diff --git a/Model/Config.php b/Model/Config.php
index d94f289a..bc8b14cb 100644
--- a/Model/Config.php
+++ b/Model/Config.php
@@ -3,6 +3,7 @@
 namespace Rvvup\Payments\Model;
 
 use Magento\Framework\App\Config\ScopeConfigInterface;
+use Magento\Framework\Exception\NoSuchEntityException;
 use Magento\Store\Model\ScopeInterface;
 use Magento\Store\Model\StoreManagerInterface;
 use stdClass;
@@ -60,7 +61,7 @@ public function isActive(string $scopeType = ScopeInterface::SCOPE_STORE): bool
      */
     public function getActiveConfig(string $scopeType = ScopeInterface::SCOPE_STORE): bool
     {
-        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : 'default';
+        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : null;
         return (bool) $this->scopeConfig->getValue(self::RVVUP_CONFIG . self::XML_PATH_ACTIVE, $scopeType, $scopeCode);
     }
 
@@ -72,7 +73,7 @@ public function getActiveConfig(string $scopeType = ScopeInterface::SCOPE_STORE)
      */
     public function getJwtConfig(string $scopeType = ScopeInterface::SCOPE_STORE): ?string
     {
-        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : 'default';
+        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : null;
 
         $value = $this->scopeConfig->getValue(self::RVVUP_CONFIG . self::XML_PATH_JWT, $scopeType, $scopeCode);
 
@@ -145,7 +146,7 @@ public function getAuthToken(string $scopeType = ScopeInterface::SCOPE_STORE): s
      */
     public function isDebugEnabled(string $scopeType = ScopeInterface::SCOPE_STORE): bool
     {
-        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : 'default';
+        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : null;
         return (bool) $this->scopeConfig->getValue(self::RVVUP_CONFIG . self::XML_PATH_DEBUG, $scopeType, $scopeCode);
     }
 
@@ -197,7 +198,7 @@ public function getPayPalBlockConfig(
         string $scopeType = ScopeInterface::SCOPE_STORE
     ): string {
         $config = self::RVVUP_CONFIG . self::XML_PATH_PAYPAL_BLOCK . $config;
-        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : 'default';
+        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : null;
 
         return $this->scopeConfig->getValue($config, $scopeType, $scopeCode);
     }
@@ -205,11 +206,12 @@ public function getPayPalBlockConfig(
     /**
      * @param string $scopeType
      * @return bool
+     * @throws NoSuchEntityException
      */
     public function getValidProductTypes(
         string $scopeType = ScopeInterface::SCOPE_STORE
     ): array {
-        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : 'default';
+        $scopeCode = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : null;
         $path = self::RVVUP_CONFIG . self::PRODUCT_RESTRICTIONS . self::XML_PATH_PRODUCT_TYPES_ENABLED;
         $types = $this->scopeConfig->getValue($path, $scopeType, $scopeCode);
         return explode(',', $types);
diff --git a/Model/ConfigInterface.php b/Model/ConfigInterface.php
index 45760adc..1a0c6fe4 100644
--- a/Model/ConfigInterface.php
+++ b/Model/ConfigInterface.php
@@ -32,7 +32,7 @@ public function isActive(string $scopeType = ScopeInterface::SCOPE_STORE): bool;
     /**
      * Get the active value from the config.
      *
-     * @param string $scopeType     
+     * @param string $scopeType
      * @return bool
      */
     public function getActiveConfig(string $scopeType = ScopeInterface::SCOPE_STORE): bool;
@@ -40,7 +40,7 @@ public function getActiveConfig(string $scopeType = ScopeInterface::SCOPE_STORE)
     /**
      * Get the JWT value from the config.
      *
-     * @param string $scopeType     
+     * @param string $scopeType
      * @return string|null
      */
     public function getJwtConfig(string $scopeType = ScopeInterface::SCOPE_STORE): ?string;
diff --git a/Observer/ConfigSaveObserver.php b/Observer/ConfigSaveObserver.php
index 21834f11..aa16a9c0 100644
--- a/Observer/ConfigSaveObserver.php
+++ b/Observer/ConfigSaveObserver.php
@@ -108,7 +108,7 @@ private function sendApiDataOnMethodDisabled(Event $event): void
         )) {
             return;
         }
-        $scope = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : 'default';
+        $scope = $this->storeManager->getStore() ? $this->storeManager->getStore()->getCode() : null;
 
         // No action if it was activated.
         if ($this->config->getActiveConfig() === true) {
diff --git a/Service/Hash.php b/Service/Hash.php
new file mode 100644
index 00000000..a261ffbc
--- /dev/null
+++ b/Service/Hash.php
@@ -0,0 +1,35 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rvvup\Payments\Service;
+
+use Magento\Quote\Model\Quote;
+
+class Hash
+{
+    public function saveQuoteHash(Quote $quote): void
+    {
+        $payment = $quote->getPayment();
+        $payment->setAdditionalInformation('quote_hash', $this->getHashForData($quote->getData()));
+    }
+
+    public function getHashForData(array $data): string
+    {
+        $hashedValues = [];
+        foreach ($data as $key => $value) {
+            if (is_string($value)) {
+                $hashedValues[$key] = $value;
+            }
+        }
+
+        $output = implode(', ', array_map(
+            function ($v, $k) { return sprintf("%s='%s'", $k, $v); },
+            $hashedValues,
+            array_keys($hashedValues)
+        ));
+
+        return hash('sha256',$output);
+    }
+
+}
diff --git a/Test/Unit/Model/Config.php b/Test/Unit/Model/Config.php
index 7ab89921..d793a1c9 100644
--- a/Test/Unit/Model/Config.php
+++ b/Test/Unit/Model/Config.php
@@ -6,6 +6,7 @@
 
 use Magento\Framework\App\Config\ScopeConfigInterface;
 use Magento\Store\Model\ScopeInterface;
+use Magento\Store\Model\StoreManagerInterface;
 use PHPUnit\Framework\TestCase;
 use Rvvup\Payments\Model\ConfigInterface;
 
@@ -14,6 +15,9 @@ class Config extends TestCase
     /** @var ScopeConfigInterface */
     private $scopeConfigMock;
 
+    /** @var StoreManagerInterface */
+    private $storeManagerMock;
+
     /** @var \Rvvup\Payments\Model\Config */
     private $config;
 
@@ -22,7 +26,11 @@ protected function setUp(): void
         $this->scopeConfigMock = $this->getMockBuilder(ScopeConfigInterface::class)
             ->disableOriginalConstructor()->getMock();
 
-        $this->config = new \Rvvup\Payments\Model\Config($this->scopeConfigMock);
+        $this->storeManagerMock = $this->getMockBuilder(StoreManagerInterface::class)
+            ->disableOriginalConstructor()->getMock();
+        $this->storeManagerMock->method('getStore')->willReturn(null);
+
+        $this->config = new \Rvvup\Payments\Model\Config($this->scopeConfigMock, $this->storeManagerMock);
     }
 
     public function testPaypalBlockDefaultStyling()