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Is anyone doing this? I'm getting ready to start our coding for it and I thought of a weird potential issue.
Our game relies on an in-game currency that you purchase.
If a user makes purchase and I get the correct return codes I will then update their balance on our server.
Are there any good methods someone can share that will help me to handle a failed connection when updating their balance?

I know there is restoration of in app purchases for Android, but does that work for consumables? If so then how? I think if I get a receipt number or some sort of verification code I could store it locally and on the server and compare later, but I don't see where we get any unique data for the purchase.

I could also do it by product count, but that seems like it'd be open to tampering.
Thanks!