From 69feb04da125c60563103fc95484188c20ed2737 Mon Sep 17 00:00:00 2001
From: Matthew Little <zone117x@gmail.com>
Date: Fri, 21 Feb 2014 23:09:02 -0700
Subject: [PATCH] Convert diff dividend to bignum only on init.

---
 lib/jobManager.js | 19 ++++---------------
 1 file changed, 4 insertions(+), 15 deletions(-)

diff --git a/lib/jobManager.js b/lib/jobManager.js
index 5a27be9..9e692fb 100644
--- a/lib/jobManager.js
+++ b/lib/jobManager.js
@@ -55,7 +55,7 @@ var JobManager = module.exports = function JobManager(options){
 
     var _this = this;
     var jobCounter = new JobCounter();
-    //var jobs = {};
+
 
     /**
      * It only checks if the blockTemplate is already in our jobs list.
@@ -70,20 +70,11 @@ var JobManager = module.exports = function JobManager(options){
         } else {
             return false;
         }
-
-        /*var newBlock = true;
-        for(var job in jobs){
-            if (jobs[job].rpcData.previousblockhash === prevBlockHash) {
-                newBlock = false;
-            }
-        }
-        return newBlock;*/
-
     }
 
 
     //Which number to use as dividend when converting difficulty to target
-    var diffDividend = (function(){
+    var diffDividend = bignum((function(){
         switch(options.algorithm){
             case 'sha256':
                 return '00000000ffff0000000000000000000000000000000000000000000000000000';
@@ -94,7 +85,7 @@ var JobManager = module.exports = function JobManager(options){
             case 'x11':
                 return '000000ffff000000000000000000000000000000000000000000000000000000';
         }
-    })();
+    })(), 16);
 
 
     //On initialization lets figure out which hashing algorithm to use
@@ -144,7 +135,6 @@ var JobManager = module.exports = function JobManager(options){
                 options.txMessages
             );
 
-            //jobs[tmpBlockTemplate.jobId] = tmpBlockTemplate;
 
             this.currentJob = tmpBlockTemplate;
             _this.emit('newBlock', tmpBlockTemplate);
@@ -169,7 +159,6 @@ var JobManager = module.exports = function JobManager(options){
             return shareError([20, 'incorrect size of extranonce2']);
 
         var job = this.currentJob;
-        //var job = jobs[jobId];
 
         if (typeof job === 'undefined' || job.jobId != jobId ) {
             return shareError([21, 'job not found']);
@@ -214,7 +203,7 @@ var JobManager = module.exports = function JobManager(options){
             blockHash = util.reverseBuffer(util.doublesha(headerBuffer)).toString('hex');
         }
         else {
-            var targetUser = bignum(diffDividend, 16).div(difficulty);
+            var targetUser = diffDividend.div(difficulty);
             if (headerBigNum.gt(targetUser)){
                 return shareError([23, 'low difficulty share']);
             }