import type * as SQLite from '@journeyapps/wa-sqlite';
import { RawWaSqliteDatabaseOptions } from './RawSqliteConnection.js';
/**
 * List of currently tested virtual filesystems
 */
export declare enum WASQLiteVFS {
    IDBBatchAtomicVFS = "IDBBatchAtomicVFS",
    OPFSCoopSyncVFS = "OPFSCoopSyncVFS",
    AccessHandlePoolVFS = "AccessHandlePoolVFS",
    OPFSWriteAheadVFS = "OPFSWriteAheadVFS",
    /**
     * A virtual file system storing data in-memory only, without persistence.
     *
     * This file system can be used in three configurations:
     *
     * 1. In shared workers (the default when available): All tabs share the same in-memory database, which is cleared
     *    once the last tab is closed.
     * 2. In dedicated workers (used when `enableMultiTabs` is disabled). Each tab has its own in-memory database cleared
     *    when the tab is closed. Queries are offloaded to a dedicated worker.
     * 3. In the context of the tab itself (used when both `enableMultiTabs` and `useWebWorker` are disabled). The per-tab
     *    database is hosted in the tab itself, and queries run synchronously. This is _a lot_ faster than any other
     *    single-threadedVFS, but can block JavaScript for computationally-intensive queries.
     *
     * This VFS primarily intended for development, but it also useful for online-first deployments not syncing large
     * amounts of data, as it is quicker to start up.
     */
    InMemoryVfs = "InMemoryVFS"
}
export declare function vfsRequiresDedicatedWorkers(vfs: WASQLiteVFS): vfs is WASQLiteVFS.OPFSCoopSyncVFS | WASQLiteVFS.AccessHandlePoolVFS | WASQLiteVFS.OPFSWriteAheadVFS;
/**
 * @internal
 */
export type WASQLiteModuleFactoryOptions = {
    dbFileName: string;
    encryptionKey?: string;
};
/**
 * @internal
 */
export type SQLiteModule = Parameters<typeof SQLite.Factory>[0];
/**
 * @internal
 */
export declare function loadModuleAndVfs({ vfs, filename, encryptionKey }: RawWaSqliteDatabaseOptions): Promise<{
    module: SQLiteModule;
    vfs: SQLiteVFS;
}>;