/**
 * @license Copyright (c) 2003-2026, CKSource Holding sp. z o.o. All rights reserved.
 * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-licensing-options
 */
/**
 * @module cloud-services/uploadgateway/uploadgateway
 */
import { FileUploader } from './fileuploader.js';
import type { InitializedToken } from '../token/token.js';
/**
 * UploadGateway abstracts file uploads to CKEditor Cloud Services.
 */
export declare class UploadGateway {
    /**
     * CKEditor Cloud Services access token.
     */
    private readonly _token;
    /**
     * CKEditor Cloud Services API address.
     */
    private readonly _apiAddress;
    /**
     * Creates `UploadGateway` instance.
     *
     * @param token Token used for authentication.
     * @param apiAddress API address.
     */
    constructor(token: InitializedToken, apiAddress: string);
    /**
     * Creates a {@link module:cloud-services/uploadgateway/fileuploader~FileUploader} instance that wraps
     * file upload process. The file is being sent at a time when the
     * {@link module:cloud-services/uploadgateway/fileuploader~FileUploader#send} method is called.
     *
     * ```ts
     * const token = await Token.create( 'https://token-endpoint' );
     * new UploadGateway( token, 'https://example.org' )
     * 	.upload( 'FILE' )
     * 	.onProgress( ( data ) => console.log( data ) )
     * 	.send()
     * 	.then( ( response ) => console.log( response ) );
     * ```
     *
     * @param {Blob|String} fileOrData A blob object or a data string encoded with Base64.
     * @returns {module:cloud-services/uploadgateway/fileuploader~FileUploader} Returns `FileUploader` instance.
     */
    upload(fileOrData: string | Blob): FileUploader;
}