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