import type { WebPowerSyncDatabase } from '../db/PowerSyncDatabase.js';
/** @internal Called by the database constructor. */
export declare function registerDatabase(db: WebPowerSyncDatabase): void;
/** @internal Called when the database closes. */
export declare function unregisterDatabase(db: WebPowerSyncDatabase): void;
/** The databases currently open in this page. */
export declare function getRegisteredDatabases(): readonly WebPowerSyncDatabase[];
/**
 * Calls `listener` with the current databases now, and again whenever one is opened or closed.
 * Returns a function that stops listening.
 */
export declare function observeRegisteredDatabases(listener: (databases: readonly WebPowerSyncDatabase[]) => void): () => void;