PayPal is an online payment service that lets customers use their PayPal account to make online purchases. Customers store their credit or debit cards in their PayPal account and use that account to pay.

Step 1. Make a transaction request

From your server, make a POST /payment_preauthorize request.

POST https://sandbox.powercash21.com/pay/backoffice/payment_preauthorize

Include in request:

• merchantid: The merchant identification number.
• orderid: The field orderid is optional and exclusively for the merchant's convenience.
• amount: The amount field contains the transaction’s total amount. This is the amount that will be transmitted to the authorizing system.
• currency: The currency field contains the alphanumeric currency code for the transaction, according to ISO 4217.
• payment_method: The payment method id - 117.
• signature: The signature field contains a 40-figure hexadecimal value. This signature value is a checksum designed to protect the merchant account from unauthorized access.
• country: Customer country in ISO Alpha-3 format. Supported countries: AUT, DEU, etc.
• email: The customer's email address.
• accountname: Accountname: 3 to 100 Characters
  You can see a full list of parameters in Pre-Authorization.

Request example

/powercash21-3-2/backoffice/payment_preauthorize&merchantid=andrei&amount=1.22&currency=USD&
orderid=Powercash21-Test&language=en&gender=M&lastname=Mann&street=An+der+Welle+4&zip=60322&
city=Frankfurt&country=DEU&customerid=&salutation=Herr&title=&firstname=Muster&company=Powercash21&
birthday=07071971&house=19&postbox=&state=HE&email=test%40inatec.com&phone=XXXXXXXXXX8501&
fax=&mobile=&customerip=127.0.0.1&custom1=123456&custom2=&custom3=Inatec+Test+Transaction&
url_return=http%3A%2F%2Fdev-sim-ng.inatec.local%2F%7Esimdad%2FInatecResponse%2Fredirect_response.php&
url_success=http%3A%2F%2Fdev-sim-ng.inatec.local%2F%7Esimdad%2FInatecResponse%2Fsuccess.php&
url_failed=http%3A%2F%2Fdev-sim-ng.inatec.local%2F%7Esimdad%2FInatecResponse%2Ffailed.php&
notification_url=http%3A%2F%2F83.169.19.140%2Fsimulation%2Fbilling_response.php&payment_method=117&
signature=6c63bf91b0a44085e24f3e52fba86d7f7052710d

Step 2. Handle the redirect

To complete the payment, you need to redirect the customer to the correct URL in the response.

Response

transactionid=213592364&transid=213592364&status=2000&errormessage=pending&errmsg=pending&
amount=1.22&price=1.22&currency=USD&orderid=Powercash21-Test&payment_method=117&
redirect_url=https%3A%2F%2Fwww.sandbox.paypal.com%2Fcheckoutnow%3Ftoken%3D8HB89670NU291814W&user_id=46930

When the customer finished or canceled the payment, he will be redirected back to url_return, provided by you in the initial request to payment_preauthorize. After that, you will receive a notification, posted to notification_url, with the final transaction status, which you suppose to use to update your system.

Notification URL can be configured by our tech support team in your account on our side,
or you can send it as a parameter notification_url in the initial request to payment_preauthorize.

📘

url_return and notification_url should be provided by you to payabl. technical team.

Notification example

transactionid=213592364&payeeId=LB9QXKG2YMA32&payerId=Z49VA2FXC8B8U&
security=2e1bb923e8eb579ebae3e0b6d5c9f80e8da942ac35ba08673e5a07453fb685c9&
orderid=Powercash21-Test&errormessage=&type=capture&[email protected]&
[email protected]&errorcode=0&timestamp=1634205467" "http://83.169.19.140/simulation/billing_response.php"

Refunds

PayPal supports refunds and can be initiated only on a successful captured transaction.
The request will send a credit note to the authorization system after the customer has already been charged. The refund amount will be credited to the customer, and the merchant’s account will be charged.

The refund can be done in two ways:

• Through API integration
• Through payabl. dashboard

If you have API integration, you can check more in our documentation Refund.