[Kotlin] Android Google Play In App Billing 3.X to 4.X

Job ID: 31539667

Budget: $500 – $780 HKD

1. update my purchase helper to 4.X billing library
2. on my 3.x billing library version , when user buy same consumable item ,
consumeAsync callback will get some error
- 6 Server error, please try again
- 8 Item is not owned by the user
you need help me fix them
Related categories: Android Kotlin