Issue #3486635 by Aerzas: Use transaction data when creating payment if available

Closes #3486635

src/Plugin/Commerce/PaymentGateway/DatatransBase.php

@@ -161,11 +161,15 @@ class DatatransBase extends PaymentGatewayBase implements SupportsRefundsInterfa
     }
 
     if (!$payment) {
+      $transaction_amount = $transaction_data['detail']['settle']['amount'] ?? $transaction_data['detail']['authorize']['amount'] ?? NULL;
       $payment_storage = $this->entityTypeManager->getStorage('commerce_payment');
       // Create a payment if there is none yet.
       // @todo: Support non-complete payment amount for new payment?
       $payment = $payment_storage->create([
-        'amount' => $order->getTotalPrice(),
+        'amount' => new Price(
+          isset($transaction_amount) ? ($transaction_amount / 100) : $order->getTotalPrice()->getAmount(),
+          $transaction_data['currency']
+        ),
         'payment_gateway' => $this->parentEntity->id(),
         'order_id' => $order->id(),
         'remote_id' => $transaction_data['transactionId'],