export const sleep = (ms: number) => {
  return new Promise((resolve) => setTimeout(resolve, ms));
};

export async function asyncRunSafe<T = any>(
  fn: Promise<T>,
): Promise<[Error] | [null, T]> {
  try {
    return [null, await fn];
  } catch (e: any) {
    return [e || new Error('unknown error')];
  }
}

export async function fetchWithRetry<T = any>(
  fn: Promise<T>,
  retries = 3,
): Promise<[Error] | [null, T]> {
  const [error, res] = await asyncRunSafe(fn);
  if (error) {
    if (retries > 0) {
      const res = await fetchWithRetry(fn, retries - 1);
      return res;
    } else {
      if (error instanceof Error) return [error];
      return [new Error('unknown error')];
    }
  } else {
    return [null, res];
  }
}