/** Round-trip probes on the own transport (GRYT-1836). A FLAG_PROBE packet carries one of these instead of Opus, under
    the last audio packet's seq, so a client from before drops it as a duplicate or a late one. */
export declare const PROBE_PING = 1;
export declare const PROBE_PONG = 2;
/** How often a sender pings, while it's sending. */
export declare const PROBE_EVERY_S = 1;
/** A ping asks everyone to answer with its nonce; a pong says how long the answerer held it, in ms. */
export type Probe = {
    kind: typeof PROBE_PING;
    nonce: number;
} | {
    kind: typeof PROBE_PONG;
    nonce: number;
    holdMs: number;
};
export declare function writeProbe(p: Probe): Uint8Array;
export declare function readProbe(bytes: Uint8Array): Probe | null;