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/r3/C0575g.java

@@ -0,0 +1,102 @@
+package r3;
+
+import java.io.IOException;
+import java.io.InputStream;
+import kotlin.UByte;
+import kotlin.jvm.internal.Intrinsics;
+
+/* renamed from: r3.g, reason: case insensitive filesystem */
+/* loaded from: classes3.dex */
+public final class C0575g extends InputStream {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final /* synthetic */ int f8281a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final /* synthetic */ InterfaceC0578j f8282b;
+
+    public /* synthetic */ C0575g(InterfaceC0578j interfaceC0578j, int i) {
+        this.f8281a = i;
+        this.f8282b = interfaceC0578j;
+    }
+
+    private final void d() {
+    }
+
+    @Override // java.io.InputStream
+    public final int available() {
+        switch (this.f8281a) {
+            case 0:
+                return (int) Math.min(((C0576h) this.f8282b).f8284b, Integer.MAX_VALUE);
+            default:
+                C c4 = (C) this.f8282b;
+                if (c4.f8247c) {
+                    throw new IOException("closed");
+                }
+                return (int) Math.min(c4.f8246b.f8284b, Integer.MAX_VALUE);
+        }
+    }
+
+    @Override // java.io.InputStream, java.io.Closeable, java.lang.AutoCloseable
+    public final void close() {
+        switch (this.f8281a) {
+            case 0:
+                return;
+            default:
+                ((C) this.f8282b).close();
+                return;
+        }
+    }
+
+    @Override // java.io.InputStream
+    public final int read() {
+        switch (this.f8281a) {
+            case 0:
+                C0576h c0576h = (C0576h) this.f8282b;
+                if (c0576h.f8284b > 0) {
+                    return c0576h.readByte() & UByte.MAX_VALUE;
+                }
+                return -1;
+            default:
+                C c4 = (C) this.f8282b;
+                if (!c4.f8247c) {
+                    C0576h c0576h2 = c4.f8246b;
+                    if (c0576h2.f8284b == 0 && c4.f8245a.read(c0576h2, 8192L) == -1) {
+                        return -1;
+                    }
+                    return c0576h2.readByte() & UByte.MAX_VALUE;
+                }
+                throw new IOException("closed");
+        }
+    }
+
+    public final String toString() {
+        switch (this.f8281a) {
+            case 0:
+                return ((C0576h) this.f8282b) + ".inputStream()";
+            default:
+                return ((C) this.f8282b) + ".inputStream()";
+        }
+    }
+
+    @Override // java.io.InputStream
+    public final int read(byte[] sink, int i, int i4) {
+        switch (this.f8281a) {
+            case 0:
+                Intrinsics.checkNotNullParameter(sink, "sink");
+                return ((C0576h) this.f8282b).a0(sink, i, i4);
+            default:
+                Intrinsics.checkNotNullParameter(sink, "data");
+                C c4 = (C) this.f8282b;
+                if (!c4.f8247c) {
+                    m3.d.j(sink.length, i, i4);
+                    C0576h c0576h = c4.f8246b;
+                    if (c0576h.f8284b == 0 && c4.f8245a.read(c0576h, 8192L) == -1) {
+                        return -1;
+                    }
+                    return c0576h.a0(sink, i, i4);
+                }
+                throw new IOException("closed");
+        }
+    }
+}