text: #import <Foundation/Foundation.h>
  
  /*!
   @brief An error domain for 3D Secure errors
  
   @see BTThreeDSecure
  */
  extern NSString * const BTThreeDSecureErrorDomain;
  extern NSString * const BTThreeDSecureInfoKey;
  extern NSString * const BTThreeDSecureValidationErrorsKey;
  
  /*!
   @brief Error codes that describe errors that occur during 3D Secure
  */
  typedef NS_ENUM(NSInteger, BTThreeDSecureErrorType){
  
      BTThreeDSecureErrorTypeUnknown = 0,
      
      /// 3D Secure failed during the backend card lookup phase; please retry
      BTThreeDSecureErrorTypeFailedLookup,
      
      /// 3D Secure failed during the user-facing authentication phase; please retry
      BTThreeDSecureErrorTypeFailedAuthentication,
      
      /// Braintree SDK is integrated incorrectly
      BTThreeDSecureErrorTypeIntegration,
  };
  