feat: remove FEE_RESERVE

lnbits/settings.py

@@ -1,6 +1,8 @@
 import importlib
 import os
 
+from decimal import Decimal
+
 
 wallets_module = importlib.import_module("lnbits.wallets")
 wallet_class = getattr(wallets_module, os.getenv("LNBITS_BACKEND_WALLET_CLASS", "LntxbotWallet"))
@@ -10,4 +12,4 @@ LNBITS_DATA_FOLDER = os.getenv("LNBITS_DATA_FOLDER", os.path.join(LNBITS_PATH, "
 
 WALLET = wallet_class()
 DEFAULT_WALLET_NAME = os.getenv("LNBITS_DEFAULT_WALLET_NAME", "LNbits wallet")
-FEE_RESERVE = float(os.getenv("LNBITS_FEE_RESERVE", 0))
+SERVICE_FEE = Decimal(os.getenv("LNBITS_SERVICE_FEE", "0.0"))