From cc7d341afc09a453f0d07f716e6bfb334e52541a Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Tue, 19 Mar 2024 18:19:22 +0100
Subject: [PATCH] Add overrides for Exchange Support

---
 freqtrade/exchange/exchange.py  | 4 ++++
 tests/exchange/test_exchange.py | 3 +++
 2 files changed, 7 insertions(+)

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index 84b4212bd..2bf92c389 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -88,6 +88,8 @@ class Exchange:
         "order_props_in_contracts": ['amount', 'filled', 'remaining'],
         # Override createMarketBuyOrderRequiresPrice where ccxt has it wrong
         "marketOrderRequiresPrice": False,
+        "exchange_has_overrides": {},  # Dictionary overriding ccxt's "has".
+        # Expected to be in the format {"fetchOHLCV": True} or {"fetchOHLCV": False}
     }
     _ft_has: Dict = {}
     _ft_has_futures: Dict = {}
@@ -717,6 +719,8 @@ class Exchange:
         :param endpoint: Name of endpoint (e.g. 'fetchOHLCV', 'fetchTickers')
         :return: bool
         """
+        if endpoint in self._ft_has.get('exchange_has_overrides', {}):
+            return self._ft_has['exchange_has_overrides'][endpoint]
         return endpoint in self._api.has and self._api.has[endpoint]
 
     def get_precision_amount(self, pair: str) -> Optional[float]:
diff --git a/tests/exchange/test_exchange.py b/tests/exchange/test_exchange.py
index 34d4ca4c6..104730d8c 100644
--- a/tests/exchange/test_exchange.py
+++ b/tests/exchange/test_exchange.py
@@ -1066,6 +1066,9 @@ def test_exchange_has(default_conf, mocker):
     exchange = get_patched_exchange(mocker, default_conf, api_mock)
     assert not exchange.exchange_has("deadbeef")
 
+    exchange._ft_has['exchange_has_overrides'] = {'deadbeef': True}
+    assert exchange.exchange_has("deadbeef")
+
 
 @pytest.mark.parametrize("side,leverage", [
     ("buy", 1),