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/k3/d.java

@@ -0,0 +1,72 @@
+package k3;
+
+import C.w;
+import i3.l;
+import i3.o;
+import java.net.ProtocolException;
+import java.util.concurrent.TimeUnit;
+import kotlin.jvm.internal.Intrinsics;
+import r3.C0576h;
+
+/* loaded from: classes3.dex */
+public final class d extends a {
+
+    /* renamed from: d, reason: collision with root package name */
+    public long f7107d;
+
+    /* renamed from: e, reason: collision with root package name */
+    public final /* synthetic */ o f7108e;
+
+    /* JADX WARN: 'super' call moved to the top of the method (can break code semantics) */
+    public d(o oVar, long j4) {
+        super(oVar);
+        this.f7108e = oVar;
+        this.f7107d = j4;
+        if (j4 == 0) {
+            d();
+        }
+    }
+
+    @Override // java.io.Closeable, java.lang.AutoCloseable
+    public final void close() {
+        if (this.f7098b) {
+            return;
+        }
+        if (this.f7107d != 0) {
+            TimeUnit timeUnit = TimeUnit.MILLISECONDS;
+            if (!f3.c.g(this)) {
+                ((l) this.f7108e.f6894c).k();
+                d();
+            }
+        }
+        this.f7098b = true;
+    }
+
+    @Override // k3.a, r3.I
+    public final long read(C0576h sink, long j4) {
+        Intrinsics.checkNotNullParameter(sink, "sink");
+        if (j4 < 0) {
+            throw new IllegalArgumentException(w.l("byteCount < 0: ", j4).toString());
+        }
+        if (this.f7098b) {
+            throw new IllegalStateException("closed");
+        }
+        long j5 = this.f7107d;
+        if (j5 == 0) {
+            return -1L;
+        }
+        long read = super.read(sink, Math.min(j5, j4));
+        if (read == -1) {
+            ((l) this.f7108e.f6894c).k();
+            ProtocolException protocolException = new ProtocolException("unexpected end of stream");
+            d();
+            throw protocolException;
+        }
+        long j6 = this.f7107d - read;
+        this.f7107d = j6;
+        if (j6 == 0) {
+            d();
+        }
+        return read;
+    }
+}