class StoreTransaction Abstract class that provides access to all of StoreKit’s product type’s properties.
func purchase(package: Package, completion: PurchaseCompletedBlock ) Initiates a purchase of a
Package.func purchase(product: StoreProduct ) async throws -> PurchaseResultData Initiates a purchase of a
StoreProduct .func purchase(product: StoreProduct , completion: PurchaseCompletedBlock ) Initiates a purchase of a
StoreProduct .