hardhat.config.js

require("@nomiclabs/hardhat-waffle");
require("solidity-coverage");
require("@nomiclabs/hardhat-solhint");

const { TESTNET_PRIVATE_KEY, MAINNET_PRIVATE_KEY, INFURA_PROJECT_ID } = require('./.secrets.json');

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
  solidity: {
    version: "0.8.4",
    optimizer: {
      enabled: true,
      runs: 200
    }
  },
  networks: {
    mainnet: {
      url: `https://mainnet.infura.io/v3/${INFURA_PROJECT_ID}`,
      accounts: [`0x${MAINNET_PRIVATE_KEY}`],
    },
    ropsten: {
      url: `https://ropsten.infura.io/v3/${INFURA_PROJECT_ID}`,
      accounts: [`0x${TESTNET_PRIVATE_KEY}`],
    },
    rinkeby: {
      url: `https://rinkeby.infura.io/v3/${INFURA_PROJECT_ID}`,
      accounts: [`0x${TESTNET_PRIVATE_KEY}`],
    },
    goerli: {
      url: `https://goerli.infura.io/v3/${INFURA_PROJECT_ID}`,
      accounts: [`0x${TESTNET_PRIVATE_KEY}`],
    },
    kovan: {
      url: `https://kovan.infura.io/v3/${INFURA_PROJECT_ID}`,
      accounts: [`0x${TESTNET_PRIVATE_KEY}`],
    },
  }
};