Ошибки и коды

{
  "type": "error",
  "error": {
    "type": "authentication_error",
    "message": "Ключ не найден"
  }
}

async function withBackoff<T>(fn: () => Promise<T>, max = 3): Promise<T> {
  let delay = 1000;
  for (let i = 0; i < max; i++) {
    try { return await fn(); }
    catch (e: any) {
      if (e?.status === 429 && i < max - 1) {
        await new Promise(r => setTimeout(r, delay));
        delay *= 2;
        continue;
      }
      throw e;
    }
  }
  throw new Error("unreachable");
}