From 1bb9c912cd3f33bf677a5e64904faba4014d7b87 Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Thu, 26 Oct 2017 14:03:54 +0300
Subject: Don't emit new events if already unsubscribed

---
 src/mempool/mempool_watcher.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'src')

diff --git a/src/mempool/mempool_watcher.ts b/src/mempool/mempool_watcher.ts
index 7a485172d..8314afb0c 100644
--- a/src/mempool/mempool_watcher.ts
+++ b/src/mempool/mempool_watcher.ts
@@ -58,7 +58,9 @@ export class MempoolWatcher {
                 removed: isRemoved,
                 ...log,
             };
-            (this._callback as MempoolEventCallback)(logWithDecodedArgsEvent);
+            if (!_.isUndefined(this._callback)) {
+                this._callback(logWithDecodedArgsEvent);
+            }
         });
     }
 }
-- 
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