module Gateway class CreditCard attr_accessor :InstantBuyKey attr_accessor :CreditCardNumber attr_accessor :HolderName attr_accessor :SecurityCode attr_accessor :ExpMonth attr_accessor :ExpYear attr_accessor :CreditCardBrand attr_accessor :BillingAddress def initialize @BillingAddress = BillingAddress.new end def to_json hash = {} instance_variables.each { |var| hash[var.to_s.delete('@')] = instance_variable_get(var) } hash end end end