// SPDX-License-Identifier: AGPL-3.0-only
pragma solidity >=0.8.0;
import {ERC20} from "solmate/tokens/ERC20.sol";
import {SafeTransferLib} from "solmate/utils/SafeTransferLib.sol";
/// @notice Minimalist and modern Wrapped Ether implementation.
/// @author Solmate (https://github.com/transmissions11/solmate/blob/main/src/tokens/WETH.sol)
/// @author Inspired by WETH9 (https://github.com/dapphub/ds-weth/blob/master/src/weth9.sol)
contract WETH is ERC20("Wrapped Ether", "WETH", 18) {
using SafeTransferLib for address;
event Deposit(address indexed from, uint256 amount);
event Withdrawal(address indexed to, uint256 amount);
function deposit() public payable virtual {
_mint(msg.sender, msg.value);
emit Deposit(msg.sender, msg.value);
}
function withdraw(uint256 amount) public virtual {
_burn(msg.sender, amount);
emit Withdrawal(msg.sender, amount);
msg.sender.safeTransferETH(amount);
}
receive() external payable virtual {
deposit();
}
}