import { type Message, type ExternalMessage, type MessengerMeta } from "./types.js";
export declare function isMessengerMessage(message: unknown): message is Message;
export declare function isExternalMessengerMessage(message: unknown): message is ExternalMessage;
export declare function registerMethods(methods: Partial<MessengerMethods>): void;
export declare function exposeMethodsToExternalMessaging(...types: Array<keyof MessengerMethods>): void;
/** Ensure/document that the current function was called via Messenger */
export declare function assertMessengerCall(_this: MessengerMeta): asserts _this is MessengerMeta;