/** @packageDocumentation
 * @module iModelHubClient
 */
import { ClientRequestContext } from "@bentley/bentleyjs-core";
import { IModelClient } from "../IModelClient";
import { FileHandler } from "../imodeljs-clients";
import { AccessToken, AuthorizationToken } from "../Token";
import { IModelBaseHandler } from "./BaseHandler";
/**
 * Class that allows access to different iModelHub class handlers. Handlers should be accessed through an instance of this class, rather than constructed directly.
 * @beta
 */
export declare class IModelHubClient extends IModelClient {
    /**
     * Create an instance of IModelHubClient.
     * @param fileHandler File handler to handle file upload/download and file system operations.
     * @param iModelBaseHandler WSG Client for iModel Hub operations.
     */
    constructor(fileHandler?: FileHandler, iModelBaseHandler?: IModelBaseHandler);
    /**
     * Get the (delegation) access token to access the service
     * @param requestContext The client request context
     * @param authorizationToken Authorization token.
     * @returns Resolves to the (delegation) access token.
     * @throws [[IModelHubClientError]] with [IModelHubStatus.UndefinedArgumentError]($bentley) if authorizationToken is undefined.
     * @throws [[ResponseError]] if request to delegation service failed.
     * @throws Error if failed to parse response.
     * @internal
     */
    getAccessToken(requestContext: ClientRequestContext, authorizationToken: AuthorizationToken): Promise<AccessToken>;
}
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