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/provider/FirebaseInitProvider.java

@@ -0,0 +1,84 @@
+package com.google.firebase.provider;
+
+import android.content.ContentProvider;
+import android.content.ContentValues;
+import android.content.Context;
+import android.content.pm.ProviderInfo;
+import android.database.Cursor;
+import android.net.Uri;
+import android.util.Log;
+import com.google.android.gms.common.internal.Preconditions;
+import com.google.firebase.FirebaseApp;
+import com.google.firebase.StartupTime;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/* loaded from: classes3.dex */
+public class FirebaseInitProvider extends ContentProvider {
+    static final String EMPTY_APPLICATION_ID_PROVIDER_AUTHORITY = "com.google.firebase.firebaseinitprovider";
+    private static final String TAG = "FirebaseInitProvider";
+    private static StartupTime startupTime = StartupTime.now();
+    private static AtomicBoolean currentlyInitializing = new AtomicBoolean(false);
+
+    private static void checkContentProviderAuthority(ProviderInfo providerInfo) {
+        Preconditions.checkNotNull(providerInfo, "FirebaseInitProvider ProviderInfo cannot be null.");
+        if (EMPTY_APPLICATION_ID_PROVIDER_AUTHORITY.equals(providerInfo.authority)) {
+            throw new IllegalStateException("Incorrect provider authority in manifest. Most likely due to a missing applicationId variable in application's build.gradle.");
+        }
+    }
+
+    public static StartupTime getStartupTime() {
+        return startupTime;
+    }
+
+    public static boolean isCurrentlyInitializing() {
+        return currentlyInitializing.get();
+    }
+
+    @Override // android.content.ContentProvider
+    public void attachInfo(Context context, ProviderInfo providerInfo) {
+        checkContentProviderAuthority(providerInfo);
+        super.attachInfo(context, providerInfo);
+    }
+
+    @Override // android.content.ContentProvider
+    public int delete(Uri uri, String str, String[] strArr) {
+        return 0;
+    }
+
+    @Override // android.content.ContentProvider
+    public String getType(Uri uri) {
+        return null;
+    }
+
+    @Override // android.content.ContentProvider
+    public Uri insert(Uri uri, ContentValues contentValues) {
+        return null;
+    }
+
+    @Override // android.content.ContentProvider
+    public boolean onCreate() {
+        try {
+            currentlyInitializing.set(true);
+            if (FirebaseApp.initializeApp(getContext()) == null) {
+                Log.i(TAG, "FirebaseApp initialization unsuccessful");
+            } else {
+                Log.i(TAG, "FirebaseApp initialization successful");
+            }
+            currentlyInitializing.set(false);
+            return false;
+        } catch (Throwable th) {
+            currentlyInitializing.set(false);
+            throw th;
+        }
+    }
+
+    @Override // android.content.ContentProvider
+    public Cursor query(Uri uri, String[] strArr, String str, String[] strArr2, String str2) {
+        return null;
+    }
+
+    @Override // android.content.ContentProvider
+    public int update(Uri uri, ContentValues contentValues, String str, String[] strArr) {
+        return 0;
+    }
+}