package main

import (
	"fmt"
	"net"
)

/* DNS RESOLVER */

func resolveDomain(domain string) (string, error) {
	ips, err := net.LookupIP(domain)
	if err != nil {
		return "", err
	}

	// Возвращаем первый IPv4 адрес
	for _, ip := range ips {
		if ipv4 := ip.To4(); ipv4 != nil {
			return ipv4.String(), nil
		}
	}

	return "", fmt.Errorf("no IPv4 address found for %s", domain)
}