diff --git a/client/sign/http.go b/client/sign/http.go
index ecbab360..cbbe40e9 100644
--- a/client/sign/http.go
+++ b/client/sign/http.go
@@ -66,7 +66,7 @@ func init() {
 	}
 }
 
-func containSignPKG(cmd string) bool {
+func ContainSignPKG(cmd string) bool {
 	_, ok := signMap[cmd]
 	return ok
 }
diff --git a/client/sign/sign.go b/client/sign/sign.go
index 026148b3..7129863d 100644
--- a/client/sign/sign.go
+++ b/client/sign/sign.go
@@ -105,7 +105,7 @@ func (c *Client) sortByLatency() {
 }
 
 func (c *Client) Sign(cmd string, seq uint32, data []byte) (*Response, error) {
-	if !containSignPKG(cmd) {
+	if !ContainSignPKG(cmd) {
 		return nil, nil
 	}
 	if time.Now().After(c.lastTestTime.Add(30 * time.Minute)) {
@@ -148,7 +148,7 @@ func (c *Client) test() {
 }
 
 func (i *remote) sign(cmd string, seq uint32, buf []byte, header http.Header) (*Response, error) {
-	if !containSignPKG(cmd) {
+	if !ContainSignPKG(cmd) {
 		return nil, nil
 	}
 	sb := strings.Builder{}