private void OnInAppRequest(string productId) { Debug.Log("In App Request for product Id: " + productId + " received"); //Then you should perfrom purchase for this product id, using this or another game billing plugin //Once the purchase is complete, you should call RecordInAppResolution with one of the constants defined in GADInAppResolution: GoogleMobileAd.RecordInAppResolution(GADInAppResolution.RESOLUTION_SUCCESS); }