Android Amazon In-App Billing - Verifying/Confirming Licences

Question

I have a fairly simply In-App Purchase setup - he user can buy a one-time licence to disable Ads and that's it, no subscriptions, no consumables - just a one-off licence they keep forever.

Obvious I want that to be forever INCLUDING after an uninstall/reinstall - and the latest Google Billing (v3) has the ability to check for the existence of the licence on startup and thus refresh the licence after an uninstall (and indeed, cancel it after a refund) but Amazon does not appear to support any re-querying of the status of a purchase!?

The only way I can find is to redo the purchase - at which point it will say "Oh, you've already bought this" and I can pick that up and give them the license back - but it's not automatic, they have to 'buy' it again to find out they own it and it would never know about refunds...

Anyone worked with the Amazon Billing API enough to understand whether this is possible? The documentation is - frankly - poor (and often out-of-date), the forums are ghost-towns and when they do reply, it tends to be unhelpful - and their own example is woefully basic and does nothing like this at all...

Answer 1

According to this website, https://developer.amazon.com/sdk/in-app-purchasing/documentation/developer-guide.html, it seems like that you have to call initiatePurchaseUpdatesRequest, and onPurchaseUpdatesResponse(PurchaseUpdatesResponse purchaseUpdatesResponse) will in turn be called. the information in purchaseupdatesresponse should have what you need