From 887722f38ffc4b2953284f898305a3b943694e06 Mon Sep 17 00:00:00 2001
From: "Johan T. Halseth" <johanth@gmail.com>
Date: Thu, 9 Aug 2018 10:03:14 +0200
Subject: [PATCH] htlcswitch/switch: add method HasActiveLink

---
 htlcswitch/switch.go | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/htlcswitch/switch.go b/htlcswitch/switch.go
index ecb56a5f5..74e0a2787 100644
--- a/htlcswitch/switch.go
+++ b/htlcswitch/switch.go
@@ -1902,6 +1902,16 @@ func (s *Switch) getLinkByShortID(chanID lnwire.ShortChannelID) (ChannelLink, er
 	return link, nil
 }
 
+// HasActiveLink returns true if the given channel ID has a link in the link
+// index.
+func (s *Switch) HasActiveLink(chanID lnwire.ChannelID) bool {
+	s.indexMtx.RLock()
+	defer s.indexMtx.RUnlock()
+
+	_, ok := s.linkIndex[chanID]
+	return ok
+}
+
 // RemoveLink purges the switch of any link associated with chanID. If a pending
 // or active link is not found, this method does nothing. Otherwise, the method
 // returns after the link has been completely shutdown.