diff --git a/public/database.worker.js b/public/database.worker.js
index 4fcef70..79dad88 100755
--- a/public/database.worker.js
+++ b/public/database.worker.js
@@ -8,24 +8,34 @@ self.addEventListener('activate', (event) => {
   event.waitUntil(self.clients.claim()); // Become available to all pages
 });
 
-// Event listener for messages from clients
+// ============================================
+// MESSAGE HANDLER
+// ============================================
+
 self.addEventListener('message', async (event) => {
   const data = event.data;
-  console.log(data);
+  console.log('[Service Worker] Message received:', data.type);
   
   if (data.type === 'SCAN') {
     try {
       const myProcessesId = data.payload;
       if (myProcessesId && myProcessesId.length != 0) {
-        const toDownload = await scanMissingData(myProcessesId);
-        if (toDownload.length != 0) {
-          console.log('Sending TO_DOWNLOAD message');
-          event.source.postMessage({ type: 'TO_DOWNLOAD', data: toDownload});
+        const scanResult = await scanMissingData(myProcessesId, event.source);
+        
+        if (scanResult.toDownload.length != 0) {
+          console.log('[Service Worker] Sending TO_DOWNLOAD message');
+          event.source.postMessage({ type: 'TO_DOWNLOAD', data: scanResult.toDownload });
+        }
+        
+        if (scanResult.diffsToCreate.length > 0) {
+          console.log('[Service Worker] Sending DIFFS_TO_CREATE message');
+          event.source.postMessage({ type: 'DIFFS_TO_CREATE', data: scanResult.diffsToCreate });
         }
       } else {
         event.source.postMessage({ status: 'error', message: 'Empty lists' });
       }
     } catch (error) {
+      console.error('[Service Worker] Scan error:', error);
       event.source.postMessage({ status: 'error', message: error.message });
     }
   }