import { StorageBackend, StorageResult, LocalStorageConfig } from './base';
export declare class LocalStorageBackend implements StorageBackend {
    private config;
    readonly type: "local";
    readonly hasPublicUrl = false;
    private basePath;
    constructor(config: LocalStorageConfig);
    init(): Promise<void>;
    upload(buffer: Buffer, filename: string): Promise<StorageResult>;
    uploadStream(stream: NodeJS.ReadableStream, filename: string): Promise<StorageResult>;
    download(key: string): Promise<Buffer>;
    downloadStream(key: string): NodeJS.ReadableStream;
    delete(key: string): Promise<void>;
    exists(key: string): Promise<boolean>;
}