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I implemented Inapp purchases using Play Billing Library. I am storing the Purchase Object in Firebase Firestore.

https://developer.android.com/reference/com/android/billingclient/api/Purchase.html

in debug build, the works fine. But release build, the app throws "No properties to serialize found on class com.android.billingclient.api.h"

I know, it due to proguard. what rule should i add?

or there any alternative solution?

muthukrishnan
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