John Davidson

Message:

Trying to initialize Stripe and create an event object in Wordpress. Upon receipt of a webhook callback, Stripe fails to verify the response and returns the error, No signatures found matching the expected signature for payload.

$webhookSecret = defined('STRIPE_WEBHOOK_SECRET') ? STRIPE_WEBHOOK_SECRET : false;

try {

    $event = \Stripe\Webhook::constructEvent(

        $request->get_body(),

        $request->get_header('stripe-signature'),

        $webhookSecret

    );

    error_log("initialized stripe event object");

} catch (\Exception $e) {

    error_log("failed to initialize stripe event object");

    error_log($e->getMessage());

    return new WP_Error(403, 'error', __('message', $e->getMessage()));

}

---

My Answer:
It seems like the issue might be related to the webhook signature not matching the expected signature. Here are a few things you can check and try to resolve the issue:

1. Verify that the `STRIPE_WEBHOOK_SECRET` constant is defined correctly in your Wordpress configuration. Make sure it matches the webhook secret provided by Stripe.

2. Double-check the webhook endpoint URL in your Stripe account settings to ensure it matches the URL where your Wordpress site is hosted.

3. Check if the request body and signature are being passed correctly to the `constructEvent` method. You can log these values to ensure they are correct.

4. Make sure that the webhook endpoint is set up to receive POST requests and that the request method is set to POST in your Wordpress code.

5. If you are using any security plugins or firewalls on your server, make sure they are not blocking the webhook requests from Stripe.

By verifying these points and making any necessary adjustments, you should be able to resolve the issue and successfully initialize the Stripe event object in Wordpress.