declare type SpongePermutator = (data: Uint8Array) => void;
/** Sponge construction option */
export interface SpongeOption {
    bitsize: number;
    rate: number;
    dsbyte: number;
    permutator: SpongePermutator;
}
export declare type Message = string | ArrayBuffer;
/** Sponge construction */
export declare class Sponge {
    #private;
    constructor(option: SpongeOption);
    /** Applies padding to internal state */
    private pad;
    /** Squeezes internal state */
    protected squeeze(length: number): Uint8Array;
    /** Updates internal state by absorbing */
    update(data: Message): this;
    /** Returns the hash in ArrayBuffer */
    digest(): ArrayBuffer;
    /** Returns the hash in given format */
    toString(format?: "hex"): string;
}
export {};