diff --git a/src/sync-core.h b/src/sync-core.h
index afe5e05..998be7d 100644
--- a/src/sync-core.h
+++ b/src/sync-core.h
@@ -51,8 +51,7 @@
            , const Name &localPrefix            // routable name used by the local user
            , const Name &syncPrefix             // the prefix for the sync collection
            , const StateMsgCallback &callback   // callback when state change is detected
-           , CcnxWrapperPtr handle
-           , SchedulerPtr scheduler);
+           , CcnxWrapperPtr handle);
   ~SyncCore();
 
   // some other code should call this fuction when local prefix
@@ -87,6 +86,9 @@
   void
   recover(const HashPtr &hash);
 
+  HashPtr
+  root() { return m_rootHash; }
+
 protected:
   void
   sendSyncInterest();
@@ -120,6 +122,8 @@
   Closure *m_syncClosure;
   Closure *m_recoverClosure;
 
+  IntervalGeneratorPtr m_recoverWaitGenerator;
+
 };
 
 #endif // SYNC_CORE_H