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/kotlin/comparisons/a.java

@@ -0,0 +1,39 @@
+package kotlin.comparisons;
+
+import java.util.Comparator;
+import kotlin.jvm.functions.Function1;
+
+/* loaded from: classes3.dex */
+public final /* synthetic */ class a implements Comparator {
+
+    /* renamed from: a, reason: collision with root package name */
+    public final /* synthetic */ int f7113a;
+
+    /* renamed from: b, reason: collision with root package name */
+    public final /* synthetic */ Object f7114b;
+
+    public /* synthetic */ a(Object obj, int i) {
+        this.f7113a = i;
+        this.f7114b = obj;
+    }
+
+    @Override // java.util.Comparator
+    public final int compare(Object obj, Object obj2) {
+        int nullsLast$lambda$4$ComparisonsKt__ComparisonsKt;
+        int nullsFirst$lambda$3$ComparisonsKt__ComparisonsKt;
+        int compareBy$lambda$0$ComparisonsKt__ComparisonsKt;
+        int i = this.f7113a;
+        Object obj3 = this.f7114b;
+        switch (i) {
+            case 0:
+                nullsLast$lambda$4$ComparisonsKt__ComparisonsKt = ComparisonsKt__ComparisonsKt.nullsLast$lambda$4$ComparisonsKt__ComparisonsKt((Comparator) obj3, obj, obj2);
+                return nullsLast$lambda$4$ComparisonsKt__ComparisonsKt;
+            case 1:
+                nullsFirst$lambda$3$ComparisonsKt__ComparisonsKt = ComparisonsKt__ComparisonsKt.nullsFirst$lambda$3$ComparisonsKt__ComparisonsKt((Comparator) obj3, obj, obj2);
+                return nullsFirst$lambda$3$ComparisonsKt__ComparisonsKt;
+            default:
+                compareBy$lambda$0$ComparisonsKt__ComparisonsKt = ComparisonsKt__ComparisonsKt.compareBy$lambda$0$ComparisonsKt__ComparisonsKt((Function1[]) obj3, obj, obj2);
+                return compareBy$lambda$0$ComparisonsKt__ComparisonsKt;
+        }
+    }
+}