code: def tx_parse(raw_tx, blockchain='bitcoin', **blockchain_opts):
      
      if blockchain == 'bitcoin':
          return btc_tx_deserialize(raw_tx, **blockchain_opts)
      else:
          raise ValueError("Unknown blockchain {}".format(blockchain))
docs: Parse a raw transaction, based on the type of blockchain it's from
      Returns a tx dict on success (see get_virtual_transactions)
      Raise ValueError for unknown blockchain
      Raise some other exception for invalid raw_tx (implementation-specific)