export async function retry(callback, shouldRetry, delay) {
  while (true) {
    try {
      return await callback();
    } catch (err) {
      if (shouldRetry(err)) {
        await delay();
      } else {
        throw err;
      }
    }
  }
}

export function timedDelay(millis) {
  return async () => await sleep(millis);
}

function sleep(millis) {
  return new Promise((resolve) => setTimeout(resolve, millis));
}