// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

import { ERC20 } from '@openzeppelin/contracts/token/ERC20/ERC20.sol';
import { ERC20Permit } from '@openzeppelin/contracts/token/ERC20/extensions/ERC20Permit.sol';

contract WETH is ERC20('Wrapped Ether', 'WETH'), ERC20Permit('Wrapped Ether') {
    event Deposit(address indexed dst, uint256 wad);
    event Withdrawal(address indexed src, uint256 wad);

    receive() external payable {
        deposit();
    }

    function deposit() public payable {
        _mint(msg.sender, msg.value);
        emit Deposit(msg.sender, msg.value);
    }

    function withdraw(uint256 amount) external {
        _burn(msg.sender, amount);
        payable(msg.sender).transfer(amount);
        emit Withdrawal(msg.sender, amount);
    }
}