block

  execute("transactionStart") do |message|
     @token_value = message.url_screen
  end

  def execute(name, &block)
    body = self.send("#{name}_body")
    message = Message.new(name, body)
    block.call(message)
  rescue WSFault => wsfault
    message = nil
    ...
  ensure
    message
  end

Message

class GatewayPayment

  class Message
    attr_accessor :action
    TO = "https://preprod.verifika.com/VPOS/services/VPOSMMWSS11?wsdl"
    ACTION_BASE = "http://www.alignet.com/VPOSMMWSS11/"
 
    def initialize(action, body)
      @action = action
      @body = body
      build_message
    end

    def build_message
      WSMessage(...)
    end
  end
end