import { type PairingSession } from "@gryt/crypto";
import type { PairingClock, PairingEndReason } from "./interfaces.js";
import type { PairingRelay, RelayMessage } from "./relayClient.js";
/** Thrown inside a pairing to stop it with a reason the screen can show. */
export declare class PairingEnded extends Error {
    readonly reason: PairingEndReason;
    constructor(reason: PairingEndReason);
}
export declare const systemClock: PairingClock;
export declare function reasonFor(error: unknown): PairingEndReason;
export declare function sealJson(session: PairingSession, value: object): string;
/** The next sealed message as JSON with a `t`, or a throw that ends the pairing as tampered. */
export declare function openJson(session: PairingSession, message: RelayMessage | null, t?: string): Record<string, unknown>;
/** The other side's messages in order, long-polling the relay. `next` gives null once `deadline` passes. */
export declare function mailbox(relay: PairingRelay, id: string, token: string, clock: PairingClock): {
    next(signal: AbortSignal, deadline?: number): Promise<RelayMessage | null>;
};