Migrate plugins to lib directory

lib/plugins/common/bitstamp.js

@@ -0,0 +1,81 @@
+'use strict'
+
+const querystring = require('querystring')
+const axios = require('axios')
+const crypto = require('crypto')
+const _ = require('lodash')
+
+const API_ENDPOINT = 'https://www.bitstamp.net/api/v2'
+
+let counter = -1
+let lastTimestamp = Date.now()
+
+function pad (num) {
+  const asString = num.toString(10)
+  if (num < 10) return '00' + asString
+  if (num < 100) return '0' + asString
+  return asString
+}
+
+function generateNonce () {
+  const timestamp = Date.now()
+  if (timestamp !== lastTimestamp) counter = -1
+  lastTimestamp = timestamp
+  counter = (counter + 1) % 1000
+  return timestamp.toString(10) + pad(counter)
+}
+
+function authRequest (config, path, data) {
+  if (!config.key || !config.secret || !config.clientId) {
+    const err = new Error('Must provide key, secret and client ID')
+    return Promise.reject(err)
+  }
+
+  data = data || {}
+
+  const nonce = generateNonce()
+  const msg = [nonce, config.clientId, config.key].join('')
+
+  const signature = crypto
+  .createHmac('sha256', Buffer.from(config.secret))
+  .update(msg)
+  .digest('hex')
+  .toUpperCase()
+
+  _.merge(data, {
+    key: config.key,
+    signature: signature,
+    nonce: nonce
+  })
+
+  return request(path, 'POST', data)
+}
+
+function buildMarket (fiatCode, cryptoCode) {
+  if (cryptoCode !== 'BTC') throw new Error('Unsupported crypto: ' + cryptoCode)
+  if (fiatCode === 'USD') return 'btcusd'
+  if (fiatCode === 'EUR') return 'btceur'
+  throw new Error('Unsupported fiat: ' + fiatCode)
+}
+
+function request (path, method, data) {
+  const options = {
+    method: method,
+    url: API_ENDPOINT + path + '/',
+    headers: {
+      'User-Agent': 'Mozilla/4.0 (compatible; Lamassu client)',
+      'Content-Type': 'application/x-www-form-urlencoded'
+    }
+  }
+
+  if (data) options.data = querystring.stringify(data)
+
+  return axios(options)
+  .then(r => r.data)
+}
+
+module.exports = {
+  authRequest,
+  request,
+  buildMarket
+}