public void onApp(string app_id)
{
byte[][] user_addresses = new byte[][] { friend.walletAddress };
CustomAppPage custom_app_page = new CustomAppPage(app_id, IxianHandler.getWalletStorage().getPrimaryAddress(), user_addresses, Node.customAppManager.getAppEntryPoint(app_id));
custom_app_page.accepted = true;
Node.customAppManager.addAppPage(custom_app_page);
Xamarin.Forms.Device.BeginInvokeOnMainThread(() =>
{
Navigation.PushAsync(custom_app_page, Config.defaultXamarinAnimations);
});
StreamProcessor.sendAppRequest(friend, app_id, custom_app_page.sessionId);
}