diff --git a/libdap-stream-ch-chain b/libdap-stream-ch-chain
deleted file mode 160000
index 1ffe062f0ae6ba10fe330b025a0a2b899cd03017..0000000000000000000000000000000000000000
--- a/libdap-stream-ch-chain
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 1ffe062f0ae6ba10fe330b025a0a2b899cd03017
diff --git a/libdap-stream-ch-chain/.gitignore b/libdap-stream-ch-chain/.gitignore
new file mode 100755
index 0000000000000000000000000000000000000000..c6127b38c1aa25968a88db3940604d41529e4cf5
--- /dev/null
+++ b/libdap-stream-ch-chain/.gitignore
@@ -0,0 +1,52 @@
+# Prerequisites
+*.d
+
+# Object files
+*.o
+*.ko
+*.obj
+*.elf
+
+# Linker output
+*.ilk
+*.map
+*.exp
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Libraries
+*.lib
+*.a
+*.la
+*.lo
+
+# Shared objects (inc. Windows DLLs)
+*.dll
+*.so
+*.so.*
+*.dylib
+
+# Executables
+*.exe
+*.out
+*.app
+*.i*86
+*.x86_64
+*.hex
+
+# Debug files
+*.dSYM/
+*.su
+*.idb
+*.pdb
+
+# Kernel Module Compile Results
+*.mod*
+*.cmd
+.tmp_versions/
+modules.order
+Module.symvers
+Mkfile.old
+dkms.conf
diff --git a/libdap-stream-ch-chain/CMakeLists.txt b/libdap-stream-ch-chain/CMakeLists.txt
new file mode 100755
index 0000000000000000000000000000000000000000..ff5c4b191a2e6dcdc58c89a0a3c720a3aa2b9a79
--- /dev/null
+++ b/libdap-stream-ch-chain/CMakeLists.txt
@@ -0,0 +1,16 @@
+cmake_minimum_required(VERSION 3.0)
+project (dap_stream_ch_chain)
+  
+set(DAP_STREAM_CH_CHAIN_SRCS dap_stream_ch_chain.c dap_stream_ch_chain_pkt.c)
+
+if(WIN32)
+  include_directories(../3rdparty/wepoll/)
+  include_directories(../3rdparty/uthash/src/)
+endif()
+
+add_library(${PROJECT_NAME} STATIC ${DAP_STREAM_CH_CHAIN_SRCS})
+
+target_link_libraries(dap_stream_ch_chain dap_core dap_crypto dap_chain dap_stream dap_stream_ch)
+
+target_include_directories(dap_stream_ch_chain INTERFACE .)
+
diff --git a/libdap-stream-ch-chain/LICENSE b/libdap-stream-ch-chain/LICENSE
new file mode 100755
index 0000000000000000000000000000000000000000..94a9ed024d3859793618152ea559a168bbcbb5e2
--- /dev/null
+++ b/libdap-stream-ch-chain/LICENSE
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
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+may consider it more useful to permit linking proprietary applications with
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diff --git a/libdap-stream-ch-chain/README.md b/libdap-stream-ch-chain/README.md
new file mode 100755
index 0000000000000000000000000000000000000000..b2a775c28a4b4caa68b4b99bb12e7cd958323007
--- /dev/null
+++ b/libdap-stream-ch-chain/README.md
@@ -0,0 +1,2 @@
+# libdap-stream-ch-chain
+Chains datums and blocks exchamge, service propagation and etc
diff --git a/libdap-stream-ch-chain/dap_stream_ch_chain.c b/libdap-stream-ch-chain/dap_stream_ch_chain.c
new file mode 100644
index 0000000000000000000000000000000000000000..3e789732cd26aab1bb4d610c91c2898e825fd4e1
--- /dev/null
+++ b/libdap-stream-ch-chain/dap_stream_ch_chain.c
@@ -0,0 +1,767 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * Alexander Lysikov <alexander.lysikov@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * Kelvin Project https://github.com/kelvinblockchain
+ * Copyright  (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+ DAP (Deus Applicaions Prototypes) 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.
+
+ DAP 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 any DAP based project.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdint.h>
+
+#ifdef WIN32
+#include <winsock2.h>
+#include <windows.h>
+#include <mswsock.h>
+#include <ws2tcpip.h>
+#include <io.h>
+#include <pthread.h>
+#endif
+
+#include "dap_common.h"
+#include "dap_strfuncs.h"
+#include "dap_list.h"
+#include "dap_config.h"
+#include "dap_hash.h"
+#include "utlist.h"
+
+#include "dap_chain.h"
+#include "dap_chain_datum.h"
+#include "dap_chain_cs.h"
+#include "dap_chain_cell.h"
+
+#include "dap_chain_global_db.h"
+#include "dap_chain_global_db_remote.h"
+
+#include "dap_stream.h"
+#include "dap_stream_ch_pkt.h"
+#include "dap_stream_ch.h"
+#include "dap_stream_ch_proc.h"
+#include "dap_stream_ch_chain.h"
+#include "dap_stream_ch_chain_pkt.h"
+#include "dap_chain_net.h"
+#define LOG_TAG "dap_stream_ch_chain"
+
+static void s_stream_ch_new(dap_stream_ch_t* a_ch, void* a_arg);
+static void s_stream_ch_delete(dap_stream_ch_t* a_ch, void* a_arg);
+static void s_stream_ch_packet_in(dap_stream_ch_t* a_ch, void* a_arg);
+static void s_stream_ch_packet_out(dap_stream_ch_t* a_ch, void* a_arg);
+
+/**
+ * @brief dap_stream_ch_chain_init
+ * @return
+ */
+int dap_stream_ch_chain_init()
+{
+    log_it(L_NOTICE, "Chains and global db exchange channel initialized");
+    dap_stream_ch_proc_add(dap_stream_ch_chain_get_id(), s_stream_ch_new, s_stream_ch_delete, s_stream_ch_packet_in,
+            s_stream_ch_packet_out);
+
+    return 0;
+}
+
+/**
+ * @brief dap_stream_ch_chain_deinit
+ */
+void dap_stream_ch_chain_deinit()
+{
+
+}
+
+/**
+ * @brief s_stream_ch_new
+ * @param a_ch
+ * @param arg
+ */
+void s_stream_ch_new(dap_stream_ch_t* a_ch, void* a_arg)
+{
+    a_ch->internal = DAP_NEW_Z(dap_stream_ch_chain_t);
+    dap_stream_ch_chain_t * l_ch_chain = DAP_STREAM_CH_CHAIN(a_ch);
+    pthread_mutex_init(&l_ch_chain->mutex, NULL);
+    l_ch_chain->ch = a_ch;
+}
+
+/**
+ * @brief s_stream_ch_delete
+ * @param ch
+ * @param arg
+ */
+void s_stream_ch_delete(dap_stream_ch_t* a_ch, void* a_arg)
+{
+    (void) a_arg;
+
+    if(DAP_STREAM_CH_CHAIN(a_ch)->request_global_db_trs) {
+        dap_db_log_list_delete(DAP_STREAM_CH_CHAIN(a_ch)->request_global_db_trs); //dap_list_free_full(DAP_STREAM_CH_CHAIN(a_ch)->request_global_db_trs, (dap_callback_destroyed_t) free);
+        DAP_STREAM_CH_CHAIN(a_ch)->request_global_db_trs = NULL;
+    }
+    pthread_mutex_destroy(&DAP_STREAM_CH_CHAIN(a_ch)->mutex);
+}
+
+/**
+ * @brief s_stream_ch_packet_in
+ * @param a_ch
+ * @param a_arg
+ */
+void s_stream_ch_packet_in(dap_stream_ch_t* a_ch, void* a_arg)
+{
+    //static char *s_net_name = NULL;
+    dap_stream_ch_chain_t * l_ch_chain = DAP_STREAM_CH_CHAIN(a_ch);
+    if(l_ch_chain) {
+        dap_stream_ch_pkt_t * l_ch_pkt = (dap_stream_ch_pkt_t *) a_arg;
+        dap_stream_ch_chain_pkt_t * l_chain_pkt = (dap_stream_ch_chain_pkt_t *) l_ch_pkt->data;
+        size_t l_chain_pkt_data_size = l_ch_pkt->hdr.size - sizeof(l_chain_pkt->hdr);
+        if(l_chain_pkt) {
+            switch (l_ch_pkt->hdr.type) {
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_ALL: {
+                log_it(L_INFO, "In:  SYNCED_ALL pkt");
+            }
+                break;
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB: {
+                log_it(L_INFO, "In:  SYNCED_GLOBAL_DB pkt");
+                /*if(s_net_name) {
+                 DAP_DELETE(s_net_name);
+                 s_net_name = NULL; //"kelvin-testnet"
+                 }*/
+            }
+                break;
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB_GROUP: {
+                log_it(L_INFO, "In:  SYNCED_GLOBAL_DB_GROUP pkt");
+                /*if(s_net_name) {
+                 DAP_DELETE(s_net_name);
+                 s_net_name = NULL; //"kelvin-testnet"
+                 }*/
+            }
+                break;
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_GLOBAL_DB_GROUP: {
+                log_it(L_INFO, "In:  SYNCED_GLOBAL_DB_GROUP pkt");
+            }
+                break;
+
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_CHAINS: {
+                log_it(L_INFO, "In:  SYNCED_CHAINS pkt");
+            }
+                break;
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_CHAINS: {
+                //log_it(L_INFO, "In:  SYNC_CHAINS pkt");
+                dap_chain_t * l_chain = dap_chain_find_by_id(l_chain_pkt->hdr.net_id, l_chain_pkt->hdr.chain_id);
+                if(l_chain) {
+                    if(l_ch_chain->state != CHAIN_STATE_IDLE) {
+                        log_it(L_INFO, "Can't process SYNC_CHAINS request because not in idle state");
+                        dap_stream_ch_chain_pkt_write_error(a_ch, l_chain_pkt->hdr.net_id,
+                                l_chain_pkt->hdr.chain_id, l_chain_pkt->hdr.cell_id,
+                                "ERROR_STATE_NOT_IN_IDLE");
+                    } else {
+                        // fill ids
+                        if(l_chain_pkt_data_size == sizeof(dap_stream_ch_chain_sync_request_t)) {
+                            dap_stream_ch_chain_sync_request_t * l_request =
+                                    (dap_stream_ch_chain_sync_request_t *) l_chain_pkt->data;
+                            memcpy(&l_ch_chain->request, l_request, l_chain_pkt_data_size);
+                            memcpy(&l_ch_chain->request_cell_id, &l_chain_pkt->hdr.cell_id,
+                                    sizeof(dap_chain_cell_id_t));
+                            memcpy(&l_ch_chain->request_net_id, &l_chain_pkt->hdr.net_id, sizeof(dap_chain_net_id_t));
+                            memcpy(&l_ch_chain->request_chain_id, &l_chain_pkt->hdr.chain_id, sizeof(dap_chain_id_t));
+                        }
+
+                        dap_chain_atom_ptr_t * l_lasts = NULL;
+                        size_t l_lasts_size = 0;
+                        dap_chain_atom_iter_t* l_iter = l_chain->callback_atom_iter_create(l_chain);
+                        l_ch_chain->request_atom_iter = l_iter;
+                        l_lasts = l_chain->callback_atom_iter_get_lasts(l_iter, &l_lasts_size);
+                        if(l_lasts) {
+                            for(size_t i = 0; i < l_lasts_size; i++) {
+                                dap_chain_atom_item_t * l_item = NULL;
+                                dap_chain_hash_fast_t l_atom_hash;
+                                dap_hash_fast(l_lasts[i], l_chain->callback_atom_get_size(l_lasts[i]),
+                                        &l_atom_hash);
+                                HASH_FIND(hh, l_ch_chain->request_atoms_lasts, &l_atom_hash, sizeof(l_atom_hash),
+                                        l_item);
+                                if(l_item == NULL) { // Not found, add new lasts
+                                    l_item = DAP_NEW_Z(dap_chain_atom_item_t);
+                                    l_item->atom = l_lasts[i];
+                                    memcpy(&l_item->atom_hash, &l_atom_hash, sizeof(l_atom_hash));
+                                    HASH_ADD(hh, l_ch_chain->request_atoms_lasts, atom_hash, sizeof(l_atom_hash),
+                                            l_item);
+                                }
+                                //else
+                                //    DAP_DELETE(l_lasts[i]);
+                            }
+                            // first packet
+                            l_ch_chain->state = CHAIN_STATE_SYNC_CHAINS;
+                            dap_chain_node_addr_t l_node_addr = { 0 };
+                            dap_chain_net_t *l_net = dap_chain_net_by_id(l_ch_chain->request_net_id);
+                            l_node_addr.uint64 = l_net ? dap_db_get_cur_node_addr(l_net->pub.name) : 0;
+                            dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_CHAIN,
+                                    l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                                    l_ch_chain->request_cell_id, &l_node_addr, sizeof(dap_chain_node_addr_t));
+                        }
+                        else {
+                            // last packet
+                            dap_stream_ch_chain_sync_request_t l_request = { { 0 } };
+                            l_request.id_start = 0;//dap_db_log_get_last_id_remote(l_ch_chain->request.node_addr.uint64);
+                            dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_CHAINS,
+                                    l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                                    l_ch_chain->request_cell_id, &l_request, sizeof(l_request));
+                            l_ch_chain->state = CHAIN_STATE_IDLE;
+                        }
+
+                        DAP_DELETE(l_lasts);
+                        DAP_DELETE(l_iter);
+                    }
+                    dap_stream_ch_set_ready_to_write(a_ch, true);
+                }
+            }
+                break;
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_GLOBAL_DB: {
+                log_it(L_INFO, "In:  SYNC_GLOBAL_DB pkt");
+                if(l_ch_chain->state != CHAIN_STATE_IDLE) {
+                    log_it(L_INFO, "Can't process SYNC_GLOBAL_DB request because not in idle state");
+                    dap_stream_ch_chain_pkt_write_error(a_ch, l_chain_pkt->hdr.net_id,
+                            l_chain_pkt->hdr.chain_id, l_chain_pkt->hdr.cell_id,
+                            "ERROR_STATE_NOT_IN_IDLE");
+                    dap_stream_ch_set_ready_to_write(a_ch, true);
+                    break;
+                }
+                // receive the latest global_db revision of the remote node -> go to send mode
+                if(l_chain_pkt_data_size == sizeof(dap_stream_ch_chain_sync_request_t)) {
+                    dap_stream_ch_chain_sync_request_t * l_request =
+                            (dap_stream_ch_chain_sync_request_t *) l_chain_pkt->data;
+                    memcpy(&l_ch_chain->request, l_request, l_chain_pkt_data_size);
+                    memcpy(&l_ch_chain->request_cell_id, &l_chain_pkt->hdr.cell_id, sizeof(dap_chain_cell_id_t));
+                    memcpy(&l_ch_chain->request_net_id, &l_chain_pkt->hdr.net_id, sizeof(dap_chain_net_id_t));
+                    memcpy(&l_ch_chain->request_chain_id, &l_chain_pkt->hdr.chain_id, sizeof(dap_chain_id_t));
+
+                    // Get log diff
+                    l_ch_chain->request_last_ts = dap_db_log_get_last_id();
+                    //log_it(L_DEBUG, "Requested transactions %llu:%llu", l_request->id_start,
+                    //        (uint64_t ) l_ch_chain->request_last_ts);
+                    //dap_list_t *l_list = dap_db_log_get_list(l_request->id_start + 1);
+                    uint64_t l_start_item = l_request->id_start;
+                    // If the current global_db has been truncated, but the remote node has not known this
+                    if(l_request->id_start > l_ch_chain->request_last_ts) {
+                        l_start_item = 0;
+                    }
+                    dap_chain_net_t *l_net = dap_chain_net_by_id(l_chain_pkt->hdr.net_id);
+                    dap_list_t *l_add_groups = dap_chain_net_get_add_gdb_group(l_net, l_request->node_addr);
+                    dap_db_log_list_t *l_db_log = dap_db_log_list_start(l_start_item + 1, l_add_groups);
+                    if(l_db_log) {
+                        //log_it(L_DEBUG, "Start getting items %u:%u", l_request->id_start + 1,l_db_log->items_number);//dap_list_length(l_list));
+                        // Add it to outgoing list
+                        l_ch_chain->request_global_db_trs = l_db_log;//l_list;
+                        //dap_list_t *l_last = dap_list_last(l_list);
+                        //if(l_last)
+                        //    l_last->next = l_ch_chain->request_global_db_trs;
+                        //l_ch_chain->request_global_db_trs = l_list;
+                        l_ch_chain->state = CHAIN_STATE_SYNC_GLOBAL_DB;
+
+                        dap_chain_node_addr_t l_node_addr = { 0 };
+                        dap_chain_net_t *l_net = dap_chain_net_by_id(l_ch_chain->request_net_id);
+                        l_node_addr.uint64 = l_net ? dap_db_get_cur_node_addr(l_net->pub.name) : 0;
+                        dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_GLOBAL_DB,
+                                l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                                l_ch_chain->request_cell_id, &l_node_addr, sizeof(dap_chain_node_addr_t));
+
+                    } else {
+                        dap_chain_node_addr_t l_node_addr = { 0 };
+                        dap_chain_net_t *l_net = dap_chain_net_by_id(l_ch_chain->request_net_id);
+                        l_node_addr.uint64 = l_net ? dap_db_get_cur_node_addr(l_net->pub.name) : 0;
+                        dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_GLOBAL_DB,
+                                l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                                l_ch_chain->request_cell_id, &l_node_addr, sizeof(dap_chain_node_addr_t));
+
+                        dap_stream_ch_chain_sync_request_t l_request = { { 0 } };
+                        //log_it(L_DEBUG, "No items to sync from %u", l_request->id_start + 1);
+                        l_request.node_addr.uint64 = l_net ? dap_db_get_cur_node_addr(l_net->pub.name) : 0;
+                        l_request.id_start = dap_db_log_get_last_id_remote(l_ch_chain->request.node_addr.uint64);
+                        dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB,
+                                l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                                l_ch_chain->request_cell_id, &l_request, sizeof(l_request));
+//                            dap_stream_ch_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB ,&l_request,
+//                                                    sizeof (l_request));
+                        l_ch_chain->state = CHAIN_STATE_IDLE;
+                        if(l_ch_chain->callback_notify_packet_out)
+                            l_ch_chain->callback_notify_packet_out(l_ch_chain,
+                            DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB,
+                            NULL, 0, l_ch_chain->callback_notify_arg);
+                    }
+                    //log_it(L_INFO, "Prepared %u items for sync", l_db_log->items_number - l_request->id_start);//dap_list_length(l_ch_chain->request_global_db_trs));
+                    // go to send data from list [in s_stream_ch_packet_out()]
+                    // no data to send -> send one empty message DAP_STREAM_CH_CHAIN_PKT_TYPE_GLOBAL_DB_SYNCED
+                    dap_stream_ch_set_ready_to_write(a_ch, true);
+                }
+                else {
+                    log_it(L_ERROR, "Get DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_GLOBAL_DB session_id=%u bad request",
+                            a_ch->stream->session->id);
+                    dap_stream_ch_chain_pkt_write_error(a_ch, l_chain_pkt->hdr.net_id,
+                            l_chain_pkt->hdr.chain_id, l_chain_pkt->hdr.cell_id,
+                            "ERROR_SYNC_GLOBAL_DB_REQUEST_BAD");
+                    dap_stream_ch_set_ready_to_write(a_ch, true);
+                }
+            }
+                break;
+                // first packet of data with source node address
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_CHAIN: {
+                log_it(L_INFO, "In: FIRST_CHAIN data_size=%d", l_chain_pkt_data_size);
+                if(l_chain_pkt_data_size == sizeof(dap_chain_node_addr_t))
+                    memcpy(&l_ch_chain->request.node_addr, l_chain_pkt->data, l_chain_pkt_data_size);
+            }
+                break;
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_CHAIN: {
+                //log_it(L_INFO, "In: CHAIN pkt");
+                dap_chain_t * l_chain = dap_chain_find_by_id(l_chain_pkt->hdr.net_id, l_chain_pkt->hdr.chain_id);
+                if(l_chain) {
+                    // Expect atom element in
+                    if(l_chain_pkt_data_size > 0) {
+                        if(l_chain->callback_atom_add(l_chain, l_chain_pkt->data) == 0 &&
+                                dap_chain_has_file_store(l_chain)) {
+                            // append to file
+                            dap_chain_cell_id_t l_cell_id;
+                            l_cell_id.uint64 = l_chain_pkt->hdr.cell_id.uint64;
+                            dap_chain_cell_t *l_cell = dap_chain_cell_create_fill(l_chain, l_cell_id);
+                            // add one atom only
+                            int l_res = dap_chain_cell_file_append(l_cell, l_chain_pkt->data, l_chain_pkt_data_size);
+                            // rewrite all file
+                            //l_res = dap_chain_cell_file_update(l_cell);
+                            if(!l_cell || l_res < 0) {
+                                log_it(L_ERROR, "Can't save event 0x%x to the file '%s'", l_chain_pkt->data,
+                                        l_cell ? l_cell->file_storage_path : "[null]");
+                            }
+                            // delete cell and close file
+                            dap_chain_cell_delete(l_cell);
+                        }
+                    } else {
+                        log_it(L_WARNING, "Empty chain packet");
+                        dap_stream_ch_chain_pkt_write_error(a_ch, l_chain_pkt->hdr.net_id,
+                                l_chain_pkt->hdr.chain_id, l_chain_pkt->hdr.cell_id,
+                                "ERROR_CHAIN_PACKET_EMPTY");
+                        dap_stream_ch_set_ready_to_write(a_ch, true);
+                    }
+                }
+            }
+                break;
+                // first packet of data with source node address
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_GLOBAL_DB: {
+                log_it(L_INFO, "In: FIRST_GLOBAL_DB data_size=%d", l_chain_pkt_data_size);
+                if(l_chain_pkt_data_size == sizeof(dap_chain_node_addr_t))
+                    memcpy(&l_ch_chain->request.node_addr, l_chain_pkt->data, l_chain_pkt_data_size);
+                //memcpy(&l_ch_chain->request_cell_id, &l_chain_pkt->hdr.cell_id, sizeof(dap_chain_cell_id_t));
+                //memcpy(&l_ch_chain->request_net_id, &l_chain_pkt->hdr.net_id, sizeof(dap_chain_net_id_t));
+                //memcpy(&l_ch_chain->request_chain_id, &l_chain_pkt->hdr.chain_id, sizeof(dap_chain_id_t));
+            }
+                break;
+            case DAP_STREAM_CH_CHAIN_PKT_TYPE_GLOBAL_DB: {
+                //log_it(L_INFO, "In: GLOBAL_DB data_size=%d", l_chain_pkt_data_size);
+                // get transaction and save it to global_db
+                if(l_chain_pkt_data_size > 0) {
+
+                    //session_data_t *l_data = session_data_find(a_ch->stream->session->id);
+                    size_t l_data_obj_count = 0;
+
+                    // deserialize data
+                    dap_store_obj_t *l_store_obj = dap_db_log_unpack((uint8_t*) l_chain_pkt->data,
+                            l_chain_pkt_data_size, &l_data_obj_count); // Parse data from dap_db_log_pack()
+                    //dap_store_obj_t * l_store_obj_reversed = NULL;
+                    //if ( dap_log_level_get()== L_DEBUG  )
+                    //if ( l_data_obj_count && l_store_obj )
+                    //   l_store_obj_reversed = DAP_NEW_Z_SIZE(dap_store_obj_t,l_data_obj_count+1);
+
+
+//                    log_it(L_INFO, "In: l_data_obj_count = %d", l_data_obj_count );
+
+                    for(size_t i = 0; i < l_data_obj_count; i++) {
+                        // timestamp for exist obj
+                        time_t l_timestamp_cur = 0;
+                        // obj to add
+                        dap_store_obj_t* l_obj = l_store_obj + i;
+                        // read item from base;
+                        size_t l_count_read = 0;
+                        dap_store_obj_t *l_read_obj = dap_chain_global_db_driver_read(l_obj->group,
+                                l_obj->key, &l_count_read);
+                        // get timestamp for the exist entry
+                        if(l_read_obj)
+                            l_timestamp_cur = l_read_obj->timestamp;
+                        // get timestamp for the deleted entry
+                        else
+                        {
+                            l_timestamp_cur = global_db_gr_del_get_timestamp(l_obj->group, l_obj->key);
+                        }
+
+                        //check whether to apply the received data into the database
+                        bool l_apply = true;
+                        if(l_obj->timestamp < l_timestamp_cur)
+                            l_apply = false;
+                        else if(l_obj->type == 'd') {
+                            // already deleted
+                            if(!l_read_obj)
+                                l_apply = false;
+                        }
+                        else if(l_obj->type == 'a') {
+                            bool l_is_the_same_present = false;
+                            if(l_read_obj &&
+                                    l_read_obj->value_len == l_obj->value_len &&
+                                    !memcmp(l_read_obj->value, l_obj->value, l_obj->value_len))
+                                l_is_the_same_present = true;
+                            // this data already present in global_db and not obsolete (out of date)
+                            if(l_read_obj && (l_is_the_same_present || l_read_obj->timestamp >= l_store_obj->timestamp))
+                                l_apply = false;
+                        }
+                        if(l_read_obj)
+                            dap_store_obj_free(l_read_obj, l_count_read);
+
+                        if(!l_apply) {
+                            // If request was from defined node_addr we update its state
+                            if(l_ch_chain->request.node_addr.uint64) {
+                                dap_db_log_set_last_id_remote(l_ch_chain->request.node_addr.uint64, l_obj->id);
+                            }
+                            continue;
+                        }
+
+                        char l_ts_str[50];
+                        dap_time_to_str_rfc822(l_ts_str, sizeof(l_ts_str), l_store_obj[i].timestamp);
+                        /*log_it(L_DEBUG, "Unpacked log history: type='%c' (0x%02hhX) group=\"%s\" key=\"%s\""
+                                " timestamp=\"%s\" value_len=%u  ",
+                                (char ) l_store_obj[i].type, l_store_obj[i].type, l_store_obj[i].group,
+                                l_store_obj[i].key,
+                                l_ts_str,
+                                l_store_obj[i].value_len);*/
+
+                        // apply received transaction
+                        dap_chain_t *l_chain = dap_chain_find_by_id(l_chain_pkt->hdr.net_id, l_chain_pkt->hdr.chain_id);
+                        if(l_chain) {
+                            if(l_chain->callback_datums_pool_proc_with_group)
+                                l_chain->callback_datums_pool_proc_with_group(l_chain,
+                                        (dap_chain_datum_t**) &(l_store_obj->value), 1,
+                                        l_store_obj[i].group);
+                        }
+                        /*else {
+                         // read net_name
+                         if(!s_net_name)
+                         {
+                         static dap_config_t *l_cfg = NULL;
+                         if((l_cfg = dap_config_open("network/default")) == NULL) {
+                         log_it(L_ERROR, "Can't open default network config");
+                         } else {
+                         s_net_name = dap_strdup(dap_config_get_item_str(l_cfg, "general", "name"));
+                         dap_config_close(l_cfg);
+                         }
+                         }
+                         // add datum in ledger if necessary
+                         {
+                         dap_chain_net_t *l_net = dap_chain_net_by_name(s_net_name);
+                         dap_chain_t * l_chain;
+                         if(l_net) {
+                         DL_FOREACH(l_net->pub.chains, l_chain)
+                         {
+                         const char *l_chain_name = l_chain->name; //l_chain_name = dap_strdup("gdb");
+                         dap_chain_t *l_chain = dap_chain_net_get_chain_by_name(l_net, l_chain_name);
+                         //const char *l_group_name = "chain-gdb.kelvin-testnet.chain-F00000000000000F";//dap_chain_gdb_get_group(l_chain);
+                         if(l_chain->callback_datums_pool_proc_with_group)
+                         l_chain->callback_datums_pool_proc_with_group(l_chain,
+                         (dap_chain_datum_t**) &(l_store_obj->value), 1,
+                         l_store_obj[i].group);
+                         }
+                         }
+                         }
+                         }*/
+                        // save data to global_db
+                        if(!dap_chain_global_db_obj_save(l_obj, 1)) {
+                            dap_stream_ch_chain_pkt_write_error(a_ch, l_chain_pkt->hdr.net_id,
+                                    l_chain_pkt->hdr.chain_id, l_chain_pkt->hdr.cell_id,
+                                    "ERROR_GLOBAL_DB_INTERNAL_NOT_SAVED");
+                            dap_stream_ch_set_ready_to_write(a_ch, true);
+                        } else {
+                            // If request was from defined node_addr we update its state
+                            if(l_ch_chain->request.node_addr.uint64) {
+                                dap_db_log_set_last_id_remote(l_ch_chain->request.node_addr.uint64,
+                                        l_obj->id);
+                            }
+                            //log_it(L_DEBUG, "Added new GLOBAL_DB history pack");
+                        }
+                    }
+                    if(l_store_obj)
+                        dap_store_obj_free(l_store_obj, l_data_obj_count);
+
+                } else {
+                    log_it(L_WARNING, "Packet with GLOBAL_DB atom has zero body size");
+                }
+            }
+                break;
+                default:{
+                    //log_it(L_INFO, "Get %s packet", c_dap_stream_ch_chain_pkt_type_str[l_ch_pkt->hdr.type]);
+                }
+            }
+            if(l_ch_chain->callback_notify_packet_in)
+                l_ch_chain->callback_notify_packet_in(l_ch_chain, l_ch_pkt->hdr.type, l_chain_pkt,
+                        l_chain_pkt_data_size, //l_ch_pkt->hdr.size,
+                        l_ch_chain->callback_notify_arg);
+        }
+    }
+}
+
+/**
+ * @brief dap_stream_ch_chain_go_idle
+ * @param a_ch_chain
+ */
+void dap_stream_ch_chain_go_idle ( dap_stream_ch_chain_t * a_ch_chain)
+{
+    a_ch_chain->state = CHAIN_STATE_IDLE;
+    //log_it(L_DEBUG, "CHAIN_STATE_IDLE");
+
+    // Cleanup after request
+    memset(&a_ch_chain->request, 0, sizeof(a_ch_chain->request));
+    memset(&a_ch_chain->request_net_id, 0, sizeof(a_ch_chain->request_net_id));
+    memset(&a_ch_chain->request_cell_id, 0, sizeof(a_ch_chain->request_cell_id));
+    memset(&a_ch_chain->request_chain_id, 0, sizeof(a_ch_chain->request_chain_id));
+    memset(&a_ch_chain->request_last_ts, 0, sizeof(a_ch_chain->request_last_ts));
+
+    dap_chain_atom_item_t *l_atom_item = NULL, *l_atom_item_tmp = NULL;
+
+    HASH_ITER( hh,a_ch_chain->request_atoms_lasts, l_atom_item, l_atom_item_tmp)
+        HASH_DEL(a_ch_chain->request_atoms_lasts, l_atom_item);
+
+    HASH_ITER( hh, a_ch_chain->request_atoms_processed, l_atom_item, l_atom_item_tmp )
+        HASH_DEL(a_ch_chain->request_atoms_processed, l_atom_item);
+    dap_stream_ch_set_ready_to_write(a_ch_chain->ch, false);
+
+}
+
+/**
+ * @brief s_stream_ch_packet_out
+ * @param ch
+ * @param arg
+ */
+void s_stream_ch_packet_out(dap_stream_ch_t* a_ch, void* a_arg)
+{
+    (void) a_arg;
+
+    dap_stream_ch_chain_t *l_ch_chain = DAP_STREAM_CH_CHAIN(a_ch);
+
+    //log_it( L_DEBUG,"s_stream_ch_packet_out state=%d", l_ch_chain ? l_ch_chain->state : -1);
+    //  log_it( L_DEBUG,"l_ch_chain %X", l_ch_chain );
+
+    switch (l_ch_chain->state) {
+        case CHAIN_STATE_IDLE: {
+            dap_stream_ch_chain_go_idle(l_ch_chain);
+        } break;
+
+        case CHAIN_STATE_SYNC_ALL:
+
+        case CHAIN_STATE_SYNC_GLOBAL_DB: {
+
+            // Get log diff
+            //size_t l_data_size_out = 0;
+
+            dap_db_log_list_t *l_db_list = l_ch_chain->request_global_db_trs; //dap_list_last( l_ch_chain->request_global_db_trs );
+            dap_global_db_obj_t *l_obj = dap_db_log_list_get(l_db_list);
+
+            if (1) {
+                //dap_list_t *l_list = l_ch_chain->request_global_db_trs; //dap_list_last( l_ch_chain->request_global_db_trs );
+                bool l_is_stop = true; //l_list ? false : true;
+                while(l_obj) {
+
+                    size_t l_items_total = dap_db_log_list_get_count(l_db_list);
+                    size_t l_items_rest = dap_db_log_list_get_count_rest(l_db_list);
+
+                    size_t l_item_size_out = 0;
+                    uint8_t *l_item = dap_db_log_pack(l_obj, &l_item_size_out);
+                    // Item not found, maybe it has deleted? Then go to the next item
+                    if(!l_item || !l_item_size_out) {
+                        //log_it(L_WARNING, "Log pack returned NULL??? data=0x%x (nothing to send) (rest=%d records)", l_obj,
+                         //       l_items_rest);
+                        l_item_size_out = 0;
+                        //dap_stream_ch_set_ready_to_write(a_ch, false);
+
+                        // go to next item
+                        l_obj = dap_db_log_list_get(l_db_list);
+                        //if(l_obj)
+                        //    continue;
+                        // stop global_db sync
+                        //else
+                        //    break;
+                    }
+                    else {
+                        //log_it(L_INFO, "Send one global_db record data=0x%x len=%d (rest=%d/%d items)", l_item, l_item_size_out,
+                        //        l_items_rest, l_items_total);
+                        dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_GLOBAL_DB,
+                                l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                                l_ch_chain->request_cell_id, l_item, l_item_size_out);
+                        l_ch_chain->stats_request_gdb_processed++;
+                        //dap_stream_ch_set_ready_to_write(a_ch, true);
+                        //sleep(1);
+
+                        DAP_DELETE(l_item);
+                        // sent the record, another will be sent
+                        l_is_stop = false;
+                        break;
+                    }
+                    // remove current item from list and go to next item
+                    /*dap_chain_global_db_obj_delete((dap_global_db_obj_t *) l_list->data);
+                    l_ch_chain->request_global_db_trs = dap_list_delete_link(l_ch_chain->request_global_db_trs, l_list);
+                    // nothing was sent
+                    if(!l_item_size_out) {
+                        l_list = l_ch_chain->request_global_db_trs;
+                        // go to next item
+                        if(l_list)
+                            continue;
+                        // stop global_db sync
+                        else
+                            break;
+                    }*/
+                }
+
+                if(l_is_stop){
+                    //log_it(L_DEBUG, "l_obj == 0, STOP");
+                    // If we don't need to send chains after
+//                    if(l_ch_chain->state != CHAIN_STATE_SYNC_ALL){
+//                        dap_stream_ch_chain_go_idle(l_ch_chain);
+//                    }else if(l_ch_chain->state == CHAIN_STATE_SYNC_GLOBAL_DB)
+                    {
+                        // free log list
+                        l_ch_chain->request_global_db_trs = NULL;
+                        dap_db_log_list_delete(l_db_list);
+
+                        // last message
+
+                        dap_stream_ch_chain_sync_request_t l_request = { { 0 } };
+                        dap_chain_net_t *l_net = dap_chain_net_by_id(l_ch_chain->request_net_id);
+                        l_request.node_addr.uint64 = l_net ? dap_db_get_cur_node_addr(l_net->pub.name) : 0;
+                        l_request.id_start = dap_db_log_get_last_id_remote(l_ch_chain->request.node_addr.uint64);
+                        l_request.id_end = 0;
+
+                        log_it( L_DEBUG,"Syncronized database:  last id %llu, items syncronyzed %llu ", l_request.id_start,
+                                l_ch_chain->stats_request_gdb_processed );
+
+                        dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB,
+                                l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                                l_ch_chain->request_cell_id, &l_request, sizeof(l_request));
+
+                        if(l_ch_chain->callback_notify_packet_out)
+                            l_ch_chain->callback_notify_packet_out(l_ch_chain, DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB,
+                            NULL, 0, l_ch_chain->callback_notify_arg);
+
+                        if(l_ch_chain->state != CHAIN_STATE_SYNC_ALL)
+                            dap_stream_ch_chain_go_idle(l_ch_chain);
+                    }
+                }
+            }
+
+        }
+        if(l_ch_chain->state != CHAIN_STATE_SYNC_ALL)
+            break;
+
+            // Synchronize chains
+        case CHAIN_STATE_SYNC_CHAINS: {
+            //log_it(L_DEBUG, "CHAIN_STATE_SYNC_CHAINS");
+            dap_chain_t * l_chain = dap_chain_find_by_id(l_ch_chain->request_net_id, l_ch_chain->request_chain_id);
+            /*
+            // alternative way to get l_chain
+            if(!l_ch_chain->request_atom_iter) {
+                log_it(L_ERROR, "CHAIN_STATE_SYNC_CHAINS not ready to send chains");
+                l_ch_chain->state = CHAIN_STATE_IDLE;
+                break;
+            }
+            //dap_chain_atom_iter_t* l_iter = l_chain->callback_atom_iter_create(l_chain);
+            dap_chain_t * l_chain = l_ch_chain->request_atom_iter->chain;
+            */
+
+            dap_chain_atom_item_t * l_atom_item = NULL, *l_atom_item_tmp = NULL;//, *l_chains_lasts_new = NULL;
+            if(l_ch_chain->request_atoms_lasts == NULL) { // All chains synced
+                dap_stream_ch_chain_sync_request_t l_request = { { 0 } };
+                uint8_t l_send_pkt_type = l_ch_chain->state == CHAIN_STATE_SYNC_CHAINS ?
+                        DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_CHAINS :
+                        DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_ALL;
+                // last message
+                dap_stream_ch_chain_pkt_write(a_ch,
+                        l_send_pkt_type,
+                        l_ch_chain->request_net_id, l_ch_chain->request_chain_id,
+                        l_ch_chain->request_cell_id, &l_request, sizeof(l_request));
+                log_it( L_DEBUG,"Synced: %llu atoms processed",
+                                        l_ch_chain->stats_request_atoms_processed);
+                dap_stream_ch_chain_go_idle(l_ch_chain);
+
+                if(l_ch_chain->callback_notify_packet_out)
+                    l_ch_chain->callback_notify_packet_out(l_ch_chain, l_send_pkt_type, NULL, 0, l_ch_chain->callback_notify_arg);
+            }else{ // Process one chain from l_ch_chain->request_atoms_lasts
+                HASH_ITER(hh,l_ch_chain->request_atoms_lasts, l_atom_item, l_atom_item_tmp) {
+                    dap_chain_atom_item_t * l_atom_item_proc = NULL;
+                    // Check if its processed already
+                    HASH_FIND(hh, l_ch_chain->request_atoms_processed, &l_atom_item->atom_hash,
+                            sizeof(l_atom_item->atom_hash), l_atom_item_proc);
+
+                    if(l_atom_item_proc == NULL) { // If not processed we first store it in special table
+                        l_atom_item_proc = DAP_NEW_Z(dap_chain_atom_item_t);
+                        l_atom_item_proc->atom = l_atom_item->atom;
+                        memcpy(&l_atom_item_proc->atom_hash, &l_atom_item->atom_hash, sizeof(l_atom_item->atom_hash));
+                        HASH_ADD(hh, l_ch_chain->request_atoms_processed, atom_hash, sizeof(l_atom_item->atom_hash),
+                                l_atom_item_proc);
+
+                        // Then flush it out to the remote
+                        size_t l_atom_size = l_chain->callback_atom_get_size(l_atom_item->atom);
+                        dap_stream_ch_chain_pkt_write(a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_CHAIN, l_ch_chain->request_net_id,
+                                l_ch_chain->request_chain_id, l_ch_chain->request_cell_id,
+                                l_atom_item->atom, l_atom_size);
+                        l_ch_chain->stats_request_atoms_processed++;
+                        // Then parse links and populate new lasts
+                        size_t l_lasts_size = 0;
+                        dap_chain_atom_ptr_t * l_links = NULL;
+
+                        dap_chain_atom_iter_t* l_iter = l_chain->callback_atom_iter_create_from(l_chain, l_atom_item->atom);
+                        l_links = l_chain->callback_atom_iter_get_links(l_iter, &l_lasts_size);
+                        //DAP_DELETE(l_atom_item->atom);
+                        DAP_DELETE(l_iter);
+                        //l_links = l_chain->callback_atom_iter_get_links(l_atom_item->atom, &l_lasts_size);
+
+                        for(size_t i = 0; i < l_lasts_size; i++) { // Find links
+                            dap_chain_atom_item_t * l_link_item = NULL;
+                            dap_chain_hash_fast_t l_link_hash;
+                            dap_hash_fast(l_links[i], l_chain->callback_atom_get_size(l_links[i]),
+                                    &l_link_hash);
+                            // Check link in processed atims
+                            HASH_FIND(hh, l_ch_chain->request_atoms_processed, &l_link_hash, sizeof(l_link_hash), l_link_item);
+                            if(l_link_item == NULL) { // Not found, add new lasts
+                                l_link_item = DAP_NEW_Z(dap_chain_atom_item_t);
+                                l_link_item->atom = l_links[i];// do not use memory cause it will be deleted
+                                memcpy(&l_link_item->atom_hash, &l_link_hash, sizeof(l_link_hash));
+                                //HASH_ADD(hh, l_chains_lasts_new, atom_hash, sizeof(l_link_hash), l_link_item);
+                                HASH_ADD(hh, l_ch_chain->request_atoms_lasts, atom_hash, sizeof(l_link_hash), l_link_item);
+                            }
+                            //else
+                            //    DAP_DELETE(l_links[i]);
+                        }
+                        DAP_DELETE(l_links);
+                        HASH_DEL(l_ch_chain->request_atoms_lasts, l_atom_item);
+                        break;
+                    }
+                    else{
+                        HASH_DEL(l_ch_chain->request_atoms_lasts, l_atom_item);
+                    }
+                }
+            }
+            //assert(l_ch_chain->request_atoms_lasts == NULL);
+            //l_ch_chain->request_atoms_lasts = l_chains_lasts_new;
+        }
+        break;
+
+    }
+
+}
diff --git a/libdap-stream-ch-chain/dap_stream_ch_chain.h b/libdap-stream-ch-chain/dap_stream_ch_chain.h
new file mode 100755
index 0000000000000000000000000000000000000000..0e5e6793752fb76e882827b48c986ca4c75ed039
--- /dev/null
+++ b/libdap-stream-ch-chain/dap_stream_ch_chain.h
@@ -0,0 +1,77 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * Kelvin Project https://github.com/kelvinblockchain
+ * Copyright  (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+    DAP (Deus Applicaions Prototypes) 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.
+
+    DAP 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 any DAP based project.  If not, see <http://www.gnu.org/licenses/>.
+**/
+
+#pragma once
+
+#include <pthread.h>
+
+#include "dap_chain_common.h"
+#include "dap_chain.h"
+#include "dap_chain_global_db_hist.h"
+#include "dap_list.h"
+#include "dap_stream_ch_chain_pkt.h"
+#include "uthash.h"
+
+
+typedef struct dap_stream_ch_chain dap_stream_ch_chain_t;
+typedef void (*dap_stream_ch_chain_callback_packet_t)(dap_stream_ch_chain_t*, uint8_t a_pkt_type,
+                                                      dap_stream_ch_chain_pkt_t *a_pkt, size_t a_pkt_data_size,
+                                                      void * a_arg);
+typedef struct dap_chain_atom_item{
+    dap_chain_hash_fast_t atom_hash;
+    dap_chain_atom_ptr_t atom;
+    UT_hash_handle hh;
+} dap_chain_atom_item_t;
+
+typedef struct dap_stream_ch_chain {
+    pthread_mutex_t mutex;
+    dap_stream_ch_t * ch;
+
+    dap_db_log_list_t *request_global_db_trs; // list of transactions
+    dap_stream_ch_chain_state_t state;
+
+    dap_chain_atom_iter_t * request_atom_iter;
+    dap_chain_atom_item_t * request_atoms_lasts;
+    dap_chain_atom_item_t * request_atoms_processed;
+    uint64_t stats_request_atoms_processed;
+    uint64_t stats_request_gdb_processed;
+    dap_stream_ch_chain_sync_request_t request;
+    dap_chain_net_id_t request_net_id;
+    dap_chain_id_t request_chain_id;
+    dap_chain_cell_id_t request_cell_id;
+    time_t request_last_ts;
+
+    dap_stream_ch_chain_callback_packet_t callback_notify_packet_out;
+    dap_stream_ch_chain_callback_packet_t callback_notify_packet_in;
+    void *callback_notify_arg;
+} dap_stream_ch_chain_t;
+
+#define DAP_STREAM_CH_CHAIN(a) ((dap_stream_ch_chain_t *) ((a)->internal) )
+
+
+int dap_stream_ch_chain_init(void);
+void dap_stream_ch_chain_deinit(void);
+
+inline static uint8_t dap_stream_ch_chain_get_id(void) { return (uint8_t) 'C'; }
+void dap_stream_ch_chain_go_idle ( dap_stream_ch_chain_t * a_ch_chain);
diff --git a/libdap-stream-ch-chain/dap_stream_ch_chain_pkt.c b/libdap-stream-ch-chain/dap_stream_ch_chain_pkt.c
new file mode 100755
index 0000000000000000000000000000000000000000..bbb00965cc5b7b69af2f318d515b47b117d37fc5
--- /dev/null
+++ b/libdap-stream-ch-chain/dap_stream_ch_chain_pkt.c
@@ -0,0 +1,69 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#ifdef WIN32
+#include <winsock2.h>
+#include <windows.h>
+#include <mswsock.h>
+#include <ws2tcpip.h>
+#include <io.h>
+#include <pthread.h>
+#endif
+
+#include "dap_stream_ch.h"
+#include "dap_stream_ch_pkt.h"
+#include "dap_stream_ch_chain_pkt.h"
+#include "dap_chain.h"
+
+#define LOG_TAG "dap_stream_ch_chain_pkt"
+
+
+/**
+ * @brief dap_stream_ch_chain_pkt_to_dap_stream_ch_chain_state
+ * @param a_state
+ * @return
+ */
+dap_stream_ch_chain_state_t dap_stream_ch_chain_pkt_type_to_dap_stream_ch_chain_state(char a_state)
+{
+    switch (a_state) {
+    case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_ALL:
+        return CHAIN_STATE_SYNC_ALL;
+    case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB:
+        return CHAIN_STATE_SYNC_GLOBAL_DB;
+    case DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_CHAINS:
+        return CHAIN_STATE_SYNC_CHAINS;
+    }
+    return CHAIN_STATE_IDLE;
+}
+
+/**
+ * @brief dap_stream_ch_net_pkt_write
+ * @param sid
+ * @param data
+ * @param data_size
+ * @return
+ */
+size_t dap_stream_ch_chain_pkt_write(dap_stream_ch_t *a_ch, uint8_t a_type,dap_chain_net_id_t a_net_id,
+                                     dap_chain_id_t a_chain_id, dap_chain_cell_id_t a_cell_id,
+        const void * a_data, size_t a_data_size)
+{
+    dap_stream_ch_chain_pkt_t * l_chain_pkt;
+    size_t l_chain_pkt_size = sizeof (l_chain_pkt->hdr) + a_data_size;
+    l_chain_pkt = DAP_NEW_Z_SIZE(dap_stream_ch_chain_pkt_t, l_chain_pkt_size );
+    l_chain_pkt->hdr.version = 1;
+    l_chain_pkt->hdr.net_id.uint64 = a_net_id.uint64;
+    l_chain_pkt->hdr.cell_id.uint64 = a_cell_id.uint64;
+    l_chain_pkt->hdr.chain_id.uint64 = a_chain_id.uint64;
+
+    if (a_data_size && a_data)
+        memcpy( l_chain_pkt->data, a_data, a_data_size);
+
+    size_t l_ret  = dap_stream_ch_pkt_write(a_ch, a_type , l_chain_pkt, l_chain_pkt_size);
+    DAP_DELETE(l_chain_pkt);
+    return l_ret;
+}
diff --git a/libdap-stream-ch-chain/dap_stream_ch_chain_pkt.h b/libdap-stream-ch-chain/dap_stream_ch_chain_pkt.h
new file mode 100755
index 0000000000000000000000000000000000000000..c0746bfd0230d87bbc68af82bbd776d735322bdc
--- /dev/null
+++ b/libdap-stream-ch-chain/dap_stream_ch_chain_pkt.h
@@ -0,0 +1,106 @@
+/*
+ * Authors:
+ * Dmitriy A. Gearasimov <gerasimov.dmitriy@demlabs.net>
+ * DeM Labs Inc.   https://demlabs.net
+ * Kelvin Project https://github.com/kelvinblockchain
+ * Copyright  (c) 2017-2018
+ * All rights reserved.
+
+ This file is part of DAP (Deus Applications Prototypes) the open source project
+
+    DAP (Deus Applicaions Prototypes) 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.
+
+    DAP 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 any DAP based project.  If not, see <http://www.gnu.org/licenses/>.
+**/
+#pragma once
+
+#include <stdint.h>
+#include <stddef.h>
+#include <string.h>
+
+#include "dap_common.h"
+#include "dap_chain_common.h"
+#include "dap_chain_datum.h"
+#include "dap_chain_cs.h"
+
+#include "dap_stream_ch.h"
+
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_CHAIN                     0x01
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_GLOBAL_DB                 0x11
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_CHAIN               0x20
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_GLOBAL_DB           0x21
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_FIRST_GLOBAL_DB_GROUP     0x31
+
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_CHAINS               0x02
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_GLOBAL_DB            0x12
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_ALL                  0x22
+
+
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_CHAINS             0x03
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB          0x13
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB_GROUP    0x33
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_ALL                0x23
+#define DAP_STREAM_CH_CHAIN_PKT_TYPE_ERROR                     0xff
+
+typedef enum dap_stream_ch_chain_state{
+    CHAIN_STATE_IDLE=0,
+    CHAIN_STATE_SYNC_CHAINS,
+    CHAIN_STATE_SYNC_GLOBAL_DB,
+    CHAIN_STATE_SYNC_ALL,
+} dap_stream_ch_chain_state_t;
+
+typedef struct dap_stream_ch_chain_sync_request{
+    dap_chain_node_addr_t node_addr; // Requesting node's address
+    dap_chain_hash_fast_t hash_from;
+    dap_chain_hash_fast_t hash_to;
+    uint64_t id_start;
+    uint64_t id_end;
+} DAP_ALIGN_PACKED dap_stream_ch_chain_sync_request_t;
+
+
+typedef struct dap_stream_ch_chain_pkt_hdr{
+    uint8_t version;
+    uint8_t padding[7];
+    dap_chain_net_id_t net_id;
+    dap_chain_id_t chain_id;
+    dap_chain_cell_id_t cell_id;
+}  DAP_ALIGN_PACKED dap_stream_ch_chain_pkt_hdr_t;
+
+typedef struct dap_stream_ch_chain_pkt{
+    dap_stream_ch_chain_pkt_hdr_t hdr;
+    uint8_t data[];
+} DAP_ALIGN_PACKED dap_stream_ch_chain_pkt_t;
+
+static const char* c_dap_stream_ch_chain_pkt_type_str[]={
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_CHAIN] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_CHAIN",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_GLOBAL_DB] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_GLOBAL_DB",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_CHAINS] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_CHAINS",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_GLOBAL_DB] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_GLOBAL_DB",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_ALL] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNC_ALL",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_CHAINS] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_CHAINS",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_GLOBAL_DB",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_ALL] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_SYNCED_ALL",
+    [DAP_STREAM_CH_CHAIN_PKT_TYPE_ERROR] = "DAP_STREAM_CH_CHAIN_PKT_TYPE_ERROR"
+
+};
+
+dap_stream_ch_chain_state_t dap_stream_ch_chain_pkt_type_to_dap_stream_ch_chain_state(char a_state);
+
+size_t dap_stream_ch_chain_pkt_write(dap_stream_ch_t *a_ch, uint8_t a_type,dap_chain_net_id_t a_net_id,
+                                     dap_chain_id_t a_chain_id, dap_chain_cell_id_t a_cell_id,
+        const void * a_data, size_t a_data_size);
+
+inline static size_t dap_stream_ch_chain_pkt_write_error(dap_stream_ch_t *a_ch, dap_chain_net_id_t a_net_id,
+                                                  dap_chain_id_t a_chain_id, dap_chain_cell_id_t a_cell_id, const char * a_err_string )
+{
+    return  dap_stream_ch_chain_pkt_write( a_ch, DAP_STREAM_CH_CHAIN_PKT_TYPE_ERROR, a_net_id, a_chain_id, a_cell_id, a_err_string,strlen (a_err_string)+1 );
+}