import { NetMessage } from '../codec/MessageCodec';
export type SendFn = (msg: NetMessage) => void;
export declare class PresenceBroadcaster {
    hz: number;
    private _sendFn;
    private _lastSendMs;
    private _enabled;
    private _scratch;
    constructor(sendFn: SendFn, hz?: number);
    setEnabled(on: boolean): void;
    isEnabled(): boolean;
    /** Call once per frame from the NetSession's update loop. */
    update(nowMs: number): void;
    /** Build a snapshot from the current xb.core state. Returns false if no head pose. */
    private _fillSnapshot;
}