How to determine used Google Play Billing Library version?

[cervebar]

We are using version 11.0.4, but are not sure if we match Android criteria to have billing library in version 5 (Google Play Billing Library version deprecation). I looked in release notes and overall repo, but I don't know how to determine which version of Android library our version 11.0.4 is using. Where can I find this information?
Many thanks

[cervebar]

Ok, I found a way. Go to node_modules -> react-native-iap -> android -> build.gradle,
then search for com.android.billingclient and it should be in dependencies section.