title: Restore InApp purchase using swift, iOS
body: <p>I am implementing restore in app purchase. I have a button whose action is </p>
  
  <pre><code>@IBAction func restorePurchases(send : AnyObject){
  
  SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
  // if (success) { 
  // I want to do something here      
  // }
  }
  </code></pre>
  
  <p>My question is.</p>
  
  <ol>
  <li>Is this the right way to restore?</li>
  <li>How can we verify success action for restoring purchases?</li>
  </ol>