From 173994c6e0034f3218cf86769d3d6c68264e7112 Mon Sep 17 00:00:00 2001
From: Daniel Cousens <github@dcousens.com>
Date: Fri, 2 Oct 2015 13:02:03 +1000
Subject: [PATCH] script: avoid slice if n !== pubKeys.length

---
 src/script.js | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/script.js b/src/script.js
index 69ce147..2004fa1 100644
--- a/src/script.js
+++ b/src/script.js
@@ -242,11 +242,9 @@ function isMultisigOutput (script) {
   if (m <= 0) return false
   if (m > n) return false
   if (n > 16) return false
+  if (n !== chunks.length - 3) return false
 
-  var pubKeys = chunks.slice(1, -2)
-  if (n !== pubKeys.length) return false
-
-  return pubKeys.every(isCanonicalPubKey)
+  return chunks.slice(1, -2).every(isCanonicalPubKey)
 }
 
 function isNullDataOutput (script) {