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// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.7;

import "../interfaces/IWETH.sol";
import "../interfaces/IWethGate.sol";

contract WethGate is IWethGate
{
    IWETH public weth; // wrapped native token contract

    /* ========== ERRORS ========== */

    error EthTransferFailed();

    /* ========== EVENTS ========== */

    event Withdrawal(address indexed receiver, uint wad);

    /* ========== CONSTRUCTOR  ========== */

    constructor(IWETH _weth) {
        weth = _weth;
    }

    function withdraw(address _receiver, uint _wad) external override {
        weth.withdraw(_wad);
        _safeTransferETH(_receiver, _wad);
        emit Withdrawal(_receiver, _wad);
    }

    function _safeTransferETH(address _to, uint256 _value) internal {
        (bool success, ) = _to.call{value: _value}(new bytes(0));
        if (!success) revert EthTransferFailed();
    }

    // we need to accept ETH sends to unwrap WETH
    receive() external payable {
    }

    // ============ Version Control ============
    function version() external pure returns (uint256) {
        return 101; // 1.0.1
    }
}

// SPDX-License-Identifier: MIT
pragma solidity 0.8.7;

interface IWETH {
    function deposit() external payable;

    function withdraw(uint256 wad) external;

    function totalSupply() external view returns (uint256);

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

    function transfer(address recipient, 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity 0.8.7;

interface IWethGate {
    function withdraw(address receiver, uint wad) external;
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "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"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"receiver","type":"address"},{"indexed":false,"internalType":"uint256","name":"wad","type":"uint256"}],"name":"Withdrawal","type":"event"},{"inputs":[],"name":"version","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"weth","outputs":[{"internalType":"contract IWETH","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_receiver","type":"address"},{"internalType":"uint256","name":"_wad","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2

-----Decoded View---------------
Arg [0] : _weth (address): 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 000000000000000000000000c02aaa39b223fe8d0a0e5c4f27ead9083c756cc2