import { WSListenCallback } from './PerfectWS.js';
import type { WSDataMiddleware } from './middleware/dataMiddleware.js';
/**
 * A mountable RPC router scope. Create one with `PerfectWS.Router()`, add
 * router-wide middleware with `use()`, and attach children with `mount()`.
 */
export declare class PerfectWSSubRoute {
    _listenForRequests: Map<string, {
        method: string;
        callbacks: WSListenCallback[];
    }>;
    private _protocol;
    private _parent;
    private _mounts;
    private _fullPrefix;
    private _middleware;
    constructor();
    on<Data>(method: string, validator: WSDataMiddleware<Data>, ...callbacks: WSListenCallback<Data>[]): this;
    on(method: string, ...callbacks: WSListenCallback[]): this;
    off(method: string): this;
    /** Add middleware that applies to every route in this router and its descendants. */
    use(...middleware: WSListenCallback[]): this;
    /** Mount a child router under a prefix owned by this parent router. */
    mount(prefix: string, router: PerfectWSSubRoute): this;
    private _validateMount;
    private _getFullMethod;
    private _getMiddleware;
}