fix(currency): type hinting errors

canary/cogs/currency.py

@@ -131,7 +131,7 @@ def format_symbol_currency(self, amount: Decimal) -> str:
         return self.symbol + self.format_currency(amount)
 
     @staticmethod
-    def check_bet(balance: Decimal, bet: Decimal) -> str | None:
+    def check_bet(balance: Decimal, bet: Decimal | None) -> str | None:
         """
         Checks universally invalid betting cases.
         """
@@ -153,6 +153,8 @@ def check_bet(balance: Decimal, bet: Decimal) -> str | None:
         if bet > balance:
             return "You're too broke to bet that much!"
 
+        return None
+
     async def get_last_claim_time(self, db: aiosqlite.Connection, author: discord.Member | discord.User) -> int | None:
         claim_time_t = await self.fetch_one(
             "SELECT IFNULL(MAX(Date), 0) FROM BankTransactions WHERE UserID = ? AND Action = ?",