hardhat.config.js

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

DEFAULT_MNEMONIC = "test test test test test test test test test test test test"

task("accounts", "Prints the list of accounts", async () => {
  const accounts = await 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: "0.8.6",
        settings: {
          optimizer: {
            enabled: true,
            runs: 999999
          }
        }
      },
      {
        version: "0.5.2",
        settings: {
          optimizer: {
            enabled: true,
            runs: 999999
          }
        }
      },
      {
        version: "0.6.12",
        settings: {
          optimizer: {
            enabled: true,
            runs: 999999
          }
        }
      }
    ]
  },
  networks: {
    ropsten: {
      url: `https://ropsten.infura.io/v3/${process.env.INFURA_PROJECT_ID}`,
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    },
    goerli: {
      url: `https://goerli.infura.io/v3/${process.env.INFURA_PROJECT_ID}`,
      gasPrice: 123000000000,
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    },
    rinkeby: {
      url: `https://rinkeby.infura.io/v3/${process.env.INFURA_PROJECT_ID}`,
      gasPrice: 123000000000,
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    },
    mainnet: {
      url: `https://mainnet.infura.io/v3/${process.env.INFURA_PROJECT_ID}`,
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    }
  },
  etherscan: {
    apiKey: `${process.env.ETHERSCAN_API_KEY}`
  }
};