/**
 * Default time to wait for the app to respond to a request-response
 * message before giving up and reclaiming the channel.
 */
export declare const MESSAGE_RESPONSE_TIMEOUT = 30000;
/**
 * Single implementation of origin resolution for the embedded app.
 * Returns the origin (scheme://host[:port]) for a ThoughtSpot host URL,
 * or null when it cannot be parsed.
 * @param thoughtSpotHost
 */
export declare const resolveMessageOrigin: (thoughtSpotHost: string) => string | null;
/**
 * Validates that an inbound window message came from the embedded
 * ThoughtSpot app: the source window must be the embed iframe's window and,
 * when the expected origin is resolvable, the message origin must match it.
 *
 * Fails open (returns true) on the origin check when the expected origin
 * cannot be resolved, to avoid breaking unconventional-but-working setups;
 * a warning is logged on mismatch either way.
 * @param event The message event received on window.
 * @param iFrame The embed iframe the message should originate from.
 * @param thoughtSpotHost The configured ThoughtSpot host.
 */
export declare const isMessageFromIframe: (event: MessageEvent, iFrame: HTMLIFrameElement, thoughtSpotHost: string) => boolean;
/**
 * Posts a one-way message to the embedded app's iframe, optionally
 * transferring a MessageChannel port for the response.
 * @param iFrame
 * @param message
 * @param thoughtSpotHost Used as the postMessage targetOrigin.
 * @param channel
 */
export declare const postMessageToIframe: (iFrame: HTMLIFrameElement, message: {
    type: string;
    data: any;
    context?: any;
}, thoughtSpotHost: string, channel?: MessageChannel) => void;
/**
 * Sends a request-response message to the embedded app over a dedicated
 * MessageChannel. Resolves with the response payload; rejects when the app
 * responds with an error; resolves with a timeout Error object when no
 * response arrives in time (historical behavior, preserved for backward
 * compatibility).
 * @param iFrame
 * @param message
 * @param thoughtSpotHost
 * @param timeoutMs
 */
export declare function sendMessageWithResponse(iFrame: HTMLIFrameElement, message: {
    type: string;
    data: any;
    context?: any;
}, thoughtSpotHost: string, timeoutMs?: number): Promise<any>;
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