def METHOD_NAME(self):
    escrow_address = create_escrow(self.w3)
    with patch("src.chain.escrow.get_web3") as mock_function:
        mock_function.return_value = self.w3
        with self.assertRaises(EscrowClientError) as error:
            store_results(self.w3.eth.chain_id, escrow_address, DEFAULT_URL, "")
    self.assertEqual(f"Invalid empty hash", str(error.exception))