import fs from 'fs';
import { type ImageCacheHandler } from '../data.js';
export declare class FileSystemCache implements ImageCacheHandler {
    useRedirects: boolean;
    private cachePath;
    constructor(cacheDir: string);
    getKey(hash: string): Promise<{
        value: fs.ReadStream | null;
        ttl?: number;
    }>;
    setKey(hash: string, value: NodeJS.ReadableStream | Buffer, ttl?: number, contentType?: string): Promise<void>;
    delKey(hash: string): Promise<void>;
    getPublicUrl(hash: string): Promise<{
        url: string | null;
        ttl?: number;
    }>;
    private getMetadataPath;
}
export default function createFileSystemCache(cacheDir: string): ImageCacheHandler;