hardhat.config.js

require("@nomiclabs/hardhat-waffle");
require('@nomiclabs/hardhat-ethers');
require('@openzeppelin/hardhat-upgrades');
require("@nomiclabs/hardhat-etherscan");
require('dotenv').config();

const KEY = process.env.KEY;
const PRIVATE_KEY = process.env.PRIVATE_KEY;
const ETHERSCAN_KEY = process.env.ETHERSCAN_KEY;

// 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 () => {
  const accounts = await 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
 */
module.exports = {
  solidity: "0.8.0",
  networks: {
    kovan: {
    url: `https://eth-kovan.alchemyapi.io/v2/${KEY}`,
    accounts: [PRIVATE_KEY]
    }
  },
  etherscan: {
    apiKey: ETHERSCAN_KEY
  }
}