hardhat.config.js

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

const DEFAULT_MNEMONIC = 'test test test test test test test test test test test junk';

/*
 * 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: "0.8.15",
        settings: {
          optimizer: {
            enabled: true,
            runs: 100
          }
        }
      },
      {
        version: "0.6.11",
        settings: {
          optimizer: {
            enabled: true,
            runs: 999999
          }
        }
      },
      {
        version: "0.5.12",
        settings: {
          optimizer: {
            enabled: true,
            runs: 999999
          }
        }
      },
      {
        version: "0.5.16",
        settings: {
          optimizer: {
            enabled: true,
            runs: 999999
          }
        }
      }
    ]
  },
  networks: {
    mainnet: {
      url: `https://mainnet.infura.io/v3/${process.env.INFURA_PROJECT_ID}`,
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    },
    ropsten: {
      url: `https://ropsten.infura.io/v3/${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/${process.env.INFURA_PROJECT_ID}`,
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    },
    rinkeby: {
      url: `https://rinkeby.infura.io/v3/${process.env.INFURA_PROJECT_ID}`,
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    },
    localhost: {
      url: 'http://127.0.0.1:8545',
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    },
    hardhat: {
      initialDate: '0',
      accounts: {
        mnemonic: process.env.MNEMONIC || DEFAULT_MNEMONIC,
        path: "m/44'/60'/0'/0",
        initialIndex: 0,
        count: 20,
      },
    }
  },
  gasReporter: {
    currency: 'USD',
    coinmarketcap: process.env.COINMARKETCAP_KEY,
    enabled: !!process.env.REPORT_GAS,
  },
  etherscan: {
    apiKey: `${process.env.ETHERSCAN_API_KEY}`,
  }
};