/**
 * Postis options configuration.
 */
export interface PostisOptions {
    scope: string;
    window: Window;
    windowForEventListening?: Window;
    allowedOrigin?: string;
}
/**
 * Parameters for sending a message.
 */
export interface SendOptions {
    method: string;
    params?: any;
}
/**
 * Creates a postMessage-based communication channel between windows.
 */
export default class Postis {
    private scope;
    private targetWindow;
    private windowForEventListening;
    private allowedOrigin?;
    private listeners;
    private sendBuffer;
    private listenBuffer;
    private _ready;
    private readyMethod;
    private readynessCheck;
    private readyCheckID;
    private listener;
    /**
     * Creates a new Postis instance.
     *
     * @param {PostisOptions} options - Configuration options for the postis instance.
     */
    constructor(options: PostisOptions);
    /**
     * Handles incoming postMessage events.
     *
     * @param {MessageEvent} event - The message event from postMessage.
     * @returns {void}
     */
    private handleMessage;
    /**
     * Registers a listener for a specific method.
     *
     * @param {string} method - The method name to listen for.
     * @param {Function} callback - The callback function to invoke when the method is received.
     * @returns {void}
     */
    listen(method: string, callback: (params: any) => void): void;
    /**
     * Sends a message to the target window.
     *
     * @param {SendOptions} opts - The message options containing method and params.
     * @returns {void}
     */
    send(opts: SendOptions): void;
    /**
     * Executes the callback when the connection is ready.
     *
     * @param {Function} callback - The callback to execute when ready.
     * @returns {void}
     */
    ready(callback: () => void): void;
    /**
     * Destroys the postis instance and cleans up resources.
     *
     * @param {Function} [callback] - Optional callback to execute after cleanup.
     * @returns {void}
     */
    destroy(callback?: () => void): void;
}