import type { ChatStore } from './store.js';
import type { ConversationId } from './protocol/index.js';
import type { Renderer } from './renderer.js';
/** Resolve a single user-supplied relay URL into the concrete WebSocket URL and
 *  HTTP(S) base the client needs.
 *
 *  Accepts any scheme — `https://`, `http://`, `wss://`, or `ws://` — and any of
 *  these shapes: bare origin (`https://api.example.com`), origin with `/ws`
 *  (`wss://api.example.com/ws`), or a sub-path (`https://api.example.com/relay`).
 *
 *    https://api.example.com      → ws  wss://api.example.com/ws   · http https://api.example.com
 *    wss://api.example.com/ws     → ws  wss://api.example.com/ws   · http https://api.example.com
 *    http://localhost:3000        → ws  ws://localhost:3000/ws     · http http://localhost:3000
 *
 *  `https`/`wss` map to a secure socket (`wss`); `http`/`ws` map to `ws`. A bare
 *  host with no scheme is assumed secure. Pass `apiBaseOverride` only when the
 *  REST API lives on a different origin than the socket. */
export declare function resolveRelayUrls(input: string, apiBaseOverride?: string): {
    wsUrl: string;
    httpBase: string;
};
/** Derive the HTTP(S) base origin from a ws(s):// URL.
 *  @deprecated prefer {@link resolveRelayUrls}; kept for back-compat. */
export declare function httpBaseFromWsUrl(wsUrl: string): string;
/** Initial history restore on conversation open.
 *
 *  Fetches the latest PAGE messages and sets up scroll-triggered loading for
 *  older messages: a `scroll` listener on the container's own scrollTop (see
 *  below), not an IntersectionObserver sentinel. No buttons — scrolling up
 *  loads more automatically.
 *
 *  Does NOT return a cleanup function — the scroll-listener teardown is
 *  registered internally via `renderer.setScrollCleanup()` and runs whenever
 *  the renderer tears down the conversation view. Callers just `void` this
 *  call (see index.ts). */
export declare function restoreHistory(wsUrl: string, token: string, conversationId: ConversationId, store: ChatStore, renderer: Renderer, apiBase?: string): Promise<void>;