remove unnecessary argument encoding from bytes.decode() and str.encode()

the encoding parameter defaults to utf-8, so it's not needed

lnbits/core/models.py

@@ -46,8 +46,8 @@ class Wallet(BaseModel):
             return ""
 
     def lnurlauth_key(self, domain: str) -> SigningKey:
-        hashing_key = hashlib.sha256(self.id.encode("utf-8")).digest()
-        linking_key = hmac.digest(hashing_key, domain.encode("utf-8"), "sha256")
+        hashing_key = hashlib.sha256(self.id.encode()).digest()
+        linking_key = hmac.digest(hashing_key, domain.encode(), "sha256")
 
         return SigningKey.from_string(
             linking_key, curve=SECP256k1, hashfunc=hashlib.sha256

lnbits/core/views/api.py

@@ -536,7 +536,7 @@ async def api_lnurlscan(code: str, wallet: WalletTypeInfo = Depends(get_key_type
 
                 params.update(
                     description_hash=hashlib.sha256(
-                        data["metadata"].encode("utf-8")
+                        data["metadata"].encode()
                     ).hexdigest()
                 )
                 metadata = json.loads(data["metadata"])