import crypto from 'crypto';

/**
 * Calculates a Keyed-Hash Message Authentication Code (HMAC) from a message and a key.
 *
 * @param message
 * @param key
 * @return
 */
export function hmac(message: string, key: string): Promise<string> {
  return Promise.resolve(
    crypto.createHmac('sha1', key)
      .update(message)
      .digest('hex'),
  );
}