diff --git a/copay.js b/copay.js
index 79a70f8b0..fc4f7d4ec 100644
--- a/copay.js
+++ b/copay.js
@@ -6,7 +6,7 @@ module.exports.PrivateKey = require('./js/models/PrivateKey');
 module.exports.HDPath = require('./js/models/HDPath');
 module.exports.HDParams = require('./js/models/HDParams');
 module.exports.crypto = require('./js/util/crypto');
-module.exports.logger = require('./js/log');
+module.exports.logger = require('./js/util/log');
 
 
 // components
diff --git a/js/models/Async.js b/js/models/Async.js
index 067cc50f1..505b7826e 100644
--- a/js/models/Async.js
+++ b/js/models/Async.js
@@ -2,7 +2,7 @@
 
 var EventEmitter = require('events').EventEmitter;
 var bitcore = require('bitcore');
-var log = require('../log');
+var log = require('../util/log');
 var AuthMessage = bitcore.AuthMessage;
 var util = bitcore.util;
 var nodeUtil = require('util');
diff --git a/js/models/Compatibility.js b/js/models/Compatibility.js
index d42eb9be0..bab4f5b57 100644
--- a/js/models/Compatibility.js
+++ b/js/models/Compatibility.js
@@ -5,7 +5,7 @@ var Wallet = require('./Wallet');
 var cryptoUtils = require('../util/crypto');
 var CryptoJS = require('node-cryptojs-aes').CryptoJS;
 var sjcl = require('../../lib/sjcl');
-var log = require('../log');
+var log = require('../util/log');
 var preconditions = require('preconditions').instance();
 var _ = require('lodash');
 
diff --git a/js/models/Identity.js b/js/models/Identity.js
index 53984fbdf..d404fc9f3 100644
--- a/js/models/Identity.js
+++ b/js/models/Identity.js
@@ -3,7 +3,6 @@ var _ = require('lodash');
 var preconditions = require('preconditions').singleton();
 var inherits = require('inherits');
 var events = require('events');
-var log = require('../log');
 var async = require('async');
 
 var bitcore = require('bitcore');
@@ -14,9 +13,9 @@ var PrivateKey = require('./PrivateKey');
 var Wallet = require('./Wallet');
 var PluginManager = require('./PluginManager');
 var Async = require('./Async');
-
-var version = require('../../version').version;
 var cryptoUtil = require('../util/crypto');
+var log = require('../util/log');
+var version = require('../../version').version;
 
 /**
  * @desc
diff --git a/js/models/Insight.js b/js/models/Insight.js
index e1cde179a..d07484f59 100644
--- a/js/models/Insight.js
+++ b/js/models/Insight.js
@@ -3,14 +3,16 @@
 var util = require('util');
 var async = require('async');
 var request = require('request');
-var bitcore = require('bitcore');
 var io = require('socket.io-client');
 var _ = require('lodash');
-var log = require('../log');
-
 var EventEmitter = require('events').EventEmitter;
 var preconditions = require('preconditions').singleton();
 
+var bitcore = require('bitcore');
+
+var log = require('../util/log.js');
+
+
 /*
   This class lets interfaces with the blockchain, making general queries and
   subscribing to transactions on adressess and blocks.
diff --git a/js/models/PluginManager.js b/js/models/PluginManager.js
index 2a2788b61..d2d8d57fc 100644
--- a/js/models/PluginManager.js
+++ b/js/models/PluginManager.js
@@ -1,6 +1,6 @@
 'use strict';
 var preconditions = require('preconditions').singleton();
-var log = require('../log');
+var log = require('../util/log');
 
 function PluginManager(config) {
   this.registered = {};
diff --git a/js/models/PublicKeyRing.js b/js/models/PublicKeyRing.js
index 6963e8bab..9bfe0caab 100644
--- a/js/models/PublicKeyRing.js
+++ b/js/models/PublicKeyRing.js
@@ -2,7 +2,7 @@
 
 var preconditions = require('preconditions').instance();
 var _ = require('lodash');
-var log = require('../log');
+var log = require('../util/log');
 var bitcore = require('bitcore');
 var HK = bitcore.HierarchicalKey;
 var Address = bitcore.Address;
@@ -110,7 +110,7 @@ PublicKeyRing.fromObj = function(opts) {
   }
 
   if (opts.cache && opts.cache.addressToPath) {
-    log.info('PublicKeyRing: Using address cache');
+    log.debug('PublicKeyRing: Using address cache');
     pkr.cache.addressToPath = opts.cache.addressToPath;
     pkr.rebuildCache();
   }
diff --git a/js/models/RateService.js b/js/models/RateService.js
index c0819f8c2..aec56366d 100644
--- a/js/models/RateService.js
+++ b/js/models/RateService.js
@@ -2,7 +2,7 @@
 
 var util = require('util');
 var _ = require('lodash');
-var log = require('../log');
+var log = require('../util/log');
 var preconditions = require('preconditions').singleton();
 var request = require('request');
 
diff --git a/js/models/TxProposal.js b/js/models/TxProposal.js
index 036dd5b63..8f4fe53c7 100644
--- a/js/models/TxProposal.js
+++ b/js/models/TxProposal.js
@@ -10,7 +10,7 @@ var TransactionBuilder = bitcore.TransactionBuilder;
 var Script = bitcore.Script;
 var Key = bitcore.Key;
 
-var log = require('../log');
+var log = require('../util/log');
 
 var TX_MAX_SIZE_KB = 50;
 var VERSION = 1;
diff --git a/js/models/TxProposals.js b/js/models/TxProposals.js
index 477f276a2..074091ad5 100644
--- a/js/models/TxProposals.js
+++ b/js/models/TxProposals.js
@@ -9,7 +9,7 @@ var Script = bitcore.Script;
 var Key = bitcore.Key;
 var buffertools = bitcore.buffertools;
 
-var log = require('../log');
+var log = require('../util/log');
 var TxProposal = require('./TxProposal');;
 
 function TxProposals(opts) {
diff --git a/js/models/Wallet.js b/js/models/Wallet.js
index 13a90cfd4..c61eb1e93 100644
--- a/js/models/Wallet.js
+++ b/js/models/Wallet.js
@@ -18,7 +18,7 @@ var Address = bitcore.Address;
 var PayPro = bitcore.PayPro;
 var Transaction = bitcore.Transaction;
 
-var log = require('../log');
+var log = require('../util/log');
 var cryptoUtil = require('../util/crypto');
 var httpUtil = require('../util/HTTP');
 var HDParams = require('./HDParams');
diff --git a/js/plugins/EncryptedInsightStorage.js b/js/plugins/EncryptedInsightStorage.js
index 0081dc0e3..d6fd4f0f7 100644
--- a/js/plugins/EncryptedInsightStorage.js
+++ b/js/plugins/EncryptedInsightStorage.js
@@ -1,7 +1,7 @@
 var cryptoUtil = require('../util/crypto');
 var InsightStorage = require('./InsightStorage');
 var inherits = require('inherits');
-var log = require('../log');
+var log = require('../util/log');
 var SEPARATOR = '%^#@';
 
 function EncryptedInsightStorage(config) {
diff --git a/js/plugins/EncryptedLocalStorage.js b/js/plugins/EncryptedLocalStorage.js
index 89c104cab..591308f17 100644
--- a/js/plugins/EncryptedLocalStorage.js
+++ b/js/plugins/EncryptedLocalStorage.js
@@ -1,5 +1,5 @@
 var cryptoUtil = require('../util/crypto');
-var log = require('../log');
+var log = require('../util/log');
 var LocalStorage = require('./LocalStorage');
 var inherits = require('inherits');
 
diff --git a/js/plugins/GoogleDrive.js b/js/plugins/GoogleDrive.js
index 599314961..b786fca4b 100644
--- a/js/plugins/GoogleDrive.js
+++ b/js/plugins/GoogleDrive.js
@@ -3,7 +3,7 @@
 var preconditions = require('preconditions').singleton();
 var loaded = 0;
 var SCOPES = 'https://www.googleapis.com/auth/drive';
-var log = require('../log');
+var log = require('../util/log');
 
 function GoogleDrive(config) {
   preconditions.checkArgument(config && config.clientId, 'No clientId at GoogleDrive config');
diff --git a/js/plugins/InsightStorage.js b/js/plugins/InsightStorage.js
index 26f5fda2f..522444c3e 100644
--- a/js/plugins/InsightStorage.js
+++ b/js/plugins/InsightStorage.js
@@ -4,7 +4,7 @@ var bitcore = require('bitcore');
 var buffers = require('buffer');
 var querystring = require('querystring');
 var Identity = require('../models/Identity');
-var log = require('../log');
+var log = require('../util/log');
 
 var SEPARATOR = '|';
 
diff --git a/js/plugins/LocalStorage.js b/js/plugins/LocalStorage.js
index ccdfaa1a8..0692a13ae 100644
--- a/js/plugins/LocalStorage.js
+++ b/js/plugins/LocalStorage.js
@@ -1,8 +1,12 @@
 'use strict';
 var _ = require('lodash');
+var preconditions = require('preconditions').singleton();
 
 function LocalStorage() {
   this.type = 'DB';
+
+  preconditions.checkState(typeof localStorage !== 'undefined',
+                           'localstorage not available, cannot run plugin');
 };
 
 LocalStorage.prototype.init = function() {
diff --git a/js/util/HTTP.js b/js/util/HTTP.js
index 00daa6d93..e900c5334 100644
--- a/js/util/HTTP.js
+++ b/js/util/HTTP.js
@@ -1,3 +1,5 @@
+var preconditions = require('preconditions').singleton();
+
 module.exports = {
   request: function(options, callback) {
     preconditions.checkArgument(_.isObject(options));
@@ -25,9 +27,9 @@ module.exports = {
     var req = options;
 
     req.headers = req.headers || {};
-    req.body = req.body || req.data || {};
+    req.body = req.body || req.data || '';
 
-    var xhr = new XMLHttpRequest();
+    var xhr = options.xhr || new XMLHttpRequest();
     xhr.open(method, url, true);
 
     Object.keys(req.headers).forEach(function(key) {
@@ -51,6 +53,7 @@ module.exports = {
           headers[$1.toLowerCase()] = $2;
         }
       );
+
       return ret._success(buf, xhr.status, headers, options);
     };
 
diff --git a/js/util/crypto.js b/js/util/crypto.js
index 3497207f6..cb438ea18 100644
--- a/js/util/crypto.js
+++ b/js/util/crypto.js
@@ -2,8 +2,9 @@
  * Small module for some helpers that wrap sjcl with some good practices.
  */
 var sjcl = require('sjcl');
-var log = require('../log.js');
 var _ = require('lodash');
+
+var log = require('../util/log.js');
 var config = require('../../config');
 
 var defaultSalt = (config && config.passphraseConfig && config.passphraseConfig.storageSalt) || 'mjuBtGybi/4=';
diff --git a/js/log.js b/js/util/log.js
similarity index 85%
rename from js/log.js
rename to js/util/log.js
index 1d7c7c776..27a2f02aa 100644
--- a/js/log.js
+++ b/js/util/log.js
@@ -1,6 +1,11 @@
-var config = config || require('../config');
+var config = config || require('../../config');
 var _ = require('lodash');
+var ls;
 
+try {
+  var LS = require('../plugins/LocalStorage');
+  ls = new LS();
+} catch(e) {};
 
 /**
  * @desc
@@ -119,13 +124,18 @@ Logger.prototype.setLevel = function(level) {
 var logger = new Logger('copay');
 var error = new Error();
 
-var logLevel = config.logLevel;
+var logLevel = config.logLevel || 'info';
 
-if (typeof localStorage !== "undefined" && localStorage.getItem) {
-  var localConfig = JSON.parse(localStorage.getItem("config"));
-  if (localConfig && localConfig.logLevel)
-    logLevel = localConfig.logLevel;
+if (ls && ls.getItem) {
+  ls.getItem("config", function(err, value) {
+    if (err) return;
+    var localConfig = JSON.parse(value);
+    if (localConfig && localConfig.logLevel)
+      logLevel = localConfig.logLevel;
+    logger.setLevel(logLevel);
+  });
+} else {
+  logger.setLevel(logLevel);
 }
 
-logger.setLevel(logLevel);
 module.exports = logger;
diff --git a/karma.conf.js b/karma.conf.js
index 650d409c1..a194c5a3a 100644
--- a/karma.conf.js
+++ b/karma.conf.js
@@ -45,7 +45,6 @@ module.exports = function(config) {
 
       //App-specific Code
       'js/app.js',
-      'js/log.js',
       'js/routes.js',
       'js/services/*.js',
       'js/directives.js',
diff --git a/package.json b/package.json
index e556cb370..108961d7e 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   },
   "scripts": {
     "start": "node server.js",
-    "coverage": "./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha -- --reporter spec test",
+    "coverage": "./node_modules/.bin/istanbul cover -x lib/sjcl.js ./node_modules/.bin/_mocha -- --reporter spec test",
     "test": "sh test/run.sh",
     "dist": "node shell/scripts/dist.js",
     "shell": "node shell/scripts/launch.js",
diff --git a/test/util.crypto.js b/test/util.crypto.js
index 765e537ba..c6171e1ea 100644
--- a/test/util.crypto.js
+++ b/test/util.crypto.js
@@ -14,6 +14,19 @@ describe('crypto utils', function() {
     decrypted.should.equal(message);
   });
 
+
+  it('should decrypt what it encrypts (JSON)', function() {
+
+    var key = 'My secret key';
+    var message = {'hola': 'picho'};
+    var encrypted = cryptoUtils.encrypt(key, message);
+    var decrypted = cryptoUtils.decrypt(key, encrypted);
+
+    JSON.parse(decrypted).should.deep.equal(message);
+  });
+
+
+
   it('should return null if the provided key cant decrypt', function() {
     var key = 'My secret key';
     var message = 'My secret message';
@@ -22,6 +35,17 @@ describe('crypto utils', function() {
 
     assert(decrypted === null);
   });
+ 
+
+
+  it('should sign a message', function() {
+    var key = 'My secret key';
+    var message = 'My secret message';
+    var signature = cryptoUtils.hmac(key, message);
+    signature.should.be.equal('6tpegxYl/Eig9k1Lla8b8G8OcdtOxyNbDsdyic1Yzh4=');
+  });
+ 
+
 
   var tests = [
     {
@@ -55,6 +79,11 @@ describe('crypto utils', function() {
       phrase.should.equal(expected);
     });
   });
+  it('should generate a passphrase using default salt/iter', function() {
+    var phrase = cryptoUtils.kdf('Pwd123!@#$%^&*(){}[]\|/?.>,<=+-_`~åéþ䲤þçæ¶');
+    var expected = 'ml+mMtjgcvL2pdfDwQqW2qONRNjZ3YD8KnGeV3aFjyOoM0ByOmoREw9zBvowC/ZXsfrezbRXX/W/XIzKOqdrXA==';
+    phrase.should.equal(expected);
+  });
 
 
 });
diff --git a/test/util.http.js b/test/util.http.js
new file mode 100644
index 000000000..4990d41e7
--- /dev/null
+++ b/test/util.http.js
@@ -0,0 +1,89 @@
+'use strict';
+
+var _ = require('lodash');
+var chai = chai || require('chai');
+var sinon = sinon || require('sinon');
+var should = chai.should();
+var httpUtils = require('../js/util/HTTP');
+describe('http utils', function() {
+
+  var xhr;
+  beforeEach(function() {
+    xhr = {
+      open: sinon.stub(),
+      getAllResponseHeaders: sinon.stub().returns('Content-type: xx'),
+      setRequestHeader: sinon.stub().returns(),
+      send: function() {
+        var self = this;
+        setTimeout(function() {
+          self.response = 'test';
+          self.error ? self.onerror() : self.onload();
+        }, 10);
+      },
+    };
+  });
+
+  it('should get success', function(done) {
+    xhr.error = 0;
+    httpUtils.request({
+      xhr: xhr,
+      method: 'GET',
+      url: 'http://test'
+    }).success(function(data, status) {
+      done();
+    }).error(function(data, status) {
+      throw new Error();
+    });
+  });
+  it('should get error', function(done) {
+    xhr.error = 1;
+    httpUtils.request({
+      xhr: xhr,
+      method: 'GET',
+      url: 'http://test',
+    }).success(function(data, status) {
+      throw new Error();
+    }).error(function(data, status) {
+      done();
+    });
+  });
+
+  it('should get with headers', function(done) {
+    xhr.error = 0;
+    httpUtils.request({
+      xhr: xhr,
+      method: 'GET',
+      url: 'http://test',
+      headers: {
+        'Content-Transfer-Encoding': 'a',
+        'Content-Length': 1,
+        'X-test': 2,
+      }
+    }).success(function(data, status) {
+      done();
+    });
+  });
+  it('should get with body', function(done) {
+    xhr.error = 0;
+    httpUtils.request({
+      xhr: xhr,
+      method: 'GET',
+      url: 'http://test',
+      body: 'hola',
+      responseType: 'type',
+    }).success(function(data, status) {
+      done();
+    });
+  });
+  it('should get with default error', function() {
+    xhr.error = 1;
+
+    var ret = httpUtils.request({
+      xhr: xhr,
+      method: 'GET',
+      url: 'http://test',
+    });
+    ret._error.should.throw()
+  });
+
+});
diff --git a/test/util.log.js b/test/util.log.js
new file mode 100644
index 000000000..13694c105
--- /dev/null
+++ b/test/util.log.js
@@ -0,0 +1,41 @@
+'use strict';
+
+var _ = require('lodash');
+var chai = chai || require('chai');
+var sinon = sinon || require('sinon');
+var should = chai.should();
+var log = require('../js/util/log');
+
+describe('log utils', function() {
+  afterEach(function() {
+    log.setLevel('info');
+  });
+
+  it('should log fatal', function() {
+    if (console.warn.restore)
+      console.warn.restore();
+
+    sinon.stub(console,'warn');
+
+    log.setLevel('debug');
+    log.warn('hola');
+
+    var arg = console.warn.getCall(0).args[0];
+    arg.should.contain('util.log.js');
+    arg.should.contain('hola');
+    console.warn.restore();
+  });
+
+  it('should not log debug', function() {
+    sinon.stub(console,'log');
+    log.setLevel('info');
+    log.debug('hola');
+    console.log.called.should.equal(false);
+    console.log.restore();
+  });
+
+  it('should log debug', function() {
+    log.getLevels().debug.should.equal(0);
+    log.getLevels().fatal.should.equal(5);
+  });
+});
diff --git a/util/build.js b/util/build.js
index f3fb38c7b..5bbd0264e 100644
--- a/util/build.js
+++ b/util/build.js
@@ -81,6 +81,13 @@ var createBundle = function(opts) {
   b.require('./js/models/PluginManager', {
     expose: '../js/models/PluginManager'
   });
+  b.require('./js/util/HTTP', {
+    expose: '../js/util/HTTP'
+  });
+   b.require('./js/util/log', {
+    expose: '../js/util/log'
+  });
+ 
   if (!opts.disablePlugins) {
     b.require('./js/plugins/GoogleDrive', {
       expose: '../plugins/GoogleDrive'
@@ -109,9 +116,6 @@ var createBundle = function(opts) {
 
   // The following 2 lines fix karma tests
   b.require('sjcl');
-  b.require('./js/log', {
-    expose: '../log.js'
-  });
 
   if (opts.debug) {
     //include dev dependencies