import { type StorageBackend } from '../api/storage-backend.js';
import { StorageOperation } from '../api/storage-operation.js';
/**
 * A file storage backend that operates on files within a specified base path. This backend does not support recursive
 * operations into subfolders and only operates on files contained within the specified base path. All directory entries
 * are ignored.
 */
export declare class FileStorageBackend implements StorageBackend {
    readonly basePath: string;
    /**
     * Creates a new file storage backend bound to the specified base path. The basic file storage backend does not support
     * recursive operations into subfolders and only operates on files contained within the specified base path.
     * All directory entries are ignored.
     *
     * @param basePath - The base path to use for all file operations.
     * @throws IllegalArgumentError if the base path is null, undefined, or empty.
     * @throws StorageBackendError if the base path does not exist or is not a directory.
     */
    constructor(basePath: string);
    isSupported(op: StorageOperation): boolean;
    list(): Promise<string[]>;
    readBytes(key: string): Promise<Buffer>;
    writeBytes(key: string, data: Buffer): Promise<void>;
    delete(key: string): Promise<void>;
}