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Unzer

Authorize a payment

Reserve money on the customer’s account.

Overview

The authorization call verifies payment details and checks for sufficient funds on the customer account. If the check is successful, the funds are reserved for at least 7 days. If the authorization is not debited within this period, the authorization expires and the amount is released.

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The authorization does not trigger a debit transaction. It only reserves the amount for the customer’s payment type. To execute money transfer you have to perform a charge after authorization.

This transaction is possible for selected payment methods only. For more details, see Payment methods.

Example

In general, the transaction calls on a payment type require at least the amount, the currency, and the returnUrl.

Option 1: Authorize using an Unzer object

// basic charge example
Unzer unzer  = new Unzer("s-priv-xxxxxxxxxx");
Authorize authorize = unzer.authorize(BigDecimal.valueOf(12.99), Currency.getInstance("EUR"), "s-crd-9wmri5mdlqps", "https://your.return.url");

Option 2: Authorize using payment type object

// basic charge example
Unzer unzer = new Unzer("s-priv-xxxxxxxxxx");
Card card = (Card) unzer.fetchPaymentType("s-crd-9wmri5mdlqps");
Authorize authorize = card.authorize(BigDecimal.valueOf(12.99), Currency.getInstance("EUR"), "https://your.return.url");

Arguments to Unzer.authorize

Parameter Type Description
amount
(required)
float The amount to be authorized.
currency
(required)
string The currency of the amount.
paymentType
(required)
string The payment type object or the ID of the payment type to use.
returnUrl
(required)
string The URL to which the customer will be redirected, after the transaction is complete.
customer* string A reference to the customer resource corresponding to this payment.
This can be either a customer object or the ID of an existing customer resource.
For more details, see Manage customer.
orderId string The ID of the order in your store.
This ID can be used later to fetch the payment resource from the API using the method Unzer::fetchPaymentByOrderId("myId123")
metadata* string A reference to the metadata corresponding to this payment.
The metadata object can be used to pass along custom information which you wish to reference to the payment.
For more details, see Manage metadata.
basket* string A reference to the basket corresponding to this payment.
For more details, see Manage baskets.
card3ds boolean Allows to switch between a 3DS and non-3DS channel, if both are configured for the merchant. Otherwise it will be ignored.
invoiceId string This is used to transmit the invoice ID from your shop to the API. For Unzer Invoice payments, the invoice ID is required.
paymentReference string This is a reference string to show the customer the purpose of the transaction. This will be shown on the bank statement of the buyer.
recurrenceType string Recurrence type used for recurring payment.
Available values: scheduled, unscheduled, one click
* If an object is used, the ID for which is not set (the resource is currently not available in the Payment API), the customer resource is automatically created and referenced with the transaction call.

Arguments to authorize of payment type

Parameter Type Description
amount
(required)
float The transaction amount to be charged
currency
(required)
string The currency of the amount.
returnUrl
(required)
string The URL the customer will be redirected to after a transaction.
This needs to be set to a valid URL, no matter whether a redirect is necessary or not.
customer string A reference to the customer resource corresponding to this payment.
This can either be a customer object or the ID of an existing customer resource. If there is no customer resource available, an ID is automatically created and referenced in this transaction call.
For more details, see Manage customer

Transaction results

The authorization object is updated with the data from the PAPI response. It contains the paymentId (e.g s-pay-1) the transactionId and other properties. The transaction object provides getter functions to access those properties.

The status-parameter indicate the result of the transaction. The Enum can only be SUCCESS, PENDING, or ERROR.

If the transaction fails, the payment API returns an error resource. In the SDK this is handled as an UnzerPaymentException. Make sure to catch the exception type and handle it as properly.

You can find an example transaction response on the Authorize a payment page inside direct API integration.

try {
    Unzer unzer  = new Unzer("s-priv-xxxxxxxxxx");
    Authorize authorize = unzer.authorize(BigDecimal.valueOf(12.99), Currency.getInstance("EUR"), "s-crd-9wmri5mdlqps", "https://your.return.url");

    if (authorize.Status.equals(Authorize.Status.SUCCESS)) {
        this.redirectToSuccess();
    }
    // Transaction has to be pending at this point.
    this.redirectToPending();
} catch (HttpCommunicationException | PaymentException e) {
    // Transaction failed. API returned error resource.
    List<PaymentError> paymentErrorList = e.getPaymentErrorList();
    //Handle API Errors
    
    this.redirectToFailure(); // redirect to the failure page of your shop
} catch (Exception e) {
    merchantMessage = e.getMessage();
}

See also