title: How to get Paypal transaction Id after getting paykey in paypal integration in iphone?
body: <p>I am going to implement paypal in my iphone native app. But I am facig an issue in that.</p>
  
  <p>I want to get my transaction Id regarding my PayKey. There is a direct method to get pay key in PayPal library to get PayKey but not a method to get <strong>transactionId</strong>.</p>
  
  <p>Here is that method:</p>
  
  <pre><code>-(void)paymentSuccessWithKey:(NSString *)payKey andStatus:(PayPalPaymentStatus)paymentStatus;
  </code></pre>
  
  <p>As I am thinking IPN(Instant Payment Notification ) can help to resolve this issue but I don't know how to implement that one in my app?</p>
  
  <p>Please help me to resolve this issue.</p>
  
  <p>Thanks,
  Chandra Prakash</p>