Auto Rubocop

 module Var
   class ConektaCardHandler < ConektaHandler
-    PAYMENT_METHOD_STRING = "Card".freeze
+    PAYMENT_METHOD_STRING = 'Card'.freeze
   end
 end

@@ -5,7 +5,7 @@ module Var
     class << self
       def analyze(event)
         process_payment event[:data][:object] if
-          event[:data][:object][:status] == "paid"
+          event[:data][:object][:status] == 'paid'
         process_charge event[:data][:object]
       end
 

 module Var
   class ConektaOxxoHandler < ConektaHandler
-    PAYMENT_METHOD_STRING = "OXXO".freeze
+    PAYMENT_METHOD_STRING = 'OXXO'.freeze
   end
 end

 module Var
   class ConektaSpeiHandler < ConektaHandler
-    PAYMENT_METHOD_STRING = "Bank Transfer".freeze
+    PAYMENT_METHOD_STRING = 'Bank Transfer'.freeze
   end
 end

@@ -38,11 +38,11 @@ module Var
       else
         payment_type = event[:data][:object][:payment_method][:object]
         case payment_type
-        when "cash_payment"
+        when 'cash_payment'
           ConektaOxxoHandler.analyze(event)
-        when "card_payment"
+        when 'card_payment'
           ConektaCardHandler.analyze(event)
-        when "bank_transfer_payment"
+        when 'bank_transfer_payment'
           ConektaSpeiHandler.analyze(event)
         end
       end
@@ -77,7 +77,6 @@ module Var
     def supported_service?(service)
       VALID_SERVICES.include? service
     end
-
   end
 end