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/concurrent/LocksKt.java

@@ -0,0 +1,71 @@
+package kotlin.concurrent;
+
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantReadWriteLock;
+import kotlin.Metadata;
+import kotlin.internal.InlineOnly;
+import kotlin.jvm.JvmName;
+import kotlin.jvm.functions.Function0;
+import kotlin.jvm.internal.InlineMarker;
+import kotlin.jvm.internal.Intrinsics;
+import kotlin.jvm.internal.SourceDebugExtension;
+
+@Metadata(d1 = {"\u0000\u001a\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0018\u0002\n\u0002\b\u0003\u001a6\u0010\u0000\u001a\u0002H\u0001\"\u0004\b\u0000\u0010\u0001*\u00020\u00022\f\u0010\u0003\u001a\b\u0012\u0004\u0012\u0002H\u00010\u0004H\u0087\bø\u0001\u0000\u0082\u0002\n\n\b\b\u0001\u0012\u0002\u0010\u0001 \u0001¢\u0006\u0002\u0010\u0005\u001a6\u0010\u0006\u001a\u0002H\u0001\"\u0004\b\u0000\u0010\u0001*\u00020\u00072\f\u0010\u0003\u001a\b\u0012\u0004\u0012\u0002H\u00010\u0004H\u0087\bø\u0001\u0000\u0082\u0002\n\n\b\b\u0001\u0012\u0002\u0010\u0001 \u0001¢\u0006\u0002\u0010\b\u001a6\u0010\t\u001a\u0002H\u0001\"\u0004\b\u0000\u0010\u0001*\u00020\u00022\f\u0010\u0003\u001a\b\u0012\u0004\u0012\u0002H\u00010\u0004H\u0087\bø\u0001\u0000\u0082\u0002\n\n\b\b\u0001\u0012\u0002\u0010\u0001 \u0001¢\u0006\u0002\u0010\u0005\u0082\u0002\u0007\n\u0005\b\u009920\u0001¨\u0006\n"}, d2 = {"read", "T", "Ljava/util/concurrent/locks/ReentrantReadWriteLock;", "action", "Lkotlin/Function0;", "(Ljava/util/concurrent/locks/ReentrantReadWriteLock;Lkotlin/jvm/functions/Function0;)Ljava/lang/Object;", "withLock", "Ljava/util/concurrent/locks/Lock;", "(Ljava/util/concurrent/locks/Lock;Lkotlin/jvm/functions/Function0;)Ljava/lang/Object;", "write", "kotlin-stdlib"}, k = 2, mv = {1, 9, 0}, xi = 48)
+@JvmName(name = "LocksKt")
+@SourceDebugExtension({"SMAP\nLocks.kt\nKotlin\n*S Kotlin\n*F\n+ 1 Locks.kt\nkotlin/concurrent/LocksKt\n+ 2 fake.kt\nkotlin/jvm/internal/FakeKt\n*L\n1#1,74:1\n1#2:75\n*E\n"})
+/* loaded from: classes3.dex */
+public final class LocksKt {
+    @InlineOnly
+    private static final <T> T read(ReentrantReadWriteLock reentrantReadWriteLock, Function0<? extends T> action) {
+        Intrinsics.checkNotNullParameter(reentrantReadWriteLock, "<this>");
+        Intrinsics.checkNotNullParameter(action, "action");
+        ReentrantReadWriteLock.ReadLock readLock = reentrantReadWriteLock.readLock();
+        readLock.lock();
+        try {
+            return action.invoke();
+        } finally {
+            InlineMarker.finallyStart(1);
+            readLock.unlock();
+            InlineMarker.finallyEnd(1);
+        }
+    }
+
+    @InlineOnly
+    private static final <T> T withLock(Lock lock, Function0<? extends T> action) {
+        Intrinsics.checkNotNullParameter(lock, "<this>");
+        Intrinsics.checkNotNullParameter(action, "action");
+        lock.lock();
+        try {
+            return action.invoke();
+        } finally {
+            InlineMarker.finallyStart(1);
+            lock.unlock();
+            InlineMarker.finallyEnd(1);
+        }
+    }
+
+    @InlineOnly
+    private static final <T> T write(ReentrantReadWriteLock reentrantReadWriteLock, Function0<? extends T> action) {
+        Intrinsics.checkNotNullParameter(reentrantReadWriteLock, "<this>");
+        Intrinsics.checkNotNullParameter(action, "action");
+        ReentrantReadWriteLock.ReadLock readLock = reentrantReadWriteLock.readLock();
+        int i = 0;
+        int readHoldCount = reentrantReadWriteLock.getWriteHoldCount() == 0 ? reentrantReadWriteLock.getReadHoldCount() : 0;
+        for (int i4 = 0; i4 < readHoldCount; i4++) {
+            readLock.unlock();
+        }
+        ReentrantReadWriteLock.WriteLock writeLock = reentrantReadWriteLock.writeLock();
+        writeLock.lock();
+        try {
+            return action.invoke();
+        } finally {
+            InlineMarker.finallyStart(1);
+            while (i < readHoldCount) {
+                readLock.lock();
+                i++;
+            }
+            writeLock.unlock();
+            InlineMarker.finallyEnd(1);
+        }
+    }
+}