Route checkout through public BTCPay domain

app.py

@@ -32,7 +32,7 @@ def create_btcpay_invoice(order_id):
         "amount": PRICE_USD,
         "currency": "USD",
         "metadata": {"orderId": order_id},
-        "checkout": {"redirectURL": f"/?paid=1&order={order_id}"},
+        "checkout": {"redirectURL": f"https://nocturne.thetempleofdoom.com/?paid=1&order={order_id}"},
     }).encode()
     req = urllib.request.Request(
         f"{BTCPAY_URL}/api/v1/stores/{BTCPAY_STORE}/invoices",
@@ -42,7 +42,12 @@ def create_btcpay_invoice(order_id):
     try:
         with urllib.request.urlopen(req, timeout=20, context=ctx) as r:
             data = json.loads(r.read())
-        return data.get("checkoutLink") or data.get("checkout_url")
+        url = data.get("checkoutLink") or data.get("checkout_url")
+        if url:
+            # API returns a LAN address; rewrite to the public BTCPay domain
+            # so customers outside the network can reach the checkout.
+            url = url.replace("10.30.20.140", "btcpay.thetempleofdoom.com")
+        return url
     except Exception as e:
         app.logger.error(f"BTCPay invoice error: {e}")
         return None