import { Stream } from './models/stream';
import { JSONValue, RequestHandler, WappRequestHandler } from './util/types';
declare const openStream: Stream;
declare let startBackgroundTimer: ReturnType<typeof setTimeout> | undefined;
export declare function streamHelperReset(): void;
/**
 * Sends a message to the foreground.
 *
 * @param msg - The message to be sent.
 * @return A promise that resolves with the response from the foreground.
 */
export declare function sendToForeground<T = JSONValue, R = JSONValue>(msg: T): Promise<R>;
/**
 * Sends a message to the background.
 *
 * @param msg - The message to be sent.
 * @return A promise that resolves with the response from the background.
 */
export declare function sendToBackground<T = JSONValue, R = JSONValue>(msg: T): Promise<R>;
/**
 * Signals the foreground with a message.
 *
 * @param msg - The message to be sent.
 * @return A promise that resolves when the signal is sent.
 */
export declare function signalForeground<T = JSONValue>(msg: T): Promise<void>;
/**
 * Sends a signal to the background with a message.
 *
 * @param msg - The message to be sent.
 * @return A promise that resolves when the signal is sent.
 */
export declare function signalBackground<T = JSONValue>(msg: T): Promise<void>;
/**
 * Register a callback function that handles requests from the foreground.
 *
 * @param callback - The callback function for handling the request.
 * @return A Promise that resolves to true if the request was handled successfully, and false otherwise.
 */
export declare function fromForeground<T = unknown>(callback: WappRequestHandler<T>): Promise<boolean>;
/**
 * Register a callback function that handles requests from the background.
 *
 * @param callback - The callback function for handling the request.
 * @return A Promise that resolves to true if the request was handled successfully, and false otherwise.
 */
export declare function fromBackground<T = unknown>(callback: WappRequestHandler<T>): Promise<boolean>;
/**
 * Register a callback function that handles requests from the web hook.
 *
 * @param handler - The request handler function.
 * @return A promise that resolves to a boolean value indicating the success of the operation.
 */
export declare function onWebHook(handler: RequestHandler): Promise<boolean>;
/**
 * Removed the callback function that handles requests from the web hook.
 *
 * @param handler - The handler for the request.
 * @return A Promise that resolves to true if the request was cancelled successfully, and false otherwise.
 */
export declare function cancelOnWebHook(handler: RequestHandler): Promise<boolean>;
/**
 * Removes the callback function that handles requests from the background.
 *
 * @return A Promise that resolves to true if the request was successfully cancelled, and false otherwise.
 */
export declare function cancelFromBackground(): Promise<boolean>;
/**
 * Removes the callback function that handles requests from the foreground.
 *
 * @return A promise that resolves to true if the request was cancelled successfully, and false otherwise.
 */
export declare function cancelFromForeground(): Promise<boolean>;
/**
 * Waits for the background to start within a given timeout period.
 *
 * @param timeout The maximum time to wait for the background to start, in seconds.
 * @return A promise that resolves to true if the background has started within the timeout period, and false otherwise.
 */
export declare function waitForBackground(timeout?: number): Promise<boolean>;
/**
 * Sets a callback function to be called when a permission update occurs.
 *
 * @param callback - The callback function to be called when a permission update occurs.
 */
export declare function onPermissionUpdate(callback: () => void): void;
/**
 * Cancels the permission update callback.
 */
export declare function cancelPermissionUpdate(): void;
export { openStream, startBackgroundTimer };