import { PAIRING_INVITE_TTL_MS, PAIR_TTL_MAX_MS, PAIR_TTL_MIN_MS } from "../vendor/protocol/outer/index.js";
export { PAIRING_INVITE_TTL_MS, PAIR_TTL_MAX_MS, PAIR_TTL_MIN_MS };
export declare const PAIRING_CODE_LENGTH = 8;
export declare const PAIRING_CODE_PATTERN: RegExp;
export declare function clampPairTtlMs(ttlMs: number): number;
export type PairingInvite = Readonly<{
    code: string;
    expiresAt: number;
}>;
export type CodeReservation = Readonly<{
    code: string;
    ownerId: string;
    requestId: string;
}>;
export type CodeReservationResult<T = unknown> = {
    status: "reserved";
    reservation: CodeReservation;
} | {
    status: "committed";
    completion: T;
} | {
    status: "expired" | "consumed" | "unknown";
};
export declare class QRSession {
    private active;
    generateCode(): string;
    issueCode(ttlMs?: number): PairingInvite;
    issueInvite(ttlMs?: number): PairingInvite;
    getActiveInvite(): PairingInvite | null;
    reserveCode<T = unknown>(code: string, ownerId: string, requestId: string): CodeReservationResult<T>;
    commitCode<T>(reservation: CodeReservation, completion: T): boolean;
    releaseCode(reservation: CodeReservation): boolean;
    isReservationCurrent(reservation: CodeReservation): boolean;
    consumeCode(code: string): "ok" | "expired" | "consumed" | "unknown";
    clear(): void;
}
export declare const qrSession: QRSession;
export declare function renderQRAscii(code: string): string;
export declare function displayQR(code: string): void;