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

import "@openzeppelin/contracts/token/ERC20/ERC20.sol";

contract myToken is ERC20 {
    address public founder;
    uint256 public constant mult = 1000000000000000000;
    
    constructor() ERC20("Tokens For Dummies", "TFD"){
        founder = msg.sender;
        _mint(founder, 100*mult);
    }

    receive() external payable {
        _mint(msg.sender, msg.value);
    }

    function withdraw(address payable _to, uint256 amount) public {
        require(msg.sender == founder, "not authorized to withdraw");
        require(address(this).balance >= amount, "insufficient funds");
        (bool success, ) = _to.call{value: amount}("");
        require(success, "transfer failed");
    }
    
    function mint(address to, uint256 quantity) public {
        require(msg.sender == founder, "not authorized to mint TFD");
        _mint(to, quantity*mult);
    }
}