diff --git a/js/directives.js b/js/directives.js
index 3dea498a4..7ccb89d5f 100644
--- a/js/directives.js
+++ b/js/directives.js
@@ -1,8 +1,9 @@
 'use strict';
 
 angular.module('copayApp.directives')
+  //.directive('validAddress', ['$rootScope',
+    //function($rootScope) {
   .directive('validAddress', [
-
     function() {
 
       var bitcore = require('bitcore');
@@ -15,6 +16,17 @@ angular.module('copayApp.directives')
             // Is payment protocol address?
             var uri = copay.HDPath.parseBitcoinURI(value);
             if (uri && uri.merchant) {
+              scope.wallet.createPaymentTx(uri.merchant, function(ntxid, ca) {
+                var txp = scope.wallet.txProposals.txps[ntxid];
+                if (!txp) return;
+                var total = txp.merchant.total;
+                console.log('TOTAL:');
+                console.log(total);
+                var sendForm = angular.element(document).find('[name=sendForm]');
+                var amount = angular.element(sendForm).find('#amount')
+                amount.prop('disabled', true);
+                amount.val(total);
+              });
               ctrl.$setValidity('validAddress', true);
               return 'Merchant: '+ uri.merchant;
             }
diff --git a/js/models/core/HDPath.js b/js/models/core/HDPath.js
index e589ef71e..919bc8e22 100644
--- a/js/models/core/HDPath.js
+++ b/js/models/core/HDPath.js
@@ -59,6 +59,7 @@ HDPath.parseBitcoinURI = function(uri) {
   var splitQuestion = data.split('?');
   ret.address = splitQuestion[0];
 
+/*
   if (splitQuestion.length > 1) {
     var search = splitQuestion[1];
     data = JSON.parse('{"' + search.replace(/&/g, '","').replace(/=/g, '":"') + '"}',
@@ -69,6 +70,26 @@ HDPath.parseBitcoinURI = function(uri) {
                       ret.message = data.message;
     ret.merchant = data.r;
   }
+*/
+
+  if (splitQuestion.length > 1) {
+    var data = {};
+    var search = splitQuestion[1];
+    var parts = search.split('&');
+    var part;
+    var i = 0;
+    for (; i < parts.length; i++) {
+      part = parts[i].split('=');
+      if (part[0] === '') {
+        data[part[1]] = part[1];
+      } else {
+        data[part[0]] = decodeURIComponent(part[1]);
+      }
+    }
+    ret.amount = parseFloat(data.amount);
+    ret.message = data.message;
+    ret.merchant = data.r;
+  }
 
   return ret;
 };
diff --git a/js/models/core/Wallet.js b/js/models/core/Wallet.js
index 5bccd710c..7939be71d 100644
--- a/js/models/core/Wallet.js
+++ b/js/models/core/Wallet.js
@@ -25,6 +25,91 @@ var TxProposals = require('./TxProposals');
 var PrivateKey = require('./PrivateKey');
 var copayConfig = require('../../../config');
 
+if (typeof angular !== 'undefined') {
+  var $http = angular.bootstrap().get('$http');
+}
+
+var $http = function $http(options, callback) {
+  if (typeof options === 'string') {
+    options = { uri: options };
+  }
+
+  options.method = options.method || 'GET';
+  options.headers = options.headers || {};
+
+  var ret = {
+    success: function(cb) {
+      this._success = cb;
+      return this;
+    },
+    error: function(cb) {
+      this._error = cb;
+      return this;
+    },
+    _success: function() {
+      ;
+    },
+    _error: function(_, err) {
+      throw err;
+    }
+  };
+
+  var method = (options.method || 'GET').toUpperCase();
+  var uri = options.uri || options.url;
+  var req = options;
+
+  req.headers = req.headers || {};
+  req.body = req.body || {};
+
+  if (typeof XMLHttpRequest !== 'undefined') {
+    var xhr = new XMLHttpRequest();
+    xhr.open(method, uri, true);
+
+    Object.keys(options.headers).forEach(function(key) {
+      var val = options.headers[key];
+      if (key === 'Content-Length') return;
+      if (key === 'Content-Transfer-Encoding') return;
+      xhr.setRequestHeader(key, val);
+    });
+
+    // For older browsers:
+    // xhr.overrideMimeType('text/plain; charset=x-user-defined');
+
+    // Newer browsers:
+    xhr.responseType = 'arraybuffer';
+
+    xhr.onload = function(event) {
+      var response = xhr.response;
+      var buf = new Uint8Array(response);
+      // return callback(null, xhr, buf);
+      var headers = {};
+      (xhr.getAllResponseHeaders() || '').replace(
+        /(?:\r?\n|^)([^:\r\n]+): *([^\r\n]+)/g,
+        function($0, $1, $2) {
+          headers[$1.toLowerCase()] = $2;
+        }
+      );
+      return ret._success(buf, xhr.status, headers, options);
+    };
+
+    xhr.onerror = function(event) {
+      return ret._error(null, event, null, options);
+    };
+
+    if (options.body) {
+      xhr.send(options.body);
+    } else {
+      xhr.send(null);
+    }
+
+    return ret;
+  }
+
+  // require('request')(options, callback);
+
+  return ret;
+}
+
 function Wallet(opts) {
   var self = this;