/**
 * Core checkout functionality
 */
import { CheckoutConfig, OpenCheckoutOptions } from "./types";
/**
 * Initialize the checkout SDK with configuration
 */
export declare function initializeCheckout(config: CheckoutConfig): void;
/**
 * Open checkout iframe with specified options
 */
export declare function openCheckout(options: OpenCheckoutOptions): void;
/**
 * Check if checkout is currently open
 */
export declare function isCheckoutOpen(): boolean;
/**
 * Get the SDK version
 */
export declare function getSDKVersion(): string;