How to create a vendor event listener in Laravel?

Question

Laravel

I use this component:
https://github.com/pdazcom/laravel-walletone
The installation documentation says:
To process requests of WalletOne payment notifications just create listeners of two events: Pdazcom\LaravelWalletOne\Events\FailedPayment and Pdazcom\LaravelWalletOne\Events \SuccessPayment See
Laravel 5.4 documentation. there are examples of creating your own events and listeners. But I did not understand how to create listeners for "alien" events. Please tell me step by step.