What do I need to do once I request IAP (in-app purchase)?

Question

I have implemented requesting an IAP using this plugin: https://pub.dev/packages/flutter_inapp_purchase I basically copied their example file and adapted to my project. When testing with Sandbox testers or when testing on Android, everything seems to be working correctly.

Except for this bug: https://github.com/dooboolab/flutter_inapp_purchase/issues/318 which I now am thinking may be because I only requestPurchase when purchasing IAP — nothing else. I read in the docs that there are other methods that we could use, such as: finishTransaction or validateReceipt .

Is any of those after purchase methods required or at least recommended? If recommended, can someone explain why it'd be a good idea to implement? Could it be I experience the bug due to no implementing any of the after purchase methods ( finishTransaction / validateReceipt )?

In the docs says I shall validate the purchase on my back end. I don't understand why I should do it. Why is it even necessary?

Answer 1

You can follow this medium blog to implement subscription :

https://medium.com/bosc-tech-labs-private-limited/how-to-implement-subscriptions-in-app-purchase-in-flutter-7ce8906e608a