/**
 * Validation functions for checkout parameters
 */
import { CheckoutConfig } from './types';
/**
 * Validates checkout configuration
 */
export declare function validateConfig(config: CheckoutConfig): void;
/**
 * Validates redirect URL format and length
 */
export declare function validateRedirectUrl(url: string): void;
/**
 * Validates payment URL format and length
 */
export declare function validatePaymentLink(url: string): void;
/**
 * Validates product ID format and length
 */
export declare function validateProductId(id: string): void;
/**
 * Validates payment link ID format and length
 */
export declare function validatePaymentLinkId(id: string): void;