From 142e5786dd969c539cfa9405e7086428e0483adc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?dni=20=E2=9A=A1?= <office@dnilabs.com>
Date: Sun, 26 Nov 2023 16:09:11 +0100
Subject: [PATCH] formatting

---
 boltz_client/onchain.py       | 1 -
 boltz_client/onchain_wally.py | 4 ++--
 2 files changed, 2 insertions(+), 3 deletions(-)

diff --git a/boltz_client/onchain.py b/boltz_client/onchain.py
index be163d1..be6dabd 100644
--- a/boltz_client/onchain.py
+++ b/boltz_client/onchain.py
@@ -9,7 +9,6 @@
 from embit.liquid.networks import NETWORKS as LNETWORKS
 from embit.liquid.transaction import LTransaction
 from embit.networks import NETWORKS
-
 from embit.transaction import SIGHASH, Transaction, TransactionInput, TransactionOutput
 
 from .mempool import LockupData
diff --git a/boltz_client/onchain_wally.py b/boltz_client/onchain_wally.py
index 86da4c3..b95fb51 100644
--- a/boltz_client/onchain_wally.py
+++ b/boltz_client/onchain_wally.py
@@ -66,8 +66,8 @@ def create_liquid_tx(
     assert blinding_key, "blinding_key is required"
     try:
         blinding_key_bytes = bytes.fromhex(blinding_key)
-    except ValueError:
-        raise ValueError("blinding_key must be hex encoded")
+    except ValueError as exc:
+        raise ValueError("blinding_key must be hex encoded") from exc
 
     receive_blinding_pubkey = wally.confidential_addr_segwit_to_ec_public_key(
         receive_address, confidential_addr_family