无法编译多个 Solidity 版本

问题描述

我正在尝试编译（通过安全帽）一个导入多个具有不同 solidity 版本的接口的合同，但出现以下错误：

Error HH606: The project cannot be compiled,see reasons below.

These files and its dependencies cannot be compiled with your config. This can happen because they have incompatible solidity pragmas,or don't match any of your configured solidity compilers.

  * contracts/FlashLoaner.sol

Flashloaner.sol：

pragma solidity >=0.5.0 <=0.8.0;

import '@uniswap/v2-periphery/contracts/interfaces/IWETH.sol';
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import '@aave/protocol-v2/contracts/interfaces/ILendingPool.sol'; //---> Issue
import "hardhat/console.sol";


contract FlashLoaner {
    struct MyCustomData {
        address token;
        uint256 repayAmount;
    }

    address public logicContract;
    
    function execute(address _weth,address _contract) external view {
        console.log(_weth);
    }
}

问题在于 @aave/protocol-v2/contracts/interfaces/ILendingPool.sol。如果我把它注释掉，我的合同就编译好了。

IlendingPool.sol：pragma solidity 0.6.12;

IERC20.sol：pragma solidity ^0.5.0;

IWETH.sol：pragma solidity >=0.5.0;

Hardhat.config：

module.exports = {
  solidity: {
    compilers: [
      {
        version: "0.5.7"
      },{
        version: "0.8.0"
      },{
        version: "0.6.12"
      }
    ]
  }
   ...

解决方法

解决方案：

从每个接口中获取我感兴趣的函数的签名，并使用 pragma solidity ^0.8.0 将它们放在我自己的接口上。​​