import { AppError } from '../lib/errors.js';

export function requireIdempotencyKey(req, _res, next) {
  const idempotencyKey = req.get('Idempotency-Key');
  if (!idempotencyKey) {
    return next(new AppError('MISSING_IDEMPOTENCY_KEY', 'Missing Idempotency-Key header', 400));
  }
  req.idempotencyKey = idempotencyKey;
  return next();
}