/// <reference types="node" />
import { Readable } from "stream";
import { AbstractSynchronizer } from "../AbstractSynchronizer";
import { Watcher } from "../Watcher";
export declare class ValidatorStream extends Readable {
    private localNumber;
    private to;
    private toHash;
    private syncStrategy;
    private watcher;
    private fsSynchronizer;
    private numberOfChunksToDownload;
    private currentChunkNumber;
    private chunks;
    private dowloading;
    private cacheLevelValidationPromise;
    private bestDownloaded;
    constructor(localNumber: number, to: number, toHash: string, syncStrategy: AbstractSynchronizer, watcher: Watcher);
    private downloadBlock;
    private getBlockFromCache;
    _read(size: number): void;
    private validateCacheLevel;
}