I've been searching for this for hours, I hope someone here can help. I built a subscription based site on Laravel and PayPal subscriptions using the PayPal PHP SDK. Everything works perfectly except on thing: I created a webhook for when a user cancels the payment on his end. I'm getting this error:
Got Http response code 400 when accessing https://api.sandbox.paypal.com/v1/notifications/verify-webhook-signature.{"name":"VALIDATION_ERROR","message":"Invalid data provided","debug_id":"7225cebfec35a","information_link":"https://developer.paypal.com/docs/api/webhooks/#errors","details":[{"field":"webhook_id","location":"body","issue":"Required field cannot be blank"}],"links":[]}
Here is my code:
public function webhook()
{
/**
* Receive the entire body that you received from PayPal webhook.
*/
$bodyReceived = file_get_contents('php://input');
// Receive HTTP headers that you received from PayPal webhook.
$headers = getallheaders();
/**
* Uppercase all the headers for consistency
*/
$headers = array_change_key_case($headers, CASE_UPPER);
$signatureVerification = new \PayPal\Api\VerifyWebhookSignature();
$signatureVerification->setWebhookId(env('PAYPAL_WEBHOOK_ID'));
$signatureVerification->setAuthAlgo($headers['PAYPAL-AUTH-ALGO']);
$signatureVerification->setTransmissionId($headers['PAYPAL-TRANSMISSION-ID']);
$signatureVerification->setCertUrl($headers['PAYPAL-CERT-URL']);
$signatureVerification->setTransmissionSig($headers['PAYPAL-TRANSMISSION-SIG']);
$signatureVerification->setTransmissionTime($headers['PAYPAL-TRANSMISSION-TIME']);
$webhookEvent = new \PayPal\Api\WebhookEvent();
$webhookEvent->fromJson($bodyReceived);
$signatureVerification->setWebhookEvent($webhookEvent);
$request = clone $signatureVerification;
try {
$output = $signatureVerification->post($this->apiContext);
} catch(\Exception $ex) {
//This is where it fails
print_r($ex->getMessage());
exit(1);
}
$verificationStatus = $output->getVerificationStatus();
$responseArray = json_decode($request->toJSON(), true);
$event = $responseArray['webhook_event']['event_type'];
if ($verificationStatus == 'SUCCESS')
{
switch($event)
{
case 'BILLING.SUBSCRIPTION.CANCELLED':
case 'BILLING.SUBSCRIPTION.SUSPENDED':
case 'BILLING.SUBSCRIPTION.EXPIRED':
case 'BILLING_AGREEMENTS.AGREEMENT.CANCELLED':
// $user = User::where('payer_id',$responseArray['webhook_event']['resource']['payer']['payer_info']['payer_id'])->first();
$this->updateStatus($responseArray['webhook_event']['resource']['payer']['payer_info']['payer_id'], 0,1);
break;
}
}
echo $verificationStatus;
exit(0);
}
And here is the $this->apiContext:
trait PayPalApiCredentialsTrait {
private $apiContext;
public function setCredentials()
{
$this->apiContext = new \PayPal\Rest\ApiContext(
new \PayPal\Auth\OAuthTokenCredential(
env('PAYPAL_CLIENT_ID'), // ClientID
env('PAYPAL_CLIENT_SECRET') // ClientSecret
)
);
$this->apiContext->setConfig(
array(
'mode' => env("PAYPAL_MODE"),
'log.LogEnabled' => true,
'log.FileName' => '../PayPal.log',
'log.LogLevel' => 'INFO', // PLEASE USE `INFO` LEVEL FOR LOGGING IN LIVE ENVIRONMENTS
)
);
}
}
This is the error I get from the paypal.log:
[01-09-2020 15:54:18] PayPal\Core\PayPalHttpConnection : INFO: POST https://api.sandbox.paypal.com/v1/oauth2/token
[01-09-2020 15:54:18] PayPal\Core\PayPalHttpConnection : INFO: Response Status : 200
[01-09-2020 15:54:18] PayPal\Core\PayPalHttpConnection : INFO: POST https://api.sandbox.paypal.com/v1/notifications/verify-webhook-signature
[01-09-2020 15:54:19] PayPal\Core\PayPalHttpConnection : INFO: Response Status : 400
[01-09-2020 15:54:19] PayPal\Core\PayPalHttpConnection : ERROR: Got Http response code 400 when accessing https://api.sandbox.paypal.com/v1/notifications/verify-webhook-signature. {"name":"VALIDATION_ERROR","message":"Invalid data provided","debug_id":"26b12ee43cddd","information_link":"https://developer.paypal.com/docs/api/webhooks/#errors","details":[{"field":"webhook_id","location":"body","issue":"Required field cannot be blank"}],"links":[]}
I must mention that everything else works fine. Creating plans, agreements, cancelling the both, showing active plans, and more... Everything works smoothly. This is the only thing that I can't seem to fix. If anyone could figure this out for me, I'd really appreciate it. Thank you!
