import { DeepstreamPlugin, DeepstreamAuthentication } from '@deepstream/types';
import { JSONObject } from '../../../constants';
/**
 * The open authentication handler allows every client to connect.
 * If the client specifies a username as part of its authentication
 * data, it will be used to identify the user internally
 */
export declare class OpenAuthentication extends DeepstreamPlugin implements DeepstreamAuthentication {
    description: string;
    /**
    * Grants access to any user. Registers them with username or open
    */
    isValidUser(connectionData: JSONObject, authData: JSONObject): Promise<{
        isValid: boolean;
        id: string;
    }>;
}