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/c.java

@@ -0,0 +1,99 @@
+package D0;
+
+import C.w;
+import android.os.Parcel;
+import android.util.SparseIntArray;
+import s.e;
+import s.j;
+
+/* loaded from: classes.dex */
+public final class c extends b {
+
+    /* renamed from: d, reason: collision with root package name */
+    public final SparseIntArray f364d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public final Parcel f365e;
+
+    /* renamed from: f, reason: collision with root package name */
+    public final int f366f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public final int f367g;
+    public final String h;
+    public int i;
+
+    /* renamed from: j, reason: collision with root package name */
+    public int f368j;
+
+    /* renamed from: k, reason: collision with root package name */
+    public int f369k;
+
+    /* JADX WARN: Type inference failed for: r5v0, types: [s.e, s.j] */
+    /* JADX WARN: Type inference failed for: r6v0, types: [s.e, s.j] */
+    /* JADX WARN: Type inference failed for: r7v0, types: [s.e, s.j] */
+    public c(Parcel parcel) {
+        this(parcel, parcel.dataPosition(), parcel.dataSize(), "", new j(0), new j(0), new j(0));
+    }
+
+    @Override // D0.b
+    public final c a() {
+        Parcel parcel = this.f365e;
+        int dataPosition = parcel.dataPosition();
+        int i = this.f368j;
+        if (i == this.f366f) {
+            i = this.f367g;
+        }
+        return new c(parcel, dataPosition, i, w.r(new StringBuilder(), this.h, "  "), this.f361a, this.f362b, this.f363c);
+    }
+
+    @Override // D0.b
+    public final boolean e(int i) {
+        while (this.f368j < this.f367g) {
+            int i4 = this.f369k;
+            if (i4 == i) {
+                return true;
+            }
+            if (String.valueOf(i4).compareTo(String.valueOf(i)) > 0) {
+                return false;
+            }
+            int i5 = this.f368j;
+            Parcel parcel = this.f365e;
+            parcel.setDataPosition(i5);
+            int readInt = parcel.readInt();
+            this.f369k = parcel.readInt();
+            this.f368j += readInt;
+        }
+        return this.f369k == i;
+    }
+
+    @Override // D0.b
+    public final void h(int i) {
+        int i4 = this.i;
+        SparseIntArray sparseIntArray = this.f364d;
+        Parcel parcel = this.f365e;
+        if (i4 >= 0) {
+            int i5 = sparseIntArray.get(i4);
+            int dataPosition = parcel.dataPosition();
+            parcel.setDataPosition(i5);
+            parcel.writeInt(dataPosition - i5);
+            parcel.setDataPosition(dataPosition);
+        }
+        this.i = i;
+        sparseIntArray.put(i, parcel.dataPosition());
+        parcel.writeInt(0);
+        parcel.writeInt(i);
+    }
+
+    public c(Parcel parcel, int i, int i4, String str, e eVar, e eVar2, e eVar3) {
+        super(eVar, eVar2, eVar3);
+        this.f364d = new SparseIntArray();
+        this.i = -1;
+        this.f369k = -1;
+        this.f365e = parcel;
+        this.f366f = i;
+        this.f367g = i4;
+        this.f368j = i;
+        this.h = str;
+    }
+}