Two findings from reviewing all five phases together rather than one at a time.
The webhook held every event a handler answered `null` to — but `null` also
means "already recorded" and "deliberately skipped", which is every checkout's
own invoice and every redelivered renewal. Their contract is right there, so
`replayHeldFor()` could never come back for them, and ordinary Stripe traffic
silted up the holding area until the weekly prune. It now holds only what it
genuinely cannot match — and if the contract appeared in the meantime, applies
the event instead of dropping it: the creation race is narrow, but losing a
cancellation to it would leave us serving someone who had left.
Also fixes a rollback that predates this work and blocks `migrate:fresh` on
MariaDB entirely: dropping the unique index on customers.user_id fails while
the foreign key added one migration earlier still depends on it. Verified by
building all 33 migrations from nothing on MariaDB, rolling every one of them
back, and building them again.
458 tests green. Codex clean on the full branch diff.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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>
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