Stripe sends zero-decimal currencies (JPY/KRW/VND/...) already in the
major unit; the unconditional /100 recorded a JPY dues charge 100x
understated in the ledger + receipt. minorToMajor is now currency-aware
(shared ZERO_DECIMAL_CURRENCIES/isZeroDecimalCurrency in
notifications-logic); formatMoney renders no fractional part for those.
Never fires for USD; closes silent ledger corruption for such tenants.
Tests added; suite 526+.
Stripe doesn't guarantee event order. A late customer.subscription.
updated carrying an older period overwrote a newer current_period_end,
so graceExceeded flipped a paid member to 'late' and fired a false
'dues lapsed' email + access loss. applySubscription now reads the
stored period and keeps the later of stored vs incoming
(laterPeriodEnd, pure + tested); status still tracks latest sub.status
but grace is computed from the monotonic period.
The webhook's money/status mapping (Basil field relocations, period
extraction, customer-id unwrap, status patch, invoice->payment row,
minor->major) lived inline in the route with zero test coverage - the
biggest untested critical path in the codebase. Extracted to a pure,
SDK-free lib/stripe/webhook-logic.ts (structural input types) and
refactored the route to only do signature verify + network + DB writes.
12 new tests cover the Basil edges and link/unlink + defaults. Behavior
unchanged; suite 514.
Independent audit verdict was NOT SAFE; all findings fixed:
- dispatcher Idempotency-Key is now per-attempt (${id}:${attempts}),
not row id alone, so a transient-failure response cached by Resend
cannot permanently suppress every retry and silently lose an email.
- enqueueDues is fully try/catch wrapped so a notifications-table or
render failure can never throw into / wedge the Stripe money path.
- dues_lapsed dedupe falls back to the subscription id when periodEnd
is null (canceled/deleted subs), so future lapses no longer collapse
to one key and get suppressed. New test; suite 499.
- documented the dispatcher's once/min concurrency assumption.
invoice.paid -> dues_renewed; invoice.payment_failed -> dues_payment_
failed; transition to late (applySubscription) -> dues_lapsed. The
webhook only writes the outbox row (ignoreDuplicates on the
(space_id,dedupe_key) unique index) so a Stripe event replay is a no-op
and the money path stays send-free, fast, and retry-safe. Recipient +
space name resolved server-side; manage link from the request host.
proxy.ts auth-gates every non-public path and 307-redirects to /login.
The Stripe webhook is called without a session, so it was being
redirected; Stripe does not follow redirects, so every webhook delivery
would have failed. Add /api/stripe/webhook to PUBLIC_ROUTES (scoped to
the webhook path only) and correct the route/header comments that wrongly
claimed there was no auth middleware. Caught by smoke-testing the
deployed route (POST returned 307 instead of 400).
Independent audit (verified vs Stripe Basil 2025-03-31 changelog):
- P0: period end moved off the top-level Subscription -> read
sub.items.data[0].current_period_end (grace/lapse now actually fires;
was always null -> past_due members never went 'late').
- P0: invoice subscription metadata moved under invoice.parent.
subscription_details -> read parent (metadata member-resolution was
always failing, mislinking dues payments).
- P1: handle only invoice.paid (not also invoice.payment_succeeded) +
pre-insert dedupe on (space_id,platform,external_id) -> no double
payment-ledger rows.
- P2: idempotencyKey on customers.create -> no duplicate Stripe
customers under concurrent checkout.
- 040: documented the 'do not wrap in manual BEGIN/COMMIT' caveat.
(P0 webhook-reprocess-on-failure was fixed in ca34e53.) Audit verdict:
isolation/secrets/RLS/status-bounds were already sound.
Self-audit finding: the idempotency row is written before processing,
so a handler exception/500 followed by Stripe's retry would be
suppressed as a duplicate and the event silently dropped. On the error
path, delete the dedupe row so the retry reprocesses. (Bad-signature/
config 400s and the non-unique insert-error 500 never wrote the row, so
those were already clean.)
app/api/stripe/webhook/[space]/route.ts (nodejs, force-dynamic). Raw
req.text() body; loads THIS space's secret + signing secret from the
vault; constructEvent verifies signature; idempotency via the
stripe_webhook_events PK (replay -> 200). Handles checkout.session.
completed / customer.subscription.* / invoice.paid|payment_succeeded:
upserts member_billing, records a stripe payments row, and maps status
via duesMemberStatus+graceExceeded onto space_members (only current<->
late, never resurrect inactive / auto-approve unverified; last_paid_at
on paid). Member resolved by metadata then customer-id, always
space-scoped. Bad sig/config -> 400; handler error -> 500 (Stripe
retries, idempotency-safe).
Moheeb Zara