I don't know what to choose from the drop-down list (event to send)

Hello sir madam,
I installed the Ninja Invoice billing cms in my server and I added the Stripe API to use it as the payment method offered in my invoices.
My concern is I don’t know what to choose from the drop-down list (event to send) ?!
Please kindly clarify this for me.
cordially

KHADIRI Mouhcine
Phone 0492 220 330

https://github.com/invoiceninja/invoiceninja/blob/master/app/Ninja/PaymentDrivers/StripePaymentDriver.php#L653