From 1c555daafde55b2573c3fa2e759d80c78e5ce095 Mon Sep 17 00:00:00 2001
From: "Xinyang (Darren) Li" <3806865+darrenxyli@users.noreply.github.com>
Date: Sat, 29 May 2021 10:38:16 -0700
Subject: [PATCH] Mac address finding precondition checker fix.

mac address finding is based on `addrs`, and it could be empty, but the checker only exist when input param `ip` is empty.
---
 backend/services/local_node/node_info.go | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/backend/services/local_node/node_info.go b/backend/services/local_node/node_info.go
index d037da6d..98617602 100644
--- a/backend/services/local_node/node_info.go
+++ b/backend/services/local_node/node_info.go
@@ -39,13 +39,13 @@ func (l *LocalNode) Ready() error {
 
 func NewLocalNode(ip string, identify string, identifyTypeString string) (node *LocalNode, err error) {
 	addrs, err := sockaddr.GetPrivateInterfaces()
+	if len(addrs) == 0 {
+		return node, errors.New("address not found")
+	}
 	if ip == "" {
 		if err != nil {
 			return node, err
 		}
-		if len(addrs) == 0 {
-			return node, errors.New("address not found")
-		}
 		ipaddr := *sockaddr.ToIPAddr(addrs[0].SockAddr)
 		ip = ipaddr.NetIP().String()
 	}