import { TLDEntry } from './types/TLD';
/**
 * Validates and normalizes domain names and durations for registration.
 * @param entries
 */
export declare function normalizeDomainEntries(entries: TLDEntry | Array<TLDEntry>): Array<TLDEntry>;
/**
 * Validates and normalizes registration duration.
 * @param duration - duration in seconds
 */
export declare function normalizeDuration(duration: any): number;