truffle.js

var bip39 = require("bip39");
var hdkey = require('ethereumjs-wallet/hdkey');
var ProviderEngine = require("web3-provider-engine");
var WalletSubprovider = require('web3-provider-engine/subproviders/wallet.js');
var Web3Subprovider = require("web3-provider-engine/subproviders/web3.js");
var Web3 = require("web3");

// Get our mnemonic and create an hdwallet

var mnemonic = require('./mnemonic.js');
var hdwallet = hdkey.fromMasterSeed(bip39.mnemonicToSeed(mnemonic.mnemonic()));

// Get the first account using the standard hd path.
var wallet_hdpath = "m/44'/60'/0'/0/";
var wallet = hdwallet.derivePath(wallet_hdpath + "0").getWallet();
var address = "0x" + wallet.getAddress().toString("hex");
console.log("using address: " + address)

var providerUrl = "https://rinkeby.infura.io";
var testnet_engine = new ProviderEngine();
testnet_engine.addProvider(new WalletSubprovider(wallet, {}));
testnet_engine.addProvider(new Web3Subprovider(new Web3.providers.HttpProvider(providerUrl)));
testnet_engine.start(); // Required by the provider engine.

var providerUrl = "https://ropsten.infura.io";
var ropsten_engine = new ProviderEngine();
ropsten_engine.addProvider(new WalletSubprovider(wallet, {}));
ropsten_engine.addProvider(new Web3Subprovider(new Web3.providers.HttpProvider(providerUrl)));
ropsten_engine.start(); // Required by the provider engine.

var providerUrl = "https://mainnet.infura.io";
var mainnet_engine = new ProviderEngine();
mainnet_engine.addProvider(new WalletSubprovider(wallet, {}));
mainnet_engine.addProvider(new Web3Subprovider(new Web3.providers.HttpProvider(providerUrl)));
mainnet_engine.start(); // Required by the provider engine.

module.exports = {
  migrations_directory: "./migrations",
  networks: {
    ropsten: {
      network_id: 3,    // Official ropsten network id
      provider: ropsten_engine, // Use our custom provider
      from: address,     // Use the address we derived
      gasPrice: '0x2756CD00' , /// .66 gwei
      gasPrice: '0x24E160300' , /// 9.9 gwei
    },
    rinkeby: {
      network_id: 4,    // Official rinkeby network id
      provider: testnet_engine, // Use our custom provider
      from: address,     // Use the address we derived
      gasPrice: '0x2756CD00' , /// .66 gwei
      gasPrice: '0x24E160300' , /// 9.9 gwei
    },
    mainnet: {
      network_id: 1,    // Official mainnet network id
      provider: mainnet_engine, // Use our custom provider
      from: address,     // Use the address we derived
      //gasPrice: '0x13AB6680' , /// 33 gwei
      gasPrice: '0x38fa6ae00' , /// 66 gwei
    },
    development: {
      host: "localhost",
      port: 8545,
      network_id: "*",
      from: "0xd3d280c2866eaa795fc72bd850c48e7cce166e23",
      gasLimit: 0xfffffffffff, 
      gasPrice: 0x01          
  }
  }
};