truffle-config.js

require('ts-node/register')
// OPTIONAL: Allows the use of tsconfig path mappings with ts-node
require('tsconfig-paths/register')

const HDWalletProvider = require('@truffle/hdwallet-provider')


module.exports = {
  // See <http://truffleframework.com/docs/advanced/configuration>
  // for more about customizing your Truffle configuration!

  migrations_directory: './migrations',
  contracts_build_directory: './build/contracts',
  plugins: ['solidity-coverage', 'truffle-plugin-verify'],
  api_keys: {
    etherscan: ''
  },
  networks: {
    development: {
      host: '127.0.0.1',
      port: 7545,
      network_id: '*', // Match any network id
      gas: 8000000
    },
    fork: {
      host: '127.0.0.1',
      port: 7545,
      network_id: '*', // Match any network id
      gas: 8000000
    },
    coverage: {
      host: "127.0.0.1",
      port: 7546,
      network_id: "*",
      gas: 0xfffffffffff, // <-- Use this high gas value
      gasPrice: 0x01      // <-- Use this low gas price
    },
    ropsten: {
      provider() {
        return new HDWalletProvider("", `https://ropsten.infura.io/v3/`, 0, 3)
      },
      network_id: 3,
      gasPrice: 100000000001, // 100 GWei,
      skipDryRun: true,
      gas: 8000000
    }
  },
  mocha: {
    reporter: 'eth-gas-reporter',
    reporterOptions: {
      currency: 'USD'
    }
  },
  compilers: {
    solc: {
      version: '0.5.16',
      settings: {
        optimizer: {
          enabled: true,
          runs: 200
        }
      }
    }
  }
}