registry__PositionPricingNotSetUp(address(assets[i]));
        }

        positionCount = positionId;

        emit PositionAdded(positionId, adaptor, isDebt, adaptorData);
    }

    /**
     * @notice Called by Cellars to add a new position to themselves.
     * @param positionId the id of the position the cellar wants to add
     * @param assetRiskTolerance the cellars risk tolerance for assets
     * @param protocolRiskTolerance the cellars risk tolerance for protocols
     * @return adaptor the address of the adaptor, isDebt bool indicating whether position is
     *         debt or not, and adaptorData needed to interact with position
     */
    function cellarAddPosition(
        uint32 positionId,
        uint128 assetRiskTolerance,
        uint128 protocolRiskTolerance
    )
        external
        view
        returns (
            address adaptor,
            bool isDebt,
            bytes memory adaptorData
        )
    {
        if (positionId > positionCount || positionId == 0) revert Registry__PositionDoesNotExist();
        RiskData memory data = getRiskData[positionId];
        if (assetRiskTolerance < data.assetRisk) revert Registry__AssetTooRisky();
        if (protocolRiskTolerance < data.protocolRisk) revert Registry__ProtocolTooRisky();
        PositionData memory positionData = getPositionIdToPositionData[positionId];
        return (positionData.adaptor, positionData.isDebt, positionData.adaptorData);
    }

    // ============================================ ADAPTOR LOGIC ============================================

    /**
     * @notice Attempted to trust an adaptor with non unique identifier.
     */
    error Registry__IdentifierNotUnique();

    /**
     * @notice Attempted to use an untrusted adaptor.
     */
    error Registry__AdaptorNotTrusted();

    /**
     * @notice Maps an adaptor address to bool indicating whether it has been set up in the registry.
     */
    mapping(address => bool) public isAdaptorTrusted;

    /**
     * @notice Maps an adaptors identier to bool, to track if the indentifier is unique wrt the registry.
     */
    mapping(bytes32 => bool) public isIdentifierUsed;

    /**
     * @notice Trust an adaptor to be used by cellars
     * @param adaptor address of the adaptor to trust
     * @param assetRisk the asset risk level associated with this adaptor
     * @param protocolRisk the protocol risk level associated with this adaptor
     */
    function trustAdaptor(
        address adaptor,
        uint128 assetRisk,
        uint128 protocolRisk
    ) external onlyOwner {
        bytes32 identifier = BaseAdaptor(adaptor).identifier();
        if (isIdentifierUsed[identifier]) revert Registry__IdentifierNotUnique();
        isAdaptorTrusted[adaptor] = true;
        isIdentifierUsed[identifier] = true;
        getAdaptorRiskData[adaptor] = RiskData({ assetRisk: assetRisk, protocolRisk: protocolRisk });
    }

    /**
     * @notice Called by Cellars to allow them to use new adaptors.
     * @param adaptor address of the adaptor to use
     * @param assetRiskTolerance asset risk tolerance of the caller
     * @param protocolRiskTolerance protocol risk tolerance of the cellar
     */
    function cellarSetupAdaptor(
        address adaptor,
        uint128 assetRiskTolerance,
        uint128 protocolRiskTolerance
    ) external view {
        RiskData memory data = getAdaptorRiskData[adaptor];
        if (assetRiskTolerance < data.assetRisk) revert Registry__AssetTooRisky();
        if (protocolRiskTolerance < data.protocolRisk) revert Registry__ProtocolTooRisky();
        if (!isAdaptorTrusted[adaptor]) revert Registry__AdaptorNotTrusted();
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { ERC4626, SafeTransferLib, Math, ERC20 } from "./ERC4626.sol";
import { Registry } from "src/Registry.sol";
import { PriceRouter } from "src/modules/price-router/PriceRouter.sol";
import { IGravity } from "src/interfaces/external/IGravity.sol";
import { Uint32Array } from "src/utils/Uint32Array.sol";
import { BaseAdaptor } from "src/modules/adaptors/BaseAdaptor.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { ERC721Holder } from "@openzeppelin/contracts/token/ERC721/utils/ERC721Holder.sol";
import { Owned } from "@solmate/auth/Owned.sol";

/**
 * @title Sommelier Cellar
 * @notice A composable ERC4626 that can use arbitrary DeFi assets/positions using adaptors.
 * @author crispymangoes
 */
contract Cellar is ERC4626, Owned, ERC721Holder {
    using Uint32Array for uint32[];
    using SafeTransferLib for ERC20;
    using Math for uint256;
    using Address for address;

    // ========================================= REENTRANCY GUARD =========================================
    /**
     * @notice `locked` is public, so that the state can be checked even during view function calls.
     */
    uint256 public locked = 1;

    modifier nonReentrant() {
        require(locked == 1, "REENTRANCY");

        locked = 2;

        _;

        locked = 1;
    }
    // ========================================= POSITIONS CONFIG =========================================

    /**
     * @notice Emitted when a position is added.
     * @param position id of position that was added
     * @param index index that position was added at
     */
    event PositionAdded(uint32 position, uint256 index);

    /**
     * @notice Emitted when a position is removed.
     * @param position id of position that was removed
     * @param index index that position was removed from
     */
    event PositionRemoved(uint32 position, uint256 index);

    /**
     * @notice Emitted when the positions at two indexes are swapped.
     * @param newPosition1 id of position (previously at index2) that replaced index1.
     * @param newPosition2 id of position (previously at index1) that replaced index2.
     * @param index1 index of first position involved in the swap
     * @param index2 index of second position involved in the swap.
     */
    event PositionSwapped(uint32 newPosition1, uint32 newPosition2, uint256 index1, uint256 index2);

    /**
     * @notice Attempted to add a position that is already being used.
     * @param position id of the position
     */
    error Cellar__PositionAlreadyUsed(uint32 position);

    /**
     * @notice Attempted to make an unused position the holding position.
     * @param position id of the position
     */
    error Cellar__PositionNotUsed(uint32 position);

    /**
     * @notice Attempted an action on a position that is required to be empty before the action can be performed.
     * @param position address of the non-empty position
     * @param sharesRemaining amount of shares remaining in the position
     */
    error Cellar__PositionNotEmpty(uint32 position, uint256 sharesRemaining);

    /**
     * @notice Attempted an operation with an asset that was different then the one expected.
     * @param asset address of the asset
     * @param expectedAsset address of the expected asset
     */
    error Cellar__AssetMismatch(address asset, address expectedAsset);

    /**
     * @notice Attempted to add a position when the position array is full.
     * @param maxPositions maximum number of positions that can be used
     */
    error Cellar__PositionArrayFull(uint256 maxPositions);

    /**
     * @notice Attempted to add a position, with mismatched debt.
     * @param position the posiiton id that was mismatched
     */
    error Cellar__DebtMismatch(uint32 position);

    /**
     * @notice Attempted to remove the Cellars holding position.
     */
    error Cellar__RemovingHoldingPosition();

    /**
     * @notice Attempted to add an invalid holding position.
     * @param positionId the id of the invalid position.
     */
    error Cellar__InvalidHoldingPosition(uint32 positionId);

    /**
     * @notice Array of uint32s made up of cellars credit positions Ids.
     */
    uint32[] public creditPositions;

    /**
     * @notice Array of uint32s made up of cellars debt positions Ids.
     */
    uint32[] public debtPositions;

    /**
     * @notice Tell whether a position is currently used.
     */
    mapping(uint256 => bool) public isPositionUsed;

    /**
     * @notice Get position data given position id.
     */
    mapping(uint32 => Registry.PositionData) public getPositionData;

    /**
     * @notice Get the ids of the credit positions currently used by the cellar.
     */
    function getCreditPositions() external view returns (uint32[] memory) {
        return creditPositions;
    }

    /**
     * @notice Get the ids of the debt positions currently used by the cellar.
     */
    function getDebtPositions() external view returns (uint32[] memory) {
        return debtPositions;
    }

    /**
     * @notice Maximum amount of positions a cellar can have in it's credit/debt arrays.
     */
    uint256 public constant MAX_POSITIONS = 16;

    /**
     * @notice Stores the index of the holding position in the creditPositions array.
     */
    uint32 public holdingPosition;

    /**
     * @notice Allows owner to change the holding position.
     */
    function setHoldingPosition(uint32 positionId) external onlyOwner {
        _setHoldingPosition(positionId);
    }

    function _setHoldingPosition(uint32 positionId) internal {
        if (!isPositionUsed[positionId]) revert Cellar__PositionNotUsed(positionId);
        if (_assetOf(positionId) != asset) revert Cellar__AssetMismatch(address(asset), address(_assetOf(positionId)));
        if (getPositionData[positionId].isDebt) revert Cellar__InvalidHoldingPosition(positionId);
        holdingPosition = positionId;
    }

    /**
     * @notice Insert a trusted position to the list of positions used by the cellar at a given index.
     * @param index index at which to insert the position
     * @param positionId id of position to add
     * @param configurationData data used to configure how the position behaves
     */
    function addPosition(
        uint32 index,
        uint32 positionId,
        bytes memory configurationData,
        bool inDebtArray
    ) external onlyOwner whenNotShutdown {
        _addPosition(index, positionId, configurationData, inDebtArray);
    }

    /**
     * @notice Internal function ise used by `addPosition` and initialize function.
     */
    function _addPosition(
        uint32 index,
        uint32 positionId,
        bytes memory configurationData,
        bool inDebtArray
    ) internal {
        // Check if position is already being used.
        if (isPositionUsed[positionId]) revert Cellar__PositionAlreadyUsed(positionId);

        // Grab position data from registry.
        (address adaptor, bool isDebt, bytes memory adaptorData) = registry.cellarAddPosition(
            positionId,
            assetRiskTolerance,
            protocolRiskTolerance
        );

        if (isDebt != inDebtArray) revert Cellar__DebtMismatch(positionId);

        // Copy position data from registry to here.
        getPositionData[positionId] = Registry.PositionData({
            adaptor: adaptor,
            isDebt: isDebt,
            adaptorData: adaptorData,
            configurationData: configurationData
        });

        if (isDebt) {
            if (debtPositions.length >= MAX_POSITIONS) revert Cellar__PositionArrayFull(MAX_POSITIONS);
            // Add new position at a specified index.
            debtPositions.add(index, positionId);
        } else {
            if (creditPositions.length >= MAX_POSITIONS) revert Cellar__PositionArrayFull(MAX_POSITIONS);
            // Add new position at a specified index.
            creditPositions.add(index, positionId);
        }

        isPositionUsed[positionId] = true;

        emit PositionAdded(positionId, index);
    }

    /**
     * @notice Remove the position at a given index from the list of positions used by the cellar.
     * @param index index at which to remove the position
     */
    function removePosition(uint32 index, bool inDebtArray) external onlyOwner {
        // Get position being removed.
        uint32 positionId = inDebtArray ? debtPositions[index] : creditPositions[index];

        if (positionId == holdingPosition) revert Cellar__RemovingHoldingPosition();

        // Only remove position if it is empty, and if it is not the holding position.
        uint256 positionBalance = _balanceOf(positionId);
        if (positionBalance > 0) revert Cellar__PositionNotEmpty(positionId, positionBalance);

        if (inDebtArray) {
            // Remove position at the given index.
            debtPositions.remove(index);
        } else {
            creditPositions.remove(index);
        }

        isPositionUsed[positionId] = false;
        delete getPositionData[positionId];

        emit PositionRemoved(positionId, index);
    }

    /**
     * @notice Swap the positions at two given indexes.
     * @param index1 index of first position to swap
     * @param index2 index of second position to swap
     * @param inDebtArray bool indicating to switch positions in the debt array, or the credit array.
     */
    function swapPositions(
        uint32 index1,
        uint32 index2,
        bool inDebtArray
    ) external onlyOwner {
        // Get the new positions that will be at each index.
        uint32 newPosition1;
        uint32 newPosition2;

        if (inDebtArray) {
            newPosition1 = debtPositions[index2];
            newPosition2 = debtPositions[index1];
            // Swap positions.
            (debtPositions[index1], debtPositions[index2]) = (newPosition1, newPosition2);
        } else {
            newPosition1 = creditPositions[index2];
            newPosition2 = creditPositions[index1];
            // Swap positions.
            (creditPositions[index1], creditPositions[index2]) = (newPosition1, newPosition2);
        }

        emit PositionSwapped(newPosition1, newPosition2, index1, index2);
    }

    // =============================================== FEES CONFIG ===============================================

    /**
     * @notice Emitted when platform fees is changed.
     * @param oldPlatformFee value platform fee was changed from
     * @param newPlatformFee value platform fee was changed to
     */
    event PlatformFeeChanged(uint64 oldPlatformFee, uint64 newPlatformFee);

    /**
     * @notice Emitted when strategist platform fee cut is changed.
     * @param oldPlatformCut value strategist platform fee cut was changed from
     * @param newPlatformCut value strategist platform fee cut was changed to
     */
    event StrategistPlatformCutChanged(uint64 oldPlatformCut, uint64 newPlatformCut);

    /**
     * @notice Emitted when strategists payout address is changed.
     * @param oldPayoutAddress value strategists payout address was changed from
     * @param newPayoutAddress value strategists payout address was changed to
     */
    event StrategistPayoutAddressChanged(address oldPayoutAddress, address newPayoutAddress);

    /**
     * @notice Attempted to change strategist fee cut with invalid value.
     */
    error Cellar__InvalidFeeCut();

    /**
     * @notice Attempted to change platform fee with invalid value.
     */
    error Cellar__InvalidFee();

    /**
     * @notice Data related to fees.
     * @param strategistPlatformCut Determines how much platform fees go to strategist.
     *                              This should be a value out of 1e18 (ie. 1e18 represents 100%, 0 represents 0%).
     * @param platformFee The percentage of total assets accrued as platform fees over a year.
                          This should be a value out of 1e18 (ie. 1e18 represents 100%, 0 represents 0%).
     * @param strategistPayoutAddress Address to send the strategists fee shares.
     */
    struct FeeData {
        uint64 strategistPlatformCut;
        uint64 platformFee;
        uint64 lastAccrual;
        address strategistPayoutAddress;
    }

    /**
     * @notice Stores all fee data for cellar.
     */
    FeeData public feeData =
        FeeData({
            strategistPlatformCut: 0.75e18,
            platformFee: 0.01e18,
            lastAccrual: 0,
            strategistPayoutAddress: address(0)
        });

    /**
     * @notice Sets the max possible performance fee for this cellar.
     */
    uint64 public constant MAX_PLATFORM_FEE = 0.2e18;

    /**
     * @notice Sets the max possible fee cut for this cellar.
     */
    uint64 public constant MAX_FEE_CUT = 1e18;

    /**
     * @notice Set the percentage of platform fees accrued over a year.
     * @param newPlatformFee value out of 1e18 that represents new platform fee percentage
     */
    function setPlatformFee(uint64 newPlatformFee) external onlyOwner {
        if (newPlatformFee > MAX_PLATFORM_FEE) revert Cellar__InvalidFee();
        emit PlatformFeeChanged(feeData.platformFee, newPlatformFee);

        feeData.platformFee = newPlatformFee;
    }

    /**
     * @notice Sets the Strategists cut of platform fees
     * @param cut the platform cut for the strategist
     */
    function setStrategistPlatformCut(uint64 cut) external onlyOwner {
        if (cut > MAX_FEE_CUT) revert Cellar__InvalidFeeCut();
        emit StrategistPlatformCutChanged(feeData.strategistPlatformCut, cut);

        feeData.strategistPlatformCut = cut;
    }

    /**
     * @notice Sets the Strategists payout address
     * @param payout the new strategist payout address
     */
    function setStrategistPayoutAddress(address payout) external onlyOwner {
        emit StrategistPayoutAddressChanged(feeData.strategistPayoutAddress, payout);

        feeData.strategistPayoutAddress = payout;
    }

    // =========================================== EMERGENCY LOGIC ===========================================

    /**
     * @notice Emitted when cellar emergency state is changed.
     * @param isShutdown whether the cellar is shutdown
     */
    event ShutdownChanged(bool isShutdown);

    /**
     * @notice Attempted action was prevented due to contract being shutdown.
     */
    error Cellar__ContractShutdown();

    /**
     * @notice Attempted action was prevented due to contract not being shutdown.
     */
    error Cellar__ContractNotShutdown();

    /**
     * @notice Whether or not the contract is shutdown in case of an emergency.
     */
    bool public isShutdown;

    /**
     * @notice Prevent a function from being called during a shutdown.
     */
    modifier whenNotShutdown() {
        if (isShutdown) revert Cellar__ContractShutdown();

        _;
    }

    /**
     * @notice Shutdown the cellar. Used in an emergency or if the cellar has been deprecated.
     * @dev In the case where
     */
    function initiateShutdown() external whenNotShutdown onlyOwner {
        isShutdown = true;

        emit ShutdownChanged(true);
    }

    /**
     * @notice Restart the cellar.
     */
    function liftShutdown() external onlyOwner {
        if (!isShutdown) revert Cellar__ContractNotShutdown();
        isShutdown = false;

        emit ShutdownChanged(false);
    }

    // =========================================== CONSTRUCTOR ===========================================

    /**
     * @notice Id to get the gravity bridge from the registry.
     */
    uint256 public constant GRAVITY_BRIDGE_REGISTRY_SLOT = 0;

    /**
     * @notice Id to get the price router from the registry.
     */
    uint256 public constant PRICE_ROUTER_REGISTRY_SLOT = 2;

    /**
     * @notice Address of the platform's registry contract. Used to get the latest address of modules.
     */
    Registry public registry;

    /**
     * @notice Determines this cellars risk tolerance in regards to assets it is exposed to.
     * @dev 0: safest
     *      type(uint128).max: no restrictions
     */
    uint128 public assetRiskTolerance;

    /**
     * @notice Determines this cellars risk tolerance in regards to protocols it uses.
     * @dev 0: safest
     *      type(uint128).max: no restrictions
     */
    uint128 public protocolRiskTolerance;

    /**
     * @dev Owner should be set to the Gravity Bridge, which relays instructions from the Steward
     *      module to the cellars.
     *      https://github.com/PeggyJV/steward
     *      https://github.com/cosmos/gravity-bridge/blob/main/solidity/contracts/Gravity.sol
     * @param _registry address of the platform's registry contract
     * @param _asset address of underlying token used for the for accounting, depositing, and withdrawing
     * @param _name name of this cellar's share token
     * @param _symbol symbol of this cellar's share token
     * @param params abi encode values.
     *               -  _creditPositions ids of the credit positions to initialize the cellar with
     *               -  _debtPositions ids of the credit positions to initialize the cellar with
     *               -  _creditConfigurationData configuration data for each position
     *               -  _debtConfigurationData configuration data for each position
     *               -  _holdingIndex the index in _creditPositions to use as the holding position.
     *               -  _strategistPayout the address to send the strategists fee shares.
     *               -  _assetRiskTolerance this cellars risk tolerance for assets it is exposed to
     *               -  _protocolRiskTolerance this cellars risk tolerance for protocols it will use
     */
    constructor(
        Registry _registry,
        ERC20 _asset,
        string memory _name,
        string memory _symbol,
        bytes memory params
    ) ERC4626(_asset, _name, _symbol, 18) Owned(_registry.getAddress(GRAVITY_BRIDGE_REGISTRY_SLOT)) {
        registry = _registry;

        {
            (
                uint32[] memory _creditPositions,
                uint32[] memory _debtPositions,
                bytes[] memory _creditConfigurationData,
                bytes[] memory _debtConfigurationData,
                uint32 _holdingPosition
            ) = abi.decode(params, (uint32[], uint32[], bytes[], bytes[], uint8));

            // Initialize positions.
            for (uint32 i; i < _creditPositions.length; ++i) {
                _addPosition(i, _creditPositions[i], _creditConfigurationData[i], false);
            }
            for (uint32 i; i < _debtPositions.length; ++i) {
                _addPosition(i, _debtPositions[i], _debtConfigurationData[i], true);
            }
            // This check allows us to deploy an implementation contract.
            /// @dev No cellars will be deployed with a zero length credit positions array.
            if (_creditPositions.length > 0) _setHoldingPosition(_holdingPosition);
        }

        // Initialize last accrual timestamp to time that cellar was created, otherwise the first
        // `accrue` will take platform fees from 1970 to the time it is called.
        feeData.lastAccrual = uint64(block.timestamp);

        (, , , , , address _strategistPayout, uint128 _assetRiskTolerance, uint128 _protocolRiskTolerance) = abi.decode(
            params,
            (uint32[], uint32[], bytes[], bytes[], uint8, address, uint128, uint128)
        );

        feeData.strategistPayoutAddress = _strategistPayout;

        assetRiskTolerance = _assetRiskTolerance;
        protocolRiskTolerance = _protocolRiskTolerance;
    }

    // =========================================== CORE LOGIC ===========================================

    /**
     * @notice Emitted when share locking period is changed.
     * @param oldPeriod the old locking period
     * @param newPeriod the new locking period
     */
    event ShareLockingPeriodChanged(uint256 oldPeriod, uint256 newPeriod);

    /**
     * @notice Attempted an action with zero shares.
     */
    error Cellar__ZeroShares();

    /**
     * @notice Attempted an action with zero assets.
     */
    error Cellar__ZeroAssets();

    /**
     * @notice Withdraw did not withdraw all assets.
     * @param assetsOwed the remaining assets owed that were not withdrawn.
     */
    error Cellar__IncompleteWithdraw(uint256 assetsOwed);

    /**
     * @notice Attempted to withdraw an illiquid position.
     * @param illiquidPosition the illiquid position.
     */
    error Cellar__IlliquidWithdraw(address illiquidPosition);

    /**
     * @notice Attempted to set `shareLockPeriod` to an invalid number.
     */
    error Cellar__InvalidShareLockPeriod();

    /**
     * @notice Attempted to burn shares when they are locked.
     * @param timeSharesAreUnlocked time when caller can transfer/redeem shares
     * @param currentBlock the current block number.
     */
    error Cellar__SharesAreLocked(uint256 timeSharesAreUnlocked, uint256 currentBlock);

    /**
     * @notice Attempted deposit on behalf of a user without being approved.
     */
    error Cellar__NotApprovedToDepositOnBehalf(address depositor);

    /**
     * @notice Shares must be locked for at least 5 minutes after minting.
     */
    uint256 public constant MINIMUM_SHARE_LOCK_PERIOD = 5 * 60;

    /**
     * @notice Shares can be locked for at most 2 days after minting.
     */
    uint256 public constant MAXIMUM_SHARE_LOCK_PERIOD = 2 days;

    /**
     * @notice After deposits users must wait `shareLockPeriod` time before being able to transfer or withdraw their shares.
     */
    uint256 public shareLockPeriod = MAXIMUM_SHARE_LOCK_PERIOD;

    /**
     * @notice mapping that stores every users last time stamp they minted shares.
     */
    mapping(address => uint256) public userShareLockStartTime;

    /**
     * @notice Allows share lock period to be updated.
     * @param newLock the new lock period
     */
    function setShareLockPeriod(uint256 newLock) external onlyOwner {
        if (newLock < MINIMUM_SHARE_LOCK_PERIOD || newLock > MAXIMUM_SHARE_LOCK_PERIOD)
            revert Cellar__InvalidShareLockPeriod();
        uint256 oldLockingPeriod = shareLockPeriod;
        shareLockPeriod = newLock;
        emit ShareLockingPeriodChanged(oldLockingPeriod, newLock);
    }

    /**
     * @notice helper function that checks enough time has passed to unlock shares.
     * @param owner the address of the user to check
     */
    function _checkIfSharesLocked(address owner) internal view {
        uint256 lockTime = userShareLockStartTime[owner];
        if (lockTime != 0) {
            uint256 timeSharesAreUnlocked = lockTime + shareLockPeriod;
            if (timeSharesAreUnlocked > block.timestamp)
                revert Cellar__SharesAreLocked(timeSharesAreUnlocked, block.timestamp);
        }
    }

    /**
     * @notice Override `transfer` to add share lock check.
     */
    function transfer(address to, uint256 amount) public override returns (bool) {
        _checkIfSharesLocked(msg.sender);
        return super.transfer(to, amount);
    }

    /**
     * @notice Override `transferFrom` to add share lock check.
     */
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public override returns (bool) {
        _checkIfSharesLocked(from);
        return super.transferFrom(from, to, amount);
    }

    /**
     * @notice Attempted deposit more than the max deposit.
     * @param assets the assets user attempted to deposit
     * @param maxDeposit the max assets that can be deposited
     */
    error Cellar__DepositRestricted(uint256 assets, uint256 maxDeposit);

    /**
     * @notice called at the beginning of deposit.
     * @param assets amount of assets deposited by user.
     * @param receiver address receiving the shares.
     */
    function beforeDeposit(
        uint256 assets,
        uint256,
        address receiver
    ) internal view override whenNotShutdown {
        if (msg.sender != receiver) {
            if (!registry.approvedForDepositOnBehalf(msg.sender))
                revert Cellar__NotApprovedToDepositOnBehalf(msg.sender);
        }
        uint256 maxAssets = maxDeposit(receiver);
        if (assets > maxAssets) revert Cellar__DepositRestricted(assets, maxAssets);
    }

    /**
     * @notice called at the end of deposit.
     * @param assets amount of assets deposited by user.
     */
    function afterDeposit(
        uint256 assets,
        uint256,
        address receiver
    ) internal override {
        _depositTo(holdingPosition, assets);
        userShareLockStartTime[receiver] = block.timestamp;
    }

    /**
     * @notice called at the beginning of withdraw.
     */
    function beforeWithdraw(
        uint256,
        uint256,
        address,
        address owner
    ) internal view override {
        // Make sure users shares are not locked.
        _checkIfSharesLocked(owner);
    }

    function _enter(
        uint256 assets,
        uint256 shares,
        address receiver
    ) internal {
        beforeDeposit(assets, shares, receiver);

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares, receiver);
    }

    /**
     * @notice Deposits assets into the cellar, and returns shares to receiver.
     * @param assets amount of assets deposited by user.
     * @param receiver address to receive the shares.
     * @return shares amount of shares given for deposit.
     */
    function deposit(uint256 assets, address receiver) public override nonReentrant returns (uint256 shares) {
        // Use `_accounting` instead of totalAssets bc re-entrancy is already checked in this function.
        uint256 _totalAssets = _accounting(false);

        // Check for rounding error since we round down in previewDeposit.
        if ((shares = _convertToShares(assets, _totalAssets)) == 0) revert Cellar__ZeroShares();

        _enter(assets, shares, receiver);
    }

    /**
     * @notice Mints shares from the cellar, and returns shares to receiver.
     * @param shares amount of shares requested by user.
     * @param receiver address to receive the shares.
     * @return assets amount of assets deposited into the cellar.
     */
    function mint(uint256 shares, address receiver) public override nonReentrant returns (uint256 assets) {
        // Use `_accounting` instead of totalAssets bc re-entrancy is already checked in this function.
        uint256 _totalAssets = _accounting(false);

        // previewMint rounds up, but initial mint could return zero assets, so check for rounding error.
        if ((assets = _previewMint(shares, _totalAssets)) == 0) revert Cellar__ZeroAssets();

        _enter(assets, shares, receiver);
    }

    function _exit(
        uint256 assets,
        uint256 shares,
        address receiver,
        address owner
    ) internal {
        beforeWithdraw(assets, shares, receiver, owner);

        if (msg.sender != owner) {
            uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals.

            if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares;
        }

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);
        _withdrawInOrder(assets, receiver);

        /// @notice `afterWithdraw` is currently not used.
        // afterWithdraw(assets, shares, receiver, owner);
    }

    /**
     * @notice Withdraw assets from the cellar by redeeming shares.
     * @dev Unlike conventional ERC4626 contracts, this may not always return one asset to the receiver.
     *      Since there are no swaps involved in this function, the receiver may receive multiple
     *      assets. The value of all the assets returned will be equal to the amount defined by
     *      `assets` denominated in the `asset` of the cellar (eg. if `asset` is USDC and `assets`
     *      is 1000, then the receiver will receive $1000 worth of assets in either one or many
     *      tokens).
     * @param assets equivalent value of the assets withdrawn, denominated in the cellar's asset
     * @param receiver address that will receive withdrawn assets
     * @param owner address that owns the shares being redeemed
     * @return shares amount of shares redeemed
     */
    function withdraw(
        uint256 assets,
        address receiver,
        address owner
    ) public override nonReentrant returns (uint256 shares) {
        // Use `_accounting` instead of totalAssets bc re-entrancy is already checked in this function.
        uint256 _totalAssets = _accounting(false);

        // No need to check for rounding error, `previewWithdraw` rounds up.
        shares = _previewWithdraw(assets, _totalAssets);

        _exit(assets, shares, receiver, owner);
    }

    /**
     * @notice Redeem shares to withdraw assets from the cellar.
     * @dev Unlike conventional ERC4626 contracts, this may not always return one asset to the receiver.
     *      Since there are no swaps involved in this function, the receiver may receive multiple
     *      assets. The value of all the assets returned will be equal to the amount defined by
     *      `assets` denominated in the `asset` of the cellar (eg. if `asset` is USDC and `assets`
     *      is 1000, then the receiver will receive $1000 worth of assets in either one or many
     *      tokens).
     * @param shares amount of shares to redeem
     * @param receiver address that will receive withdrawn assets
     * @param owner address that owns the shares being redeemed
     * @return assets equivalent value of the assets withdrawn, denominated in the cellar's asset
     */
    function redeem(
        uint256 shares,
        address receiver,
        address owner
    ) public override nonReentrant returns (uint256 assets) {
        // Use `_accounting` instead of totalAssets bc re-entrancy is already checked in this function.
        uint256 _totalAssets = _accounting(false);

        // Check for rounding error since we round down in previewRedeem.
        if ((assets = _convertToAssets(shares, _totalAssets)) == 0) revert Cellar__ZeroAssets();

        _exit(assets, shares, receiver, owner);
    }

    /**
     * @notice Struct used in `_withdrawInOrder` in order to hold multiple pricing values in a single variable.
     * @dev Prevents stack too deep errors.
     */
    struct WithdrawPricing {
        uint256 priceBaseUSD;
        uint256 oneBase;
        uint256 priceQuoteUSD;
        uint256 oneQuote;
    }

    /**
     * @notice Multipler used to insure calculations use very high precision.
     */
    uint256 private constant PRECISION_MULTIPLIER = 1e18;

    /**
     * @dev Withdraw from positions in the order defined by `positions`.
     * @param assets the amount of assets to withdraw from cellar
     * @param receiver the address to sent withdrawn assets to
     * @dev Only loop through credit array because debt can not be withdraw by users.
     */
    function _withdrawInOrder(uint256 assets, address receiver) internal {
        // Get the price router.
        PriceRouter priceRouter = PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT));
        // Save asset price in USD, and decimals to reduce external calls.
        WithdrawPricing memory pricingInfo;
        pricingInfo.priceQuoteUSD = priceRouter.getPriceInUSD(asset);
        pricingInfo.oneQuote = 10**asset.decimals();
        uint256 creditLength = creditPositions.length;
        for (uint256 i; i < creditLength; ++i) {
            uint32 position = creditPositions[i];
            uint256 withdrawableBalance = _withdrawableFrom(position);
            // Move on to next position if this one is empty.
            if (withdrawableBalance == 0) continue;
            ERC20 positionAsset = _assetOf(position);

            pricingInfo.priceBaseUSD = priceRouter.getPriceInUSD(positionAsset);
            pricingInfo.oneBase = 10**positionAsset.decimals();
            uint256 totalWithdrawableBalanceInAssets;
            {
                uint256 withdrawableBalanceInUSD = (PRECISION_MULTIPLIER * withdrawableBalance).mulDivDown(
                    pricingInfo.priceBaseUSD,
                    pricingInfo.oneBase
                );
                totalWithdrawableBalanceInAssets = withdrawableBalanceInUSD.mulDivDown(
                    pricingInfo.oneQuote,
                    pricingInfo.priceQuoteUSD
                );
                totalWithdrawableBalanceInAssets = totalWithdrawableBalanceInAssets / PRECISION_MULTIPLIER;
            }

            // We want to pull as much as we can from this position, but no more than needed.
            uint256 amount;

            if (totalWithdrawableBalanceInAssets > assets) {
                // Convert assets into position asset.
                uint256 assetsInUSD = (PRECISION_MULTIPLIER * assets).mulDivDown(
                    pricingInfo.priceQuoteUSD,
                    pricingInfo.oneQuote
                );
                amount = assetsInUSD.mulDivDown(pricingInfo.oneBase, pricingInfo.priceBaseUSD);
                amount = amount / PRECISION_MULTIPLIER;
                assets = 0;
            } else {
                amount = withdrawableBalance;
                assets = assets - totalWithdrawableBalanceInAssets;
            }

            // Withdraw from position.
            _withdrawFrom(position, amount, receiver);

            // Stop if no more assets to withdraw.
            if (assets == 0) break;
        }
        // If withdraw did not remove all assets owed, revert.
        if (assets > 0) revert Cellar__IncompleteWithdraw(assets);
    }

    // ========================================= ACCOUNTING LOGIC =========================================

    /**
     * @notice Internal accounting function that can report total assets, or total assets withdrawable.
     * @param reportWithdrawable if true, then the withdrawable total assets is reported,
     *                           if false, then the total assets is reported
     */
    function _accounting(bool reportWithdrawable) internal view returns (uint256 assets) {
        uint256 numOfCreditPositions = creditPositions.length;
        ERC20[] memory creditAssets = new ERC20[](numOfCreditPositions);
        uint256[] memory creditBalances = new uint256[](numOfCreditPositions);
        PriceRouter priceRouter = PriceRouter(registry.getAddress(PRICE_ROUTER_REGISTRY_SLOT));
        // If we just need the withdrawable, then query credit array value.
        if (reportWithdrawable) {
            for (uint256 i; i < numOfCreditPositions; ++i) {
                uint32 position = creditPositions[i];
                // If the withdrawable balance is zero there is no point to query the asset since a zero balance has zero value.
                if ((creditBalances[i] = _withdrawableFrom(position)) == 0) continue;
                creditAssets[i] = _assetOf(position);
            }
            assets = priceRouter.getValues(creditAssets, creditBalances, asset);
        } else {
            uint256 numOfDebtPositions = debtPositions.length;
            ERC20[] memory debtAssets = new ERC20[](numOfDebtPositions);
            uint256[] memory debtBalances = new uint256[](numOfDebtPositions);
            for (uint256 i; i < numOfCreditPositions; ++i) {
                uint32 position = creditPositions[i];
                // If the balance is zero there is no point to query the asset since a zero balance has zero value.
                if ((creditBalances[i] = _balanceOf(position)) == 0) continue;
                creditAssets[i] = _assetOf(position);
            }
            for (uint256 i; i < numOfDebtPositions; ++i) {
                uint32 position = debtPositions[i];
                // If the balance is zero there is no point to query the asset since a zero balance has zero value.
                if ((debtBalances[i] = _balanceOf(position)) == 0) continue;
                debtAssets[i] = _assetOf(position);
            }
            assets = priceRouter.getValuesDelta(creditAssets, creditBalances, debtAssets, debtBalances, asset);
        }
    }

    /**
     * @notice The total amount of assets in the cellar.
     * @dev EIP4626 states totalAssets needs to be inclusive of fees.
     * Since performance fees mint shares, total assets remains unchanged,
     * so this implementation is inclusive of fees even though it does not explicitly show it.
     * @dev EIP4626 states totalAssets must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     * @dev Run a re-entrancy check because totalAssets can be wrong if re-entering from deposit/withdraws.
     */
    function totalAssets() public view override returns (uint256 assets) {
        require(locked == 1, "REENTRANCY");
        assets = _accounting(false);
    }

    /**
     * @notice The total amount of withdrawable assets in the cellar.
     * @dev Run a re-entrancy check because totalAssetsWithdrawable can be wrong if re-entering from deposit/withdraws.
     */
    function totalAssetsWithdrawable() public view returns (uint256 assets) {
        require(locked == 1, "REENTRANCY");
        assets = _accounting(true);
    }

    /**
     * @notice The amount of assets that the cellar would exchange for the amount of shares provided.
     * @param shares amount of shares to convert
     * @return assets the shares can be exchanged for
     */
    function convertToAssets(uint256 shares) public view override returns (uint256 assets) {
        assets = _convertToAssets(shares, totalAssets());
    }

    /**
     * @notice The amount of shares that the cellar would exchange for the amount of assets provided.
     * @param assets amount of assets to convert
     * @return shares the assets can be exchanged for
     */
    function convertToShares(uint256 assets) public view override returns (uint256 shares) {
        shares = _convertToShares(assets, totalAssets());
    }

    /**
     * @notice Simulate the effects of minting shares at the current block, given current on-chain conditions.
     * @param shares amount of shares to mint
     * @return assets that will be deposited
     */
    function previewMint(uint256 shares) public view override returns (uint256 assets) {
        uint256 _totalAssets = totalAssets();
        assets = _previewMint(shares, _totalAssets);
    }

    /**
     * @notice Simulate the effects of withdrawing assets at the current block, given current on-chain conditions.
     * @param assets amount of assets to withdraw
     * @return shares that will be redeemed
     */
    function previewWithdraw(uint256 assets) public view override returns (uint256 shares) {
        uint256 _totalAssets = totalAssets();
        shares = _previewWithdraw(assets, _totalAssets);
    }

    /**
     * @notice Simulate the effects of depositing assets at the current block, given current on-chain conditions.
     * @param assets amount of assets to deposit
     * @return shares that will be minted
     */
    function previewDeposit(uint256 assets) public view override returns (uint256 shares) {
        uint256 _totalAssets = totalAssets();
        shares = _convertToShares(assets, _totalAssets);
    }

    /**
     * @notice Simulate the effects of redeeming shares at the current block, given current on-chain conditions.
     * @param shares amount of shares to redeem
     * @return assets that will be returned
     */
    function previewRedeem(uint256 shares) public view override returns (uint256 assets) {
        uint256 _totalAssets = totalAssets();
        assets = _convertToAssets(shares, _totalAssets);
    }

    /**
     * @notice Finds the max amount of value an `owner` can remove from the cellar.
     * @param owner address of the user to find max value.
     * @param inShares if false, then returns value in terms of assets
     *                 if true then returns value in terms of shares
     */
    function _findMax(address owner, bool inShares) internal view returns (uint256 maxOut) {
        // Check if owner shares are locked, return 0 if so.
        uint256 lockTime = userShareLockStartTime[owner];
        if (lockTime != 0) {
            uint256 timeSharesAreUnlocked = lockTime + shareLockPeriod;
            if (timeSharesAreUnlocked > block.timestamp) return 0;
        }
        // Get amount of assets to withdraw.
        uint256 _totalAssets = _accounting(false);
        uint256 assets = _convertToAssets(balanceOf[owner], _totalAssets);

        uint256 withdrawable = _accounting(true);
        maxOut = assets <= withdrawable ? assets : withdrawable;

        if (inShares) maxOut = _convertToShares(maxOut, _totalAssets);
        // else leave maxOut in terms of assets.
    }

    /**
     * @notice Returns the max amount withdrawable by a user inclusive of performance fees
     * @dev EIP4626 states maxWithdraw must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     * @param owner address to check maxWithdraw of.
     * @return the max amount of assets withdrawable by `owner`.
     */
    function maxWithdraw(address owner) public view override returns (uint256) {
        require(locked == 1, "REENTRANCY");
        return _findMax(owner, false);
    }

    /**
     * @notice Returns the max amount shares redeemable by a user
     * @dev EIP4626 states maxRedeem must not revert, but it is possible for `totalAssets` to revert
     * so it does NOT conform to ERC4626 standards.
     * @param owner address to check maxRedeem of.
     * @return the max amount of shares redeemable by `owner`.
     */
    function maxRedeem(address owner) public view override returns (uint256) {
        require(locked == 1, "REENTRANCY");
        return _findMax(owner, true);
    }

    /**
     * @dev Used to more efficiently convert amount of shares to assets using a stored `totalAssets` value.
     */
    function _convertToAssets(uint256 shares, uint256 _totalAssets) internal view returns (uint256 assets) {
        uint256 totalShares = totalSupply;

        assets = totalShares == 0
            ? shares.changeDecimals(18, asset.decimals())
            : shares.mulDivDown(_totalAssets, totalShares);
    }

    /**
     * @dev Used to more efficiently convert amount of assets to shares using a stored `totalAssets` value.
     */
    function _convertToShares(uint256 assets, uint256 _totalAssets) internal view returns (uint256 shares) {
        uint256 totalShares = totalSupply;

        shares = totalShares == 0
            ? assets.changeDecimals(asset.decimals(), 18)
            : assets.mulDivDown(totalShares, _totalAssets);
    }

    /**
     * @dev Used to more efficiently simulate minting shares using a stored `totalAssets` value.
     */
    function _previewMint(uint256 shares, uint256 _totalAssets) internal view returns (uint256 assets) {
        uint256 totalShares = totalSupply;

        assets = totalShares == 0
            ? shares.changeDecimals(18, asset.decimals())
            : shares.mulDivUp(_totalAssets, totalShares);
    }

    /**
     * @dev Used to more efficiently simulate withdrawing assets using a stored `totalAssets` value.
     */
    function _previewWithdraw(uint256 assets, uint256 _totalAssets) internal view returns (uint256 shares) {
        uint256 totalShares = totalSupply;

        shares = totalShares == 0
            ? assets.changeDecimals(asset.decimals(), 18)
            : assets.mulDivUp(totalShares, _totalAssets);
    }

    // =========================================== ADAPTOR LOGIC ===========================================

    /**
     * @notice Emitted on when the rebalance deviation is changed.
     * @param oldDeviation the old rebalance deviation
     * @param newDeviation the new rebalance deviation
     */
    event RebalanceDeviationChanged(uint256 oldDeviation, uint256 newDeviation);

    /**
     * @notice totalAssets deviated outside the range set by `allowedRebalanceDeviation`.
     * @param assets the total assets in the cellar
     * @param min the minimum allowed assets
     * @param max the maximum allowed assets
     */
    error Cellar__TotalAssetDeviatedOutsideRange(uint256 assets, uint256 min, uint256 max);

    /**
     * @notice Total shares in a cellar changed when they should stay constant.
     * @param current the current amount of total shares
     * @param expected the expected amount of total shares
     */
    error Cellar__TotalSharesMustRemainConstant(uint256 current, uint256 expected);

    /**
     * @notice Total shares in a cellar changed when they should stay constant.
     * @param requested the requested rebalance  deviation
     * @param max the max rebalance deviation.
     */
    error Cellar__InvalidRebalanceDeviation(uint256 requested, uint256 max);

    /**
     * @notice Strategist attempted to use an adaptor that was not set up to be used with this cellar.
     * @param adaptor the adaptor address that is not set up
     */
    error Cellar__AdaptorNotSetUp(address adaptor);

    /**
     * @notice Maps an address to a bool indicating whether or not an adaptor
     *         has been set up to be used with this cellar.
     */
    mapping(address => bool) public isAdaptorSetup;

    /**
     * @notice Allows owner to add new adaptors for the cellar to use.
     */
    function setupAdaptor(address _adaptor) external onlyOwner {
        // Following call reverts if adaptor does not exist, or if it does not meet cellars risk appetite.
        registry.cellarSetupAdaptor(_adaptor, assetRiskTolerance, protocolRiskTolerance);
        isAdaptorSetup[_adaptor] = true;
    }

    /**
     * @notice Stores the max possible rebalance deviation for this cellar.
     */
    uint64 public constant MAX_REBALANCE_DEVIATION = 0.1e18;

    /**
     * @notice The percent the total assets of a cellar may deviate during a `callOnAdaptor`(rebalance) call.
     */
    uint256 public allowedRebalanceDeviation = 0.0003e18;

    /**
     * @notice Allows governance to change this cellars rebalance deviation.
     * @param newDeviation the new rebalance deviation value.
     */
    function setRebalanceDeviation(uint256 newDeviation) external onlyOwner {
        if (newDeviation > MAX_REBALANCE_DEVIATION)
            revert Cellar__InvalidRebalanceDeviation(newDeviation, MAX_REBALANCE_DEVIATION);

        uint256 oldDeviation = allowedRebalanceDeviation;
        allowedRebalanceDeviation = newDeviation;

        emit RebalanceDeviationChanged(oldDeviation, newDeviation);
    }

    // Set to true before any adaptor calls are made.
    /**
     * @notice This bool is used to stop strategists from abusing Base Adaptor functions(deposit/withdraw).
     */
    bool public blockExternalReceiver;

    /**
     * @notice Struct used to make calls to adaptors.
     * @param adaptor the address of the adaptor to make calls to
     * @param the abi encoded function calls to make to the `adaptor`
     */
    struct AdaptorCall {
        address adaptor;
        bytes[] callData;
    }

    /**
     * @notice Allows strategists to manage their Cellar using arbitrary logic calls to adaptors.
     * @dev There are several safety checks in this function to prevent strategists from abusing it.
     *      - `blockExternalReceiver`
     *      - `totalAssets` must not change by much
     *      - `totalShares` must remain constant
     *      - adaptors must be set up to be used with this cellar
     * @dev Since `totalAssets` is allowed to deviate slightly, strategists could abuse this by sending
     *      multiple `callOnAdaptor` calls rapidly, to gradually change the share price.
     *      To mitigate this, rate limiting will be put in place on the Sommelier side.
     */
    function callOnAdaptor(AdaptorCall[] memory data) external onlyOwner whenNotShutdown nonReentrant {
        blockExternalReceiver = true;

        // Record `totalAssets` and `totalShares` before making any external calls.
        uint256 minimumAllowedAssets;
        uint256 maximumAllowedAssets;
        uint256 totalShares;
        {
            uint256 assetsBeforeAdaptorCall = _accounting(false);
            minimumAllowedAssets = assetsBeforeAdaptorCall.mulDivUp((1e18 - allowedRebalanceDeviation), 1e18);
            maximumAllowedAssets = assetsBeforeAdaptorCall.mulDivUp((1e18 + allowedRebalanceDeviation), 1e18);
            totalShares = totalSupply;
        }

        // Run all adaptor calls.
        for (uint8 i = 0; i < data.length; ++i) {
            address adaptor = data[i].adaptor;
            if (!isAdaptorSetup[adaptor]) revert Cellar__AdaptorNotSetUp(adaptor);
            for (uint8 j = 0; j < data[i].callData.length; j++) {
                adaptor.functionDelegateCall(data[i].callData[j]);
            }
        }

        // After making every external call, check that the totalAssets haas not deviated significantly, and that totalShares is the same.
        uint256 assets = _accounting(false);
        if (assets < minimumAllowedAssets || assets > maximumAllowedAssets) {
            revert Cellar__TotalAssetDeviatedOutsideRange(assets, minimumAllowedAssets, maximumAllowedAssets);
        }
        if (totalShares != totalSupply) revert Cellar__TotalSharesMustRemainConstant(totalSupply, totalShares);

        blockExternalReceiver = false;
    }

    // ========================================= Aave Flash Loan Support =========================================

    /**
     * @notice External contract attempted to initiate a flash loan.
     */
    error Cellar__ExternalInitiator();

    /**
     * @notice executeOperation was not called by the Aave Pool.
     */
    error Cellar__CallerNotAavePool();

    /**
     * @notice The Aave V2 Pool contract on Ethereum Mainnet.
     */
    address public aavePool = 0x7d2768dE32b0b80b7a3454c06BdAc94A69DDc7A9;

    /**
     * @notice Allows strategist to utilize Aave V2 flashloans while rebalancing the cellar.
     */
    function executeOperation(
        address[] calldata assets,
        uint256[] calldata amounts,
        uint256[] calldata premiums,
        address initiator,
        bytes calldata params
    ) external returns (bool) {
        if (initiator != address(this)) revert Cellar__ExternalInitiator();
        if (msg.sender != aavePool) revert Cellar__CallerNotAavePool();

        AdaptorCall[] memory data = abi.decode(params, (AdaptorCall[]));

        // Run all adaptor calls.
        for (uint8 i = 0; i < data.length; ++i) {
            address adaptor = data[i].adaptor;
            if (!isAdaptorSetup[adaptor]) revert Cellar__AdaptorNotSetUp(adaptor);
            for (uint8 j = 0; j < data[i].callData.length; j++) {
                adaptor.functionDelegateCall(data[i].callData[j]);
            }
        }

        // Approve pool to repay all debt.
        for (uint256 i = 0; i < amounts.length; ++i) {
            ERC20(assets[i]).safeApprove(aavePool, (amounts[i] + premiums[i]));
        }

        return true;
    }

    // ============================================ LIMITS LOGIC ============================================

    /**
     * @notice Total amount of assets that can be deposited for a user.
     * @return assets maximum amount of assets that can be deposited
     */
    function maxDeposit(address) public view override returns (uint256) {
        if (isShutdown) return 0;

        return type(uint256).max;
    }

    /**
     * @notice Total amount of shares that can be minted for a user.
     * @return shares maximum amount of shares that can be minted
     */
    function maxMint(address) public view override returns (uint256) {
        if (isShutdown) return 0;

        return type(uint256).max;
    }

    // ========================================= FEES LOGIC =========================================

    /**
     * @notice Attempted to send fee shares to strategist payout address, when address is not set.
     */
    error Cellar__PayoutNotSet();

    /**
     * @dev Calculate the amount of fees to mint such that value of fees after minting is not diluted.
     */
    function _convertToFees(uint256 feesInShares) internal view returns (uint256 fees) {
        // Saves an SLOAD.
        uint256 totalShares = totalSupply;

        // Get the amount of fees to mint. Without this, the value of fees minted would be slightly
        // diluted because total shares increased while total assets did not. This counteracts that.
        if (totalShares > feesInShares) {
            // Denominator is greater than zero
            uint256 denominator = totalShares - feesInShares;
            fees = feesInShares.mulDivUp(totalShares, denominator);
        }
        // If denominator is less than or equal to zero, `fees` should be zero.
    }

    /**
     * @notice Emitted when platform fees are send to the Sommelier chain.
     * @param feesInSharesRedeemed amount of fees redeemed for assets to send
     * @param feesInAssetsSent amount of assets fees were redeemed for that were sent
     */
    event SendFees(uint256 feesInSharesRedeemed, uint256 feesInAssetsSent);

    /**
     * @notice Transfer accrued fees to the Sommelier chain to distribute.
     * @dev Fees are accrued as shares and redeemed upon transfer.
     * @dev assumes cellar's accounting asset is able to be transferred and sent to Cosmos
     */
    function sendFees() external nonReentrant {
        address strategistPayoutAddress = feeData.strategistPayoutAddress;
        if (strategistPayoutAddress == address(0)) revert Cellar__PayoutNotSet();

        uint256 _totalAssets = _accounting(false);

        // Calculate platform fees earned.
        uint256 elapsedTime = block.timestamp - feeData.lastAccrual;
        uint256 platformFeeInAssets = (_totalAssets * elapsedTime * feeData.platformFee) / 1e18 / 365 days;
        uint256 platformFees = _convertToFees(_convertToShares(platformFeeInAssets, _totalAssets));
        _mint(address(this), platformFees);

        uint256 strategistFeeSharesDue = platformFees.mulWadDown(feeData.strategistPlatformCut);
        if (strategistFeeSharesDue > 0) {
            //transfer shares to strategist
            // Take from Solmate ERC20.sol
            {
                balanceOf[address(this)] -= strategistFeeSharesDue;

                // Cannot overflow because the sum of all user
                // balances can't exceed the max uint256 value.
                unchecked {
                    balanceOf[strategistPayoutAddress] += strategistFeeSharesDue;
                }

                emit Transfer(address(this), strategistPayoutAddress, strategistFeeSharesDue);
            }
            // _transfer(address(this), strategistPayoutAddress, strategistFeeSharesDue);

            platformFees -= strategistFeeSharesDue;
        }

        feeData.lastAccrual = uint32(block.timestamp);

        // Redeem our fee shares for assets to send to the fee distributor module.
        uint256 assets = _convertToAssets(platformFees, _totalAssets);
        if (assets > 0) {
            _burn(address(this), platformFees);

            // Transfer assets to a fee distributor on the Sommelier chain.
            IGravity gravityBridge = IGravity(registry.getAddress(GRAVITY_BRIDGE_REGISTRY_SLOT));
            asset.safeApprove(address(gravityBridge), assets);
            gravityBridge.sendToCosmos(address(asset), registry.feesDistributor(), assets);
        }

        emit SendFees(platformFees, assets);
    }

    // ========================================== HELPER FUNCTIONS ==========================================
    /**
     * @dev Deposit into a position according to its position type and update related state.
     * @param position address to deposit funds into
     * @param assets the amount of assets to deposit into the position
     */
    function _depositTo(uint32 position, uint256 assets) internal {
        address adaptor = getPositionData[position].adaptor;
        adaptor.functionDelegateCall(
            abi.encodeWithSelector(
                BaseAdaptor.deposit.selector,
                assets,
                getPositionData[position].adaptorData,
                getPositionData[position].configurationData
            )
        );
    }

    /**
     * @dev Withdraw from a position according to its position type and update related state.
     * @param position address to withdraw funds from
     * @param assets the amount of assets to withdraw from the position
     * @param receiver the address to sent withdrawn assets to
     */
    function _withdrawFrom(
        uint32 position,
        uint256 assets,
        address receiver
    ) internal {
        address adaptor = getPositionData[position].adaptor;
        adaptor.functionDelegateCall(
            abi.encodeWithSelector(
                BaseAdaptor.withdraw.selector,
                assets,
                receiver,
                getPositionData[position].adaptorData,
                getPositionData[position].configurationData
            )
        );
    }

    /**
     * @dev Get the withdrawable balance of a position according to its position type.
     * @param position position to get the withdrawable balance of
     */
    function _withdrawableFrom(uint32 position) internal view returns (uint256) {
        // Debt positions always return 0 for their withdrawable.
        if (getPositionData[position].isDebt) return 0;
        return
            BaseAdaptor(getPositionData[position].adaptor).withdrawableFrom(
                getPositionData[position].adaptorData,
                getPositionData[position].configurationData
            );
    }

    /**
     * @dev Get the balance of a position according to its position type.
     * @dev For ERC4626 position balances, this uses `previewRedeem` as opposed
     *      to `convertToAssets` so that balanceOf ERC4626 positions includes fees taken on withdraw.
     * @param position position to get the balance of
     */
    function _balanceOf(uint32 position) internal view returns (uint256) {
        address adaptor = getPositionData[position].adaptor;
        return BaseAdaptor(adaptor).balanceOf(getPositionData[position].adaptorData);
    }

    /**
     * @dev Get the asset of a position according to its position type.
     * @param position to get the asset of
     */
    function _assetOf(uint32 position) internal view returns (ERC20) {
        address adaptor = getPositionData[position].adaptor;
        return BaseAdaptor(adaptor).assetOf(getPositionData[position].adaptorData);
    }

    /**
     * @notice Get all the credit positions underlying assets.
     */
    function getPositionAssets() external view returns (ERC20[] memory assets) {
        assets = new ERC20[](creditPositions.length);
        for (uint256 i = 0; i < creditPositions.length; ++i) {
            assets[i] = _assetOf(creditPositions[i]);
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

/// @notice Modern and gas efficient ERC20 + EIP-2612 implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/ERC20.sol)
/// @author Modified from Uniswap (https://github.com/Uniswap/uniswap-v2-core/blob/master/contracts/UniswapV2ERC20.sol)
/// @dev Do not manually set balances without updating totalSupply, as the sum of all user balances must not exceed it.
abstract contract ERC20 {
    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

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

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

    /*//////////////////////////////////////////////////////////////
                            METADATA STORAGE
    //////////////////////////////////////////////////////////////*/

    string public name;

    string public symbol;

    uint8 public decimals;

    /*//////////////////////////////////////////////////////////////
                              ERC20 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;

    mapping(address => mapping(address => uint256)) public allowance;

    /*//////////////////////////////////////////////////////////////
                            EIP-2612 STORAGE
    //////////////////////////////////////////////////////////////*/

    uint256 internal INITIAL_CHAIN_ID;

    bytes32 internal INITIAL_DOMAIN_SEPARATOR;

    mapping(address => uint256) public nonces;

    /*//////////////////////////////////////////////////////////////
                               CONSTRUCTOR
    //////////////////////////////////////////////////////////////*/

    constructor(
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;

        INITIAL_CHAIN_ID = block.chainid;
        INITIAL_DOMAIN_SEPARATOR = computeDomainSeparator();
    }

    /*//////////////////////////////////////////////////////////////
                               ERC20 LOGIC
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        allowance[msg.sender][spender] = amount;

        emit Approval(msg.sender, spender, amount);

        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        balanceOf[msg.sender] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(msg.sender, to, amount);

        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        uint256 allowed = allowance[from][msg.sender]; // Saves gas for limited approvals.

        if (allowed != type(uint256).max) allowance[from][msg.sender] = allowed - amount;

        balanceOf[from] -= amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(from, to, amount);

        return true;
    }

    /*//////////////////////////////////////////////////////////////
                             EIP-2612 LOGIC
    //////////////////////////////////////////////////////////////*/

    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) public virtual {
        require(deadline >= block.timestamp, "PERMIT_DEADLINE_EXPIRED");

        // Unchecked because the only math done is incrementing
        // the owner's nonce which cannot realistically overflow.
        unchecked {
            address recoveredAddress = ecrecover(
                keccak256(
                    abi.encodePacked(
                        "\x19\x01",
                        DOMAIN_SEPARATOR(),
                        keccak256(
                            abi.encode(
                                keccak256(
                                    "Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)"
                                ),
                                owner,
                                spender,
                                value,
                                nonces[owner]++,
                                deadline
                            )
                        )
                    )
                ),
                v,
                r,
                s
            );

            require(recoveredAddress != address(0) && recoveredAddress == owner, "INVALID_SIGNER");

            allowance[recoveredAddress][spender] = value;
        }

        emit Approval(owner, spender, value);
    }

    function DOMAIN_SEPARATOR() public view virtual returns (bytes32) {
        return block.chainid == INITIAL_CHAIN_ID ? INITIAL_DOMAIN_SEPARATOR : computeDomainSeparator();
    }

    function computeDomainSeparator() internal view virtual returns (bytes32) {
        return
            keccak256(
                abi.encode(
                    keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)"),
                    keccak256(bytes(name)),
                    keccak256("1"),
                    block.chainid,
                    address(this)
                )
            );
    }

    /*//////////////////////////////////////////////////////////////
                        INTERNAL MINT/BURN LOGIC
    //////////////////////////////////////////////////////////////*/

    function _mint(address to, uint256 amount) internal virtual {
        totalSupply += amount;

        // Cannot overflow because the sum of all user
        // balances can't exceed the max uint256 value.
        unchecked {
            balanceOf[to] += amount;
        }

        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal virtual {
        balanceOf[from] -= amount;

        // Cannot underflow because a user's balance
        // will never be larger than the total supply.
        unchecked {
            totalSupply -= amount;
        }

        emit Transfer(from, address(0), amount);
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import { ERC20 } from "src/base/ERC20.sol";
import { SafeTransferLib } from "src/base/SafeTransferLib.sol";
import { Math } from "src/utils/Math.sol";

/// @notice Minimal ERC4626 tokenized Vault implementation.
/// @author Solmate (https://github.com/Rari-Capital/solmate/blob/main/src/mixins/ERC4626.sol)
abstract contract ERC4626 is ERC20 {
    using SafeTransferLib for ERC20;
    using Math for uint256;

    /*//////////////////////////////////////////////////////////////
                                 EVENTS
    //////////////////////////////////////////////////////////////*/

    event Deposit(address indexed caller, address indexed owner, uint256 assets, uint256 shares);

    event Withdraw(
        address indexed caller,
        address indexed receiver,
        address indexed owner,
        uint256 assets,
        uint256 shares
    );

    /*//////////////////////////////////////////////////////////////
                               IMMUTABLES
    //////////////////////////////////////////////////////////////*/

    ERC20 public asset;

    constructor(
        ERC20 _asset,
        string memory _name,
        string memory _symbol,
        uint8 _decimals
    ) ERC20(_name, _symbol, _decimals) {
        asset = _asset;
    }

    /*//////////////////////////////////////////////////////////////
                        DEPOSIT/WITHDRAWAL LOGIC
    //////////////////////////////////////////////////////////////*/

    function deposit(uint256 assets, address receiver) public virtual returns (uint256 shares) {
        // Check for rounding error since we round down in previewDeposit.
        require((shares = previewDeposit(assets)) != 0, "ZERO_SHARES");

        beforeDeposit(assets, shares, receiver);

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares, receiver);
    }

    function mint(uint256 shares, address receiver) public virtual returns (uint256 assets) {
        assets = previewMint(shares); // No need to check for rounding error, previewMint rounds up.

        beforeDeposit(assets, shares, receiver);

        // Need to transfer before minting or ERC777s could reenter.
        asset.safeTransferFrom(msg.sender, address(this), assets);

        _mint(receiver, shares);

        emit Deposit(msg.sender, receiver, assets, shares);

        afterDeposit(assets, shares, receiver);
    }

    function withdraw(
        uint256 assets,
        address receiver,
        address owner
    ) public virtual returns (uint256 shares) {
        shares = previewWithdraw(assets); // No need to check for rounding error, previewWithdraw rounds up.

        if (msg.sender != owner) {
            uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals.

            if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares;
        }

        beforeWithdraw(assets, shares, receiver, owner);

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        asset.safeTransfer(receiver, assets);

        afterWithdraw(assets, shares, receiver, owner);
    }

    function redeem(
        uint256 shares,
        address receiver,
        address owner
    ) public virtual returns (uint256 assets) {
        if (msg.sender != owner) {
            uint256 allowed = allowance[owner][msg.sender]; // Saves gas for limited approvals.

            if (allowed != type(uint256).max) allowance[owner][msg.sender] = allowed - shares;
        }

        // Check for rounding error since we round down in previewRedeem.
        require((assets = previewRedeem(shares)) != 0, "ZERO_ASSETS");

        beforeWithdraw(assets, shares, receiver, owner);

        _burn(owner, shares);

        emit Withdraw(msg.sender, receiver, owner, assets, shares);

        asset.safeTransfer(receiver, assets);

        afterWithdraw(assets, shares, receiver, owner);
    }

    /*//////////////////////////////////////////////////////////////
                            ACCOUNTING LOGIC
    //////////////////////////////////////////////////////////////*/

    function totalAssets() public view virtual returns (uint256);

    function convertToShares(uint256 assets) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? assets : assets.mulDivDown(supply, totalAssets());
    }

    function convertToAssets(uint256 shares) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? shares : shares.mulDivDown(totalAssets(), supply);
    }

    function previewDeposit(uint256 assets) public view virtual returns (uint256) {
        return convertToShares(assets);
    }

    function previewMint(uint256 shares) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? shares : shares.mulDivUp(totalAssets(), supply);
    }

    function previewWithdraw(uint256 assets) public view virtual returns (uint256) {
        uint256 supply = totalSupply; // Saves an extra SLOAD if totalSupply is non-zero.

        return supply == 0 ? assets : assets.mulDivUp(supply, totalAssets());
    }

    function previewRedeem(uint256 shares) public view virtual returns (uint256) {
        return convertToAssets(shares);
    }

    /*//////////////////////////////////////////////////////////////
                     DEPOSIT/WITHDRAWAL LIMIT LOGIC
    //////////////////////////////////////////////////////////////*/

    function maxDeposit(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    function maxMint(address) public view virtual returns (uint256) {
        return type(uint256).max;
    }

    function maxWithdraw(address owner) public view virtual returns (uint256) {
        return convertToAssets(balanceOf[owner]);
    }

    function maxRedeem(address owner) public view virtual returns (uint256) {
        return balanceOf[owner];
    }

    /*//////////////////////////////////////////////////////////////
                          INTERNAL HOOKS LOGIC
    //////////////////////////////////////////////////////////////*/

    function beforeDeposit(
        uint256 assets,
        uint256 shares,
        address receiver
    ) internal virtual {}

    function afterDeposit(
        uint256 assets,
        uint256 shares,
        address receiver
    ) internal virtual {}

    function beforeWithdraw(
        uint256 assets,
        uint256 shares,
        address receiver,
        address owner
    ) internal virtual {}

    function afterWithdraw(
        uint256 assets,
        uint256 shares,
        address receiver,
        address owner
    ) internal virtual {}
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;

import { IMulticall } from "src/interfaces/IMulticall.sol";

/**
 * @title Multicall
 * @notice Enables calling multiple methods in a single call to the contract
 * From: https://github.com/Uniswap/v3-periphery/blob/1d69caf0d6c8cfeae9acd1f34ead30018d6e6400/contracts/base/Multicall.sol
 */
abstract contract Multicall is IMulticall {
    /// @inheritdoc IMulticall
    function multicall(bytes[] calldata data) public payable override returns (bytes[] memory results) {
        results = new bytes[](data.length);
        for (uint256 i = 0; i < data.length; i++) {
            (bool success, bytes memory result) = address(this).delegatecall(data[i]);

            if (!success) {
                // Next 5 lines from https://ethereum.stackexchange.com/a/83577
                // solhint-disable-next-line reason-string
                if (result.length < 68) revert();
                assembly {
                    result := add(result, 0x04)
                }
                revert(abi.decode(result, (string)));
            }

            results[i] = result;
        }
    }
}

// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;

import { ERC20 } from "src/base/ERC20.sol";

/// @notice Safe ETH and ERC20 transfer library that gracefully handles missing return values.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/utils/SafeTransferLib.sol)
/// @dev Use with caution! Some functions in this library knowingly create dirty bits at the destination of the free memory pointer.
/// @dev Note that none of the functions in this library check that a token has code at all! That responsibility is delegated to the caller.
library SafeTransferLib {
    /*//////////////////////////////////////////////////////////////
                             ETH OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferETH(address to, uint256 amount) internal {
        bool success;

        assembly {
            // Transfer the ETH and store if it succeeded or not.
            success := call(gas(), to, amount, 0, 0, 0, 0)
        }

        require(success, "ETH_TRANSFER_FAILED");
    }

    /*//////////////////////////////////////////////////////////////
                            ERC20 OPERATIONS
    //////////////////////////////////////////////////////////////*/

    function safeTransferFrom(
        ERC20 token,
        address from,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x23b872dd00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), from) // Append the "from" argument.
            mstore(add(freeMemoryPointer, 36), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 68), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 100 because the length of our calldata totals up like so: 4 + 32 * 3.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 100, 0, 32)
            )
        }

        require(success, "TRANSFER_FROM_FAILED");
    }

    function safeTransfer(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0xa9059cbb00000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "TRANSFER_FAILED");
    }

    function safeApprove(
        ERC20 token,
        address to,
        uint256 amount
    ) internal {
        bool success;

        assembly {
            // Get a pointer to some free memory.
            let freeMemoryPointer := mload(0x40)

            // Write the abi-encoded calldata into memory, beginning with the function selector.
            mstore(freeMemoryPointer, 0x095ea7b300000000000000000000000000000000000000000000000000000000)
            mstore(add(freeMemoryPointer, 4), to) // Append the "to" argument.
            mstore(add(freeMemoryPointer, 36), amount) // Append the "amount" argument.

            success := and(
                // Set success to whether the call reverted, if not we check it either
                // returned exactly 1 (can't just be non-zero data), or had no return data.
                or(and(eq(mload(0), 1), gt(returndatasize(), 31)), iszero(returndatasize())),
                // We use 68 because the length of our calldata totals up like so: 4 + 32 * 2.
                // We use 0 and 32 to copy up to 32 bytes of return data into the scratch space.
                // Counterintuitively, this call must be positioned second to the or() call in the
                // surrounding and() call or else returndatasize() will be zero during the computation.
                call(gas(), token, 0, freeMemoryPointer, 68, 0, 32)
            )
        }

        require(success, "APPROVE_FAILED");
    }
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;

/// @title Multicall interface
/// @notice Enables calling multiple methods in a single call to the contract
// From: https://github.com/Uniswap/v3-periphery/contracts/interfaces/IMulticall.sol
interface IMulticall {
    /// @notice Call multiple functions in the current contract and return the data from all of them if they all succeed
    /// @dev The `msg.value` should not be trusted for any method callable from multicall.
    /// @param data The encoded function data for each of the calls to make to this contract
    /// @return results The results from each of the calls passed in via data
    function multicall(bytes[] calldata data) external payable returns (bytes[] memory results);
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.16;

import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

interface IAaveToken {
    function UNDERLYING_ASSET_ADDRESS() external view returns (address);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import "@chainlink/contracts/src/v0.8/interfaces/AggregatorV2V3Interface.sol";

interface IChainlinkAggregator is AggregatorV2V3Interface {
    function maxAnswer() external view returns (int192);

    function minAnswer() external view returns (int192);

    function aggregator() external view returns (address);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

interface ICurvePool {
    function coins(uint256 i) external view returns (address);

    function get_virtual_price() external view returns (uint256);

    function claim_admin_fees() external; // For USDT/WETH/WBTC

    function withdraw_admin_fees() external;

    function gamma() external view returns (uint256);

    function A() external view returns (uint256);

    function lp_price() external view returns (uint256);

    function price_oracle() external view returns (uint256);

    function price_oracle(uint256 i) external view returns (uint256);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

interface IGravity {
    function sendToCosmos(
        address _tokenContract,
        bytes32 _destination,
        uint256 _amount
    ) external;
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity >=0.8.0;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);

    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint256 amountADesired,
        uint256 amountBDesired,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    )
        external
        returns (
            uint256 amountA,
            uint256 amountB,
            uint256 liquidity
        );

    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    )
        external
        payable
        returns (
            uint256 amountToken,
            uint256 amountETH,
            uint256 liquidity
        );

    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETH(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountToken, uint256 amountETH);

    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint256 liquidity,
        uint256 amountAMin,
        uint256 amountBMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountA, uint256 amountB);

    function removeLiquidityETHWithPermit(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountToken, uint256 amountETH);

    function swapExactTokensForTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapTokensForExactTokens(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactETHForTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function swapTokensForExactETH(
        uint256 amountOut,
        uint256 amountInMax,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapExactTokensForETH(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external returns (uint256[] memory amounts);

    function swapETHForExactTokens(
        uint256 amountOut,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable returns (uint256[] memory amounts);

    function quote(
        uint256 amountA,
        uint256 reserveA,
        uint256 reserveB
    ) external pure returns (uint256 amountB);

    function getAmountOut(
        uint256 amountIn,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountOut);

    function getAmountIn(
        uint256 amountOut,
        uint256 reserveIn,
        uint256 reserveOut
    ) external pure returns (uint256 amountIn);

    function getAmountsOut(uint256 amountIn, address[] calldata path) external view returns (uint256[] memory amounts);

    function getAmountsIn(uint256 amountOut, address[] calldata path) external view returns (uint256[] memory amounts);
}

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external returns (uint256 amountETH);

    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint256 liquidity,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline,
        bool approveMax,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external returns (uint256 amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;

    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external payable;

    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint256 amountIn,
        uint256 amountOutMin,
        address[] calldata path,
        address to,
        uint256 deadline
    ) external;
}

// SPDX-License-Identifier: GPL-2.0-or-later
pragma solidity >=0.8.0;

/// @title Callback for IUniswapV3PoolActions#swap
/// @notice Any contract that calls IUniswapV3PoolActions#swap must implement this interface
interface IUniswapV3SwapCallback {
    /// @notice Called to `msg.sender` after executing a swap via IUniswapV3Pool#swap.
    /// @dev In the implementation you must pay the pool tokens owed for the swap.
    /// The caller of this method must be checked to be a UniswapV3Pool deployed by the canonical UniswapV3Factory.
    /// amount0Delta and amount1Delta can both be 0 if no tokens were swapped.
    /// @param amount0Delta The amount of token0 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token0 to the pool.
    /// @param amount1Delta The amount of token1 that was sent (negative) or must be received (positive) by the pool by
    /// the end of the swap. If positive, the callback must send that amount of token1 to the pool.
    /// @param data Any data passed through by the caller via the IUniswapV3PoolActions#swap call
    function uniswapV3SwapCallback(
        int256 amount0Delta,
        int256 amount1Delta,
        bytes calldata data
    ) external;
}

/// @title Router token swapping functionality
/// @notice Functions for swapping tokens via Uniswap V3
interface IUniswapV3Router is IUniswapV3SwapCallback {
    struct ExactInputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactInputSingleParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInputSingle(ExactInputSingleParams calldata params) external payable returns (uint256 amountOut);

    struct ExactInputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountIn;
        uint256 amountOutMinimum;
    }

    /// @notice Swaps `amountIn` of one token for as much as possible of another along the specified path
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactInputParams` in calldata
    /// @return amountOut The amount of the received token
    function exactInput(ExactInputParams calldata params) external payable returns (uint256 amountOut);

    struct ExactOutputSingleParams {
        address tokenIn;
        address tokenOut;
        uint24 fee;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
        uint160 sqrtPriceLimitX96;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another token
    /// @param params The parameters necessary for the swap, encoded as `ExactOutputSingleParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutputSingle(ExactOutputSingleParams calldata params) external payable returns (uint256 amountIn);

    struct ExactOutputParams {
        bytes path;
        address recipient;
        uint256 deadline;
        uint256 amountOut;
        uint256 amountInMaximum;
    }

    /// @notice Swaps as little as possible of one token for `amountOut` of another along the specified path (reversed)
    /// @param params The parameters necessary for the multi-hop swap, encoded as `ExactOutputParams` in calldata
    /// @return amountIn The amount of the input token
    function exactOutput(ExactOutputParams calldata params) external payable returns (uint256 amountIn);
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { ERC20, SafeTransferLib, Math } from "src/base/ERC4626.sol";
import { Registry } from "src/Registry.sol";
import { Cellar } from "src/base/Cellar.sol";
import { SwapRouter } from "src/modules/swap-router/SwapRouter.sol";
import { PriceRouter } from "src/modules/price-router/PriceRouter.sol";

/**
 * @title Base Adaptor
 * @notice Base contract all adaptors must inherit from.
 * @dev Allows Cellars to interact with arbritrary DeFi assets and protocols.
 * @author crispymangoes
 */
abstract contract BaseAdaptor {
    using SafeTransferLib for ERC20;
    using Math for uint256;

    /**
     * @notice Attempted to specify an external receiver during a Cellar `callOnAdaptor` call.
     */
    error BaseAdaptor__ExternalReceiverBlocked();

    /**
     * @notice Attempted to deposit to a position where user deposits were not allowed.
     */
    error BaseAdaptor__UserDepositsNotAllowed();

    /**
     * @notice Attempted to withdraw from a position where user withdraws were not allowed.
     */
    error BaseAdaptor__UserWithdrawsNotAllowed();

    //============================================ Global Functions ===========================================
    /**
     * @dev Identifier unique to this adaptor for a shared registry.
     * Normally the identifier would just be the address of this contract, but this
     * Identifier is needed during Cellar Delegate Call Operations, so getting the address
     * of the adaptor is more difficult.
     */
    function identifier() public pure virtual returns (bytes32) {
        return keccak256(abi.encode("Base Adaptor V 0.0"));
    }

    function SWAP_ROUTER_REGISTRY_SLOT() internal pure returns (uint256) {
        return 1;
    }

    function PRICE_ROUTER_REGISTRY_SLOT() internal pure returns (uint256) {
        return 2;
    }

    //============================================ Implement Base Functions ===========================================
    //==================== Base Function Specification ====================
    // Base functions are functions designed to help the Cellar interact with
    // an adaptor position, strategists are not intended to use these functions.
    // Base functions MUST be implemented in adaptor contracts, even if that is just
    // adding a revert statement to make them uncallable by normal user operations.
    //
    // All view Base functions will be called used normal staticcall.
    // All mutative Base functions will be called using delegatecall.
    //=====================================================================
    /**
     * @notice Function Cellars call to deposit users funds into holding position.
     * @param assets the amount of assets to deposit
     * @param adaptorData data needed to deposit into a position
     * @param configurationData data settable when strategists add positions to their Cellar
     *                          Allows strategist to control how the adaptor interacts with the position
     */
    function deposit(
        uint256 assets,
        bytes memory adaptorData,
        bytes memory configurationData
    ) public virtual;

    /**
     * @notice Function Cellars call to withdraw funds from positions to send to users.
     * @param receiver the address that should receive withdrawn funds
     * @param adaptorData data needed to withdraw from a position
     * @param configurationData data settable when strategists add positions to their Cellar
     *                          Allows strategist to control how the adaptor interacts with the position
     */
    function withdraw(
        uint256 assets,
        address receiver,
        bytes memory adaptorData,
        bytes memory configurationData
    ) public virtual;

    /**
     * @notice Function Cellars use to determine `assetOf` balance of an adaptor position.
     * @param adaptorData data needed to interact with the position
     * @return balance of the position in terms of `assetOf`
     */
    function balanceOf(bytes memory adaptorData) public view virtual returns (uint256);

    /**
     * @notice Functions Cellars use to determine the withdrawable balance from an adaptor position.
     * @dev Debt positions MUST return 0 for their `withdrawableFrom`
     * @notice accepts adaptorData and configurationData
     * @return withdrawable balance of the position in terms of `assetOf`
     */
    function withdrawableFrom(bytes memory, bytes memory) public view virtual returns (uint256);

    /**
     * @notice Function Cellars use to determine the underlying ERC20 asset of a position.
     * @param adaptorData data needed to withdraw from a position
     * @return the underlying ERC20 asset of a position
     */
    function assetOf(bytes memory adaptorData) public view virtual returns (ERC20);

    /**
     * @notice When positions are added to the Registry, this function can be used in order to figure out
     *         what assets this adaptor needs to price, and confirm pricing is properly setup.
     */
    function assetsUsed(bytes memory adaptorData) public view virtual returns (ERC20[] memory assets) {
        assets = new ERC20[](1);
        assets[0] = assetOf(adaptorData);
    }

    /**
     * @notice Functions Registry/Cellars use to determine if this adaptor reports debt values.
     * @dev returns true if this adaptor reports debt values.
     */
    function isDebt() public view virtual returns (bool);

    //============================================ Strategist Functions ===========================================
    //==================== Strategist Function Specification ====================
    // Strategist functions are only callable by strategists through the Cellars
    // `callOnAdaptor` function. A cellar will never call any of these functions,
    // when a normal user interacts with a cellar(depositing/withdrawing)
    //
    // All strategist functions will be called using delegatecall.
    // Strategist functions are intentionally "blind" to what positions the cellar
    // is currently holding. This allows strategists to enter temporary positions
    // while rebalancing.
    // To mitigate strategist from abusing this and moving funds in untracked
    // positions, the cellar will enforce a Total Value Locked check that
    // insures TVL has not deviated too much from `callOnAdaptor`.
    //===========================================================================

    //============================================ Helper Functions ===========================================
    /**
     * @notice Helper function that allows adaptor calls to use the max available of an ERC20 asset
     * by passing in type(uint256).max
     * @param token the ERC20 asset to work with
     * @param amount when `type(uint256).max` is used, this function returns `token`s `balanceOf`
     * otherwise this function returns amount.
     */
    function _maxAvailable(ERC20 token, uint256 amount) internal view virtual returns (uint256) {
        if (amount == type(uint256).max) return token.balanceOf(address(this));
        else return amount;
    }

    /**
     * @notice Helper function that allows adaptors to make swaps using the Swap Router
     * @param assetIn the asset to make a swap with
     * @param assetOut the asset to get out of the swap
     * @param amountIn the amount of `assetIn` to swap with
     * @param exchange enum value that determines what exchange to make the swap on
     *                 see SwapRouter.sol
     * @param params swap params needed to perform the swap, dependent on which exchange is selected
     *               see SwapRouter.sol
     * @return amountOut the amount of `assetOut` received from the swap.
     */
    function swap(
        ERC20 assetIn,
        ERC20 assetOut,
        uint256 amountIn,
        SwapRouter.Exchange exchange,
        bytes memory params
    ) public returns (uint256 amountOut) {
        // Get the address of the latest swap router.
        SwapRouter swapRouter = SwapRouter(Cellar(address(this)).registry().getAddress(SWAP_ROUTER_REGISTRY_SLOT()));

        // Approve swap router to swap assets.
        assetIn.safeApprove(address(swapRouter), amountIn);

        // Perform swap.
        amountOut = swapRouter.swap(exchange, params, address(this), assetIn, assetOut);
    }

    /**
     * @notice Helper function that validates external receivers are allowed.
     */
    function _externalReceiverCheck(address receiver) internal view {
        if (receiver != address(this) && Cellar(address(this)).blockExternalReceiver())
            revert BaseAdaptor__ExternalReceiverBlocked();
    }

    /**
     * @notice Attempted oracle swap did not pass slippage check.
     */
    error BaseAdaptor__BadSlippage();

    /**
     * @notice Attempted to make an oracle swap on an unsupported exchange.
     */
    error BaseAdaptor__ExchangeNotSupported();

    /**
     * @notice Helper function to make safe "blind" Uniswap Swaps by comparing value in vs value out of the swap.
     * @dev Only works for Uniswap V2 or V3 exchanges.
     * @param assetIn the asset to make a swap with
     * @param assetOut the asset to get out of the swap
     * @param amountIn the amount of `assetIn` to swap with, can be type(uint256).max
     * @param exchange enum value that determines what exchange to make the swap on
     *                 see SwapRouter.sol
     * @param params swap params needed to perform the swap, dependent on which exchange is selected
     *               see SwapRouter.sol
     * @param slippage number less than 1e18, defining the max swap slippage
     * @return amountOut the amount of `assetOut` received from the swap.
     */
    function oracleSwap(
        ERC20 assetIn,
        ERC20 assetOut,
        uint256 amountIn,
        SwapRouter.Exchange exchange,
        bytes memory params,
        uint64 slippage
    ) public returns (uint256 amountOut) {
        amountIn = _maxAvailable(assetIn, amountIn);
        // Copy over the path/fees then set the amount and minAmount.
        if (exchange == SwapRouter.Exchange.UNIV2) {
            address[] memory path = abi.decode(params, (address[]));
            params = abi.encode(path, amountIn, 0);
        } else if (exchange == SwapRouter.Exchange.UNIV3) {
            (address[] memory path, uint24[] memory poolFees) = abi.decode(params, (address[], uint24[]));
            params = abi.encode(path, poolFees, amountIn, 0);
        } else revert BaseAdaptor__ExchangeNotSupported();

        // Get the address of the latest swap router.
        SwapRouter swapRouter = SwapRouter(Cellar(address(this)).registry().getAddress(SWAP_ROUTER_REGISTRY_SLOT()));

        // Get the address of the latest price router.
        PriceRouter priceRouter = PriceRouter(
            Cellar(address(this)).registry().getAddress(PRICE_ROUTER_REGISTRY_SLOT())
        );

        // Approve swap router to swap assets.
        assetIn.safeApprove(address(swapRouter), amountIn);

        // Perform swap.
        amountOut = swapRouter.swap(exchange, params, address(this), assetIn, assetOut);

        // Make sure amountIn vs amountOut is reasonable.
        amountIn = priceRouter.getValue(assetIn, amountIn, assetOut);
        uint256 amountInWithSlippage = amountIn.mulDivDown(slippage, 1e18);
        if (amountOut < amountInWithSlippage) revert BaseAdaptor__BadSlippage();
    }

    /**
     * @notice Allows strategists to zero out an approval for a given `asset`.
     * @param asset the ERC20 asset to revoke `spender`s approval for
     * @param spender the address to revoke approval for
     */
    function revokeApproval(ERC20 asset, address spender) public {
        asset.safeApprove(spender, 0);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { ERC20, SafeTransferLib } from "src/base/ERC4626.sol";
import { Ownable } from "@openzeppelin/contracts/access/Ownable.sol";
import { AutomationCompatibleInterface } from "@chainlink/contracts/src/v0.8/interfaces/AutomationCompatibleInterface.sol";
import { IChainlinkAggregator } from "src/interfaces/external/IChainlinkAggregator.sol";
import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import { Math } from "src/utils/Math.sol";
import { Address } from "@openzeppelin/contracts/utils/Address.sol";
import { ICurvePool } from "src/interfaces/external/ICurvePool.sol";
import { IAaveToken } from "src/interfaces/external/IAaveToken.sol";

/**
 * @title Sommelier Price Router
 * @notice Provides a universal interface allowing Sommelier contracts to retrieve secure pricing
 *         data from Chainlink.
 * @author crispymangoes, Brian Le
 */
contract PriceRouter is Ownable, AutomationCompatibleInterface {
    using SafeTransferLib for ERC20;
    using SafeCast for int256;
    using Math for uint256;
    using Address for address;

    event AddAsset(address indexed asset);

    // =========================================== ASSETS CONFIG ===========================================
    /**
     * @notice Bare minimum settings all derivatives support.
     * @param derivative the derivative used to price the asset
     * @param source the address used to price the asset
     */
    struct AssetSettings {
        uint8 derivative;
        address source;
    }

    /**
     * @notice Mapping between an asset to price and its `AssetSettings`.
     */
    mapping(ERC20 => AssetSettings) public getAssetSettings;

    // ======================================= ADAPTOR OPERATIONS =======================================

    /**
     * @notice Attempted to set a minimum price below the Chainlink minimum price (with buffer).
     * @param minPrice minimum price attempted to set
     * @param bufferedMinPrice minimum price that can be set including buffer
     */
    error PriceRouter__InvalidMinPrice(uint256 minPrice, uint256 bufferedMinPrice);

    /**
     * @notice Attempted to set a maximum price above the Chainlink maximum price (with buffer).
     * @param maxPrice maximum price attempted to set
     * @param bufferedMaxPrice maximum price that can be set including buffer
     */
    error PriceRouter__InvalidMaxPrice(uint256 maxPrice, uint256 bufferedMaxPrice);

    /**
     * @notice Attempted to add an invalid asset.
     * @param asset address of the invalid asset
     */
    error PriceRouter__InvalidAsset(address asset);

    /**
     * @notice Attempted to add an asset, but actual answer was outside range of expectedAnswer.
     */
    error PriceRouter__BadAnswer(uint256 answer, uint256 expectedAnswer);

    /**
     * @notice Attempted to perform an operation using an unkown derivative.
     */
    error PriceRouter__UnkownDerivative(uint8 unkownDerivative);

    /**
     * @notice Attempted to add an asset with invalid min/max prices.
     * @param min price
     * @param max price
     */
    error PriceRouter__MinPriceGreaterThanMaxPrice(uint256 min, uint256 max);

    /**
     * @notice The allowed deviation between the expected answer vs the actual answer.
     */
    uint256 public constant EXPECTED_ANSWER_DEVIATION = 0.02e18;

    /**
     * @notice Stores pricing information during calls.
     * @param asset the address of the asset
     * @param price the USD price of the asset
     * @dev If the price does not fit into a uint96, the asset is NOT added to the cache.
     */
    struct PriceCache {
        address asset;
        uint96 price;
    }

    /**
     * @notice The size of the price cache. A larger cache can hold more values,
     *         but incurs a larger gas cost overhead. A smaller cache has a
     *         smaller gas overhead but caches less prices.
     */
    uint8 private constant PRICE_CACHE_SIZE = 8;

    /**
     * @notice Allows owner to add assets to the price router.
     * @dev Performs a sanity check by comparing the price router computed price to
     * a user input `_expectedAnswer`.
     * @param _asset the asset to add to the pricing router
     * @param _settings the settings for `_asset`
     *        @dev The `derivative` value in settings MUST be non zero.
     * @param _storage arbitrary bytes data used to configure `_asset` pricing
     * @param _expectedAnswer the expected answer for the asset from  `_getPriceInUSD`
     */
    function addAsset(
        ERC20 _asset,
        AssetSettings memory _settings,
        bytes memory _storage,
        uint256 _expectedAnswer
    ) external onlyOwner {
        if (address(_asset) == address(0)) revert PriceRouter__InvalidAsset(address(_asset));
        // Zero is an invalid derivative.
        if (_settings.derivative == 0) revert PriceRouter__UnkownDerivative(_settings.derivative);

        // Call setup function for appropriate derivative.
        if (_settings.derivative == 1) {
            _setupPriceForChainlinkDerivative(_asset, _settings.source, _storage);
        } else if (_settings.derivative == 2) {
            _setupPriceForCurveDerivative(_asset, _settings.source, _storage);
        } else if (_settings.derivative == 3) {
            _setupPriceForCurveV2Derivative(_asset, _settings.source, _storage);
        } else if (_settings.derivative == 4) {
            _setupPriceForAaveDerivative(_asset, _settings.source, _storage);
        } else revert PriceRouter__UnkownDerivative(_settings.derivative);

        // Check `_getPriceInUSD` against `_expectedAnswer`.
        uint256 minAnswer = _expectedAnswer.mulWadDown((1e18 - EXPECTED_ANSWER_DEVIATION));
        uint256 maxAnswer = _expectedAnswer.mulWadDown((1e18 + EXPECTED_ANSWER_DEVIATION));
        // Create an empty Price Cache.
        PriceCache[PRICE_CACHE_SIZE] memory cache;
        getAssetSettings[_asset] = _settings;
        uint256 answer = _getPriceInUSD(_asset, _settings, cache);
        if (answer < minAnswer || answer > maxAnswer) revert PriceRouter__BadAnswer(answer, _expectedAnswer);

        emit AddAsset(address(_asset));
    }

    /**
     * @notice return bool indicating whether or not an asset has been set up.
     * @dev Since `addAsset` enforces the derivative is non zero, checking if the stored setting
     *      is nonzero is sufficient to see if the asset is set up.
     */
    function isSupported(ERC20 asset) external view returns (bool) {
        return getAssetSettings[asset].derivative > 0;
    }

    // ======================================= CHAINLINK AUTOMATION =======================================
    /**
     * @notice `checkUpkeep` is set up to allow for multiple derivatives to use Chainlink Automation.
     */
    function checkUpkeep(bytes calldata checkData) external view returns (bool upkeepNeeded, bytes memory performData) {
        (uint8 derivative, bytes memory derivativeCheckData) = abi.decode(checkData, (uint8, bytes));

        if (derivative == 2) {
            (upkeepNeeded, performData) = _checkVirtualPriceBound(derivativeCheckData);
        } else if (derivative == 3) {
            (upkeepNeeded, performData) = _checkVirtualPriceBound(derivativeCheckData);
        } else revert PriceRouter__UnkownDerivative(derivative);
    }

    /**
     * @notice `performUpkeep` is set up to allow for multiple derivatives to use Chainlink Automation.
     */
    function performUpkeep(bytes calldata performData) external {
        (uint8 derivative, bytes memory derivativePerformData) = abi.decode(performData, (uint8, bytes));

        if (derivative == 2) {
            _updateVirtualPriceBound(derivativePerformData);
        } else if (derivative == 3) {
            _updateVirtualPriceBound(derivativePerformData);
        } else revert PriceRouter__UnkownDerivative(derivative);
    }

    // ======================================= PRICING OPERATIONS =======================================

    /**
     * @notice Get `asset` price in USD.
     * @dev Returns price in USD with 8 decimals.
     */
    function getPriceInUSD(ERC20 asset) external view returns (uint256) {
        AssetSettings memory assetSettings = getAssetSettings[asset];
        // Create an empty Price Cache.
        PriceCache[PRICE_CACHE_SIZE] memory cache;
        return _getPriceInUSD(asset, assetSettings, cache);
    }

    /**
     * @notice Get the value of an asset in terms of another asset.
     * @param baseAsset address of the asset to get the price of in terms of the quote asset
     * @param amount amount of the base asset to price
     * @param quoteAsset address of the asset that the base asset is priced in terms of
     * @return value value of the amount of base assets specified in terms of the quote asset
     */
    function getValue(
        ERC20 baseAsset,
        uint256 amount,
        ERC20 quoteAsset
    ) external view returns (uint256 value) {
        AssetSettings memory baseSettings = getAssetSettings[baseAsset];
        AssetSettings memory quoteSettings = getAssetSettings[quoteAsset];
        if (baseSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(baseAsset));
        if (quoteSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(quoteAsset));
        PriceCache[PRICE_CACHE_SIZE] memory cache;
        uint256 priceBaseUSD = _getPriceInUSD(baseAsset, baseSettings, cache);
        uint256 priceQuoteUSD = _getPriceInUSD(quoteAsset, quoteSettings, cache);
        value = _getValueInQuote(priceBaseUSD, priceQuoteUSD, baseAsset.decimals(), quoteAsset.decimals(), amount);
    }

    /**
     * @notice Helper function that compares `_getValues` between input 0 and input 1.
     */
    function getValuesDelta(
        ERC20[] calldata baseAssets0,
        uint256[] calldata amounts0,
        ERC20[] calldata baseAssets1,
        uint256[] calldata amounts1,
        ERC20 quoteAsset
    ) external view returns (uint256) {
        // Create an empty Price Cache.
        PriceCache[PRICE_CACHE_SIZE] memory cache;

        uint256 value0 = _getValues(baseAssets0, amounts0, quoteAsset, cache);
        uint256 value1 = _getValues(baseAssets1, amounts1, quoteAsset, cache);
        return value0 - value1;
    }

    /**
     * @notice Helper function that determines the value of assets using `_getValues`.
     */
    function getValues(
        ERC20[] calldata baseAssets,
        uint256[] calldata amounts,
        ERC20 quoteAsset
    ) external view returns (uint256) {
        // Create an empty Price Cache.
        PriceCache[PRICE_CACHE_SIZE] memory cache;

        return _getValues(baseAssets, amounts, quoteAsset, cache);
    }

    /**
     * @notice Get the exchange rate between two assets.
     * @param baseAsset address of the asset to get the exchange rate of in terms of the quote asset
     * @param quoteAsset address of the asset that the base asset is exchanged for
     * @return exchangeRate rate of exchange between the base asset and the quote asset
     */
    function getExchangeRate(ERC20 baseAsset, ERC20 quoteAsset) public view returns (uint256 exchangeRate) {
        AssetSettings memory baseSettings = getAssetSettings[baseAsset];
        AssetSettings memory quoteSettings = getAssetSettings[quoteAsset];
        if (baseSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(baseAsset));
        if (quoteSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(quoteAsset));

        // Create an empty Price Cache.
        PriceCache[PRICE_CACHE_SIZE] memory cache;
        // Pass in zero for ethToUsd, since it has not been set yet.
        exchangeRate = _getExchangeRate(
            baseAsset,
            baseSettings,
            quoteAsset,
            quoteSettings,
            quoteAsset.decimals(),
            cache
        );
    }

    /**
     * @notice Get the exchange rates between multiple assets and another asset.
     * @param baseAssets addresses of the assets to get the exchange rates of in terms of the quote asset
     * @param quoteAsset address of the asset that the base assets are exchanged for
     * @return exchangeRates rate of exchange between the base assets and the quote asset
     */
    function getExchangeRates(ERC20[] memory baseAssets, ERC20 quoteAsset)
        external
        view
        returns (uint256[] memory exchangeRates)
    {
        uint8 quoteAssetDecimals = quoteAsset.decimals();
        AssetSettings memory quoteSettings = getAssetSettings[quoteAsset];
        if (quoteSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(quoteAsset));

        // Create an empty Price Cache.
        PriceCache[PRICE_CACHE_SIZE] memory cache;

        uint256 numOfAssets = baseAssets.length;
        exchangeRates = new uint256[](numOfAssets);
        for (uint256 i; i < numOfAssets; i++) {
            AssetSettings memory baseSettings = getAssetSettings[baseAssets[i]];
            if (baseSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(baseAssets[i]));
            exchangeRates[i] = _getExchangeRate(
                baseAssets[i],
                baseSettings,
                quoteAsset,
                quoteSettings,
                quoteAssetDecimals,
                cache
            );
        }
    }

    // =========================================== HELPER FUNCTIONS ===========================================
    ERC20 private constant WETH = ERC20(0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2);

    /**
     * @notice Attempted to update the asset to one that is not supported by the platform.
     * @param asset address of the unsupported asset
     */
    error PriceRouter__UnsupportedAsset(address asset);

    /**
     * @notice Gets the exchange rate between a base and a quote asset
     * @param baseAsset the asset to convert into quoteAsset
     * @param quoteAsset the asset base asset is converted into
     * @return exchangeRate value of base asset in terms of quote asset
     */
    function _getExchangeRate(
        ERC20 baseAsset,
        AssetSettings memory baseSettings,
        ERC20 quoteAsset,
        AssetSettings memory quoteSettings,
        uint8 quoteAssetDecimals,
        PriceCache[PRICE_CACHE_SIZE] memory cache
    ) internal view returns (uint256) {
        uint256 basePrice = _getPriceInUSD(baseAsset, baseSettings, cache);
        uint256 quotePrice = _getPriceInUSD(quoteAsset, quoteSettings, cache);
        uint256 exchangeRate = basePrice.mulDivDown(10**quoteAssetDecimals, quotePrice);
        return exchangeRate;
    }

    /**
     * @notice Helper function to get an assets price in USD.
     * @dev Returns price in USD with 8 decimals.
     * @dev Favors using cached prices if available.
     */
    function _getPriceInUSD(
        ERC20 asset,
        AssetSettings memory settings,
        PriceCache[PRICE_CACHE_SIZE] memory cache
    ) internal view returns (uint256) {
        // First check if the price is in the price cache.
        uint8 lastIndex = PRICE_CACHE_SIZE;
        for (uint8 i; i < PRICE_CACHE_SIZE; ++i) {
            // Did not find our price in the cache.
            if (cache[i].asset == address(0)) {
                // Save the last index.
                lastIndex = i;
                break;
            }
            // Did find our price in the cache.
            if (cache[i].asset == address(asset)) return cache[i].price;
        }

        // Call get price function using appropriate derivative.
        uint256 price;
        if (settings.derivative == 1) {
            price = _getPriceForChainlinkDerivative(asset, settings.source, cache);
        } else if (settings.derivative == 2) {
            price = _getPriceForCurveDerivative(asset, settings.source, cache);
        } else if (settings.derivative == 3) {
            price = _getPriceForCurveV2Derivative(asset, settings.source, cache);
        } else if (settings.derivative == 4) {
            price = _getPriceForAaveDerivative(asset, settings.source, cache);
        } else revert PriceRouter__UnkownDerivative(settings.derivative);

        // If there is room in the cache, the price fits in a uint96, then find the next spot available.
        if (lastIndex < PRICE_CACHE_SIZE && price <= type(uint96).max) {
            for (uint8 i = lastIndex; i < PRICE_CACHE_SIZE; ++i) {
                // Found an empty cache slot, so fill it.
                if (cache[i].asset == address(0)) {
                    cache[i] = PriceCache(address(asset), uint96(price));
                    break;
                }
            }
        }

        return price;
    }

    /**
     * @notice math function that preserves precision by multiplying the amountBase before dividing.
     * @param priceBaseUSD the base asset price in USD
     * @param priceQuoteUSD the quote asset price in USD
     * @param baseDecimals the base asset decimals
     * @param quoteDecimals the quote asset decimals
     * @param amountBase the amount of base asset
     */
    function _getValueInQuote(
        uint256 priceBaseUSD,
        uint256 priceQuoteUSD,
        uint8 baseDecimals,
        uint8 quoteDecimals,
        uint256 amountBase
    ) internal pure returns (uint256 valueInQuote) {
        // Get value in quote asset, but maintain as much precision as possible.
        // Cleaner equations below.
        // baseToUSD = amountBase * priceBaseUSD / 10**baseDecimals.
        // valueInQuote = baseToUSD * 10**quoteDecimals / priceQuoteUSD
        valueInQuote = amountBase.mulDivDown((priceBaseUSD * 10**quoteDecimals), (10**baseDecimals * priceQuoteUSD));
    }

    /**
     * @notice Attempted an operation with arrays of unequal lengths that were expected to be equal length.
     */
    error PriceRouter__LengthMismatch();

    /**
     * @notice Get the total value of multiple assets in terms of another asset.
     * @param baseAssets addresses of the assets to get the price of in terms of the quote asset
     * @param amounts amounts of each base asset to price
     * @param quoteAsset address of the assets that the base asset is priced in terms of
     * @return value total value of the amounts of each base assets specified in terms of the quote asset
     */
    function _getValues(
        ERC20[] calldata baseAssets,
        uint256[] calldata amounts,
        ERC20 quoteAsset,
        PriceCache[PRICE_CACHE_SIZE] memory cache
    ) internal view returns (uint256) {
        if (baseAssets.length != amounts.length) revert PriceRouter__LengthMismatch();
        uint256 quotePrice;
        {
            AssetSettings memory quoteSettings = getAssetSettings[quoteAsset];
            if (quoteSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(quoteAsset));
            quotePrice = _getPriceInUSD(quoteAsset, quoteSettings, cache);
        }
        uint256 valueInQuote;
        // uint256 price;
        uint8 quoteDecimals = quoteAsset.decimals();

        for (uint8 i = 0; i < baseAssets.length; i++) {
            // Skip zero amount values.
            if (amounts[i] == 0) continue;
            ERC20 baseAsset = baseAssets[i];
            if (baseAsset == quoteAsset) valueInQuote += amounts[i];
            else {
                uint256 basePrice;
                {
                    AssetSettings memory baseSettings = getAssetSettings[baseAsset];
                    if (baseSettings.derivative == 0) revert PriceRouter__UnsupportedAsset(address(baseAsset));
                    basePrice = _getPriceInUSD(baseAsset, baseSettings, cache);
                }
                valueInQuote += _getValueInQuote(
                    basePrice,
                    quotePrice,
                    baseAsset.decimals(),
                    quoteDecimals,
                    amounts[i]
                );
                // uint256 valueInUSD = (amounts[i].mulDivDown(price, 10**baseAsset.decimals()));
                // valueInQuote += valueInUSD.mulDivDown(10**quoteDecimals, quotePrice);
            }
        }
        return valueInQuote;
    }

    // =========================================== CHAINLINK PRICE DERIVATIVE ===========================================\
    /**
     * @notice Stores data for Chainlink derivative assets.
     * @param max the max valid price of the asset
     * @param min the min valid price of the asset
     * @param heartbeat the max amount of time between price updates
     * @param inETH bool indicating whether the price feed is
     *        denominated in ETH(true) or USD(false)
     */
    struct ChainlinkDerivativeStorage {
        uint144 max;
        uint80 min;
        uint24 heartbeat;
        bool inETH;
    }
    /**
     * @notice Returns Chainlink Derivative Storage
     */
    mapping(ERC20 => ChainlinkDerivativeStorage) public getChainlinkDerivativeStorage;

    /**
     * @notice If zero is specified for a Chainlink asset heartbeat, this value is used instead.
     */
    uint24 public constant DEFAULT_HEART_BEAT = 1 days;

    /**
     * @notice Setup function for pricing Chainlink derivative assets.
     * @dev _source The address of the Chainlink Data feed.
     * @dev _storage A ChainlinkDerivativeStorage value defining valid prices.
     */
    function _setupPriceForChainlinkDerivative(
        ERC20 _asset,
        address _source,
        bytes memory _storage
    ) internal {
        ChainlinkDerivativeStorage memory parameters = abi.decode(_storage, (ChainlinkDerivativeStorage));

        // Use Chainlink to get the min and max of the asset.
        IChainlinkAggregator aggregator = IChainlinkAggregator(IChainlinkAggregator(_source).aggregator());
        uint256 minFromChainklink = uint256(uint192(aggregator.minAnswer()));
        uint256 maxFromChainlink = uint256(uint192(aggregator.maxAnswer()));

        // Add a ~10% buffer to minimum and maximum price from Chainlink because Chainlink can stop updating
        // its price before/above the min/max price.
        uint256 bufferedMinPrice = (minFromChainklink * 1.1e18) / 1e18;
        uint256 bufferedMaxPrice = (maxFromChainlink * 0.9e18) / 1e18;

        if (parameters.min == 0) {
            // Revert if bufferedMinPrice overflows because uint80 is too small to hold the minimum price,
            // and lowering it to uint80 is not safe because the price feed can stop being updated before
            // it actually gets to that lower price.
            if (bufferedMinPrice > type(uint80).max) revert("Buffered Min Overflow");
            parameters.min = uint80(bufferedMinPrice);
        } else {
            if (parameters.min < bufferedMinPrice)
                revert PriceRouter__InvalidMinPrice(parameters.min, bufferedMinPrice);
        }

        if (parameters.max == 0) {
            //Do not revert even if bufferedMaxPrice is greater than uint144, because lowering it to uint144 max is more conservative.
            parameters.max = bufferedMaxPrice > type(uint144).max ? type(uint144).max : uint144(bufferedMaxPrice);
        } else {
            if (parameters.max > bufferedMaxPrice)
                revert PriceRouter__InvalidMaxPrice(parameters.max, bufferedMaxPrice);
        }

        if (parameters.min >= parameters.max)
            revert PriceRouter__MinPriceGreaterThanMaxPrice(parameters.min, parameters.max);

        parameters.heartbeat = parameters.heartbeat != 0 ? parameters.heartbeat : DEFAULT_HEART_BEAT;

        getChainlinkDerivativeStorage[_asset] = parameters;
    }

    /**
     * @notice Get the price of a Chainlink derivative in terms of USD.
     */
    function _getPriceForChainlinkDerivative(
        ERC20 _asset,
        address _source,
        PriceCache[PRICE_CACHE_SIZE] memory cache
    ) internal view returns (uint256) {
        ChainlinkDerivativeStorage memory parameters = getChainlinkDerivativeStorage[_asset];
        IChainlinkAggregator aggregator = IChainlinkAggregator(_source);
        (, int256 _price, , uint256 _timestamp, ) = aggregator.latestRoundData();
        uint256 price = _price.toUint256();
        _checkPriceFeed(address(_asset), price, _timestamp, parameters.max, parameters.min, parameters.heartbeat);
        // If price is in ETH, then convert price into USD.
        if (parameters.inETH) {
            uint256 _ethToUsd = _getPriceInUSD(WETH, getAssetSettings[WETH], cache);
            price = price.mulWadDown(_ethToUsd);
        }
        return price;
    }

    /**
     * @notice Attempted an operation to price an asset that under its minimum valid price.
     * @param asset address of the asset that is under its minimum valid price
     * @param price price of the asset
     * @param minPrice minimum valid price of the asset
     */
    error PriceRouter__AssetBelowMinPrice(address asset, uint256 price, uint256 minPrice);

    /**
     * @notice Attempted an operation to price an asset that under its maximum valid price.
     * @param asset address of the asset that is under its maximum valid price
     * @param price price of the asset
     * @param maxPrice maximum valid price of the asset
     */
    error PriceRouter__AssetAboveMaxPrice(address asset, uint256 price, uint256 maxPrice);

    /**
     * @notice Attempted to fetch a price for an asset that has not been updated in too long.
     * @param asset address of the asset thats price is stale
     * @param timeSinceLastUpdate seconds since the last price update
     * @param heartbeat maximum allowed time between price updates
     */
    error PriceRouter__StalePrice(address asset, uint256 timeSinceLastUpdate, uint256 heartbeat);

    /**
     * @notice helper function to validate a price feed is safe to use.
     * @param asset ERC20 asset price feed data is for.
     * @param value the price value the price feed gave.
     * @param timestamp the last timestamp the price feed was updated.
     * @param max the upper price bound
     * @param min the lower price bound
     * @param heartbeat the max amount of time between price updates
     */
    function _checkPriceFeed(
        address asset,
        uint256 value,
        uint256 timestamp,
        uint144 max,
        uint88 min,
        uint24 heartbeat
    ) internal view {
        if (value < min) revert PriceRouter__AssetBelowMinPrice(address(asset), value, min);

        if (value > max) revert PriceRouter__AssetAboveMaxPrice(address(asset), value, max);

        uint256 timeSinceLastUpdate = block.timestamp - timestamp;
        if (timeSinceLastUpdate > heartbeat)
            revert PriceRouter__StalePrice(address(asset), timeSinceLastUpdate, heartbeat);
    }

    // ======================================== CURVE VIRTUAL PRICE BOUND ========================================
    /**
     * @notice Curve virtual price is susceptible to re-entrancy attacks, if the attacker adds/removes pool liquidity,
     *         and re-enters into one of our contracts. To mitigate this, all curve pricing operations check
     *         the current `pool.get_virtual_price()` against logical bounds.
     * @notice These logical bounds are updated when `addAsset` is called, or Chainlink Automation detects that
     *         the bounds need to be updated, and that the gas price is reasonable.
     * @notice Once the on chain virtual price goes out of bounds, all pricing operations will revert for that Curve LP,
     *         which means any Cellars using that Curve LP are effectively frozen until the virtual price bounds are updated
     *         by Chainlink. If this is not happening in a timely manner( IE network is abnormally busy), the owner of this
     *         contract can raise the `gasConstant` to a value that better reflects the floor gas price of the network.
     *         Which will cause Chainlink nodes to update virtual price bounds faster.
     */

    /**
     * @param datum the virtual price to base posDelta and negDelta off of, 8 decimals
     * @param timeLastUpdated the timestamp this datum was updated
     * @param posDelta multipler >= 1e8 defining the logical upper bound for this virtual price, 8 decimals
     * @param negDelta multipler <= 1e8 defining the logical lower bound for this virtual price, 8 decimals
     * @param rateLimit the minimum amount of time that must pass between updates
     * @dev Curve virtual price values should update slowly, hence why this contract enforces a rate limit.
     * @dev During datum updates, the max/min new datum corresponds to the current upper/lower bound.
     */
    struct VirtualPriceBound {
        uint96 datum;
        uint64 timeLastUpdated;
        uint32 posDelta;
        uint32 negDelta;
        uint32 rateLimit;
    }

    /**
     * @notice Returns a Curve asset virtual price bound
     */
    mapping(address => VirtualPriceBound) public getVirtualPriceBound;

    /**
     * @dev If ZERO is specified for an assets `rateLimit` this value is used instead.
     */
    uint32 public constant DEFAULT_RATE_LIMIT = 1 days;

    /**
     * @notice Chainlink Fast Gas Feed for ETH Mainnet.
     */
    address public ETH_FAST_GAS_FEED = 0x169E633A2D1E6c10dD91238Ba11c4A708dfEF37C;

    /**
     * @notice Allows owner to set a new gas feed.
     * @notice Can be set to zero address to skip gas check.
     */
    function setGasFeed(address gasFeed) external onlyOwner {
        ETH_FAST_GAS_FEED = gasFeed;
    }

    /**
     * @notice Dictates how aggressive keepers are with updating Curve pool virtual price values.
     * @dev A larger `gasConstant` will raise the `gasPriceLimit`, while a smaller `gasConstant`
     *      will lower the `gasPriceLimit`.
     */
    uint256 public gasConstant = 200e9;

    /**
     * @notice Allows owner to set a new gas constant.
     */
    function setGasConstant(uint256 newConstant) external onlyOwner {
        gasConstant = newConstant;
    }

    /**
     * @notice Dictates the minimum delta required for an upkeep.
     * @dev If the max delta found is less than this, then checkUpkeep returns false.
     */
    uint256 public minDelta = 0.05e18;

    /**
     * @notice Allows owner to set a new minimum delta.
     */
    function setMinDelta(uint256 newMinDelta) external onlyOwner {
        minDelta = newMinDelta;
    }

    /**
     * @notice Stores all Curve Assets this contract prices, so Automation can loop through it.
     */
    address[] public curveAssets;

    /**
     * @notice Allows owner to update a Curve asset's virtual price parameters..
     */
    function updateVirtualPriceBound(
        address _asset,
        uint32 _posDelta,
        uint32 _negDelta,
        uint32 _rateLimit
    ) external onlyOwner {
        VirtualPriceBound storage vpBound = getVirtualPriceBound[_asset];
        vpBound.posDelta = _posDelta;
        vpBound.negDelta = _negDelta;
        vpBound.rateLimit = _rateLimit == 0 ? DEFAULT_RATE_LIMIT : _rateLimit;
    }

    /**
     * @notice Logic ran by Chainlink Automation to determine if virtual price bounds need to be updated.
     * @dev `checkData` should be a start and end value indicating where to start and end in the `curveAssets` array.
     * @dev The end index can be zero, or greater than the current length of `curveAssets`.
     *      Doing this makes end = curveAssets.length.
     * @dev `performData` is the target index in `curveAssets` that needs its bounds updated.
     */
    function _checkVirtualPriceBound(bytes memory checkData)
        internal
        view
        returns (bool upkeepNeeded, bytes memory performData)
    {
        // Decode checkData to get start and end index.
        (uint256 start, uint256 end) = abi.decode(checkData, (uint256, uint256));
        if (end == 0 || end > curveAssets.length) end = curveAssets.length;

        // Loop through all curve assets, and find the asset with the largest delta(the one that needs to be updated the most).
        uint256 maxDelta;
        uint256 targetIndex;
        for (uint256 i = start; i < end; i++) {
            address asset = curveAssets[i];
            VirtualPriceBound memory vpBound = getVirtualPriceBound[asset];

            // Check to see if this virtual price was updated recently.
            if ((block.timestamp - vpBound.timeLastUpdated) < vpBound.rateLimit) continue;

            // Check current virtual price against upper and lower bounds to find the delta.
            uint256 currentVirtualPrice = ICurvePool(getAssetSettings[ERC20(asset)].source).get_virtual_price();
            currentVirtualPrice = currentVirtualPrice.changeDecimals(18, 8);
            uint256 delta;
            if (currentVirtualPrice > vpBound.datum) {
                uint256 upper = uint256(vpBound.datum).mulDivDown(vpBound.posDelta, 1e8);
                uint256 ceiling = upper - vpBound.datum;
                uint256 current = currentVirtualPrice - vpBound.datum;
                delta = _getDelta(ceiling, current);
            } else {
                uint256 lower = uint256(vpBound.datum).mulDivDown(vpBound.negDelta, 1e8);
                uint256 ceiling = vpBound.datum - lower;
                uint256 current = vpBound.datum - currentVirtualPrice;
                delta = _getDelta(ceiling, current);
            }
            // Save the largest delta for the upkeep.
            if (delta > maxDelta) {
                maxDelta = delta;
                targetIndex = i;
            }
        }

        // If the largest delta must be greater/equal to `minDelta` to continue.
        if (maxDelta >= minDelta) {
            // If gas feed is not set, skip the gas check.
            if (ETH_FAST_GAS_FEED == address(0)) {
                // No Gas Check needed.
                upkeepNeeded = true;
                performData = abi.encode(targetIndex);
            } else {
                // Run a gas check to determine if it makes sense to update the target curve asset.
                uint256 gasPriceLimit = gasConstant.mulDivDown(maxDelta**3, 1e54); // 54 comes from 18 * 3.
                uint256 currentGasPrice = uint256(IChainlinkAggregator(ETH_FAST_GAS_FEED).latestAnswer());
                if (currentGasPrice <= gasPriceLimit) {
                    upkeepNeeded = true;
                    performData = abi.encode(targetIndex);
                }
            }
        }
    }

    /**
     * @notice Attempted to call a function only the Chainlink Registry can call.
     */
    error PriceRouter__OnlyAutomationRegistry();

    /**
     * @notice Attempted to update a virtual price too soon.
     */
    error PriceRouter__VirtualPriceRateLimiter();

    /**
     * @notice Attempted to update a virtual price bound that did not need to be updated.
     */
    error PriceRouter__NothingToUpdate();

    /**
     * @notice Chainlink's Automation Registry contract address.
     */
    address public automationRegistry = 0x02777053d6764996e594c3E88AF1D58D5363a2e6;

    /**
     * @notice Allows owner to update the Automation Registry.
     * @dev In rare cases, Chainlink's registry CAN change.
     */
    function setAutomationRegistry(address newRegistry) external onlyOwner {
        automationRegistry = newRegistry;
    }

    /**
     * @notice Curve virtual price is susceptible to re-entrancy attacks, if the attacker adds/removes pool liquidity.
     *         To stop this we check the virtual price against logical bounds.
     * @dev Only the chainlink registry can call this function, so we know that Chainlink nodes will not be
     *      re-entering into the Curve pool, so it is safe to use the current on chain virtual price.
     * @notice Updating the virtual price is rate limited by `VirtualPriceBound.raetLimit` and can only be
     *         updated at most to the lower or upper bound of the current datum.
     *         This is intentional since curve pool price should not be volatile, and if they are, then
     *         we WANT that Curve LP pools TX pricing to revert.
     */
    function _updateVirtualPriceBound(bytes memory performData) internal {
        // Make sure only the Automation Registry can call this function.
        if (msg.sender != automationRegistry) revert PriceRouter__OnlyAutomationRegistry();

        // Grab the target index from performData.
        uint256 index = abi.decode(performData, (uint256));
        address asset = curveAssets[index];
        VirtualPriceBound storage vpBound = getVirtualPriceBound[asset];

        // Enfore rate limit check.
        if ((block.timestamp - vpBound.timeLastUpdated) < vpBound.rateLimit)
            revert PriceRouter__VirtualPriceRateLimiter();

        // Determine what the new Datum should be.
        uint256 currentVirtualPrice = ICurvePool(getAssetSettings[ERC20(asset)].source).get_virtual_price();
        currentVirtualPrice = currentVirtualPrice.changeDecimals(18, 8);
        if (currentVirtualPrice > vpBound.datum) {
            uint256 upper = uint256(vpBound.datum).mulDivDown(vpBound.posDelta, 1e8);
            vpBound.datum = uint96(currentVirtualPrice > upper ? upper : currentVirtualPrice);
        } else if (currentVirtualPrice < vpBound.datum) {
            uint256 lower = uint256(vpBound.datum).mulDivDown(vpBound.negDelta, 1e8);
            vpBound.datum = uint96(currentVirtualPrice < lower ? lower : currentVirtualPrice);
        } else {
            revert PriceRouter__NothingToUpdate();
        }

        // Update the stored timestamp.
        vpBound.timeLastUpdated = uint64(block.timestamp);
    }

    /**
     * @notice Returns a percent delta representing where `current` is in reference to `ceiling`.
     * Example, if current == 0, this would return a 0.
     *          if current == ceiling, this would return a 1e18.
     *          if current == (ceiling) / 2, this would return 0.5e18.
     */
    function _getDelta(uint256 ceiling, uint256 current) internal pure returns (uint256) {
        return current.mulDivDown(1e18, ceiling);
    }

    /**
     * @notice Attempted to price a curve asset that was below its logical minimum price.
     */
    error PriceRouter__CurrentBelowLowerBound(uint256 current, uint256 lower);

    /**
     * @notice Attempted to price a curve asset that was above its logical maximum price.
     */
    error PriceRouter__CurrentAboveUpperBound(uint256 current, uint256 upper);

    /**
     * @notice Enforces a logical price bound on Curve pool tokens.
     */
    function _checkBounds(
        uint256 lower,
        uint256 upper,
        uint256 current
    ) internal pure {
        if (current < lower) revert PriceRouter__CurrentBelowLowerBound(current, lower);
        if (current > upper) revert PriceRouter__CurrentAboveUpperBound(current, upper);
    }

    // =========================================== CURVE PRICE DERIVATIVE ===========================================
    /**
     * @notice Curve Derivative Storage
     * @dev Stores an array of the underlying token addresses in the curve pool.
     */
    mapping(ERC20 => address[]) public getCurveDerivativeStorage;

    /**
     * @notice Setup function for pricing Curve derivative assets.
     * @dev _source The address of the Curve Pool.
     * @dev _storage A VirtualPriceBound value for this asset.
     * @dev Assumes that curve pools never add or remove tokens.
     */
    function _setupPriceForCurveDerivative(
        ERC20 _asset,
        address _source,
        bytes memory _storage
    ) internal {
        ICurvePool pool = ICurvePool(_source);
        uint8 coinsLength = 0;
        // Figure out how many tokens are in the curve pool.
        while (true) {
            try pool.coins(coinsLength) {
                coinsLength++;
            } catch {
                break;
            }
        }

        // Save the pools tokens to reduce gas for pricing calls.
        address[] memory coins = new address[](coinsLength);
        for (uint256 i = 0; i < coinsLength; i++) {
            coins[i] = pool.coins(i);
        }

        getCurveDerivativeStorage[_asset] = coins;

        curveAssets.push(address(_asset));

        // Setup virtual price bound.
        VirtualPriceBound memory vpBound = abi.decode(_storage, (VirtualPriceBound));
        uint256 upper = uint256(vpBound.datum).mulDivDown(vpBound.posDelta, 1e8);
        upper = upper.changeDecimals(8, 18);
        uint256 lower = uint256(vpBound.datum).mulDivDown(vpBound.negDelta, 1e8);
        lower = lower.changeDecimals(8, 18);
        _checkBounds(lower, upper, pool.get_virtual_price());
        if (vpBound.rateLimit == 0) vpBound.rateLimit = DEFAULT_RATE_LIMIT;
        vpBound.timeLastUpdated = uint64(block.timestamp);
        getVirtualPriceBound[address(_asset)] = vpBound;
    }

    /**
     * @notice Get the price of a CurveV1 derivative in terms of USD.
     */
    function _getPriceForCurveDerivative(
        ERC20 asset,
        address _source,
        PriceCache[PRICE_CACHE_SIZE] memory cache
    ) internal view returns (uint256 price) {
        ICurvePool pool = ICurvePool(_source);

        address[] memory coins = getCurveDerivativeStorage[asset];

        uint256 minPrice = type(uint256).max;
        for (uint256 i = 0; i < coins.length; i++) {
            ERC20 poolAsset = ERC20(coins[i]);
            uint256 tokenPrice = _getPriceInUSD(poolAsset, getAssetSettings[poolAsset], cache);
            if (tokenPrice < minPrice) minPrice = tokenPrice;
        }

        if (minPrice == type(uint256).max) revert("Min price not found.");

        // Check that virtual price is within bounds.
        uint256 virtualPrice = pool.get_virtual_price();
        VirtualPriceBound memory vpBound = getVirtualPriceBound[address(asset)];
        uint256 upper = uint256(vpBound.datum).mulDivDown(vpBound.posDelta, 1e8);
        upper = upper.changeDecimals(8, 18);
        uint256 lower = uint256(vpBound.datum).mulDivDown(vpBound.negDelta, 1e8);
        lower = lower.changeDecimals(8, 18);
        _checkBounds(lower, upper, virtualPrice);

        // Virtual price is based off the Curve Token decimals.
        uint256 curveTokenDecimals = ERC20(asset).decimals();
        price = minPrice.mulDivDown(virtualPrice, 10**curveTokenDecimals);
    }

    // =========================================== CURVEV2 PRICE DERIVATIVE ===========================================

    /**
     * @notice Setup function for pricing CurveV2 derivative assets.
     * @dev _source The address of the CurveV2 Pool.
     * @dev _storage A VirtualPriceBound value for this asset.
     * @dev Assumes that curve pools never add or remove tokens.
     */
    function _setupPriceForCurveV2Derivative(
        ERC20 _asset,
        address _source,
        bytes memory _storage
    ) internal {
        ICurvePool pool = ICurvePool(_source);
        uint8 coinsLength = 0;
        // Figure out how many tokens are in the curve pool.
        while (true) {
            try pool.coins(coinsLength) {
                coinsLength++;
            } catch {
                break;
            }
        }
        address[] memory coins = new address[](coinsLength);
        for (uint256 i = 0; i < coinsLength; i++) {
            coins[i] = pool.coins(i);
        }

        getCurveDerivativeStorage[_asset] = coins;

        curveAssets.push(address(_asset));

        // Setup virtual price bound.
        VirtualPriceBound memory vpBound = abi.decode(_storage, (VirtualPriceBound));
        uint256 upper = uint256(vpBound.datum).mulDivDown(vpBound.posDelta, 1e8);
        upper = upper.changeDecimals(8, 18);
        uint256 lower = uint256(vpBound.datum).mulDivDown(vpBound.negDelta, 1e8);
        lower = lower.changeDecimals(8, 18);
        _checkBounds(lower, upper, pool.get_virtual_price());
        if (vpBound.rateLimit == 0) vpBound.rateLimit = DEFAULT_RATE_LIMIT;
        vpBound.timeLastUpdated = uint64(block.timestamp);
        getVirtualPriceBound[address(_asset)] = vpBound;
    }

    uint256 private constant GAMMA0 = 28000000000000;
    uint256 private constant A0 = 2 * 3**3 * 10000;
    uint256 private constant DISCOUNT0 = 1087460000000000;

    // x has 36 decimals
    // result has 18 decimals.
    function _cubicRoot(uint256 x) internal pure returns (uint256) {
        uint256 D = x / 1e18;
        for (uint8 i; i < 256; i++) {
            uint256 diff;
            uint256 D_prev = D;
            D = (D * (2 * 1e18 + ((((x / D) * 1e18) / D) * 1e18) / D)) / (3 * 1e18);
            if (D > D_prev) diff = D - D_prev;
            else diff = D_prev - D;
            if (diff <= 1 || diff * 10**18 < D) return D;
        }
        revert("Did not converge");
    }

    /**
     * Inspired by https://etherscan.io/address/0xE8b2989276E2Ca8FDEA2268E3551b2b4B2418950#code
     * @notice Get the price of a CurveV1 derivative in terms of USD.
     */
    function _getPriceForCurveV2Derivative(
        ERC20 asset,
        address _source,
        PriceCache[PRICE_CACHE_SIZE] memory cache
    ) internal view returns (uint256) {
        ICurvePool pool = ICurvePool(_source);

        // Check that virtual price is within bounds.
        uint256 virtualPrice = pool.get_virtual_price();
        VirtualPriceBound memory vpBound = getVirtualPriceBound[address(asset)];
        uint256 upper = uint256(vpBound.datum).mulDivDown(vpBound.posDelta, 1e8);
        upper = upper.changeDecimals(8, 18);
        uint256 lower = uint256(vpBound.datum).mulDivDown(vpBound.negDelta, 1e8);
        lower = lower.changeDecimals(8, 18);
        _checkBounds(lower, upper, virtualPrice);

        address[] memory coins = getCurveDerivativeStorage[asset];
        ERC20 token0 = ERC20(coins[0]);
        if (coins.length == 2) {
            return pool.lp_price().mulDivDown(_getPriceInUSD(token0, getAssetSettings[token0], cache), 1e18);
        } else if (coins.length == 3) {
            uint256 t1Price = pool.price_oracle(0);
            uint256 t2Price = pool.price_oracle(1);

            uint256 maxPrice = (3 * virtualPrice * _cubicRoot(t1Price * t2Price)) / 1e18;
            {
                uint256 g = pool.gamma().mulDivDown(1e18, GAMMA0);
                uint256 a = pool.A().mulDivDown(1e18, A0);
                uint256 coefficient = (g**2 / 1e18) * a;
                uint256 discount = coefficient > 1e34 ? coefficient : 1e34;
                discount = _cubicRoot(discount).mulDivDown(DISCOUNT0, 1e18);

                maxPrice -= maxPrice.mulDivDown(discount, 1e18);
            }
            return maxPrice.mulDivDown(_getPriceInUSD(token0, getAssetSettings[token0], cache), 1e18);
        } else revert("Unsupported Pool");
    }

    // =========================================== AAVE PRICE DERIVATIVE ===========================================
    /**
     * @notice Aave Derivative Storage
     */
    mapping(ERC20 => ERC20) public getAaveDerivativeStorage;

    /**
     * @notice Setup function for pricing Aave derivative assets.
     * @dev _source The address of the aToken.
     * @dev _storage is not used.
     */
    function _setupPriceForAaveDerivative(
        ERC20 _asset,
        address _source,
        bytes memory
    ) internal {
        IAaveToken aToken = IAaveToken(_source);
        getAaveDerivativeStorage[_asset] = ERC20(aToken.UNDERLYING_ASSET_ADDRESS());
    }

    /**
     * @notice Get the price of an Aave derivative in terms of USD.
     */
    function _getPriceForAaveDerivative(
        ERC20 asset,
        address,
        PriceCache[PRICE_CACHE_SIZE] memory cache
    ) internal view returns (uint256) {
        asset = getAaveDerivativeStorage[asset];
        return _getPriceInUSD(asset, getAssetSettings[asset], cache);
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

import { ERC20, SafeTransferLib } from "src/base/ERC4626.sol";
import { Multicall } from "src/base/Multicall.sol";
import { IUniswapV2Router02 as IUniswapV2Router } from "src/interfaces/external/IUniswapV2Router02.sol";
import { IUniswapV3Router } from "src/interfaces/external/IUniswapV3Router.sol";

/**
 * @title Sommelier Swap Router
 * @notice Provides a universal interface allowing Sommelier contracts to interact with multiple
 *         different exchanges to perform swaps.
 * @dev Perform multiple swaps using Multicall.
 * @author crispymangoes, Brian Le
 */
contract SwapRouter is Multicall {
    using SafeTransferLib for ERC20;

    /**
     * @param UNIV2 Uniswap V2
     * @param UNIV3 Uniswap V3
     */
    enum Exchange {
        UNIV2,
        UNIV3
    }

    /**
     * @notice Get the selector of the function to call in order to perform swap with a given exchange.
     */
    mapping(Exchange => bytes4) public getExchangeSelector;

    // ========================================== CONSTRUCTOR ==========================================

    /**
     * @notice Uniswap V2 swap router contract.
     */
    IUniswapV2Router public immutable uniswapV2Router; // 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D

    /**
     * @notice Uniswap V3 swap router contract.
     */
    IUniswapV3Router public immutable uniswapV3Router; // 0xE592427A0AEce92De3Edee1F18E0157C05861564

    /**
     * @param _uniswapV2Router address of the Uniswap V2 swap router contract
     * @param _uniswapV3Router address of the Uniswap V3 swap router contract
     */
    constructor(IUniswapV2Router _uniswapV2Router, IUniswapV3Router _uniswapV3Router) {
        // Set up all exchanges.
        uniswapV2Router = _uniswapV2Router;
        uniswapV3Router = _uniswapV3Router;

        // Set up mapping between IDs and selectors.
        getExchangeSelector[Exchange.UNIV2] = SwapRouter(this).swapWithUniV2.selector;
        getExchangeSelector[Exchange.UNIV3] = SwapRouter(this).swapWithUniV3.selector;
    }

    // ======================================= SWAP OPERATIONS =======================================

    /**
     * @notice Attempted to perform a swap that reverted without a message.
     */
    error SwapRouter__SwapReverted();

    /**
     * @notice Attempted to perform a swap with mismatched assetIn and swap data.
     * @param actual the address encoded into the swap data
     * @param expected the address passed in with assetIn
     */
    error SwapRouter__AssetInMisMatch(address actual, address expected);

    /**
     * @notice Attempted to perform a swap with mismatched assetOut and swap data.
     * @param actual the address encoded into the swap data
     * @param expected the address passed in with assetIn
     */
    error SwapRouter__AssetOutMisMatch(address actual, address expected);

    /**
     * @notice Perform a swap using a supported exchange.
     * @param exchange value dictating which exchange to use to make the swap
     * @param swapData encoded data used for the swap
     * @param receiver address to send the received assets to
     * @return amountOut amount of assets received from the swap
     */
    function swap(
        Exchange exchange,
        bytes memory swapData,
        address receiver,
        ERC20 assetIn,
        ERC20 assetOut
    ) external returns (uint256 amountOut) {
        // Route swap call to appropriate function using selector.
        (bool success, bytes memory result) = address(this).delegatecall(
            abi.encodeWithSelector(getExchangeSelector[exchange], swapData, receiver, assetIn, assetOut)
        );

        if (!success) {
            // If there is return data, the call reverted with a reason or a custom error so we
            // bubble up the error message.
            if (result.length > 0) {
                assembly {
                    let returndata_size := mload(result)
                    revert(add(32, result), returndata_size)
                }
            } else {
                revert SwapRouter__SwapReverted();
            }
        }

        amountOut = abi.decode(result, (uint256));
    }

    /**
     * @notice Perform a swap using Uniswap V2.
     * @param swapData bytes variable storing the following swap information:
     *      address[] path: array of addresses dictating what swap path to follow
     *      uint256 amount: amount of the first asset in the path to swap
     *      uint256 amountOutMin: the minimum amount of the last asset in the path to receive
     * @param receiver address to send the received assets to
     * @return amountOut amount of assets received from the swap
     */
    function swapWithUniV2(
        bytes memory swapData,
        address receiver,
        ERC20 assetIn,
        ERC20 assetOut
    ) public returns (uint256 amountOut) {
        (address[] memory path, uint256 amount, uint256 amountOutMin) = abi.decode(
            swapData,
            (address[], uint256, uint256)
        );

        // Check that path matches assetIn and assetOut.
        if (assetIn != ERC20(path[0])) revert SwapRouter__AssetInMisMatch(path[0], address(assetIn));
        if (assetOut != ERC20(path[path.length - 1]))
            revert SwapRouter__AssetOutMisMatch(path[path.length - 1], address(assetOut));

        // Transfer assets to this contract to swap.
        assetIn.safeTransferFrom(msg.sender, address(this), amount);

        // Approve assets to be swapped through the router.
        assetIn.safeApprove(address(uniswapV2Router), amount);

        // Execute the swap.
        uint256[] memory amountsOut = uniswapV2Router.swapExactTokensForTokens(
            amount,
            amountOutMin,
            path,
            receiver,
            block.timestamp + 60
        );

        amountOut = amountsOut[amountsOut.length - 1];

        _checkApprovalIsZero(assetIn, address(uniswapV2Router));
    }

    /**
     * @notice Perform a swap using Uniswap V3.
     * @param swapData bytes variable storing the following swap information
     *      address[] path: array of addresses dictating what swap path to follow
     *      uint24[] poolFees: array of pool fees dictating what swap pools to use
     *      uint256 amount: amount of the first asset in the path to swap
     *      uint256 amountOutMin: the minimum amount of the last asset in the path to receive
     * @param receiver address to send the received assets to
     * @return amountOut amount of assets received from the swap
     */
    function swapWithUniV3(
        bytes memory swapData,
        address receiver,
        ERC20 assetIn,
        ERC20 assetOut
    ) public returns (uint256 amountOut) {
        (address[] memory path, uint24[] memory poolFees, uint256 amount, uint256 amountOutMin) = abi.decode(
            swapData,
            (address[], uint24[], uint256, uint256)
        );

        // Check that path matches assetIn and assetOut.
        if (assetIn != ERC20(path[0])) revert SwapRouter__AssetInMisMatch(path[0], address(assetIn));
        if (assetOut != ERC20(path[path.length - 1]))
            revert SwapRouter__AssetOutMisMatch(path[path.length - 1], address(assetOut));

        // Transfer assets to this contract to swap.
        assetIn.safeTransferFrom(msg.sender, address(this), amount);

        // Approve assets to be swapped through the router.
        assetIn.safeApprove(address(uniswapV3Router), amount);

        // Encode swap parameters.
        bytes memory encodePackedPath = abi.encodePacked(address(assetIn));
        for (uint256 i = 1; i < path.length; i++)
            encodePackedPath = abi.encodePacked(encodePackedPath, poolFees[i - 1], path[i]);

        // Execute the swap.
        amountOut = uniswapV3Router.exactInput(
            IUniswapV3Router.ExactInputParams({
                path: encodePackedPath,
                recipient: receiver,
                deadline: block.timestamp + 60,
                amountIn: amount,
                amountOutMinimum: amountOutMin
            })
        );

        _checkApprovalIsZero(assetIn, address(uniswapV3Router));
    }

    // ======================================= HELPER FUNCTIONS =======================================
    /**
     * @notice Emitted when a swap does not use all the assets swap router approved.
     */
    error SwapRouter__UnusedApproval();

    /**
     * @notice Helper function that reverts if the Swap Router has unused approval after a swap is made.
     */
    function _checkApprovalIsZero(ERC20 asset, address spender) internal view {
        if (asset.allowance(address(this), spender) != 0) revert SwapRouter__UnusedApproval();
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

library Math {
    /**
     * @notice Substract with a floor of 0 for the result.
     */
    function subMinZero(uint256 x, uint256 y) internal pure returns (uint256) {
        return x > y ? x - y : 0;
    }

    /**
     * @notice Used to change the decimals of precision used for an amount.
     */
    function changeDecimals(
        uint256 amount,
        uint8 fromDecimals,
        uint8 toDecimals
    ) internal pure returns (uint256) {
        if (fromDecimals == toDecimals) {
            return amount;
        } else if (fromDecimals < toDecimals) {
            return amount * 10**(toDecimals - fromDecimals);
        } else {
            return amount / 10**(fromDecimals - toDecimals);
        }
    }

    // ===================================== OPENZEPPELIN'S MATH =====================================

    function min(uint256 a, uint256 b) internal pure returns (uint256) {
        return a < b ? a : b;
    }

    // ================================= SOLMATE's FIXEDPOINTMATHLIB =================================

    uint256 public constant WAD = 1e18; // The scalar of ETH and most ERC20s.

    function mulWadDown(uint256 x, uint256 y) internal pure returns (uint256) {
        return mulDivDown(x, y, WAD); // Equivalent to (x * y) / WAD rounded down.
    }

    function mulDivDown(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // Divide z by the denominator.
            z := div(z, denominator)
        }
    }

    function mulDivUp(
        uint256 x,
        uint256 y,
        uint256 denominator
    ) internal pure returns (uint256 z) {
        assembly {
            // Store x * y in z for now.
            z := mul(x, y)

            // Equivalent to require(denominator != 0 && (x == 0 || (x * y) / x == y))
            if iszero(and(iszero(iszero(denominator)), or(iszero(x), eq(div(z, x), y)))) {
                revert(0, 0)
            }

            // First, divide z - 1 by the denominator and add 1.
            // We allow z - 1 to underflow if z is 0, because we multiply the
            // end result by 0 if z is zero, ensuring we return 0 if z is zero.
            z := mul(iszero(iszero(z)), add(div(sub(z, 1), denominator), 1))
        }
    }
}

// SPDX-License-Identifier: Apache-2.0
pragma solidity 0.8.16;

/**
 * @notice A library to extend the uint32 array data type.
 */
library Uint32Array {
    // =========================================== ADDRESS STORAGE ===========================================

    /**
     * @notice Add an uint32 to the array at a given index.
     * @param array uint32 array to add the uint32 to
     * @param index index to add the uint32 at
     * @param value uint32 to add to the array
     */
    function add(
        uint32[] storage array,
        uint32 index,
        uint32 value
    ) internal {
        uint256 len = array.length;

        if (len > 0) {
            array.push(array[len - 1]);

            for (uint256 i = len - 1; i > index; i--) array[i] = array[i - 1];

            array[index] = value;
        } else {
            array.push(value);
        }
    }

    /**
     * @notice Remove a uint32 from the array at a given index.
     * @param array uint32 array to remove the uint32 from
     * @param index index to remove the uint32 at
     */
    function remove(uint32[] storage array, uint32 index) internal {
        uint256 len = array.length;

        require(index < len, "Index out of bounds");

        for (uint256 i = index; i < len - 1; i++) array[i] = array[i + 1];

        array.pop();
    }

    /**
     * @notice Check whether an array contains an uint32.
     * @param array uint32 array to check
     * @param value uint32 to check for
     */
    function contains(uint32[] storage array, uint32 value) internal view returns (bool) {
        for (uint256 i; i < array.length; i++) if (value == array[i]) return true;

        return false;
    }
}

{
  "remappings": [
    "@chainlink/=lib/chainlink/",
    "@compound/=lib/compound-protocol/contracts/",
    "@ds-test/=lib/forge-std/lib/ds-test/src/",
    "@ensdomains/=node_modules/@ensdomains/",
    "@forge-std/=lib/forge-std/src/",
    "@openzeppelin/=lib/openzeppelin-contracts/",
    "@solmate/=lib/solmate/src/",
    "@uniswap/v3-core/=lib/v3-core/",
    "@uniswap/v3-periphery/=lib/v3-periphery/",
    "@uniswapV3C/=lib/v3-core.git/contracts/",
    "@uniswapV3P/=lib/v3-periphery.git/contracts/",
    "chainlink/=lib/chainlink/contracts/src/v0.8/dev/vendor/@arbitrum/nitro-contracts/src/",
    "compound-protocol/=lib/compound-protocol/",
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "eth-gas-reporter/=node_modules/eth-gas-reporter/",
    "forge-std/=lib/forge-std/src/",
    "hardhat/=node_modules/hardhat/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/",
    "solmate/=lib/solmate/src/",
    "v3-core.git/=lib/v3-core.git/contracts/",
    "v3-periphery.git/=lib/v3-periphery.git/contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "london",
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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0000000000000000000000002cbd27e034fee53f79b607430da7771b22050741

-----Decoded View---------------
Arg [0] : _registry (address): 0x2Cbd27E034FEE53f79b607430dA7771B22050741

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000002cbd27e034fee53f79b607430da7771b22050741