hardhat.config.js

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

const INFURA_API_KEY = process.env.INFURA_API_KEY;
const RINKEBY_PRIVATE_KEY = process.env.RINKEBY_PRIVATE_KEY;
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY;
const PK_2 = process.env.PK_2;
const MATIC_DEPLOYER = process.env.MATIC_DEPLOYER;

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
  solidity: {
    version: "0.8.15",
    settings: {
      optimizer: {
        enabled: true,
        runs: 1000,
      },
    },
  },
  networks: {
    rinkeby: {
      url: `https://rinkeby.infura.io/v3/${INFURA_API_KEY}`,
      accounts: [`${RINKEBY_PRIVATE_KEY}`]
    },
    mumbai: {
      url: `https://polygon-mumbai.infura.io/v3/${INFURA_API_KEY}`,
      accounts: [`${RINKEBY_PRIVATE_KEY}`]
    },
    kovan: {
      url: `https://kovan.infura.io/v3/${INFURA_API_KEY}`,
      accounts: [`${RINKEBY_PRIVATE_KEY}`]
    },
    goerli: {
      url: `https://goerli.infura.io/v3/${INFURA_API_KEY}`,
      accounts: [`${RINKEBY_PRIVATE_KEY}`, `${PK_2}`]
    },
    polygon: {
      url: `https://polygon-mainnet.infura.io/v3/${INFURA_API_KEY}`,
      accounts: [`${MATIC_DEPLOYER}`]
    }
  },
  etherscan: {
    apiKey: `${ETHERSCAN_API_KEY}`
  }
};