truffle-config.js

require('dotenv').config();
const path = require('path');
// const HDWalletProvider = require("@truffle/hdwallet-provider");
const PrivateKeyProvider = require('truffle-privatekey-provider');

module.exports = {
  contracts_build_directory : path.join(__dirname, "build/contracts"),
  
  networks: {
    development: {
      host: 'localhost',
      port: 8546,
      gas: 6721975,
      network_id: '*', // eslint-disable-line camelcase,
    },
    rootchain: {
      host: 'localhost',
      port: 8546,
      gas: 7500000,
      gasPrice: 1e9,
      network_id: '*', // eslint-disable-line camelcase
      websocket: true,
    },
    plasma: {
      host: 'localhost',
      port: 8547,
      gas: 7500000,
      gasPrice: 1e9,
      network_id: '*', // eslint-disable-line camelcase
    },
    faraday: {
      provider: () => new HDWalletProvider([process.env.FARADAY_PRIVATE_KEY], process.env.FARADAY_PROVIDER_URL),
      network_id: 16, // eslint-disable-line camelcase
      production: true,
    },
    rinkeby: {
      provider: () => new PrivateKeyProvider(process.env.RINKEBY_PRIVATE_KEY, process.env.RINKEBY_PROVIDER_URL),
      network_id: 4, // eslint-disable-line camelcase
      gasPrice: 5e9,
      skipDryRun: true,
    },
    ropsten: {
      provider: () => new HDWalletProvider([process.env.ROPSTEN_PRIVATE_KEY], process.env.ROPSTEN_PROVIDER_URL),
      network_id: 3, // eslint-disable-line camelcase
      gasPrice: 100e9,
      production: true,
      skipDryRun: true,
    },
    mainnet: {
      provider: () => new PrivateKeyProvider(process.env.MAINNET_PRIVATE_KEY, process.env.MAINNET_PROVIDER_URL),
      network_id: 1, // eslint-disable-line camelcase
      gasPrice: 100e9,
      skipDryRun: true,
    },
  //   ropsten: {
  //     provider: ropstenProvider,
  //     network_id: 3, // eslint-disable-line camelcase
  //   },
  //   coverage: {
  //     host: 'localhost',
  //     network_id: '*', // eslint-disable-line camelcase
  //     port: 8555,
  //     gas: 0xfffffffffff,
  //     gasPrice: 0x01,
  //   },
  //   ganache: {
  //     host: 'localhost',
  //     port: 8545,
  //     network_id: '*', // eslint-disable-line camelcase
  //   },
  },
  mocha: {
    reporter: 'eth-gas-reporter',
    reporterOptions: {
      currency: 'USD',
      gasPrice: 21,
    },
    useColors: true,
    before_timeout: 520000 ,
    enableTimeouts: false,
    bail: true, 
    // Here is 2min but can be whatever timeout is suitable for you.
  },
  compilers: {
    solc: {
      version: '0.7.6',
      settings: {
        optimizer: {
          enabled: true,
          runs: 200,
        },
      },
    },
  },
};