From 343289229eff85223f030c0f5e63c98854b6da22 Mon Sep 17 00:00:00 2001
From: John Russell <johnrussells@gmail.com>
Date: Wed, 28 May 2014 01:28:14 -0700
Subject: [PATCH] ensures that pubKey length is greater than m ensure that
 pubKey length is greater than m

use Array.isArray over instanceof

error message
---
 src/script.js  | 2 ++
 test/script.js | 4 ++++
 2 files changed, 6 insertions(+)

diff --git a/src/script.js b/src/script.js
index 8a28f10..188b0c3 100644
--- a/src/script.js
+++ b/src/script.js
@@ -304,6 +304,8 @@ Script.createP2SHScriptPubKey = function(hash) {
 
 // m [pubKeys ...] n OP_CHECKMULTISIG
 Script.createMultisigScriptPubKey = function(m, pubKeys) {
+  assert(Array.isArray(pubKeys), 'Expected Array, got: ' + pubKeys)
+  assert(pubKeys.length >= m, 'Not enough pubKeys provided')
   var script = new Script()
   var n = pubKeys.length
 
diff --git a/test/script.js b/test/script.js
index 41efcbd..c22361c 100644
--- a/test/script.js
+++ b/test/script.js
@@ -120,6 +120,10 @@ describe('Script', function() {
 
       assert.equal(multisigAddress.toString(), '32vYjxBb7pHJJyXgNk8UoK3BdRDxBzny2v')
     })
+
+    it('should throw on not enough pubKeys provided', function() {
+        assert.throws(function() {Script.createMultisigScriptPubKey(4, pubKeys)},  /Not enough pubKeys provided/)
+    })
   })
 
   describe('2-of-2 Multisig scriptSig', function() {