fix : qr code generation to be dynamic

app/services/kbz_merchant.rb

@@ -5,20 +5,18 @@ class KbzMerchant
 
   def initialize(payment_method)
     @payment_method = payment_method
-    @api_url = payment_method.test_mode? ?
-        'http://api.kbzpay.com/payment/gateway/uat/precreate' :
-        'https://api.kbzpay.com/payment/gateway/precreate'
+    @api_url ='http://api.kbzpay.com/payment/gateway/uat/precreate'
   end
 
-  def create_order(transaction_params)
-    payload = build_payload(transaction_params)
+  def create_order(amount:, merch_order_id:)
+    payload = build_payload(amount, merch_order_id)
     response = send_request(payload)
     handle_response(response)
   end
 
   private
 
-  def build_payload(params)
+  def build_payload(amount, merch_order_id, timeout='120m')
     base_params = {
       method: 'kbz.payment.precreate',
       timestamp: Time.now.utc.to_i.to_s,
@@ -27,13 +25,13 @@ class KbzMerchant
       sign_type: 'SHA256',
       version: '1.0',
       biz_content: {
-        appid: @payment_method.appid,
-        merch_code: @payment_method.merch_code,
-        merch_order_id: params[:merch_order_id],
+        appid: @payment_method.gateway_url,
+        merch_code: @payment_method.merchant_account_id,
+        merch_order_id: merch_order_id,
         trade_type: 'PAY_BY_QRCODE',
-        total_amount: params[:total_amount].to_s,
+        total_amount: amount.to_s,
         trans_currency: 'MMK',
-        timeout_express: params[:timeout] || '120m'
+        timeout_express: timeout || '120m'
       }.compact
     }
 
@@ -53,11 +51,10 @@ class KbzMerchant
   end
 
   def generate_signature(flattened_params)
-    key = 'uatfoodcourt@12'
     sorted_params = flattened_params.except('sign', 'sign_type').sort
     string_a = sorted_params.map { |k, v| "#{k}=#{v}" }.join('&')
     puts "String a: #{string_a}"
-    string_to_sign = "#{string_a}&key=#{key}"
+    string_to_sign = "#{string_a}&key=#{@payment_method.auth_token}"
     puts "String to sign: #{string_to_sign}"
     Digest::SHA256.hexdigest(string_to_sign).upcase
   end
@@ -78,8 +75,8 @@ class KbzMerchant
         body: { Request: payload }.to_json,
         timeout: 15
       )
-
-    puts "Response: #{response}"
+    response.body
+    # puts "Response: #{response}"
     rescue HTTParty::Error => e
       raise PaymentError, "HTTP error: #{e.message}"
     rescue SocketError => e
@@ -89,7 +86,7 @@ class KbzMerchant
 
 
   def handle_response(response)
-    json_response = JSON.parse(response.body)
+    json_response = JSON.parse(response)
     if json_response.dig('Response', 'result') == 'SUCCESS'
       json_response['Response']
     else