Primer paso de la investigacion. Se aportan el .apk, las carpetas con el apk extraido y el apk descompilado. El archivo API_DOCUMENTATION.md es un archivo donde se anotaran los descubrimientos del funcionamiento de la API, y los .py son scripts para probar la funcionalidad de la API con los métodos que vayamos encontrando. Finalmente, los archivos .js son scripts de Frida para extraer informacion de la APP durante la ejecucion.

apk_decompiled/sources/com/google/firebase/messaging/FcmLifecycleCallbacks.java

@@ -0,0 +1,72 @@
+package com.google.firebase.messaging;
+
+import android.annotation.SuppressLint;
+import android.app.Activity;
+import android.app.Application;
+import android.content.Intent;
+import android.os.Bundle;
+import android.util.Log;
+import com.google.firebase.messaging.Constants;
+import java.util.Collections;
+import java.util.Set;
+import java.util.WeakHashMap;
+
+/* JADX INFO: Access modifiers changed from: package-private */
+/* loaded from: classes3.dex */
+public class FcmLifecycleCallbacks implements Application.ActivityLifecycleCallbacks {
+    private final Set<Intent> seenIntents = Collections.newSetFromMap(new WeakHashMap());
+
+    /* JADX INFO: Access modifiers changed from: private */
+    /* renamed from: logNotificationOpen, reason: merged with bridge method [inline-methods] */
+    public void lambda$onActivityCreated$0(Intent intent) {
+        Bundle bundle = null;
+        try {
+            Bundle extras = intent.getExtras();
+            if (extras != null) {
+                bundle = extras.getBundle(Constants.MessageNotificationKeys.ANALYTICS_DATA);
+            }
+        } catch (RuntimeException e4) {
+            Log.w(Constants.TAG, "Failed trying to get analytics data from Intent extras.", e4);
+        }
+        if (MessagingAnalytics.shouldUploadScionMetrics(bundle)) {
+            MessagingAnalytics.logNotificationOpen(bundle);
+        }
+    }
+
+    @Override // android.app.Application.ActivityLifecycleCallbacks
+    @SuppressLint({"ThreadPoolCreation"})
+    public void onActivityCreated(Activity activity, Bundle bundle) {
+        Intent intent = activity.getIntent();
+        if (intent == null || !this.seenIntents.add(intent)) {
+            return;
+        }
+        lambda$onActivityCreated$0(intent);
+    }
+
+    @Override // android.app.Application.ActivityLifecycleCallbacks
+    public void onActivityDestroyed(Activity activity) {
+    }
+
+    @Override // android.app.Application.ActivityLifecycleCallbacks
+    public void onActivityPaused(Activity activity) {
+        if (activity.isFinishing()) {
+            this.seenIntents.remove(activity.getIntent());
+        }
+    }
+
+    @Override // android.app.Application.ActivityLifecycleCallbacks
+    public void onActivityResumed(Activity activity) {
+    }
+
+    @Override // android.app.Application.ActivityLifecycleCallbacks
+    public void onActivitySaveInstanceState(Activity activity, Bundle bundle) {
+    }
+
+    @Override // android.app.Application.ActivityLifecycleCallbacks
+    public void onActivityStarted(Activity activity) {
+    }
+
+    @Override // android.app.Application.ActivityLifecycleCallbacks
+    public void onActivityStopped(Activity activity) {
+    }
+}