import { S3Client } from "./client";
import { Readable } from "stream";
import { S3UploadFields } from "../../translator/translator";
import { MultiPartFile } from "../client";
/** @internal */
export declare class NodeS3Client extends S3Client {
    protected _upload(url: string, fields: S3UploadFields, file: Readable): Promise<void>;
    download(url: string): Promise<Buffer>;
    wrapMultiPartFile(file: MultiPartFile): Readable;
}