Reading from eventStore using node.js

eventStore.js

var request = require('request');
var async = require('async');

function eventStore() {
	function createEvent(event, body) {
		return {
				data: body,
				type: event.summary				
			};
	}

	function getEvent(event, callback) {
		var requestOptions = optionBuilder(event.id);
		request(requestOptions, function(error, response, body) {
			return callback(error, createEvent(event, body));
		});
	}

	function getEventsInStream(streamName, callback) {
		var requestOptions = optionBuilder("http://localhost:2113/streams/" + streamName);
		request(requestOptions, function(error, response, body) {
			async.map(body.entries, getEvent, callback);
		});
	}

	return {
		getEventsInStream: getEventsInStream
	};
}

var optionBuilder = function(url) {
	var host = url;
	var options = {
		json: true,
		'auth': {
		    'user': 'admin',
		    'pass': 'changeit',
		    'sendImmediately': false
		  },
		url: url,
	};
	return options;
};

module.exports = eventStore();

index.js

var eventStore = require('./eventStore');

exports.index = function(req, res){
	var id = req.params.id;
	eventStore.getEventsInStream("esubs-Guest-form-" + req.params.id, function(err, events) {
		res.send({history: events });	
	});
};