diff --git a/phpstan.neon b/phpstan.neon
index 99b906fe..917b2aca 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -1,7 +1,6 @@
 parameters:
     level: max
     reportUnmatchedIgnoredErrors: false
-    checkMissingIterableValueType: false
     paths:
         - src
 
@@ -11,6 +10,8 @@ parameters:
         - 'tests/Application/src/**.php'
 
     ignoreErrors:
+        - identifier: missingType.iterableValue
+        - identifier: missingType.generics
         - '/Parameter #1 \$configuration of method Symfony\\Component\\DependencyInjection\\Extension\\Extension::processConfiguration\(\) expects Symfony\\Component\\Config\\Definition\\ConfigurationInterface, Symfony\\Component\\Config\\Definition\\ConfigurationInterface\|null given\./'
         - '/Parameter \#1 \$request \([^)]+\) of method [^:]+::execute\(\) should be contravariant with parameter \$request \(mixed\) of method Payum\\Core\\Action\\ActionInterface::execute\(\)/'
         - '/Parameter \$event of method CommerceWeavers\\SyliusTpayPlugin\\Refunding\\Workflow\\Listener\\DispatchRefundListener::__invoke\(\) has invalid type Symfony\\Component\\Workflow\\Event\\TransitionEvent\./'
diff --git a/src/Form/DataTransformer/PaymentDetailsTransformer.php b/src/Form/DataTransformer/PaymentDetailsTransformer.php
index eb9a1443..9220270f 100644
--- a/src/Form/DataTransformer/PaymentDetailsTransformer.php
+++ b/src/Form/DataTransformer/PaymentDetailsTransformer.php
@@ -5,17 +5,20 @@
 namespace CommerceWeavers\SyliusTpayPlugin\Form\DataTransformer;
 
 use Symfony\Component\Form\DataTransformerInterface;
+use Webmozart\Assert\Assert;
 
 class PaymentDetailsTransformer implements DataTransformerInterface
 {
-    public function transform($value): string
+    public function transform(mixed $value): string
     {
-        if (!$value || !array_key_exists('blik', $value)) {
+        Assert::isArray($value);
+        if ($value === [] || !array_key_exists('blik', $value)) {
             return '';
         }
 
         return $value['blik'];
     }
+
     public function reverseTransform($value): array
     {
         return ['blik' => $value];
diff --git a/src/Payum/Action/Api/CreateBlik0TransactionAction.php b/src/Payum/Action/Api/CreateBlik0TransactionAction.php
index bf677cd8..33b38bc5 100644
--- a/src/Payum/Action/Api/CreateBlik0TransactionAction.php
+++ b/src/Payum/Action/Api/CreateBlik0TransactionAction.php
@@ -13,6 +13,7 @@
 use Symfony\Component\Routing\Generator\UrlGeneratorInterface;
 use Symfony\Component\Routing\RouterInterface;
 use Tpay\OpenApi\Api\TpayApi;
+use Webmozart\Assert\Assert;
 
 /**
  * @property TpayApi $api
@@ -21,7 +22,7 @@ final class CreateBlik0TransactionAction extends BaseApiAwareAction implements G
 {
     use GenericTokenFactoryAwareTrait;
 
-    public function __construct (
+    public function __construct(
         private RouterInterface $router,
         private string $successRoute,
         private string $errorRoute,
@@ -38,17 +39,25 @@ public function execute($request): void
         /** @var PaymentInterface $model */
         $model = $request->getModel();
         $details = $model->getDetails();
+        $token = $request->getToken();
+        Assert::notNull($token);
 
         $order = $model->getOrder();
+        Assert::notNull($order);
         $customer = $order->getCustomer();
+        Assert::notNull($customer);
         $localeCode = $order->getLocaleCode();
+        Assert::notNull($localeCode);
         $billingAddress = $order->getBillingAddress();
-        $notifyToken = $this->createNotifyToken($model, $request->getToken(), $localeCode);
+        Assert::notNull($billingAddress);
+        $notifyToken = $this->createNotifyToken($model, $token, $localeCode);
+        $amount = $model->getAmount();
+        Assert::notNull($amount);
 
         $blikToken = $model->getDetails()['tpay']['blik'];
 
         $response = $this->api->transactions()->createTransaction([
-            'amount' => number_format($model->getAmount() / 100, 2, thousands_separator: ''),
+            'amount' => number_format($amount / 100, 2, thousands_separator: ''),
             'description' => sprintf('zamówienie #%s', $order->getNumber()), // TODO: Introduce translations
             'payer' => [
                 'email' => $customer->getEmail(),
diff --git a/src/Payum/Action/CaptureAction.php b/src/Payum/Action/CaptureAction.php
index ffa37764..6db4fc16 100644
--- a/src/Payum/Action/CaptureAction.php
+++ b/src/Payum/Action/CaptureAction.php
@@ -4,7 +4,6 @@
 
 namespace CommerceWeavers\SyliusTpayPlugin\Payum\Action;
 
-use CommerceWeavers\SyliusTpayPlugin\Payum\Factory\CreateBlik0TransactionFactory;
 use CommerceWeavers\SyliusTpayPlugin\Payum\Factory\CreateTransactionFactoryInterface;
 use Payum\Core\Action\ActionInterface;
 use Payum\Core\GatewayAwareInterface;
@@ -33,7 +32,7 @@ public function execute($request): void
 
         if ($this->transactionIsBlik($model)) {
             $this->gateway->execute(
-                $this->createBlik0TransactionFactory->createNewWithModel($request->getToken())
+                $this->createBlik0TransactionFactory->createNewWithModel($request->getToken()),
             );
 
             return;
@@ -53,10 +52,10 @@ public function supports($request): bool
         return $request instanceof Capture && $request->getModel() instanceof PaymentInterface;
     }
 
-    private function transactionIsBlik($model): bool
+    private function transactionIsBlik(PaymentInterface $model): bool
     {
-        return array_key_exists('tpay', $model->getDetails())
-            && array_key_exists('blik', $model->getDetails()['tpay'])
+        return array_key_exists('tpay', $model->getDetails()) &&
+            array_key_exists('blik', $model->getDetails()['tpay'])
         ;
     }
 }
diff --git a/src/Payum/Request/Api/CreateBlik0Transaction.php b/src/Payum/Request/Api/CreateBlik0Transaction.php
index 0dfcbcb5..49303b4e 100644
--- a/src/Payum/Request/Api/CreateBlik0Transaction.php
+++ b/src/Payum/Request/Api/CreateBlik0Transaction.php
@@ -8,15 +8,9 @@
 
 class CreateBlik0Transaction extends Generic
 {
-    public function __construct (
-        private string $afterUrl,
+    public function __construct(
         mixed $model,
     ) {
         parent::__construct($model);
     }
-
-    public function getAfterUrl(): string
-    {
-        return $this->afterUrl;
-    }
 }