I`m using Flutter
And in this update, I`m going to upgrade to Billing Library version 3 as requested by Google.
but I do not know how to do this?
I never wrote the version in the first place.
I`m currently using "in_app_purchase" package
See its changelog.
0.5.0 they updated to Billing version 3. No need to do anything on your side, just to use latest version of this pub package.
Answered By – Matej Hlatky
Answer Checked By – Timothy Miller (FlutterFixes Admin)