From c2914feb123dd71fb15154bc8ffa96c6a562e6cb Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Mon, 17 Oct 2022 09:54:58 +0000
Subject: [PATCH] Don't fail contract size repopulation if pair is no longer
 available

---
 freqtrade/exchange/exchange.py  | 6 ++++--
 tests/exchange/test_exchange.py | 5 +++--
 2 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index 53a3960b1..2054d44e9 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -412,9 +412,11 @@ class Exchange:
 
     def get_contract_size(self, pair: str) -> float:
         if self.trading_mode == TradingMode.FUTURES:
-            market = self.markets[pair]
+            market = self.markets.get(pair, {})
             contract_size: float = 1.0
-            if market['contractSize'] is not None:
+            if not market:
+                return None
+            if market.get('contractSize') is not None:
                 # ccxt has contractSize in markets as string
                 contract_size = float(market['contractSize'])
             return contract_size
diff --git a/tests/exchange/test_exchange.py b/tests/exchange/test_exchange.py
index 07aad80ff..a48cb05e0 100644
--- a/tests/exchange/test_exchange.py
+++ b/tests/exchange/test_exchange.py
@@ -4341,9 +4341,10 @@ def test__fetch_and_calculate_funding_fees_datetime_called(
     ('XLTCUSDT', 1, 'spot'),
     ('LTC/USD', 1, 'futures'),
     ('XLTCUSDT', 0.01, 'futures'),
-    ('ETH/USDT:USDT', 10, 'futures')
+    ('ETH/USDT:USDT', 10, 'futures'),
+    ('TORN/USDT:USDT', None, 'futures'),  # Don't fail for unavailable pairs.
 ])
-def est__get_contract_size(mocker, default_conf, pair, expected_size, trading_mode):
+def test__get_contract_size(mocker, default_conf, pair, expected_size, trading_mode):
     api_mock = MagicMock()
     default_conf['trading_mode'] = trading_mode
     default_conf['margin_mode'] = 'isolated'