From 2dcd82312dcf0675bc697ef663c4436e42bd3f6f Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ian=20Desc=C3=B4teaux?= <checksum0@protonmail.com>
Date: Tue, 23 Apr 2019 02:52:22 -0400
Subject: [PATCH] Scripthash subscriptions: add mutex lock to notification
 handling

---
 electrum/subscribe.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/electrum/subscribe.go b/electrum/subscribe.go
index 6bef603..632c84b 100644
--- a/electrum/subscribe.go
+++ b/electrum/subscribe.go
@@ -94,12 +94,14 @@ func (s *Server) SubscribeScripthash() (*ScripthashSubscription, <-chan *Subscri
 				return
 			}
 
+			sub.lock.Lock()
 			for _, a := range sub.subscribedSH {
 				if a == resp.Params[0] {
 					sub.notifChan <- &resp
 					break
 				}
 			}
+			sub.lock.Unlock()
 		}
 	}()