cleaner code

lib/server.js

@@ -626,6 +626,9 @@ WalletService.prototype._getBlockchainExplorer = function(network) {
 WalletService.prototype.getUtxos = function(cb) {
   var self = this;
 
+  function utxoKey(utxo) {
+    return utxo.txid + '|' + utxo.vout
+  };
 
   // Get addresses for this wallet
   self.storage.fetchAddresses(self.walletId, function(err, addresses) {
@@ -651,24 +654,13 @@ WalletService.prototype.getUtxos = function(cb) {
       self.getPendingTxs({}, function(err, txps) {
         if (err) return cb(err);
 
-        var utxoKey = function(utxo) {
-          return utxo.txid + '|' + utxo.vout
-        };
+        var lockedInputs = _.map(_.flatten(_.pluck(txps, 'inputs')), utxoKey);
 
-        var inputs = _.chain(txps)
-          .pluck('inputs')
-          .flatten()
-          .map(utxoKey)
-          .value();
+        var utxoIndex = _.indexBy(utxos, utxoKey);
 
-        var dictionary = _.reduce(utxos, function(memo, utxo) {
-          memo[utxoKey(utxo)] = utxo;
-          return memo;
-        }, {});
-
-        _.each(inputs, function(input) {
-          if (dictionary[input]) {
-            dictionary[input].locked = true;
+        _.each(lockedInputs, function(input) {
+          if (utxoIndex[input]) {
+            utxoIndex[input].locked = true;
           }
         });
 
@@ -703,9 +695,7 @@ WalletService.prototype._totalizeUtxos = function(utxos) {
 WalletService.prototype._computeKbToSendMax = function(utxos, amount, cb) {
   var self = this;
 
-  var unlockedUtxos = _.filter(utxos, {
-    locked: false
-  });
+  var unlockedUtxos = _.reject(utxos, 'locked');
   if (_.isEmpty(unlockedUtxos)) return cb(null, 0);
 
   self.getWallet({}, function(err, wallet) {
@@ -1500,10 +1490,7 @@ WalletService.prototype.getTxHistory = function(opts, cb) {
       var filter = {};
       if (_.isBoolean(isMine)) filter.isMine = isMine;
       if (_.isBoolean(isChange)) filter.isChange = isChange;
-      return _.reduce(_.where(items, filter),
-        function(memo, item) {
-          return memo + item.amount;
-        }, 0);
+      return _.sum(_.filter(items, filter), 'amount');
     };
 
     function classify(items) {

test/integration/server.js

@@ -288,11 +288,11 @@ helpers.createAddresses = function(server, wallet, main, change, cb) {
 
 var storage, blockchainExplorer;
 
-var useMongo = false;
+var useMongoDb = !!process.env.USE_MONGO_DB;
 
 function initStorage(cb) {
   function getDb(cb) {
-    if (useMongo) {
+    if (useMongoDb) {
       var mongodb = require('mongodb');
       mongodb.MongoClient.connect('mongodb://localhost:27017/bws_test', function(err, db) {
         if (err) throw err;