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contracts...MuyContract5.sol

pragma solidity >=0.7.0 <0.9.0;

contract ERC20Token {
    string public name;
    mapping(address => uint256) public balances;
    
    function mint() public {
        balances[tx.origin] ++;
    }
}

contract MyContract {
    address payable wallet;
    address public token;
    
    constructor(address payable _wallet, address _token) {
        wallet = _wallet;
        token = _token;
    }
    
    fallback() external payable {
        buyToken();
    }
    
    receive() external payable {
        buyToken();
    }
    
    
    function buyToken() public payable {
        // ERC20Token _token = ERC20Token(address(token));
        // _token.mint();
        ERC20Token(address(token)).mint();
        wallet.transfer(msg.value);
    }
}