/// <reference types="node" />
import { IAsyncReader } from "./IAsyncReader.js";
import { IPeekableAsyncReader } from "./IPeekableAsyncReader.js";
/**
 * Layer on AsyncReader that reads in chunks to improve performance (especially if the Readable is a file stream)
 */
export declare class AsyncChunkReader extends IPeekableAsyncReader {
    reader: IAsyncReader;
    chunkSize: number;
    buffer: Buffer;
    bufferPos: number;
    position: number;
    constructor(reader: IAsyncReader, chunkSize: number);
    readChunk: () => Promise<void>;
    isAtEnd(): boolean;
    getPosition(): number;
    /** Closes the stream, after which no further reading is allowed */
    close: () => Promise<void>;
    checkBuffer(len: any): Promise<void>;
    /** Returns a string containing len bytes but doesn't advance the read position pointer
     * @param len Number of bytes to peeked
     */
    peek(len: any): Promise<Buffer>;
    /** Returns a string containing len bytes
     * @param len Number of bytes to read
     */
    read(len: any): Promise<Buffer>;
}