Storeware Docs
Event reference

Checkout events

Topics named checkout.*, when each is sent, and the permissions that receive it.

TopicSent whenNeeds one of
checkout.started.v1a shopper reaches the details steporders:read
checkout.updated.v1a basket changesorders:read
checkout.expired.v1a basket is abandonedorders:read
checkout.canceled.v1a shopper cancels their basketorders:read

What a payload carries, and how delivery is retried: Payloads and delivery.