Determining which version of Storekit we are using in an app

Hi all We are working on an app that we bought and are looking at which version of StoreKit it uses.

Is there any guidance or methods we can use to quickly determine which version of StoreKit is being used.

Its either Storekit v1 or Storekit v2 but its not clear and we aren't able to get features working correctly.

Determining which version of Storekit we are using in an app
 
 
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