From 44f4fdf04309cbd4175c53fa46e37cb291f14ee7 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Tue, 25 May 2021 06:33:07 -0400
Subject: [PATCH] Type annot the internal symbol cache

---
 piker/brokers/kraken.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/piker/brokers/kraken.py b/piker/brokers/kraken.py
index 62fc6115..f2adccf4 100644
--- a/piker/brokers/kraken.py
+++ b/piker/brokers/kraken.py
@@ -153,7 +153,7 @@ class Client:
             'User-Agent':
                 'krakenex/2.1.0 (+https://github.com/veox/python3-krakenex)'
         })
-        self._pairs = None
+        self._pairs: list[str] = []
 
     @property
     def pairs(self) -> Dict[str, Any]:
@@ -289,7 +289,7 @@ class Client:
 async def get_client() -> Client:
     client = Client()
 
-    # load all symbols locally for fast search
+    # at startup, load all symbols locally for fast search
     await client.cache_symbols()
 
     yield client