Paypal express checkout setup purchase with options

gistfile1.rb

require 'rubygems'
require 'activemerchant'

ActiveMerchant::Billing::Base.mode = :test
paypal_options = {
  :login => 'xxx',
  :password => 'yyy',
  :signature => 'zzz'
}
::PAYPAL_EXPRESS_GATEWAY = ActiveMerchant::Billing::PaypalExpressGateway.new(paypal_options)

response = PAYPAL_EXPRESS_GATEWAY.setup_purchase(1000,
                                                 :ip                => '127.0.0.1',
                                                 :return_url        => 'http://localhost:3000',
                                                 :cancel_return_url => 'http://localhost:3000',
                                                 :header_background_color => 'ff0000',
                                                 :email => 'pioz@pioz.it',
                                                 :allow_note => false,
                                                 :allow_guest_checkout => true,
                                                 :locale => 'IT',
                                                 :address => {
                                                   :name => 'Enrico',
                                                   :last_name => 'Pilotto',
                                                   :address1 => 'via fuck yeah 12',
                                                   :city => 'Padova',
                                                   :state => 'Padova',
                                                   :county => 'IT',
                                                   :zip => 35100,
                                                   :phone => '0499460022'
                                                 }
                                                 )

url = PAYPAL_EXPRESS_GATEWAY.redirect_url_for(response.token)

puts url