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// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;
pragma abicoder v1;

import "@1inch/solidity-utils/contracts/OnlyWethReceiver.sol";
import "@1inch/solidity-utils/contracts/interfaces/IWETH.sol";

import "../interfaces/IPostInteractionNotificationReceiver.sol";
import "../libraries/Errors.sol";

contract WethUnwrapper is OnlyWethReceiver, IPostInteractionNotificationReceiver {
    IWETH private immutable _WETH;  // solhint-disable-line var-name-mixedcase

    uint256 private constant _RAW_CALL_GAS_LIMIT = 5000;

    constructor(IWETH weth) OnlyWethReceiver(address(weth)) {
        _WETH = weth;
    }

    function fillOrderPostInteraction(
        bytes32 /* orderHash */,
        address maker,
        address /* taker */,
        uint256 /* makingAmount */,
        uint256 takingAmount,
        uint256 /* remainingMakerAmount */,
        bytes calldata /* interactiveData */
    ) external override {
        _WETH.withdraw(takingAmount);
        // solhint-disable-next-line avoid-low-level-calls
        (bool success, ) = maker.call{value: takingAmount, gas: _RAW_CALL_GAS_LIMIT}("");
        if (!success) revert Errors.ETHTransferFailed();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;

library Errors {
    error InvalidMsgValue();
    error ETHTransferFailed();
}

// SPDX-License-Identifier: MIT

pragma solidity 0.8.17;
pragma abicoder v1;

/**
 * @title Interface for interactor which acts after `taker -> maker` transfers.
 * @notice The order filling steps are `preInteraction` =>` Transfer "maker -> taker"` => `Interaction` => `Transfer "taker -> maker"` => **`postInteraction`**
 */
interface IPostInteractionNotificationReceiver {
    /**
     * @notice Callback method that gets called after all funds transfers
     * @param orderHash Hash of the order being processed
     * @param maker Maker address
     * @param taker Taker address
     * @param makingAmount Actual making amount
     * @param takingAmount Actual taking amount
     * @param remainingAmount Limit order remaining maker amount after the swap
     * @param interactionData Interaction calldata
     */
    function fillOrderPostInteraction(
        bytes32 orderHash,
        address maker,
        address taker,
        uint256 makingAmount,
        uint256 takingAmount,
        uint256 remainingAmount,
        bytes memory interactionData
    ) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
pragma abicoder v1;

import "./EthReceiver.sol";

abstract contract OnlyWethReceiver is EthReceiver {
    address private immutable _WETH;  // solhint-disable-line var-name-mixedcase

    constructor(address weth) {
        _WETH = address(weth);
    }

    function _receive() internal virtual override {
        if (msg.sender != _WETH) revert EthDepositRejected();
    }
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
pragma abicoder v1;

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


interface IWETH is IERC20 {
    function deposit() external payable;
    function withdraw(uint256 amount) external;
}

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;
pragma abicoder v1;

abstract contract EthReceiver {
    error EthDepositRejected();

    receive() external payable {
        _receive();
    }

    function _receive() internal virtual {
        // solhint-disable-next-line avoid-tx-origin
        if (msg.sender == tx.origin) revert EthDepositRejected();
    }
}

// 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);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 1000000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"contract IWETH","name":"weth","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ETHTransferFailed","type":"error"},{"inputs":[],"name":"EthDepositRejected","type":"error"},{"inputs":[{"internalType":"bytes32","name":"","type":"bytes32"},{"internalType":"address","name":"maker","type":"address"},{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"takingAmount","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"bytes","name":"","type":"bytes"}],"name":"fillOrderPostInteraction","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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

0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270

-----Decoded View---------------
Arg [0] : weth (address): 0x0d500B1d8E8eF31E21C99d1Db9A6444d3ADf1270

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 0000000000000000000000000d500b1d8e8ef31e21c99d1db9a6444d3adf1270