code: def _process(self, startblock):
          
          log.debug("Processing blocks %d to %d" % (startblock, startblock + BATCH_SIZE))
  
          addresses = []
  
          for blockNum in range(startblock, startblock + BATCH_SIZE):
              block_hash = self.db.reader._get_block_hash(blockNum)
              if block_hash is not None:
                  receipts = self.db.reader._get_block_receipts(block_hash, blockNum)
  
                  for receipt in receipts:
                      if receipt.contractAddress is not None and not all(
                          b == 0 for b in receipt.contractAddress
                      ):
                          addresses.append(receipt.contractAddress)
              else:
                  if len(addresses) == 0:
                      raise Exception()
  
          return addresses
docs: Processesing method.