gateway.rb

class Gateway
  attr_reader :connection
  
  def initialize(connection = Application.config.default_connection)
    @connection = connection
  end
  
  def get(params)
    request(:get, params)
  end
  
  # ...
  
  private
  
  def request(method, params)
    begin
      return @connection.send(method, params)
    rescue Faraday::Error::ResourceNotFound => e
      raise GatewayException.new(e)
    end
  end
end