code: def get_current_block_hash(self, is_full: bool = False) -> str:
          
          payload = self.generate_json_rpc_payload(RpcMethod.GET_CURRENT_BLOCK_HASH)
          response = self.__post(self.__url, payload)
          if is_full:
              return response
          return response['result']
docs: This interface is used to get the hexadecimal hash value of the highest block in current network.
  
          Return:
              the hexadecimal hash value of the highest block in current network.