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/Z2/x.java

@@ -0,0 +1,101 @@
+package Z2;
+
+import java.io.Closeable;
+import java.io.Flushable;
+import java.util.Arrays;
+
+/* loaded from: classes3.dex */
+public abstract class x implements Closeable, Flushable {
+
+    /* renamed from: e, reason: collision with root package name */
+    public String f2308e;
+
+    /* renamed from: f, reason: collision with root package name */
+    public boolean f2309f;
+
+    /* renamed from: g, reason: collision with root package name */
+    public boolean f2310g;
+    public boolean h;
+
+    /* renamed from: a, reason: collision with root package name */
+    public int f2304a = 0;
+
+    /* renamed from: b, reason: collision with root package name */
+    public int[] f2305b = new int[32];
+
+    /* renamed from: c, reason: collision with root package name */
+    public String[] f2306c = new String[32];
+
+    /* renamed from: d, reason: collision with root package name */
+    public int[] f2307d = new int[32];
+    public int i = -1;
+
+    public abstract x O();
+
+    public final String Y() {
+        return L.c(this.f2304a, this.f2305b, this.f2306c, this.f2307d);
+    }
+
+    public abstract x Z(String str);
+
+    public abstract x a0();
+
+    public final int b0() {
+        int i = this.f2304a;
+        if (i != 0) {
+            return this.f2305b[i - 1];
+        }
+        throw new IllegalStateException("JsonWriter is closed.");
+    }
+
+    public final void c0(int i) {
+        int[] iArr = this.f2305b;
+        int i4 = this.f2304a;
+        this.f2304a = i4 + 1;
+        iArr[i4] = i;
+    }
+
+    public abstract x d();
+
+    public void d0(String str) {
+        if (str.isEmpty()) {
+            str = null;
+        }
+        this.f2308e = str;
+    }
+
+    public abstract x e();
+
+    public abstract x e0(double d4);
+
+    public abstract x f0(long j4);
+
+    public abstract x g0(Float f2);
+
+    public abstract x h0(String str);
+
+    public abstract x i0(boolean z3);
+
+    public final void s() {
+        int i = this.f2304a;
+        int[] iArr = this.f2305b;
+        if (i != iArr.length) {
+            return;
+        }
+        if (i == 256) {
+            throw new RuntimeException("Nesting too deep at " + Y() + ": circular reference?");
+        }
+        this.f2305b = Arrays.copyOf(iArr, iArr.length * 2);
+        String[] strArr = this.f2306c;
+        this.f2306c = (String[]) Arrays.copyOf(strArr, strArr.length * 2);
+        int[] iArr2 = this.f2307d;
+        this.f2307d = Arrays.copyOf(iArr2, iArr2.length * 2);
+        if (this instanceof w) {
+            w wVar = (w) this;
+            Object[] objArr = wVar.f2302j;
+            wVar.f2302j = Arrays.copyOf(objArr, objArr.length * 2);
+        }
+    }
+
+    public abstract x x();
+}