Just pasting this here so we can close the question.

You get this error java.lang.AbstractMethodError: abstract method "void com.google.android.gms.tasks.OnSuccessListener.onSuccess(java.lang.Object)" whenever your google play services packages is not compatible with the library you are trying to add.

So you would either have to change the version of your Google Play Services packages, or change the version of your AAR library file.

I am trying to add Razor Pay to my Xamarin Form App, Though there is no direct way I created a binding Library from aar file.
as per Razor Pay document I added few line of code which is sufficient to work with test account but I am facing an Error which I am not sure how to solve it

Here is the Exception which is thrown

 com.google.android.gms.tasks.OnSuccessListener.onSuccess(java.lang.Object)

here is my call stack

07-12 21:36:07.276 D/com.razorpay.checkout( 9046): java.lang.AbstractMethodError: abstract method 
"void com.google.android.gms.tasks.OnSuccessListener.onSuccess(java.lang.Object)"
   07-12 21:36:07.276 D/com.razorpay.checkout( 9046):   at 
 com.google.android.gms.tasks.zzn.run(Unknown Source:4)
 07-12 21:36:07.276 D/com.razorpay.checkout( 9046):     at 
 android.os.Handler.handleCallback(Handler.java:873)
 07-12 21:36:07.276 D/com.razorpay.checkout( 9046):     at 
 android.os.Handler.dispatchMessage(Handler.java:99)

Here is my Code which i have implemented

public class MainActivity : global::Xamarin.Forms.Platform.Android.FormsAppCompatActivity, IPaymentResultWithDataListener, IOnSuccessListener, IOnFailureListener
{
    public App app;

    protected override void OnCreate(Bundle savedInstanceState)
    {
        TabLayoutResource = Resource.Layout.Tabbar;
        ToolbarResource = Resource.Layout.Toolbar;

        base.OnCreate(savedInstanceState);
        Checkout.Preload(this);
        Checkout checkOut = new Checkout();
        checkOut.SetKeyID("MyAPIKEY");
        Forms.SetFlags("IndicatorView_Experimental");
        Xamarin.Essentials.Platform.Init(this, savedInstanceState);
        global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
        CachedImageRenderer.Init(true);
        Window.SetStatusBarColor(Android.Graphics.Color.Rgb(13, 141, 190));
        app = new App();
        LoadApplication(app);

        if (IsPlayServiceAvailable() == false)
        {
            throw new System.Exception("This device does not have Google Play Services and cannot receive push notifications.");
        }
        CreateNotificationChannel();
        LoginWithSocialIconViewModel.AuthenticateAction += OAuthGoogle;
        Window.SetSoftInputMode(Android.Views.SoftInput.AdjustResize);

        Activity activity = this;
        JSONObject options = new JSONObject();
        options.Put("description", "My Sample Payment activity");
        options.Put("order_id", "order_EAMgUyLXrMfbmL");
        options.Put("currency", "INR");
        options.Put("amount", "100");
        checkOut.Open(activity, options);
    }

Can someone figure it out what m I missing