import { IStorageAdapter, UploadOptions, DownloadOptions, ListOptions, StorageObject, DeleteOptions, PresignedUrlOptions } from '../storage.interface';
import { Readable } from 'stream';
export interface S3Config {
    endpoint?: string;
    region?: string;
    bucket: string;
    accessKeyId: string;
    secretAccessKey: string;
    forcePathStyle?: boolean;
}
export declare class S3StorageAdapter implements IStorageAdapter {
    private readonly logger;
    private readonly client;
    private readonly bucket;
    constructor(config: S3Config);
    uploadStream(stream: Readable, options: UploadOptions): Promise<{
        key: string;
        etag?: string;
    }>;
    downloadStream(options: DownloadOptions): Promise<Readable>;
    listObjects(options?: ListOptions): Promise<StorageObject[]>;
    deleteObject(options: DeleteOptions): Promise<void>;
    generatePresignedUrl(options: PresignedUrlOptions): Promise<string>;
    objectExists(key: string): Promise<boolean>;
    private getFriendlyError;
}