feat(billing): multi-user paywall: multi_user capability, 20-day grace, owner-only dormancy (#2099)

* feat(billing): multi-user seat gate: multi_user capability, 20-day grace, owner-only dormancy

Multiple people in one company becomes a paid capability (multi_user, the
eighth PAID key). Derived at access time from capability_grants, no status
column, no enforcement cron:

- entitled: active grant (trial/stripe/team/manual/comp), everyone works
- grace: newest grant expired < 20 days ago; countdown banner for everyone
  in companies with > 1 user; invites still allowed
- frozen: only role=owner resolves; other memberships go dormant (rows
  untouched, paying reactivates instantly); invites 403 with paid-plan upsell

Enforcement: new resolve_active_company_gated RPC (zero-arg RPC and RLS twin
untouched: they also run on self-hosts, where the gate never bites), gated
query fallback for service-role/API-key paths, setActiveCompany guard, MCP
company-access check, invite route. Middleware routes all-frozen users to a
new /paused page; the switcher greys locked companies.

Migration 20260901081417 (applied to staging): trial trigger seeds
multi_user, backfills for mid-trial companies, active Stripe subs, team
agreements, and a grandfather grant (expires now, i.e. grace = deploy + 20
days) for existing unpaid multi-member companies. Daily cron mails owners at
grace start and last day. Strings in sv+en; pg-real + unit tests included.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L4tNt8wRG3a5iuU1JE2pnP

* fix(billing): multi-user seat gate hardening from skeptic review

- Stripe cancel now EXPIRES the multi_user stripe grant instead of deleting
  it: the 20-day grace window hangs on an expired row, so a deleted one
  froze churned payers' staff instantly with no banner and no mail. Other
  stripe grants keep the freeze-and-retain delete.
- New SECURITY DEFINER company_multi_user_state() RPC (migration
  20260901083726, applied to staging) and RPC-first getMultiUserState:
  capability_grants RLS hides team-scoped rows from non-team users, so
  user-client reads misread byra-covered companies as frozen (switch
  refusal, wrong switcher locks).
- Byra-kind teams get a standing team-scoped multi_user grant (backfill +
  teams trigger): byra client companies have no company-scoped trial by
  design, so a grantless byra team would freeze every consultant and
  client user.
- Comped/manual companies with active PAID-key grants extend to multi_user
  (a comped company must not read as paying while locking out user two).
- /api/v1 gets the same dormancy gate as MCP (frozen non-owner -> 403).
- PGRST202 on resolution fails OPEN (pre-migration DB has zero multi_user
  rows; the gated fallback would have frozen every non-owner mid-deploy).
- Grace cron: covers team-scoped lapses (byra agreement ending) and skips
  the start mail for the hand-mailed grandfather cohort.
- Tests updated/added across all touched surfaces; pg tests for the new
  RPC and byra trigger; trial-suppression pg test extended to 8 keys.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L4tNt8wRG3a5iuU1JE2pnP

* fix(billing): decouple seat-gate env check and fail open on gate read throws

CI round 1 on #2099:
- isMultiUserEnforced no longer imports has-capability: several route test
  suites partially mock that module and the vitest mock guard threw from
  inside the v1 seat gate, turning expected 4xx responses into 500s.
  multi_user is never a connector capability, so the bypass reduces to the
  same env reads, now inlined.
- getMultiUserState wraps its resolution in a fail-open try/catch: a client
  without .rpc or a thrown network error must never lock users out.
- no-phantom-columns ceiling 391 -> 393 with reasons: the seat gate's .or()
  scope filter (server-resolved UUIDs) and the Stripe cancel expiry update's
  timestamp .or(); all columns in both strings are literals.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L4tNt8wRG3a5iuU1JE2pnP

* fix(billing): membership-guard the multi-user entitlement RPCs (Superagent P3)

company_multi_user_ok and company_multi_user_state are SECURITY DEFINER and
were granted to authenticated with a caller-supplied company UUID: any
logged-in user could probe an arbitrary company's billing state and grace
deadline across tenants. Migration 20260901091752 (applied to staging)
requires an auth.uid() membership in the target company when a JWT is
present, keeps service-role/definer contexts unrestricted, and clamps the
grace window to [0, 20] days. pg tests: stranger gets false/NULL, member
reads normally, oversized p_grace_days cannot widen the probe.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L4tNt8wRG3a5iuU1JE2pnP

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Mattsson
2026-09-01 11:29:12 +02:00
committed by GitHub
co-authored by Claude Fable 5
parent ca12b1855e
commit aabddb592f
44 changed files with 2573 additions and 49 deletions
@@ -0,0 +1,246 @@
-- Multi-user paywall: the `multi_user` capability (founder decision 2026-09-01).
--
-- Multiple people working in one company becomes a PAID capability. The rule
-- (lib/entitlements/multi-user-state.ts is the TS twin; keep them aligned):
--
-- entitled : an active multi_user grant (trial/stripe/team/manual/comp).
-- grace : the newest grant expired less than p_grace_days (20) ago.
-- Everyone still works; the app shows a countdown banner.
-- frozen : lapsed >= 20 days ago (or never granted). Only role = 'owner'
-- memberships resolve; every other membership is dormant. Rows
-- are NEVER deleted: paying reactivates everyone instantly.
--
-- Enforcement is derived at resolution time (no status column, no cron):
-- resolve_active_company_gated() below is the gated twin of
-- resolve_active_company() (20260723161000). The zero-arg function and
-- current_active_company_id() are deliberately UNTOUCHED:
-- - they also run on self-hosted instances, where the seat gate must never
-- bite (multi_user is a local capability there; the app only calls the
-- gated function when lib/entitlements isMultiUserEnforced() is true);
-- - current_active_company_id() (RLS side) converges via the middleware
-- write-back: when the preference points at a frozen company the gated
-- function reports used_fallback = true, middleware persists the
-- accessible company to user_preferences, and RLS follows. During the
-- one-request window before the write-back the app never serves the
-- frozen company anyway (resolution is the only source of companyId).
--
-- Also in this migration:
-- - seed_trial_capability_grants() learns the eighth key ('multi_user').
-- - Backfills so existing companies land in the right state at deploy:
-- mid-trial -> trial grant, active Stripe subs -> stripe grant, teams
-- with active agreements -> team grant, and every other non-archived
-- company with more than one member -> a 'manual' grant expiring NOW,
-- which starts their 20-day grace window at deploy time (the
-- grandfather cohort; metadata.reason = 'multi_user_grandfather').
-- =============================================================================
-- 1. company_multi_user_ok(company, grace_days): entitled-or-in-grace check
-- =============================================================================
-- True while the company may have several active people: an unexpired
-- multi_user grant (company- or team-scoped), or one that expired less than
-- p_grace_days ago. Never granted => false. company_capability_config is
-- deliberately NOT consulted: a config disable has no expiry to hang the
-- grace window on, and member access must not freeze through a side channel.
CREATE OR REPLACE FUNCTION public.company_multi_user_ok(p_company_id uuid, p_grace_days integer)
RETURNS boolean
LANGUAGE sql
STABLE SECURITY DEFINER
SET search_path TO 'public'
AS $function$
SELECT EXISTS (
SELECT 1
FROM public.capability_grants cg
WHERE cg.capability_key = 'multi_user'
AND (
cg.company_id = p_company_id
OR cg.team_id = (SELECT c.team_id FROM public.companies c WHERE c.id = p_company_id)
)
AND (
cg.expires_at IS NULL
OR cg.expires_at > now() - make_interval(days => GREATEST(p_grace_days, 0))
)
);
$function$;
REVOKE ALL ON FUNCTION public.company_multi_user_ok(uuid, integer) FROM PUBLIC, anon;
GRANT EXECUTE ON FUNCTION public.company_multi_user_ok(uuid, integer) TO authenticated, service_role;
-- =============================================================================
-- 2. resolve_active_company_gated(grace_days): the seat-gated resolution
-- =============================================================================
-- Semantics of resolve_active_company() (20260723161000) with one added
-- predicate: a membership resolves only when the caller is the company's
-- owner or the company passes company_multi_user_ok(). Keep everything else
-- IDENTICAL to the zero-arg function (resolution order, NULL auth.uid()
-- behavior, no writes); see its header for the invariants.
--
-- has_locked_membership is computed only when nothing resolved: it tells the
-- caller "this user has companies, but every one of them is frozen for them"
-- so middleware can route to the paused page instead of onboarding.
CREATE OR REPLACE FUNCTION public.resolve_active_company_gated(p_grace_days integer)
RETURNS TABLE(company_id uuid, locale text, used_fallback boolean, has_locked_membership boolean)
LANGUAGE sql
STABLE SECURITY DEFINER
SET search_path TO 'public'
AS $function$
WITH pref AS (
SELECT up.active_company_id, up.locale
FROM public.user_preferences up
WHERE up.user_id = auth.uid()
),
validated AS (
SELECT cm.company_id
FROM pref p
JOIN public.company_members cm
ON cm.user_id = auth.uid() AND cm.company_id = p.active_company_id
JOIN public.companies c
ON c.id = cm.company_id AND c.archived_at IS NULL
WHERE cm.role = 'owner' OR public.company_multi_user_ok(cm.company_id, p_grace_days)
LIMIT 1
),
fallback AS (
SELECT cm.company_id
FROM public.company_members cm
JOIN public.companies c
ON c.id = cm.company_id AND c.archived_at IS NULL
WHERE cm.user_id = auth.uid()
AND (cm.role = 'owner' OR public.company_multi_user_ok(cm.company_id, p_grace_days))
ORDER BY cm.created_at ASC
LIMIT 1
),
resolved AS (
SELECT COALESCE(
(SELECT v.company_id FROM validated v),
(SELECT f.company_id FROM fallback f)
) AS company_id
)
SELECT
(SELECT r.company_id FROM resolved r) AS company_id,
(SELECT p.locale FROM pref p) AS locale,
((SELECT v.company_id FROM validated v) IS NULL) AS used_fallback,
CASE
WHEN (SELECT r.company_id FROM resolved r) IS NOT NULL THEN false
ELSE EXISTS (
SELECT 1
FROM public.company_members cm
JOIN public.companies c ON c.id = cm.company_id AND c.archived_at IS NULL
WHERE cm.user_id = auth.uid()
AND cm.role <> 'owner'
AND NOT public.company_multi_user_ok(cm.company_id, p_grace_days)
)
END AS has_locked_membership
WHERE auth.uid() IS NOT NULL;
$function$;
REVOKE ALL ON FUNCTION public.resolve_active_company_gated(integer) FROM PUBLIC, anon;
GRANT EXECUTE ON FUNCTION public.resolve_active_company_gated(integer) TO authenticated;
-- =============================================================================
-- 3. Trial seeding: the eighth key
-- =============================================================================
-- Replaces ONLY the function body (same shape as 20260826130300): the byrå
-- suppression stays, the VALUES list grows by 'multi_user'. Keep in step with
-- lib/entitlements/keys.ts PAID_CAPABILITIES.
CREATE OR REPLACE FUNCTION public.seed_trial_capability_grants()
RETURNS trigger
LANGUAGE plpgsql
SECURITY DEFINER
SET search_path = public
AS $$
BEGIN
-- Byrå-team companies are covered by the team's agreement (WL-10):
-- no company-scoped trial, so no trial-expiry noise toward byrå clients.
IF NEW.team_id IS NOT NULL AND EXISTS (
SELECT 1 FROM public.teams t
WHERE t.id = NEW.team_id
AND t.kind = 'byra'
) THEN
RETURN NEW;
END IF;
-- Full PAID set as of 20260901081417; keep this VALUES list in step with
-- lib/entitlements/keys.ts PAID_CAPABILITIES whenever a key is added.
INSERT INTO public.capability_grants (company_id, capability_key, source, expires_at)
SELECT NEW.id, k.key, 'trial', NEW.created_at + interval '30 days'
FROM (VALUES
('ai'),
('bank_sync'),
('skatteverket'),
('email_send'),
('stripe_payments'),
('woocommerce_sync'),
('shopify_sync'),
('multi_user')
) AS k(key)
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
RETURN NEW;
END;
$$;
-- =============================================================================
-- 4. Backfills (idempotent: ON CONFLICT DO NOTHING against the scope index)
-- =============================================================================
-- 4a. Every trial-seeded company gets a multi_user trial row matching its
-- trial expiry, expired trials included: "the trial always covered
-- multi_user". Mid-trial companies stay fully entitled; long-expired ones
-- read as frozen exactly like a never-granted company, and the recently
-- expired land in whatever grace their trial end implies (4d then guarantees
-- multi-member companies a full window from deploy).
INSERT INTO public.capability_grants (company_id, capability_key, source, expires_at)
SELECT cg.company_id, 'multi_user', 'trial', max(cg.expires_at)
FROM public.capability_grants cg
WHERE cg.source = 'trial'
AND cg.company_id IS NOT NULL
AND cg.expires_at IS NOT NULL
GROUP BY cg.company_id
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
-- 4b. Companies with a live Stripe subscription: same shape the webhook sync
-- writes (source = 'stripe', period end + 3 days slack; see
-- lib/stripe/subscription-sync.ts). The next webhook upserts over this.
INSERT INTO public.capability_grants (company_id, capability_key, source, expires_at, metadata)
SELECT cs.company_id, 'multi_user', 'stripe',
cs.current_period_end + interval '3 days',
jsonb_build_object('backfill', 'multi_user_launch')
FROM public.company_subscriptions cs
WHERE cs.status IN ('active', 'trialing', 'past_due')
AND cs.current_period_end IS NOT NULL
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
-- 4c. Teams holding any active grant (byrå partner agreements) extend to
-- multi_user at team scope, so one paying byrå keeps covering all its client
-- companies. NULL expiry wins when any of the team's active grants never
-- expires.
INSERT INTO public.capability_grants (team_id, capability_key, source, expires_at, metadata)
SELECT cg.team_id, 'multi_user', 'manual',
CASE WHEN bool_or(cg.expires_at IS NULL) THEN NULL ELSE max(cg.expires_at) END,
jsonb_build_object('backfill', 'multi_user_launch')
FROM public.capability_grants cg
WHERE cg.team_id IS NOT NULL
GROUP BY cg.team_id
HAVING bool_or(cg.expires_at IS NULL OR cg.expires_at > now())
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
-- 4d. Grandfather cohort: every remaining non-archived company with more
-- than one member gets a grant expiring NOW, which puts it in grace until
-- deploy + 20 days. Owners are mailed the freeze date out-of-band; the app
-- shows the countdown banner from the first render after deploy.
INSERT INTO public.capability_grants (company_id, capability_key, source, expires_at, metadata)
SELECT c.id, 'multi_user', 'manual', now(),
jsonb_build_object('reason', 'multi_user_grandfather')
FROM public.companies c
WHERE c.archived_at IS NULL
AND (SELECT count(*) FROM public.company_members cm WHERE cm.company_id = c.id) > 1
AND NOT EXISTS (
SELECT 1 FROM public.capability_grants g
WHERE g.capability_key = 'multi_user'
AND (
g.company_id = c.id
OR (c.team_id IS NOT NULL AND g.team_id = c.team_id)
)
AND (g.expires_at IS NULL OR g.expires_at > now())
)
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
NOTIFY pgrst, 'reload schema';
@@ -0,0 +1,119 @@
-- Multi-user paywall hardening (skeptic findings on 20260901081417):
--
-- 1. company_multi_user_state(): state-returning SECURITY DEFINER twin of
-- company_multi_user_ok. The capability_grants SELECT policy hides
-- team-scoped rows from users who are not on the team (byrå clients by
-- design, WL-08), so any app-side read through a user-scoped client
-- misreads a team-covered company as frozen. All app-side state checks go
-- through this function first; the raw grants read stays only as the
-- fallback for not-yet-migrated databases.
-- 2. Byrå teams get a standing team-scoped multi_user grant (backfill +
-- trigger): the codebase's WL-10 assumption is that byrå client companies
-- are entitled via the team agreement (their company-scoped trial is
-- deliberately suppressed), so a byrå team without grant rows would
-- freeze every consultant and client user. Billing for byrå partners is
-- out-of-band (partner agreement), matching seed_trial_capability_grants'
-- suppression rationale.
-- 3. Comped/manual companies (active company-scoped comp/manual grants on
-- the pre-existing PAID keys) extend to multi_user: a hand-comped
-- multi-member company must not read as paying while locking out its
-- second user.
-- ============================================================================
-- 1. company_multi_user_state(company, grace_days)
-- ============================================================================
CREATE OR REPLACE FUNCTION public.company_multi_user_state(p_company_id uuid, p_grace_days integer)
RETURNS TABLE(state text, grace_ends_at timestamptz)
LANGUAGE sql
STABLE SECURITY DEFINER
SET search_path TO 'public'
AS $function$
WITH grant_rows AS (
SELECT cg.expires_at
FROM public.capability_grants cg
WHERE cg.capability_key = 'multi_user'
AND (
cg.company_id = p_company_id
OR cg.team_id = (SELECT c.team_id FROM public.companies c WHERE c.id = p_company_id)
)
),
agg AS (
SELECT
COALESCE(bool_or(gr.expires_at IS NULL OR gr.expires_at > now()), false) AS entitled,
max(gr.expires_at) AS newest_expiry
FROM grant_rows gr
)
SELECT
CASE
WHEN a.entitled THEN 'entitled'
WHEN a.newest_expiry IS NOT NULL
AND a.newest_expiry + make_interval(days => GREATEST(p_grace_days, 0)) > now() THEN 'grace'
ELSE 'frozen'
END AS state,
CASE
WHEN NOT a.entitled
AND a.newest_expiry IS NOT NULL
AND a.newest_expiry + make_interval(days => GREATEST(p_grace_days, 0)) > now()
THEN a.newest_expiry + make_interval(days => GREATEST(p_grace_days, 0))
ELSE NULL
END AS grace_ends_at
FROM agg a;
$function$;
REVOKE ALL ON FUNCTION public.company_multi_user_state(uuid, integer) FROM PUBLIC, anon;
GRANT EXECUTE ON FUNCTION public.company_multi_user_state(uuid, integer) TO authenticated, service_role;
-- ============================================================================
-- 2. Byrå team standing grant: backfill + trigger for future teams
-- ============================================================================
INSERT INTO public.capability_grants (team_id, capability_key, source, expires_at, metadata)
SELECT t.id, 'multi_user', 'manual', NULL,
jsonb_build_object('reason', 'byra_team_default')
FROM public.teams t
WHERE t.kind = 'byra'
AND NOT EXISTS (
SELECT 1 FROM public.capability_grants g
WHERE g.team_id = t.id
AND g.capability_key = 'multi_user'
AND (g.expires_at IS NULL OR g.expires_at > now())
)
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
CREATE OR REPLACE FUNCTION public.seed_byra_team_multi_user()
RETURNS trigger
LANGUAGE plpgsql
SECURITY DEFINER
SET search_path = public
AS $$
BEGIN
IF NEW.kind = 'byra' THEN
INSERT INTO public.capability_grants (team_id, capability_key, source, expires_at, metadata)
VALUES (NEW.id, 'multi_user', 'manual', NULL, jsonb_build_object('reason', 'byra_team_default'))
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
END IF;
RETURN NEW;
END;
$$;
DROP TRIGGER IF EXISTS trg_seed_byra_team_multi_user ON public.teams;
CREATE TRIGGER trg_seed_byra_team_multi_user
AFTER INSERT OR UPDATE OF kind ON public.teams
FOR EACH ROW EXECUTE FUNCTION public.seed_byra_team_multi_user();
-- ============================================================================
-- 3. Comped/manual companies extend to multi_user
-- ============================================================================
INSERT INTO public.capability_grants (company_id, capability_key, source, expires_at, metadata)
SELECT cg.company_id, 'multi_user', 'comp',
CASE WHEN bool_or(cg.expires_at IS NULL) THEN NULL ELSE max(cg.expires_at) END,
jsonb_build_object('backfill', 'multi_user_launch_comp')
FROM public.capability_grants cg
WHERE cg.company_id IS NOT NULL
AND cg.source IN ('comp', 'manual')
AND cg.capability_key IN
('ai', 'bank_sync', 'skatteverket', 'email_send', 'stripe_payments', 'woocommerce_sync', 'shopify_sync')
GROUP BY cg.company_id
HAVING bool_or(cg.expires_at IS NULL OR cg.expires_at > now())
ON CONFLICT (company_id, team_id, capability_key, source) DO NOTHING;
NOTIFY pgrst, 'reload schema';
@@ -0,0 +1,94 @@
-- Membership guard on the multi-user entitlement helpers (Superagent P3 on
-- PR #2099): both SECURITY DEFINER functions took a caller-supplied company
-- UUID and were granted to `authenticated`, so any logged-in user could probe
-- an arbitrary company's billing state (entitled/grace/frozen + deadline)
-- across tenants. Both now require the caller to be a member of the company
-- when a JWT is present; service-role/definer contexts (auth.uid() IS NULL)
-- keep unrestricted behavior for trusted server callers. The grace window is
-- also clamped to [0, 20] days so the parameter cannot widen the probe.
--
-- Non-member outcomes: company_multi_user_ok returns false;
-- company_multi_user_state returns its row with a NULL state (callers treat
-- only 'entitled'/'grace'/'frozen' as answers). Every legitimate caller
-- passes: the app only ever asks about companies the user is a member of,
-- and resolve_active_company_gated only evaluates the caller's own
-- membership rows.
CREATE OR REPLACE FUNCTION public.company_multi_user_ok(p_company_id uuid, p_grace_days integer)
RETURNS boolean
LANGUAGE sql
STABLE SECURITY DEFINER
SET search_path TO 'public'
AS $function$
SELECT
(
auth.uid() IS NULL
OR EXISTS (
SELECT 1 FROM public.company_members cm
WHERE cm.company_id = p_company_id AND cm.user_id = auth.uid()
)
)
AND EXISTS (
SELECT 1
FROM public.capability_grants cg
WHERE cg.capability_key = 'multi_user'
AND (
cg.company_id = p_company_id
OR cg.team_id = (SELECT c.team_id FROM public.companies c WHERE c.id = p_company_id)
)
AND (
cg.expires_at IS NULL
OR cg.expires_at > now() - make_interval(days => LEAST(GREATEST(p_grace_days, 0), 20))
)
);
$function$;
CREATE OR REPLACE FUNCTION public.company_multi_user_state(p_company_id uuid, p_grace_days integer)
RETURNS TABLE(state text, grace_ends_at timestamptz)
LANGUAGE sql
STABLE SECURITY DEFINER
SET search_path TO 'public'
AS $function$
WITH allowed AS (
SELECT
auth.uid() IS NULL
OR EXISTS (
SELECT 1 FROM public.company_members cm
WHERE cm.company_id = p_company_id AND cm.user_id = auth.uid()
) AS ok
),
grant_rows AS (
SELECT cg.expires_at
FROM public.capability_grants cg
WHERE cg.capability_key = 'multi_user'
AND (
cg.company_id = p_company_id
OR cg.team_id = (SELECT c.team_id FROM public.companies c WHERE c.id = p_company_id)
)
),
agg AS (
SELECT
COALESCE(bool_or(gr.expires_at IS NULL OR gr.expires_at > now()), false) AS entitled,
max(gr.expires_at) AS newest_expiry
FROM grant_rows gr
)
SELECT
CASE
WHEN NOT al.ok THEN NULL
WHEN a.entitled THEN 'entitled'
WHEN a.newest_expiry IS NOT NULL
AND a.newest_expiry + make_interval(days => LEAST(GREATEST(p_grace_days, 0), 20)) > now() THEN 'grace'
ELSE 'frozen'
END AS state,
CASE
WHEN al.ok
AND NOT a.entitled
AND a.newest_expiry IS NOT NULL
AND a.newest_expiry + make_interval(days => LEAST(GREATEST(p_grace_days, 0), 20)) > now()
THEN a.newest_expiry + make_interval(days => LEAST(GREATEST(p_grace_days, 0), 20))
ELSE NULL
END AS grace_ends_at
FROM agg a, allowed al;
$function$;
NOTIFY pgrst, 'reload schema';