diff --git a/Launcher/runtime/dialog/overlay/update/update.js b/Launcher/runtime/dialog/overlay/update/update.js
index d4e366ca..04d9fc86 100644
--- a/Launcher/runtime/dialog/overlay/update/update.js
+++ b/Launcher/runtime/dialog/overlay/update/update.js
@@ -71,25 +71,11 @@ var update = {
     }
 };
 
-function offlineUpdateRequest(dirName, dir, matcher, digest) {
-    return function() {
-        var hdir = settings.lastHDirs.get(dirName);
-        if (hdir === null) {
-            Request.requestError(java.lang.String.format("Директории '%s' нет в кэше", dirName));
-            return;
-        }
-
-        // Verify dir with matcher using ClientLauncher's API
-        ClientLauncher.verifyHDir(dir, hdir.object, matcher, digest);
-        return hdir;
-    };
-}
-
 /* Export functions */
 function makeUpdateRequest(dirName, dir, matcher, digest, callback) {
     var request = settings.offline ? { setStateCallback: function(stateCallback) { /* Ignored */ } } :
         new UpdateRequest(dirName, dir, matcher, digest);
-    var task = settings.offline ? newTask(offlineUpdateRequest(dirName, dir, matcher, digest)) :
+    var task = settings.offline ? newTask(FunctionalBridge.offlineUpdateRequest(dirName, dir, matcher, digest)) :
         newRequestTask(request);
 
     // Set task properties and start
diff --git a/Launcher/runtime/engine/api.js b/Launcher/runtime/engine/api.js
index effeb498..0cdbf766 100644
--- a/Launcher/runtime/engine/api.js
+++ b/Launcher/runtime/engine/api.js
@@ -2,6 +2,7 @@ var Launcher = LauncherClass.static;
 var LauncherConfig = LauncherConfigClass.static;
 var HTTPRequest = HTTPRequestClass.static;
 var DirBridge = DirBridgeClass.static;
+var FunctionalBridge = FunctionalBridgeClass.class;
 
 // Hasher class API imports
 var PlayerProfile = PlayerProfileClass.static;
diff --git a/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java b/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java
index f5e49818..82cf25be 100644
--- a/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java
+++ b/Launcher/src/main/java/ru/gravit/launcher/LauncherEngine.java
@@ -133,6 +133,7 @@ public static void addLauncherClassBindings(Map<String, Object> bindings) {
         bindings.put("DigestAlgorithmClass", SecurityHelper.DigestAlgorithm.class);
         bindings.put("VerifyHelperClass", VerifyHelper.class);
         bindings.put("DirBridgeClass", DirBridge.class);
+        bindings.put("FunctionalBridgeClass",FunctionalBridge.class);
 
         // Load JS API if available
         bindings.put("RingProgressIndicatorClass", RingProgressIndicator.class);
diff --git a/Launcher/src/main/java/ru/gravit/launcher/client/FunctionalBridge.java b/Launcher/src/main/java/ru/gravit/launcher/client/FunctionalBridge.java
new file mode 100644
index 00000000..f234d528
--- /dev/null
+++ b/Launcher/src/main/java/ru/gravit/launcher/client/FunctionalBridge.java
@@ -0,0 +1,28 @@
+package ru.gravit.launcher.client;
+
+import ru.gravit.launcher.LauncherAPI;
+import ru.gravit.launcher.hasher.FileNameMatcher;
+import ru.gravit.launcher.hasher.HashedDir;
+import ru.gravit.launcher.request.Request;
+import ru.gravit.launcher.serialize.signed.SignedObjectHolder;
+
+import java.nio.file.Path;
+
+public class FunctionalBridge {
+    @LauncherAPI
+    public HashedDirRunnable offlineUpdateRequest(String dirName, Path dir, SignedObjectHolder<HashedDir> hdir, FileNameMatcher matcher, boolean digest) throws Exception
+    {
+        return () -> {
+            if(hdir == null)
+            {
+                Request.requestError(java.lang.String.format("Директории '%s' нет в кэше", dirName));
+            }
+            ClientLauncher.verifyHDir(dir, hdir.object, matcher, digest);
+            return hdir;
+        };
+    }
+    @FunctionalInterface
+    public interface HashedDirRunnable {
+        SignedObjectHolder<HashedDir> run() throws Exception;
+    }
+}