Accept Sofort/Klarna payments in your online store.
Sofort allows your customers to make payments through direct bank transfer. Use the emerchantpay Sofort API to accept Sofort as a payment method across all of emerchantpay’s payment integrations.
|Payment method||Countries/regions||Supported payments|
|Real time bank transfer||Austria, Belgium, Germany, Italy, Netherlands, Poland, Spain, Switzerland||Online banking|
To proceed with this solution, you must have an emerchantpay merchant account. Apply for a merchant account by filling out and submitting this contact form.You will be assigned an emerchantpay Account Manager, who will provide you with credentials and assist you with any of emerchantpay’s payment solutions.
To integrate with Sofort, connect to the emerchantpay Genesis gateway using the emerchantpay Sofort API. You should have a working knowledge of web programming languages, HTTP methods in XML and JSON formats, and UTF8 encoding. Use the Genesis SDK libraries with code samples to integrate with the gateway in a range of languages.For a solution that requires less development overhead, accept Sofort payments through the emerchantpay Web Payment Form (WPF). Contact your Account Manager and tell them you want to accept Sofort through the WPF, and refer to the WPF API.
1. Create a Sofort payment request
To submit a payment using Sofort, create a payment request to the emerchantpay Genesis payment gateway. Specify sofort as the
<?xml version=”1.0″ encoding=”UTF-8″?> <payment_transaction> <transaction_type>sofort</transaction_type> <transaction_id>119643250547501c79d8295</transaction_id> <usage>40208 concert tickets</usage> <remote_ip>123.456.789.0</remote_ip> <return_success_url>http://www.example.com/success</return_success_url> <return_failure_url>http://www.example.com/failure</return_failure_url> <return_pending_url>http://www.example.com/pending</return_pending_url> <return_notification_url>http://www.example.com/notification</return_notification_url> <amount>100</amount> <currency>EUR</currency>
2. Receive a response
You will receive a Success or Error response to your payment request.Example of a Success response:
<?xml version=”1.0″ encoding=”UTF-8″?> <payment_response> <transaction_type>sofort</transaction_type> <status>pending_async</status> <mode>live</mode> <transaction_id>119643250547501c79d8295</transaction_id> <unique_id>44177a21403427eb96664a6d7e5d5d48</unique_id> <technical_message>Transaction successful!</technical_message> <message>Transaction successful!</message> <redirect_url>https://staging.gate.emerchantpay.net/redirect/to_acquirer/649e1ff35c61</redirect_url> <timestamp>2022-06-29T15:36:40Z</timestamp> <descriptor>Descriptor one</descriptor> <amount>100</amount> <currency>EUR</currency> <sent_to_acquirer>true</sent_to_acquirer> </payment_response>
redirect_urlto redirect your customer to authorise the payment with Sofort. See the emerchantpay Sofort API for the complete list of Sofort response parameters and code samples.
Because the Sofort payment transaction is asynchronous, the result of your customer’s payment is sent as a separate HTTP POST notification from the gateway to the
notification_url that you supplied with the transaction request.
“transaction_id”: “45353c0c179bafc4a1cf79bf00720c47” “terminal_token”: “ec1a6c3fd379accb048eeb76bf9e9dd858af42e1” “unique_id”: “a96f8bc88c392b691e17856f8f2864b2” “transaction_type”: “sofort” “status”: “approved” “signature”: “ef595c87c2fc2ad3eeb7581c672a2b2cf2f0e506” “amount”: “1100” “funds_status”: “WAITING” “account_holder”: “John Smith” “bank_account_number”: “DE06000000000023456789” “bank_identifier_code”: “SFRTDE20XXX”
statusfield provides you with information on the outcome of the transaction. See Transaction States for more information about transaction statuses.
signature field to verify that the notification has been sent by the Genesis gateway. Each session signature is generated by combining the
unique_id of the transaction and your API password, and generating a SHA-1 hash function of the combined string.
Notification signature examples:
signature = SHA-1 hash value of
After you have verified the notification state and validity, render an XML page containing the transaction’s unique id to acknowledge that you have received the notification.Example of a notification reply you use to confirm a notification:
<?xml version=”1.0″ encoding=”UTF-8″?> <notification_echo> <unique_id>3f760162ef57a829011e5e2379b3fa17</unique_id> </notification_echo>
3. Test your integration
Before you can accept live payments, you must test your integration in the emerchantpay staging environment.
- Add an item to your cart in your online store.
- Proceed to the checkout page and check out using Sofort.
- Follow the redirect link to the Sofort login.
- Search for and select Demo Bank.
- Complete the order and verify that you are redirected to the order confirmation page.
- Log in to Genesis.
- In the navigation menu, go to Payment transactions.
- Verify that the transaction appears at the top of the list and is successful.
4. Accept live payments
After you have successfully tested your Sofort integration, you are ready to move to the production environment and accept live payments. Contact your emerchantpay Account Manager to get your login credentials for the Genesis production environment.
You are now ready to accept live payments using Sofort.