anti cheat for karma

using UnityEngine;
using System.Collections;

public class SignatureCheck : MonoBehaviour
{
    void Start()
    {
        if (!IsCorrect())
        {
            foreach (Camera camera in GameObject.FindObjectsOfType<Camera>())
            {
                Destroy(camera.gameObject);
            }
        }
    }

    public static bool IsCorrect()
    {
        #if UNITY_EDITOR
            return true;
        #elif UNITY_ANDROID
            AndroidJavaClass player = new AndroidJavaClass("com.unity3d.player.UnityPlayer");
            AndroidJavaObject activity = player.GetStatic<AndroidJavaObject>("currentActivity");
            AndroidJavaObject packageManager = activity.Call<AndroidJavaObject>("getPackageManager");

            string packageName = activity.Call<string>("getPackageName");

            int GET_SIGNATURES = packageManager.GetStatic<int>("GET_SIGNATURES");
            AndroidJavaObject packageInfo = packageManager.Call<AndroidJavaObject>("getPackageInfo", packageName, GET_SIGNATURES);
            AndroidJavaObject[] signatures = packageInfo.Get<AndroidJavaObject[]>("signatures");

            if (signatures != null && signatures.Length > 0)
            {
                int hashCode = signatures[0].Call<int>("hashCode");
                Debug.Log(hashCode);
                int expectedHashCode = -1835770393;
                return hashCode.Equals(expectedHashCode);
            }
            return false;
        #else
            return true;
        #endif
    }
}