diff --git a/src/detail/state.hpp b/src/detail/state.hpp
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@@ -0,0 +1,73 @@
+/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
+/*
+ * Copyright (c) 2014-2018,  The University of Memphis
+ *
+ * This file is part of PSync.
+ * See AUTHORS.md for complete list of PSync authors and contributors.
+ *
+ * PSync is free software: you can redistribute it and/or modify it under the terms
+ * of the GNU General Public License as published by the Free Software Foundation,
+ * either version 3 of the License, or (at your option) any later version.
+ *
+ * PSync 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
+ * PSync, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
+ **/
+
+#ifndef PSYNC_STATE_HPP
+#define PSYNC_STATE_HPP
+
+#include <ndn-cxx/name.hpp>
+
+namespace psync {
+
+namespace tlv {
+
+enum {
+  PSyncContent = 128
+};
+
+} // namespace tlv
+
+class State
+{
+public:
+  explicit State(const ndn::Block& block);
+
+  State() = default;
+
+  void
+  addContent(const ndn::Name& prefix);
+
+  std::vector<ndn::Name>
+  getContent() const
+  {
+    return m_content;
+  }
+
+  const ndn::Block&
+  wireEncode() const;
+
+  template<ndn::encoding::Tag TAG>
+  size_t
+  wireEncode(ndn::EncodingImpl<TAG>& block) const;
+
+  void
+  wireDecode(const ndn::Block& wire);
+
+private:
+  std::vector<ndn::Name> m_content;
+  mutable ndn::Block m_wire;
+};
+
+NDN_CXX_DECLARE_WIRE_ENCODE_INSTANTIATIONS(State);
+
+std::ostream&
+operator<<(std::ostream& os, const State& State);
+
+} // namespace psync
+
+#endif // PSYNC_STATE_HPP
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