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/collections/SetsKt__SetsJVMKt.java

@@ -0,0 +1,75 @@
+package kotlin.collections;
+
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.Set;
+import java.util.TreeSet;
+import kotlin.Metadata;
+import kotlin.PublishedApi;
+import kotlin.SinceKotlin;
+import kotlin.Unit;
+import kotlin.collections.builders.SetBuilder;
+import kotlin.internal.InlineOnly;
+import kotlin.jvm.functions.Function1;
+import kotlin.jvm.internal.Intrinsics;
+
+/* JADX INFO: Access modifiers changed from: package-private */
+@Metadata(d1 = {"\u0000B\n\u0000\n\u0002\u0010\"\n\u0002\b\u0002\n\u0002\u0010#\n\u0002\b\u0002\n\u0002\u0010\b\n\u0000\n\u0002\u0018\u0002\n\u0002\u0010\u0002\n\u0002\u0018\u0002\n\u0002\b\u0006\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u0011\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\b\u0002\u001a\"\u0010\u0000\u001a\b\u0012\u0004\u0012\u0002H\u00020\u0001\"\u0004\b\u0000\u0010\u00022\f\u0010\u0003\u001a\b\u0012\u0004\u0012\u0002H\u00020\u0004H\u0001\u001a?\u0010\u0005\u001a\b\u0012\u0004\u0012\u0002H\u00020\u0001\"\u0004\b\u0000\u0010\u00022\u0006\u0010\u0006\u001a\u00020\u00072\u001d\u0010\b\u001a\u0019\u0012\n\u0012\b\u0012\u0004\u0012\u0002H\u00020\u0004\u0012\u0004\u0012\u00020\n0\t¢\u0006\u0002\b\u000bH\u0081\bø\u0001\u0000\u001a7\u0010\u0005\u001a\b\u0012\u0004\u0012\u0002H\u00020\u0001\"\u0004\b\u0000\u0010\u00022\u001d\u0010\b\u001a\u0019\u0012\n\u0012\b\u0012\u0004\u0012\u0002H\u00020\u0004\u0012\u0004\u0012\u00020\n0\t¢\u0006\u0002\b\u000bH\u0081\bø\u0001\u0000\u001a\u0014\u0010\f\u001a\b\u0012\u0004\u0012\u0002H\u00020\u0004\"\u0004\b\u0000\u0010\u0002H\u0001\u001a\u001c\u0010\f\u001a\b\u0012\u0004\u0012\u0002H\u00020\u0004\"\u0004\b\u0000\u0010\u00022\u0006\u0010\u0006\u001a\u00020\u0007H\u0001\u001a\u001f\u0010\r\u001a\b\u0012\u0004\u0012\u0002H\u000e0\u0001\"\u0004\b\u0000\u0010\u000e2\u0006\u0010\u000f\u001a\u0002H\u000e¢\u0006\u0002\u0010\u0010\u001a+\u0010\u0011\u001a\b\u0012\u0004\u0012\u0002H\u000e0\u0012\"\u0004\b\u0000\u0010\u000e2\u0012\u0010\u0013\u001a\n\u0012\u0006\b\u0001\u0012\u0002H\u000e0\u0014\"\u0002H\u000e¢\u0006\u0002\u0010\u0015\u001aG\u0010\u0011\u001a\b\u0012\u0004\u0012\u0002H\u000e0\u0012\"\u0004\b\u0000\u0010\u000e2\u001a\u0010\u0016\u001a\u0016\u0012\u0006\b\u0000\u0012\u0002H\u000e0\u0017j\n\u0012\u0006\b\u0000\u0012\u0002H\u000e`\u00182\u0012\u0010\u0013\u001a\n\u0012\u0006\b\u0001\u0012\u0002H\u000e0\u0014\"\u0002H\u000e¢\u0006\u0002\u0010\u0019\u0082\u0002\u0007\n\u0005\b\u009920\u0001¨\u0006\u001a"}, d2 = {"build", "", "E", "builder", "", "buildSetInternal", "capacity", "", "builderAction", "Lkotlin/Function1;", "", "Lkotlin/ExtensionFunctionType;", "createSetBuilder", "setOf", "T", "element", "(Ljava/lang/Object;)Ljava/util/Set;", "sortedSetOf", "Ljava/util/TreeSet;", "elements", "", "([Ljava/lang/Object;)Ljava/util/TreeSet;", "comparator", "Ljava/util/Comparator;", "Lkotlin/Comparator;", "(Ljava/util/Comparator;[Ljava/lang/Object;)Ljava/util/TreeSet;", "kotlin-stdlib"}, k = 5, mv = {1, 9, 0}, xi = 49, xs = "kotlin/collections/SetsKt")
+/* loaded from: classes3.dex */
+public class SetsKt__SetsJVMKt {
+    @SinceKotlin(version = "1.3")
+    @PublishedApi
+    public static <E> Set<E> build(Set<E> builder) {
+        Intrinsics.checkNotNullParameter(builder, "builder");
+        return ((SetBuilder) builder).build();
+    }
+
+    @SinceKotlin(version = "1.3")
+    @PublishedApi
+    @InlineOnly
+    private static final <E> Set<E> buildSetInternal(Function1<? super Set<E>, Unit> builderAction) {
+        Intrinsics.checkNotNullParameter(builderAction, "builderAction");
+        Set createSetBuilder = createSetBuilder();
+        builderAction.invoke(createSetBuilder);
+        return build(createSetBuilder);
+    }
+
+    @SinceKotlin(version = "1.3")
+    @PublishedApi
+    public static <E> Set<E> createSetBuilder() {
+        return new SetBuilder();
+    }
+
+    public static <T> Set<T> setOf(T t2) {
+        Set<T> singleton = Collections.singleton(t2);
+        Intrinsics.checkNotNullExpressionValue(singleton, "singleton(...)");
+        return singleton;
+    }
+
+    public static final <T> TreeSet<T> sortedSetOf(T... elements) {
+        Intrinsics.checkNotNullParameter(elements, "elements");
+        return (TreeSet) ArraysKt___ArraysKt.toCollection(elements, new TreeSet());
+    }
+
+    @SinceKotlin(version = "1.3")
+    @PublishedApi
+    @InlineOnly
+    private static final <E> Set<E> buildSetInternal(int i, Function1<? super Set<E>, Unit> builderAction) {
+        Intrinsics.checkNotNullParameter(builderAction, "builderAction");
+        Set createSetBuilder = createSetBuilder(i);
+        builderAction.invoke(createSetBuilder);
+        return build(createSetBuilder);
+    }
+
+    @SinceKotlin(version = "1.3")
+    @PublishedApi
+    public static <E> Set<E> createSetBuilder(int i) {
+        return new SetBuilder(i);
+    }
+
+    public static final <T> TreeSet<T> sortedSetOf(Comparator<? super T> comparator, T... elements) {
+        Intrinsics.checkNotNullParameter(comparator, "comparator");
+        Intrinsics.checkNotNullParameter(elements, "elements");
+        return (TreeSet) ArraysKt___ArraysKt.toCollection(elements, new TreeSet(comparator));
+    }
+}