text: from enum import Enum, unique
  
  # DO NOT CHANGE ONCE CODE IS DEPLOYED ON THE LEDGER
  PREFIX = '2000'
  
  
  @unique
  class FeesTransactions(Enum):
      #  These numeric constants CANNOT be changed once they have been used,
      #  because that would break backwards compatibility with the ledger
      # Also the numeric constants CANNOT collide with other transactions hence a
      # prefix is used
      SET_FEES = PREFIX + '0'
      GET_FEES = PREFIX + '1'
      FEES = PREFIX + '2'
      GET_FEE = PREFIX + '3'
  
      def __str__(self):
          return self.name
  