var fs = require('fs');
var steam = require('steam');

var bot = new steam.SteamClient();

var sentryFile = 'sentry';
var sentry;
if (fs.existsSync(sentryFile)) {
    sentry = fs.readFileSync(sentryFile);
}

bot.logOn({ accountName: 'botName', password: 'botPass', authCode: 'botAuth', shaSentryfile: sentry });

bot.on('loggedOn', function() {
    bot.joinChat('whateverGroup');
    bot.setPersonaState(steam.EPersonaState.Online);
});

bot.on('chatMsg', function(chatID, message, entryType, userID){
    console.log(bot.chatRooms[chatID]);
});