hardhat.config.js

require("dotenv").config();

require('hardhat-contract-sizer');
require("@nomiclabs/hardhat-waffle");
require(`@nomiclabs/hardhat-etherscan`);
require("solidity-coverage");
require('hardhat-gas-reporter');
require('hardhat-deploy');
require('hardhat-deploy-ethers');
require('@openzeppelin/hardhat-upgrades');
require('./tasks');

const testPrivKey = process.env.TEST_PRIV_KEY;

/**
 * @type import('hardhat/config').HardhatUserConfig
 */
module.exports = {

  solidity: {
    compilers: [
      {
        version: "0.8.9",
        settings: {
          optimizer: {
            enabled: true,
            runs: 200
          }
        }
      },
      {
        version: "0.8.12",
        settings: {
          optimizer: {
            enabled: true,
            runs: 200
          }
        }
      }
    ]
  },

  // solidity: "0.8.9",
  contractSizer: {
    alphaSort: false,
    runOnCompile: true,
    disambiguatePaths: false,
  },

  namedAccounts: {
    deployer: {
      default: 0,    // wallet address 0, of the mnemonic in .env
    },
    proxyOwner: {
      default: 1,
    },
  },

  networks: {
    ethereum: {
      url: "https://mainnet.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161", // public infura endpoint
      chainId: 1,
      accounts: [testPrivKey],
    },
    bsc: {
      url: "https://bsc-dataseed1.binance.org",
      chainId: 56,
      accounts: [testPrivKey],
    },
    avalanche: {
      url: "https://api.avax.network/ext/bc/C/rpc",
      chainId: 43114,
      accounts: [testPrivKey],
    },
    polygon: {
      url: "https://rpc-mainnet.maticvigil.com",
      chainId: 137,
      accounts: [testPrivKey],
    },
    arbitrum: {
      url: `https://arb1.arbitrum.io/rpc`,
      chainId: 42161,
      accounts: [testPrivKey],
    },
    optimism: {
      url: `https://mainnet.optimism.io`,
      chainId: 10,
      accounts: [testPrivKey],
    },
    fantom: {
      url: `https://rpcapi.fantom.network`,
      chainId: 250,
      accounts: [testPrivKey],
    },
    goerli: {
      url: "https://goerli.infura.io/v3/9aa3d95b3bc440fa88ea12eaa4456161", // public infura endpoint
      chainId: 5,
      accounts: [testPrivKey],
    },
    mumbai: {
      url: "https://rpc-mumbai.maticvigil.com/",
      chainId: 80001,
      accounts: [testPrivKey],
    }
  }
};