    function buy(uint256 _amount) external payable {
        uint24 amount = uint24(_amount);
        Sale memory temp = sale;
        IEscher721 nft = IEscher721(temp.edition);
        require(block.timestamp >= temp.startTime, "TOO SOON");
        require(block.timestamp < temp.endTime, "TOO LATE");
        require(amount * sale.price == msg.value, "WRONG PRICE"); //@audit overflow
    require(uint256(amount) * sale.price == msg.value, "WRONG PRICE");
