Event Only Cursed ERC20

erc20.sol

pragma solidity >=0.8.17;

// Cursed ERC20 that does everything in events.
// by @danielvf, based solmate by @transmissions11

abstract contract ERC20 {
    event Transfer(address indexed from, address indexed to, uint256 amount);
    event Approval(address indexed owner, address indexed spender, uint256 amount);

    string public name;
    string public symbol;
    uint8 public immutable decimals;
    uint256 public totalSupply;

    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    constructor(string memory _name, string memory _symbol, uint8 _decimals) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
    }

    /*//////////////////////////////////////////////////////////////
                               Here begins the good stuff
    //////////////////////////////////////////////////////////////*/

    function approve(address spender, uint256 amount) public virtual returns (bool) {
        emit Approval(msg.sender, spender, allowance[msg.sender][spender]=amount);
        return true;
    }

    function transfer(address to, uint256 amount) public virtual returns (bool) {
        emit Transfer(
            msg.sender,
            (balanceOf[to]+=amount)>0?to:to,
            (balanceOf[msg.sender]-=amount)>0?amount:amount
        );
        return true;
    }

    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual returns (bool) {
        emit Transfer(
            (balanceOf[to]+=amount)>0?from:from,
            (balanceOf[from]-=amount)>0?to:to,
            (
                (allowance[from][msg.sender]!=type(uint256).max) 
                ? (allowance[from][msg.sender]=allowance[from][msg.sender]-amount) 
                : 0
            )>0?amount:amount
        );
        return true;
    }
}

my eyes are bleeding