From 0eb54646f4b29a53d5789a2beba233763b11e2b0 Mon Sep 17 00:00:00 2001
From: simov <simeonvelichkov@gmail.com>
Date: Wed, 16 Dec 2015 17:22:48 +0200
Subject: [PATCH] Call self.watch only if the callback is a function - For some
 reason when the callback is added through the watch method for allEvents, the
 Filter ctor receives the options object in place of the callback. Fixes #354

---
 lib/web3/filter.js | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/lib/web3/filter.js b/lib/web3/filter.js
index e5a5f3267e4..ca7ba38e253 100644
--- a/lib/web3/filter.js
+++ b/lib/web3/filter.js
@@ -53,7 +53,7 @@ var getOptions = function (options) {
 
     if (utils.isString(options)) {
         return options;
-    } 
+    }
 
     options = options || {};
 
@@ -69,8 +69,8 @@ var getOptions = function (options) {
         to: options.to,
         address: options.address,
         fromBlock: formatters.inputBlockNumberFormatter(options.fromBlock),
-        toBlock: formatters.inputBlockNumberFormatter(options.toBlock) 
-    }; 
+        toBlock: formatters.inputBlockNumberFormatter(options.toBlock)
+    };
 };
 
 /**
@@ -78,7 +78,7 @@ Adds the callback and sets up the methods, to iterate over the results.
 
 @method getLogsAtStart
 @param {Object} self
-@param {funciton} 
+@param {funciton}
 */
 var getLogsAtStart = function(self, callback){
     // call getFilterLogs for the first watch callback start
@@ -168,7 +168,7 @@ var Filter = function (requestManager, options, methods, formatter, callback) {
                 pollFilter(self);
 
             // start to watch immediately
-            if(callback) {
+            if(typeof callback === 'function') {
                 return self.watch(callback);
             }
         }