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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
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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
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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
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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
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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
