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/experimental/BitwiseOperationsKt.java

@@ -0,0 +1,57 @@
+package kotlin.experimental;
+
+import kotlin.Metadata;
+import kotlin.SinceKotlin;
+import kotlin.internal.InlineOnly;
+
+@Metadata(d1 = {"\u0000\u0010\n\u0000\n\u0002\u0010\u0005\n\u0000\n\u0002\u0010\n\n\u0002\b\u0004\u001a\u0015\u0010\u0000\u001a\u00020\u0001*\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u0001H\u0087\f\u001a\u0015\u0010\u0000\u001a\u00020\u0003*\u00020\u00032\u0006\u0010\u0002\u001a\u00020\u0003H\u0087\f\u001a\r\u0010\u0004\u001a\u00020\u0001*\u00020\u0001H\u0087\b\u001a\r\u0010\u0004\u001a\u00020\u0003*\u00020\u0003H\u0087\b\u001a\u0015\u0010\u0005\u001a\u00020\u0001*\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u0001H\u0087\f\u001a\u0015\u0010\u0005\u001a\u00020\u0003*\u00020\u00032\u0006\u0010\u0002\u001a\u00020\u0003H\u0087\f\u001a\u0015\u0010\u0006\u001a\u00020\u0001*\u00020\u00012\u0006\u0010\u0002\u001a\u00020\u0001H\u0087\f\u001a\u0015\u0010\u0006\u001a\u00020\u0003*\u00020\u00032\u0006\u0010\u0002\u001a\u00020\u0003H\u0087\f¨\u0006\u0007"}, d2 = {"and", "", "other", "", "inv", "or", "xor", "kotlin-stdlib"}, k = 2, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public final class BitwiseOperationsKt {
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final byte and(byte b4, byte b5) {
+        return (byte) (b4 & b5);
+    }
+
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final byte inv(byte b4) {
+        return (byte) (~b4);
+    }
+
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final byte or(byte b4, byte b5) {
+        return (byte) (b4 | b5);
+    }
+
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final byte xor(byte b4, byte b5) {
+        return (byte) (b4 ^ b5);
+    }
+
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final short and(short s4, short s5) {
+        return (short) (s4 & s5);
+    }
+
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final short inv(short s4) {
+        return (short) (~s4);
+    }
+
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final short or(short s4, short s5) {
+        return (short) (s4 | s5);
+    }
+
+    @SinceKotlin(version = "1.1")
+    @InlineOnly
+    private static final short xor(short s4, short s5) {
+        return (short) (s4 ^ s5);
+    }
+}

apk_decompiled/sources/kotlin/experimental/ExperimentalNativeApi.java

@@ -0,0 +1,26 @@
+package kotlin.experimental;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import kotlin.Metadata;
+import kotlin.RequiresOptIn;
+import kotlin.SinceKotlin;
+import kotlin.annotation.AnnotationRetention;
+import kotlin.annotation.AnnotationTarget;
+import kotlin.annotation.MustBeDocumented;
+
+@Target({ElementType.TYPE, ElementType.FIELD, ElementType.METHOD, ElementType.PARAMETER, ElementType.CONSTRUCTOR, ElementType.LOCAL_VARIABLE, ElementType.ANNOTATION_TYPE})
+@SinceKotlin(version = "1.9")
+@RequiresOptIn(level = RequiresOptIn.Level.ERROR)
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.CLASS, AnnotationTarget.ANNOTATION_CLASS, AnnotationTarget.PROPERTY, AnnotationTarget.FIELD, AnnotationTarget.LOCAL_VARIABLE, AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.CONSTRUCTOR, AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER, AnnotationTarget.PROPERTY_SETTER, AnnotationTarget.TYPEALIAS})
+@Retention(RetentionPolicy.CLASS)
+@kotlin.annotation.Retention(AnnotationRetention.BINARY)
+@MustBeDocumented
+@Metadata(d1 = {"\u0000\n\n\u0002\u0018\u0002\n\u0002\u0010\u001b\n\u0000\b\u0087\u0002\u0018\u00002\u00020\u0001B\u0000¨\u0006\u0002"}, d2 = {"Lkotlin/experimental/ExperimentalNativeApi;", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@Documented
+/* loaded from: classes3.dex */
+public @interface ExperimentalNativeApi {
+}

apk_decompiled/sources/kotlin/experimental/ExperimentalObjCName.java

@@ -0,0 +1,26 @@
+package kotlin.experimental;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import kotlin.Metadata;
+import kotlin.RequiresOptIn;
+import kotlin.SinceKotlin;
+import kotlin.annotation.AnnotationRetention;
+import kotlin.annotation.AnnotationTarget;
+import kotlin.annotation.MustBeDocumented;
+
+@Target({ElementType.ANNOTATION_TYPE})
+@SinceKotlin(version = "1.8")
+@RequiresOptIn
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.ANNOTATION_CLASS})
+@Retention(RetentionPolicy.CLASS)
+@kotlin.annotation.Retention(AnnotationRetention.BINARY)
+@MustBeDocumented
+@Metadata(d1 = {"\u0000\n\n\u0002\u0018\u0002\n\u0002\u0010\u001b\n\u0000\b\u0087\u0002\u0018\u00002\u00020\u0001B\u0000¨\u0006\u0002"}, d2 = {"Lkotlin/experimental/ExperimentalObjCName;", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@Documented
+/* loaded from: classes3.dex */
+public @interface ExperimentalObjCName {
+}

apk_decompiled/sources/kotlin/experimental/ExperimentalObjCRefinement.java

@@ -0,0 +1,26 @@
+package kotlin.experimental;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import kotlin.Metadata;
+import kotlin.RequiresOptIn;
+import kotlin.SinceKotlin;
+import kotlin.annotation.AnnotationRetention;
+import kotlin.annotation.AnnotationTarget;
+import kotlin.annotation.MustBeDocumented;
+
+@Target({ElementType.ANNOTATION_TYPE})
+@SinceKotlin(version = "1.8")
+@RequiresOptIn
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.ANNOTATION_CLASS})
+@Retention(RetentionPolicy.CLASS)
+@kotlin.annotation.Retention(AnnotationRetention.BINARY)
+@MustBeDocumented
+@Metadata(d1 = {"\u0000\n\n\u0002\u0018\u0002\n\u0002\u0010\u001b\n\u0000\b\u0087\u0002\u0018\u00002\u00020\u0001B\u0000¨\u0006\u0002"}, d2 = {"Lkotlin/experimental/ExperimentalObjCRefinement;", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@Documented
+/* loaded from: classes3.dex */
+public @interface ExperimentalObjCRefinement {
+}

apk_decompiled/sources/kotlin/experimental/ExperimentalTypeInference.java

@@ -0,0 +1,26 @@
+package kotlin.experimental;
+
+import java.lang.annotation.Documented;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import kotlin.Metadata;
+import kotlin.RequiresOptIn;
+import kotlin.SinceKotlin;
+import kotlin.annotation.AnnotationRetention;
+import kotlin.annotation.AnnotationTarget;
+import kotlin.annotation.MustBeDocumented;
+
+@Target({ElementType.ANNOTATION_TYPE})
+@SinceKotlin(version = "1.3")
+@RequiresOptIn(level = RequiresOptIn.Level.ERROR)
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.ANNOTATION_CLASS})
+@Retention(RetentionPolicy.CLASS)
+@kotlin.annotation.Retention(AnnotationRetention.BINARY)
+@MustBeDocumented
+@Metadata(d1 = {"\u0000\n\n\u0002\u0018\u0002\n\u0002\u0010\u001b\n\u0000\b\u0087\u0002\u0018\u00002\u00020\u0001B\u0000¨\u0006\u0002"}, d2 = {"Lkotlin/experimental/ExperimentalTypeInference;", "", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@Documented
+/* loaded from: classes3.dex */
+public @interface ExperimentalTypeInference {
+}