Add support for invoice cancellation

CHANGELOG.md

@@ -4,6 +4,10 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [2.8.0] - 2026-03-04
+### Added
+- Support for Klarna invoice cancellation
+
 ## [2.7.6] - 2025-12-10
 ### Added
 - Support for PHP 8.5

README.md

@@ -109,6 +109,8 @@ List of `Client::class` methods
 | createMitPaymentAuthorizationHold() | Create MiT authorization hold                        |
 | createMitPaymentCommit()            | Commit MiT authorization hold                        |
 | revertPaymentAuthorizationHold()    | Revert existing Mit or CiT authorization hold        |
+| activateInvoice()                   | Activate pending invoice (Walley / Klarna)           |
+| cancelInvoice()                     | Cancel pending invoice (Currently only Klarna)       |
 | getSettlements() [Deprecated]       | Deprecated Request settlements                       |
 | requestSettlements()                | Request settlements                                  |
 | requestPaymentReport()              | Request payment report                               |

src/Client.php

@@ -33,6 +33,7 @@
 use Paytrail\SDK\Response\RevertPaymentAuthHoldResponse;
 use Paytrail\SDK\Response\SettlementResponse;
 use Paytrail\SDK\Response\InvoiceActivationResponse;
+use Paytrail\SDK\Response\InvoiceCancellationResponse;
 use Paytrail\SDK\Util\Signature;
 use Paytrail\SDK\Exception\HmacException;
 use Paytrail\SDK\Exception\ValidationException;
@@ -782,13 +783,13 @@ function ($decoded) {
     }
 
     /**
-     * Activate invoice created with manualInvoiceActivation set to true
+     * Activate invoice created with manualInvoiceActivation set to true. Supported payment methods: Walley, Klarna
      *
      * @param string $transactionId
      * @return InvoiceActivationResponse
      * @throws HmacException
      */
-    public function activateInvoice(string $transactionId)
+    public function activateInvoice(string $transactionId): InvoiceActivationResponse
     {
         $uri = "/payments/{$transactionId}/activate-invoice";
 
@@ -809,6 +810,27 @@ function ($decoded) {
         );
     }
 
+    /**
+     * Cancel invoice created with manualInvoiceActivation set to true. Supported payment methods: Klarna
+     *
+     * @param string $transactionId
+     * @return InvoiceCancellationResponse
+     * @throws HmacException
+     */
+    public function cancelInvoice(string $transactionId): InvoiceCancellationResponse
+    {
+        $uri = "/payments/{$transactionId}/cancel-order";
+
+        $response = $this->post($uri, null, null, $transactionId);
+
+        $decoded = json_decode((string) $response->getBody());
+
+        return (new InvoiceCancellationResponse())
+            ->setStatus($decoded->status)
+            ->setMessage($decoded->message)
+            ->setHttpStatusCode($response->getStatusCode());
+    }
+
     /**
      * A proxy for the Signature class' static method
      * to be used via a client instance.

src/Response/InvoiceActivationResponse.php

@@ -1,7 +1,7 @@
 <?php
 
 /**
- * Class RefundResponse
+ * Class InvoiceActivationResponse
  */
 
 declare(strict_types=1);
@@ -11,7 +11,7 @@
 use Paytrail\SDK\Interfaces\ResponseInterface;
 
 /**
- * Class RefundResponse
+ * Class InvoiceActivationResponse
  *
  * @package Paytrail\SDK\Response
  */

src/Response/InvoiceCancellationResponse.php

@@ -0,0 +1,63 @@
+<?php
+
+/**
+ * Class InvoiceCancellationResponse
+ */
+
+declare(strict_types=1);
+
+namespace Paytrail\SDK\Response;
+
+use Paytrail\SDK\Interfaces\ResponseInterface;
+
+/**
+ * Class InvoiceCancellationResponse
+ *
+ * Possible HTTP status codes returned by Paytrail API:
+ *   201 - Invoice cancelled
+ *   202 - Invoice cancellation requested, status of the payment will be updated asynchronously
+ *   200 - Invoice already cancelled
+ *   400 - Invalid request. Refer to body message for more information
+ *   500 - Other error. Refer to body message for more information
+ *
+ * @package Paytrail\SDK\Response
+ */
+class InvoiceCancellationResponse implements ResponseInterface
+{
+    protected $status;
+    protected $httpStatusCode;
+    protected $message;
+
+    public function getStatus(): ?string
+    {
+        return $this->status;
+    }
+
+    public function setStatus(?string $status): InvoiceCancellationResponse
+    {
+        $this->status = $status;
+        return $this;
+    }
+
+    public function getMessage(): ?string
+    {
+        return $this->message;
+    }
+
+    public function setMessage(?string $message): InvoiceCancellationResponse
+    {
+        $this->message = $message;
+        return $this;
+    }
+
+    public function getHttpStatusCode(): ?int
+    {
+        return $this->httpStatusCode;
+    }
+
+    public function setHttpStatusCode(?int $httpStatusCode): InvoiceCancellationResponse
+    {
+        $this->httpStatusCode = $httpStatusCode;
+        return $this;
+    }
+}