Algotrading+Realm App Services

gistfile1.txt

exports = async function(arg){
  const crypto = require('crypto');
  const axios = require('axios').default;
  const createCBRequest = (method, path) => {
    // current unix timestamp in seconds (note Date.now() returns milliseconds)
    var cb_access_timestamp = Date.now() / 1000;
    // obtained API key, secret, and passphrase from https://pro.coinbase.com/profile/api
    var cb_access_passphrase = context.values.get('API_PASSPHRASE');
    var cb_api_key = context.values.get('API_KEY');
    var cb_api_secret = context.values.get('API_SECRET');
    var body = ''; // body is empty in this case
    // create the prehash string by concatenating required parts
    var message = cb_access_timestamp + method + path + body;
    // decode the base64 secret
    // NOTE: added .from() to address DeprecationWarning: Buffer() is deprecated
    var key = Buffer.from(cb_api_secret, 'base64');
    // create a sha256 hmac with the secret
    var hmac = crypto.createHmac('sha256', key);
    // sign the require message with the hmac, and finally base64 encode the result
    var cb_access_sign = hmac.update(message).digest('base64');
    const config = {
      method,
      url: `https://api.exchange.coinbase.com${path}`,
      headers: {
        'Content-Type': 'application/json',
        'Content-Length': 0,
        'User-Agent': 'mdb-algorealm',
        'CB-ACCESS-KEY': cb_api_key,
        'CB-ACCESS-PASSPHRASE': cb_access_passphrase,
        'CB-ACCESS-SIGN': cb_access_sign,
        'CB-ACCESS-TIMESTAMP': cb_access_timestamp
      }
    };
  
    return axios(config);
  }
  const response = await createCBRequest('GET', '/oracle');
  return {response: response.data};
};