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/io/path/FileVisitorBuilderImpl.java

@@ -0,0 +1,73 @@
+package kotlin.io.path;
+
+import C.w;
+import com.google.android.gms.measurement.api.AppMeasurementSdk;
+import java.io.IOException;
+import java.nio.file.FileVisitResult;
+import java.nio.file.FileVisitor;
+import java.nio.file.Path;
+import java.nio.file.attribute.BasicFileAttributes;
+import kotlin.Metadata;
+import kotlin.jvm.functions.Function2;
+import kotlin.jvm.internal.Intrinsics;
+
+@Metadata(d1 = {"\u0000L\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\b\u0002\n\u0002\u0010\u000b\n\u0000\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0002\u0018\u0002\n\u0000\n\u0002\u0018\u0002\n\u0002\b\u0003\n\u0002\u0018\u0002\n\u0000\n\u0002\u0010\u0002\n\u0002\b\u0002\n\u0002\u0010\u0000\n\u0000\n\u0002\u0010\u000e\n\u0002\u0018\u0002\n\u0002\b\u0005\b\u0001\u0018\u00002\u00020\u0001B\u0005¢\u0006\u0002\u0010\u0002J\f\u0010\u000e\u001a\b\u0012\u0004\u0012\u00020\u00070\u000fJ\b\u0010\u0010\u001a\u00020\u0011H\u0002J\u001a\u0010\u0012\u001a\u00020\u00112\b\u0010\u0013\u001a\u0004\u0018\u00010\u00142\u0006\u0010\u0015\u001a\u00020\u0016H\u0002JB\u0010\u0005\u001a\u00020\u001128\u0010\u0013\u001a4\u0012\u0013\u0012\u00110\u0007¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u0018\u0012\u0015\u0012\u0013\u0018\u00010\b¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u0019\u0012\u0004\u0012\u00020\t0\u0006H\u0016J@\u0010\n\u001a\u00020\u001126\u0010\u0013\u001a2\u0012\u0013\u0012\u00110\u0007¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u0018\u0012\u0013\u0012\u00110\u000b¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u001a\u0012\u0004\u0012\u00020\t0\u0006H\u0016J@\u0010\f\u001a\u00020\u001126\u0010\u0013\u001a2\u0012\u0013\u0012\u00110\u0007¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u001b\u0012\u0013\u0012\u00110\u000b¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u001a\u0012\u0004\u0012\u00020\t0\u0006H\u0016J@\u0010\r\u001a\u00020\u001126\u0010\u0013\u001a2\u0012\u0013\u0012\u00110\u0007¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u001b\u0012\u0013\u0012\u00110\b¢\u0006\f\b\u0017\u0012\b\b\u0015\u0012\u0004\b\b(\u0019\u0012\u0004\u0012\u00020\t0\u0006H\u0016R\u000e\u0010\u0003\u001a\u00020\u0004X\u0082\u000e¢\u0006\u0002\n\u0000R$\u0010\u0005\u001a\u0018\u0012\u0004\u0012\u00020\u0007\u0012\u0006\u0012\u0004\u0018\u00010\b\u0012\u0004\u0012\u00020\t\u0018\u00010\u0006X\u0082\u000e¢\u0006\u0002\n\u0000R\"\u0010\n\u001a\u0016\u0012\u0004\u0012\u00020\u0007\u0012\u0004\u0012\u00020\u000b\u0012\u0004\u0012\u00020\t\u0018\u00010\u0006X\u0082\u000e¢\u0006\u0002\n\u0000R\"\u0010\f\u001a\u0016\u0012\u0004\u0012\u00020\u0007\u0012\u0004\u0012\u00020\u000b\u0012\u0004\u0012\u00020\t\u0018\u00010\u0006X\u0082\u000e¢\u0006\u0002\n\u0000R\"\u0010\r\u001a\u0016\u0012\u0004\u0012\u00020\u0007\u0012\u0004\u0012\u00020\b\u0012\u0004\u0012\u00020\t\u0018\u00010\u0006X\u0082\u000e¢\u0006\u0002\n\u0000¨\u0006\u001c"}, d2 = {"Lkotlin/io/path/FileVisitorBuilderImpl;", "Lkotlin/io/path/FileVisitorBuilder;", "()V", "isBuilt", "", "onPostVisitDirectory", "Lkotlin/Function2;", "Ljava/nio/file/Path;", "Ljava/io/IOException;", "Ljava/nio/file/FileVisitResult;", "onPreVisitDirectory", "Ljava/nio/file/attribute/BasicFileAttributes;", "onVisitFile", "onVisitFileFailed", "build", "Ljava/nio/file/FileVisitor;", "checkIsNotBuilt", "", "checkNotDefined", "function", "", AppMeasurementSdk.ConditionalUserProperty.NAME, "", "Lkotlin/ParameterName;", "directory", "exception", "attributes", "file", "kotlin-stdlib-jdk7"}, k = 1, mv = {1, 9, 0}, xi = 48)
+@ExperimentalPathApi
+/* loaded from: classes3.dex */
+public final class FileVisitorBuilderImpl implements FileVisitorBuilder {
+    private boolean isBuilt;
+    private Function2<? super Path, ? super IOException, ? extends FileVisitResult> onPostVisitDirectory;
+    private Function2<? super Path, ? super BasicFileAttributes, ? extends FileVisitResult> onPreVisitDirectory;
+    private Function2<? super Path, ? super BasicFileAttributes, ? extends FileVisitResult> onVisitFile;
+    private Function2<? super Path, ? super IOException, ? extends FileVisitResult> onVisitFileFailed;
+
+    private final void checkIsNotBuilt() {
+        if (this.isBuilt) {
+            throw new IllegalStateException("This builder was already built");
+        }
+    }
+
+    private final void checkNotDefined(Object function, String name) {
+        if (function != null) {
+            throw new IllegalStateException(w.n(name, " was already defined"));
+        }
+    }
+
+    public final FileVisitor<Path> build() {
+        checkIsNotBuilt();
+        this.isBuilt = true;
+        return new FileVisitorImpl(this.onPreVisitDirectory, this.onVisitFile, this.onVisitFileFailed, this.onPostVisitDirectory);
+    }
+
+    @Override // kotlin.io.path.FileVisitorBuilder
+    public void onPostVisitDirectory(Function2<? super Path, ? super IOException, ? extends FileVisitResult> function) {
+        Intrinsics.checkNotNullParameter(function, "function");
+        checkIsNotBuilt();
+        checkNotDefined(this.onPostVisitDirectory, "onPostVisitDirectory");
+        this.onPostVisitDirectory = function;
+    }
+
+    @Override // kotlin.io.path.FileVisitorBuilder
+    public void onPreVisitDirectory(Function2<? super Path, ? super BasicFileAttributes, ? extends FileVisitResult> function) {
+        Intrinsics.checkNotNullParameter(function, "function");
+        checkIsNotBuilt();
+        checkNotDefined(this.onPreVisitDirectory, "onPreVisitDirectory");
+        this.onPreVisitDirectory = function;
+    }
+
+    @Override // kotlin.io.path.FileVisitorBuilder
+    public void onVisitFile(Function2<? super Path, ? super BasicFileAttributes, ? extends FileVisitResult> function) {
+        Intrinsics.checkNotNullParameter(function, "function");
+        checkIsNotBuilt();
+        checkNotDefined(this.onVisitFile, "onVisitFile");
+        this.onVisitFile = function;
+    }
+
+    @Override // kotlin.io.path.FileVisitorBuilder
+    public void onVisitFileFailed(Function2<? super Path, ? super IOException, ? extends FileVisitResult> function) {
+        Intrinsics.checkNotNullParameter(function, "function");
+        checkIsNotBuilt();
+        checkNotDefined(this.onVisitFileFailed, "onVisitFileFailed");
+        this.onVisitFileFailed = function;
+    }
+}