From 9b90111a0a80fe8dcb0362c03777eeb4faface76 Mon Sep 17 00:00:00 2001
From: Christopher Jeffrey <chjjeffrey@gmail.com>
Date: Fri, 11 Mar 2016 22:58:01 -0800
Subject: [PATCH] refactor.

---
 lib/bcoin/chaindb.js | 34 +++++++++++-----------------------
 1 file changed, 11 insertions(+), 23 deletions(-)

diff --git a/lib/bcoin/chaindb.js b/lib/bcoin/chaindb.js
index fefdf503..0db97516 100644
--- a/lib/bcoin/chaindb.js
+++ b/lib/bcoin/chaindb.js
@@ -1263,8 +1263,6 @@ ChainDB.prototype.isUnspentTX = function isUnspentTX(hash, callback) {
 };
 
 ChainDB.prototype.isSpentTX = function isSpentTX(hash, callback) {
-  var spent = true;
-
   if (hash.hash)
     hash = hash.hash('hex');
 
@@ -1277,29 +1275,19 @@ ChainDB.prototype.isSpentTX = function isSpentTX(hash, callback) {
     keyAsBuffer: false
   });
 
-  (function next() {
-    iter.next(function(err, key, value) {
-      if (err) {
-        return iter.end(function() {
-          done(err);
-        });
-      }
+  iter.next(function(err, key, value) {
+    if (err) {
+      return iter.end(function() {
+        callback(err);
+      });
+    }
 
-      if (key === undefined)
-        return iter.end(done);
-
-      spent = false;
-
-      iter.end(done);
+    iter.end(function(err) {
+      if (err)
+        return callback(err);
+      return callback(null, key === undefined);
     });
-  })();
-
-  function done(err) {
-    if (err)
-      return callback(err);
-
-    return callback(null, spent);
-  }
+  });
 };
 
 ChainDB.prototype.hasTX = function hasTX(hash, callback) {