diff --git a/rpc/discovery_service.go b/rpc/discovery_service.go
index ec82d3f..5de5024 100644
--- a/rpc/discovery_service.go
+++ b/rpc/discovery_service.go
@@ -16,10 +16,17 @@ type StartResponseParam struct {
 	Result int
 }
 
-func (ds *DiscoveryService) Start(req *StartRequestParam, res *StartResponseParam) error {
+func (ds *DiscoveryService) Start(req StartRequestParam) (*StartResponseParam, error) {
 	log.Printf("DiscoveryService.Start param: Name[%s] Count[%d]", req.Name, req.Count)
+	res := &StartResponseParam{}
 
 	res.Result = 10 + req.Count
 
+	return res, nil
+}
+
+func (ds *DiscoveryService) Discovery(name string, req StartRequestParam) error {
+	log.Printf("DiscoveryService.Discovery param: Name[%s] req[%v]", name, req)
+
 	return nil
 }
diff --git a/rpc/rpc.go b/rpc/rpc.go
index e69de29..9ab1e3e 100644
--- a/rpc/rpc.go
+++ b/rpc/rpc.go
@@ -0,0 +1 @@
+package rpc