diff --git a/src/Drivers/Novin/Novin.php b/src/Drivers/Novin/Novin.php
index 4d3b622..d4626f9 100644
--- a/src/Drivers/Novin/Novin.php
+++ b/src/Drivers/Novin/Novin.php
@@ -14,20 +14,23 @@
 
 class Novin extends Driver
 {
-    const BANK_BUY_TRANSACTION_TYPE = 'EN_GOODS';
+    protected const BANK_BUY_TRANSACTION_TYPE = 'EN_GOODS';
 
     private ?string $sessionId = null;
 
     public function purchase(): string
     {
         $response = $this->callApi($this->getLoginUrl(), $this->getLoginData());
+
         if ($response['Result'] == $this->getSuccessResponseStatusCode()) {
             $this->sessionId = $response['SessionId'];
         } else {
             throw new PurchaseFailedException($this->getStatusMessage($response['Result']));
         }
+
         $purchaseData = $this->getPurchaseData();
         $response = $this->callApi($this->getPurchaseUrl(), $purchaseData);
+
         if ($response['Result'] == $this->getSuccessResponseStatusCode()) {
             $dataToSign = $response['DataToSign'];
             $dataUniqueId = $response['UniqueId'];
@@ -55,24 +58,29 @@ public function pay(): RedirectionForm
             'Token' => $this->getInvoice()->getToken(),
             'Language' => $this->getLanguage()
         ];
-        $payUrl .= ('?token=' . $data['Token'] . '&language=' . $data['Language']);
+        $payUrl .= ('?token='.$data['Token'].'&language='.$data['Language']);
 
         return $this->redirect($payUrl, $data);
     }
 
     public function verify(): Receipt
     {
-        if (!empty(request('State')) and strtoupper(request('State')) !== 'OK') {
+        if (!empty(request('State')) && strtoupper(request('State')) !== 'OK') {
             throw new PaymentFailedException('کاربر از انجام تراکنش منصرف شده است.');
         }
 
         $verificationData = $this->getVerificationData();
         $response = $this->callApi($this->getVerificationUrl(), $verificationData);
-        if ($response['Result'] == $this->getSuccessResponseStatusCode() and $response['Amount'] == $this->getInvoice()->getAmount()) {
+        if ($response['Result'] == $this->getSuccessResponseStatusCode() && $response['Amount'] == $this->getInvoice()->getAmount()) {
             $this->getInvoice()->setTransactionId(request('RefNum'));
             $this->getInvoice()->setInvoiceId(request('ResNum'));
 
-            return new Receipt($this->getInvoice(), request('TraceNo'), request('CustomerRefNum'), request('CardMaskPan'));
+            return new Receipt(
+                $this->getInvoice(),
+                request('TraceNo'),
+                request('CustomerRefNum'),
+                request('CardMaskPan')
+            );
         }
         throw new PaymentFailedException($this->getStatusMessage($response['Result']));
     }
@@ -90,8 +98,8 @@ private function getSignature(string $dataToSign): string
         openssl_pkcs7_sign(
             $this->getUnsignedDataFilePath(),
             $this->getSignedDataFilePath(),
-            'file://' . $this->settings['certificate_path'],
-            array('file://' . $this->settings['certificate_path'], $this->settings['certificate_password']),
+            'file://'.$this->settings['certificate_path'],
+            array('file://'.$this->settings['certificate_path'], $this->settings['certificate_password']),
             array(),
             PKCS7_NOSIGS
         );
@@ -221,17 +229,17 @@ protected function getSuccessResponseStatusCode(): string
 
     protected function getLoginUrl(): string
     {
-        return $this->getBaseRestServiceUrl() . 'merchantLogin/';
+        return $this->getBaseRestServiceUrl().'merchantLogin/';
     }
 
     protected function getPurchaseUrl(): string
     {
-        return $this->getBaseRestServiceUrl() . 'generateTransactionDataToSign/';
+        return $this->getBaseRestServiceUrl().'generateTransactionDataToSign/';
     }
 
     protected function getTokenGenerationUrl(): string
     {
-        return $this->getBaseRestServiceUrl() . 'generateSignedDataToken/';
+        return $this->getBaseRestServiceUrl().'generateSignedDataToken/';
     }
 
     protected function getPaymentUrl(): string
@@ -241,7 +249,7 @@ protected function getPaymentUrl(): string
 
     protected function getVerificationUrl(): string
     {
-        return $this->getBaseRestServiceUrl() . 'verifyMerchantTrans/';
+        return $this->getBaseRestServiceUrl().'verifyMerchantTrans/';
     }
 
     private function getBaseRestServiceUrl(): string
@@ -264,11 +272,11 @@ private function getLanguage(): string
 
     private function checkPhoneNumberFormat(string $phoneNumber): string
     {
-        if (strlen($phoneNumber) == 12 and Str::startsWith($phoneNumber, '98')) {
+        if (strlen($phoneNumber) === 12 && Str::startsWith($phoneNumber, '98')) {
             return Str::replaceFirst('98', '0', $phoneNumber);
         }
-        if (strlen($phoneNumber) == 10 and Str::startsWith($phoneNumber, '9')) {
-            return '0' . $phoneNumber;
+        if (strlen($phoneNumber) === 10 && Str::startsWith($phoneNumber, '9')) {
+            return '0'.$phoneNumber;
         }
 
         return $phoneNumber;
@@ -276,11 +284,11 @@ private function checkPhoneNumberFormat(string $phoneNumber): string
 
     private function getUnsignedDataFilePath(): string
     {
-        return $this->settings['temp_files_dir'] . 'unsigned.txt';
+        return $this->settings['temp_files_dir'].'unsigned.txt';
     }
 
     private function getSignedDataFilePath(): string
     {
-        return $this->settings['temp_files_dir'] . 'signed.txt';
+        return $this->settings['temp_files_dir'].'signed.txt';
     }
 }
diff --git a/src/Drivers/Pasargad/Helpers/RSA.php b/src/Drivers/Pasargad/Helpers/RSA.php
index 8c5c2bd..1e42a2a 100644
--- a/src/Drivers/Pasargad/Helpers/RSA.php
+++ b/src/Drivers/Pasargad/Helpers/RSA.php
@@ -8,41 +8,41 @@ class RSA
 
     public static function rsaEncrypt($message, $publicKey, $modulus, $keylength)
     {
-        $padded = RSA::addPKCS1Padding($message, true, $keylength / 8);
-        $number = RSA::binaryToNumber($padded);
-        $encrypted = RSA::powMod($number, $publicKey, $modulus);
-        $result = RSA::numberToBinary($encrypted, $keylength / 8);
-        return $result;
+        $padded = self::addPKCS1Padding($message, true, $keylength / 8);
+        $number = self::binaryToNumber($padded);
+        $encrypted = self::powMod($number, $publicKey, $modulus);
+
+        return self::numberToBinary($encrypted, $keylength / 8);
     }
 
     public static function rsaDecrypt($message, $privateKey, $modulus, $keylength)
     {
-        $number = RSA::binaryToNumber($message);
-        $decrypted = RSA::powMod($number, $privateKey, $modulus);
-        $result = RSA::numberToBinary($decrypted, $keylength / 8);
-        return RSA::removePKCS1Padding($result, $keylength / 8);
+        $number = self::binaryToNumber($message);
+        $decrypted = self::powMod($number, $privateKey, $modulus);
+        $result = self::numberToBinary($decrypted, $keylength / 8);
+        return self::removePKCS1Padding($result, $keylength / 8);
     }
 
     public static function rsaSign($message, $privateKey, $modulus, $keylength)
     {
-        $padded = RSA::addPKCS1Padding($message, false, $keylength / 8);
-        $number = RSA::binaryToNumber($padded);
-        $signed = RSA::powMod($number, $privateKey, $modulus);
-        $result = RSA::numberToBinary($signed, $keylength / 8);
-        return $result;
+        $padded = self::addPKCS1Padding($message, false, $keylength / 8);
+        $number = self::binaryToNumber($padded);
+        $signed = self::powMod($number, $privateKey, $modulus);
+
+        return self::numberToBinary($signed, $keylength / 8);
     }
 
     public static function rsaVerify($message, $publicKey, $modulus, $keylength)
     {
-        return RSA::rsaDecrypt($message, $publicKey, $modulus, $keylength);
+        return self::rsaDecrypt($message, $publicKey, $modulus, $keylength);
     }
 
     public static function rsaKypVerify($message, $publicKey, $modulus, $keylength)
     {
-        $number = RSA::binaryToNumber($message);
-        $decrypted = RSA::powMod($number, $publicKey, $modulus);
-        $result = RSA::numberToBinary($decrypted, $keylength / 8);
-        return RSA::removeKYPPadding($result, $keylength / 8);
+        $number = self::binaryToNumber($message);
+        $decrypted = self::powMod($number, $publicKey, $modulus);
+        $result = self::numberToBinary($decrypted, $keylength / 8);
+        return self::removeKYPPadding($result, $keylength / 8);
     }
 
     public static function powMod($p, $q, $r)
@@ -54,7 +54,7 @@ public static function powMod($p, $q, $r)
             $rem = bcmod($div, 2);
             $div = bcdiv($div, 2);
             if ($rem) {
-                array_push($factors, $powerOfTwo);
+                $factors[] = $powerOfTwo;
             }
             $powerOfTwo++;
         }
@@ -67,13 +67,14 @@ public static function powMod($p, $q, $r)
                 $partRes = bcmod($partRes, $r);
                 $idx++;
             }
-            array_push($partialResults, $partRes);
+            $partialResults[] = $partRes;
         }
         $result = "1";
         foreach ($partialResults as $partRes) {
             $result = bcmul($result, $partRes);
             $result = bcmod($result, $r);
         }
+
         return $result;
     }
 
diff --git a/src/Drivers/Pasargad/Helpers/RSAProcessor.php b/src/Drivers/Pasargad/Helpers/RSAProcessor.php
index 0aa42d5..bbf3018 100644
--- a/src/Drivers/Pasargad/Helpers/RSAProcessor.php
+++ b/src/Drivers/Pasargad/Helpers/RSAProcessor.php
@@ -7,10 +7,10 @@ class RSAProcessor
     public const KEY_TYPE_XML_FILE = 'xml_file';
     public const KEY_TYPE_XML_STRING = 'xml_string';
 
-    private $publicKey = null;
-    private $privateKey = null;
-    private $modulus = null;
-    private $keyLength = "1024";
+    private $publicKey;
+    private $privateKey;
+    private $modulus;
+    private $keyLength;
 
     public function __construct($key, $keyType = null)
     {
@@ -20,7 +20,7 @@ public function __construct($key, $keyType = null)
         if ($keyType == null || $keyType == self::KEY_TYPE_XML_STRING) {
             $xmlObject = simplexml_load_string($key);
         } elseif ($keyType == self::KEY_TYPE_XML_FILE) {
-            $xmlObject = simplexml_load_file($key);
+            $xmlObject = simplexml_load_string(file_get_contents($key));
         }
 
         $this->modulus = RSA::binaryToNumber(base64_decode($xmlObject->Modulus));