import EventEmitter from 'events';
import fs from 'fs';
import { NodeFileSystem } from '../storage/interfaces/NodeFileSystem.js';
import { ChunkSink } from './chunkifier.js';
interface FileChunkSinkOptions {
    /**
     * Maximum number of files.
     */
    readonly maxFiles: number;
    /**
     * Full path to the chunk file.
     */
    readonly file: (n: number) => string;
    /**
     * File system implementation to use.
     */
    readonly fs: NodeFileSystem;
}
/**
 * Chunk sink which writes data to disk.
 *
 * Each time a new chunk is created, a new stream is created with path provided from options.
 */
export declare class FileChunkSink extends EventEmitter {
    private readonly _options;
    private readonly _streamTracker;
    /**
     * Returns all files that have been written to and are not deleted.
     */
    get files(): readonly fs.WriteStream[];
    constructor(_options: FileChunkSinkOptions);
    /**
     * Returns `ChunkSink`. Pass this to `chunkifier`.
     */
    getSink(): ChunkSink<fs.WriteStream>;
    private createStream;
    private emitDeleteOrDelete;
}
export {};