import { TokenStorageStrategy } from "./TokenStorage.js";
export declare class FileStorageStrategy extends TokenStorageStrategy {
    readonly dir: string;
    readonly filePath: string;
    constructor(filename?: string, dir?: string);
    private _ensureDirectoryExists;
    private _readFile;
    private _writeFile;
    getAccessToken(): string | null;
    setAccessToken(token: string | null): void;
    getRefreshToken(): string | null;
    setRefreshToken(token: string | null): void;
    clear(): void;
}