import { type Observable } from "rxjs";
import type { Event } from "../event";
import type { PostMessage, RpcClient } from "./types";
/**
 * Internal factory function to create the recursive RPC client proxy.
 *
 * @remarks
 * This function recursively builds the client object based on the provided configuration.
 * It handles the logic for sending requests, listening for replies, and managing subscriptions.
 *
 * @template Config - The type of the current level of configuration.
 * @param postMessage - Function to send messages to the worker.
 * @param incoming$ - Observable stream of incoming messages from the worker.
 * @returns The constructed client object for the current level.
 */
export declare function createRpcProxy<Config>(postMessage: PostMessage, incoming$: Observable<Event<unknown>>): RpcClient<Config>;