Private Pub client subscription callback

channel_subscribe_callback.js

// on privatepub this data is sent by server to client
var opts = {
  server: "foo",
  channel: "/hello/world",
  ...
}

// and you can add a subscription callback
// it will take a Faye subscription object. (see http://faye.jcoglan.com/browser/subscribing.html)
opts.subscription = function(subscription) {
    subscription.callback(function() {
      // subscription was successful here.
      // send an initial message on that channel.
      PrivatePub.faye(function(faye){
         faye.send("/hello/world", {text: 'Hey I just connected!'});
      });
   });
}

PrivatePub.sign(options)