diff --git a/src/kernel/contract/eventInterface.go b/src/kernel/contract/eventInterface.go
index 41cd04f4..b94fa7d4 100644
--- a/src/kernel/contract/eventInterface.go
+++ b/src/kernel/contract/eventInterface.go
@@ -8,6 +8,8 @@ type EventInterface interface {
 	GetCreateTime() int
 	GetMsgType() string
 	GetEvent() string
+	GetEventKey() string
+	GetTicket() string
 	GetChangeType() string
 	ReadMessage(msg interface{}) error
 	GetContent() []byte
diff --git a/src/kernel/models/callback.go b/src/kernel/models/callback.go
index 01e2f194..ea91a561 100644
--- a/src/kernel/models/callback.go
+++ b/src/kernel/models/callback.go
@@ -34,6 +34,7 @@ type CallbackMessageHeader struct {
 	Event        string   `xml:"Event" json:"Event"`
 	ChangeType   string   `xml:"ChangeType" json:"ChangeType"`
 	EventKey     string   `xml:"EventKey,omitempty" json:"EventKey,omitempty"`
+	Ticket       string   `xml:"Ticket,omitempty" json:"Ticket,omitempty"`
 	Content      []byte
 }
 
@@ -57,6 +58,14 @@ func (header CallbackMessageHeader) GetEvent() string {
 	return header.Event
 }
 
+func (header CallbackMessageHeader) GetEventKey() string {
+	return header.EventKey
+}
+
+func (header CallbackMessageHeader) GetTicket() string {
+	return header.Ticket
+}
+
 func (header CallbackMessageHeader) GetChangeType() string {
 	return header.ChangeType
 }