15_RequireString

15. RequireString

运行

根据Foundry 官方文档配置好运行环境后，于本项目下执行下列命令，即可看到实际 gas 差异对比。

forge test --contracts 15_RequireString/RequireString.t.sol --gas-report

功能简述

在solidity中，require()中的错误信息会影响会存储在链上，影响交易成本，较短的错误信息会消耗较少的Gas，因为它们占用的字节更少。

通过精简错误信息，可以在智能合约的操作中节省Gas成本。

DemoCode

下面示例中，调用 shortString 函数比调用 longString 函数每次节省 231 gas

contract RequireString {
    uint256 balance;

    // good: gas 2347
    function shortString() public view {
        require(balance > 0, "Bad Balance"); //good
    }

    // bad: gas 2578
    function longString() public view {
        require(balance > 0, "The era of digitalization has made the concept of instant gratification a norm, especially in financial transactions where the desire for seamless, effortless, and real-time processing is ever increasing. However, the swift and convenient completion of transactions is sometimes hindered by an obstacle that many of us are familiar with: insufficient account balance."); //bad
    }
}

数据类型	gas 消耗	节省	结果
longString	2578
shortString	2347	231	✅ 建议