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/kotlinx/android/extensions/CacheImplementation.java

@@ -0,0 +1,67 @@
+package kotlinx.android.extensions;
+
+import kotlin.Metadata;
+import kotlin.enums.EnumEntries;
+import kotlin.enums.EnumEntriesKt;
+import kotlin.jvm.internal.DefaultConstructorMarker;
+
+/* JADX WARN: Failed to restore enum class, 'enum' modifier and super class removed */
+/* JADX WARN: Unknown enum class pattern. Please report as an issue! */
+@Metadata(d1 = {"\u0000\f\n\u0002\u0018\u0002\n\u0002\u0010\u0010\n\u0002\b\u0006\b\u0086\u0081\u0002\u0018\u0000 \u00062\b\u0012\u0004\u0012\u00020\u00000\u0001:\u0001\u0006B\u0007\b\u0002¢\u0006\u0002\u0010\u0002j\u0002\b\u0003j\u0002\b\u0004j\u0002\b\u0005¨\u0006\u0007"}, d2 = {"Lkotlinx/android/extensions/CacheImplementation;", "", "(Ljava/lang/String;I)V", "SPARSE_ARRAY", "HASH_MAP", "NO_CACHE", "Companion", "kotlin-android-extensions-runtime"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public final class CacheImplementation {
+    private static final /* synthetic */ EnumEntries $ENTRIES;
+    private static final /* synthetic */ CacheImplementation[] $VALUES;
+
+    /* renamed from: Companion, reason: from kotlin metadata */
+    public static final Companion INSTANCE;
+    private static final CacheImplementation DEFAULT;
+    public static final CacheImplementation HASH_MAP;
+    public static final CacheImplementation NO_CACHE;
+    public static final CacheImplementation SPARSE_ARRAY = new CacheImplementation("SPARSE_ARRAY", 0);
+
+    @Metadata(d1 = {"\u0000\u0014\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\b\u0003\b\u0086\u0003\u0018\u00002\u00020\u0001B\u0007\b\u0002¢\u0006\u0002\u0010\u0002R\u0011\u0010\u0003\u001a\u00020\u0004¢\u0006\b\n\u0000\u001a\u0004\b\u0005\u0010\u0006¨\u0006\u0007"}, d2 = {"Lkotlinx/android/extensions/CacheImplementation$Companion;", "", "()V", "DEFAULT", "Lkotlinx/android/extensions/CacheImplementation;", "getDEFAULT", "()Lkotlinx/android/extensions/CacheImplementation;", "kotlin-android-extensions-runtime"}, k = 1, mv = {1, 9, 0}, xi = 48)
+    /* loaded from: classes3.dex */
+    public static final class Companion {
+        public /* synthetic */ Companion(DefaultConstructorMarker defaultConstructorMarker) {
+            this();
+        }
+
+        public final CacheImplementation getDEFAULT() {
+            return CacheImplementation.DEFAULT;
+        }
+
+        private Companion() {
+        }
+    }
+
+    private static final /* synthetic */ CacheImplementation[] $values() {
+        return new CacheImplementation[]{SPARSE_ARRAY, HASH_MAP, NO_CACHE};
+    }
+
+    static {
+        CacheImplementation cacheImplementation = new CacheImplementation("HASH_MAP", 1);
+        HASH_MAP = cacheImplementation;
+        NO_CACHE = new CacheImplementation("NO_CACHE", 2);
+        CacheImplementation[] $values = $values();
+        $VALUES = $values;
+        $ENTRIES = EnumEntriesKt.enumEntries($values);
+        INSTANCE = new Companion(null);
+        DEFAULT = cacheImplementation;
+    }
+
+    private CacheImplementation(String str, int i) {
+    }
+
+    public static EnumEntries<CacheImplementation> getEntries() {
+        return $ENTRIES;
+    }
+
+    public static CacheImplementation valueOf(String str) {
+        return (CacheImplementation) Enum.valueOf(CacheImplementation.class, str);
+    }
+
+    public static CacheImplementation[] values() {
+        return (CacheImplementation[]) $VALUES.clone();
+    }
+}

apk_decompiled/sources/kotlinx/android/extensions/ContainerOptions.java

@@ -0,0 +1,12 @@
+package kotlinx.android.extensions;
+
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import kotlin.Metadata;
+
+@Retention(RetentionPolicy.RUNTIME)
+@Metadata(d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u001b\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0002\b\u0086\u0002\u0018\u00002\u00020\u0001B\n\u0012\b\b\u0002\u0010\u0002\u001a\u00020\u0003R\u000f\u0010\u0002\u001a\u00020\u0003¢\u0006\u0006\u001a\u0004\b\u0002\u0010\u0004¨\u0006\u0005"}, d2 = {"Lkotlinx/android/extensions/ContainerOptions;", "", "cache", "Lkotlinx/android/extensions/CacheImplementation;", "()Lkotlinx/android/extensions/CacheImplementation;", "kotlin-android-extensions-runtime"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public @interface ContainerOptions {
+    CacheImplementation cache() default CacheImplementation.HASH_MAP;
+}

apk_decompiled/sources/kotlinx/android/extensions/LayoutContainer.java

@@ -0,0 +1,10 @@
+package kotlinx.android.extensions;
+
+import android.view.View;
+import kotlin.Metadata;
+
+@Metadata(d1 = {"\u0000\u0012\n\u0002\u0018\u0002\n\u0002\u0010\u0000\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0003\bf\u0018\u00002\u00020\u0001R\u0014\u0010\u0002\u001a\u0004\u0018\u00010\u0003X¦\u0004¢\u0006\u0006\u001a\u0004\b\u0004\u0010\u0005¨\u0006\u0006"}, d2 = {"Lkotlinx/android/extensions/LayoutContainer;", "", "containerView", "Landroid/view/View;", "getContainerView", "()Landroid/view/View;", "kotlin-android-extensions-runtime"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public interface LayoutContainer {
+    View getContainerView();
+}