text: from __future__ import annotations
  
  from typing import Any, Dict, Optional
  
  from boa3.model.method import Method
  from boa3.model.property import Property
  from boa3.model.type.classes.classarraytype import ClassArrayType
  from boa3.model.variable import Variable
  
  
  class CryptoLibClass(ClassArrayType):
      """
      A class used to represent CryptoLib native contract
      """
  
      def __init__(self):
          super().__init__('CryptoLib')
  
          self._variables: Dict[str, Variable] = {}
          self._class_methods: Dict[str, Method] = {}
          self._constructor: Optional[Method] = None
  
      @property
      def instance_variables(self) -> Dict[str, Variable]:
          return self._variables.copy()
  
      @property
      def class_variables(self) -> Dict[str, Variable]:
          return {}
  
      @property
      def properties(self) -> Dict[str, Property]:
          return {}
  
      @property
      def static_methods(self) -> Dict[str, Method]:
          return {}
  
      @property
      def class_methods(self) -> Dict[str, Method]:
          # avoid recursive import
          from boa3.model.builtin.interop.crypto import (Sha256Method, Ripemd160Method,
                                                         VerifyWithECDsaMethod)
  
          if len(self._class_methods) == 0:
              self._class_methods = {
                  'sha256': Sha256Method(),
                  'ripemd160': Ripemd160Method(),
                  'verify_with_ecdsa': VerifyWithECDsaMethod(),
              }
          return self._class_methods
  
      @property
      def instance_methods(self) -> Dict[str, Method]:
          return {}
  
      def constructor_method(self) -> Optional[Method]:
          return self._constructor
  
      @classmethod
      def build(cls, value: Any = None) -> CryptoLibClass:
          if value is None or cls._is_type_of(value):
              return _CryptoLib
  
      @classmethod
      def _is_type_of(cls, value: Any):
          return isinstance(value, CryptoLibClass)
  
  
  _CryptoLib = CryptoLibClass()
  