import { Checksum, ChecksumConstructor, Decoder, HashConstructor, SourceData } from "@smithy/types";
export declare class TreeHash implements Checksum {
  private readonly Sha256;
  private readonly fromUtf8;
  private buffer?;
  private collectedHashDigests;
  constructor(Sha256: ChecksumConstructor | HashConstructor, fromUtf8: Decoder);
  private hashBuffer;
  update(data: SourceData): void;
  digest(): Promise<Uint8Array>;
  private convertToBuffer;
  reset(): void;
}