Sample code for implementation vt-web with activemerchant

veritrans_vtweb_activemerchant_snippet.rb

merchant_id       = 'XXXXXXXXXXXXXXXXXXX'
merchant_hash_key = 'XXXXXXXXXXXXXXXXXXX'

# implemetation for generating form 
payment_service_for @order.id, merchant_id, \
  merchant_hash_key:  merchant_hash_key, 
  service:            :veritrans,
  amount:             @order.total_amount,
  currency:           'IDR',
  html:               {:id => 'payment-form' , :authenticity_token => false } do |service|

  service.cancel_url  = "http://example.com/cancel"
  service.error_url   = "http://example.com/error"
  service.return_url  = "http://example.com/return"

  service.customer    first_name:   @order.billing_first_name,
                      last_name:    @order.billing_last_name,
                      address_1:    @order.billing_address_1,
                      address_2:    @order.billing_address_2,
                      city:         @order.billing_city,
                      zip:          @order.billing_postal_code,
                      phone:        @order.billing_phone,
                      country_code: 'IDN',
                      email:        '[email protected]'


  service.shipping    first_name:   @order.shipping_first_name,
                      last_name:    @order.shipping_last_name,
                      address_1:    @order.shipping_address_1,
                      address_2:    @order.shipping_address_2,
                      city:         @order.shipping_city,
                      zip:          @order.shipping_postal_code,
                      phone:        @order.shipping_phone,
                      country_code: 'IDN'

  @order.order_items.each do |item|
    service.items <<  {id:      item.product_id,
                       price:   item.price,
                       qty:     item.qty,
                       name:    item.product_name}
  end
# implemetation for handle notification
@notification = ActiveMerchant::Billing::Integrations::Veritrans::Notification.new request.raw_post \
  merchant_id:          merchant_id, 
  mecrhant_hash_key:    merchant_hash_key

@order.paid! if @notification.acknowledge

and also I have wrote a snipet how to use it

So how to use it? :)