Flutterwave

Log in to your Flutterwave dashboard and open your API or developer settings.
Copy your Secret key.
Add it into the admin panel under Settings > Payments > Processors > Flutterwave > Secret key.
In your Flutterwave dashboard webhook settings, configure the webhook URL from the admin panel and use the same value for Webhook secret hash in both Flutterwave and Settings > Payments > Processors > Flutterwave > Webhook secret hash.
Under Webhook preferences, enable all of these: Receive webhook response in JSON format, Enable webhook retries, Enable v3 webhooks, and Enable resend webhook from the dashboard.