import { FetchClient } from '../http';
export interface UrlSignOptions {
    httpClient: FetchClient;
    baseURI: string;
}
export type SignUrlPayload = {
    url: string;
    username: string;
    publicToken?: string;
    publicLinkPassword?: string;
};
export declare class UrlSign {
    private httpClient;
    private baseURI;
    private signingKey;
    private ALGORITHM;
    private TTL;
    private HASH_LENGTH;
    private ITERATION_COUNT;
    constructor({ httpClient, baseURI }: UrlSignOptions);
    signUrl({ url, username, publicToken, publicLinkPassword }: SignUrlPayload): Promise<string>;
    private getSignKey;
    private createHashedKey;
}