import type { DatabaseSync } from 'node:sqlite';
type Owner = {
    ownerId: string;
    workspaceId: string;
};
/** User subscriptions share the same durable delivery ledger as every browser transport. */
export declare class BrowserSubscriptionService {
    private readonly db;
    private readonly clock;
    constructor(db: DatabaseSync, clock?: () => number);
    prepare(): {
        publicKey: string;
    };
    register(owner: Owner, value: unknown): {
        id: string;
    };
    remove(owner: Owner, id: string): void;
}
export declare function enqueueBrowserDispatches(db: DatabaseSync, owner: Owner, notificationId: string, subjectId: string | null, revision: number, now: number): void;
export {};