Using In-app Products, we can detect if user own a product by it's sku, if he is connected with same Google account as payment was made. But if we consume this in-app product, so it's not owned anymore, how can we know this user paid for this in-app product? As per their docs there is no way.
Only implementing own backend logic but the problem is that we have to implement auth to remember user's state (how many sku does he consume).
Yeah, when they are consumed, they are gone.
In this case you want to use non-consumable products for in app purchases. These remain to be coupled with the Google Account. With this, whenever we are retrieving the list of bought products of a user, the library will return the product if it was previously bought on that Google Account. Basically it is never consumed and remains coupled to the account.
By using these non-consumable products, we can easily 'restore' purchases for users when they have a new device for example. But non-consumable products are a one-time buy and are more used for 'unlocking' some content or features. As result, it cannot be used to see 'how many' times it was bought, as it's just a one-time buy.
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I have developed an app in which I want to give a premium version of an app with ad removal and some extra features in-app products.
So, my question is how to verify if a user had purchased already; Then, when a user opens the app, I know if I should give them a premium interface.
Here's the documentation overview for In App Billing, where it says:
Google Play tracks and manages the ownership information of managed products. When a user purchases a managed product, Google Play stores the purchase information for each product on a per-user basis. This enables you to later query Google Play at any time to restore the state of the products a specific user has purchased. This information is persistent on the Google Play servers even if the user uninstalls the application or if they change devices.
To provide premium content, you'll need to create a managed product that doesn't get consumed in the app when the user purchases it. In order to query the user's in-app purchases, send a getPurchases() request, that will return all the current un-consumed products owned by the user.
If you find the premium content in this response, you know the user has purchased it and can grant them the premium interface.
Google Play Billing AIDL is now deprecated and will be removed in a future release. To implement Google Play Billing features, use the Google Play Billing library and to get purchases details for all the items bought within your app use: queryPurchases(skuType).
I have developed an android app which is paid, now i want to sell my app. I have few vendors who will sell for me, I want to validate which vendor sold how many. How can i do it through my app.
To help you start with, I think you need this official documentation for you to understand well the concept.
The In-app Billing API makes it easier for you to integrate In-app
Billing into your applications. The In-app Billing API supports a
synchronous purchase flow, APIs to let you easily track ownership of
consumable goods, and local caching of in-app purchase data.
To manage in-app products:
Managed in-app products are items that have their ownership
information tracked and managed by Google Play. When a user purchases
a managed in-app item, Google Play Stores the purchase information for
each item on a per-user basis. This enables you to later query Google
Play at any time to restore the state of the items a specific user has
purchased. This information is persistent on the Google Play servers
even if the user uninstalls the application or if they change devices.
If you are using the In-app Billing API, you can also consume managed
items within your application. You would typically implement
consumption for items that can be purchased multiple times (such as
in-game currency, fuel, or magic spells). Once purchased, a managed
item cannot be purchased again until you consume the item, by sending
a consumption request to Google Play. To learn more about in-app
product consumption, see Consuming Items.
I got my current app in test with some items to testpurchase. And I´ve done that now but I need to do further testing on those items. Is there a way to simply "restore" those purchases so that I dont get that error "You already own this item" ?
There is a way:
Once an in-app product is purchased, it is considered to be "owned".
In-app products in the "owned" state cannot be purchased from Google
Play. You must send a consumption request for the "owned" in-app
product before Google Play makes it available for purchase again.
Consuming the in-app product reverts it to the "unowned" state, and
discards the previous purchase data.
I have working app that sells in-app products (InApp billing v3).
Recently I've made an update for this app and made a terrible mistake there: I consumed some of purchases I didn't want to consume.
I issued an update and users updated the app and then wrote me they have no purchased access. (As I found later, I consumed wrong items).
So I have some questions now:
Is there a way to restore consumed purchases or I should return payments to my users?
Is there a way to find out how many and which purchases were consumed?
If returning payments, is there a way to find out if user still has the product or is it consumed with out changing the app (through google services)?
Thanks.
According to what I have understood from your question, It seems like you want to purchase product only once.
What I wished to ask: is there a way to request information about consumed products like about owned products.
you can get response or it's information in any type(Managed Product, Unmanaged Product, Subscription) in the onActivityResult method() check my below link.
In-app billing-v3 error in activity result
but I would not prefer you to manage it customly as you told for one time purchase product(not consumable product). You should go with the Manage product.
Managed In-app Products:
Managed in-app products are items that have their ownership
information tracked and managed by Google Play. When a user purchases
a managed in-app item, Google Play stores the purchase information for
each item on a per-user basis. This enables you to later query Google
Play at any time to restore the state of the items a specific user has
purchased. This information is persistent on the Google Play servers
even if the user uninstalls the application or if they change devices.
for more information about product type
you can query any time you want and you will get the product information, and even you don't need to manage if user has already purchase this product or not.
Is there a way to restore cnsumed purchases or I should return payments to my users?
Better option is you should give the payments back to the user and for the next time check the whole app once using dummy product "android.test.purchased" and update your app.
Is there a wat to find out how many and which purchases were consumed?
You have to check in the Google wallet because all transaction should be handle by the it, check if it gives you product type or not. Using your google developer console credential you can signed into google wallet.
If returning payments is there a way to find out if user stil has the product or is it consumed with out changing the app (through google services)?
as per above answer you have to check in google wallet, according to my knowledge they are provide us all of information about product type with user detail.
Let me know if I have not properly understood your question.
Hope it will solve your problem.
I am building an app that I want to use Google in app billing for. Does Google track in-app purchase history for me, so that I can query history and get data, say, by date or by item, etc. Or must my app itself store user's purchase history on my own backend? Also, if you can please provide a link so I can verify this info.
For your question answer is both YES and NO Google will take care of all purchases based on product type. If you are using Non-consumable or Subscription based products Google will keep records, in other case if you are using Consumable products Google will keep it's record till your app consumes that product.
If your app sends a purchase request Google will associate it with primary gmail account registered on android device and will not allow to purchase same product twice.
NOTE:- If You are using IAB-2 then above product type and flow will slightly different
Non-consumable ** is known as **Managed Products
*Subscription* is same as Subscription
*Consumable* is known as Unmanaged products
In case of IAB-2 google will never keep record of Unmanaged products and it is your responsibility to keep records if you want.
For more details see below link to developer guide.
Developer guide