/**
 * PayOS Wallet Onboard JavaScript SDK
 *
 * This SDK provides client-side integration with PayOS Wallet Onboard, allowing
 * Developers to easily embed a secure card linking flow into their applications.
 */
export interface OnCloseData {
    success: boolean;
    walletUserId?: string;
}
export interface PayOSWalletOnboardOptions {
    /**
     * The container element or selector where the iframe will be mounted
     */
    container: string | HTMLElement;
    /**
     * The token generated on the server side to authenticate with PayOS Link
     */
    token: string;
    /**
     * Environment to use - 'sandbox' or 'production'
     */
    environment?: "sandbox" | "production";
    /**
     * The merchant name to display in the UI
     */
    merchantName?: string;
    /**
     * Optional wallet user ID if already known
     */
    walletUserId?: string;
    /**
     * Callback when the iframe is closed
     */
    onClose?: (data: OnCloseData) => void;
    /**
     * Callback when an error occurs
     */
    onError?: (error: Error) => void;
    /**
     * Optional height for the iframe
     */
    height?: string;
    /**
     * Custom URL for the UI (for development or staging environments)
     * This overrides the environment setting
     */
    customBaseUrl?: string;
}
/**
 * Main PayOS Wallet Onboard class
 */
declare class PayOSWalletOnboard {
    private container;
    private iframe;
    private options;
    private messageListener;
    /**
     * Create a new PayOS Wallet Onboard instance
     */
    constructor(options: PayOSWalletOnboardOptions);
    /**
     * Mount the PayOS Wallet Onboard iframe to the container
     */
    mount(): void;
    /**
     * Unmount the PayOS Wallet Onboard iframe
     */
    unmount(): void;
    /**
     * Handle messages from the iframe
     */
    private handleMessage;
    /**
     * Build the URL for the iframe
     */
    private buildIframeUrl;
    /**
     * Get the base URL for the iframe based on environment
     */
    private getBaseUrl;
    /**
     * Get allowed origins for postMessage security
     */
    private getAllowedOrigins;
    /**
     * Validate the options provided
     */
    private validateOptions;
}
export default PayOSWalletOnboard;