Fix creating signature and redirectUrl

src/Payment.php

@@ -51,17 +51,24 @@ public function setBackToEshopUrl($backToEshopUrl = NULL, $params = [])
 		parent::setBackToEshopUrl($backToEshopUrl);
 	}
 
-	public function getRedirectUrl()
+	public function getArgs()
 	{
-		$queryArgs = $this->getArgs();
-		$queryArgs['signature'] = $this->getSignature();
+		$args = parent::getArgs();
 
-		foreach ($queryArgs as &$arg) {
+		foreach ($args as &$arg) {
 			if (is_float($arg) || is_double($arg)) {
-				$arg = number_format($arg, 2, '.', '');
+				$arg = str_replace(',', '.', (string)$arg);
 			}
 		}
 
+		return $args;
+	}
+
+	public function getRedirectUrl()
+	{
+		$queryArgs = $this->getArgs();
+		$queryArgs['signature'] = $this->getSignature();
+
 		return $this->getMerchantConfig()->gateUrl . '?' . http_build_query($queryArgs);
 	}