标签: hardhat

我需要能够从合同中检索文档，由用户钱包对其进行签名，然后发送回合同并验证签名。

以下是我如何在客户端对 address0 进行签名：

   let message : string = "check this message signed by account0";
   let messageHash = keccak256(utils.toUtf8Bytes(message));
   let signature = await address0.signMessage(messageHash);
   await hm.connect(address0).verifyMessage(message, signature);

这是我合同中的验证器：

   function verifyMessage(string memory message, 
      bytes memory signature) 
      public view  returns(bool) {
      
        //hash the plain text message
        bytes32 messagehash =  keccak256(bytes(message));
        //hash the prefix and messagehash together   
        bytes32 messagehash2 = keccak256(abi.encodePacked("\x19Ethereum Signed Messsage:\n32", messagehash));
        //extract the signing contract address
        address signeraddress = ECDSA.recover( messagehash2, signature);
        if (msg.sender==signeraddress) {
            //The message is authentic
            return …

我正在尝试在 Hardhat 中测试我的智能合约，但为了做到这一点，我首先需要向我的合约发送一些 ERC20 代币（对于此测试，我使用 USDC）。

在我的测试中，我模拟了 USDC 鲸鱼，但如何实际将 USDC 转移到我的合约中？

it("USDC test", async function () {
    const testContract =
        await ethers.getContractFactory("TestContract")
            .then(contract => contract.deploy());
    await testContract.deployed();

    // Impersonate USDC whale
    await network.provider.request({
        method: "hardhat_impersonateAccount",
        params: [USDC_WHALE_ADDRESS],
    });
    const usdcWhale = await ethers.provider.getSigner(USDC_WHALE_ADDRESS);

    // Need to transfer USDC from usdcWhale to testContract
});

尝试使用 Hardhat 部署智能合约但出现配置错误。

这是完整的错误详细信息

Error HH9: Error while loading Hardhat's configuration.
You probably tried to import the "hardhat" module from your config or a file imported from it.
This is not possible, as Hardhat can't be initialized while its config is being defined.

所有插件似乎都已正确安装。

部署.js

const hre = require("hardhat");

async function main() {
  const TestContract = await hre.ethers.getContractFactory("TestContract");
  const superInstance = await TestContract.deploy("TestContractHAT", "SMC");
  await superInstance.deployed();
  console.log("contract was deployed to:", superInstance.address());
}

// We recommend this pattern to be able …

以下代码找不到“ethers”：

import { HardhatUserConfig, task } from "hardhat/config";
import "@nomicfoundation/hardhat-toolbox";

task('read',async () => {
    const contract = ethers.getContractFactory('AwesomeContract');
    // ...
})

const config: HardhatUserConfig = {
  solidity: "0.8.15",
};

export default config;

开发者当然不能这样做：

import { ethers } from 'hardhat';

因为它抛出HH9。

是否可以在打字稿任务中使用hardhat.ethers？

我目前在一个 nft 市场工作，希望对每笔销售收取 2.5% 的费用。我已经在线阅读和研究了如何计算坚固性百分比，并在这方面取得了成功，但问题是结果是一个巨大的数字，即 2.5 * 150/100 应该返回 3.75 但我得到这个数字： 3750000000000000000000000000000000000

我的测试

const auctionPrice = ethers.utils.parseUnits("1", "ether");

const [_, userAddress] = await ethers.getSigners();
    let fee = (2.5 * auctionPrice) / 100;
    const commission = ethers.utils.parseUnits(fee.toString(), "ether");
    let commissionValue = commission.toString();

    console.log(commission.toString());
    console.log(fee);

    await market
      .connect(userAddress)
      .createMarketSale(nftContractAddress, 1, commissionValue, {
        value: auctionPrice,
      });

结果

250000000000000000000000000000000

 1 failing

  1) NFTMarket
       Should create and execute market sales:
     Error: Transaction reverted: function call failed to execute
      at NFTMarket.createMarketSale (contracts/NFTMarket.sol:165)
      at processTicksAndRejections (node:internal/process/task_queues:96:5)
      at …

这是我的hardhat.config.js -

module.exports = {
  solidity: "0.8.4",
  networks: {
    hardhat: {
      chainId: 1337
    },
    mumbai: {
      url: "https://rpc-mumbai.matic.today",
      accounts: [process.env.pk]
    },
    // polygon: {
    //   url: "https://polygon-rpc.com/",
    //   accounts: [process.env.pk]
    // }
  }
};

运行 npx Hardhat 测试时出现以下错误：

**Error HH8: There's one or more errors in your config file:
   Invalid account: #0 for network: mumbai - Expected string, received undefined**`

我的 Hardhat.config.js 文件似乎有一些错误，但无法找到。我正在使用 Nader Dabit 的 full-stack-web3 教程进行全栈 web3 开发。