diff --git a/app/external/cashu/core/bolt11.py b/app/external/cashu/core/bolt11.py
index 890ea7e..b1fecc2 100644
--- a/app/external/cashu/core/bolt11.py
+++ b/app/external/cashu/core/bolt11.py
@@ -184,7 +184,6 @@ def lnencode(addr, privkey):
     tags_set = set()
 
     for k, v in addr.tags:
-
         # BOLT #11:
         #
         # A writer MUST NOT include more than one `d`, `h`, `n` or `x` fields,
diff --git a/app/external/cashu/core/split.py b/app/external/cashu/core/split.py
index 44b9cf5..b523299 100644
--- a/app/external/cashu/core/split.py
+++ b/app/external/cashu/core/split.py
@@ -2,7 +2,7 @@ def amount_split(amount):
     """Given an amount returns a list of amounts returned e.g. 13 is [1, 4, 8]."""
     bits_amt = bin(amount)[::-1][:-2]
     rv = []
-    for (pos, bit) in enumerate(bits_amt):
+    for pos, bit in enumerate(bits_amt):
         if bit == "1":
             rv.append(2**pos)
     return rv
diff --git a/app/external/cashu/lightning/lnbits.py b/app/external/cashu/lightning/lnbits.py
index 5ccd0ea..da23b5f 100644
--- a/app/external/cashu/lightning/lnbits.py
+++ b/app/external/cashu/lightning/lnbits.py
@@ -105,7 +105,6 @@ class LNbitsWallet(Wallet):
 
     async def get_invoice_status(self, checking_id: str) -> PaymentStatus:
         try:
-
             r = self.s.get(
                 url=f"{self.endpoint}/api/v1/payments/{checking_id}",
                 headers=self.key,
diff --git a/app/external/cashu/wallet/crud.py b/app/external/cashu/wallet/crud.py
index bb72648..bb85e22 100644
--- a/app/external/cashu/wallet/crud.py
+++ b/app/external/cashu/wallet/crud.py
@@ -138,7 +138,6 @@ async def store_p2sh(db: Database, p2sh: P2SHScript):
 
 
 async def get_unused_locks(db: Database, address: str = None):
-
     clause: List[str] = []
     values: dict[str, Any] = {}