/// <summary>
/// Initializes the Payment Observer and adds it to the Payment Queue
/// </summary>
public Task StartAsync()
{
// Make sure we don't get initialized twice
if (_paymentObserver != null)
{
throw new InAppPurchaseException(PurchaseError.DeveloperError, "PaymentObserver has been already created");
}
_paymentObserver = new PaymentObserver();
// Start Observing the Payment Queue
SKPaymentQueue.DefaultQueue.AddTransactionObserver(_paymentObserver);
return(Task.CompletedTask);
}
/// <summary>
/// Removes the Observer from the Payment Queue
/// </summary>
public Task StopAsync()
{
try
{
// Disconnect only if we were connected
if (_paymentObserver != null)
{
SKPaymentQueue.DefaultQueue.RemoveTransactionObserver(_paymentObserver);
_paymentObserver = null;
}
}
catch (Exception ex)
{
Debug.WriteLine($"Unable to RemoveTransactionObserver: {ex.Message}");
}
return(Task.CompletedTask);
}
