v3/packages/api/utils/rate-limiting.ts

import { WrappedKVNamespace } from './kv';

export const useRateLimiter = (
  kv: WrappedKVNamespace,
  key: string,
  timeoutSeconds: number
) => async (): Promise<boolean> => {
  const value = await kv.get<boolean>(key);
  if (value) {
    return true;
  }

  await kv.put(key, true, timeoutSeconds);
  return false;
};