In the previous article we uncovered how to do Ruby on Rails online payments with Adyen using encrypted form without redirect of users to external checkout pages. Now it’s time for another type of integration: Hosted Payment Pages (HPP).
Why Ruby on Rails online payments with Adyen HPP
You can easily do Ruby on Rails online payments with Stripe, BrainTree, and many others. We have experience integrating these online payments to Ruby on Rails web app during just one day. However, competitive advantage of Adyen’s HPP is that in addition to PayPal and credit card, Adyen’s HPP can allow your Ruby on Rails direct bank payment, with such mathods as SEPA, SOFORT, iDEAL, etc.
HPP provides a secure, flexible and easy way for customers to purchase services and goods:
- Customers go to your site, then they select and add the services/items to a shopping cart.
- Next, they are redirected to the hosted payment page, where they enter the billing details to process the payment.
- After submitting they are redirected back to your web site, where they can see a summary information displaying the result of the payment processing.
- You can customise the look of the HPP using Adyen’s skin technology and toolset to create a seamless checkout for your customers.
Prepare account for using HPP
Generagte HMAC key to be used in your payment request’s signature and add a method to prepare your HPP URI:
def gs(i) # adyen merchant signature params escaping i.gsub(':', ':').gsub('\', '\\') end def hpp_uri(order) user = order.user merchant_reference = "your_prefix_" + user.id.to_s + "_" + order.id.to_s + "_" + rand(99999999).to_s merchant_account = ENV['ADYEN_MERCHANT_ACCOUNT'] payment_amount = (order.total*100).to_i.to_s currncy = order.currency session_validity = 1.day.from_now.strftime('%Y-%m-%dT%H:%M:%SZ') ship_before_date = order.shipment.date.strftime('%Y-%m-%d') # ---- merchant signature ---- string = "currencyCode:merchantAccount:merchantReference:paymentAmount:recurringContract:sessionValidity:shipBeforeDate:shopperEmail:shopperLocale:shopperReference:skinCode" string += ':'+gs(currency) string += ':'+gs(merchant_account) string += ':'+gs(merchant_reference) string += ':'+gs(payment_amount) string += ':ONECLICK' string += ':'+gs(session_validity) string += ':'+gs(ship_before_date) string += ':'+gs(user.email) string += ':'+gs(I18n.locale.to_s) string += ':'+gs(user.shopper_reference) string += ':'+gs('YOUR_HPP_SKIN_CODE') hmac = Order.create_hmac(string) # ---- merchant signature ---- uri = ENV['ADYEN_HPP_ENDPOINT'] # 'https://test.adyen.com/hpp/pay.shtml' uri += '?' uri += "merchantSig="+Rack::Utils.escape(hmac) uri += "&sessionValidity="+session_validity uri += "&shipBeforeDate="+ship_before_date uri += "&shopperLocale="+I18n.locale.to_s uri += "&merchantAccount="+merchant_account uri += "&paymentAmount="+payment_amount uri += "¤cyCode="+currency uri += "&skinCode="+'YOUR_HPP_SKIN_CODE' uri += "&merchantReference="+merchant_reference uri += "&shopperReference="+user.shopper_reference uri += "&recurringContract=ONECLICK" uri += "&shopperEmail="+user.email end
Prepare your application to process HPP payments
Create a new endpoint in your Orders controller where user will be redirected after payment processing:
def payment_processed return redirect_to root_url, alert: 'Adyen request invalid' unless params[:merchantReference] order_id = params[:merchantReference].split('_').to_i order = Order.find order_id if ['refused', 'error', 'cancelled'].include?(params[:authResult].downcase) || Adyen.capture(params[:pspReference], (order.total*100).to_i, order.currency)['response'] != '[capture-received]' # process failed payment redirect_to order, alert: I18n.t('payment_failed') else # process success payment redirect_to order end end
Add this endpoint to your Adyen’s HPP skin:
In your Orders controller #create action setup redirect to Adyen HPP:
def create order = Order.new(order_params) if order.save redirect_to Adyen.hpp_uri(order) else render :new end end
And now you are ready for global online payments and EU direct bank payments!