import { IStorageService, UploadResponse, DeleteResponse, FileUpload } from './storage.interface';
export declare class StorageService implements IStorageService {
    /**
     * Uploads a file to Cloudinary using a stream.
     * @param file - The file to upload, provided as a FileUpload object.
     * @param options - Optional Cloudinary upload options (e.g., folder, tags).
     * @returns A promise resolving to the upload response containing file details.
     * @throws Error if the upload fails or no result is returned from Cloudinary.
     */
    uploadFile(file: FileUpload, options?: {
        folder?: string;
        tags?: string[];
    }): Promise<UploadResponse>;
    /**
     * Deletes a file from Cloudinary using its public ID.
     * @param publicId - The public ID of the file to delete.
     * @returns A promise resolving to the deletion response.
     * @throws Error if the deletion fails.
     */
    deleteFile(publicId: string): Promise<DeleteResponse>;
}