From 32107d0ac3b97a9bd2d398b51c26136e7c9050e3 Mon Sep 17 00:00:00 2001
From: jaredgoldman <jaredgoldmandev@gmail.com>
Date: Mon, 20 Mar 2023 21:24:23 -0400
Subject: [PATCH] Strengthen retry case and add comments

---
 piker/brokers/kucoin.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/piker/brokers/kucoin.py b/piker/brokers/kucoin.py
index 65f47a40..ee7c04f7 100644
--- a/piker/brokers/kucoin.py
+++ b/piker/brokers/kucoin.py
@@ -343,6 +343,7 @@ class Client:
 
         url = f"/market/candles?type={type}&symbol={kucoin_sym}&startAt={start_dt}&endAt={end_dt}"
         bars = []
+
         for i in range(10):
 
             res = await self._request(
@@ -350,7 +351,9 @@ class Client:
                 url,
                 api_v="v1",
             )
-            if not isinstance(res, list):
+
+            if not isinstance(res, list) or not len(bars):
+                # Do a gradual backoff if Kucoin is rate limiting us
                 await trio.sleep(i + (randint(0, 1000) / 1000))
             else:
                 bars = res