a.js

var winston             = require('winston');
var steam_user          = require('steam-user');
var tradeoffer_manager  = require('steam-tradeoffer-manager');
var config              = require('./config');
var fs                  = require('fs');
var market              = require('steam-market-pricing');

var logger = new (winston.Logger)({
    transports: [
        new (winston.transports.Console)({
            colorize: true,
            level: 'debug'
        }),
        new (winston.transports.File)({
            level: 'info',
            timestamp: true,
            filename: 'cratedump.log',
            json: false
        })
    ]
});

var client = new steam_user();
var offers = new tradeoffer_manager({
    steam           : client,
    domain          : config.bot.domain,
    language        : 'en',
    pollInterval    : 10000,
    cancelTime      : 300000
});

fs.readFile('polldata.json', function (err, data) {
    if (err) {
        logger.warn('Error reading polldata.json');
    } else {
        logger.debug('Importing previous tradeoffer data');
        offers.pollData = JSON.parse(data);
    }
});

// Login into steam
client.logOn({
    accountName: config.bot.username,
    password: config.bot.password
});

client.on('loggedOn', function (details) {
    logger.info('Logged into steam as ' + client.steamID.getSteam3RenderedID());
    client.setPersona(steam_user.Steam.EPersonaState.Online, config.bot.botName);
});