What are error handling patterns for StoreKit 2 in Swift?

Error handling in StoreKit 2 is essential for ensuring a smooth user experience in your app. StoreKit 2 provides better APIs for managing in-app purchases and subscriptions, but it also requires developers to properly handle errors that might arise during these processes. Here are some common error handling patterns you can use:

1. Identifying Errors

StoreKit 2 uses the StoreKitError enumeration to categorize errors that can occur. You can use a switch statement to specifically handle known errors.

2. Retrying Transactions

If a transaction fails due to a temporary issue, such as a network error, you can implement a retry mechanism to attempt the transaction again after a short delay.

3. User Feedback

It’s crucial to inform users of what went wrong and suggest possible actions they can take, such as trying again later or checking their internet connection.

Example Error Handling

// Example of handling errors in StoreKit 2 import StoreKit func purchaseProduct(product: Product) { Task { do { let result = try await product.purchase() // Handle successful purchase } catch { handlePurchaseError(error) } } } func handlePurchaseError(_ error: Error) { if let storeKitError = error as? StoreKitError { switch storeKitError { case .paymentCancelled: print("User cancelled the payment.") case .productNotAvailable: print("Product is not available.") case .clientInvalid: print("Client is not valid.") default: print("An unknown error occurred: \(error.localizedDescription)") } } else { print("A non-StoreKit error occurred: \(error)") } }

Error handling StoreKit 2 Swift in-app purchases transaction errors

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