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/d0/o.java

@@ -0,0 +1,109 @@
+package d0;
+
+import C.w;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Handler;
+import java.util.concurrent.LinkedBlockingDeque;
+import java.util.concurrent.ThreadPoolExecutor;
+import java.util.concurrent.TimeUnit;
+
+/* loaded from: classes.dex */
+public final class o implements g {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final Context f6140a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final I0.b f6141b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public final E2.e f6142c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public final Object f6143d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public Handler f6144e;
+
+    /* renamed from: f, reason: collision with root package name */
+    public ThreadPoolExecutor f6145f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public ThreadPoolExecutor f6146g;
+    public m3.l h;
+
+    public o(Context context, I0.b bVar) {
+        E2.e eVar = p.f6147d;
+        this.f6143d = new Object();
+        m3.d.i(context, "Context cannot be null");
+        this.f6140a = context.getApplicationContext();
+        this.f6141b = bVar;
+        this.f6142c = eVar;
+    }
+
+    @Override // d0.g
+    public final void a(m3.l lVar) {
+        synchronized (this.f6143d) {
+            this.h = lVar;
+        }
+        synchronized (this.f6143d) {
+            try {
+                if (this.h == null) {
+                    return;
+                }
+                if (this.f6145f == null) {
+                    ThreadPoolExecutor threadPoolExecutor = new ThreadPoolExecutor(0, 1, 15L, TimeUnit.SECONDS, new LinkedBlockingDeque(), new ThreadFactoryC0303a("emojiCompat"));
+                    threadPoolExecutor.allowCoreThreadTimeOut(true);
+                    this.f6146g = threadPoolExecutor;
+                    this.f6145f = threadPoolExecutor;
+                }
+                this.f6145f.execute(new F2.f(this, 10));
+            } catch (Throwable th) {
+                throw th;
+            }
+        }
+    }
+
+    public final void b() {
+        synchronized (this.f6143d) {
+            try {
+                this.h = null;
+                Handler handler = this.f6144e;
+                if (handler != null) {
+                    handler.removeCallbacks(null);
+                }
+                this.f6144e = null;
+                ThreadPoolExecutor threadPoolExecutor = this.f6146g;
+                if (threadPoolExecutor != null) {
+                    threadPoolExecutor.shutdown();
+                }
+                this.f6145f = null;
+                this.f6146g = null;
+            } catch (Throwable th) {
+                throw th;
+            }
+        }
+    }
+
+    public final L.i c() {
+        try {
+            E2.e eVar = this.f6142c;
+            Context context = this.f6140a;
+            I0.b bVar = this.f6141b;
+            eVar.getClass();
+            L.h a2 = L.c.a(context, bVar);
+            int i = a2.f1036a;
+            if (i != 0) {
+                throw new RuntimeException(w.i(i, "fetchFonts failed (", ")"));
+            }
+            L.i[] iVarArr = (L.i[]) a2.f1037b;
+            if (iVarArr == null || iVarArr.length == 0) {
+                throw new RuntimeException("fetchFonts failed (empty result)");
+            }
+            return iVarArr[0];
+        } catch (PackageManager.NameNotFoundException e4) {
+            throw new RuntimeException("provider not found", e4);
+        }
+    }
+}