Already recorded transaction - Not restoring purchase.

Hello, I'm using IAP on a mobile game that is available on Android. I'm working with Google Play Services and had some problems with conflicts between other SDK.

To be sure that the problem was indeed solved, I decided to reimport most of the SDK and APIs I use in my game, including the Unity IAP 1.20, using the services tab. The problem is that my game DOES recognize the purchase but is not restoring it on Android.

When reading through the logcat, I got the message:

Already recorded transaction GPA.[...]

When I click the button to purchase it, I'm getting:

OnPurchaseFailed: FAIL. Product: '[...]', PurchaseFailureReason: DuplicateTransaction

But the game is not processing this update and my nonConsumable is never set to true. I'm using the IAP script provided at: https://unity3d.com/pt/learn/tutorials/topics/ads-analytics/integrating-unity-iap-your-game with few changes, such as, I removed the subscription and added my own to the nonConsumable products. I also set the variable using:

ES3.Save <bool> ("adRemoval", true);

Under:

PurchaseProcessingResult

When I debug it. "adRemoval" is always false.

[EDIT1]Just to be sure, I added a simple Debug.Log on PurchaseProcessingResult, because the function should be called for each product owned by user and the function is never called.
[EDIT2] I'm currently using Android 7.1.
[EDIT3] This seems to work fine in editor, the problem is when I build it. I get the message UnityIAP Version: 1.21 and OnInitialized: PASS, other then that. Nothing works.

 

After testing for a while, I have concluded that ProcessPurchase method will be called only when the customer purchases a non-consumable product for the first time or during app reinstall. When the customer restarts the game, ProcessPurchase won't be called, so we have to think of a way to store the transaction record when a customer purchases a non-consumable product for the first time?

 

No, Unity can automatically restore non-consumable product when restarting game. Make sure to uncheck "Consume Purchase" in the IAP Button. I just found out..

Edit: Actually no, unchecking "Consume Purchase" will only leave the product in pending state, we still have to find a way to store the transaction record.

 

Are there any plans to fix this?

When implementing IAP in JAVA (non-unity apps) this works fine, and you can get the list of purchases (non-consumables) with an API call, not only when you reinstall.

So this is clearly a Unity bug.

Having to keep an inventory of purchases outside of the Play Store would be a ridiculous solution - full of bugs and customer frustration.

It's worth mentioning that this is a limitation of the Amazon IAP - this is where you need to keep a local inventory, with Google you can use this API: BillingClient.queryPurchases(BillingClient.SkuType.INAPP)

Please make this work in Android, this is a terrible bug.

 

I updated, it seems to work now, thanks a lot!