Google Play UserCancelled returned although purchase was successful

• Description of your issue
  • Initiate a consumable purchase on Google Play
  • Press the X button or tap off of the native payment dialog window and rapidly press the "1-tap buy" button at the same time.
  • Notice that OnPurchaseFailed was called with the UserCancelled status
  • Attempt to purchase the same consumable product
  • Notice that you receive the native payment dialog error window that states "You already own this item."
  • Notice that OnPurchaseFailed was called with the DuplicateTransaction status and continues to do so until restarting the app.
• Unity Version
  • 2019.4.28f1
• Unity IAP version
  • 3.2.3

Notes:
- Restarting the app does trigger ProcessPurchase as expected
- We've seen this similar behaviour in production and this was an attempt to reproduce the problem

We would be interested to hear if there are any workarounds for these situations where DuplicateTransaction occurs aside from restarting the app. In our logs, we often are able to see that the product in the failure callback does have a transaction id and receipt available.

 

Thanks for the reply and suggestions.

I was considering attempting to manually validate the purchase in the failure callback since we do sometimes have access to the transaction id/receipt. It seemed a bit unorthodox of course if there was some underlying problem causing the issue but I will explore that as a workaround!

We are confident that these are not deferred purchases. We have logging in place for the deferred purchase callback and it is not occurring in these cases. We do see other deferred purchases happening as expected.

I will definitely attempt to reproduce with Unity IAP 4.0.0 and update the thread.

 

I have just tested with Unity IAP 4.0.0 and I was able to reproduce using the same steps that were outlined in the original post.

 

Thanks for looking into it!

 

@JeffDUnity3D, hello! Have a quite similar problem on Android with IAP plugin 3.2.3.

1) Start purchase process on Android device
2) On native "purchase processing..." popup hide application (switch to background mode) but not close
3) Successful debiting money from the user's account
4) Expand application from background
5) IAP plugin get callback from native code without purchases list and with code result "USER_CANCELED"
(UnityEngine.Purchasing.GooglePurchaseUpdatedListener.onPurchasesUpdated())
6) After that plugin goes through failed purchase scenario

The result: user spends money, but does not receive anything
Case's ticket: 1356675_l4603cknhev49f5g