truffle-config.js

/*
 * NB: since truffle-hdwallet-provider 0.0.5 you must wrap HDWallet providers in a
 * function when declaring them. Failure to do so will cause commands to hang. ex:
 * ```
 * mainnet: {
 *     provider: function() {
 *       return new HDWalletProvider(mnemonic, 'https://mainnet.infura.io/<infura-key>')
 *     },
 *     network_id: '1',
 *     gas: 4500000,
 *     gasPrice: 10000000000,
 *   },
 */

var provider, address;
const privKey = "PVTKEY";
const PrivateKeyProvider = require("truffle-privatekey-provider");

 module.exports = {
   networks: {
     development: {
       host: "localhost",
       port: 9545,
       network_id: "*" // Match any network id
     },
     mainnet: {
        network_id: 1,
    },
    ropsten: {
      network_id: 3,
      provider: () => new PrivateKeyProvider(privKey, "https://ropsten.infura.io/v3/APIKEY"),
      gas: 4000000
    },
    rinkeby: {
      provider: () => new PrivateKeyProvider(privKey, "https://rinkeby.infura.io/v3/APIKEY"),
      gasPrice: 50000000000,
      network_id: 4,
    },
   }
 };