From 8657e99c269e45198480dec46f39d0c5c596482e Mon Sep 17 00:00:00 2001
From: Sam Germain <sam.germain@usask.ca>
Date: Fri, 11 Feb 2022 06:38:57 -0600
Subject: [PATCH] trimmed down get_maintenance_ratio_and_amt, now requires
 fetchLeverageTiers

---
 freqtrade/exchange/exchange.py | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index 86da18017..650df12d0 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -2295,16 +2295,7 @@ class Exchange:
             # The lowest notional_floor for any pair in fetch_leverage_tiers is always 0 because it
             # describes the min amt for a tier, and the lowest tier will always go down to 0
         else:
-            if pair not in self.markets:
-                raise InvalidOrderException(
-                    f"{pair} is not tradeable on {self.name} {self.trading_mode.value}"
-                )
-            mmr = self.markets[pair]['maintenanceMarginRate']
-            if mmr is None:
-                raise InvalidOrderException(
-                    f"Maintenance margin rate for {pair} is unavailable for {self.name}"
-                )
-            return (mmr, None)
+            raise OperationalException(f"Cannot get maintenance ratio using {self.name}")
 
 
 def is_exchange_known_ccxt(exchange_name: str, ccxt_module: CcxtModuleType = None) -> bool: