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POXamarin SKPaymentQueue AddPayment throwing exception
 

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  1. POXamarin SKPaymentQueue AddPayment throwing exception
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    <p>In my Xamarin app when I call this method</p> <pre><code>private void MakePayment (SKProduct product) { SKPayment payment = SKPayment.PaymentWithProduct (product); SKPaymentQueue.DefaultQueue.AddPayment (payment); } </code></pre> <p>I get this error:</p> <blockquote> <p>Failed to marshal the Objective-C object 0x14607110 (type: SKPaymentTransaction). Could not find an existing managed instance for this object, nor was it possible to create a new managed instance (because the type 'MonoTouch.StoreKit.SKPaymentTransaction[]' does not have a constructor that takes one IntPtr argument).</p> </blockquote> <p>I'm not sure if I have something configured wrong or there is an issue in my code or Xamarin.</p> <p>Here's the code for the Observer</p> <pre><code>internal class CustomPaymentObserver : SKPaymentTransactionObserver { private InAppPurchase inAppPurchase; public CustomPaymentObserver (InAppPurchase inAppPurchase) { this.inAppPurchase = inAppPurchase; } public override void UpdatedTransactions (SKPaymentQueue queue, SKPaymentTransaction[] transactions) { Console.WriteLine ("UpdatedTransactions"); foreach (SKPaymentTransaction transaction in transactions) { switch (transaction.TransactionState) { case SKPaymentTransactionState.Purchased: inAppPurchase.CompleteTransaction (transaction); break; case SKPaymentTransactionState.Failed: inAppPurchase.FailedTransaction (transaction); break; default: break; } } } public override void PaymentQueueRestoreCompletedTransactionsFinished (SKPaymentQueue queue) { } public override void RestoreCompletedTransactionsFailedWithError (SKPaymentQueue queue, NSError error) { } } </code></pre> <p>Here is the full stack trace:</p> <pre><code>System.Exception: Failed to marshal the Objective-C object 0x17ecb680 (type: SKPaymentTransaction). Could not find an existing managed instance for this object, nor was it possible to create a new managed instance (because the type 'MonoTouch.StoreKit.SKPaymentTransaction[]' does not have a constructor that takes one IntPtr argument). at MonoTouch.ObjCRuntime.Runtime.MissingCtor (IntPtr ptr, IntPtr klass, System.Type type, MissingCtorResolution resolution) [0x00046] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/.pp-Runtime.cs:352 at MonoTouch.ObjCRuntime.Runtime.ConstructNSObject[NSObject] (IntPtr ptr, System.Type type, MissingCtorResolution missingCtorResolution) [0x00000] in :0 at MonoTouch.ObjCRuntime.Runtime.GetNSObject (IntPtr ptr, System.Type target_type, MissingCtorResolution missingCtorResolution, System.Boolean&amp; created) [0x00073] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/.pp-Runtime.cs:514 at MonoTouch.ObjCRuntime.Runtime.GetNSObjectWrapped (IntPtr ptr, IntPtr type_ptr, System.Boolean&amp; created) [0x0000c] in /Developer/MonoTouch/Source/monotouch/src/ObjCRuntime/.pp-Runtime.cs:686 at at (wrapper native-to-managed) MonoTouch.ObjCRuntime.Runtime:GetNSObjectWrapped (intptr,intptr,int&amp;) at at (wrapper managed-to-native) MonoTouch.ObjCRuntime.Messaging:void_objc_msgSend_IntPtr (intptr,intptr,intptr) at MonoTouch.StoreKit.SKPaymentQueue.AddPayment (MonoTouch.StoreKit.SKPayment payment) [0x00014] in /Developer/MonoTouch/Source/monotouch/src/StoreKit/.pp-SKPaymentQueue.g.cs:109 at IOS.Util.IAP.InAppPurchase.ReceivedResponse (MonoTouch.StoreKit.SKProductsRequest request, MonoTouch.StoreKit.SKProductsResponse response) [0x0001d] in /Users/aaron/Projects/budget-ease-xamarin/IOS/Util/IAP/InAppPurchase.cs:43 at at (wrapper managed-to-native) MonoTouch.UIKit.UIApplication:UIApplicationMain (int,string[],intptr,intptr) at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/.pp-UIApplication.cs:38 at IOS.Application.Main (System.String[] args) [0x00008] in /Users/aaron/Projects/budget-ease-xamarin/IOS/Main.cs:16 </code></pre>
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    1. USAaron
    1. USAaron
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      1. VTUpMod
    1. COAn `SKPaymentTransaction[]` is used in the `UpdatedTransactions` method of `SKPaymentTransactionObserver`, can you post your code for the observer?
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      1. USjonathanpeppers
    2. COI added the observer code and the full stack trace. It doesn't seem to be getting to the observer, though.
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      1. USAaron
    3. COIt appears this is related to the Linker behavior on the project. I changed it do Don't Link and now I don't get this error. Should I have it on Don't Link?
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      1. POXamarin SKPaymentQueue AddPayment throwing exception
      1. USAaron
 

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