import "../_dnt.polyfills.js";
import * as $ from "../deps/scale.js";
export declare abstract class Hasher {
    abstract create(): Hashing;
    abstract digestLength: number;
    abstract concat: boolean;
    $hash<I, O>($inner: $.Codec<I, O>): $.Codec<I, O>;
    hash(data: Uint8Array): Uint8Array;
}
export declare function $hash<I, O>(hasher: Hasher, $inner: $.Codec<I, O>): $.Codec<I, O>;
export declare class Blake2Hasher extends Hasher {
    concat: boolean;
    digestLength: number;
    constructor(size: 64 | 128 | 256 | 512, concat: boolean);
    create(): Hashing;
}
export declare class IdentityHasher extends Hasher {
    digestLength: number;
    concat: boolean;
    create(): Hashing;
    $hash<I, O>($inner: $.Codec<I, O>): $.Codec<I, O>;
    hash(data: Uint8Array): Uint8Array;
}
export declare class TwoxHasher extends Hasher {
    concat: boolean;
    digestLength: number;
    rounds: number;
    constructor(size: 64 | 128 | 256, concat: boolean);
    create(): Hashing;
}
export interface Hashing {
    update(data: Uint8Array): void;
    digestInto(array: Uint8Array): void;
    dispose?(): void;
}
export declare const blake2_64: Blake2Hasher;
export declare const blake2_128: Blake2Hasher;
export declare const blake2_128Concat: Blake2Hasher;
export declare const blake2_256: Blake2Hasher;
export declare const blake2_512: Blake2Hasher;
export declare const identity: IdentityHasher;
export declare const twox128: TwoxHasher;
export declare const twox256: TwoxHasher;
export declare const twox64Concat: TwoxHasher;
export declare class DecodeNonTransparentKeyError extends Error {
    readonly name = "DecodeNonTransparentKeyError";
}