Error deploying contract to Sepolia testnet

[Priyanshu-Desai]

I am currently at Lesson 6: Hardhat Simple Storage at this timestamp: 9:00:19

Below is my code.

deploy.js:

const { ethers, run, network } = require("hardhat");

async function main() {
  const simpleStorageFactory = await ethers.getContractFactory("SimpleStorage");
  console.log("Deploying contract...");
  const simpleStorage = await simpleStorageFactory.deploy();
  await simpleStorage.waitForDeployment();
  simpleStorageAddress = simpleStorage.target;
  console.log(`Contract deployed to: ${simpleStorageAddress}`);
  if (network.config.chainId === 11155111 && process.env.ETHERSCAN_API_KEY) {
    await simpleStorage.deployTransaction.wait(5);
    await verify(simpleStorage.address, []);
  }
}

async function verify(contractAddress, args) {
  console.log("Verifying contract...");
  try {
    await run("verify:verify", {
      address: contractAddress,
      constructorArguments: args,
    });
  } catch (e) {
    if (e.message.toLowerCase().includes("already verified")) {
      console.log("Contract already verified");
    } else console.log(e);
  }

hardhat.config.js:

require("@nomicfoundation/hardhat-toolbox");
require("@nomicfoundation/hardhat-verify");
require("dotenv").config();

/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
  defaultNetwork: "hardhat",
  networks: {
    hardhat: {
      chainId: 31337,
    },
    sepolia: {
      url: process.env.SEPOLIA_RPC_URL,
      accounts: process.env.SEPOLIA_PRIVATE_KEY,
      chainId: 11155111,
    },
  },
  solidity: "0.8.19",
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY,
  },
};

for some reason, when I try to run my code on the Sepolia network, this error gets generated.

> hardhat-simple-storage@1.0.0 run-sepolia
> npx hardhat run scripts/deploy.js --network sepolia

Error HH210: Redefinition of task verify failed. Unsupported operation adding positional param definitions in an overridden task.

For more info go to https://hardhat.org/HH210 or run Hardhat with --show-stack-traces

I have looked around in the documentation, and other threads to find an answer, but i have not found one yet.

Please, kindly help my fix this issue, thank you.

[skarthik05]

Hi @Priyanshu-Desai,

As you're using this module require("@nomicfoundation/hardhat-toolbox");
you can remove this module to avoid module conflicts.

require("@nomicfoundation/hardhat-verify");

This can resolve your issue.