export interface EmbeddedAppMessageEvent<TPayload = unknown> {
    name: string;
    payload: TPayload;
    event: MessageEvent;
}
export type EmbeddedAppMessageHandler = (message: EmbeddedAppMessageEvent) => void;
export type EmbeddedAppRequestHandler = (message: EmbeddedAppMessageEvent) => unknown | Promise<unknown>;
export interface EmbeddedAppBridgeOptions {
    /**
     * Exact parent origin to post back to. Defaults to document.referrer's
     * origin when available. If no origin can be resolved, sends fail closed.
     */
    parentOrigin?: string;
    /**
     * Origins allowed to send messages to the embedded app. Defaults to the
     * resolved parent origin.
     */
    allowedOrigins?: string[];
    onMessage?: EmbeddedAppMessageHandler;
    onRequest?: EmbeddedAppRequestHandler;
    targetWindow?: Window | null;
    currentWindow?: Window;
}
export interface EmbeddedAppBridge {
    parentOrigin: string | null;
    postMessage<TPayload = unknown>(name: string, payload?: TPayload): boolean;
    request<TResult = unknown, TPayload = unknown>(name: string, payload?: TPayload, options?: {
        timeoutMs?: number;
    }): Promise<TResult>;
    ready<TPayload = unknown>(payload?: TPayload): boolean;
    close<TPayload = unknown>(payload?: TPayload): boolean;
    destroy(): void;
}
export declare function createEmbeddedAppBridge(options?: EmbeddedAppBridgeOptions): EmbeddedAppBridge;
export declare function sendEmbeddedAppMessage<TPayload = unknown>(name: string, payload?: TPayload, options?: Pick<EmbeddedAppBridgeOptions, "currentWindow" | "parentOrigin" | "targetWindow">): boolean;
export declare function announceEmbeddedAppReady<TPayload = unknown>(payload?: TPayload, options?: Pick<EmbeddedAppBridgeOptions, "currentWindow" | "parentOrigin" | "targetWindow">): boolean;
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