// SPDX-License-Identifier: MIT pragma solidity 0.8.13; import {ERC20} from "../ERC20.sol"; contract YulERC20 is ERC20 { address public immutable owner; constructor() ERC20("abc", "ABC") { _mint(msg.sender, 1000000e18); owner = msg.sender; } function mint(address receiver, uint256 amount) external { require(msg.sender == owner, "only owner"); _mint(receiver, amount); } function burn(uint256 amount) external { _burn(msg.sender, amount); } }