gistfile1.js

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

if (fs.existsSync('servers')) {
  steam.servers = JSON.parse(fs.readFileSync('servers'));
}

var bot = new steam.SteamClient();
bot.logOn('traderbot', 'Batman12345');
bot.on('loggedOn', function(){
  console.log("Logged on...");
	bot.setPersonaState(steam.EPersonaState.Online);
});

bot.on('servers', function(servers) {
  fs.writeFile('servers', JSON.stringify(servers));
});
bot.on('sentry', function(sentry) {
  fs.writeFile('sentry', JSON.stringify(sentry));
});
bot.on('chatInvite', function(chatRoomID, chatRoomName, patronID) {
  console.log('Got an invite to ' + chatRoomName + ' from ' + bot.users[patronID].playerName);
  bot.joinChat(chatRoomID); // autojoin on invite
});
bot.on('message', function(source, message, type, chatter) {
  // respond to both chat room and private messages
  console.log('Received message: ' + message);
  if (message == 'ping') {
    bot.sendMessage(source, 'pong', steam.EChatEntryType.ChatMsg); // ChatMsg by default
  }
  if (message == '/whoami') {
   bot.sendMessage(source, 'You are steam user '+source, steam.EChatEntryType.ChatMsg);
  }
  if (message == '/admin') {
   bot.sendMessage(source, 'Admin features not enabled yet!',steam.EChatEntryType.ChatMsg);
  }
});