chore: code format

helpers.py

@@ -2,18 +2,18 @@ from bech32 import bech32_decode, convertbits
 
 
 def normalize_public_key(pubkey: str) -> str:
-    if pubkey.startswith('npub1'):
+    if pubkey.startswith("npub1"):
         _, decoded_data = bech32_decode(pubkey)
         if not decoded_data:
             raise ValueError("Public Key is not valid npub")
 
         decoded_data_bits = convertbits(decoded_data, 5, 8, False)
-        if not  decoded_data_bits:
+        if not decoded_data_bits:
             raise ValueError("Public Key is not valid npub")
         return bytes(decoded_data_bits).hex()
-    
-    #check if valid hex
+
+    # check if valid hex
     if len(pubkey) != 64:
         raise ValueError("Public Key is not valid hex")
     int(pubkey, 16)
-    return pubkey
+    return pubkey