import type { ControlFrame, ControlOutbound, RelayFrame, RouteFrame } from "./types.js";
export declare function isRecord(value: unknown): value is Record<string, unknown>;
export declare function parseJson(value: unknown): unknown;
export declare function decodeRoute(value: unknown): RouteFrame | undefined;
export declare function decodeControlFrame(value: unknown): ControlFrame | undefined;
export declare function decodeRelayFrame(value: unknown): RelayFrame | undefined;
export declare function encodeRoutePayload(payload: Uint8Array | string): string;
export declare function decodeRoutePayload(route: RouteFrame): Uint8Array | undefined;
export declare function encodeControlFrame(frame: ControlOutbound): string;
export declare function decodeChallenge(value: unknown): {
    type: "challenge";
    nonce: string;
} | undefined;