diff --git a/contrib/epee/include/net/jsonrpc_protocol_handler.h b/contrib/epee/include/net/jsonrpc_protocol_handler.h
new file mode 100644
index 00000000..b224c342
--- /dev/null
+++ b/contrib/epee/include/net/jsonrpc_protocol_handler.h
@@ -0,0 +1,167 @@
+#ifndef JSONRPC_PROTOCOL_HANDLER_H
+#define	JSONRPC_PROTOCOL_HANDLER_H
+
+#include <cstdint>
+#include <string>
+
+#include "net/net_utils_base.h"
+#include "jsonrpc_structs.h"
+#include "storages/portable_storage.h"
+#include "storages/portable_storage_template_helper.h"
+
+namespace epee
+{
+namespace net_utils
+{
+  namespace jsonrpc2
+  {
+  inline
+  std::string& make_error_resp_json(int64_t code, const std::string& message,
+                                    std::string& response_data,
+                                    const epee::serialization::storage_entry& id = nullptr)
+  {
+    epee::json_rpc::error_response rsp;
+    rsp.id = id;
+    rsp.jsonrpc = "2.0";
+    rsp.error.code = code;
+    rsp.error.message = message;
+    epee::serialization::store_t_to_json(static_cast<epee::json_rpc::error_response&>(rsp), response_data, 0, false);
+    response_data += "\n";
+    return response_data;
+  }
+
+    template<class t_connection_context>
+    struct i_jsonrpc2_server_handler
+    {
+      virtual ~i_jsonrpc2_server_handler()
+      {}
+      virtual bool handle_rpc_request(const std::string& req_data,
+                                      std::string& resp_data,
+                                      t_connection_context& conn_context) = 0;
+      virtual bool init_server_thread()
+      { return true; }
+      virtual bool deinit_server_thread()
+      { return true; }
+    };
+    
+    template<class t_connection_context>
+    struct jsonrpc2_server_config
+    {
+      i_jsonrpc2_server_handler<t_connection_context>* m_phandler;
+      critical_section m_lock;
+    };
+    
+    template<class t_connection_context = net_utils::connection_context_base>
+    class jsonrpc2_connection_handler
+    {
+    public:
+      typedef t_connection_context connection_context;
+      typedef jsonrpc2_server_config<t_connection_context> config_type;
+
+      jsonrpc2_connection_handler(i_service_endpoint* psnd_hndlr,
+                                  config_type& config,
+                                  t_connection_context& conn_context)
+        : m_psnd_hndlr(psnd_hndlr),
+          m_config(config),
+          m_conn_context(conn_context),
+          m_is_stop_handling(false)
+      {}
+      virtual ~jsonrpc2_connection_handler()
+      {}
+
+      bool release_protocol()
+      {
+        return true;
+      }
+      virtual bool thread_init()
+      {
+        return true;
+      }
+      virtual bool thread_deinit()
+      {
+        return true;
+      }
+      void handle_qued_callback()   
+      {}
+      bool after_init_connection()
+      {
+        return true;
+      }
+      virtual bool handle_recv(const void* ptr, size_t cb)
+      {
+        std::string buf((const char*)ptr, cb);
+        LOG_PRINT_L0("JSONRPC2_RECV: " << ptr << "\r\n" << buf);
+
+        bool res = handle_buff_in(buf);
+        return res;
+      }
+    private:
+      bool handle_buff_in(std::string& buf)
+      {
+        if(m_cache.size())
+          m_cache += buf;
+        else
+          m_cache.swap(buf);
+
+        m_is_stop_handling = false;
+        while (!m_is_stop_handling) {
+          std::string::size_type pos = match_end_of_request(m_cache);
+          if (std::string::npos == pos) {
+            m_is_stop_handling = true;
+            if (m_cache.size() > 4096) {
+              LOG_ERROR("jsonrpc2_connection_handler::handle_buff_in: Too long request");
+              return false;
+            }
+            break;
+          } else {
+            extract_cached_request_and_handle(pos);
+          }
+
+          if (!m_cache.size()) {
+            m_is_stop_handling = true;
+          }
+        }
+
+        return true;
+      }
+      bool extract_cached_request_and_handle(std::string::size_type pos)
+      {
+        std::string request_data(m_cache.begin(), m_cache.begin() + pos);
+        m_cache.erase(0, pos);
+        return handle_request_and_send_response(request_data);
+      }
+      bool handle_request_and_send_response(const std::string& request_data)
+      {
+        CHECK_AND_ASSERT_MES(m_config.m_phandler, false, "m_config.m_phandler is NULL!!!!");
+        std::string response_data;
+
+        LOG_PRINT_L3("JSONRPC2_REQUEST: >> \r\n" << request_data);
+        bool rpc_result = m_config.m_phandler->handle_rpc_request(request_data, response_data, m_conn_context);
+        LOG_PRINT_L3("JSONRPC2_RESPONSE: << \r\n" << response_data);
+
+        m_psnd_hndlr->do_send((void*)response_data.data(), response_data.size());
+        return rpc_result;
+      }
+      std::string::size_type match_end_of_request(const std::string& buf)
+      {
+        std::string::size_type res = buf.find("\n");
+        if(std::string::npos != res) {
+          return res + 2;
+        }
+        return res;
+      }
+
+    protected:
+      i_service_endpoint* m_psnd_hndlr;
+
+    private:
+      config_type& m_config;
+      t_connection_context& m_conn_context;
+      std::string m_cache;
+      bool m_is_stop_handling;
+    };
+  }
+}
+}
+
+#endif	/* JSONRPC_PROTOCOL_HANDLER_H */
diff --git a/contrib/epee/include/net/jsonrpc_server_handlers_map.h b/contrib/epee/include/net/jsonrpc_server_handlers_map.h
new file mode 100644
index 00000000..8c747d1a
--- /dev/null
+++ b/contrib/epee/include/net/jsonrpc_server_handlers_map.h
@@ -0,0 +1,86 @@
+#ifndef JSONRPC_SERVER_HANDLERS_MAP_H
+#define	JSONRPC_SERVER_HANDLERS_MAP_H
+
+#include <string>
+#include "serialization/keyvalue_serialization.h"
+#include "storages/portable_storage_template_helper.h"
+#include "storages/portable_storage_base.h"
+#include "jsonrpc_structs.h"
+#include "jsonrpc_protocol_handler.h"
+
+#define BEGIN_JSONRPC2_MAP(t_connection_context) \
+bool handle_rpc_request(const std::string& req_data, \
+                        std::string& resp_data, \
+                        t_connection_context& m_conn_context) \
+{ \
+  bool handled = false; \
+  uint64_t ticks = epee::misc_utils::get_tick_count(); \
+  epee::serialization::portable_storage ps; \
+  if (!ps.load_from_json(req_data)) \
+  { \
+    epee::net_utils::jsonrpc2::make_error_resp_json(-32700, "Parse error", resp_data); \
+    return true; \
+  } \
+  epee::serialization::storage_entry id_; \
+  id_ = epee::serialization::storage_entry(std::string()); \
+  if (!ps.get_value("id", id_, nullptr)) \
+  { \
+    epee::net_utils::jsonrpc2::make_error_resp_json(-32600, "Invalid Request", resp_data); \
+    return true; \
+  } \
+  std::string callback_name; \
+  if (!ps.get_value("method", callback_name, nullptr)) \
+  { \
+    epee::net_utils::jsonrpc2::make_error_resp_json(-32600, "Invalid Request", resp_data, id_); \
+    return true; \
+  } \
+  if (false) return true; //just a stub to have "else if"
+
+
+
+#define PREPARE_JSONRPC2_OBJECTS_FROM_JSON(command_type) \
+  handled = true; \
+  boost::value_initialized<epee::json_rpc::request<command_type::request> > req_; \
+  epee::json_rpc::request<command_type::request>& req = static_cast<epee::json_rpc::request<command_type::request>&>(req_);\
+  if(!req.load(ps)) \
+  { \
+    epee::net_utils::jsonrpc2::make_error_resp_json(-32602, "Invalid params", resp_data, req.id); \
+    return true; \
+  } \
+  uint64_t ticks1 = epee::misc_utils::get_tick_count(); \
+  boost::value_initialized<epee::json_rpc::response<command_type::response, epee::json_rpc::dummy_error> > resp_; \
+  epee::json_rpc::response<command_type::response, epee::json_rpc::dummy_error>& resp =  static_cast<epee::json_rpc::response<command_type::response, epee::json_rpc::dummy_error> &>(resp_); \
+  resp.jsonrpc = "2.0"; \
+  resp.id = req.id;
+
+#define FINALIZE_JSONRPC2_OBJECTS_TO_JSON(method_name) \
+  uint64_t ticks2 = epee::misc_utils::get_tick_count(); \
+  epee::serialization::store_t_to_json(resp, resp_data, 0, false); \
+  resp_data += "\n"; \
+  uint64_t ticks3 = epee::misc_utils::get_tick_count(); \
+  LOG_PRINT("[" << method_name << "] processed with " << ticks1-ticks << "/"<< ticks2-ticks1 << "/" << ticks3-ticks2 << "ms", LOG_LEVEL_2);
+
+
+#define MAP_JSONRPC2_WE(method_name, callback_f, command_type) \
+  else if (callback_name == method_name) \
+  { \
+    PREPARE_JSONRPC2_OBJECTS_FROM_JSON(command_type) \
+    epee::json_rpc::error_response fail_resp = AUTO_VAL_INIT(fail_resp); \
+    fail_resp.jsonrpc = "2.0"; \
+    fail_resp.id = req.id; \
+    if(!callback_f(req.params, resp.result, fail_resp.error, m_conn_context)) \
+    { \
+      epee::serialization::store_t_to_json(static_cast<epee::json_rpc::error_response&>(fail_resp), resp_data, 0, false); \
+      resp_data += "\n"; \
+      return true; \
+    } \
+    FINALIZE_JSONRPC2_OBJECTS_TO_JSON(method_name) \
+    return true; \
+  }
+
+#define END_JSONRPC2_MAP() \
+  epee::net_utils::jsonrpc2::make_error_resp_json(-32601, "Method not found", resp_data, id_); \
+  return true; \
+}
+
+#endif	/* JSONRPC_SERVER_HANDLERS_MAP_H */
diff --git a/contrib/epee/include/net/jsonrpc_server_impl_base.h b/contrib/epee/include/net/jsonrpc_server_impl_base.h
new file mode 100644
index 00000000..8a5a9a5b
--- /dev/null
+++ b/contrib/epee/include/net/jsonrpc_server_impl_base.h
@@ -0,0 +1,84 @@
+#ifndef JSONRPC_SERVER_IMPL_BASE_H
+#define	JSONRPC_SERVER_IMPL_BASE_H
+
+#include <boost/thread.hpp>
+#include <boost/bind.hpp> 
+
+#include "net/jsonrpc_protocol_handler.h"
+#include "net/jsonrpc_server_handlers_map.h"
+#include "net/abstract_tcp_server2.h"
+
+namespace epee
+{
+
+template<class t_child_class, class t_connection_context = epee::net_utils::connection_context_base>
+  class jsonrpc_server_impl_base: public net_utils::jsonrpc2::i_jsonrpc2_server_handler<t_connection_context>
+  {
+
+  public:
+    jsonrpc_server_impl_base()
+        : m_net_server()
+    {}
+
+    explicit jsonrpc_server_impl_base(boost::asio::io_service& external_io_service)
+        : m_net_server(external_io_service)
+    {}
+
+    bool init(const std::string& bind_port = "0", const std::string& bind_ip = "0.0.0.0")
+    {
+      //set self as callback handler
+      m_net_server.get_config_object().m_phandler = static_cast<t_child_class*>(this);
+
+      LOG_PRINT_L0("Binding on " << bind_ip << ":" << bind_port);
+      bool res = m_net_server.init_server(bind_port, bind_ip);
+      if (!res)
+      {
+        LOG_ERROR("Failed to bind server");
+        return false;
+      }
+      return true;
+    }
+
+    bool run(size_t threads_count, bool wait = true)
+    {
+      //go to loop
+      LOG_PRINT("Run net_service loop( " << threads_count << " threads)...", LOG_LEVEL_0);
+      if(!m_net_server.run_server(threads_count, wait))
+      {
+        LOG_ERROR("Failed to run net tcp server!");
+      }
+
+      if(wait)
+        LOG_PRINT("net_service loop stopped.", LOG_LEVEL_0);
+      return true;
+    }
+
+    bool deinit()
+    {
+      return m_net_server.deinit_server();
+    }
+
+    bool timed_wait_server_stop(uint64_t ms)
+    {
+      return m_net_server.timed_wait_server_stop(ms);
+    }
+
+    bool send_stop_signal()
+    {
+      m_net_server.send_stop_signal();
+      return true;
+    }
+
+    int get_binded_port()
+    {
+      return m_net_server.get_binded_port();
+    }
+
+  protected: 
+    net_utils::boosted_tcp_server<net_utils::jsonrpc2::jsonrpc2_connection_handler<t_connection_context> > m_net_server;
+  };
+
+}
+
+#endif	/* JSONRPC_SERVER_IMPL_BASE_H */
+
diff --git a/contrib/epee/include/net/jsonrpc_structs.h b/contrib/epee/include/net/jsonrpc_structs.h
new file mode 100644
index 00000000..9df9e259
--- /dev/null
+++ b/contrib/epee/include/net/jsonrpc_structs.h
@@ -0,0 +1,96 @@
+#ifndef JSONRPC_STRUCTS_H
+#define	JSONRPC_STRUCTS_H
+
+#include <string>
+#include <cstdint>
+#include "serialization/keyvalue_serialization.h"
+#include "storages/portable_storage_base.h"
+
+namespace epee 
+{
+  namespace json_rpc
+  {
+    template<typename t_param>
+    struct request
+    {
+      std::string jsonrpc;
+      std::string method;
+      epee::serialization::storage_entry id;
+      t_param     params;
+
+      BEGIN_KV_SERIALIZE_MAP()
+        KV_SERIALIZE(jsonrpc)
+        KV_SERIALIZE(id)
+        KV_SERIALIZE(method)
+        KV_SERIALIZE(params)
+      END_KV_SERIALIZE_MAP()
+    };
+
+    struct error
+    {
+      int64_t code;
+      std::string message;
+      BEGIN_KV_SERIALIZE_MAP()
+        KV_SERIALIZE(code)
+        KV_SERIALIZE(message)
+      END_KV_SERIALIZE_MAP()
+    };
+    
+    struct dummy_error
+    {
+      BEGIN_KV_SERIALIZE_MAP()
+      END_KV_SERIALIZE_MAP()
+    };
+
+    struct dummy_result
+    {
+      BEGIN_KV_SERIALIZE_MAP()
+      END_KV_SERIALIZE_MAP()
+    };
+
+    template<typename t_param, typename t_error>
+    struct response
+    {
+      std::string jsonrpc;
+      t_param     result;
+      epee::serialization::storage_entry id;
+      t_error     error;
+      BEGIN_KV_SERIALIZE_MAP()
+        KV_SERIALIZE(jsonrpc)
+        KV_SERIALIZE(id)
+        KV_SERIALIZE(result)
+        KV_SERIALIZE(error)
+      END_KV_SERIALIZE_MAP()
+    };
+
+    template<typename t_param>
+    struct response<t_param, dummy_error>
+    {
+      std::string jsonrpc;
+      t_param     result;
+      epee::serialization::storage_entry id;
+      BEGIN_KV_SERIALIZE_MAP()
+        KV_SERIALIZE(jsonrpc)
+        KV_SERIALIZE(id)
+        KV_SERIALIZE(result)
+      END_KV_SERIALIZE_MAP()
+    };
+
+    template<typename t_error>
+    struct response<dummy_result, t_error>
+    {
+      std::string jsonrpc;
+      t_error     error;
+      epee::serialization::storage_entry id;
+      BEGIN_KV_SERIALIZE_MAP()
+        KV_SERIALIZE(jsonrpc)
+        KV_SERIALIZE(id)
+        KV_SERIALIZE(error)
+      END_KV_SERIALIZE_MAP()
+    };
+
+    typedef response<dummy_result, error> error_response;
+  }
+}
+
+#endif	/* JSONRPC_STRUCTS_H */
diff --git a/tests/performance_tests/cn_slow_hash.h b/tests/performance_tests/cn_slow_hash.h
new file mode 100644
index 00000000..ec001326
--- /dev/null
+++ b/tests/performance_tests/cn_slow_hash.h
@@ -0,0 +1,45 @@
+// Copyright (c) 2012-2013 The Cryptonote developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#pragma once
+
+#include "crypto/crypto.h"
+#include "cryptonote_core/cryptonote_basic.h"
+
+class test_cn_slow_hash
+{
+public:
+  static const size_t loop_count = 10;
+
+#pragma pack(push, 1)
+  struct data_t
+  {
+    char data[13];
+  };
+#pragma pack(pop)
+
+  static_assert(13 == sizeof(data_t), "Invalid structure size");
+
+  bool init()
+  {
+    if (!epee::string_tools::hex_to_pod("63617665617420656d70746f72", m_data))
+      return false;
+
+    if (!epee::string_tools::hex_to_pod("bbec2cacf69866a8e740380fe7b818fc78f8571221742d729d9d02d7f8989b87", m_expected_hash))
+      return false;
+
+    return true;
+  }
+
+  bool test()
+  {
+    crypto::hash hash;
+    crypto::cn_slow_hash(&m_data, sizeof(m_data), hash);
+    return hash == m_expected_hash;
+  }
+
+private:
+  data_t m_data;
+  crypto::hash m_expected_hash;
+};