hardhat.config.js

require('dotenv').config();

require('@nomiclabs/hardhat-etherscan');
require('@nomiclabs/hardhat-waffle');
require('hardhat-gas-reporter');
require('solidity-coverage');

// 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: {
    compilers: [
      {
        version: '0.8.16',
      },
      {
        // for MetamorphicContractFactory
        version: '0.5.6',
      },
    ],
  },
  networks: {
    ropsten: {
      url: process.env.ROPSTEN_URL || '',
      accounts:
        process.env.PRIVATE_KEY !== undefined ? [process.env.PRIVATE_KEY] : [],
    },
  },
  gasReporter: {
    enabled: process.env.REPORT_GAS !== undefined,
    currency: 'USD',
  },
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY,
  },
};