How to know if completed tokenized payment for Apple Pay was a success or failure after polling?

Retired Boards Appdev Custom Storefronts
1

Question:

My question is how do I know if completing a tokenized payment for an Apple Pay payment was a success or failure after polling for payment.ready == true?

What I’m doing:

First I complete the checkout using the mutation checkoutCompleteWithTokenizedPaymentV3. To confirm this mutation was successful I check the following:

  1. Success block is fired
  2. checkoutUserErrors.count == 0
  3. Payment object is created and not nil (which signifies the async operation of payment has begun).

Second, I then poll on the payment object created for payment.ready == true.

From my understanding payment.ready == true doesn’t signify a successful payment, it only signifies the async operation of the payment processing has finished.

From here how do I know if the payment was a success or failure once payment.ready == true?

Is it safe to do the following check to confirm if payment was successful or not?:

if payment.errorMessage == nil {
   //payment success
} else {
   /// payment failure
}

The sample app seems to fall short here and marks a success regardless of the error message given. The sample app has:

let retry = Graph.RetryHandler

But what if there was an error? Why does it completely disregard the errorMessage?
2

Any thoughts on this @vix ?