import { Server as HttpServer } from 'node:http';
export interface ElectionOpts {
    host: string;
    port: number;
    /**
     * FP-B3: max time to wait for `server.listen()` to emit either
     * `listening` or `error`. A port stuck in a bad state can leave
     * `listen()` hanging forever — neither event fires — which wedges the
     * first verb's `ensureConnected` indefinitely. When the timer fires
     * first we reject with a clear error so the caller can surface it
     * instead of hanging. Defaults to 5000ms. The fast EADDRINUSE path is
     * unaffected (it fires `error` synchronously-ish, well inside the
     * window). Set to `0` to disable the timeout.
     */
    bindTimeoutMs?: number;
}
export type ElectionResult = {
    role: 'host';
    server: HttpServer;
} | {
    role: 'peer';
};
/**
 * Try to bind the WS port. If it succeeds, we're the concentrator (host).
 * If EADDRINUSE, someone else won — we'll dial them as a peer instead.
 *
 * The HTTP server is returned because @fetchproxy/server's WS server attaches
 * to it directly (no second bind). The caller closes the server on shutdown.
 */
export declare function electRole(opts: ElectionOpts): Promise<ElectionResult>;