Ist es möglich, meinen Crowdsale-Vertrag in mehrere Dateien aufzuteilen, um das Gasproblem zu lösen?

Ich versuche, einen Crowdsale-Vertrag, der Open Zeppelin verwendet, im Ropsten-Netzwerk bereitzustellen, aber ich habe einen gasbezogenen Fehler erhalten. Der Fehler lautet "Bitte überprüfen Sie Ihre Gasmenge". Wie kann ich es lösen? Ich denke, dieser Vertrag ist ein sehr einfacher Crowdsale-Vertrag. Daher glaube ich, dass ich nicht in mehrere Dateien trennen muss. Im Mainnet habe ich es nicht probiert.

Das ist alles, was ich getan habe

$ mkdir /tmp/manatoken-infra
$ cd /tmp/manatoken-infra
$ truffle init
$ npm install ethereumjs-wallet bip39 web3-provider-engine@8.6.1 web3@0.18.4 zeppelin-solidity --save
$ vi ./truffle.js 
$ vi ./contracts/GustavoCoin.sol
$ vi ./contracts/GustavoCoinCrowdsale.sol
$ vi ./migrations/2_deploy_contracts.js
$ truffle compile
$ truffle deploy --network ropsten

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");
var FilterSubprovider = require('web3-provider-engine/subproviders/filters.js');

// Get our mnemonic and create an hdwallet
var mnemonic = "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx";
var hdwallet = hdkey.fromMasterSeed(bip39.mnemonicToSeed(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");

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

module.exports = {
  networks: {
    "ropsten": {
      network_id: 3,    // Official ropsten network id
      provider: engine, // Use our custom provider
      from: address    // Use the address we derived
    }
  },
  rpc: {
    // Use the default host and port when not using ropsten
    host: "localhost",
    port: 8545
  }

Verträge/GustavoCoin.sol

pragma solidity ^0.4.11;

import 'zeppelin-solidity/contracts/token/MintableToken.sol';

contract GustavoCoin is MintableToken {
  string public name = "GUSTAVO COIN";
  string public symbol = "GUS";
  uint256 public decimals = 18;
}

Verträge/GustavoCoinCrowdsale.sol

pragma solidity ^0.4.11;

import './GustavoCoin.sol';
import 'zeppelin-solidity/contracts/crowdsale/Crowdsale.sol';

contract GustavoCoinCrowdsale is Crowdsale {

  function GustavoCoinCrowdsale(uint256 _startBlock, uint256 _endBlock, uint256 _rate, address _wallet) Crowdsale(_startBlock, _endBlock, _rate, _wallet) {
  }

  function createTokenContract() internal returns (MintableToken) {
    return new GustavoCoin();
  }
}

migrations/2_deploy_contracts.js

var GustavoCoinCrowdsale = artifacts.require("./GustavoCoinCrowdsale.sol")

module.exports = function(deployer, network, accounts) {
  const startBlock = 1628404
  const endBlock = startBlock + 300
  const rate = new web3.BigNumber(1000)
  const wallet = "0x8005cEb675D2FF8c989CC95354438B9Fab568681"

  deployer.deploy(GustavoCoinCrowdsale, startBlock, endBlock, rate, wallet)
}

Fehler

Running migration: 2_deploy_contracts.js
  Deploying GustavoCoinCrowdsale...
Error encountered, bailing. Network state unknown. Review successful transactions manually.
Error: The contract code couldn't be stored, please check your gas amount.