Lesson 6: 'network.config.chainId' is 'undefined'

[4O4MAGlC1AN]

When I tested the script, I found that the program could not enter the if statement, so I output the judgment condition separately and found this problem.

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

// async main
async function main() {
  const SimpleStorageFatory = await ethers.getContractFactory("SimpleStorage");
  console.log("Deploying contract...");
  const simpleStorage = await SimpleStorageFatory.deploy();
  await simpleStorage.deployed();
  console.log(`Deployed contract to: ${simpleStorage.address}`);
  console.log(network.config.chainId);

  if (network.config.chainId === 11155111 && process.env.ETHERSCAN_API_KEY) {
    await simpleStorage.deployTransaction.wait(6);
    await verify(simpleStorage.address, []);
  }

  // const currentValue = await simpleStorage.retrieve();
  // console.log(`Current Value is: ${currentValue}`);

  // const transactionResponse = await simpleStorage.store(7);
  // await transactionResponse.wait(1);
  // const updateValue = await simpleStorage.retrieve();
  // console.log(`Updated Value is: ${updateValue}`);
}

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("Already Verified!");
    } else {
      console.log(e);
    }
  }
}

// main
main()
  .then(() => process.exit(0))
  .catch((error) => {
    console.error(error);
    process.exit(1);
  });

This is the result

Deploying contract...
Deployed contract to: 0xFf4F5F0FCd0e11f0B709252B3CF955D352FA64A9
undefined

require("@nomiclabs/hardhat-waffle");
require("dotenv").config();
require("@nomiclabs/hardhat-etherscan");

// This is a sample Hardhat task. To learn how to create your own go to
// https://hardhat.org/guides/create-task.html
task("accounts", "Prints the list of accounts", async (taskArgs, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

// You need to export an object to set up your config
// Go to https://hardhat.org/config/ to learn more

/**
 * @type import('hardhat/config').HardhatUserConfig
 */

const SEPOLIA_RPC_URL = process.env.SEPOLIA_RPC_URL;
const PRIVATE_KEY = process.env.PRIVATE_KEY;
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY;

module.exports = {
  networks: {
    sepolia: {
      url: SEPOLIA_RPC_URL,
      accounts: [PRIVATE_KEY],
      chainID: 11155111,
    },
  },
  solidity: "0.8.8",
  etherscan: {
    apiKey: ETHERSCAN_API_KEY,
  },
};