project2.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);

  sendRandomItem();
});

manager.on('newOffer', offer => {
  if (offer.partner.getSteamID64() === 'your_trusted_account_id') {
    offer.accept((err, status) => {
      if (err) {
        console.log(err);
      } else {
        console.log(`Accepted offer. Status: ${status}.`);
      }
    });
  } else {
    offer.decline(err => {
      if (err) {
        console.log(err);
      } else {
        console.log('Canceled offer from scammer.');
      }
    });
  }
});

function sendRandomItem() {
  const partner = 'partner_steam_id';
  const appid = 440;
  const contextid = 2;

  const offer = manager.createOffer(partner);

  manager.loadInventory(appid, contextid, true, (err, myInv) => {
    if (err) {
      console.log(err);
    } else {
      const myItem = myInv[Math.floor(Math.random() * myInv.length - 1)];
      offer.addMyItem(myItem);

      manager.loadUserInventory(
        partner,
        appid,
        contextid,
        true,
        (err, theirInv) => {
          if (err) {
            console.log(err);
          } else {
            const theirItem =
              theirInv[Math.floor(Math.random() * theirInv.length - 1)];
            offer.addTheirItem(theirItem);

            offer.setMessage(
              `Will you trade your ${theirItem.name} for my ${myItem.name}?`
            );
            offer.send((err, status) => {
              if (err) {
                console.log(err);
              } else {
                console.log(`Sent offer. Status: ${status}.`);
              }
            });
          }
        }
      );
    }
  });
}