'Google Play Billing backend notifications about purchases

Google Play Billing allows get notifications about subscriptions that users make in the app. There is a doc describes how to use this feature https://developer.android.com/google/play/billing/realtime_developer_notifications

But the doc says only about subscription not about one time purchases that users make in the app within google play.

I can't find any information related with notifications about single purchases, not subscriptions. Is anyone know how is it possible to get notifications about purchases?

Solution 1:^[1]

They don't offer it. You will get email from Google Play for one-time purchase.

Solution 2:^[2]

I think that the Google documentation was updated. Because in this link that you shared, we can see that the information about one-time purchases (or product purchases) is on the OneTimePurchasing tag.
Also, we must pay attention to what the documentation says:

If this field is present, then this notification is related to a one-time 
purchase, and this field contains additional information related to the 
purchase. Note that this field is mutually exclusive with testNotification 
and subscriptionProductNotification.

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Source: Stack Overflow

Solution	Source
Solution 1	DrPower
Solution 2	claudius

'Google Play Billing backend notifications about purchases

Solution 1:[1]

Solution 2:[2]

Sources

Related Questions

Solution 1:^[1]

Solution 2:^[2]