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/WakeLockHolder.java

@@ -0,0 +1,108 @@
+package com.google.firebase.messaging;
+
+import android.annotation.SuppressLint;
+import android.content.ComponentName;
+import android.content.Context;
+import android.content.Intent;
+import com.google.android.gms.stats.WakeLock;
+import java.util.concurrent.TimeUnit;
+
+/* JADX INFO: Access modifiers changed from: package-private */
+/* loaded from: classes3.dex */
+public final class WakeLockHolder {
+    private static final String EXTRA_WAKEFUL_INTENT = "com.google.firebase.iid.WakeLockHolder.wakefulintent";
+    static final long WAKE_LOCK_ACQUIRE_TIMEOUT_MILLIS = TimeUnit.MINUTES.toMillis(1);
+    private static final Object syncObject = new Object();
+    private static WakeLock wakeLock;
+
+    public static void acquireWakeLock(Intent intent, long j4) {
+        synchronized (syncObject) {
+            try {
+                if (wakeLock != null) {
+                    setAsWakefulIntent(intent, true);
+                    wakeLock.acquire(j4);
+                }
+            } catch (Throwable th) {
+                throw th;
+            }
+        }
+    }
+
+    private static void checkAndInitWakeLock(Context context) {
+        if (wakeLock == null) {
+            WakeLock wakeLock2 = new WakeLock(context, 1, "wake:com.google.firebase.iid.WakeLockHolder");
+            wakeLock = wakeLock2;
+            wakeLock2.setReferenceCounted(true);
+        }
+    }
+
+    public static void completeWakefulIntent(Intent intent) {
+        synchronized (syncObject) {
+            try {
+                if (wakeLock != null && isWakefulIntent(intent)) {
+                    setAsWakefulIntent(intent, false);
+                    wakeLock.release();
+                }
+            } catch (Throwable th) {
+                throw th;
+            }
+        }
+    }
+
+    public static void initWakeLock(Context context) {
+        synchronized (syncObject) {
+            checkAndInitWakeLock(context);
+        }
+    }
+
+    public static boolean isWakefulIntent(Intent intent) {
+        return intent.getBooleanExtra(EXTRA_WAKEFUL_INTENT, false);
+    }
+
+    public static void reset() {
+        synchronized (syncObject) {
+            wakeLock = null;
+        }
+    }
+
+    @SuppressLint({"TaskMainThread"})
+    public static void sendWakefulServiceIntent(Context context, WithinAppServiceConnection withinAppServiceConnection, Intent intent) {
+        synchronized (syncObject) {
+            try {
+                checkAndInitWakeLock(context);
+                boolean isWakefulIntent = isWakefulIntent(intent);
+                setAsWakefulIntent(intent, true);
+                if (!isWakefulIntent) {
+                    wakeLock.acquire(WAKE_LOCK_ACQUIRE_TIMEOUT_MILLIS);
+                }
+                withinAppServiceConnection.sendIntent(intent).addOnCompleteListener(new p(intent, 0));
+            } catch (Throwable th) {
+                throw th;
+            }
+        }
+    }
+
+    private static void setAsWakefulIntent(Intent intent, boolean z3) {
+        intent.putExtra(EXTRA_WAKEFUL_INTENT, z3);
+    }
+
+    public static ComponentName startWakefulService(Context context, Intent intent) {
+        synchronized (syncObject) {
+            try {
+                checkAndInitWakeLock(context);
+                boolean isWakefulIntent = isWakefulIntent(intent);
+                setAsWakefulIntent(intent, true);
+                ComponentName startService = context.startService(intent);
+                if (startService == null) {
+                    return null;
+                }
+                if (!isWakefulIntent) {
+                    wakeLock.acquire(WAKE_LOCK_ACQUIRE_TIMEOUT_MILLIS);
+                }
+                return startService;
+            } catch (Throwable th) {
+                throw th;
+            }
+        }
+    }
+}