I have an auto-renewable subscription. I have two methods helping me keep track of when they are expired
@MainActor public func isPurchased(product: Product) async -> Bool {
guard let state = await product.currentEntitlement else {
return false
}
switch state {
case .unverified(_, _):
return false
case .verified(let transaction):
await transaction.finish()
return isTransactionRelevant(transaction)
}
}
private func isTransactionRelevant(_ transaction: Transaction) -> Bool {
if let revocationDate = transaction.revocationDate {
logger.error("Transaction verification failed: Transaction was revoked on \(revocationDate)")
return false
}
if let expirationDate = transaction.expirationDate,
expirationDate < Date()
{
logger.error("Transaction verification failed: Transaction expired on \(expirationDate)")
return false
}
if transaction.isUpgraded {
logger.error("Transaction verification failed: Transaction was upgraded")
return false
}
logger.info("Transaction verification succeeded")
return true
}
I also have this that I can call to get the latest state of purchases
@MainActor public func updateStoreKitSubscriptionStatus() async {
var currentProductsPurchased: [Product] = []
for await result in Transaction.currentEntitlements {
if case .verified(let transaction) = result {
if isTransactionRelevant(transaction) {
if let product = products.first(
where: { $0.id == transaction.productID
})
{
currentProductsPurchased.append(product)
}
}
await transaction.finish()
}
}
self.purchasedProducts = currentProductsPurchased
}
Right now when a subscription expires the user needs to manually do some action that triggers updateStoreKitSubscriptionStatus() as it appears that expirations do not come through in Transaction.updates.
I am surprised there does not seem to be a better way. Does StoreKit not notify you somewhere that an auto-renewable subscription has expired? Can you observe it in an ObservableObject? Or do I need to just frequently poll Transaction.currentEntitlements even if I dont expect frequent updates?
Topic:
App & System Services
SubTopic:
StoreKit