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/SynchronizedLazyImpl.java

@@ -0,0 +1,60 @@
+package kotlin;
+
+import java.io.Serializable;
+import kotlin.jvm.functions.Function0;
+import kotlin.jvm.internal.DefaultConstructorMarker;
+import kotlin.jvm.internal.Intrinsics;
+
+/* JADX INFO: Access modifiers changed from: package-private */
+@Metadata(d1 = {"\u00000\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u0000\n\u0002\b\u0006\n\u0002\u0010\u000b\n\u0000\n\u0002\u0010\u000e\n\u0002\b\u0002\b\u0002\u0018\u0000*\u0006\b\u0000\u0010\u0001 \u00012\b\u0012\u0004\u0012\u0002H\u00010\u00022\u00060\u0003j\u0002`\u0004B\u001f\u0012\f\u0010\u0005\u001a\b\u0012\u0004\u0012\u00028\u00000\u0006\u0012\n\b\u0002\u0010\u0007\u001a\u0004\u0018\u00010\b¢\u0006\u0002\u0010\tJ\b\u0010\u000e\u001a\u00020\u000fH\u0016J\b\u0010\u0010\u001a\u00020\u0011H\u0016J\b\u0010\u0012\u001a\u00020\bH\u0002R\u0010\u0010\n\u001a\u0004\u0018\u00010\bX\u0082\u000e¢\u0006\u0002\n\u0000R\u0016\u0010\u0005\u001a\n\u0012\u0004\u0012\u00028\u0000\u0018\u00010\u0006X\u0088\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\u0007\u001a\u00020\bX\u0082\u0004¢\u0006\u0002\n\u0000R\u0014\u0010\u000b\u001a\u00028\u00008VX\u0096\u0004¢\u0006\u0006\u001a\u0004\b\f\u0010\r¨\u0006\u0013"}, d2 = {"Lkotlin/SynchronizedLazyImpl;", "T", "Lkotlin/Lazy;", "Ljava/io/Serializable;", "Lkotlin/io/Serializable;", "initializer", "Lkotlin/Function0;", "lock", "", "(Lkotlin/jvm/functions/Function0;Ljava/lang/Object;)V", "_value", "value", "getValue", "()Ljava/lang/Object;", "isInitialized", "", "toString", "", "writeReplace", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public final class SynchronizedLazyImpl<T> implements Lazy<T>, Serializable {
+    private volatile Object _value;
+    private Function0<? extends T> initializer;
+    private final Object lock;
+
+    public SynchronizedLazyImpl(Function0<? extends T> initializer, Object obj) {
+        Intrinsics.checkNotNullParameter(initializer, "initializer");
+        this.initializer = initializer;
+        this._value = UNINITIALIZED_VALUE.INSTANCE;
+        this.lock = obj == null ? this : obj;
+    }
+
+    private final Object writeReplace() {
+        return new InitializedLazyImpl(getValue());
+    }
+
+    @Override // kotlin.Lazy
+    public T getValue() {
+        T t2;
+        T t4 = (T) this._value;
+        UNINITIALIZED_VALUE uninitialized_value = UNINITIALIZED_VALUE.INSTANCE;
+        if (t4 != uninitialized_value) {
+            return t4;
+        }
+        synchronized (this.lock) {
+            t2 = (T) this._value;
+            if (t2 == uninitialized_value) {
+                Function0<? extends T> function0 = this.initializer;
+                Intrinsics.checkNotNull(function0);
+                t2 = function0.invoke();
+                this._value = t2;
+                this.initializer = null;
+            }
+        }
+        return t2;
+    }
+
+    @Override // kotlin.Lazy
+    public boolean isInitialized() {
+        return this._value != UNINITIALIZED_VALUE.INSTANCE;
+    }
+
+    public String toString() {
+        return isInitialized() ? String.valueOf(getValue()) : "Lazy value not initialized yet.";
+    }
+
+    public /* synthetic */ SynchronizedLazyImpl(Function0 function0, Object obj, int i, DefaultConstructorMarker defaultConstructorMarker) {
+        this(function0, (i & 2) != 0 ? null : obj);
+    }
+}