promises-ws.js

Bot.prototype.userInfo = function() {
    var that = this
      , deferred = Q.defer()
	  , channel = this.coin === 'usd' ? 'ok_spotusd_userinfo' : 'ok_spotcny_userinfo';

	that.send(channel);

    that.ws.on('message', function(data) {
		var messages = JSON.parse(data.data)
		  , channel = messages[0].channel;

        if (channel === 'ok_spotusd_userinfo' || channel === 'ok_spotcny_userinfo') {
            that.wallet = data;
            deferred.resolve();
        }
    });

    return deferred.promise;
}

that.ws.on('message', function(data) {
var messages = JSON.parse(data.data)
, channel = messages[0].channel;

    if (channel === 'ok_spotusd_userinfo' || channel === 'ok_spotcny_userinfo') {
        Bot.updateWallet(data);
    }

}