X-RateLimit-Limit: 10
X-RateLimit-Remaining: 3
X-RateLimit-Reset: 1708608600

HTTP/1.1 429 Too Many Requests
Retry-After: 60

{
  "error": "Rate limit exceeded",
  "retryAfter": 60,
  "limit": 10,
  "window": "1 minute"
}

// src/lib/rateLimit.ts
interface RateLimitConfig {
  windowMs: number;  // Time window in ms
  maxRequests: number; // Max requests in window
}

const limits: Record<string, RateLimitConfig> = {
  storeMetadata: { windowMs: 60 * 1000, maxRequests: 10 },
  getPolicy: { windowMs: 60 * 1000, maxRequests: 60 },
  verifySiwe: { windowMs: 5 * 60 * 1000, maxRequests: 20 },
  default: { windowMs: 60 * 1000, maxRequests: 100 },
};

async function apiCallWithRetry(url: string, options: RequestInit) {
  const response = await fetch(url, options);

  if (response.status === 429) {
    const data = await response.json();
    const delay = data.retryAfter * 1000;

    console.log(`Rate limited. Retrying after ${delay}ms...`);
    await new Promise(resolve => setTimeout(resolve, delay));

    return apiCallWithRetry(url, options);
  }

  return response;
}