b254f7f2be
* Initial itBit implementation * Add tests for calculatePrice in exchange/itbit.js * Add etherium to supported crypto codes in common/itbit.js * Apply standardjs to itbit files * itbit trade test. not important * test getCurrencyRates in ticker/itbit.js
92 lines
2.6 KiB
JavaScript
92 lines
2.6 KiB
JavaScript
'use strict'
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const querystring = require('querystring')
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const axios = require('axios')
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const crypto = require('crypto')
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const _ = require('lodash/fp')
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const API_ENDPOINT = 'https://api.itbit.com/v1'
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let counter = -1
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let lastTimestamp = Date.now()
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function generateNonce () {
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const timestamp = Date.now()
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if (timestamp !== lastTimestamp) counter = -1
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lastTimestamp = timestamp
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counter = (counter + 1) % 1000
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return timestamp.toString() + counter.toString()
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}
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function authRequest (account, method, path, data) {
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if (!account.userId || !account.walletId || !account.clientKey || !account.clientSecret) {
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const err = new Error('Must provide user ID, wallet ID, client key, and client secret')
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return Promise.reject(err)
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}
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const url = buildURL(method, path, data)
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const dataString = method !== 'GET' && !_.isEmpty(data) ? JSON.stringify(data) : ''
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const nonce = generateNonce()
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const timestamp = Date.now()
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const message = nonce + JSON.stringify([method, url, dataString, nonce.toString(), timestamp.toString()])
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const hashBuffer = crypto
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.createHash('sha256')
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.update(message).digest()
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const bufferToHash = Buffer.concat([Buffer.from(url), hashBuffer])
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const signature = crypto
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.createHmac('sha512', Buffer.from(account.clientSecret))
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.update(bufferToHash)
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.digest('base64')
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return request(method, path, data, {
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'Authorization': account.clientKey + ':' + signature,
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'X-Auth-Timestamp': timestamp,
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'X-Auth-Nonce': nonce
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})
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}
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function request (method, path, data, auth) {
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const options = {
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method: method,
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url: buildURL(method, path, data),
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headers: {
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'User-Agent': 'Lamassu itBit node.js client',
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...(auth)
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},
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...(method !== 'GET' && { data: data })
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}
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return axios(options)
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.then(r => r.data)
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.catch(e => {
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var description = _.get(e, 'response.data.description')
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throw new Error(description || e.message)
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})
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}
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const cryptoCodeTranslations = { 'BTC': 'XBT', 'ETH': 'ETH' }
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function buildMarket (fiatCode, cryptoCode) {
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const translatedCryptoCode = cryptoCodeTranslations[cryptoCode]
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if (!translatedCryptoCode) {
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throw new Error('Unsupported crypto: ' + cryptoCode)
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}
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if (!_.includes(fiatCode, ['USD', 'EUR', 'SGD'])) {
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throw new Error('Unsupported fiat: ' + fiatCode)
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}
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return translatedCryptoCode + fiatCode
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}
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function buildURL (method, path, data) {
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let url = API_ENDPOINT + path
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if (method === 'GET' && !_.isEmpty(data)) {
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url += '?' + querystring.stringify(data)
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}
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return url
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}
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module.exports = { authRequest, request, buildMarket }
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