use bytes.fromhex/hex builtins instead of binascii.hexlify/unhexlify

lnbits/wallets/lndgrpc.py

@@ -8,7 +8,6 @@ except ImportError:  # pragma: nocover
 
 import asyncio
 import base64
-import binascii
 import hashlib
 from os import environ, error
 from typing import AsyncGenerator, Dict, Optional
@@ -229,8 +228,8 @@ class LndWallet(Wallet):
         try:
             r_hash = hex_to_bytes(checking_id)
             if len(r_hash) != 32:
-                raise binascii.Error
-        except binascii.Error:
+                raise ValueError
+        except ValueError:
             # this may happen if we switch between backend wallets
             # that use different checking_id formats
             return PaymentStatus(None)
@@ -250,8 +249,8 @@ class LndWallet(Wallet):
         try:
             r_hash = hex_to_bytes(checking_id)
             if len(r_hash) != 32:
-                raise binascii.Error
-        except binascii.Error:
+                raise ValueError
+        except ValueError:
             # this may happen if we switch between backend wallets
             # that use different checking_id formats
             return PaymentStatus(None)