diff --git a/nsync/src/sync-full-leaf.h b/nsync/src/sync-full-leaf.h
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+/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil -*- */
+/*
+ * Copyright (c) 2012 University of California, Los Angeles
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation;
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * Author: Zhenkai Zhu <zhenkai@cs.ucla.edu>
+ *         Chaoyi Bian <bcy@pku.edu.cn>
+ *	   Alexander Afanasyev <alexander.afanasyev@ucla.edu>
+ */
+
+#ifndef SYNC_FULL_LEAF_H
+#define SYNC_FULL_LEAF_H
+
+#include "sync-leaf.h"
+
+namespace Sync {
+
+/**
+ * @ingroup sync
+ * @brief SYNC leaf for the full state (with support of Digest calculation) 
+ */
+class FullLeaf : public Leaf
+{
+public:
+  /**
+   * @brief Constructor to create an UPDATE diff leaf
+   * @param info Smart pointer to leaf's name
+   * @param seq  Initial sequence number of the pointer
+   */
+  FullLeaf (NameInfoConstPtr info, const SeqNo &seq);
+  virtual ~FullLeaf () { }
+
+  /**
+   * @brief Get hash digest of the leaf
+   *
+   * The underlying Digest object is recalculated on every update or removal
+   * (including updates of child classes)
+   */
+  const Digest &
+  getDigest () const { return m_digest; }  
+
+  // from Leaf
+  virtual void
+  setSeq (const SeqNo &seq);
+  
+private:
+  void
+  updateDigest ();
+
+private:
+  Digest m_digest;
+};
+
+typedef boost::shared_ptr<FullLeaf> FullLeafPtr;
+typedef boost::shared_ptr<const FullLeaf> FullLeafConstPtr;
+
+} // Sync
+
+#endif // SYNC_FULL_LEAF_H