export function initDuckDB(duckdbDist: any, options?: {}): Promise<DuckDBClient>;
/**
 * Create a DuckDBClient from a pre-initialized AsyncDuckDB instance.
 *
 * The caller is responsible for:
 * 1. Creating the DuckDB worker, logger, and AsyncDuckDB instance
 * 2. Calling db.instantiate() with the WASM module
 * 3. Passing the db instance here
 *
 * This adapter will handle connection creation and extension loading.
 *
 * @param {object} db - An AsyncDuckDB instance from duckdb-wasm-opfs-tempdir
 * @param {object} [options]
 * @param {string} [options.tempDirectory] - OPFS temp directory path (e.g., 'opfs://tmpdir_xxx')
 * @param {number} [options.memoryLimitMB] - DuckDB memory limit in MB
 * @param {Worker} [options._worker] - Internal: worker reference for terminate()
 * @returns {DuckDBClient}
 */
export function createDuckDBClient(db: object, options?: {
    tempDirectory?: string;
    memoryLimitMB?: number;
    _worker?: Worker;
}): DuckDBClient;
export type DuckDBClient = {
    /**
     *   Execute a SQL query and return a result with .toArray().
     */
    query: (sql: string) => Promise<{
        toArray: () => any[];
    }>;
    /**
     *   Initialize the client (extensions, settings). Idempotent.
     */
    init: () => Promise<void>;
    /**
     *   Kill the DuckDB worker. After this, init() can reinitialize.
     */
    terminate: () => void;
    /**
     *   The underlying DuckDB connection (for direct access when needed).
     */
    conn: object;
    /**
     *   The underlying DuckDB database instance.
     */
    db: object;
};