feat: use custom mempool_endpoint for the charge details

lnbits/extensions/satspay/views.py

@@ -9,6 +9,7 @@ from starlette.responses import HTMLResponse
 from lnbits.core.crud import get_wallet
 from lnbits.core.models import User
 from lnbits.decorators import check_user_exists
+from lnbits.extensions.watchonly.crud import get_config
 
 from . import satspay_ext, satspay_renderer
 from .crud import get_charge
@@ -31,8 +32,14 @@ async def display(request: Request, charge_id: str):
             status_code=HTTPStatus.NOT_FOUND, detail="Charge link does not exist."
         )
     wallet = await get_wallet(charge.lnbitswallet)
+    onchainwallet_config = await get_config(charge.user)
     inkey = wallet.inkey if wallet else None
     return satspay_renderer().TemplateResponse(
         "satspay/display.html",
-        {"request": request, "charge_data": charge.dict(), "wallet_inkey": inkey},
+        {
+            "request": request,
+            "charge_data": charge.dict(),
+            "wallet_inkey": inkey,
+            "mempool_endpoint": onchainwallet_config.mempool_endpoint,
+        },
     )