export declare const TIKTOK_BROWSER_BRIDGE_VERSION = "normal-chrome-v1";
export declare const TIKTOK_BROWSER_LEASE_VERSION = "tiktok-browser-lease-v1";
export type TikTokBrowserLeaseStatus = {
    state: "available" | "owned" | "occupied";
    commandPending: boolean;
    expiresInMs: number;
};
export type BrowserCommand = {
    id: string;
    sessionId: string;
    action: "prepare" | "snapshot" | "advance" | "close" | "download-reference";
    query?: string;
    navigate?: boolean;
    sourceUrl?: string;
    expiresAt: number;
};
/** The paired website relays bounded commands. The extension never receives the Agent token. */
export declare class TikTokBrowserBridge {
    private timeoutMs;
    private now;
    private owner;
    private seenAt;
    private pending?;
    private lastAck;
    browserOpen: boolean;
    constructor(timeoutMs?: number, now?: () => number);
    ownedBy(clientId: string): boolean;
    status(clientId?: string): TikTokBrowserLeaseStatus;
    claim(clientId: string): void;
    release(clientId: string): boolean;
    assertOwner(clientId: string): void;
    poll(clientId: string): BrowserCommand | null;
    acknowledge(clientId: string, id: string, result: unknown, error?: string): void;
    request(sessionId: string, action: BrowserCommand["action"], options?: Pick<BrowserCommand, "query" | "navigate" | "sourceUrl">): Promise<unknown>;
    cancel(): void;
}