import { SafeUrl } from '../../types';
/**
 * Comprehensive URL validation with security checks.
 */
export declare function validateUrlInput(url: string): string;
/**
 * Validate image URL with additional security checks.
 */
export declare function validateImageUrl(imageUrl: string): string;
/**
 * Validate and sanitize URL.
 */
export declare function sanitizeUrl(url: string): SafeUrl;