import { type AppState } from './config';
/**
 * Sends a message to one instance's iframe only. Every internal caller uses this, so two
 * instances on the same page can never receive each other's messages.
 */
export declare const postMessageToInstance: (instance: AppState, message: Record<string, unknown>) => boolean;
/**
 * Kept for callers outside the SDK, which have no instance to name. Resolves to instance
 * #1. Nothing inside the SDK uses it, so an ambiguous answer cannot corrupt routing.
 */
export declare const getAngieIframe: () => HTMLIFrameElement | null;
export declare const getAngieIframeOrigin: () => string | null;
export declare const postMessageToAngieIframe: (message: Record<string, unknown>, targetOrigin?: string) => boolean;