cosmetic: move Interaction from types.go to utils.go

router/types.go

@@ -1,6 +1 @@
 package router
-
-type Interaction struct {
-	code       int
-	resultChan chan<- interface{}
-}

router/utils.go

@@ -7,6 +7,11 @@ import (
 	"net"
 )
 
+type Interaction struct {
+	code       int
+	resultChan chan<- interface{}
+}
+
 func checkFatal(e error) {
 	if e != nil {
 		log.Fatal(e)