export declare type SourceData = string | ArrayBuffer | ArrayBufferView;

export interface Hash {
    
    update(toHash: SourceData, encoding?: "utf8" | "ascii" | "latin1"): void;
    
    digest(): Promise<Uint8Array>;
}

export interface HashConstructor {
    new (secret?: SourceData): Hash;
}

export interface StreamHasher<StreamType = any> {
    (hashCtor: HashConstructor, stream: StreamType): Promise<Uint8Array>;
}

export interface randomValues {
    (byteLength: number): Promise<Uint8Array>;
}