import { connect } from 'node:http2';
import type { Quad9TransportResponse } from './quad9-transport.cjs';
/**
 * Server-runtime RFC 8484 transport.
 *
 * Quad9 currently rejects HTTP/1.1 with 505. Node and Bun Fetch use HTTP/1.1
 * for this endpoint, so server bundles select this HTTP/2 adapter while web
 * bundles keep the portable Fetch implementation.
 */
export declare function requestQuad9(baseUrl: string, query: Uint8Array, signal?: AbortSignal, connectHttp2?: typeof connect): Promise<Quad9TransportResponse>;