diff --git a/app/services/kbz_merchant.rb b/app/services/kbz_merchant.rb
index c7d75b2a..fc4b7dfb 100644
--- a/app/services/kbz_merchant.rb
+++ b/app/services/kbz_merchant.rb
@@ -5,24 +5,29 @@ class KbzMerchant
 
   def initialize(payment_method)
     @payment_method = payment_method
+    @url = @payment_method.gateway_url
+    json_params = @payment_method.additional_parameters.inspect.undump
+    params = JSON.parse(json_params)
+    @notify_url = params['notify_url']
+    @app_id = params['app_id']
   end
 
   def create_order(amount:, merch_order_id:, timeout: '120m')
-    api_url = 'http://api.kbzpay.com/payment/gateway/uat/precreate'
+    api_url = "#{@url}/precreate"
     payload = build_create_payload(amount, merch_order_id, timeout)
     response = send_request(payload, api_url)
     handle_response(response)
   end
 
   def close_order(merch_order_id:)
-    api_url ='http://api.kbzpay.com/payment/gateway/uat/closeorder'
+    api_url = "#{@url}/closeorder"
     payload = build_close_payload(merch_order_id)
     response = send_request(payload, api_url)
     handle_response(response)
   end
 
   def query_order(merch_order_id:)
-    api_url = 'http://api.kbzpay.com/payment/gateway/uat/queryorder'
+    api_url = "#{@url}/queryorder"
     payload = build_query_payload(merch_order_id)
     response = send_request(payload, api_url)
     handle_response(response)
@@ -31,18 +36,15 @@ 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: params['notify_url'],
+      notify_url: @notify_url,
       sign_type: 'SHA256',
       version: '1.0',
       biz_content: {
-        appid: @payment_method.gateway_url,
+        appid: @app_id,
         merch_code: @payment_method.merchant_account_id,
         merch_order_id: merch_order_id,
         trade_type: 'PAY_BY_QRCODE',
@@ -64,7 +66,7 @@ class KbzMerchant
       sign_type: 'SHA256',
       version: '3.0',
       biz_content: {
-        appid: @payment_method.gateway_url,
+        appid: @app_id,
         merch_code: @payment_method.merchant_account_id,
         merch_order_id: merch_order_id
       }.compact