export type PaymentMethod = 'qr' | 'card' | 'sbp' | 'yandex-pay';
export type PaymentStatus = 'created' | 'pending' | 'authorized' | 'paid' | 'failed' | 'cancelled' | 'expired';
/** Central payment API resolves amount/currency/routing from this server checkout id. */
export interface PaymentRequest { checkoutSessionId: string; returnUrl?: string; metadata?: Readonly<Record<string, string>>; }
export interface PaymentAttempt {
  paymentId: string;
  method: PaymentMethod;
  status: PaymentStatus;
  action?: { type: 'redirect' | 'qr'; url: string };
  failureMessage?: string;
}
export interface PaymentResult extends PaymentAttempt { status: 'paid' | 'authorized'; }
export interface PaymentFailure {
  method: PaymentMethod;
  code: 'configuration' | 'backend' | 'declined' | 'expired' | 'popup_blocked';
  message: string;
  cause?: unknown;
}