text: class UnknownSourceType(Exception):
      pass
  
  
  class InvalidSourceHashLength(Exception):
      pass
  
  
  class DecodeError(Exception):
      pass
  
  
  class URIParseError(Exception):
      pass
  
  
  class CertificateError(Exception):
      pass
  
  
  class InvalidAddress(Exception):
      pass
  