/** Current gateway protocol version emitted by modern clients and servers. */
export declare const PROTOCOL_VERSION: 4;
/** Lowest general client protocol version accepted by the gateway. */
export declare const MIN_CLIENT_PROTOCOL_VERSION: 4;
/** Lowest authenticated node protocol version accepted by the gateway. */
export declare const MIN_NODE_PROTOCOL_VERSION: 3;
/** Lowest lightweight probe protocol version accepted by the gateway. */
export declare const MIN_PROBE_PROTOCOL_VERSION: 3;