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/builders/SetBuilder.java

@@ -0,0 +1,112 @@
+package kotlin.collections.builders;
+
+import java.io.NotSerializableException;
+import java.io.Serializable;
+import java.util.Collection;
+import java.util.Iterator;
+import java.util.Set;
+import kotlin.Metadata;
+import kotlin.collections.AbstractMutableSet;
+import kotlin.jvm.internal.DefaultConstructorMarker;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.jvm.internal.markers.KMutableSet;
+
+@Metadata(d1 = {"\u0000V\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010#\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0010\b\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\b\u0005\n\u0002\u0010\u000b\n\u0002\b\u0004\n\u0002\u0010\u001e\n\u0000\n\u0002\u0010\"\n\u0000\n\u0002\u0010\u0002\n\u0002\b\u0003\n\u0002\u0010)\n\u0002\b\u0004\n\u0002\u0010\u0000\n\u0002\b\u0002\b\u0000\u0018\u0000 $*\u0004\b\u0000\u0010\u00012\b\u0012\u0004\u0012\u0002H\u00010\u00022\b\u0012\u0004\u0012\u0002H\u00010\u00032\u00060\u0004j\u0002`\u0005:\u0001$B\u0007\b\u0016¢\u0006\u0002\u0010\u0006B\u000f\b\u0016\u0012\u0006\u0010\u0007\u001a\u00020\b¢\u0006\u0002\u0010\tB\u0019\b\u0000\u0012\u0010\u0010\n\u001a\f\u0012\u0004\u0012\u00028\u0000\u0012\u0002\b\u00030\u000b¢\u0006\u0002\u0010\fJ\u0015\u0010\u0010\u001a\u00020\u00112\u0006\u0010\u0012\u001a\u00028\u0000H\u0016¢\u0006\u0002\u0010\u0013J\u0016\u0010\u0014\u001a\u00020\u00112\f\u0010\u0015\u001a\b\u0012\u0004\u0012\u00028\u00000\u0016H\u0016J\f\u0010\u0017\u001a\b\u0012\u0004\u0012\u00028\u00000\u0018J\b\u0010\u0019\u001a\u00020\u001aH\u0016J\u0016\u0010\u001b\u001a\u00020\u00112\u0006\u0010\u0012\u001a\u00028\u0000H\u0096\u0002¢\u0006\u0002\u0010\u0013J\b\u0010\u001c\u001a\u00020\u0011H\u0016J\u000f\u0010\u001d\u001a\b\u0012\u0004\u0012\u00028\u00000\u001eH\u0096\u0002J\u0015\u0010\u001f\u001a\u00020\u00112\u0006\u0010\u0012\u001a\u00028\u0000H\u0016¢\u0006\u0002\u0010\u0013J\u0016\u0010 \u001a\u00020\u00112\f\u0010\u0015\u001a\b\u0012\u0004\u0012\u00028\u00000\u0016H\u0016J\u0016\u0010!\u001a\u00020\u00112\f\u0010\u0015\u001a\b\u0012\u0004\u0012\u00028\u00000\u0016H\u0016J\b\u0010\"\u001a\u00020#H\u0002R\u0018\u0010\n\u001a\f\u0012\u0004\u0012\u00028\u0000\u0012\u0002\b\u00030\u000bX\u0082\u0004¢\u0006\u0002\n\u0000R\u0014\u0010\r\u001a\u00020\b8VX\u0096\u0004¢\u0006\u0006\u001a\u0004\b\u000e\u0010\u000f¨\u0006%"}, d2 = {"Lkotlin/collections/builders/SetBuilder;", "E", "", "Lkotlin/collections/AbstractMutableSet;", "Ljava/io/Serializable;", "Lkotlin/io/Serializable;", "()V", "initialCapacity", "", "(I)V", "backing", "Lkotlin/collections/builders/MapBuilder;", "(Lkotlin/collections/builders/MapBuilder;)V", "size", "getSize", "()I", "add", "", "element", "(Ljava/lang/Object;)Z", "addAll", "elements", "", "build", "", "clear", "", "contains", "isEmpty", "iterator", "", "remove", "removeAll", "retainAll", "writeReplace", "", "Companion", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public final class SetBuilder<E> extends AbstractMutableSet<E> implements Set<E>, Serializable, KMutableSet {
+    private static final Companion Companion = new Companion(null);
+    private static final SetBuilder Empty = new SetBuilder(MapBuilder.INSTANCE.getEmpty$kotlin_stdlib());
+    private final MapBuilder<E, ?> backing;
+
+    @Metadata(d1 = {"\u0000\u0016\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\u0010\u0001\n\u0000\b\u0082\u0003\u0018\u00002\u00020\u0001B\u0007\b\u0002¢\u0006\u0002\u0010\u0002R\u0014\u0010\u0003\u001a\b\u0012\u0004\u0012\u00020\u00050\u0004X\u0082\u0004¢\u0006\u0002\n\u0000¨\u0006\u0006"}, d2 = {"Lkotlin/collections/builders/SetBuilder$Companion;", "", "()V", "Empty", "Lkotlin/collections/builders/SetBuilder;", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+    /* loaded from: classes3.dex */
+    public static final class Companion {
+        public /* synthetic */ Companion(DefaultConstructorMarker defaultConstructorMarker) {
+            this();
+        }
+
+        private Companion() {
+        }
+    }
+
+    public SetBuilder(MapBuilder<E, ?> backing) {
+        Intrinsics.checkNotNullParameter(backing, "backing");
+        this.backing = backing;
+    }
+
+    private final Object writeReplace() {
+        if (this.backing.getIsReadOnly()) {
+            return new SerializedCollection(this, 1);
+        }
+        throw new NotSerializableException("The set cannot be serialized while it is being built.");
+    }
+
+    @Override // kotlin.collections.AbstractMutableSet, java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public boolean add(E element) {
+        return this.backing.addKey$kotlin_stdlib(element) >= 0;
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public boolean addAll(Collection<? extends E> elements) {
+        Intrinsics.checkNotNullParameter(elements, "elements");
+        this.backing.checkIsMutable$kotlin_stdlib();
+        return super.addAll(elements);
+    }
+
+    public final Set<E> build() {
+        this.backing.build();
+        return size() > 0 ? this : Empty;
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public void clear() {
+        this.backing.clear();
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public boolean contains(Object element) {
+        return this.backing.containsKey(element);
+    }
+
+    @Override // kotlin.collections.AbstractMutableSet
+    public int getSize() {
+        return this.backing.size();
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public boolean isEmpty() {
+        return this.backing.isEmpty();
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.lang.Iterable, java.util.Set
+    public Iterator<E> iterator() {
+        return this.backing.keysIterator$kotlin_stdlib();
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public boolean remove(Object element) {
+        return this.backing.removeKey$kotlin_stdlib(element) >= 0;
+    }
+
+    @Override // java.util.AbstractSet, java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public boolean removeAll(Collection<? extends Object> elements) {
+        Intrinsics.checkNotNullParameter(elements, "elements");
+        this.backing.checkIsMutable$kotlin_stdlib();
+        return super.removeAll(elements);
+    }
+
+    @Override // java.util.AbstractCollection, java.util.Collection, java.util.Set
+    public boolean retainAll(Collection<? extends Object> elements) {
+        Intrinsics.checkNotNullParameter(elements, "elements");
+        this.backing.checkIsMutable$kotlin_stdlib();
+        return super.retainAll(elements);
+    }
+
+    public SetBuilder() {
+        this(new MapBuilder());
+    }
+
+    public SetBuilder(int i) {
+        this(new MapBuilder(i));
+    }
+}