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/concurrent/FirebaseExecutors.java

@@ -0,0 +1,54 @@
+package com.google.firebase.concurrent;
+
+import java.util.concurrent.Executor;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.ScheduledExecutorService;
+
+/* loaded from: classes3.dex */
+public class FirebaseExecutors {
+
+    /* loaded from: classes3.dex */
+    public enum DirectExecutor implements Executor {
+        INSTANCE;
+
+        @Override // java.util.concurrent.Executor
+        public void execute(Runnable runnable) {
+            runnable.run();
+        }
+    }
+
+    private FirebaseExecutors() {
+    }
+
+    public static Executor directExecutor() {
+        return DirectExecutor.INSTANCE;
+    }
+
+    public static Executor newLimitedConcurrencyExecutor(Executor executor, int i) {
+        return new LimitedConcurrencyExecutor(executor, i);
+    }
+
+    public static ExecutorService newLimitedConcurrencyExecutorService(ExecutorService executorService, int i) {
+        return new LimitedConcurrencyExecutorService(executorService, i);
+    }
+
+    public static ScheduledExecutorService newLimitedConcurrencyScheduledExecutorService(ExecutorService executorService, int i) {
+        return new DelegatingScheduledExecutorService(newLimitedConcurrencyExecutorService(executorService, i), ExecutorsRegistrar.SCHEDULER.get());
+    }
+
+    public static PausableExecutor newPausableExecutor(Executor executor) {
+        return new PausableExecutorImpl(false, executor);
+    }
+
+    public static PausableExecutorService newPausableExecutorService(ExecutorService executorService) {
+        return new PausableExecutorServiceImpl(false, executorService);
+    }
+
+    public static PausableScheduledExecutorService newPausableScheduledExecutorService(ScheduledExecutorService scheduledExecutorService) {
+        return new PausableScheduledExecutorServiceImpl(newPausableExecutorService(scheduledExecutorService), ExecutorsRegistrar.SCHEDULER.get());
+    }
+
+    public static Executor newSequentialExecutor(Executor executor) {
+        return new SequentialExecutor(executor);
+    }
+}