sending the messages by seqnum

src/client/fix/manager.go

@@ -598,17 +598,29 @@ func (m *Manager) handleRawMessage(direction string, msg *quickfix.Message) {
 	m.messagesMu.Unlock()
 }
 
-// GetAllMessages returns a snapshot of every FIX application message recorded today,
-// sorted ascending by CreatedAt.
-func (m *Manager) GetAllMessages() []domain.Message {
+// GetAllMessages returns today's FIX application messages with MsgSeqNum greater than
+// the caller's last-seen sequence per direction (inSeq for IN, outSeq for OUT), sorted
+// ascending by CreatedAt. Passing 0 for either cursor returns all messages on that side.
+func (m *Manager) GetAllMessages(inSeq, outSeq int) []domain.Message {
 	m.messagesMu.RLock()
-	out := make([]domain.Message, len(m.messages))
-	copy(out, m.messages)
+	filtered := make([]domain.Message, 0, len(m.messages))
+	for _, msg := range m.messages {
+		switch msg.JMessage.Direction {
+		case "IN":
+			if msg.MsgSeqNum > inSeq {
+				filtered = append(filtered, msg)
+			}
+		case "OUT":
+			if msg.MsgSeqNum > outSeq {
+				filtered = append(filtered, msg)
+			}
+		}
+	}
 	m.messagesMu.RUnlock()
 
-	sort.Slice(out, func(i, j int) bool { return out[i].CreatedAt.Before(out[j].CreatedAt) })
+	sort.Slice(filtered, func(i, j int) bool { return filtered[i].CreatedAt.Before(filtered[j].CreatedAt) })
 
-	return out
+	return filtered
 }
 
 // loadTodayMessages rebuilds the in-memory message list from today's rows in the DB.