Hardhat - 警告合约代码超长解决方案

编译合约时警告 合约代码超长,编译命令:

npx hardhat compile

警告信息如下:

Warning: Contract code size exceeds 24576 bytes (a limit introduced in Spurious Dragon). This contract may not be deployable on mainnet. Consider enabling the optimizer (with a low "runs" value!), turning off revert strings, or using libraries.
    --> contracts/ContractXXX sol:1154:1:
     |
1154 | contract ContractXXX is AccessControl, ERC721, Contract {
     | ^ (Relevant source part starts here and spans across multiple lines).

由于合约内容较多,在Remix中编译时也出现 以上警告信息,若不解决,部署时会报错,在Remix中编译时选中“Enable optimization”,在Hardhat中编译需要配置文件添加如下内容:

module.exports = {
  solidity: {
    version: "0.8.4",
    settings: {
      optimizer: {
        enabled: true,
        runs: 200
      }
    }
  },
};

设置完成后再次编译正常,部署也正常了。


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