import { Checksum, Hash } from "@aws-sdk/types";
import { Writable, WritableOptions } from "stream";
export declare class HashCalculator extends Writable {
  readonly hash: Checksum | Hash;
  constructor(hash: Checksum | Hash, options?: WritableOptions);
  _write(
    chunk: Buffer,
    encoding: string,
    callback: (err?: Error) => void
  ): void;
}