/**
 * NIP-05 utility functions for resolving nostr identifiers
 */
/**
 * Resolves a NIP-05 identifier to a nostr public key
 * Includes input validation and request timeout for security
 *
 * @param nip05 - NIP-05 identifier in format username@domain.com
 * @param timeoutMs - Timeout in milliseconds (default: 5000)
 * @returns Resolved public key
 * @throws Error if validation fails, timeout occurs, or resolution fails
 */
export declare function resolveNip05(nip05: string, timeoutMs?: number): Promise<string>;