A Product per plan family and a Price per priced row of a published version,
plus the four subscribed webhook events that were arriving and being ignored.
`stripe:sync-catalogue` mirrors the catalogue. Idempotent twice over: a stored
id is skipped, and each call carries an idempotency key derived from our own
row, so a crash between Stripe creating a Price and us recording its id gives
back the same object rather than a second one. That matters more here than
usual — a Stripe Price cannot be edited or deleted, so a duplicate is
permanent. Drafts are not synced at all: a version that has promised nothing
has no business in a price list. --dry-run shows what would be created.
The webhook now handles invoice.paid, invoice.payment_failed,
customer.subscription.updated and customer.subscription.deleted. It never
re-derives an amount: the invoice is the authority for what was charged, and
recomputing it from our catalogue would produce a second, disagreeing answer.
A failed payment is recorded and nothing else — Stripe runs the dunning
schedule, and cutting a customer off on the first failure would punish an
expired card as though it were a refusal to pay.
Only a cycle renewal moves the term on. Stripe also sends paid invoices for
prorations and manual charges, and the checkout's own invoice — which is
already in the register as the purchase, and would otherwise double every
customer's first payment.
Stripe does not guarantee delivery order, which is the source of most of the
care here:
- state changes are judged and written in one transaction with the row held,
so two deliveries cannot both pass a check made on a stale copy;
- an older event never overwrites a newer one, with a rank breaking ties
between events sharing a second — their timestamps have one-second
resolution, and a failed attempt and its successful retry routinely do;
- a term is never shortened, and an ended contract is never revived;
- an event for a contract that does not exist yet is HELD and replayed the
moment it appears, rather than acknowledged and forgotten. A cancellation
dropped that way would leave us serving someone who had already left. Held
rows that never match are pruned after a week.
Register entries are keyed by what they are about — the invoice, the attempt,
the subscription — with a unique index doing the work, because a check two
concurrent deliveries can both pass is not idempotency.
PlanChange is now documented as the preview shown before someone confirms, not
the invoice: Stripe's proration accounts for tax, existing credit and the exact
second the change lands, and ours cannot.
Not run against the live account — `stripe:sync-catalogue` creates objects that
cannot be deleted, so that is the owner's call. The dry run lists 12.
457 tests green. Codex review clean after seven rounds.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Two things the contract could not answer on its own: what happened, and what
the customer's whole bill is.
`subscription_records` is append-only, one row per commercial event. Flat
columns for everything searched or relied on as evidence — event, customer,
subscription, plan family and version, term, net/tax/gross, currency, tax rate,
reverse charge, Stripe ids — PLUS a versioned JSON copy of the whole snapshot.
Not JSON alone: you cannot query it, and "the amount is in there somewhere" is
poor evidence. Copied, not joined, so a row still answers after the customer,
the plan or the version have gone.
The flat columns describe the TRANSACTION. Gross is what was actually taken;
net and tax are that gross split by the rate that applied on the day. A
discount lowers the taxable amount rather than creating negative VAT, and a
free checkout is recorded as free instead of as paid in full. What was agreed
sits beside it in the snapshot, so a charge that differs from the catalogue is
preserved as a question rather than reconciled away.
The register refuses to be rewritten, in bulk as well as one row at a time —
model events do not fire for `query()->update()`, which is exactly the shape a
careless data fix takes.
`subscription_addons` carries the owner's rule: a customer's total is their
subscription plus their modules, and all of it is frozen at what was agreed.
Price protection covering only the plan would let a module quietly double for
someone who booked it two years ago. A module they have NOT booked is a sale
still to be made, at today's price — so the catalogue is consulted only for
what is not in this table. Several bookings of one module are summed rather
than reduced to one arbitrary row, or the page and the bill would disagree.
Concurrency: one order books one module, enforced by a unique index rather than
a lookup two retries can both pass; cancellation is an atomic claim; and each
booking commits with its own register entry, so a failure cannot leave a sale
without evidence and a retry that finds the booking cannot skip the event.
Verified in the browser: with the module raised from 29,00 € to 59,00 € in the
catalogue, the customer who booked it still sees 29,00 € and a total of
208,00 €, while a new customer is quoted 59,00 €.
436 tests green. Codex review clean after seven rounds.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
nexxo