From 270ac2e8c113f39a55a14c019e19c578f8b059ab Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Tue, 24 Mar 2020 17:15:47 +0100
Subject: [PATCH] Add check_order_cancelled_empty method to exchange

---
 freqtrade/exchange/exchange.py  |  8 ++++++++
 tests/exchange/test_exchange.py | 12 ++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index f4c94a1ca..073e28659 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -902,6 +902,14 @@ class Exchange:
             self._async_get_trade_history(pair=pair, since=since,
                                           until=until, from_id=from_id))
 
+    def check_order_canceled_empty(self, order: Dict) -> bool:
+        """
+        Verify if an order has been cancelled without being partially filled
+        :param order: Order dict as returned from get_order()
+        :return: True if order has been cancelled without being filled, False otherwise.
+        """
+        return order['status'] in ('closed', 'canceled') and order.get('filled') == 0.0
+
     @retrier
     def cancel_order(self, order_id: str, pair: str) -> None:
         if self._config['dry_run']:
diff --git a/tests/exchange/test_exchange.py b/tests/exchange/test_exchange.py
index 8d8930f66..7f03eb547 100644
--- a/tests/exchange/test_exchange.py
+++ b/tests/exchange/test_exchange.py
@@ -1705,6 +1705,18 @@ def test_cancel_order_dry_run(default_conf, mocker, exchange_name):
     assert exchange.cancel_order(order_id='123', pair='TKN/BTC') is None
 
 
+@pytest.mark.parametrize("exchange_name", EXCHANGES)
+@pytest.mark.parametrize("order,result", [
+    ({'status': 'closed', 'filled': 10}, False),
+    ({'status': 'closed', 'filled': 0.0}, True),
+    ({'status': 'canceled', 'filled': 0.0}, True),
+    ({'status': 'canceled', 'filled': 10.0}, False),
+    ])
+def test_check_order_canceled_empty(mocker, default_conf, exchange_name, order, result):
+    exchange = get_patched_exchange(mocker, default_conf, id=exchange_name)
+    assert exchange.check_order_canceled_empty(order) == result
+
+
 # Ensure that if not dry_run, we should call API
 @pytest.mark.parametrize("exchange_name", EXCHANGES)
 def test_cancel_order(default_conf, mocker, exchange_name):