hardhat.config.js

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

const mnemonic = process.env["MNEMONIC"];
const etherscanApiKey = process.env['ETHERSCAN_API_KEY']

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);
  }
});

module.exports = {
  networks: {
    localhost: {
      url: "http://localhost:8545"
    },
    mainnet: {
      url: "https://mainnet.infura.io/v3/31418bbd3fe041febb62054997eac515",
      accounts: {
        mnemonic
      }
    },
    ropsten: {
      url: "https://ropsten.infura.io/v3/31418bbd3fe041febb62054997eac515",
      accounts: {
        mnemonic
      }
    },
    matic: {
      url: "https://polygon-mumbai.infura.io/v3/31418bbd3fe041febb62054997eac515",
      gasPrice: 1000000000,
      accounts: {
        mnemonic
      }
    },
    mumbai: {
      url: "https://polygon-mumbai.infura.io/v3/31418bbd3fe041febb62054997eac515",
      gasPrice: 1000000000,
      accounts: {
        mnemonic
      }
    }
  },
  etherscan: {
    apiKey: etherscanApiKey
  },
  solidity: {
    version: "0.8.7",
    settings: {
      optimizer: {
        enabled: true,
        runs: 1000,
      },
    },
  }
};