#!/usr/bin/env node
export interface DiscoveryServerOptions {
    port: number;
    /** Optional shared secret; clients must echo this in their register message. */
    authToken?: string;
    /**
     * If set, an HTTP `/metrics` server is started on this port exposing a
     * Prometheus exposition of the discovery server's roster + counters.
     */
    metricsPort?: number;
    /**
     * Host/interface to bind the metrics HTTP server to. Ignored when
     * `metricsPort` is unset. When omitted, Node's default is used (`::` on
     * dual-stack systems, falling back to `0.0.0.0`).
     */
    metricsHost?: string;
}
export declare function startDiscoveryServer(opts: DiscoveryServerOptions): {
    close: () => Promise<void>;
};
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