Add request body for VerifyWebhookSignature

- Fixes #798

lib/PayPal/Api/VerifyWebhookSignature.php

@@ -166,7 +166,7 @@ class VerifyWebhookSignature extends PayPalResourceModel
 
     /**
      * The webhook notification, which is the content of the HTTP `POST` request body.
-     *
+     * @deprecated Please use setRequestBody($request_body) instead.
      * @param \PayPal\Api\WebhookEvent $webhook_event
      *
      * @return $this
@@ -187,6 +187,29 @@ class VerifyWebhookSignature extends PayPalResourceModel
         return $this->webhook_event;
     }
 
+    /**
+     * The content of the HTTP `POST` request body of the webhook notification you received as a string.
+     *
+     * @param string $request_body
+     *
+     * @return $this
+     */
+    public function setRequestBody($request_body)
+    {
+        $this->request_body = $request_body;
+        return $this;
+    }
+
+    /**
+     * The content of the HTTP `POST` request body of the webhook notification you received as a string.
+     *
+     * @return string
+     */
+    public function getRequestBody()
+    {
+        return $this->request_body;
+    }
+
     /**
      * Verifies a webhook signature.
      *
@@ -197,6 +220,7 @@ class VerifyWebhookSignature extends PayPalResourceModel
     public function post($apiContext = null, $restCall = null)
     {
         $payLoad = $this->toJSON();
+
         $json = self::executeCall(
             "/v1/notifications/verify-webhook-signature",
             "POST",
@@ -210,4 +234,23 @@ class VerifyWebhookSignature extends PayPalResourceModel
         return $ret;
     }
 
+    public function toJSON($options = 0)
+    {
+        if (!is_null($this->request_body)) {
+            $valuesToEncode = $this->toArray();
+            unset($valuesToEncode['webhook_event']);
+            unset($valuesToEncode['request_body']);
+
+            $payLoad = "{";
+            foreach ($valuesToEncode as $field => $value) {
+                $payLoad .= "\"$field\": \"$value\",";
+            }
+            $payLoad .= "\"webhook_event\": $this->request_body";
+            $payLoad .= "}";
+            return $payLoad;
+        } else {
+            $payLoad = parent::toJSON($options);
+            return $payLoad;
+        }
+    }
 }

sample/notifications/ValidateWebhookEvent.php

@@ -57,9 +57,7 @@ $signatureVerification->setWebhookId("9XL90610J3647323C"); // Note that the Webh
 $signatureVerification->setTransmissionSig($headers['PAYPAL-TRANSMISSION-SIG']);
 $signatureVerification->setTransmissionTime($headers['PAYPAL-TRANSMISSION-TIME']);
 
-$webhookEvent = new WebhookEvent();
-$webhookEvent->fromJson($requestBody);
-$signatureVerification->setWebhookEvent($webhookEvent);
+$signatureVerification->setRequestBody($requestBody);
 $request = clone $signatureVerification;
 
 try {