export interface IMiddleware<TConnection> {
    auth?: (clientId: string, request: TConnection) => Promise<void>;
    before?: (clientId: string, request: TConnection) => Promise<void>;
    after?: (clientId: string) => Promise<void>;
}
export declare class Middleware<TConnection> implements IMiddleware<TConnection> {
    constructor(middleware: IMiddleware<TConnection>);
    /**
     * Dummy implementation of middleware functions
     */
    auth(clientId: string, request: TConnection): Promise<void>;
    before(clientId: string, request: TConnection): Promise<void>;
    after(clientId: string): Promise<void>;
}