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/SafePublicationLazyImpl.java

@@ -0,0 +1,58 @@
+package kotlin;
+
+import java.io.Serializable;
+import java.util.concurrent.atomic.AtomicReferenceFieldUpdater;
+import kotlin.jvm.functions.Function0;
+import kotlin.jvm.internal.Intrinsics;
+
+/* JADX INFO: Access modifiers changed from: package-private */
+@Metadata(d1 = {"\u00002\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\u0002\b\u0002\n\u0002\u0010\u0000\n\u0002\b\u0005\n\u0002\u0010\u000b\n\u0000\n\u0002\u0010\u000e\n\u0002\b\u0003\b\u0002\u0018\u0000 \u0013*\u0006\b\u0000\u0010\u0001 \u00012\b\u0012\u0004\u0012\u0002H\u00010\u00022\u00060\u0003j\u0002`\u0004:\u0001\u0013B\u0013\u0012\f\u0010\u0005\u001a\b\u0012\u0004\u0012\u00028\u00000\u0006¢\u0006\u0002\u0010\u0007J\b\u0010\u000e\u001a\u00020\u000fH\u0016J\b\u0010\u0010\u001a\u00020\u0011H\u0016J\b\u0010\u0012\u001a\u00020\tH\u0002R\u0010\u0010\b\u001a\u0004\u0018\u00010\tX\u0082\u000e¢\u0006\u0002\n\u0000R\u000e\u0010\n\u001a\u00020\tX\u0082\u0004¢\u0006\u0002\n\u0000R\u0016\u0010\u0005\u001a\n\u0012\u0004\u0012\u00028\u0000\u0018\u00010\u0006X\u0088\u000e¢\u0006\u0002\n\u0000R\u0014\u0010\u000b\u001a\u00028\u00008VX\u0096\u0004¢\u0006\u0006\u001a\u0004\b\f\u0010\r¨\u0006\u0014"}, d2 = {"Lkotlin/SafePublicationLazyImpl;", "T", "Lkotlin/Lazy;", "Ljava/io/Serializable;", "Lkotlin/io/Serializable;", "initializer", "Lkotlin/Function0;", "(Lkotlin/jvm/functions/Function0;)V", "_value", "", "final", "value", "getValue", "()Ljava/lang/Object;", "isInitialized", "", "toString", "", "writeReplace", "Companion", "kotlin-stdlib"}, k = 1, mv = {1, 9, 0}, xi = 48)
+/* loaded from: classes3.dex */
+public final class SafePublicationLazyImpl<T> implements Lazy<T>, Serializable {
+    private static final AtomicReferenceFieldUpdater<SafePublicationLazyImpl<?>, Object> valueUpdater = AtomicReferenceFieldUpdater.newUpdater(SafePublicationLazyImpl.class, Object.class, "_value");
+    private volatile Object _value;
+    private final Object final;
+    private volatile Function0<? extends T> initializer;
+
+    public SafePublicationLazyImpl(Function0<? extends T> initializer) {
+        Intrinsics.checkNotNullParameter(initializer, "initializer");
+        this.initializer = initializer;
+        UNINITIALIZED_VALUE uninitialized_value = UNINITIALIZED_VALUE.INSTANCE;
+        this._value = uninitialized_value;
+        this.final = uninitialized_value;
+    }
+
+    private final Object writeReplace() {
+        return new InitializedLazyImpl(getValue());
+    }
+
+    @Override // kotlin.Lazy
+    public T getValue() {
+        T t2 = (T) this._value;
+        UNINITIALIZED_VALUE uninitialized_value = UNINITIALIZED_VALUE.INSTANCE;
+        if (t2 != uninitialized_value) {
+            return t2;
+        }
+        Function0<? extends T> function0 = this.initializer;
+        if (function0 != null) {
+            T invoke = function0.invoke();
+            AtomicReferenceFieldUpdater<SafePublicationLazyImpl<?>, Object> atomicReferenceFieldUpdater = valueUpdater;
+            while (!atomicReferenceFieldUpdater.compareAndSet(this, uninitialized_value, invoke)) {
+                if (atomicReferenceFieldUpdater.get(this) != uninitialized_value) {
+                }
+            }
+            this.initializer = null;
+            return invoke;
+        }
+        return (T) this._value;
+    }
+
+    @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.";
+    }
+}