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// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17;

import "../../ZivoeLocker.sol";

import "../../../lib/openzeppelin-contracts/contracts/security/ReentrancyGuard.sol";

interface IZivoeGlobals_OCE_ZVE {
    /// @notice Returns the address of the ZivoeRewards ($zJTT) contract.
    function stJTT() external view returns (address);

    /// @notice Returns the address of the ZivoeRewards ($zSTT) contract.
    function stSTT() external view returns (address);

    /// @notice Returns the address of the ZivoeRewards ($ZVE) contract.
    function stZVE() external view returns (address);

    /// @notice Returns the address of the Timelock contract.
    function TLC() external view returns (address);

    /// @notice Returns the address of the ZivoeToken contract.
    function ZVE() external view returns (address);
}

interface IZivoeRewards_OCE_ZVE {
    /// @notice Deposits a reward to this contract for distribution.
    /// @param _rewardsToken The asset that's being distributed.
    /// @param reward The amount of the _rewardsToken to deposit.
    function depositReward(address _rewardsToken, uint256 reward) external;
}



/// @notice This contract facilitates an exponential decay emissions schedule for $ZVE.
///         This contract has the following responsibilities:
///           - Handles accounting (with governable variables) to support emissions schedule.
///           - Forwards $ZVE to all ZivoeRewards contracts at will (stZVE, stSTT, stJTT).
contract OCE_ZVE is ZivoeLocker, ReentrancyGuard {
    
    using SafeERC20 for IERC20;

    // ---------------------
    //    State Variables
    // ---------------------

    address public immutable GBL;           /// @dev The ZivoeGlobals contract.

    uint256 public exponentialDecayPerSecond = RAY * 99999999 / 100000000;    /// @dev The rate of decay per second.
    uint256 public lastDistribution;        /// @dev The block.timestamp value of last distribution.

    /// @dev Determines distribution between rewards contract, in BIPS.
    /// @dev Sum of distributionRatioBIPS[0], distributionRatioBIPS[1], and distributionRatioBIPS[2] must equal BIPS.
    ///      distributionRatioBIPS[0] => stZVE
    ///      distributionRatioBIPS[1] => stSTT
    ///      distributionRatioBIPS[2] => stJTT
    uint256[3] public distributionRatioBIPS;

    uint256 private constant BIPS = 10000;
    uint256 private constant RAY = 10 ** 27;



    // -----------------
    //    Constructor
    // -----------------

    /// @notice Initializes the OCE_ZVE contract.
    /// @param DAO The administrator of this contract (intended to be ZivoeDAO).
    /// @param _GBL The ZivoeGlobals contract.
    constructor(address DAO, address _GBL) {
        transferOwnershipAndLock(DAO);
        GBL = _GBL;
        lastDistribution = block.timestamp;

        distributionRatioBIPS[0] = 3334;
        distributionRatioBIPS[1] = 3333;
        distributionRatioBIPS[2] = 3333;
    }



    // ------------
    //    Events
    // ------------

    /// @notice Emitted during updateDistributionRatioBIPS().
    /// @param  oldRatios The old distribution ratios.
    /// @param  newRatios The new distribution ratios.
    event UpdatedDistributionRatioBIPS(uint256[3] oldRatios, uint256[3] newRatios);

    /// @notice Emitted during forwardEmissions().
    /// @param  stZVE The amount of $ZVE emitted to the $ZVE rewards contract.
    /// @param  stJTT The amount of $ZVE emitted to the $zJTT rewards contract.
    /// @param  stSTT The amount of $ZVE emitted to the $zSTT rewards contract.
    event EmissionsForwarded(uint256 stZVE, uint256 stJTT, uint256 stSTT);

    /// @notice Emitted during updateExponentialDecayPerSecond().
    /// @param  oldValue The old value of exponentialDecayPerSecond.
    /// @param  newValue The new value of exponentialDecayPerSecond.
    event UpdatedExponentialDecayPerSecond(uint256 oldValue, uint256 newValue);



    // ---------------
    //    Functions
    // ---------------

    /// @notice Permission for owner to call pushToLocker().
    function canPush() public override pure returns (bool) { return true; }

    /// @notice Permission for owner to call pullFromLocker().
    function canPull() public override pure returns (bool) { return true; }

    /// @notice Permission for owner to call pullFromLockerPartial().
    function canPullPartial() public override pure returns (bool) { return true; }

    /// @notice Allocates ZVE from the DAO to this locker for emissions.
    /// @dev    Only callable by the DAO.
    /// @param  asset The asset to push to this locker (in this case $ZVE).
    /// @param  amount The amount of $ZVE to push to this locker.
    /// @param  data Accompanying transaction data.
    function pushToLocker(address asset, uint256 amount, bytes calldata data) external override onlyOwner {
        require(
            asset == IZivoeGlobals_OCE_ZVE(GBL).ZVE(), 
            "OCE_ZVE::pushToLocker() asset != IZivoeGlobals_OCE_ZVE(GBL).ZVE()"
        );
        IERC20(asset).safeTransferFrom(owner(), address(this), amount);
    }

    /// @notice Forwards $ZVE available for distribution.
    function forwardEmissions() external nonReentrant {
        uint zveBalance = IERC20(IZivoeGlobals_OCE_ZVE(GBL).ZVE()).balanceOf(address(this));
        _forwardEmissions(zveBalance - decay(zveBalance, block.timestamp - lastDistribution));
        lastDistribution = block.timestamp;
    }

    /// @notice This handles the accounting for forwarding ZVE to lockers privately.
    /// @param amount The amount of $ZVE to distribute.
    function _forwardEmissions(uint256 amount) private {
        require(amount >= 100 ether, "OCE_ZVE::_forwardEmissions amount < 100 ether");

        uint amountZero = amount * distributionRatioBIPS[0] / BIPS;
        uint amountOne = amount * distributionRatioBIPS[1] / BIPS;
        uint amountTwo = amount * distributionRatioBIPS[2] / BIPS;
        address ZVE = IZivoeGlobals_OCE_ZVE(GBL).ZVE();
        address stZVE = IZivoeGlobals_OCE_ZVE(GBL).stZVE();
        address stSTT = IZivoeGlobals_OCE_ZVE(GBL).stSTT();
        address stJTT = IZivoeGlobals_OCE_ZVE(GBL).stJTT();

        emit EmissionsForwarded(amountZero, amountOne, amountTwo);

        IERC20(ZVE).safeIncreaseAllowance(stZVE, amountZero);
        IERC20(ZVE).safeIncreaseAllowance(stSTT, amountOne);
        IERC20(ZVE).safeIncreaseAllowance(stJTT, amountTwo);
        IZivoeRewards_OCE_ZVE(stZVE).depositReward(ZVE, amountZero);
        IZivoeRewards_OCE_ZVE(stSTT).depositReward(ZVE, amountOne);
        IZivoeRewards_OCE_ZVE(stJTT).depositReward(ZVE, amountTwo);
    }
    
    /// @notice Updates the distribution between rewards contract, in BIPS.
    /// @dev    The sum of distributionRatioBIPS[0], [1], and [2] must equal BIPS.
    /// @param  _distributionRatioBIPS The updated values for the state variable distributionRatioBIPS.
    function updateDistributionRatioBIPS(uint256[3] calldata _distributionRatioBIPS) external {
        require(
            _msgSender() == IZivoeGlobals_OCE_ZVE(GBL).TLC(), 
            "OCE_ZVE::updateDistributionRatioBIPS() _msgSender() != IZivoeGlobals_OCE_ZVE(GBL).TLC()"
        );
        require(
            _distributionRatioBIPS[0] + _distributionRatioBIPS[1] + _distributionRatioBIPS[2] == BIPS,
            "OCE_ZVE::updateDistributionRatioBIPS() sum(_distributionRatioBIPS[0-2]) != BIPS"
        );

        emit UpdatedDistributionRatioBIPS(distributionRatioBIPS, _distributionRatioBIPS);
        distributionRatioBIPS[0] = _distributionRatioBIPS[0];
        distributionRatioBIPS[1] = _distributionRatioBIPS[1];
        distributionRatioBIPS[2] = _distributionRatioBIPS[2];
    }

    /// @notice Updates the exponentialDecayPerSecond variable with provided input.
    /// @dev    For 1.0000% decrease per second, _exponentialDecayPerSecond would be (1 - 0.01) * RAY.
    /// @dev    For 0.0001% decrease per second, _exponentialDecayPerSecond would be (1 - 0.000001) * RAY.
    /// @param _exponentialDecayPerSecond The updated value for exponentialDecayPerSecond state variable.
    function updateExponentialDecayPerSecond(uint256 _exponentialDecayPerSecond) external {
        require(
            _msgSender() == IZivoeGlobals_OCE_ZVE(GBL).TLC(), 
            "OCE_ZVE::updateExponentialDecayPerSecond() _msgSender() != IZivoeGlobals_OCE_ZVE(GBL).TLC()"
        );
        require(
            _exponentialDecayPerSecond >= RAY * 99999998 / 100000000,
            "OCE_ZVE::updateExponentialDecayPerSecond() _exponentialDecayPerSecond < RAY * 99999998 / 100000000"
        );
        require(
            _exponentialDecayPerSecond < RAY,
            "OCE_ZVE::updateExponentialDecayPerSecond() _exponentialDecayPerSecond >= RAY"
        );
        emit UpdatedExponentialDecayPerSecond(exponentialDecayPerSecond, _exponentialDecayPerSecond);
        exponentialDecayPerSecond = _exponentialDecayPerSecond; 
    }



    // ----------
    //    Math
    // ----------

    /// @notice Returns the amount remaining after a decay.
    /// @param top The amount decaying.
    /// @param dur The seconds of decay.
    function decay(uint256 top, uint256 dur) public view returns (uint256) {
        return rmul(top, rpow(exponentialDecayPerSecond, dur, RAY));
    }

    // rmul() and rpow() were ported from MakerDAO:
    // https://github.com/makerdao/dss/blob/master/src/abaci.sol

    /// @notice Multiplies two variables and returns value, truncated by RAY precision.
    /// @param x First value to multiply.
    /// @param y Second value to multiply.
    /// @return z Resulting value of x * y, truncated by RAY precision.
    function rmul(uint256 x, uint256 y) internal pure returns (uint256 z) {
        z = x * y;
        require(y == 0 || z / y == x, "OCE_ZVE::rmul() y != 0 && z / y != x");
        z = z / RAY;
    }
    
    /**
        @notice rpow(uint256 x, uint256 n, uint256 b), used for exponentiation in drip, is a fixed-point arithmetic 
                function that raises x to the power n. It is implemented in Solidity assembly as a repeated squaring 
                algorithm. x and the returned value are to be interpreted as fixed-point integers with scaling factor b. 
                For example, if b == 100, this specifies two decimal digits of precision and the normal decimal value 
                2.1 would be represented as 210; rpow(210, 2, 100) returns 441 (the two-decimal digit fixed-point 
                representation of 2.1^2 = 4.41). In the current implementation, 10^27 is passed for b, making x and 
                the rpow result both of type RAY in standard MCD fixed-point terminology. rpow's formal invariants 
                include "no overflow" as well as constraints on gas usage.
        @param  x The base value.
        @param  n The power to raise "x" by.
        @param  b The scaling factor, a.k.a. resulting precision of "z".
        @return z Resulting value of x^n, scaled by factor b.
    */
    function rpow(uint256 x, uint256 n, uint256 b) internal pure returns (uint256 z) {
        assembly {
            switch n case 0 { z := b }
            default {
                switch x case 0 { z := 0 }
                default {
                    switch mod(n, 2) case 0 { z := b } default { z := x }
                    let half := div(b, 2)  // For rounding.
                    for { n := div(n, 2) } n { n := div(n,2) } {
                        let xx := mul(x, x)
                        if shr(128, x) { revert(0,0) }
                        let xxRound := add(xx, half)
                        if lt(xxRound, xx) { revert(0,0) }
                        x := div(xxRound, b)
                        if mod(n,2) {
                            let zx := mul(z, x)
                            if and(iszero(iszero(x)), iszero(eq(div(zx, x), z))) { revert(0,0) }
                            let zxRound := add(zx, half)
                            if lt(zxRound, zx) { revert(0,0) }
                            z := div(zxRound, b)
                        }
                    }
                }
            }
        }
    }

}

// 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 v4.8.0) (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and making it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        _nonReentrantBefore();
        _;
        _nonReentrantAfter();
    }

    function _nonReentrantBefore() private {
        // On the first call to nonReentrant, _status will be _NOT_ENTERED
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;
    }

    function _nonReentrantAfter() private {
        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC1155/IERC1155.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC1155 compliant contract, as defined in the
 * https://eips.ethereum.org/EIPS/eip-1155[EIP].
 *
 * _Available since v3.1._
 */
interface IERC1155 is IERC165 {
    /**
     * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`.
     */
    event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value);

    /**
     * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all
     * transfers.
     */
    event TransferBatch(
        address indexed operator,
        address indexed from,
        address indexed to,
        uint256[] ids,
        uint256[] values
    );

    /**
     * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to
     * `approved`.
     */
    event ApprovalForAll(address indexed account, address indexed operator, bool approved);

    /**
     * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI.
     *
     * If an {URI} event was emitted for `id`, the standard
     * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value
     * returned by {IERC1155MetadataURI-uri}.
     */
    event URI(string value, uint256 indexed id);

    /**
     * @dev Returns the amount of tokens of token type `id` owned by `account`.
     *
     * Requirements:
     *
     * - `account` cannot be the zero address.
     */
    function balanceOf(address account, uint256 id) external view returns (uint256);

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}.
     *
     * Requirements:
     *
     * - `accounts` and `ids` must have the same length.
     */
    function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids)
        external
        view
        returns (uint256[] memory);

    /**
     * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`,
     *
     * Emits an {ApprovalForAll} event.
     *
     * Requirements:
     *
     * - `operator` cannot be the caller.
     */
    function setApprovalForAll(address operator, bool approved) external;

    /**
     * @dev Returns true if `operator` is approved to transfer ``account``'s tokens.
     *
     * See {setApprovalForAll}.
     */
    function isApprovedForAll(address account, address operator) external view returns (bool);

    /**
     * @dev Transfers `amount` tokens of token type `id` from `from` to `to`.
     *
     * Emits a {TransferSingle} event.
     *
     * Requirements:
     *
     * - `to` cannot be the zero address.
     * - If the caller is not `from`, it must have been approved to spend ``from``'s tokens via {setApprovalForAll}.
     * - `from` must have a balance of tokens of type `id` of at least `amount`.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the
     * acceptance magic value.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 id,
        uint256 amount,
        bytes calldata data
    ) external;

    /**
     * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}.
     *
     * Emits a {TransferBatch} event.
     *
     * Requirements:
     *
     * - `ids` and `amounts` must have the same length.
     * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the
     * acceptance magic value.
     */
    function safeBatchTransferFrom(
        address from,
        address to,
        uint256[] calldata ids,
        uint256[] calldata amounts,
        bytes calldata data
    ) external;
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/IERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev _Available since v3.1._
 */
interface IERC1155Receiver is IERC165 {
    /**
     * @dev Handles the receipt of a single ERC1155 token type. This function is
     * called at the end of a `safeTransferFrom` after the balance has been updated.
     *
     * NOTE: To accept the transfer, this must return
     * `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))`
     * (i.e. 0xf23a6e61, or its own function selector).
     *
     * @param operator The address which initiated the transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param id The ID of the token being transferred
     * @param value The amount of tokens being transferred
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed
     */
    function onERC1155Received(
        address operator,
        address from,
        uint256 id,
        uint256 value,
        bytes calldata data
    ) external returns (bytes4);

    /**
     * @dev Handles the receipt of a multiple ERC1155 token types. This function
     * is called at the end of a `safeBatchTransferFrom` after the balances have
     * been updated.
     *
     * NOTE: To accept the transfer(s), this must return
     * `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))`
     * (i.e. 0xbc197c81, or its own function selector).
     *
     * @param operator The address which initiated the batch transfer (i.e. msg.sender)
     * @param from The address which previously owned the token
     * @param ids An array containing ids of each token being transferred (order and length must match values array)
     * @param values An array containing amounts of each token being transferred (order and length must match ids array)
     * @param data Additional data with no specified format
     * @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed
     */
    function onERC1155BatchReceived(
        address operator,
        address from,
        uint256[] calldata ids,
        uint256[] calldata values,
        bytes calldata data
    ) external returns (bytes4);
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC1155/utils/ERC1155Holder.sol)

pragma solidity ^0.8.0;

import "./ERC1155Receiver.sol";

/**
 * Simple implementation of `ERC1155Receiver` that will allow a contract to hold ERC1155 tokens.
 *
 * IMPORTANT: When inheriting this contract, you must include a way to use the received tokens, otherwise they will be
 * stuck.
 *
 * @dev _Available since v3.1._
 */
contract ERC1155Holder is ERC1155Receiver {
    function onERC1155Received(
        address,
        address,
        uint256,
        uint256,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC1155Received.selector;
    }

    function onERC1155BatchReceived(
        address,
        address,
        uint256[] memory,
        uint256[] memory,
        bytes memory
    ) public virtual override returns (bytes4) {
        return this.onERC1155BatchReceived.selector;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC1155/utils/ERC1155Receiver.sol)

pragma solidity ^0.8.0;

import "../IERC1155Receiver.sol";
import "../../../utils/introspection/ERC165.sol";

/**
 * @dev _Available since v3.1._
 */
abstract contract ERC1155Receiver is ERC165, IERC1155Receiver {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override(ERC165, IERC165) returns (bool) {
        return interfaceId == type(IERC1155Receiver).interfaceId || super.supportsInterface(interfaceId);
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
 * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
 *
 * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
 * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
 * need to send a transaction, and thus is not required to hold Ether at all.
 */
interface IERC20Permit {
    /**
     * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
     * given ``owner``'s signed approval.
     *
     * IMPORTANT: The same issues {IERC20-approve} has related to transaction
     * ordering also apply here.
     *
     * Emits an {Approval} event.
     *
     * Requirements:
     *
     * - `spender` cannot be the zero address.
     * - `deadline` must be a timestamp in the future.
     * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
     * over the EIP712-formatted function arguments.
     * - the signature must use ``owner``'s current nonce (see {nonces}).
     *
     * For more information on the signature format, see the
     * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
     * section].
     */
    function permit(
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) external;

    /**
     * @dev Returns the current nonce for `owner`. This value must be
     * included whenever a signature is generated for {permit}.
     *
     * Every successful call to {permit} increases ``owner``'s nonce by one. This
     * prevents a signature from being used multiple times.
     */
    function nonces(address owner) external view returns (uint256);

    /**
     * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
     */
    // solhint-disable-next-line func-name-mixedcase
    function DOMAIN_SEPARATOR() external view returns (bytes32);
}

// 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 v4.8.0) (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";

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

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

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

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

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

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

    function safePermit(
        IERC20Permit token,
        address owner,
        address spender,
        uint256 value,
        uint256 deadline,
        uint8 v,
        bytes32 r,
        bytes32 s
    ) internal {
        uint256 nonceBefore = token.nonces(owner);
        token.permit(owner, spender, value, deadline, v, r, s);
        uint256 nonceAfter = token.nonces(owner);
        require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
    }

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

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

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)

pragma solidity ^0.8.0;

import "../../utils/introspection/IERC165.sol";

/**
 * @dev Required interface of an ERC721 compliant contract.
 */
interface IERC721 is IERC165 {
    /**
     * @dev Emitted when `tokenId` token is transferred from `from` to `to`.
     */
    event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
     */
    event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);

    /**
     * @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
     */
    event ApprovalForAll(address indexed owner, address indexed operator, bool approved);

    /**
     * @dev Returns the number of tokens in ``owner``'s account.
     */
    function balanceOf(address owner) external view returns (uint256 balance);

    /**
     * @dev Returns the owner of the `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function ownerOf(uint256 tokenId) external view returns (address owner);

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId,
        bytes calldata data
    ) external;

    /**
     * @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
     * are aware of the ERC721 protocol to prevent tokens from being forever locked.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must exist and be owned by `from`.
     * - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
     * - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
     *
     * Emits a {Transfer} event.
     */
    function safeTransferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Transfers `tokenId` token from `from` to `to`.
     *
     * WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
     * or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
     * understand this adds an external call which potentially creates a reentrancy vulnerability.
     *
     * Requirements:
     *
     * - `from` cannot be the zero address.
     * - `to` cannot be the zero address.
     * - `tokenId` token must be owned by `from`.
     * - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address from,
        address to,
        uint256 tokenId
    ) external;

    /**
     * @dev Gives permission to `to` to transfer `tokenId` token to another account.
     * The approval is cleared when the token is transferred.
     *
     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.
     *
     * Requirements:
     *
     * - The caller must own the token or be an approved operator.
     * - `tokenId` must exist.
     *
     * Emits an {Approval} event.
     */
    function approve(address to, uint256 tokenId) external;

    /**
     * @dev Approve or remove `operator` as an operator for the caller.
     * Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
     *
     * Requirements:
     *
     * - The `operator` cannot be the caller.
     *
     * Emits an {ApprovalForAll} event.
     */
    function setApprovalForAll(address operator, bool _approved) external;

    /**
     * @dev Returns the account approved for `tokenId` token.
     *
     * Requirements:
     *
     * - `tokenId` must exist.
     */
    function getApproved(uint256 tokenId) external view returns (address operator);

    /**
     * @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
     *
     * See {setApprovalForAll}
     */
    function isApprovedForAll(address owner, address operator) external view 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 v4.8.0) (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://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Address: insufficient balance");

        (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 v4.4.1 (utils/introspection/ERC165.sol)

pragma solidity ^0.8.0;

import "./IERC165.sol";

/**
 * @dev Implementation of the {IERC165} interface.
 *
 * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
 * for the additional interface id that will be supported. For example:
 *
 * ```solidity
 * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
 *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
 * }
 * ```
 *
 * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.
 */
abstract contract ERC165 is IERC165 {
    /**
     * @dev See {IERC165-supportsInterface}.
     */
    function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
        return interfaceId == type(IERC165).interfaceId;
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)

pragma solidity ^0.8.0;

/**
 * @dev Interface of the ERC165 standard, as defined in the
 * https://eips.ethereum.org/EIPS/eip-165[EIP].
 *
 * Implementers can declare support of contract interfaces, which can then be
 * queried by others ({ERC165Checker}).
 *
 * For an implementation, see {ERC165}.
 */
interface IERC165 {
    /**
     * @dev Returns true if this contract implements the interface defined by
     * `interfaceId`. See the corresponding
     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
     * to learn more about how these ids are created.
     *
     * This function call must use less than 30 000 gas.
     */
    function supportsInterface(bytes4 interfaceId) external view returns (bool);
}

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17;

import "../../lib/openzeppelin-contracts/contracts/access/Ownable.sol";

abstract contract OwnableLocked is Ownable {
    
    bool public locked; /// @dev A variable "locked" that prevents future ownership transfer.

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier unlocked() {
        require(!locked, "OwnableLocked::unlocked() locked");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner and if !locked.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public override(Ownable) onlyOwner unlocked { _transferOwnership(address(0)); }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner and if !locked.
     */
    function transferOwnership(address newOwner) public override(Ownable) onlyOwner unlocked {
        require(newOwner != address(0), "OwnableLocked::transferOwnership() newOwner == address(0)");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner and if !locked.
     */
    function transferOwnershipAndLock(address newOwner) public onlyOwner unlocked {
        require(newOwner != address(0), "OwnableLocked::transferOwnershipAndLock() newOwner == address(0)");
        locked = true;
        _transferOwnership(newOwner);
    }

}

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.8.17;

import "./libraries/OwnableLocked.sol";

import "../lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
import "../lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
import "../lib/openzeppelin-contracts/contracts/token/ERC721/IERC721.sol";
import "../lib/openzeppelin-contracts/contracts/token/ERC721/utils/ERC721Holder.sol";
import "../lib/openzeppelin-contracts/contracts/token/ERC1155/IERC1155.sol";
import "../lib/openzeppelin-contracts/contracts/token/ERC1155/utils/ERC1155Holder.sol";



/// @notice  This contract standardizes communication between the DAO and lockers.
abstract contract ZivoeLocker is OwnableLocked, ERC1155Holder, ERC721Holder {
    
    using SafeERC20 for IERC20;

    // -----------------
    //    Constructor
    // -----------------

    /// @notice Initializes the ZivoeLocker contract.
    constructor() {}



    // ---------------
    //    Functions
    // ---------------

    /// @notice Permission for calling pushToLocker().
    function canPush() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pullFromLocker().
    function canPull() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pullFromLockerPartial().
    function canPullPartial() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pushToLockerMulti().
    function canPushMulti() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pullFromLockerMulti().
    function canPullMulti() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pullFromLockerMultiPartial().
    function canPullMultiPartial() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pushToLockerERC721().
    function canPushERC721() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pullFromLockerERC721().
    function canPullERC721() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pushToLockerMultiERC721().
    function canPushMultiERC721() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pullFromLockerMultiERC721().
    function canPullMultiERC721() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pushToLockerERC1155().
    function canPushERC1155() public virtual view returns (bool) { return false; }

    /// @notice Permission for calling pullFromLockerERC1155().
    function canPullERC1155() public virtual view returns (bool) { return false; }

    /// @notice Migrates specific amount of ERC20 from owner() to locker.
    /// @param  asset The asset to migrate.
    /// @param  amount The amount of "asset" to migrate.
    /// @param  data Accompanying transaction data.
    function pushToLocker(address asset, uint256 amount, bytes calldata data) external virtual onlyOwner {
        require(canPush(), "ZivoeLocker::pushToLocker() !canPush()");
        IERC20(asset).safeTransferFrom(owner(), address(this), amount);
    }

    /// @notice Migrates entire ERC20 balance from locker to owner().
    /// @param  asset The asset to migrate.
    /// @param  data Accompanying transaction data.
    function pullFromLocker(address asset, bytes calldata data) external virtual onlyOwner {
        require(canPull(), "ZivoeLocker::pullFromLocker() !canPull()");
        IERC20(asset).safeTransfer(owner(), IERC20(asset).balanceOf(address(this)));
    }

    /// @notice Migrates specific amount of ERC20 from locker to owner().
    /// @param  asset The asset to migrate.
    /// @param  amount The amount of "asset" to migrate.
    /// @param  data Accompanying transaction data.
    function pullFromLockerPartial(address asset, uint256 amount, bytes calldata data) external virtual onlyOwner {
        require(canPullPartial(), "ZivoeLocker::pullFromLockerPartial() !canPullPartial()");
        IERC20(asset).safeTransfer(owner(), amount);
    }

    /// @notice Migrates specific amounts of ERC20s from owner() to locker.
    /// @param  assets The assets to migrate.
    /// @param  amounts The amounts of "assets" to migrate, corresponds to "assets" by position in array.
    /// @param  data Accompanying transaction data.
    function pushToLockerMulti(
        address[] calldata assets, uint256[] calldata amounts, bytes[] calldata data
    ) external virtual onlyOwner {
        require(canPushMulti(), "ZivoeLocker::pushToLockerMulti() !canPushMulti()");
        for (uint256 i = 0; i < assets.length; i++) {
            IERC20(assets[i]).safeTransferFrom(owner(), address(this), amounts[i]);
        }
    }

    /// @notice Migrates full amount of ERC20s from locker to owner().
    /// @param  assets The assets to migrate.
    /// @param  data Accompanying transaction data.
    function pullFromLockerMulti(address[] calldata assets, bytes[] calldata data) external virtual onlyOwner {
        require(canPullMulti(), "ZivoeLocker::pullFromLockerMulti() !canPullMulti()");
        for (uint256 i = 0; i < assets.length; i++) {
            IERC20(assets[i]).safeTransfer(owner(), IERC20(assets[i]).balanceOf(address(this)));
        }
    }

    /// @notice Migrates specific amounts of ERC20s from locker to owner().
    /// @param  assets The assets to migrate.
    /// @param  amounts The amounts of "assets" to migrate, corresponds to "assets" by position in array.
    /// @param  data Accompanying transaction data.
    function pullFromLockerMultiPartial(
        address[] calldata assets, uint256[] calldata amounts, bytes[] calldata data
    ) external virtual onlyOwner {
        require(canPullMultiPartial(), "ZivoeLocker::pullFromLockerMultiPartial() !canPullMultiPartial()");
        for (uint256 i = 0; i < assets.length; i++) {
            IERC20(assets[i]).safeTransfer(owner(), amounts[i]);
        }
    }

    /// @notice Migrates an ERC721 from owner() to locker.
    /// @param  asset The NFT contract.
    /// @param  tokenId The ID of the NFT to migrate.
    /// @param  data Accompanying transaction data.
    function pushToLockerERC721(address asset, uint256 tokenId, bytes calldata data) external virtual onlyOwner {
        require(canPushERC721(), "ZivoeLocker::pushToLockerERC721() !canPushERC721()");
        IERC721(asset).safeTransferFrom(owner(), address(this), tokenId, data);
    }

    /// @notice Migrates an ERC721 from locker to owner().
    /// @param  asset The NFT contract.
    /// @param  tokenId The ID of the NFT to migrate.
    /// @param  data Accompanying transaction data.
    function pullFromLockerERC721(address asset, uint256 tokenId, bytes calldata data) external virtual onlyOwner {
        require(canPullERC721(), "ZivoeLocker::pullFromLockerERC721() !canPullERC721()");
        IERC721(asset).safeTransferFrom(address(this), owner(), tokenId, data);
    }

    /// @notice Migrates ERC721s from owner() to locker.
    /// @param  assets The NFT contracts.
    /// @param  tokenIds The IDs of the NFTs to migrate.
    /// @param  data Accompanying transaction data.
    function pushToLockerMultiERC721(
        address[] calldata assets, uint256[] calldata tokenIds, bytes[] calldata data
    ) external virtual onlyOwner {
        require(canPushMultiERC721(), "ZivoeLocker::pushToLockerMultiERC721() !canPushMultiERC721()");
        for (uint256 i = 0; i < assets.length; i++) {
           IERC721(assets[i]).safeTransferFrom(owner(), address(this), tokenIds[i], data[i]);
        }
    }

    /// @notice Migrates ERC721s from locker to owner().
    /// @param  assets The NFT contracts.
    /// @param  tokenIds The IDs of the NFTs to migrate.
    /// @param  data Accompanying transaction data.
    function pullFromLockerMultiERC721(
        address[] calldata assets, uint256[] calldata tokenIds, bytes[] calldata data
    ) external virtual onlyOwner {
        require(canPullMultiERC721(), "ZivoeLocker::pullFromLockerMultiERC721() !canPullMultiERC721()");
        for (uint256 i = 0; i < assets.length; i++) {
           IERC721(assets[i]).safeTransferFrom(address(this), owner(), tokenIds[i], data[i]);
        }
    }

    /// @notice Migrates ERC1155 assets from owner() to locker.
    /// @param  asset The ERC1155 contract.
    /// @param  ids The IDs of the assets within the ERC1155 to migrate.
    /// @param  amounts The amounts to migrate.
    /// @param  data Accompanying transaction data.
    function pushToLockerERC1155(
        address asset, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data
    ) external virtual onlyOwner {
        require(canPushERC1155(), "ZivoeLocker::pushToLockerERC1155() !canPushERC1155()");
        IERC1155(asset).safeBatchTransferFrom(owner(), address(this), ids, amounts, data);
    }

    /// @notice Migrates ERC1155 assets from locker to owner().
    /// @param  asset The ERC1155 contract.
    /// @param  ids The IDs of the assets within the ERC1155 to migrate.
    /// @param  amounts The amounts to migrate.
    /// @param  data Accompanying transaction data.
    function pullFromLockerERC1155(
        address asset, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data
    ) external virtual onlyOwner {
        require(canPullERC1155(), "ZivoeLocker::pullFromLockerERC1155() !canPullERC1155()");
        IERC1155(asset).safeBatchTransferFrom(address(this), owner(), ids, amounts, data);
    }

}

{
  "optimizer": {
    "enabled": true,
    "runs": 10
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

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000000000000000000000000b65a66621d7de34afec9b9ac0755133051550dd7000000000000000000000000ea537eb0bbcc7783bdf7c595bf9371984583da66

-----Decoded View---------------
Arg [0] : DAO (address): 0xB65a66621D7dE34afec9b9AC0755133051550dD7
Arg [1] : _GBL (address): 0xEa537eB0bBcC7783bDF7c595bF9371984583dA66

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 000000000000000000000000b65a66621d7de34afec9b9ac0755133051550dd7
Arg [1] : 000000000000000000000000ea537eb0bbcc7783bdf7c595bf9371984583da66