code: def get(self, tx_id):
          
          pool = current_app.config['bigchain_pool']
  
          with pool() as bigchain:
              tx = bigchain.get_transaction(tx_id)
  
          if not tx:
              return make_error(404)
  
          return tx.to_dict()
docs: API endpoint to get details about a transaction.
  
          Args:
              tx_id (str): the id of the transaction.
  
          Return:
              A JSON string containing the data about the transaction.