Thoughts on wrapping the Realex Vault API for ActiveMerchant

example.rb

response = store(cc)
token = response.authorization #=> "#{payer_ref}:#{card_ref}"

update(token, {...})

realex.rb

def store(cc, options={})
  payer_ref = (options[:customer] || generate_unique_id[0...30])
  card_ref = (options[:card_reference] || generate_unique_id[0...30])
  MultiResponse.new.tap do |r|
    r.process{store_payer(payer_ref, options)}
    r.process{store_card(payer_ref, card_ref, options)}
  end
end

def update(token, options)
  ...
end