Added get_liquidation_price check

freqtrade/exchange/exchange.py

@@ -1993,7 +1993,9 @@ class Exchange:
             return
 
         try:
-            return self._api.fetch_positions(pair).liquidationPrice
+            positions = self._api.fetch_positions([pair])
+            position = positions[0]
+            return position['liquidationPrice']
         except ccxt.DDoSProtection as e:
             raise DDosProtection(e) from e
         except (ccxt.NetworkError, ccxt.ExchangeError) as e:

tests/exchange/test_exchange.py

@@ -3583,10 +3583,39 @@ def test_calculate_funding_fees(
 def test_get_liquidation_price(mocker, default_conf):
 
     api_mock = MagicMock()
-    api_mock.fetch_positions = MagicMock()
-    type(api_mock).has = PropertyMock(return_value={'fetchPositions': True})
+    api_mock.fetch_positions = MagicMock(return_value=[{
+        'info': {},
+        'symbol': 'NEAR/USDT:USDT',
+        'timestamp': 1642164737148,
+        'datetime': '2022-01-14T12:52:17.148Z',
+        'initialMargin': 1.51072,
+        'initialMarginPercentage': 0.1,
+        'maintenanceMargin': 0.38916147,
+        'maintenanceMarginPercentage': 0.025,
+        'entryPrice': 18.884,
+        'notional': 15.1072,
+        'leverage': 9.97,
+        'unrealizedPnl': 0.0048,
+        'contracts': 8,
+        'contractSize': 0.1,
+        'marginRatio': None,
+        'liquidationPrice': 17.47,
+        'markPrice': 18.89,
+        'collateral': 1.52549075,
+        'marginType': 'isolated',
+        'side': 'buy',
+        'percentage': 0.003177292946409658
+    }])
+    mocker.patch.multiple(
+        'freqtrade.exchange.Exchange',
+        exchange_has=MagicMock(return_value=True),
+    )
     default_conf['dry_run'] = False
 
+    exchange = get_patched_exchange(mocker, default_conf)
+    liq_price = exchange.get_liquidation_price('NEAR/USDT:USDT')
+    assert liq_price == 17.47
+
     ccxt_exceptionhandlers(
         mocker,
         default_conf,