pan - Primary Account Number (16 digits)cvv - Card Verification Value (3 digits)expiry - Expiry date in MM/YY formatpin - PIN digits (4 digits, optional - present when available, null when not set)400 INVALID_OTP_FORMAT - OTP format is invalid (must be 4-8 digits)400 OTP_EXPIRED - OTP has expired. Please initiate a new operation.400 OTP_MAX_ATTEMPTS_REACHED - Maximum OTP verification attempts reached. Please initiate a new operation.400 OTP_VERIFICATION_FAILED - OTP verification failed (generic error)400 OTP_INVALID - Invalid OTP provided. Please try again.404 CARD_NOT_FOUND - The card is invalid. Please use a valid card.404 OTP_OPERATION_NOT_FOUND - The operation ID is invalid. Please use a valid operation.412 INVALID_CARD_STATUS - The card is not ACTIVE. Only ACTIVE cards can access sensitive data.412 OTP_OPERATION_WRONG_STATUS - OTP operation is not in correct state (already completed or failed)503 SERVICE_UNAVAILABLE - The service is currently unavailable. Please try again later.