/**
 * useWebRTCIP – detect local/public IPs via WebRTC ICE candidates and STUN.
 * Not highly reliable; use as first-priority hint and fall back to a public IP API (e.g. ipapi.co) if needed.
 * @module useWebRTCIP
 */
export interface UseWebRTCIPOptions {
    /** STUN server URLs (default: Google STUN). */
    stunServers?: string[];
    /** Stop gathering after this many ms (default: 3000). */
    timeout?: number;
    /** Called once per newly detected IP (no duplicates). */
    onDetect?: (ip: string) => void;
}
export interface UseWebRTCIPReturn {
    /** Unique IPv4 addresses found from ICE candidates. */
    ips: string[];
    /** True while ICE gathering is in progress. */
    loading: boolean;
    /** Error message if WebRTC is unavailable or detection fails. */
    error: string | null;
}
/**
 * Attempts to detect client IP addresses using WebRTC ICE candidates and a STUN server.
 * Works frontend-only (no backend). Not guaranteed to return a public IP; use as a hint and
 * fall back to a public IP API (e.g. ipapi.co, ip-api.com) if you need reliability.
 *
 * @param options - Optional: stunServers, timeout (ms), onDetect(ip) callback.
 * @returns { ips, loading, error } – unique IPv4s, loading flag, and error message.
 *
 * @example
 * const { ips, loading, error } = useWebRTCIP({
 *   timeout: 5000,
 *   onDetect: (ip) => console.log('Detected:', ip),
 * })
 * // If ips is empty and error is set, fall back to: fetch('https://api.ipify.org?format=json')
 */
export declare function useWebRTCIP(options?: UseWebRTCIPOptions): UseWebRTCIPReturn;