hardhat.config.js

require("@nomiclabs/hardhat-waffle");
require("@nomiclabs/hardhat-etherscan");
require('dotenv').config();
require('hardhat-contract-sizer');
require("hardhat-gas-reporter");

// 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);
  }
});

module.exports = {
  solidity: {
    compilers: [
      {
        version: "0.8.4",
        settings: {
          optimizer: {
            enabled: true,
            runs: 200,
          },
        },
      },
      {
        version: "0.8.0"
      },
      {version: "0.4.24"}
    ]
  },
  networks: {
    ropsten: {
      url: `https://eth-ropsten.alchemyapi.io/v2/${process.env.ALCHEMY_API_KEY}`,
      accounts: [`0x${process.env.PRIVATE_KEY}`]
    },
    kovan: {
      url: `${process.env.KOVAN_RPC_URL}`,
      accounts: [`0x${process.env.PRIVATE_KEY}`]
    },
    rinkeby: {
      url: `${process.env.RINKEBY_RPC_URL2}`,
      accounts: [`0x${process.env.PRIVATE_KEY}`]
    }
  },
  etherscan: {
    apiKey: process.env.ETHERSCAN_API_KEY
  },
  contractSizer: {
    alphaSort: true,
    disambiguatePaths: false,
    runOnCompile: true,
    strict: true,
  },
  gasReporter: {
    currency: 'EUR',
    gasPrice: 100,
    enabled: true,
    //onlyCalledMethods: false,
  }

};