bitfinex-api-example.js

const request = require('request')
const crypto = require('crypto')

const url = 'https://api.bitfinex.com/v1'
const apiKey = '<Your API key here>'
const apiSecret = '<Your API secret here>'
const payload = {
  'request': '/v1/account_infos',
  'nonce': Date.now().toString()
}

const body = new Buffer(JSON.stringify(payload))
  .toString('base64')

const signature = crypto
  .createHmac('sha384', apiSecret)
  .update(body)
  .digest('hex')

const headers = {
  'X-BFX-APIKEY': apiKey,
  'X-BFX-PAYLOAD': body,
  'X-BFX-SIGNATURE': signature
}

const options = {
  url: `${url}/account_infos`,
  headers,
  body
}

request.post(options, (error, response, body) => console.log(body))