From f38accb77b05accfbf328e62c5b417ed7613d527 Mon Sep 17 00:00:00 2001
From: Matthias <xmatthias@outlook.com>
Date: Wed, 26 Feb 2020 07:09:54 +0100
Subject: [PATCH] Return empty string if no quote / base currency can be found

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

diff --git a/freqtrade/exchange/exchange.py b/freqtrade/exchange/exchange.py
index cc0ecc6cd..21627679f 100644
--- a/freqtrade/exchange/exchange.py
+++ b/freqtrade/exchange/exchange.py
@@ -232,13 +232,13 @@ class Exchange:
         """
         Return a pair's quote currency
         """
-        return self.markets.get(pair, {}).get('quote')
+        return self.markets.get(pair, {}).get('quote', '')
 
     def get_pair_base_currency(self, pair: str) -> str:
         """
         Return a pair's quote currency
         """
-        return self.markets.get(pair, {}).get('base')
+        return self.markets.get(pair, {}).get('base', '')
 
     def klines(self, pair_interval: Tuple[str, str], copy: bool = True) -> DataFrame:
         if pair_interval in self._klines:
diff --git a/tests/exchange/test_exchange.py b/tests/exchange/test_exchange.py
index ca2bedb01..3a653edb6 100644
--- a/tests/exchange/test_exchange.py
+++ b/tests/exchange/test_exchange.py
@@ -408,6 +408,7 @@ def test_get_quote_currencies(default_conf, mocker):
     ('LTC/USD', 'USD'),
     ('ETH/USDT', 'USDT'),
     ('XLTCUSDT', 'USDT'),
+    ('XRP/NOCURRENCY', ''),
 ])
 def test_get_pair_quote_currency(default_conf, mocker, pair, expected):
     ex = get_patched_exchange(mocker, default_conf)
@@ -419,6 +420,7 @@ def test_get_pair_quote_currency(default_conf, mocker, pair, expected):
     ('LTC/USD', 'LTC'),
     ('ETH/USDT', 'ETH'),
     ('XLTCUSDT', 'LTC'),
+    ('XRP/NOCURRENCY', ''),
 ])
 def test_get_pair_base_currency(default_conf, mocker, pair, expected):
     ex = get_patched_exchange(mocker, default_conf)