fix :

- implement notify_url and app_id to be dynamic

app/services/kbz_merchant.rb

@@ -31,11 +31,14 @@ class KbzMerchant
   private
 
   def build_create_payload(amount, merch_order_id, timeout)
+    json_params = @payment_method.additional_parameters.inspect.undump
+    params = JSON.parse(json_params)
+    byebug
     base_params = {
       method: 'kbz.payment.precreate',
       timestamp: Time.now.utc.to_i.to_s,
       nonce_str: SecureRandom.hex(16),
-      notify_url: 'https://example.com/notify',
+      notify_url: params['notify_url'],
       sign_type: 'SHA256',
       version: '1.0',
       biz_content: {