hardhat.config.js

require("@nomiclabs/hardhat-waffle");

// 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);
  }
});

// Go to https://www.alchemyapi.io, sign up, create
// a new App in its dashboard, and replace "KEY" with its key
const ALCHEMY_API_KEY = "000065RErBekmt6jpc6J6NAG3TKlxfNt";

// Replace this private key with your Ropsten account private key
// To export your private key from Metamask, open Metamask and
// go to Account Details > Export Private Key
// Be aware of NEVER putting real Ether into testing accounts
const PRIVATE_KEY = "00000000000000000000000000000099b08f705403534d5024a66d75f077769d";

// 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: "0.8.3",
    networks: {
      ropsten: {
         url: `https://eth-ropsten.alchemyapi.io/v2/${ALCHEMY_API_KEY}`,
         accounts: [`0x${PRIVATE_KEY}`],
      },
      goerli: {
        url: `https://eth-goerli.alchemyapi.io/v2/${ALCHEMY_API_KEY}`,
        accounts: [`0x${PRIVATE_KEY}`]
      },
      mainnet: {
        url: `https://eth-mainnet.alchemyapi.io/v2/${ALCHEMY_API_KEY}`,
        accounts: [`0x${PRIVATE_KEY}`]
      }
    }
};