startObservingTransactionQueue method

Future startObservingTransactionQueue()

Instructs the iOS implementation to register a transaction observer and start listening to it.

Call this method when the first listener is subscribed to the InAppPurchaseIosPlatform.purchaseStream.

Implementation

Future startObservingTransactionQueue() => channel
    .invokeMethod<void>('-[SKPaymentQueue startObservingTransactionQueue]');