project3.js

const SteamUser = require('steam-user');
const SteamTotp = require('steam-totp');
const SteamCommunity = require('steamcommunity');
const TradeOfferManager = require('steam-tradeoffer-manager');
const config = require('./config.json');

const client = new SteamUser();
const community = new SteamCommunity();
const manager = new TradeOfferManager({
  steam: client,
  community: community,
  language: 'en'
});

const logOnOptions = {
  accountName: config.username,
  password: config.password,
  twoFactorCode: SteamTotp.generateAuthCode(config.sharedSecret)
};

client.logOn(logOnOptions);

client.on('loggedOn', () => {
  console.log('Logged into Steam');

  client.setPersona(SteamUser.EPersonaState.Online);
  client.gamesPlayed(440);
});

client.on('webSession', (sessionid, cookies) => {
  manager.setCookies(cookies);

  community.setCookies(cookies);
  community.startConfirmationChecker(10000, config.idSecret);
});

manager.on('newOffer', offer => {
  if (offer.itemsToGive.length === 0) {
    offer.accept((err, status) => {
      if (err) {
        console.log(err);
      } else {
        console.log(`Donation accepted. Status: ${status}.`);
      }
    });
  } else {
    offer.decline(err => {
      if (err) {
        console.log(err);
      } else {
        console.log('Donation declined (wanted our items).');
      }
    });
  }
});