diff --git a/tools/chatgui/db/db_manager.cpp b/tools/chatgui/db/db_manager.cpp
index 88bdf588..49fd748c 100644
--- a/tools/chatgui/db/db_manager.cpp
+++ b/tools/chatgui/db/db_manager.cpp
@@ -6,18 +6,13 @@
 #include <cstring>
 #include <QSet>
 #include <QElapsedTimer>
+#include <QJsonDocument>
+#include <QJsonObject>
 
 /* ── helpers ── */
 
 static QByteArray parseJsonField(const QByteArray& json, const char* key) {
-    QByteArray pat = "\"" + QByteArray(key) + "\":\"";
-    int idx = json.indexOf(pat);
-    if (idx < 0) return {};
-    idx += pat.size();
-    int end = idx;
-    while (end < json.size() && !(json[end] == '"' && (end == idx || json[end - 1] != '\\'))) end++;
-    if (end > idx) return QByteArray(json.constData() + idx, end - idx);
-    return {};
+    return QJsonDocument::fromJson(json).object().value(QString::fromLatin1(key)).toString().toUtf8();
 }
 
 QString DbManager::sanitizeTableName(const QString& chId) {
@@ -239,7 +234,7 @@ QString DbManager::getChannelLastMessage(const QString& channelId) const {
 QList<MessageRow> DbManager::getMessages(const QString& chId, int limit) const {
     QList<MessageRow> list;
     QString sql = QStringLiteral(
-        "SELECT id, node_id, data, timestamp, chain_hash, author_signature, local_attrs"
+        "SELECT id, node_id, data, timestamp, chain_hash, author_signature, local_attrs, message_id"
         " FROM \"%1\" ORDER BY timestamp DESC, author_signature DESC LIMIT ?").arg(msgTableName(chId));
     sqlite3_stmt* stmt = prepareOrNull(sql.toUtf8().constData());
     if (!stmt) return list;
@@ -259,6 +254,7 @@ QList<MessageRow> DbManager::getMessages(const QString& chId, int limit) const {
         m.datahash     = 0;
         m.chainHash    = colBlob(stmt, 4);
         m.signature    = colBlob(stmt, 5);
+        m.messageId    = colBlob(stmt, 7);
         m.localAttrs   = QByteArray((const char*)sqlite3_column_text(stmt, 6));
         m.isOutgoing   = (m.authorNodeId == myId);
         m.isRead       = true;
@@ -271,7 +267,7 @@ QList<MessageRow> DbManager::getMessages(const QString& chId, int limit) const {
 QList<MessageRow> DbManager::getMessagesSince(const QString& chId, qint64 sinceId) const {
     QList<MessageRow> list;
     QString sql = QStringLiteral(
-        "SELECT id, node_id, data, timestamp, chain_hash, author_signature, local_attrs"
+        "SELECT id, node_id, data, timestamp, chain_hash, author_signature, local_attrs, message_id"
         " FROM \"%1\" WHERE id > ? ORDER BY id ASC").arg(msgTableName(chId));
     sqlite3_stmt* stmt = prepareOrNull(sql.toUtf8().constData());
     if (!stmt) return list;
@@ -289,6 +285,7 @@ QList<MessageRow> DbManager::getMessagesSince(const QString& chId, qint64 sinceI
         m.datahash     = 0;
         m.chainHash    = colBlob(stmt, 4);
         m.signature    = colBlob(stmt, 5);
+        m.messageId    = colBlob(stmt, 7);
         m.localAttrs   = QByteArray((const char*)sqlite3_column_text(stmt, 6));
         m.isOutgoing   = (m.authorNodeId == myId);
         m.isRead       = true;
@@ -301,7 +298,7 @@ QList<MessageRow> DbManager::getMessagesSince(const QString& chId, qint64 sinceI
 MessageRow DbManager::getMessageById(const QString& chId, qint64 msgId) const {
     MessageRow m;
     QString sql = QStringLiteral(
-        "SELECT id, node_id, data, timestamp, chain_hash, author_signature, local_attrs"
+        "SELECT id, node_id, data, timestamp, chain_hash, author_signature, local_attrs, message_id"
         " FROM \"%1\" WHERE id = ?").arg(msgTableName(chId));
     sqlite3_stmt* stmt = prepareOrNull(sql.toUtf8().constData());
     if (!stmt) return m;
@@ -317,6 +314,7 @@ MessageRow DbManager::getMessageById(const QString& chId, qint64 msgId) const {
         m.datahash     = 0;
         m.chainHash    = colBlob(stmt, 4);
         m.signature    = colBlob(stmt, 5);
+        m.messageId    = colBlob(stmt, 7);
         m.localAttrs   = QByteArray((const char*)sqlite3_column_text(stmt, 6));
         m.isOutgoing   = (m.authorNodeId == m_myNodeId);
         m.isRead       = true;
diff --git a/tools/chatgui/db/db_manager.h b/tools/chatgui/db/db_manager.h
index 5153e7f7..8bb2b09e 100644
--- a/tools/chatgui/db/db_manager.h
+++ b/tools/chatgui/db/db_manager.h
@@ -42,6 +42,7 @@ struct MessageRow {
     uint64_t   datahash = 0;
     QByteArray chainHash;
     QByteArray signature;
+    QByteArray messageId;               // общий ID подписанного сообщения, 32 байта
     QByteArray localAttrs;
     bool       isOutgoing = false;
     bool       isRead = false;