hardhat.config.js

require("dotenv").config();
require("@nomiclabs/hardhat-waffle");
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
 */
module.exports = {
  solidity: "0.8.2",
  networks: {
    mumbai: {
      url: `https://polygon-mumbai.g.alchemy.com/v2/${process.env.ALCHEMY_API_KEY}`,
      accounts: [process.env.PRIVATE_KEY],
    },
    polygon: {
      url: `https://polygon-mainnet.g.alchemy.com/v2/${process.env.ALCHEMY_API_KEY}`,
      accounts: [process.env.PRIVATE_KEY],
    },
  },
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY,
  },
};