Retry promises (https://gist.github.com/briancavalier/842626)

retry.js

/**
 * Retries the given function until it succeeds given a number of retries and an interval between them. They are set
 * by default to retry 5 times with 1sec in between. There's also a flag to make the cooldown time exponential
 * @param {Function} fn - Returns a promise
 * @param {Number} retriesLeft - Number of retries. If -1 will keep retrying
 * @param {Number} interval - Millis between retries. If exponential set to true will be doubled each retry
 * @param {Boolean} exponential - Flag for exponential back-off mode
 * @return {Promise<*>}
 */
const retryPromise = ({fn, retriesLeft = 5, interval = 1000, exponential = false}) => {
  try {
    return await fn();
  } catch (error) {
    if (retriesLeft) {
      await new Promise(resolve => setTimeout(resolve, interval));
      return retry({fn, retriesLeft: retriesLeft - 1, interval: exponential ? interval * 2 : interval, exponential});
    } else throw new Error('Max retries reached');
  }
}