all files / contracts/test/ WETH.sol

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// SPDX-License-Identifier: MIT
 
/**
 *Submitted for verification at Etherscan.io on 2017-12-12
 */
 
// Copyright (C) 2015, 2016, 2017 Dapphub
 
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
 
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
pragma solidity ^0.8.2;
 
contract WETH9 {
    string public name = "Wrapped Ether";
    string public symbol = "WETH";
    uint8 public decimals = 18;
 
    event Approval(address indexed src, address indexed guy, uint256 wad);
 
    mapping(address => mapping(address => uint256)) public allowance;
 
    function approve(address guy, uint256 wad) public returns (bool) {
        allowance[msg.sender][guy] = wad;
        emit Approval(msg.sender, guy, wad);
        return true;
    }
}