switch to polling for btcpay payment sessions because btcpay web hooks

are super duper slow

capsulflask/payment.py

@@ -77,23 +77,12 @@ def btcpay_payment():
   return render_template("btcpay.html", invoice_id=invoice_id)
 
 
-@bp.route("/btcpay/webhook", methods=("POST",))
-def btcpay_webhook():
-  
-  current_app.logger.info(f"got btcpay webhook")
-
-  # IMPORTANT! there is no signature or credential for the data sent into this webhook :facepalm:
-  # its just a notification, thats all.
-  request_data = json.loads(request.data)
-  invoice_id = request_data['id']
-
-  current_app.logger.info(f"got btcpay webhook with invoice_id={invoice_id}")
-
+def poll_btcpay_session(invoice_id):
   # so you better make sure to get the invoice directly from the horses mouth! 
   invoice = current_app.config['BTCPAY_CLIENT'].get_invoice(invoice_id)
 
   if invoice['currency'] != "USD":
-    abort(400, "invalid currency")
+    return [400, "invalid currency"]
   
   dollars = invoice['price']
 
@@ -110,7 +99,21 @@ def btcpay_webhook():
   elif invoice['status'] == "expired" or invoice['status'] == "invalid":
     get_model().btcpay_invoice_resolved(invoice_id, False)
   
-  return {"msg": "ok"}, 200
+  return [200, "ok"]
+
+@bp.route("/btcpay/webhook", methods=("POST",))
+def btcpay_webhook():
+  
+  current_app.logger.info(f"got btcpay webhook")
+
+  # IMPORTANT! there is no signature or credential for the data sent into this webhook :facepalm:
+  # its just a notification, thats all.
+  request_data = json.loads(request.data)
+  invoice_id = request_data['id']
+
+  result = poll_btcpay_session(invoice_id)
+
+  abort(result[0], result[1])