Обработка ошибок

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{
  "statusCode": 400,
  "message": "Invalid QR code format",
  "error": "Bad Request"
}

{
  "statusCode": 400,
  "message": [
    "qrCode must be a string",
    "qrCode should not be empty"
  ],
  "error": "Bad Request"
}

{
  "statusCode": 401,
  "message": "Invalid API key",
  "error": "Unauthorized"
}

{
  "statusCode": 403,
  "message": "IP address not whitelisted",
  "error": "Forbidden"
}

{
  "statusCode": 400,
  "message": "Quote expired",
  "error": "Bad Request"
}

{
  "statusCode": 400,
  "message": "Insufficient balance",
  "error": "Bad Request"
}

{
  "statusCode": 429,
  "message": "Too many requests",
  "error": "Too Many Requests"
}

async function fetchWithRetry(url, options, maxRetries = 3) {
  for (let attempt = 0; attempt < maxRetries; attempt++) {
    try {
      const response = await fetch(url, options);
      
      if (response.ok) {
        return response.json();
      }
      
      if (response.status < 500 && response.status !== 429) {
        // Ошибка клиента — не повторяем
        throw new Error(`Client error: ${response.status}`);
      }
      
      // Серверная ошибка или rate limit — повторяем
      const delay = Math.min(1000 * Math.pow(2, attempt), 10000);
      await new Promise(resolve => setTimeout(resolve, delay));
      
    } catch (error) {
      if (attempt === maxRetries - 1) throw error;
    }
  }
}

function logApiError(response, requestId) {
  console.error({
    timestamp: new Date().toISOString(),
    requestId,
    statusCode: response.statusCode,
    message: response.message,
    error: response.error
  });
}