diff --git a/dap_stream_ch_chain_net.c b/dap_stream_ch_chain_net.c
index 945d57b3696517b6dd6437bed0ae5efbec47a95f..ed11b5bd2279fa03296fb032fdc93ef111c5e079 100644
--- a/dap_stream_ch_chain_net.c
+++ b/dap_stream_ch_chain_net.c
@@ -8,37 +8,157 @@
 
  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 (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.
+ 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/>.
-*/
+ 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 <errno.h>
 #include <string.h>
+#include <pthread.h>
+
 #include "dap_common.h"
+#include "dap_strfuncs.h"
+#include "uthash.h"
 #include "dap_http_client.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_proc.h"
 #include "dap_stream_ch_chain_net_pkt.h"
 #include "dap_stream_ch_chain_net.h"
 
-
 #define LOG_TAG "dap_stream_ch_chain_net"
 
-static void s_stream_ch_new(dap_stream_ch_t* ch , void* arg);
-static void s_stream_ch_delete(dap_stream_ch_t* ch , void* arg);
-static void s_stream_ch_packet_in(dap_stream_ch_t* ch , void* arg);
-static void s_stream_ch_packet_out(dap_stream_ch_t* ch , void* arg);
+static void s_stream_ch_new(dap_stream_ch_t* ch, void* arg);
+static void s_stream_ch_delete(dap_stream_ch_t* ch, void* arg);
+static void s_stream_ch_packet_in(dap_stream_ch_t* ch, void* arg);
+static void s_stream_ch_packet_out(dap_stream_ch_t* ch, void* arg);
+
+typedef struct session_data {
+    unsigned int id;
+    //int sock;
+    int message_id;
+    uint16_t type; // data type
+    time_t timestamp_start;
+    time_t timestamp_cur;
+    dap_list_t *list_tr; // list of transactions
+    dap_chain_node_addr_t node_remote;
+    dap_chain_node_addr_t node_cur;
+
+    UT_hash_handle hh;
+} session_data_t;
+
+typedef struct message_data {
+    time_t timestamp_start;
+    uint64_t addr_from; // node addr
+    uint64_t addr_to; // node addr
+} message_data_t;
+
+// list of active sessions
+static session_data_t *s_chain_net_data = NULL;
+// for separate access to session_data_t
+static pthread_mutex_t s_hash_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+// create packet to send
+uint8_t* dap_stream_ch_chain_net_make_packet(uint64_t a_node_addr_from, uint64_t a_node_addr_to,
+        time_t a_timestamp_start, uint8_t *a_sdata, size_t a_sdata_len, size_t *a_data_len_out)
+{
+    //message_data_t *l_data = DAP_NEW_Z(message_data_t);
+    message_data_t *l_data = DAP_NEW_Z_SIZE(message_data_t, sizeof(message_data_t) + a_sdata_len);
+    l_data->timestamp_start = a_timestamp_start;
+    l_data->addr_from = a_node_addr_from;
+    l_data->addr_to = a_node_addr_to;
+    // copy add data
+    memcpy(l_data + 1, a_sdata, a_sdata_len);
+    *a_data_len_out = sizeof(message_data_t) + a_sdata_len;
+    return (uint8_t*) l_data;
+}
+
+// parse received packet
+static const message_data_t *dap_stream_ch_chain_net_parse_packet(uint8_t* a_data, size_t a_data_len,
+        const uint8_t **a_add_data_out, size_t *a_add_data_len_out)
+{
+    if(a_data_len < sizeof(message_data_t))
+        return NULL;
+    message_data_t *l_data = (message_data_t*) a_data;
+    if(a_add_data_out)
+        *a_add_data_out = (uint8_t*) (l_data + 1);
+    if(a_add_data_len_out)
+        *a_add_data_len_out = a_data_len - sizeof(message_data_t);
+    return l_data;
+}
+
+static void session_data_update(unsigned int a_id, int a_messsage_id, dap_list_t *a_list, message_data_t *a_data,
+        time_t a_timestamp_cur)
+{
+    session_data_t *l_sdata;
+    pthread_mutex_lock(&s_hash_mutex);
+    HASH_FIND_INT(s_chain_net_data, &a_id, l_sdata);
+    if(l_sdata == NULL) {
+        l_sdata = DAP_NEW_Z(session_data_t);
+        l_sdata->id = a_id;
+        HASH_ADD_INT(s_chain_net_data, id, l_sdata);
+    }
+    if(a_messsage_id != -1)
+        l_sdata->message_id = a_messsage_id;
+
+    l_sdata->list_tr = a_list;
+
+    if(a_data) {
+        l_sdata->timestamp_start = a_data->timestamp_start;
+        l_sdata->node_remote.uint64 = a_data->addr_from;
+        l_sdata->node_cur.uint64 = a_data->addr_to;
+    }
+    if(a_timestamp_cur != (time_t) -1) {
+        l_sdata->timestamp_cur = a_timestamp_cur;
+    }
+
+    pthread_mutex_unlock(&s_hash_mutex);
+}
+
+static session_data_t* session_data_find(unsigned int a_id)
+{
+    session_data_t *l_sdata;
+    pthread_mutex_lock(&s_hash_mutex);
+    HASH_FIND_INT(s_chain_net_data, &a_id, l_sdata);
+    pthread_mutex_unlock(&s_hash_mutex);
+    return l_sdata;
+}
+
+static void session_data_del(unsigned int a_id)
+{
+    session_data_t *l_sdata;
+    pthread_mutex_lock(&s_hash_mutex);
+    HASH_FIND_INT(s_chain_net_data, &a_id, l_sdata);
+    if(l_sdata) {
+        DAP_DELETE(l_sdata);
+        HASH_DEL(s_chain_net_data, l_sdata);
+    }
+    pthread_mutex_unlock(&s_hash_mutex);
+}
+
+static void session_data_del_all()
+{
+    session_data_t *l_sdata, *l_sdata_tmp;
+    pthread_mutex_lock(&s_hash_mutex);
+    HASH_ITER(hh, s_chain_net_data , l_sdata, l_sdata_tmp)
+    {
+        DAP_DELETE(l_sdata);
+        HASH_DEL(s_chain_net_data, l_sdata);
+    }
+    pthread_mutex_unlock(&s_hash_mutex);
+}
 
 uint8_t dap_stream_ch_chain_net_get_id()
 {
@@ -63,7 +183,8 @@ int dap_stream_ch_chain_net_init()
  */
 void dap_stream_ch_chain_net_deinit()
 {
-
+    //printf("* del all sessions\n");
+    session_data_del_all();
 }
 
 /**
@@ -71,26 +192,28 @@ void dap_stream_ch_chain_net_deinit()
  * @param a_ch
  * @param arg
  */
-void s_stream_ch_new(dap_stream_ch_t* a_ch , void* 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_net_t);
+    a_ch->internal = DAP_NEW_Z(dap_stream_ch_chain_net_t);
     dap_stream_ch_chain_net_t * l_ch_chain_net = DAP_STREAM_CH_CHAIN_NET(a_ch);
-    pthread_mutex_init( &l_ch_chain_net->mutex,NULL);
+    l_ch_chain_net->ch = a_ch;
+    pthread_mutex_init(&l_ch_chain_net->mutex, NULL);
 }
 
-
 /**
  * @brief s_stream_ch_delete
  * @param ch
  * @param arg
  */
-void s_stream_ch_delete(dap_stream_ch_t* ch , void* arg)
+void s_stream_ch_delete(dap_stream_ch_t* a_ch, void* a_arg)
 {
-
+    //printf("* del session=%d\n", a_ch->stream->session->id);
+    dap_stream_ch_chain_net_t * l_ch_chain_net = DAP_STREAM_CH_CHAIN_NET(a_ch);
+    pthread_mutex_lock(&l_ch_chain_net->mutex);
+    session_data_del(a_ch->stream->session->id);
+    pthread_mutex_unlock(&l_ch_chain_net->mutex);
 }
 
-static int debug_count = 0;
-
 /**
  * @brief s_stream_ch_packet_in
  * @param ch
@@ -98,14 +221,16 @@ static int debug_count = 0;
  */
 void s_stream_ch_packet_in(dap_stream_ch_t* a_ch, void* a_arg)
 {
-    dap_stream_ch_chain_net_t * l_ch_chain = DAP_STREAM_CH_CHAIN_NET(a_ch);
-    if(l_ch_chain) {
+    dap_stream_ch_chain_net_t * l_ch_chain_net = DAP_STREAM_CH_CHAIN_NET(a_ch);
+    if(l_ch_chain_net) {
+        pthread_mutex_lock(&l_ch_chain_net->mutex);
         dap_stream_ch_pkt_t *l_ch_pkt = (dap_stream_ch_pkt_t *) a_arg;
         dap_stream_ch_chain_net_pkt_t *l_chain_pkt = (dap_stream_ch_chain_net_pkt_t *) l_ch_pkt->data;
         if(l_chain_pkt) {
-            size_t data_size = l_ch_pkt->hdr.size - sizeof(dap_stream_ch_chain_net_pkt_hdr_t);
-            printf("*packet TYPE=%d data_size=%d in=%s\n", l_chain_pkt->hdr.type, data_size,
-                    (data_size > 0) ? (char*) (l_chain_pkt->data) : "-");
+
+            size_t l_ch_pkt_data_size = l_ch_pkt->hdr.size - sizeof(dap_stream_ch_chain_net_pkt_hdr_t);
+            //printf("*packet TYPE=%d data_size=%d\n", l_chain_pkt->hdr.type, l_ch_pkt_data_size);
+            //(data_size > 0) ? (char*) (l_chain_pkt->data) : "-");
 
             switch (l_chain_pkt->hdr.type) {
             case STREAM_CH_CHAIN_NET_PKT_TYPE_DBG: {
@@ -113,31 +238,152 @@ void s_stream_ch_packet_in(dap_stream_ch_t* a_ch, void* a_arg)
                 dap_stream_ch_set_ready_to_write(a_ch, true);
             }
                 break;
+                // received ping request - > send pong request
             case STREAM_CH_CHAIN_NET_PKT_TYPE_PING: {
-                log_it(L_INFO,"Get STREAM_CH_CHAIN_NET_PKT_TYPE_PING");
+                log_it(L_INFO, "Get STREAM_CH_CHAIN_NET_PKT_TYPE_PING");
                 int l_res = dap_stream_ch_chain_net_pkt_write(a_ch, STREAM_CH_CHAIN_NET_PKT_TYPE_PONG, NULL, 0);
                 dap_stream_ch_set_ready_to_write(a_ch, true);
             }
                 break;
+                // receive pong request -> send nothing
             case STREAM_CH_CHAIN_NET_PKT_TYPE_PONG: {
-                log_it(L_INFO,"Get STREAM_CH_CHAIN_NET_PKT_TYPE_PONG");
+                log_it(L_INFO, "Get STREAM_CH_CHAIN_NET_PKT_TYPE_PONG");
+                dap_stream_ch_set_ready_to_write(a_ch, false);
+            }
+                break;
+                // get node address
+            case STREAM_CH_CHAIN_NET_PKT_TYPE_GET_NODE_ADDR: {
+                log_it(L_INFO, "Get STREAM_CH_CHAIN_NET_PKT_TYPE_GET_NODE_ADDR");
                 dap_stream_ch_set_ready_to_write(a_ch, false);
+            }
+                break;
+                // set new node address
+            case STREAM_CH_CHAIN_NET_PKT_TYPE_SET_NODE_ADDR: {
+                log_it(L_INFO, "Get STREAM_CH_CHAIN_NET_PKT_TYPE_SET_NODE_ADDR");
+                {
+                    uint64_t l_addr = 0;
+                    // set cur node addr
+                    if(l_ch_pkt_data_size == sizeof(uint64_t)) {
+                        memcpy(&l_addr, l_chain_pkt->data, sizeof(uint64_t));
+                        dap_db_set_cur_node_addr(l_addr);
+                    }
+                }
+                session_data_update(a_ch->stream->session->id, STREAM_CH_CHAIN_NET_PKT_TYPE_SET_NODE_ADDR,
+                NULL, NULL, -1);
+                dap_stream_ch_set_ready_to_write(a_ch, true);
             }
                 break;
             case STREAM_CH_CHAIN_NET_PKT_TYPE_GLOVAL_DB: {
+                log_it(L_INFO, "Get STREAM_CH_CHAIN_NET_PKT_TYPE_GLOVAL_DB data_size=%d", l_ch_pkt_data_size);
+                // get transaction and save it to global_db
+                if(l_ch_pkt_data_size > 0) {
+
+                    // parse received packet
+                    size_t l_data_size = 0;
+                    const uint8_t *l_data = NULL;
+                    const message_data_t *l_mdata = dap_stream_ch_chain_net_parse_packet(l_chain_pkt->data,
+                            l_ch_pkt_data_size,
+                            &l_data, &l_data_size);
+
+                    /*dap_chain_node_addr_t l_node_cur;
+                     dap_chain_node_addr_t l_node_remote;
+                     uint8_t *l_recv_data = l_chain_pkt->data; //DAP_NEW_SIZE(uint8_t, l_item_size_out + 2 * sizeof(dap_chain_node_addr_t));
+                     memcpy(&l_node_remote, l_recv_data, sizeof(dap_chain_node_addr_t));
+                     memcpy(&l_node_cur, l_recv_data + sizeof(dap_chain_node_addr_t), sizeof(dap_chain_node_addr_t));
+                     uint8_t *l_mdata = l_recv_data + 2 * sizeof(dap_chain_node_addr_t);
+                     l_ch_pkt_data_size -= 2 * sizeof(dap_chain_node_addr_t);*/
+
+                    if(l_data && l_data_size > 0) {
+                        //session_data_t *l_data = session_data_find(a_ch->stream->session->id);
+                        int l_data_obj_count = 0;
+
+                        // deserialize data
+                        void *l_data_obj = dap_db_log_unpack((uint8_t*) l_data, l_data_size, &l_data_obj_count); // Parse data from dap_db_log_pack()
+                        // save data to global_db
+                        if(!dap_chain_global_db_obj_save(l_data_obj, l_data_obj_count)) {
+                            log_it(L_ERROR, "Don't saved to global_db objs=0x%x count=%d", l_data_obj,
+                                    l_data_obj_count);
+                        }
+                        else {
+                            // Get remote timestamp
+                            time_t l_timestamp_remote = dap_db_log_unpack_get_timestamp((uint8_t*) l_data, l_data_size);
+                            // set new timestamp (saved data) for remote node
+                            dap_db_log_set_last_timestamp_remote(l_mdata->addr_from, l_timestamp_remote);
+                            //printf("***ts=%llu\n", l_timestamp_remote);
+                        }
+                    }
+                    dap_stream_ch_set_ready_to_write(a_ch, false);
+
+                }
+
+                /*// go to data transfer mode
+                 else if(!data_size) {
+
+                 dap_stream_ch_set_ready_to_write(a_ch, false);
+                 // Get log diff
+                 //dap_list_t *l_list = dap_db_log_get_list(a_data->timestamp_start);
+                 //session_data_update(a_ch->stream->session->id, l_list, a_data, 0);
+
+                 }*/
             }
                 break;
+                // receive the latest global_db revision of the remote node -> go to send mode
             case STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC: {
-                // должен сообщать последнюю ревизию global_db у ноды-клиента,
-                // чем инициировать у ноды-сервера процесс отправки транзиция
+
+                if(l_ch_pkt_data_size == sizeof(message_data_t)) {
+
+                    // parse received packet
+                    const message_data_t *l_data = dap_stream_ch_chain_net_parse_packet(l_chain_pkt->data,
+                            l_ch_pkt_data_size,
+                            NULL, NULL);
+                    if(l_data) {
+                        //message_data_t *l_data = (message_data_t*) l_chain_pkt->data;
+
+                        //time_t l_timestamp_remote_get = l_data->timestamp_start;
+                        //time_t l_timestamp_remote_cur = dap_db_log_get_last_timestamp_remote(l_data->addr_from);
+
+                        // last timestamp for remote node
+                        time_t l_timestamp_remote_saved = l_data->timestamp_start; //min(l_timestamp_remote_get, l_timestamp_remote_cur);
+
+                        // Get log diff
+                        dap_list_t *l_list = dap_db_log_get_list(l_timestamp_remote_saved);
+                        session_data_update(a_ch->stream->session->id,
+                        STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC,
+                                l_list, (message_data_t*) l_data, -1);
+
+                        log_it(L_INFO,
+                                "Get STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC session_id=%u from 0x%llx to 0x%llx count=%d",
+                                a_ch->stream->session->id, l_data->addr_from, l_data->addr_to, dap_list_length(l_list));
+                    }
+                    // go to send data from list [in s_stream_ch_packet_out()]
+                    // no data to send -> send one empty message STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC
+                    dap_stream_ch_set_ready_to_write(a_ch, true);
+                }
+                else {
+                    log_it(L_ERROR, "Get STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC session_id=%u bad request",
+                            a_ch->stream->session->id);
+                    dap_stream_ch_set_ready_to_write(a_ch, false);
+                }
             }
                 break;
             }
-            if(l_ch_chain->notify_callback)
-                l_ch_chain->notify_callback(l_chain_pkt, l_ch_chain->notify_callback_arg);
+            if(l_ch_chain_net->notify_callback) {
+                if(l_chain_pkt->hdr.type == STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC) {
+                    session_data_t *l_data = session_data_find(a_ch->stream->session->id);
+                    // end of session
+                    if(!l_data->list_tr)
+                        l_ch_chain_net->notify_callback(NULL, l_ch_pkt_data_size, l_ch_chain_net->notify_callback_arg);
+                    else
+                        l_ch_chain_net->notify_callback(l_chain_pkt, l_ch_pkt_data_size,
+                                l_ch_chain_net->notify_callback_arg);
+                }
+                else
+                    l_ch_chain_net->notify_callback(l_chain_pkt, l_ch_pkt_data_size,
+                            l_ch_chain_net->notify_callback_arg);
+            }
         }
+        pthread_mutex_unlock(&l_ch_chain_net->mutex);
     }
-    debug_count++;
 }
 
 /**
@@ -147,6 +393,89 @@ void s_stream_ch_packet_in(dap_stream_ch_t* a_ch, void* a_arg)
  */
 void s_stream_ch_packet_out(dap_stream_ch_t* a_ch, void* a_arg)
 {
-    printf("*packet out count=%d\n", debug_count);
-    dap_stream_ch_set_ready_to_write(a_ch, false);
+    dap_stream_ch_chain_net_t * l_ch_chain_net = DAP_STREAM_CH_CHAIN_NET(a_ch);
+    pthread_mutex_lock(&l_ch_chain_net->mutex);
+
+    session_data_t *l_data = session_data_find(a_ch->stream->session->id);
+    //printf("*packet out session_id=%u\n", a_ch->stream->session->id);
+    if(!l_data) {
+        log_it(L_WARNING, "if packet_out() l_data=NULL");
+        dap_stream_ch_set_ready_to_write(a_ch, false);
+        return;
+    }
+
+    if(l_data->message_id == STREAM_CH_CHAIN_NET_PKT_TYPE_SET_NODE_ADDR) {
+        // get cur node addr
+        uint64_t l_addr = dap_db_get_cur_node_addr();
+        size_t l_send_data_len = sizeof(uint64_t);
+        // send cur node addr
+        dap_stream_ch_chain_net_pkt_write(a_ch, STREAM_CH_CHAIN_NET_PKT_TYPE_GET_NODE_ADDR, &l_addr, l_send_data_len);
+
+        pthread_mutex_unlock(&l_ch_chain_net->mutex);
+        dap_stream_ch_set_ready_to_write(a_ch, false);
+        return;
+    }
+
+    dap_chain_node_addr_t node_cur;
+
+    // Get log diff
+    size_t l_data_size_out = 0;
+    dap_list_t *l_list = l_data->list_tr;
+    int len = dap_list_length(l_list);
+    //printf("*len=%d\n", len);
+    if(l_list) {
+        int l_item_size_out = 0;
+        uint8_t *l_item = NULL;
+        while(l_list && !l_item) {
+            l_item = dap_db_log_pack((dap_global_db_obj_t *) l_list->data, &l_item_size_out);
+            if(!l_item) {
+                // remove current item from list
+                dap_chain_global_db_obj_delete((dap_global_db_obj_t *) l_list->data);
+                l_list = dap_list_delete_link(l_list, l_list);
+            }
+        }
+
+        size_t l_send_data_len = 0;
+        uint8_t *l_send_data = dap_stream_ch_chain_net_make_packet(l_data->node_cur.uint64, l_data->node_remote.uint64,
+                0, l_item, l_item_size_out, &l_send_data_len);
+
+        dap_stream_ch_chain_net_pkt_write(a_ch, STREAM_CH_CHAIN_NET_PKT_TYPE_GLOVAL_DB, l_send_data, l_send_data_len);
+        DAP_DELETE(l_send_data);
+
+        // remove current item from list
+        dap_chain_global_db_obj_delete((dap_global_db_obj_t *) l_list->data);
+
+        l_list = dap_list_delete_link(l_list, l_list);
+
+        session_data_update(a_ch->stream->session->id, -1, l_list, NULL, -1);
+    }
+    // last message
+    if(!l_list) {
+        // send request
+        size_t l_data_size_out = 0;
+        // Get current last timestamp in log
+        //time_t l_timestamp_remote_saved = dap_db_log_get_last_timestamp();
+
+        // get remote last timestamp (saved data) for remote node
+        time_t l_timestamp_remote_saved = dap_db_log_get_last_timestamp_remote(l_data->node_remote.uint64);
+
+        size_t l_data_send_len = 0;
+        uint8_t *l_data_send = dap_stream_ch_chain_net_make_packet(l_data->node_cur.uint64, l_data->node_remote.uint64,
+                l_timestamp_remote_saved, NULL, 0, &l_data_send_len);
+
+        dap_stream_ch_chain_net_pkt_write(a_ch, STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC, l_data_send,
+                l_data_send_len);
+        DAP_DELETE(l_data_send);
+
+        l_data = NULL;
+    }
+    int l_res = 0;
+
+    // end of session
+    if(!l_list)
+        dap_stream_ch_set_ready_to_write(a_ch, false);
+    else
+        dap_stream_ch_set_ready_to_write(a_ch, true);
+
+    pthread_mutex_unlock(&l_ch_chain_net->mutex);
 }
diff --git a/dap_stream_ch_chain_net.h b/dap_stream_ch_chain_net.h
index cc87bd3417a8f9fb17bbe7e3a3fbf1cc551b80aa..9279034d2882864ca1da925a0a81667f6e5c17b8 100644
--- a/dap_stream_ch_chain_net.h
+++ b/dap_stream_ch_chain_net.h
@@ -28,16 +28,19 @@
 #include <stdint.h>
 #include "dap_stream_ch_chain_net_pkt.h"
 
-typedef void (*dap_stream_ch_chain_net_callback_t)(dap_stream_ch_chain_net_pkt_t*, void*);
+typedef void (*dap_stream_ch_chain_net_callback_t)(dap_stream_ch_chain_net_pkt_t *a_pkt, size_t a_pkt_data_size, void *arg);
 
 typedef struct dap_stream_ch_chain_net {
     pthread_mutex_t mutex;
     dap_stream_ch_chain_net_callback_t notify_callback;
+    dap_stream_ch_t *ch;
     void *notify_callback_arg;
 } dap_stream_ch_chain_net_t;
 
 #define DAP_STREAM_CH_CHAIN_NET(a) ((dap_stream_ch_chain_net_t *) ((a)->internal) )
 
 uint8_t dap_stream_ch_chain_net_get_id();
+uint8_t* dap_stream_ch_chain_net_make_packet(uint64_t a_node_addr_from, uint64_t a_node_addr_to,
+        time_t a_timestamp_start, uint8_t *a_sdata, size_t a_sdata_len, size_t *a_data_len_out);
 int dap_stream_ch_chain_net_init();
 void dap_stream_ch_chain_net_deinit();
diff --git a/dap_stream_ch_chain_net_pkt.h b/dap_stream_ch_chain_net_pkt.h
index 78b4246fe5cb4b36ab4f244fd0c11404e6c6c388..b05ebd45e6f532bbf1a48b024ce4601293aaeec7 100644
--- a/dap_stream_ch_chain_net_pkt.h
+++ b/dap_stream_ch_chain_net_pkt.h
@@ -37,6 +37,8 @@
 #define STREAM_CH_CHAIN_NET_PKT_TYPE_DATUM                  0x12
 #define STREAM_CH_CHAIN_NET_PKT_TYPE_GLOVAL_DB              0x13
 #define STREAM_CH_CHAIN_NET_PKT_TYPE_GLOBAL_DB_REQUEST_SYNC 0x14
+#define STREAM_CH_CHAIN_NET_PKT_TYPE_GET_NODE_ADDR          0x15
+#define STREAM_CH_CHAIN_NET_PKT_TYPE_SET_NODE_ADDR          0x16
 #define STREAM_CH_CHAIN_NET_PKT_TYPE_DBG                    0x99
 
 typedef struct stream_ch_chain_net_pkt_hdr{