[REFACTOR] WalletType into enum (#1888)

* [REFACTOR] WalletType into enum

- move wallettype models from decorators.py into models.py
- use enum instead of int
- use HTTPStatus for consistency

* Update lnbits/core/models.py

Co-authored-by: jackstar12 <62219658+jackstar12@users.noreply.github.com>

* use dataclass

---------

Co-authored-by: jackstar12 <62219658+jackstar12@users.noreply.github.com>

lnbits/core/views/api.py

@@ -38,6 +38,7 @@ from lnbits.core.models import (
     PaymentFilters,
     User,
     Wallet,
+    WalletType,
 )
 from lnbits.db import Filters, Page
 from lnbits.decorators import (
@@ -102,7 +103,7 @@ async def health():
 
 @core_app.get("/api/v1/wallet")
 async def api_wallet(wallet: WalletTypeInfo = Depends(get_key_type)):
-    if wallet.wallet_type == 0:
+    if wallet.wallet_type == WalletType.admin:
         return {
             "id": wallet.wallet.id,
             "name": wallet.wallet.name,
@@ -318,7 +319,7 @@ async def api_payments_create(
     wallet: WalletTypeInfo = Depends(require_invoice_key),
     invoiceData: CreateInvoice = Body(...),
 ):
-    if invoiceData.out is True and wallet.wallet_type == 0:
+    if invoiceData.out is True and wallet.wallet_type == WalletType.admin:
         if not invoiceData.bolt11:
             raise HTTPException(
                 status_code=HTTPStatus.BAD_REQUEST,