code: def GetScriptHashesForVerifying(self):
          
          # if this is the genesis block, we dont have a prev hash!
          if self.PrevHash.Data == bytearray(32):
              #            logger.info("verificiation script %s"  %(self.Script.ToJson()))
              if type(self.Script.VerificationScript) is bytes:
                  return [bytearray(self.Script.VerificationScript)]
              elif type(self.Script.VerificationScript) is bytearray:
                  return [self.Script.VerificationScript]
              else:
                  raise Exception('Invalid Verification script')
  
          prev_header = GetBlockchain().GetHeader(self.PrevHash.ToBytes())
          if prev_header is None:
              raise Exception('Invalid operation')
          return [prev_header.NextConsensus]
docs: Get the script hash used for verification.
  
          Raises:
              Exception: if the verification script is invalid, or no header could be retrieved from the Blockchain.
  
          Returns:
              list: with a single UInt160 representing the next consensus node.