From 878b5aa2da76c25cf9af232caa9c2efc5c5aa8ea Mon Sep 17 00:00:00 2001
From: Iuri Matias <iuri.matias@gmail.com>
Date: Thu, 26 Jan 2017 19:18:53 -0500
Subject: [PATCH] display error in case whisper is not available

---
 demo/app/index.html  |  1 +
 demo/app/js/index.js | 10 +++++++++-
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/demo/app/index.html b/demo/app/index.html
index af92acbb2..417f60960 100644
--- a/demo/app/index.html
+++ b/demo/app/index.html
@@ -75,6 +75,7 @@
 
       </div>
       <div role="tabpanel" class="tab-pane" id="communication">
+        <span class="error">The node you are using does not support whisper</span>
 
         <h3>Listen To channel</h3>
         <div class="form-group form-inline listen">
diff --git a/demo/app/js/index.js b/demo/app/js/index.js
index aa40e01fa..e5a1ebe6b 100644
--- a/demo/app/js/index.js
+++ b/demo/app/js/index.js
@@ -71,7 +71,15 @@ $(document).ready(function() {
 // Communication (Whisper) example
 // ===========================
 $(document).ready(function() {
-  EmbarkJS.Messages.setProvider('whisper');
+
+  $("#communication .error").hide();
+  web3.version.getWhisper(function(err, res) {
+    if (err) {
+      $("#communication .error").show();
+    } else {
+      EmbarkJS.Messages.setProvider('whisper');
+    }
+  });
 
   $("#communication button.listenToChannel").click(function() {
     var channel = $("#communication .listen input.channel").val();