Add request/response parameters to support APM payments e.g. PIX

src/GatewayRequest.php

@@ -775,6 +775,21 @@ static function APPLE_PAY_TOKEN()
         return "APPLEPAYTOKEN";
     }
 
+    static function PAY_TYPE()
+    {
+        return "payType";
+    }
+
+    static function PAY_VALIDITY()
+    {
+        return "payValidity";
+    }
+
+    static function PAY_DESCRIPTION()
+    {
+        return "payDescription";
+    }
+
     static function PAY_TOKEN()
     {
         return "payToken";

src/GatewayResponse.php

@@ -494,6 +494,26 @@ static function MERCHANT_ADVICE_CODE()
         return "merchantAdviceCode";
     }
 
+    static function PAY_TYPE()
+    {
+        return "payType";
+    }
+
+    static function PAY_STATUS()
+    {
+        return "payStatus";
+    }
+
+    static function PAY_CODE()
+    {
+        return "payCode";
+    }
+
+    static function PAY_QR_CODE()
+    {
+        return "payQrCode";
+    }
+
 	static function PAYMENT_LINK_URL() 
 	{ 
 		return "PAYMENT_LINK_URL";