Retry request with axios typings

retry.ts

import { AxiosResponse } from 'axios';
import { logger } from 'firebase-functions';

const retryPromise = (
  fn: () => Promise<AxiosResponse>,
  retries = 2,
  err: null | unknown = null
): Promise<AxiosResponse> => {
  logger.log('Retries: ', retries);

  if (!retries) {
    logger.log('Done Retrying...');
    return Promise.reject(err);
  }
  return fn().catch((err) => {
    logger.log('Retrying...');
    return retryPromise(fn, retries - 1, err);
  });
};

export default retryPromise;

// Thanks to https://stackoverflow.com/a/51332115/6608075