hardhat.config.ts

import { config as dotEnvConfig } from "dotenv";
dotEnvConfig();

import { task } from "hardhat/config";
import { HardhatUserConfig } from "hardhat/types";
import '@openzeppelin/hardhat-upgrades';
import "@nomiclabs/hardhat-waffle";
import "@nomiclabs/hardhat-etherscan";
import "hardhat-typechain";
import "solidity-coverage";

task("accounts", "Prints the list of accounts", async (args, hre) => {
  const accounts = await hre.ethers.getSigners();

  for (const account of accounts) {
    console.log(account.address);
  }
});

const INFURA_API_KEY = process.env.INFURA_API_KEY || "";
const RINKEBY_PRIVATE_KEY =
  process.env.RINKEBY_PRIVATE_KEY ||
  "0xc87509a1c067bbde78beb793e6fa76530b6382a4c0241e5e4a9ec0a0f44dc0d3"; // well known private key
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY;

const config: HardhatUserConfig = {
  defaultNetwork: "hardhat",
  solidity: {
    compilers: [{ version: "0.7.6", settings: {} }],
  },
  networks: {
    hardhat: {},
    localhost: {},
    rinkeby: {
      url: `https://rinkeby.infura.io/v3/${INFURA_API_KEY}`,
      accounts: [RINKEBY_PRIVATE_KEY],
      gasPrice: 50000000000, // 50 gwei,
    },
    coverage: {
      url: "http://127.0.0.1:8555", // Coverage launches its own ganache-cli client
    },
  },
  etherscan: {
    // Your API key for Etherscan
    // Obtain one at https://etherscan.io/
    apiKey: ETHERSCAN_API_KEY,
  },
};

export default config;