fix init & event redirection

lib/blockchainmonitor.js

@@ -52,7 +52,7 @@ BlockchainMonitor.prototype.start = function(opts, cb) {
     },
     function(done) {
       self.messageBroker = opts.messageBroker || new MessageBroker(opts.messageBrokerOpts);
-      self.messageBroker.onMessage(_.bind(self.sendEmail, self));
+      self.messageBroker.onMessage(_.bind(self._handleIncommingTx, self));
       done();
     },
     function(done) {
@@ -68,8 +68,6 @@ BlockchainMonitor.prototype.start = function(opts, cb) {
 };
 
 BlockchainMonitor.prototype._initExplorer = function(explorer) {
-  $.checkArgument(explorer.provider == 'insight', 'Blockchain monitor ' + provider + ' not supported');
-
   var self = this;
 
   var socket = explorer.initSocket();