Security

In-app purchase flow

In a mobile game, what does an in-app purchase go through from the user's tap to the item being granted on the server?

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With StoreKit 2 you look up the Product and call purchase(), the App Store takes the payment and returns a signed Transaction (JWS), the client sends it to the server, and only after the server verifies it and confirms the grant does the app call finish().

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In-app purchase flow

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