Any in-app purchase system tutorial for android?

Any one knows any tutorial video or doc about the in-game/app purchase system?
Thank you

FilipeTessaro,

If you’d like to learn more about in-app purchases for Android, please download Unreal Match 3 and start poking around within the blueprints. This application was made to teach everyone about in-app purchases and various other features within the Editor. Here is a [blog post for Unreal Match 3][1].

Thanks!

https://www.unrealengine.com/blog/unreal-match-3-a-postmortem