hardhat.config.js

require("@nomiclabs/hardhat-waffle");
// require("@metis.io/hardhat-mvm");
require('@openzeppelin/hardhat-upgrades');
const { config } = require('dotenv');
const { resolve } = require('path');

config({ path: resolve(__dirname, "./.env") });

// 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 () => {
  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

let mnemonic;
if (!process.env.MNEMONIC) {
  throw new Error("Please set your MNEMONIC in a .env file");
} else {
  mnemonic = process.env.MNEMONIC;
}

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {
  solidity: "0.6.12",
  networks: {
    hardhat: {
    },
    mainnet: {
      url: 'https://andromeda.metis.io/?owner=1088',
      accounts: {
        mnemonic,
      }
    },
    metis: {
      url: 'https://stardust.metis.io/?owner=588',
      accounts: {
        mnemonic,
      },
      gasPrice: 1000000000,
    },
    rinkeby: {
      url: "https://eth-rinkeby.alchemyapi.io/v2/bB-zVrK3Ss2vb1s5yoEctncbk9fRIm1e",
      accounts: { mnemonic }
    }
  },
  solidity: {
    version: "0.6.12",
    settings: {
      optimizer: {
        enabled: true,
        runs: 9999
      }
    }
  },
  // ovm: {
  //   solcVersion: '0.6.12', // Currently, we only support 0.5.16, 0.6.12, and 0.7.6 of the Solidity compiler           
  //   optimizer: true,
  //   runs: 9999
  // },
};