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合同元数据
编译器
0.8.24+commit.e11b9ed9
语言
Solidity
合同源代码
文件 1 的 9:GenericErrors.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

/**
 * @notice It is emitted if the call recipient is not a contract.
 */
error NotAContract();
合同源代码
文件 2 的 9:IERC20.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

interface IERC20 {
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    function totalSupply() external view returns (uint256);

    function balanceOf(address account) external view returns (uint256);

    function transfer(address to, uint256 amount) external returns (bool);

    function allowance(address owner, address spender) external view returns (uint256);

    function approve(address spender, uint256 amount) external returns (bool);

    function transferFrom(address from, address to, uint256 amount) external returns (bool);

    function decimals() external view returns (uint8);
}
合同源代码
文件 3 的 9:IOwnableTwoSteps.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

/**
 * @title IOwnableTwoSteps
 * @author LooksRare protocol team (👀,💎)
 */
interface IOwnableTwoSteps {
    /**
     * @notice This enum keeps track of the ownership status.
     * @param NoOngoingTransfer The default status when the owner is set
     * @param TransferInProgress The status when a transfer to a new owner is initialized
     * @param RenouncementInProgress The status when a transfer to address(0) is initialized
     */
    enum Status {
        NoOngoingTransfer,
        TransferInProgress,
        RenouncementInProgress
    }

    /**
     * @notice This is returned when there is no transfer of ownership in progress.
     */
    error NoOngoingTransferInProgress();

    /**
     * @notice This is returned when the caller is not the owner.
     */
    error NotOwner();

    /**
     * @notice This is returned when there is no renouncement in progress but
     *         the owner tries to validate the ownership renouncement.
     */
    error RenouncementNotInProgress();

    /**
     * @notice This is returned when the transfer is already in progress but the owner tries
     *         initiate a new ownership transfer.
     */
    error TransferAlreadyInProgress();

    /**
     * @notice This is returned when there is no ownership transfer in progress but the
     *         ownership change tries to be approved.
     */
    error TransferNotInProgress();

    /**
     * @notice This is returned when the ownership transfer is attempted to be validated by the
     *         a caller that is not the potential owner.
     */
    error WrongPotentialOwner();

    /**
     * @notice This is emitted if the ownership transfer is cancelled.
     */
    event CancelOwnershipTransfer();

    /**
     * @notice This is emitted if the ownership renouncement is initiated.
     */
    event InitiateOwnershipRenouncement();

    /**
     * @notice This is emitted if the ownership transfer is initiated.
     * @param previousOwner Previous/current owner
     * @param potentialOwner Potential/future owner
     */
    event InitiateOwnershipTransfer(address previousOwner, address potentialOwner);

    /**
     * @notice This is emitted when there is a new owner.
     */
    event NewOwner(address newOwner);
}
合同源代码
文件 4 的 9:IWETH.sol
// SPDX-License-Identifier: MIT
pragma solidity >=0.5.0;

interface IWETH {
    function deposit() external payable;

    function transfer(address dst, uint256 wad) external returns (bool);

    function withdraw(uint256 wad) external;
}
合同源代码
文件 5 的 9:LowLevelERC20Transfer.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

// Interfaces
import {IERC20} from "../interfaces/generic/IERC20.sol";

// Errors
import {ERC20TransferFail, ERC20TransferFromFail} from "../errors/LowLevelErrors.sol";
import {NotAContract} from "../errors/GenericErrors.sol";

/**
 * @title LowLevelERC20Transfer
 * @notice This contract contains low-level calls to transfer ERC20 tokens.
 * @author LooksRare protocol team (👀,💎)
 */
contract LowLevelERC20Transfer {
    /**
     * @notice Execute ERC20 transferFrom
     * @param currency Currency address
     * @param from Sender address
     * @param to Recipient address
     * @param amount Amount to transfer
     */
    function _executeERC20TransferFrom(address currency, address from, address to, uint256 amount) internal {
        if (currency.code.length == 0) {
            revert NotAContract();
        }

        (bool status, bytes memory data) = currency.call(abi.encodeCall(IERC20.transferFrom, (from, to, amount)));

        if (!status) {
            revert ERC20TransferFromFail();
        }

        if (data.length > 0) {
            if (!abi.decode(data, (bool))) {
                revert ERC20TransferFromFail();
            }
        }
    }

    /**
     * @notice Execute ERC20 (direct) transfer
     * @param currency Currency address
     * @param to Recipient address
     * @param amount Amount to transfer
     */
    function _executeERC20DirectTransfer(address currency, address to, uint256 amount) internal {
        if (currency.code.length == 0) {
            revert NotAContract();
        }

        (bool status, bytes memory data) = currency.call(abi.encodeCall(IERC20.transfer, (to, amount)));

        if (!status) {
            revert ERC20TransferFail();
        }

        if (data.length > 0) {
            if (!abi.decode(data, (bool))) {
                revert ERC20TransferFail();
            }
        }
    }
}
合同源代码
文件 6 的 9:LowLevelErrors.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

/**
 * @notice It is emitted if the ETH transfer fails.
 */
error ETHTransferFail();

/**
 * @notice It is emitted if the ERC20 approval fails.
 */
error ERC20ApprovalFail();

/**
 * @notice It is emitted if the ERC20 transfer fails.
 */
error ERC20TransferFail();

/**
 * @notice It is emitted if the ERC20 transferFrom fails.
 */
error ERC20TransferFromFail();

/**
 * @notice It is emitted if the ERC721 transferFrom fails.
 */
error ERC721TransferFromFail();

/**
 * @notice It is emitted if the ERC1155 safeTransferFrom fails.
 */
error ERC1155SafeTransferFromFail();

/**
 * @notice It is emitted if the ERC1155 safeBatchTransferFrom fails.
 */
error ERC1155SafeBatchTransferFromFail();
合同源代码
文件 7 的 9:LowLevelWETH.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

// Interfaces
import {IWETH} from "../interfaces/generic/IWETH.sol";

/**
 * @title LowLevelWETH
 * @notice This contract contains a function to transfer ETH with an option to wrap to WETH.
 *         If the ETH transfer fails within a gas limit, the amount in ETH is wrapped to WETH and then transferred.
 * @author LooksRare protocol team (👀,💎)
 */
contract LowLevelWETH {
    /**
     * @notice It transfers ETH to a recipient with a specified gas limit.
     *         If the original transfers fails, it wraps to WETH and transfers the WETH to recipient.
     * @param _WETH WETH address
     * @param _to Recipient address
     * @param _amount Amount to transfer
     * @param _gasLimit Gas limit to perform the ETH transfer
     */
    function _transferETHAndWrapIfFailWithGasLimit(
        address _WETH,
        address _to,
        uint256 _amount,
        uint256 _gasLimit
    ) internal {
        bool status;

        assembly {
            status := call(_gasLimit, _to, _amount, 0, 0, 0, 0)
        }

        if (!status) {
            IWETH(_WETH).deposit{value: _amount}();
            IWETH(_WETH).transfer(_to, _amount);
        }
    }
}
合同源代码
文件 8 的 9:OwnableTwoSteps.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.17;

// Interfaces
import {IOwnableTwoSteps} from "./interfaces/IOwnableTwoSteps.sol";

/**
 * @title OwnableTwoSteps
 * @notice This contract offers transfer of ownership in two steps with potential owner
 *         having to confirm the transaction to become the owner.
 *         Renouncement of the ownership is also a two-step process since the next potential owner is the address(0).
 * @author LooksRare protocol team (👀,💎)
 */
abstract contract OwnableTwoSteps is IOwnableTwoSteps {
    /**
     * @notice Address of the current owner.
     */
    address public owner;

    /**
     * @notice Address of the potential owner.
     */
    address public potentialOwner;

    /**
     * @notice Ownership status.
     */
    Status public ownershipStatus;

    /**
     * @notice Modifier to wrap functions for contracts that inherit this contract.
     */
    modifier onlyOwner() {
        _onlyOwner();
        _;
    }

    /**
     * @notice Constructor
     * @param _owner The contract's owner
     */
    constructor(address _owner) {
        owner = _owner;
        emit NewOwner(_owner);
    }

    /**
     * @notice This function is used to cancel the ownership transfer.
     * @dev This function can be used for both cancelling a transfer to a new owner and
     *      cancelling the renouncement of the ownership.
     */
    function cancelOwnershipTransfer() external onlyOwner {
        Status _ownershipStatus = ownershipStatus;
        if (_ownershipStatus == Status.NoOngoingTransfer) {
            revert NoOngoingTransferInProgress();
        }

        if (_ownershipStatus == Status.TransferInProgress) {
            delete potentialOwner;
        }

        delete ownershipStatus;

        emit CancelOwnershipTransfer();
    }

    /**
     * @notice This function is used to confirm the ownership renouncement.
     */
    function confirmOwnershipRenouncement() external onlyOwner {
        if (ownershipStatus != Status.RenouncementInProgress) {
            revert RenouncementNotInProgress();
        }

        delete owner;
        delete ownershipStatus;

        emit NewOwner(address(0));
    }

    /**
     * @notice This function is used to confirm the ownership transfer.
     * @dev This function can only be called by the current potential owner.
     */
    function confirmOwnershipTransfer() external {
        if (ownershipStatus != Status.TransferInProgress) {
            revert TransferNotInProgress();
        }

        if (msg.sender != potentialOwner) {
            revert WrongPotentialOwner();
        }

        owner = msg.sender;
        delete ownershipStatus;
        delete potentialOwner;

        emit NewOwner(msg.sender);
    }

    /**
     * @notice This function is used to initiate the transfer of ownership to a new owner.
     * @param newPotentialOwner New potential owner address
     */
    function initiateOwnershipTransfer(address newPotentialOwner) external onlyOwner {
        if (ownershipStatus != Status.NoOngoingTransfer) {
            revert TransferAlreadyInProgress();
        }

        ownershipStatus = Status.TransferInProgress;
        potentialOwner = newPotentialOwner;

        /**
         * @dev This function can only be called by the owner, so msg.sender is the owner.
         *      We don't have to SLOAD the owner again.
         */
        emit InitiateOwnershipTransfer(msg.sender, newPotentialOwner);
    }

    /**
     * @notice This function is used to initiate the ownership renouncement.
     */
    function initiateOwnershipRenouncement() external onlyOwner {
        if (ownershipStatus != Status.NoOngoingTransfer) {
            revert TransferAlreadyInProgress();
        }

        ownershipStatus = Status.RenouncementInProgress;

        emit InitiateOwnershipRenouncement();
    }

    function _onlyOwner() private view {
        if (msg.sender != owner) revert NotOwner();
    }
}
合同源代码
文件 9 的 9:TokenRescuer.sol
// SPDX-License-Identifier: MIT
pragma solidity 0.8.24;

import {LowLevelERC20Transfer} from "@looksrare/contracts-libs/contracts/lowLevelCallers/LowLevelERC20Transfer.sol";
import {LowLevelWETH} from "@looksrare/contracts-libs/contracts/lowLevelCallers/LowLevelWETH.sol";
import {OwnableTwoSteps} from "@looksrare/contracts-libs/contracts/OwnableTwoSteps.sol";
import {IERC20} from "@openzeppelin/contracts/token/ERC20/IERC20.sol";

/**
 * @title TokenRescuer
 * @notice It rescues tokens trapped on the wrong network
 * @author YOLO Games Protocol Team
 */
contract TokenRescuer is LowLevelERC20Transfer, LowLevelWETH, OwnableTwoSteps {
    constructor() OwnableTwoSteps(0x2C64e6Ee1Dd9Fc2a0Db6a6B1aa2c3f163C7A2C78) {}

    function withdrawToken(address currency) external onlyOwner {
        _executeERC20DirectTransfer({
            currency: currency,
            to: msg.sender,
            amount: IERC20(currency).balanceOf(address(this))
        });
    }

    function withdrawETH() external onlyOwner {
        _transferETHAndWrapIfFailWithGasLimit(
            0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2,
            msg.sender,
            address(this).balance,
            gasleft()
        );
    }
}
设置
{
  "compilationTarget": {
    "contracts/TokenRescuer.sol": "TokenRescuer"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 888888
  },
  "remappings": [],
  "viaIR": true
}
ABI
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ERC20TransferFail","type":"error"},{"inputs":[],"name":"NoOngoingTransferInProgress","type":"error"},{"inputs":[],"name":"NotAContract","type":"error"},{"inputs":[],"name":"NotOwner","type":"error"},{"inputs":[],"name":"RenouncementNotInProgress","type":"error"},{"inputs":[],"name":"TransferAlreadyInProgress","type":"error"},{"inputs":[],"name":"TransferNotInProgress","type":"error"},{"inputs":[],"name":"WrongPotentialOwner","type":"error"},{"anonymous":false,"inputs":[],"name":"CancelOwnershipTransfer","type":"event"},{"anonymous":false,"inputs":[],"name":"InitiateOwnershipRenouncement","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":false,"internalType":"address","name":"potentialOwner","type":"address"}],"name":"InitiateOwnershipTransfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"newOwner","type":"address"}],"name":"NewOwner","type":"event"},{"inputs":[],"name":"cancelOwnershipTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"confirmOwnershipRenouncement","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"confirmOwnershipTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"initiateOwnershipRenouncement","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newPotentialOwner","type":"address"}],"name":"initiateOwnershipTransfer","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ownershipStatus","outputs":[{"internalType":"enum IOwnableTwoSteps.Status","name":"","type":"uint8"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"potentialOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawETH","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"currency","type":"address"}],"name":"withdrawToken","outputs":[],"stateMutability":"nonpayable","type":"function"}]