摘要：truffle migrate --network sepolia 报错 Error: There was a timeout while attempting to connect to the network at undefined. Check to see that your provid
阅读全文
摘要：运行 truffle migrate 报错 *** Deployment Failed *** "TestT**" hit an invalid opcode while deploying. Try: * Verifying that your constructor params satisfy
阅读全文
摘要：运行 truffle compile 报错 Error: Truffle is currently using solc 0.8.13, but one or more of your contracts specify "pragma solidity ^0.8.20". 修改 truffle-c
阅读全文
摘要：运行以下 // SPDX-License-Identifier: MIT pragma solidity 0.7.5; import {Counters} from "@openzeppelin/contracts/utils/Counters.sol"; contract MyToken is E
阅读全文
摘要：contract目录下 Storage.sol // SPDX-License-Identifier: GPL-3.0 pragma solidity >=0.8.2 <0.9.0; /** * @title Storage * @dev Store & retrieve value in a va
阅读全文
