import { FsDuplex } from "./common.js";
import type { JsonLike } from "./json.js";
import type { FsDuplexParty } from "./protocol.js";
export interface FsDuplexBrowserHelper {
    getFileHandle(filename: string): Promise<FileSystemFileHandle>;
    removeFile(filename: string): Promise<void>;
}
export declare class BrowserFsDuplex<T, P extends FsDuplexParty> extends FsDuplex<T, P> {
    private readonly heartbeatWriter;
    private pollerId;
    private isPolling;
    private readonly filepaths;
    private helper;
    constructor(party: P, json: JsonLike, filenamePrefix: string, helper: FsDuplexBrowserHelper);
    start(): Promise<void>;
    stop(): Promise<void>;
    close(reason?: "done" | "error" | "timeout"): void;
    destroy(): Promise<void>;
    private _poll;
}
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