Pay by deposit and installments
What It Does
An offered plan quotes deposit and future charges on the cart and is quoted again for placement. Deposit payment accepts the sale; the Accounting schedule then supplies later invoices and payment tracking.
The Flow
When Something Fails
Schedule creation can be deferred without reversing acceptance and is retried by a schedule read or mirror pass. Cancellation reduction failures only reach history and logs, so future charges can remain too high. The vaulted-method charge depends on unfinished Accounting support.
Open Design Questions
Future schedule ownership is proposed for Billing. Reads that create schedules or invoice links need a decision about permission and recovery boundaries.