import { type ServerAdapter, type WebSocketUpgrade, type WebSocketUpgradeOptions } from "../../base.js";
import { DeferredWebSocket } from "../shared/deferred-websocket.js";
import type { WSWebSocket } from "./types.js";
export declare function resolveNodeWebSocketUpgradeHeaders(request: Request, options?: WebSocketUpgradeOptions): Headers;
export declare class NodeServerAdapter implements ServerAdapter {
    private readonly upgradedRequests;
    upgradeWebSocket(request: Request, options?: WebSocketUpgradeOptions): WebSocketUpgrade;
}
export declare class NodeWebSocket extends DeferredWebSocket {
    constructor();
    _attachRealSocket(ws: WSWebSocket): void;
    _emitError(error: Error): void;
}
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