import * as http2 from "http2";
import * as http from "http";
import * as https from "https";
import type { UniversalClientFn } from "@connectrpc/connect/protocol";
/**
 * Options for creating an UniversalClientFn using the Node.js `http`, `https`,
 * or `http2` module.
 */
export type NodeHttpClientOptions = {
    /**
     * Use the Node.js `http` or `https` module.
     */
    httpVersion: "1.1";
    /**
     * Options passed to the request() call of the Node.js built-in
     * http or https module.
     */
    nodeOptions?: Omit<http.RequestOptions, "signal"> | Omit<https.RequestOptions, "signal">;
} | {
    /**
     * Use the Node.js `http2` module.
     */
    httpVersion: "2";
    /**
     * A function that must return a session manager for the given URL.
     * The session manager may be taken from a pool.
     * By default, a new Http2SessionManager is created for every request.
     */
    sessionProvider?: (url: string) => NodeHttp2ClientSessionManager;
};
/**
 * Create a universal client function, a minimal abstraction of an HTTP client,
 * using the Node.js `http`, `https`, or `http2` module.
 *
 * @private Internal code, does not follow semantic versioning.
 */
export declare function createNodeHttpClient(options: NodeHttpClientOptions): UniversalClientFn;
/**
 * Manager for a HTTP/2 session.
 */
export interface NodeHttp2ClientSessionManager {
    /**
     * The host this session manager connects to.
     */
    authority: string;
    /**
     * Issue a request.
     */
    request(method: string, path: string, headers: http2.OutgoingHttpHeaders, options: Omit<http2.ClientSessionRequestOptions, "signal">): Promise<http2.ClientHttp2Stream>;
    /**
     * Notify the manager of a successful read from a http2.ClientHttp2Stream.
     */
    notifyResponseByteRead(stream: http2.ClientHttp2Stream): void;
}