Active an extension based on condition in magento 2

Question

Hi i have 2 payment method available in my magento2 store . One is cash on delivery and other is custom payment gateway . I install custom payment gateway extension and it i

Answer 1

Don't hesitate to create your own module in app/code/YourNamespace.

Basically you just need a registration.php file and an etc/module.xml:

https://devdocs.magento.com/videos/fundamentals/create-a-new-module/

---

Also see the following example showing how to declare the Observer for this event:

https://magento.stackexchange.com/a/188367/27460