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/RequiresOptIn.java

@@ -0,0 +1,61 @@
+package kotlin;
+
+import com.google.firebase.analytics.FirebaseAnalytics;
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import kotlin.annotation.AnnotationRetention;
+import kotlin.annotation.AnnotationTarget;
+import kotlin.enums.EnumEntries;
+import kotlin.enums.EnumEntriesKt;
+
+@Target({ElementType.ANNOTATION_TYPE})
+@SinceKotlin(version = "1.3")
+@Metadata(d1 = {"\u0000\u0018\n\u0002\u0018\u0002\n\u0002\u0010\u001b\n\u0000\n\u0002\u0010\u000e\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0004\b\u0087\u0002\u0018\u00002\u00020\u0001:\u0001\bB\u0014\u0012\b\b\u0002\u0010\u0002\u001a\u00020\u0003\u0012\b\b\u0002\u0010\u0004\u001a\u00020\u0005R\u000f\u0010\u0004\u001a\u00020\u0005¢\u0006\u0006\u001a\u0004\b\u0004\u0010\u0006R\u000f\u0010\u0002\u001a\u00020\u0003¢\u0006\u0006\u001a\u0004\b\u0002\u0010\u0007¨\u0006\t"}, d2 = {"Lkotlin/RequiresOptIn;", "", "message", "", FirebaseAnalytics.Param.LEVEL, "Lkotlin/RequiresOptIn$Level;", "()Lkotlin/RequiresOptIn$Level;", "()Ljava/lang/String;", "Level", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@kotlin.annotation.Target(allowedTargets = {AnnotationTarget.ANNOTATION_CLASS})
+@Retention(RetentionPolicy.CLASS)
+@kotlin.annotation.Retention(AnnotationRetention.BINARY)
+/* loaded from: classes3.dex */
+public @interface RequiresOptIn {
+
+    /* 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\u0004\b\u0086\u0081\u0002\u0018\u00002\b\u0012\u0004\u0012\u00020\u00000\u0001B\u0007\b\u0002¢\u0006\u0002\u0010\u0002j\u0002\b\u0003j\u0002\b\u0004¨\u0006\u0005"}, d2 = {"Lkotlin/RequiresOptIn$Level;", "", "(Ljava/lang/String;I)V", "WARNING", "ERROR", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+    /* loaded from: classes3.dex */
+    public static final class Level {
+        private static final /* synthetic */ EnumEntries $ENTRIES;
+        private static final /* synthetic */ Level[] $VALUES;
+        public static final Level WARNING = new Level("WARNING", 0);
+        public static final Level ERROR = new Level("ERROR", 1);
+
+        private static final /* synthetic */ Level[] $values() {
+            return new Level[]{WARNING, ERROR};
+        }
+
+        static {
+            Level[] $values = $values();
+            $VALUES = $values;
+            $ENTRIES = EnumEntriesKt.enumEntries($values);
+        }
+
+        private Level(String str, int i) {
+        }
+
+        public static EnumEntries<Level> getEntries() {
+            return $ENTRIES;
+        }
+
+        public static Level valueOf(String str) {
+            return (Level) Enum.valueOf(Level.class, str);
+        }
+
+        public static Level[] values() {
+            return (Level[]) $VALUES.clone();
+        }
+    }
+
+    Level level() default Level.ERROR;
+
+    String message() default "";
+}