diff --git a/nodeconf/config.go b/nodeconf/config.go
index 17093019..da92d943 100644
--- a/nodeconf/config.go
+++ b/nodeconf/config.go
@@ -10,7 +10,7 @@ const (
 	NodeTypeCoordinator NodeType = "coordinator"
 )
 
-type configGetter interface {
+type ConfigGetter interface {
 	GetNodes() []NodeConfig
 }
 
diff --git a/nodeconf/service.go b/nodeconf/service.go
index 9b242a0f..473d9df5 100644
--- a/nodeconf/service.go
+++ b/nodeconf/service.go
@@ -51,7 +51,7 @@ func (n *Node) Capacity() float64 {
 }
 
 func (s *service) Init(a *app.App) (err error) {
-	nodesConf := a.MustComponent("config").(configGetter).GetNodes()
+	nodesConf := a.MustComponent("config").(ConfigGetter).GetNodes()
 	s.accountId = a.MustComponent(commonaccount.CName).(commonaccount.Service).Account().PeerId
 
 	fileConfig := &configuration{