Restoring a purchase on Android

Hi,

I've added the Unity IAP on my project and, I'm selling goodies on my game, anyway, how can I check a purchased product (non-consumable) and make it "enabled" for the user after he closes and open the game again?
(I mean for example, how can I check the purchased products when the game is launched?)

 

You will want to track purchases separately, such as storing them in PlayerPrefs. Be sure to test the uninstall/reinstall scenario.

 

Hi Jeff,

Yes, I need to check it, anyway, I'm trying this to check if the product is already purchased every time the scene is loaded, please check this code:

Code (CSharp):

1.  
2. public static string prod01 = "prod01";
3.     public static string prod02 = "prod02"; //Is the same string as in GooglePlay (I'm not showing the real name here on the Forum)
4. private IEnumerator checkProduct(string prodId)
5.     {
6.  
7.         yield return new WaitForSeconds(1);
8.  
9.         Product cProduct = m_StoreController.products.WithID(prodId);
10.         if(cProduct != null && cProduct.hasReceipt)
11.         {
12.             //Already purchased?
13.             if(prodId == prod01)
14.             {
15.                 PlayerPrefs.SetInt("Prod01",1);
16.              
17.             }
18.             else if(prodId == prod02)
19.             {
20.                  PlayerPrefs.SetInt("Prod02",1);
21.              }
22.         }
23.     }

And, after it, I run a verification for that PlayerPrefs to check wich produtcs is "1" then I release it to be choosen by the user.

I really don't know how can I check the products already purchased in the "automatic" check by Unity ADS. Can you point me in the right direction?

 

During the original purchase, ProcessPurchase is called. At this point, you will want to persist locally the purchase information. We only return the receipt on the original purchase. This way, you don't need to check each time with the store controller like you have above, just check PlayerPrefs.

 

Yes Jeff, the problem I'm having is because some users uninstall the game and now install the game again, so, in this case, the "PlayerPrefs" is clean, so, what can I do for these users? I passed the last 3 hours making refunds for the users that can't restore their purchases.

In what method I can check about the purchased products?

 

You could save purchase information to the cloud (your own server) as mentioned here https://docs.unity3d.com/Manual/UnityIAPProcessingPurchases.html or you could use persistent storage as described here https://unity3d.com/learn/tutorials/topics/scripting/persistence-saving-and-loading-data and there is this http://makeinunity.com/2017/04/01/unity-in-app-purchase-sample-with-codeless-iap/

 

Yes, I know that I can do it, I already save the info on PlayerPrefs... My question now is:

How can I know who already purchased the product and who don't ?, so I can save the information for the customers that had purchased the products.

 

For privacy and legal reasons, you can't go back and find out who purchased what products afterwards. You would need to save that information when a user makes the initial purchase. Those articles describe the way you can persist purchases even if the user reinstalls (which is preferred to storing in PlayerPrefs, as you've found out). We don't currently offer inventory management, but is a feature we are discussing.

 

Take a look

https://docs.unity3d.com/Manual/UnityIAPRestoringTransactions.html

On platforms that support it (e.g. Google Play and Universal Windows Applications) Unity IAP automatically restores any products the user owns during the first initialization following reinstallation; the ProcessPurchase method of your IStoreListener will be called for each owned item.

This is what I want! restores all products... Don't want to know exactly "who" is the person that had bought the things, just want to release the product for the ones that had purchased the products 2 days ago, for example.

 

Are you not getting the ProcessPurchase callback for each owned product upon first launch after reinstallation? Can you post the code of what you have for ProcessPurchase?

 

Code (CSharp):

1. public PurchaseProcessingResult ProcessPurchase(PurchaseEventArgs args)
2.     {
3.         if (String.Equals(args.purchasedProduct.definition.id, prod01, StringComparison.Ordinal))
4.         {
5.             PlayerPrefs.SetInt("Prod01",1);
6.         }
7.         else if (String.Equals(args.purchasedProduct.definition.id, prod02, StringComparison.Ordinal))
8.         {
9.             PlayerPrefs.SetInt("Prod02",1);
10.         }
11.         else
12.         {
13.             Debug.Log(string.Format("ProcessPurchase: FAIL. Unrecognized product: '{0}'", args.purchasedProduct.definition.id));
14.         }
15.         return PurchaseProcessingResult.Complete;
16.     }

 

Yes, that looks correct. You should see this called after reinstallation for non-consumables. Please provide the full device logs if you are not. https://forum.unity.com/threads/how-to-capturing-device-logs-on-android.528680/