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/b.java

@@ -0,0 +1,43 @@
+package com.google.firebase.concurrent;
+
+import com.google.firebase.concurrent.DelegatingScheduledFuture;
+import java.util.concurrent.Callable;
+import java.util.concurrent.ScheduledFuture;
+import java.util.concurrent.TimeUnit;
+
+/* loaded from: classes3.dex */
+public final /* synthetic */ class b implements DelegatingScheduledFuture.Resolver {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final /* synthetic */ int f5939a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final /* synthetic */ DelegatingScheduledExecutorService f5940b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final /* synthetic */ long f5941c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public final /* synthetic */ TimeUnit f5942d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public final /* synthetic */ Object f5943e;
+
+    public /* synthetic */ b(DelegatingScheduledExecutorService delegatingScheduledExecutorService, Object obj, long j4, TimeUnit timeUnit, int i) {
+        this.f5939a = i;
+        this.f5940b = delegatingScheduledExecutorService;
+        this.f5943e = obj;
+        this.f5941c = j4;
+        this.f5942d = timeUnit;
+    }
+
+    @Override // com.google.firebase.concurrent.DelegatingScheduledFuture.Resolver
+    public final ScheduledFuture addCompleter(DelegatingScheduledFuture.Completer completer) {
+        switch (this.f5939a) {
+            case 0:
+                return DelegatingScheduledExecutorService.l(this.f5940b, (Runnable) this.f5943e, this.f5941c, this.f5942d, completer);
+            default:
+                return DelegatingScheduledExecutorService.a(this.f5940b, (Callable) this.f5943e, this.f5941c, this.f5942d, completer);
+        }
+    }
+}