diff --git a/Gruntfile.js b/Gruntfile.js
index 98e6ef651..8aead0647 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -37,7 +37,8 @@ module.exports = function(grunt) {
           'src/js/routes.js',
           'src/js/services/*.js',
           'src/js/models/*.js',
-          'src/js/controllers/*.js'
+          'src/js/controllers/*.js',
+          'src/js/trezor.js'
         ],
         tasks: ['concat:js']
       }
@@ -77,7 +78,8 @@ module.exports = function(grunt) {
           'src/js/controllers/*.js',
           'src/js/translations.js',
           'src/js/version.js',
-          'src/js/init.js'
+          'src/js/init.js',
+          'src/js/trezor.js'
         ],
         dest: 'public/js/copay.js'
       },
diff --git a/public/views/create.html b/public/views/create.html
index f6d7ff43f..c11944d16 100644
--- a/public/views/create.html
+++ b/public/views/create.html
@@ -8,7 +8,7 @@
 
 <div class="content p20v" ng-controller="createController as create" ng-init="create.setTotalCopayers(1)">
 
-  <div class="onGoingProcess" ng-show="create.loading && !create.ledger">
+  <div class="onGoingProcess" ng-show="create.loading && !create.hwWallet">
     <div class="onGoingProcess-content" ng-style="{'background-color':'#222'}">
     <div class="spinner">
       <div class="rect1"></div>
@@ -21,7 +21,7 @@
     </div>
   </div>
 
-  <div class="onGoingProcess" ng-show="create.ledger">
+  <div class="onGoingProcess" ng-show="create.hwWallet">
     <div class="onGoingProcess-content" ng-style="{'background-color':'#222'}">
     <div class="spinner">
       <div class="rect1"></div>
@@ -30,7 +30,7 @@
       <div class="rect4"></div>
       <div class="rect5"></div>
     </div>
-    <span translate>Connecting to Ledger Wallet...</span>
+    <span translate>Connecting to {{create.hwWallet}} Wallet...</span>
     </div>
   </div>
 
@@ -102,10 +102,16 @@
         </div>
         <div ng-hide="hideAdv" class="row">
           <div class="large-12 columns">
+
             <label ng-show="create.isChromeApp() && totalCopayers > 1 " for="hw-ledger" class="oh">
               <span translate>Use Ledger hardware wallet</span>
               <switch id="hw-ledger" name="hwLedger" ng-model="hwLedger" ng-change="isTestnet=false" class="green right m5t m10b"></switch>
             </label>
+
+            <label ng-show="1" for="hw-trezor" class="oh">
+              <span translate>Use TREZOR hardware wallet</span>
+              <switch id="hw-trezor" name="hwTrezor" ng-model="hwTrezor" ng-change="isTestnet=false" class="green right m5t m10b"></switch>
+            </label>
 <!-- TODO account
             <div ng-show="hwLedger">
               <label class="oh"><span translate>Ledger Slot</span>
@@ -115,17 +121,17 @@
               <div class="oh text-gray line-b  size-12   p10b m20b"><span translate>Ledger supports up to 20 Copay wallets simultaneously. Select which slot should be used to host this wallet</div>
             </div> 
 -->        
-            <label for="network-name" class="oh" ng-show="!hwLedger">
+            <label for="network-name" class="oh" ng-show="!hwLedger && !hwTrezor">
               <span translate>Testnet</span>
               <switch id="network-name" name="isTestnet" ng-model="isTestnet" class="green right m5t m10b"></switch>
             </label>
 
-            <label  ng-show="!hwLedger" for="seed" class="oh">
+            <label  ng-show="!hwLedger && !hwTrezor" for="seed" class="oh">
               <span translate>Specify your wallet seed</span>
               <switch id="seed" name="setSeed" ng-model="setSeed" class="green right m5t m10b"></switch>
             </label>
 
-            <label for="createPassphrase" class="line-b oh" ng-show="!setSeed && !hwLedger" ><span translate>Seed Passphrase</span>  <small translate>Add an optional passphrase to secure the seed</small>
+            <label for="createPassphrase" class="line-b oh" ng-show="!setSeed && !hwLedger && !hwTrezor" ><span translate>Seed Passphrase</span>  <small translate>Add an optional passphrase to secure the seed</small>
               <div class="input">
                 <input type="text" class="form-control" 
                 name="createPassphrase" ng-model="createPassphrase">
@@ -139,7 +145,7 @@
               type="text"
               name="privateKey" ng-model="privateKey">
             </label>
-            <label for="passphrase" class="line-b oh" ng-show="setSeed && !hwLedger"><span translate>Seed Passphrase</span>  <small translate>The seed could require a passphrase to be imported</small>
+            <label for="passphrase" class="line-b oh" ng-show="setSeed && !hwLedger && !hwTrezor"><span translate>Seed Passphrase</span>  <small translate>The seed could require a passphrase to be imported</small>
               <div class="input">
                 <input type="text" class="form-control" name="passphrase" ng-model="passphrase">
               </div>
@@ -158,11 +164,11 @@
 
 
 
-        <button type="submit" class="button round black expand m0" ng-show="totalCopayers != 1" ng-disabled="setupForm.$invalid || create.loading || create.ledger">
+        <button type="submit" class="button round black expand m0" ng-show="totalCopayers != 1" ng-disabled="setupForm.$invalid || create.loading || create.hwWallet">
           <span translate>Create {{requiredCopayers}}-of-{{totalCopayers}} wallet</span>
         </button>
         
-	<button type="submit" class="button round black expand m0" ng-show="totalCopayers == 1" ng-disabled="setupForm.$invalid || create.loading || create.ledger">
+	<button type="submit" class="button round black expand m0" ng-show="totalCopayers == 1" ng-disabled="setupForm.$invalid || create.loading || create.hwWallet">
           <span translate>Create new wallet</span>
         </button>
       </div>
diff --git a/src/js/controllers/create.js b/src/js/controllers/create.js
index 60181be9f..b747b5f85 100644
--- a/src/js/controllers/create.js
+++ b/src/js/controllers/create.js
@@ -1,7 +1,7 @@
 'use strict';
 
 angular.module('copayApp.controllers').controller('createController',
-  function($scope, $rootScope, $location, $timeout, $log, lodash, go, profileService, configService, isMobile, isCordova, gettext, isChromeApp, ledger) {
+  function($scope, $rootScope, $location, $timeout, $log, lodash, go, profileService, configService, isMobile, isCordova, gettext, isChromeApp, ledger, trezor) {
 
     var self = this;
     var defaults = configService.getDefaults();
@@ -76,11 +76,15 @@ angular.module('copayApp.controllers').controller('createController',
         return;
       }
 
-      if (form.hwLedger.$modelValue) {
-        self.ledger = true;
+      if (form.hwLedger.$modelValue || form.hwTrezor.$modelValue) {
+        self.hwWallet = form.hwLedger.$modelValue ? 'Leger'  : 'TREZOR';
+
+        var src= form.hwLedger.$modelValue ? leger  : trezor;
+
         // TODO : account 
-        ledger.getInfoForNewWallet(0, function(err, lopts) {
-          self.ledger = false;
+        var account = 0;
+        src.getInfoForNewWallet(account, function(err, lopts) {
+          self.hwWallet = false;
           if (err) {
             self.error = err;
             $scope.$apply();
diff --git a/src/js/controllers/join.js b/src/js/controllers/join.js
index 6d24589be..c3f852371 100644
--- a/src/js/controllers/join.js
+++ b/src/js/controllers/join.js
@@ -47,8 +47,8 @@ angular.module('copayApp.controllers').controller('joinController',
  
       if (form.hwLedger.$modelValue) {
         self.ledger = true;
-        // TODO account
-        ledger.getInfoForNewWallet(0, function(err, lopts) {
+        // TODO account / network
+        ledger.getInfoForNewWallet(0, opts.networkName, function(err, lopts) {
           self.ledger = false;
           if (err) {
             self.error = err;
diff --git a/src/js/controllers/walletHome.js b/src/js/controllers/walletHome.js
index eae12254d..a772e1b0d 100644
--- a/src/js/controllers/walletHome.js
+++ b/src/js/controllers/walletHome.js
@@ -1176,4 +1176,5 @@ angular.module('copayApp.controllers').controller('walletHomeController', functi
     this.setAddress();
     this.setSendFormInputs();
   }
+
 });
diff --git a/src/js/services/profileService.js b/src/js/services/profileService.js
index 99e88db91..0e9d0883d 100644
--- a/src/js/services/profileService.js
+++ b/src/js/services/profileService.js
@@ -1,6 +1,6 @@
 'use strict';
 angular.module('copayApp.services')
-  .factory('profileService', function profileServiceFactory($rootScope, $location, $timeout, $filter, $log, lodash, storageService, bwcService, configService, notificationService, isChromeApp, isCordova, gettext, gettextCatalog, nodeWebkit, bwsError, uxLanguage, ledger, bitcore) {
+  .factory('profileService', function profileServiceFactory($rootScope, $location, $timeout, $filter, $log, lodash, storageService, bwcService, configService, notificationService, isChromeApp, isCordova, gettext, gettextCatalog, nodeWebkit, bwsError, uxLanguage, ledger, bitcore, trezor) {
 
     var root = {};
 
@@ -236,6 +236,7 @@ angular.module('copayApp.services')
       root._seedWallet(opts, function(err, walletClient) {
         if (err) return cb(err);
 
+console.log('[profileService.js.239:walletClient:]',walletClient); //TODO
         walletClient.createWallet(opts.name, opts.myName || 'me', opts.m, opts.n, {
           network: opts.networkName
         }, function(err, secret) {
@@ -561,16 +562,38 @@ angular.module('copayApp.services')
       });
     };
 
+
+    root._signWithTrezor = function(txp, cb) {
+      var fc = root.focusedClient;
+      $log.info('Requesting Trezor  to sign the transaction');
+
+      trezor.signTx(txp, 0, function(result) {
+console.log('[profileService.js.570:result:]',result); //TODO
+        if (!result.success)
+          return cb(result);
+
+        txp.signatures = lodash.map(result.signatures, function(s) {
+          return s.substring(0, s.length - 2);
+        });
+        return fc.signTxProposal(txp, cb);
+      });
+    };
+
+
     root.signTxProposal = function(txp, cb) {
       var fc = root.focusedClient;
 
       if (fc.isPrivKeyExternal()) {
-        if (fc.getPrivKeyExternalSourceName() != 'ledger') {
-          var msg = 'Unsupported External Key:' + fc.getPrivKeyExternalSourceName();
-          $log.error(msg);
-          return cb(msg);
+        switch (fc.getPrivKeyExternalSourceName()) {
+          case 'ledger':
+            return root._signWithLedger(txp, cb);
+          case 'trezor':
+            return root._signWithTrezor(txp, cb);
+          default:
+            var msg = 'Unsupported External Key:' + fc.getPrivKeyExternalSourceName();
+            $log.error(msg);
+            return cb(msg);
         }
-        return root._signWithLedger(txp, cb);
       } else {
         return fc.signTxProposal(txp, function(err, signedTxp) {
           root.lockFC();
diff --git a/src/js/services/trezor.js b/src/js/services/trezor.js
new file mode 100644
index 000000000..ea1c1d725
--- /dev/null
+++ b/src/js/services/trezor.js
@@ -0,0 +1,114 @@
+'use strict';
+
+angular.module('copayApp.services')
+  .factory('trezor', function($log, $timeout, bwcService, gettext, lodash) {
+    var root = {};
+
+    root.ENTROPY_INDEX_PATH = "0xb11e/";
+    root.callbacks = {};
+
+    root.getEntropySource = function(account, callback) {
+      var path = root.ENTROPY_INDEX_PATH + account + "'";
+      var xpub = root.getXPubKey(path, function(data) {
+        if (!data.success) {
+          $log.warn(data.message);
+          return callback(data);
+        }
+
+        var b = bwcService.getBitcore();
+
+        var x = b.HDPublicKey(data.xpubkey);
+        data.entropySource = x.publicKey.toString();
+        return callback(data);
+      });
+    };
+
+    root.getXPubKeyForAddresses = function(account, callback) {
+      return root.getXPubKey(root._getPath(account), callback);
+    };
+
+    root.getXPubKey = function(path, callback) {
+      $log.debug('TREZOR deriving xPub path:', path);
+      TrezorConnect.getXPubKey(path, callback);
+    };
+
+
+    root.getInfoForNewWallet = function(account, callback) {
+      var opts = {};
+      root.getEntropySource(account, function(data) {
+        if (!data.success) {
+          $log.warn(data.message);
+          return callback(data.message);
+        }
+        opts.entropySource = data.entropySource;
+        $log.debug('Waiting TREZOR to settle...');
+        $timeout(function() {
+          root.getXPubKeyForAddresses(account, function(data) {
+            if (!data.success) {
+              $log.warn(data.message);
+              return callback(data);
+            }
+            opts.extendedPublicKey = data.xpubkey;
+            opts.externalSource = 'trezor';
+            opts.externalIndex = account;
+            console.log('[trezor.js.51:opts:]', opts); //TODO
+            return callback(null, opts);
+          });
+        }, 5000);
+      });
+    };
+
+
+    root.signTx = function(txp, account, callback) {
+      if (txp.type != 'simple')
+        return callback('Only simple TXs are supported in TREZOR');
+
+      console.log('[trezor.js.90:txp:]', txp); //TODO
+      if (txp.addressType == 'P2PKH') {
+        var tx = bwcService.getUtils().buildTx(txp);
+
+        // spend one change output
+        var inputs = lodash.map(txp.inputs, function(i){
+          var pathArr = i.path.split('/');
+console.log('[trezor.js.72:pathArr:]',pathArr); //TODO
+          var n = [44 | 0x80000000, 0 | 0x80000000, account | 0x80000000, parseInt(pathArr[1]) , parseInt(pathArr[2])];
+          return {
+            address_n: n,
+            prev_index: i.vout,
+            prev_hash: i.txid,
+          };
+        });
+console.log('[trezor.js.68:inputs:]',inputs); //TODO
+
+        var pathArr = txp.changeAddress.path.split('/');
+console.log('[trezor.js.82:pathArr:]',pathArr); //TODO
+        var n = [44 | 0x80000000, 0 | 0x80000000, account | 0x80000000, parseInt(pathArr[1]) , parseInt(pathArr[2])];
+        // send to 1 address output and one change output
+        var outputs = [{
+          address_n: n,
+          amount: txp.amount - txp.fee,
+          script_type: 'PAYTOADDRESS'
+        }, {
+          address: txp.toAddress, 
+          amount: txp.amount,
+          script_type: 'PAYTOADDRESS'
+        }];
+console.log('[trezor.js.84:outputs:]',outputs); //TODO
+
+        TrezorConnect.signTx(inputs, outputs, function(result) {
+          console.log('[trezor.js.78:result:]', result); //TODO
+          callback(result);
+        });
+      } else {
+        var msg = 'P2SH wallets are not supported with TREZOR';
+        $log.error(msg);
+        return callback(msg);
+      }
+    }
+
+    root._getPath = function(account) {
+      return "44'/0'/" + account + "'";
+    }
+
+    return root;
+  });
diff --git a/src/js/trezor.js b/src/js/trezor.js
new file mode 100644
index 000000000..a509c0eba
--- /dev/null
+++ b/src/js/trezor.js
@@ -0,0 +1,368 @@
+window.TrezorConnect = (function () {
+    'use strict';
+
+    var CONNECT_ORIGIN = 'https://trezor.github.io';
+    var CONNECT_PATH = CONNECT_ORIGIN + '/connect';
+    var CONNECT_POPUP = CONNECT_PATH + '/popup/popup.html';
+
+    var ERR_TIMED_OUT = 'Loading timed out';
+    var ERR_WINDOW_CLOSED = 'Window closed';
+    var ERR_ALREADY_WAITING = 'Already waiting for a response';
+
+    var manager = new PopupManager(
+        CONNECT_POPUP,
+        CONNECT_ORIGIN,
+        'trezor-connect',
+        function () {
+            var w = 600;
+            var h = 500;
+            var x = (screen.width - w) / 2;
+            var y = (screen.height - h) / 3;
+            var params =
+                'height=' + h +
+                ',width=' + w +
+                ',left=' + x +
+                ',top=' + y +
+                ',menubar=no' +
+                ',toolbar=no' +
+                ',location=no' +
+                ',personalbar=no' +
+                ',status=no';
+            return params;
+        }
+    );
+
+    /**
+     * Public API.
+     */
+    function TrezorConnect() {
+
+        /**
+         * Popup errors.
+         */
+        this.ERR_TIMED_OUT = ERR_TIMED_OUT;
+        this.ERR_WINDOW_CLOSED = ERR_WINDOW_CLOSED;
+        this.ERR_ALREADY_WAITING = ERR_ALREADY_WAITING;
+
+        /**
+         * @typedef XPubKeyResult
+         * @param {boolean} success
+         * @param {?string} error
+         * @param {?string} xpubkey  serialized extended public key
+         */
+
+        /**
+         * Load BIP32 extended public key by path.
+         *
+         * Path can be specified either in the string form ("m/44'/1/0") or as
+         * raw integer array.
+         *
+         * @param {string|array<number>} path
+         * @param {function(XPubKeyResult)} callback
+         */
+        this.getXPubKey = function (path, callback) {
+            if (typeof path === 'string') {
+                path = parseHDPath(path);
+            }
+            manager.sendWithChannel({
+                'type': 'xpubkey',
+                'path': path
+            }, function (result) {
+                manager.close();
+                callback(result);
+            });
+        };
+
+        /**
+         * @typedef SignTxResult
+         * @param {boolean} success
+         * @param {?string} error
+         * @param {?string} serialized_tx      serialized tx, in hex, including signatures
+         * @param {?array<string>} signatures  array of input signatures, in hex
+         */
+
+        /**
+         * Sign a transaction in the device and return both serialized
+         * transaction and the signatures.
+         *
+         * @param {array<TxInputType>} inputs
+         * @param {array<TxOutputType>} outputs
+         * @param {function(SignTxResult)} callback
+         *
+         * @see https://github.com/trezor/trezor-common/blob/master/protob/types.proto
+         */
+        this.signTx = function (inputs, outputs, callback) {
+            manager.sendWithChannel({
+                'type': 'signtx',
+                'inputs': inputs,
+                'outputs': outputs
+            }, function (result) {
+                manager.close();
+                callback(result);
+            });
+        };
+
+        /**
+         * @typedef RequestLoginResult
+         * @param {boolean} success
+         * @param {?string} error
+         * @param {?string} public_key        public key used for signing, in hex
+         * @param {?string} signature         signature, in hex
+         */
+
+        /**
+         * Sign a login challenge for active origin.
+         *
+         * @param {?string} hosticon
+         * @param {string} challenge_hidden
+         * @param {string} challenge_visual
+         * @param {string|function(RequestLoginResult)} callback
+         *
+         * @see https://github.com/trezor/trezor-common/blob/master/protob/messages.proto
+         */
+        this.requestLogin = function (
+            hosticon,
+            challenge_hidden,
+            challenge_visual,
+            callback
+        ) {
+            if (typeof callback === 'string') {
+                // special case for a login through <trezor:login> button.
+                // `callback` is name of global var
+                callback = window[callback];
+            }
+            if (!callback) {
+                throw new TypeError('TrezorConnect: login callback not found');
+            }
+            manager.sendWithChannel({
+                'type': 'login',
+                'icon': hosticon,
+                'challenge_hidden': challenge_hidden,
+                'challenge_visual': challenge_visual
+            }, function (result) {
+                manager.close();
+                callback(result);
+            });
+        };
+
+        var LOGIN_CSS =
+            '<style>@import url("' + CONNECT_PATH + '/login_buttons.css")</style>';
+
+        var LOGIN_ONCLICK =
+            'TrezorConnect.requestLogin('
+            + "'@hosticon@','@challenge_hidden@','@challenge_visual@','@callback@'"
+            + ')';
+
+        var LOGIN_HTML =
+            '<div id="trezorconnect-wrapper">'
+            + '  <a id="trezorconnect-button" onclick="' + LOGIN_ONCLICK + '">'
+            + '    <span id="trezorconnect-icon"></span>'
+            + '    <span id="trezorconnect-text">@text@</span>'
+            + '  </a>'
+            + '  <span id="trezorconnect-info">'
+            + '    <a id="trezorconnect-infolink" href="https://www.buytrezor.com/"'
+            + '       target="_blank">What is TREZOR?</a>'
+            + '  </span>'
+            + '</div>';
+
+        /**
+         * Find <trezor:login> elements and replace them with login buttons.
+         * It's not required to use these special elements, feel free to call
+         * `TrezorConnect.requestLogin` directly.
+         */
+        this.renderLoginButtons = function () {
+            var elements = document.getElementsByTagName('trezor:login');
+
+            for (var i = 0; i < elements.length; i++) {
+                var e = elements[i];
+                var text = e.getAttribute('text') || 'Sign in with TREZOR';
+                var callback = e.getAttribute('callback') || '';
+                var hosticon = e.getAttribute('icon') || '';
+                var challenge_hidden = e.getAttribute('challenge_hidden') || '';
+                var challenge_visual = e.getAttribute('challenge_visual') || '';
+
+                // it's not valid to put markup into attributes, so let users
+                // supply a raw text and make TREZOR bold
+                text = text.replace('TREZOR', '<strong>TREZOR</strong>');
+
+                e.parentNode.innerHTML =
+                    LOGIN_CSS + LOGIN_HTML
+                    .replace('@text@', text)
+                    .replace('@callback@', callback)
+                    .replace('@hosticon@', hosticon)
+                    .replace('@challenge_hidden@', challenge_hidden)
+                    .replace('@challenge_visual@', challenge_visual);
+            }
+        };
+    }
+
+    var exports = new TrezorConnect();
+    exports.renderLoginButtons();
+    return exports;
+
+    /*
+     * `getXPubKey()`
+     */
+
+    function parseHDPath(string) {
+        return string
+            .toLowerCase()
+            .split('/')
+            .filter(function (p) { return p !== 'm'; })
+            .map(function (p) {
+                var n = parseInt(p);
+                if (p[p.length - 1] === "'") { // hardened index
+                    n = n | 0x80000000;
+                }
+                return n;
+            });
+    }
+
+    /*
+     * Popup management
+     */
+
+    function Popup(url, name, params) {
+        var w = window.open(url, name, params);
+
+        var interval;
+        var iterate = function () {
+            if (w.closed) {
+                clearInterval(interval);
+                if (this.onclose) {
+                    this.onclose();
+                }
+            }
+        }.bind(this);
+        interval = setInterval(iterate, 100);
+
+        this.window = w;
+        this.onclose = null;
+    }
+
+    function Channel(target, origin, waiting) {
+
+        var respond = function (data) {
+            if (waiting) {
+                var callback = waiting;
+                waiting = null;
+                callback(data);
+            }
+        };
+
+        var receive = function (event) {
+            if (event.source === target && event.origin === origin) {
+                respond(event.data);
+            }
+        };
+
+        window.addEventListener('message', receive);
+
+        this.respond = respond;
+
+        this.close = function () {
+            window.removeEventListener('message', receive);
+        };
+
+        this.send = function (value, callback) {
+            if (waiting === null) {
+                waiting = callback;
+                target.postMessage(value, origin);
+            } else {
+                throw new Error(ERR_ALREADY_WAITING);
+            }
+        };
+    }
+
+    function ConnectedChannel(url, origin, name, params) {
+
+        var ready = function () {
+            clearTimeout(this.timeout);
+            this.popup.onclose = null;
+            this.ready = true;
+            this.onready();
+        }.bind(this);
+
+        var closed = function () {
+            clearTimeout(this.timeout);
+            this.channel.close();
+            this.onerror(new Error(ERR_WINDOW_CLOSED));
+        }.bind(this);
+
+        var timedout = function () {
+            this.popup.onclose = null;
+            this.popup.window.close();
+            this.channel.close();
+            this.onerror(new Error(ERR_TIMED_OUT));
+        }.bind(this);
+
+        this.popup = new Popup(url, name, params);
+        this.channel = new Channel(this.popup.window, origin, ready);
+        this.timeout = setTimeout(timedout, 5000);
+
+        this.popup.onclose = closed;
+
+        this.ready = false;
+        this.onready = null;
+        this.onerror = null;
+    }
+
+    function PopupManager(url, origin, name, onparams) {
+        var cc = null;
+
+        var closed = function () {
+            cc.channel.respond(new Error(ERR_WINDOW_CLOSED));
+            cc.channel.close();
+            cc = null;
+        };
+
+        var open = function (callback) {
+            cc = new ConnectedChannel(url, origin, name, onparams());
+            cc.onready = function () {
+                cc.popup.onclose = closed;
+                callback(cc.channel);
+            };
+            cc.onerror = function (error) {
+                cc = null;
+                callback(error);
+            };
+        };
+
+        this.close = function () {
+            if (cc) {
+                cc.popup.window.close();
+            }
+        };
+
+        this.waitForChannel = function (callback) {
+            if (cc) {
+                if (cc.ready) {
+                    callback(cc.channel);
+                } else {
+                    callback(new Error(ERR_ALREADY_WAITING));
+                }
+            } else {
+                open(callback);
+            }
+        };
+
+        this.sendWithChannel = function (message, callback) {
+            var onresponse = function (response) {
+                if (response instanceof Error) {
+                    callback({success: false, error: response.message});
+                } else {
+                    callback(response);
+                }
+            };
+            var onchannel = function (channel) {
+                if (channel instanceof Error) {
+                    callback({success: false, error: channel.message});
+                } else {
+                    channel.send(message, onresponse);
+                }
+            }
+            this.waitForChannel(onchannel);
+        };
+    }
+
+}());