Where should I begin to add in app purchases

Hello there. At the moment I want to add an in app purchase button to remove ads as well as a restore purchases button. However I don't know where to begin. Could you provide me with a link to some information that provides me with a starting point please?

Thank you for your time.

Answered by jezekilj in 804677022
Where should I begin to add in app purchases
 
 
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