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/e3/P.java

@@ -0,0 +1,63 @@
+package e3;
+
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.nio.charset.Charset;
+import kotlin.Unit;
+import kotlin.jvm.internal.Intrinsics;
+import r3.InterfaceC0578j;
+
+/* loaded from: classes3.dex */
+public final class P extends Reader {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final InterfaceC0578j f6303a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final Charset f6304b;
+
+    /* renamed from: c, reason: collision with root package name */
+    public boolean f6305c;
+
+    /* renamed from: d, reason: collision with root package name */
+    public InputStreamReader f6306d;
+
+    public P(InterfaceC0578j source, Charset charset) {
+        Intrinsics.checkNotNullParameter(source, "source");
+        Intrinsics.checkNotNullParameter(charset, "charset");
+        this.f6303a = source;
+        this.f6304b = charset;
+    }
+
+    @Override // java.io.Reader, java.io.Closeable, java.lang.AutoCloseable
+    public final void close() {
+        Unit unit;
+        this.f6305c = true;
+        InputStreamReader inputStreamReader = this.f6306d;
+        if (inputStreamReader != null) {
+            inputStreamReader.close();
+            unit = Unit.INSTANCE;
+        } else {
+            unit = null;
+        }
+        if (unit == null) {
+            this.f6303a.close();
+        }
+    }
+
+    @Override // java.io.Reader
+    public final int read(char[] cbuf, int i, int i4) {
+        Intrinsics.checkNotNullParameter(cbuf, "cbuf");
+        if (this.f6305c) {
+            throw new IOException("Stream closed");
+        }
+        InputStreamReader inputStreamReader = this.f6306d;
+        if (inputStreamReader == null) {
+            InterfaceC0578j interfaceC0578j = this.f6303a;
+            inputStreamReader = new InputStreamReader(interfaceC0578j.X(), f3.c.r(interfaceC0578j, this.f6304b));
+            this.f6306d = inputStreamReader;
+        }
+        return inputStreamReader.read(cbuf, i, i4);
+    }
+}