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@@ -477,6 +477,36 @@ SwiftyStoreKit.purchaseProduct(productId, atomically: true) { result in
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}
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```
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+### Subscription Groups
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+
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+From [Apple Docs - Offering Subscriptions](https://developer.apple.com/app-store/subscriptions/):
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+
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+> A subscription group is a set of in-app purchases that you can create to provide users with a range of content offerings, service levels, or durations to best meet their needs. Users can only buy one subscription within a subscription group at a time. If users would want to buy more that one type of subscription — for example, to subscribe to more than one channel in a streaming app — you can put these in-app purchases in different subscription groups.
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+
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+You can verify all subscriptions within the same group with the `verifySubscriptions` method:
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+
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+```swift
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+let appleValidator = AppleReceiptValidator(service: .production, sharedSecret: "your-shared-secret")
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+SwiftyStoreKit.verifyReceipt(using: appleValidator) { result in
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+ switch result {
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+ case .success(let receipt):
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+ let productIds = Set([ "com.musevisions.SwiftyStoreKit.Weekly",
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+ "com.musevisions.SwiftyStoreKit.Monthly",
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+ "com.musevisions.SwiftyStoreKit.Yearly" ])
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+ let purchaseResult = SwiftyStoreKit.verifySubscriptions(productIds: productIds, inReceipt: receipt)
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+ switch purchaseResult {
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+ case .purchased(let expiryDate, let items):
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+ print("\(productIds) are valid until \(expiryDate)\n\(items)\n")
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+ case .expired(let expiryDate, let items):
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+ print("\(productIds) are expired since \(expiryDate)\n\(items)\n")
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+ case .notPurchased:
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+ print("The user has never purchased \(productIds)")
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+ }
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+ case .error(let error):
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+ print("Receipt verification failed: \(error)")
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+ }
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+}
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+```
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## Notes
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The framework provides a simple block based API with robust error handling on top of the existing StoreKit framework. It does **NOT** persist in app purchases data locally. It is up to clients to do this with a storage solution of choice (i.e. NSUserDefaults, CoreData, Keychain).
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