From 6a56f209289105d7641c547a702469cbc9259029 Mon Sep 17 00:00:00 2001
From: Leonid Logvinov <logvinov.leon@gmail.com>
Date: Fri, 12 Jan 2018 21:39:51 +0100
Subject: Return after checking for an error and add an explanatory comment

---
 packages/0x.js/src/order_watcher/order_state_watcher.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/0x.js/src/order_watcher/order_state_watcher.ts b/packages/0x.js/src/order_watcher/order_state_watcher.ts
index 3543480f8..12ac60960 100644
--- a/packages/0x.js/src/order_watcher/order_state_watcher.ts
+++ b/packages/0x.js/src/order_watcher/order_state_watcher.ts
@@ -221,8 +221,9 @@ export class OrderStateWatcher {
                 this._callbackIfExists(err);
                 this.unsubscribe();
             }
+            return;
         }
-        const log = logIfExists as LogEvent;
+        const log = logIfExists as LogEvent; // At this moment we are sure that no error occured and log is defined.
         const maybeDecodedLog = this._abiDecoder.tryToDecodeLogOrNoop(log);
         const isLogDecoded = !_.isUndefined((maybeDecodedLog as LogWithDecodedArgs<any>).event);
         if (!isLogDecoded) {
-- 
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