import type { ClientFrame, ServerFrame } from './frames.js';
export type AnyFrame = ClientFrame | ServerFrame;
/** True if a decoded frame is one a client is allowed to send. The server uses
 *  this to reject server-only frame types before dispatch, so a malicious or
 *  buggy client can't reach an unexpected handler path. */
export declare function isClientFrame(frame: AnyFrame): frame is ClientFrame;
/** Encode a frame to a binary msgpack payload for the wire. */
export declare function encodeFrame(frame: AnyFrame): Uint8Array;
/** Decode a binary payload into a frame. Returns null on any malformed input or
 *  anything lacking a string `type`, so a bad frame can never crash the handler
 *  — the boundary validates `type` before trusting the rest. */
export declare function decodeFrame(bytes: Uint8Array): AnyFrame | null;