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/ArraysKt__ArraysJVMKt.java

@@ -0,0 +1,61 @@
+package kotlin.collections;
+
+import java.lang.reflect.Array;
+import java.nio.charset.Charset;
+import java.util.Arrays;
+import java.util.Collection;
+import kotlin.Metadata;
+import kotlin.PublishedApi;
+import kotlin.SinceKotlin;
+import kotlin.internal.InlineOnly;
+import kotlin.jvm.JvmName;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.jvm.internal.SourceDebugExtension;
+
+@Metadata(d1 = {"\u00002\n\u0000\n\u0002\u0010\u0011\n\u0002\b\u0003\n\u0002\u0010\b\n\u0002\b\u0002\n\u0002\u0010\u0002\n\u0002\b\u0007\n\u0002\u0010\u000e\n\u0002\u0010\u0012\n\u0000\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u001e\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\u00012\u0006\u0010\u0004\u001a\u00020\u0005H\u0000¢\u0006\u0002\u0010\u0006\u001a\u0018\u0010\u0007\u001a\u00020\b2\u0006\u0010\t\u001a\u00020\u00052\u0006\u0010\u0004\u001a\u00020\u0005H\u0001\u001a#\u0010\n\u001a\u00020\u0005\"\u0004\b\u0000\u0010\u0002*\f\u0012\u0006\b\u0001\u0012\u0002H\u0002\u0018\u00010\u0001H\u0001¢\u0006\u0004\b\u000b\u0010\f\u001a,\u0010\r\u001a\n\u0012\u0006\b\u0001\u0012\u0002H\u00020\u0001\"\u0006\b\u0000\u0010\u0002\u0018\u0001*\f\u0012\u0006\b\u0001\u0012\u0002H\u0002\u0018\u00010\u0001H\u0086\b¢\u0006\u0002\u0010\u000e\u001a\u0015\u0010\u000f\u001a\u00020\u0010*\u00020\u00112\u0006\u0010\u0012\u001a\u00020\u0013H\u0087\b\u001a&\u0010\u0014\u001a\b\u0012\u0004\u0012\u0002H\u00020\u0001\"\u0006\b\u0000\u0010\u0002\u0018\u0001*\b\u0012\u0004\u0012\u0002H\u00020\u0015H\u0086\b¢\u0006\u0002\u0010\u0016¨\u0006\u0017"}, d2 = {"arrayOfNulls", "", "T", "reference", "size", "", "([Ljava/lang/Object;I)[Ljava/lang/Object;", "copyOfRangeToIndexCheck", "", "toIndex", "contentDeepHashCodeImpl", "contentDeepHashCode", "([Ljava/lang/Object;)I", "orEmpty", "([Ljava/lang/Object;)[Ljava/lang/Object;", "toString", "", "", "charset", "Ljava/nio/charset/Charset;", "toTypedArray", "", "(Ljava/util/Collection;)[Ljava/lang/Object;", "kotlin-stdlib"}, k = 5, mv = {1, 9, 0}, xi = 49, xs = "kotlin/collections/ArraysKt")
+@SourceDebugExtension({"SMAP\nArraysJVM.kt\nKotlin\n*S Kotlin\n*F\n+ 1 ArraysJVM.kt\nkotlin/collections/ArraysKt__ArraysJVMKt\n+ 2 ArrayIntrinsics.kt\nkotlin/ArrayIntrinsicsKt\n*L\n1#1,61:1\n26#2:62\n*S KotlinDebug\n*F\n+ 1 ArraysJVM.kt\nkotlin/collections/ArraysKt__ArraysJVMKt\n*L\n18#1:62\n*E\n"})
+/* loaded from: classes3.dex */
+class ArraysKt__ArraysJVMKt {
+    public static final <T> T[] arrayOfNulls(T[] reference, int i) {
+        Intrinsics.checkNotNullParameter(reference, "reference");
+        Object newInstance = Array.newInstance(reference.getClass().getComponentType(), i);
+        Intrinsics.checkNotNull(newInstance, "null cannot be cast to non-null type kotlin.Array<T of kotlin.collections.ArraysKt__ArraysJVMKt.arrayOfNulls>");
+        return (T[]) ((Object[]) newInstance);
+    }
+
+    @SinceKotlin(version = "1.3")
+    @PublishedApi
+    @JvmName(name = "contentDeepHashCode")
+    public static final <T> int contentDeepHashCode(T[] tArr) {
+        return Arrays.deepHashCode(tArr);
+    }
+
+    @SinceKotlin(version = "1.3")
+    public static final void copyOfRangeToIndexCheck(int i, int i4) {
+        if (i <= i4) {
+            return;
+        }
+        throw new IndexOutOfBoundsException("toIndex (" + i + ") is greater than size (" + i4 + ").");
+    }
+
+    public static final /* synthetic */ <T> T[] orEmpty(T[] tArr) {
+        if (tArr != null) {
+            return tArr;
+        }
+        Intrinsics.reifiedOperationMarker(0, "T?");
+        return (T[]) new Object[0];
+    }
+
+    @InlineOnly
+    private static final String toString(byte[] bArr, Charset charset) {
+        Intrinsics.checkNotNullParameter(bArr, "<this>");
+        Intrinsics.checkNotNullParameter(charset, "charset");
+        return new String(bArr, charset);
+    }
+
+    public static final /* synthetic */ <T> T[] toTypedArray(Collection<? extends T> collection) {
+        Intrinsics.checkNotNullParameter(collection, "<this>");
+        Intrinsics.reifiedOperationMarker(0, "T?");
+        return (T[]) collection.toArray(new Object[0]);
+    }
+}