interface OTPOptions {
    name: string;
    keySize: number;
    codeLength: number;
    secret: string;
    epoch: number;
    timeSlice: number;
}
export declare class OTP {
    #private;
    constructor(options?: Partial<OTPOptions>);
    readonly hotp: (counter: number) => Promise<string>;
    readonly totp: (now: number) => Promise<string>;
    get name(): string;
    get secret(): string;
    get totpURL(): string;
    get hotpURL(): string;
    [Symbol.toStringTag](): string;
    toJSON(): {
        class: string;
    } & OTPOptions;
    static reviveJSON(_: string, val: any): any;
    static readonly classID = "OTP{@pipobscure}";
    static parse(urlstr?: string, options?: Partial<OTPOptions>): OTP;
}
export default OTP;
export declare function encodeChunk(data: Uint8Array): string;
export declare function encode(data: Uint8Array): string;
export declare function decodeChunk(data: string[], dest: Uint8Array): void;
export declare function decode(data: string): Uint8Array<ArrayBuffer>;