stripe-php after chat

            public function webHookReceiver ($request, $response, $args)
    {
        $config = $this->ci->config;

        $data = $request->getParsedBody();

        Stripe::setApiKey($config['stripe.secret_key']);


        // You can find your endpoint's secret in your webhook settings
        $endpoint_secret = $config['stripe.webhook_key'];

        $payload = $request->getBody();

        $sig_header = $request->getHeaderLine('Stripe-Signature');
        $data = json_decode($payload, true);
        $jsonError = json_last_error();
        if ($data === null && $jsonError !== JSON_ERROR_NONE) {
            $msg = "Invalid payload: $payload "
              . "(json_last_error() was $jsonError)";
            throw new \UnexpectedValueException($msg);
        }
        $event = Event::constructFrom($data);

        WebhookSignature::verifyHeader($payload, $sig_header, $endpoint_secret, 300);
}