From 0de2f863bd9d51ca38a5a39be88fa011a8380787 Mon Sep 17 00:00:00 2001
From: Tyler Goodlet <jgbt@protonmail.com>
Date: Sat, 10 Dec 2022 15:21:20 -0500
Subject: [PATCH] `kraken`: Explicitly report missing `Pair` fields in error

---
 piker/brokers/kraken/feed.py | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/piker/brokers/kraken/feed.py b/piker/brokers/kraken/feed.py
index b9ef0789..7b3cf967 100644
--- a/piker/brokers/kraken/feed.py
+++ b/piker/brokers/kraken/feed.py
@@ -352,7 +352,13 @@ async def stream_quotes(
             # transform to upper since piker style is always lower
             sym = sym.upper()
             sym_info = await client.symbol_info(sym)
-            si = Pair(**sym_info)  # validation
+            try:
+                si = Pair(**sym_info)  # validation
+            except TypeError:
+                fields_diff = set(sym_info) - set(Pair.__struct_fields__)
+                raise TypeError(
+                    f'Missing msg fields {fields_diff}'
+                )
             syminfo = si.to_dict()
             syminfo['price_tick_size'] = 1 / 10**si.pair_decimals
             syminfo['lot_tick_size'] = 1 / 10**si.lot_decimals