async function resolveDomain(domain) {
  const dohServer = process.env.UNENV_DOH_URL || 'https://cloudflare-dns.com/dns-query';
  const url = `${dohServer}?name=${domain}&type=A`;
  try {
    const response = await fetch(url, {
      headers: {
        'Accept': 'application/dns-json'
      }
    });
    if (!response.ok) {
      throw new Error(`HTTP error! Status: ${response.status}`);
    }
    const { Answer = [] } = await response.json();
    return Answer;
  } catch (error) {
    console.error('Error resolving domain:', error);
  }
}

// Usage example
resolveDomain('example.com').then(data => console.log(data));