/**
 * Stripe Promotion Code Module
 *
 * Provides promotion code validation functionality for the Stripe billing system.
 * Validates promotion codes against Stripe API and returns discount details.
 *
 * Features:
 * - Validate promotion codes before checkout
 * - Check coupon validity, redemption limits, expiration
 * - Check product restrictions
 * - Check first-time customer restrictions
 * - Return discount details (percentage/amount, duration)
 */
export declare class StripePromotionCodeModule {
}
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