Commit Graph
351 Commits
Author SHA1 Message Date
popertots 1179293777 fix: 2FA single-use consume is DB-atomic; login lockout escalates 15/30/60m with uniform 401
F5.5 brute-force hardening:
- internal/twofa.Check consume is now a conditional UPDATE (WHERE id AND
  two_factor_pending_code_hash) reporting rows affected: two concurrent
  verifications of the same code on different instances both match the digest,
  but only the first conditional UPDATE can affect a row — the loser sees 0
  rows and fails MissingOrExpired, so one code authorizes exactly ONE operation
  across instances (the per-user mutex only serialized within one process).
- /login lockout is now indistinguishable from a wrong password: a locked
  account returns the same uniform 401 'invalid credentials' and burns the same
  constant-time bcrypt compare (via the shared semaphore), removing the
  account-existence oracle and lockout-probing signal of the old 429.
- Lockout tiers escalate 15m (5+) / 30m (7+) / 60m (10+): an attacker who keeps
  guessing past each unlock makes the lock LONGER, raising the repeat-DoS
  effort while the response stays uniform.
2026-08-22 00:34:50 +01:00
popertots 4e398a7a2b fix: round-2 loop-B adversarial (503c326 baseline) — B1 webhook race, APPROVED refund semantics, notification cap single-source, 2FA cooldown/StateFor hardening, register bcrypt semaphore
Round 2 Loop B red-team (money/security/dup-mod adversarial) findings on the full payments overhaul:

MONEY:
- HIGH: webhook COMPLETED promotion now resolves the B1 parent row (mirrors the re-poll resolveB1ParentFailed + till-sale clawback) — the sweep no longer re-replays an expired key into stacked unauthorized charges
- HIGH: A6 deposit-with-discount clamp — chargeAmount capped to max(0, remaining-discount) for ALL discount cases; overflow guard compares against the discounted remaining
- MED-HIGH: APPROVED refunds treated as NON-terminal at the webhook (event-driven, may still fail); payments call sites aligned; FAILED can now demote an APPROVED-then-failed row
- MED: B1 refund transport-error fails the row + CRITICAL immediately (no 3-charge stacking)
- MED: till_sales capped-fail surfaces the outstanding funding (gift_card_transactions trace) for manual reversal
- MED: guest-bookings cash/gift-card terminal charges now audited (NULL target); audit reordered post-commit; cancellation refunds audited
- MED: A6 no-discount skip-path returns campaign_fully_redeemed 400 (no success-shaped no-op); skip-path writes a marker row for idempotency

SECURITY:
- HIGH: notification cap centralized in adminnotify (MaxUnacknowledgedCriticalLogs) + applied at ALL insert sites (webhooks x2, jwt refresh_token_reuse, account erasure, sweep, twofa) with suppressed-insert logging; per-issue bucket for reissue alerts
- MED-HIGH: twofa.StateFor saturated state made IMMUTABLE (LastMintAt writes are no-ops; no cross-user throttling); eviction never drops in-window count>0 records
- MED: /register now uses the shared bcrypt semaphore (authBcryptSlots, 20) — botnet CPU burn bounded
- MED: NAT collateral reduced (429-reject only at top progressive tier; lower tiers sleep)
- MED: ClearMintCooldownForUser exposed for fresh-charge success; reissue cooldown-skip raises a capped alert
- LOW: audit coverage gaps (reschedule fee forgiveness, gift-card transfer, clawback) closed

DUP/MOD:
- Frontend deposit-percent literals -> POLICY constants (10 sites); LOYALTY_DISCOUNT_RATE single-sourced; generateUUID adopted; admin PaymentModal overflow-tip confirm path added; £500 gift-card cap named

Verified: 26/26 dev + 24/24 prod (CI condition), both vet tags, frontend tests+build, env-docs 42/42.
2026-08-22 00:34:50 +01:00
popertots 3866cc5963 fix: round-2 loop-A fresh review (503c326 baseline) — B1 replay cap, A6 discount record, 2FA reissue+cooldown, notification flood, lockout saturation, VAT/refund-status consolidation
Round 2 Loop A fresh money/security/dup-mod review. 23 findings fixed:

MONEY:
- CRITICAL: B1 duplicate auto-refund gains an attempt cap (b1_attempts col, cap 3) —
  a rejected auto-refund no longer re-replays the expired key every sweep run
  (which minted a stacking unauthorized charge each time); FAILED-webhook
  demotion respects the cap; never re-replay a key whose B1 refund failed
- HIGH: A6 deposit_covered_by_discount skip path now APPLIES the eligible
  campaign discount rows immediately (capped) instead of skipping with no
  discount recorded — no more promised-discount-not-recorded overcharge
- MEDIUM: 2FA code burned by the SAVE gate is re-issued on failed
  new-card+save_card charges (re-issue guard now covers req.SaveCard)
- LOW: GetBookingPaymentSummary excludes tip rows from paidAmount (remaining
  now matches the authoritative tip-excluded balance)

SECURITY:
- MEDIUM: unacknowledged CRITICAL admin-notification flood capped (global cap
  on critical_payment_log + refresh_token_reuse rows)
- MEDIUM: 2FA reissue no longer bypasses the mint cooldown (Check no longer
  clears LastMintAt on gate-verify; cleared on terminal charge success)
- MEDIUM: twofa.StateFor map-saturation returns a shared permanently-locked
  state instead of a fresh 5-guess budget per request
- MEDIUM: ProgressiveRateLimit rejects 429 past maxProgressiveSleepDelayMs
  instead of sleeping unboundedly; login bcrypt concurrency semaphore added
- LOW: loginInProgress 409->429; webhook key-set/URL-unset startup check;
  email-verification per-user attempt counter

DUP/MOD:
- formatCurrency single source (frontend format.ts, 7 files consolidated);
  SquareRefundStatusToLocal single source (errors.go, all sites); admin
  audit-log helper dedup; SCA retry model unified (proactive on all 6
  surfaces); buyDailyTotal/daily-cap mirror via backend; lock TTL from
  backend; generateUUID at all card-form sites; magic numbers named
  (defaultPostgresHost, epsilon, fee constants); admin CASH + gift-card
  terminal charges now audited; DAV_SKIP_INIT documented in manuals

Verified: 26/26 dev + 24/24 prod (GO_TESTING=1, the CI condition), both vet
tags, frontend tests+build, env-docs 42/42.
2026-08-22 00:34:50 +01:00
popertots dfe856b181 fix: loop-B adversarial (503c326 baseline) — IDEMPOTENCY_KEY_REUSED reclassified ambiguous, 2FA reissue fail-closed alerts, family-cache crash window, consolidation regression checks
Loop B red-team (money/security/dup-mod adversarial) findings on the full payments overhaul:

- CRITICAL-ish: IDEMPOTENCY_KEY_REUSED (409) no longer classified as a definitive
  402 in chargeFailureStatus — it means the ORIGINAL charge may have landed with
  a different body, so it is now AMBIGUOUS (503): the frontend keeps the same
  idempotency key, the pending row stays rescuable by the sweep (which already
  treated it as ambiguous), and the frontend no longer regenerates the key into
  a possible double charge. SCA verification-required codes remain definitive 402.
- HIGH: reissueTwoFACodeAfterFailedCharge now writes a CRITICAL admin notification
  (insertCriticalPaymentNotification) when issuance is refused (missing pepper /
  unavailable delivery) instead of silently stranding the customer; documented that
  a pepper CHANGE invalidates all pending codes.
- MEDIUM: family-alive cache invalidation crash window documented (invalidate-after-
  commit leaves up to 30s warm on a crash; the near-TTL DB re-check bounds it).
- Consolidation regression checks (8b2fe3b helpers): writeChargeSnapshot guard
  preserved at all sites, postChargeRecheck identical, squareRefundStatusToLocal
  mappings verified, reissue fresh-only semantics confirmed at all 5 call sites.

Verified: 26/26 dev packages, both vet tags, frontend tests + build, env-docs 42/42.
2026-08-22 00:34:50 +01:00
popertots 36887167c6 fix: loop-A fresh review (503c326 baseline) — overflow-guard bypass, discounted-deposit retry, GDPR audit scrub, till cap, sweep rescue, 2FA reissue + SCA retry, consolidation round
Loop A fresh money/security/dup-mod review of the whole payments overhaul. 28 consolidated findings fixed:

MONEY:
- HIGH-1: B12 overflow guard now uses the discounted obligation — a pre-start deposit can never mint an unintended tip; the discount is never truncated to £0 when the customer pays the discounted deposit
- HIGH-2: discounted-deposit pending-reuse retry compares pendingStoredAmountPence vs chargeAmount (the actual Square amount), not req.Amount — no more permanent amount_mismatch 400 on lost-response retries
- MEDIUM-3: sweep rescue now carves overflow as a tip record + runs completion side-effects (was booking overflow as service revenue, skipping completion)
- MEDIUM-4 (shared w/ security): admin_audit_log.admin_id made nullable + anonymize_user/delete_guest_user NULL it + scrub details.card_last4 — 2fa_fallback_charge PII no longer survives account deletion
- MEDIUM-5: till gift-card payment now passes the £5,000/day admin cap (giftcard_limits)
- LOW-6: expired gift-card balance surfaced as expired/zero in GetUserGiftCardBalance

SECURITY:
- 2FA single-use consume made atomic at verify time for all 5 saved-card gates (fresh charges consume; pending-reuse retries don't); deferred consumption removed
- reissueTwoFACodeAfterFailedCharge routed through the fail-closed issuance gate (pepper check, cooldown) + fresh-only semantics (only when a code was actually consumed)
- family-alive cache invalidated on the stale-family cleanup DELETE (no 30s warm window after expiry)
- frontend 503-retry no longer reuses a consumed 2FA code — aligns with backend re-issue

DUP/MOD:
- reissue helper single-sourced (5 call sites), squareRefundStatusToLocal (10 inline switches), writeChargeSnapshot (7 sites, immutability guard on gift-card/till), postChargeRecheck (3+1 sites), scanIdempotencySlot (2), applyVATToChargeRecord (3 patterns), user_saved_cards upsert (2), BuyGiftCard pending INSERT via service
- till completed-dedup now re-validates paymentHasLiveRefund (aligns with booking/tip/gift-card)
- frontend 402 idempotency-key regeneration added to PaymentModal (aligns with other CIT surfaces)
- PAYMENT_METHOD_SAVED_CARD constant standardised ('saved_card' everywhere)
- admin audit coverage added for AdminRefundBooking + gift-card buy/top-up
- audit-helper cross-package dedup (user/twofa.go now calls payments' exported insert)

Verified: 26/26 dev + 24/24 prod packages, both vet tags, frontend tests + build, gitleaks clean.
2026-08-22 00:34:50 +01:00
popertots b7122be3a0 fix: SCA review round + gitea pipeline green — GDPR audit scrub, backend test gaps, frontend SCA/Square-API, docs parity
7 review agents (pipeline run, self-review, codebase-context, frontend-placement,
backend testing-gaps, Square-API, docs-parity) audited the SCA-primary work.
ALL findings fixed, including every pre-existing red CI job:

GDPR (HIGH):
- anonymize_user() now scrubs admin_audit_log.target_user_id (mirrors
  delete_guest_user) so 2fa_fallback_charge rows (customer id + card_last4 PII)
  no longer survive registered-user account deletion; gdpr test added

BACKEND TEST GAPS (all 10):
- delivery-unavailable 503 branch: prod-tag predicate test + dev-variant marker
- twoFactorFallbackEnabled alias/case/default matrix tests + exported wrapper
- insertTwoFAFallbackAudit details-JSON shape + audit-row assertions for all
  6 gate sites (booking/tip/gift-card/payment-method/terminal/till, both actors)
- CreateTerminalPayment.VerificationToken: passthrough, too-long 400, 2FA-skip,
  token-less fallback + SCA-required (new terminal_sca_test.go)
- isVerificationRequiredError at all 5 charge sites (402 + code:verification_required)
- customer_initiated handler-level assertions (MIT false admin / CIT true customer)
- Mock: ApprovePendingVerification, ChallengeResult auto/deny, _deny token suffix,
  parseVerifyToken unit tests

FRONTEND SCA + Square-API (CRITICAL):
- tokenizeSavedCardWithVerification reads result.token (the verified token) not
  result.verificationResult (deprecated verifyBuyer shape — saved-card SCA could
  never succeed in production before); parseTokenizeVerificationResult pure fn
  extracted + pinned in square.test.ts; 'verified' with no token proceeds tokenless
- HIGH: saved-card idempotency key regenerated after a definitive 402 (fresh token
  under the same key = IDEMPOTENCY_KEY_REUSED dead-loop); kept on 503/cancelled
- challenge-cancelled copy no longer promises a 2FA fallback the UI doesn't show;
  'waiting for approval in your banking app' state on CIT surfaces
- sca-unavailable demotion resets per attempt; card selection disabled mid-challenge;
  genuine saved-card declines no longer relabeled 'requires verification';
  modal-close guard during processing; retry affordance standardized

PIPELINE (every red job now green):
- prod-tag build break fixed (shared square stub + test_helpers_test.go, prod-safe)
- govulncheck: x/image 0.45.0 bumped (x/text resolved); go mod tidy clean
- race: TestDeleteAccount_InvalidatesSquareCustomerCache made deterministic
- DAV_ADMIN_PASSWORD placeholder in .env.example (compose config passes)
- frontend: prettier 28 files, eslint, a11y 38 errors, knip (currentZIndex),
  deps in-range, audit vulns (nanoid/postcss) — all fixed; 67 vitest cases

DOCS PARITY (6 DRIFTs + 5 GAPs): payments doc Ch4/Ch14/Appendix A, Technical
Manual 2FA + counter-reset + payment sections, README test counts + SNAPSHOT_ENC_KEY,
Feature Catalog, .env.example REQUIRE_2FA — SCA-primary/2FA-backup posture verified
against code everywhere

Verified: 26/26 dev + 24/24 prod packages, both vet tags, golangci-lint/staticcheck/
gosec 0 on both tags, gitleaks clean, 2,464 backend + 67 frontend tests.
2026-08-22 00:34:50 +01:00
popertots 5dae0bba08 feat: Square 3DS2 SCA primary authorisation for saved-card charges; 2FA demoted to audited backup
SCA is now the PRIMARY authorisation for saved-card (ccof) charges (PSR 2017 /
chargeback liability shift); the homegrown 2FA becomes a BACKUP used only when
SCA is unavailable (e.g. a bank without in-app approval), with a strict audit
trail. The 'approve in your banking app' UX comes from Square buyer
verification. Email/SMS remains the intended 2FA delivery channel; the [2FA]
stdout-log relay (TWO_FACTOR_ALLOW_LOG_DELIVERY=true) is the explicit-insecure
pre-email/SMS stopgap.

BACKEND:
- CreateTerminalPaymentRequest gains VerificationToken (forwarded to Square in
  the admin saved-card branch; validated like the other charge handlers)
- Structured SCA-required error surfacing: isVerificationRequiredError +
  writeVerificationRequiredResponse (HTTP 402 with {code:'verification_required'})
  at all 5 charge error sites — the frontend keys on it to trigger the challenge
- requireTwoFactorForCardAccess reworked: SCA token present => 2FA skipped
  (SCA primary); no token => 2FA fallback requires delivery channel + consume +
  insertTwoFAFallbackAudit (admin_audit_log reason 2fa_fallback_charge,
  {sca_performed:false,...}); TWO_FACTOR_FALLBACK env flag (default true) gates
  the fallback; false => SCA-only posture
- MIT vs CIT: admin till saved-card + admin booking saved-card charges now flag
  customer_initiated=false (merchant-initiated, no SCA, no liability shift);
  customer-initiated online flows keep true

FRONTEND:
- square_card_id threaded through SavedCard/SelectableCard + admin lists
- isVerificationRequiredSignal + shouldFallbackTo2FA helpers (402 + code / text
  fallback); VERIFICATION_REQUIRED_MESSAGE
- tokenizeSavedCardWithVerification (Square SDK tokenize(details, squareCardId))
  with verified/challenge-cancelled/sca-unavailable/sca-failed outcomes
- Per-surface SCA retry with the SAME idempotency key + fresh verification_token
  (booking/tip/till/gift-card/admin); 'waiting for approval in your banking
  app' state on admin surfaces; 2FA backup-only UX in the shared composable

MOCK PARITY:
- SimulateSavedCardVerificationRequired toggle (default off) + grandfathering
- Challenge state (ApprovePendingVerification/DenyPendingVerification,
  ChallengeResult config, token-encoded _ok|_deny outcome)
- One-time-use verify_mock_ token ledger + amount/source binding
- MockCardForm saved-card verification simulation + mock Approve button
- Tests: saved-card SCA gate, one-time-use, denied, amount-mismatch,
  grandfathered; frontend helper tests

DOCS: payments-doc SCA appendix, Technical Manual 2FA section, README,
Overview, Feature Catalog updated to SCA-primary + 2FA-backup; env-var
documented (42/42).

26/26 backend packages; 95/95 frontend tests + build; env-docs 42/42.
2026-08-22 00:34:50 +01:00
popertots ecef5da516 fix: sweep duplicate detection keys off the sweep's own replay instant, not a flip-flopping row-age window
The replayLegitimateRetryWindow constant (22h -> 24h -> 22h across three reviews)
was the wrong discriminator for 'original/retry vs expired-key duplicate' in the
stale-pending sweep: it is a row-age PROXY for 'when did THIS sweep replay the
key'. Each review flipped it because the true cutoff is the sweep's own replay
moment — a payment created at/after the sweep's ReplayPaymentByKey call can only
be the sweep's expired-key creation, and a payment created before it is the
original or a legit same-key retry, INDEPENDENT of Square's unverified ~24h key
retention (square_http_client.go:626).

- reconcileStalePaymentByKey now captures replayAt := clock.Now() immediately
  before the replay call and threads it through
- replayRevealsNewCharge / replayWithinLegitimateWindow compare the replayed
  payment's created_at against replayAt (upper bound) instead of
  row.CreatedAt + a fixed constant; the 5m lower-bound clock-skew tolerance is
  unchanged
- replayLegitimateRetryWindow constant and its rationale block removed (dead);
  replayRescueLowerBoundSkew docstring updated to reference replayAt
- sweep_test comments updated to document the new discriminator + why the
  constant approach flip-flopped (21h/22h/24h) and is now unnecessary

The keyed-replay tests (retry at 21.5h rescued; 25h-after-row auto-refunded)
still pass and now pin the correct, retention-window-independent behavior.

26/26 backend packages.
2026-08-22 00:34:50 +01:00
popertots 1543160f6a fix: loop-B full-scope adversarial findings — tip-excluded detail endpoints, £0-charge guard, 24h window, 2FA single-use everywhere
Loop B full-scope red-team (money/security/dup-mod) findings:
- CRITICAL: booking detail handlers (GetBookingHandler/GetAdminBookingHandler) now exclude payment_type='tip' from amount_paid — a tip before the final balance no longer undercharges the booking (bookings.go x3 sites)
- HIGH: A6 deposit clamp adds a zero-guard — when the eligible discount covers the entire deposit, the flow returns deposit_covered_by_discount instead of charging £0 at Square (real Square rejects £0; the mock accepted it); square_dev CreatePayment + CreateRefund now reject Amount <= 0 (mock/prod parity)
- HIGH: replayLegitimateRetryWindow restored to 22h (== stalePendingKeyedAge) so sweep-produced duplicate charges are still auto-refunded, not rescued-and-hidden
- HIGH: 2FA single-use consume-at-gate applied to ALL saved-card charge gates (booking 2263, admin saved-card 960, tip 4483, till 967, gift-card purchase 1482) with re-issue-on-failed-charge on each; pending-reuse retries keep their code
- MEDIUM: 2FA re-issue now fires only when the gate actually consumed a code (fresh saved-card path) — new-card failures no longer silently burn a standing code
- MEDIUM: pre_start tip-exclusion consistent across admin lists + detail handlers (bookings.go)
- MEDIUM: remaining-balance counts pending refunds (service.go) — capacity consistent with GetBookingPaymentInfo
- Mock CreatePayment/CreateRefund reject £0 amounts (INVALID_REQUEST_ERROR) for dev/prod parity

26/26 backend packages; 80/80 frontend tests + build; env-docs 41/41.
2026-08-22 00:34:50 +01:00
popertots 9a182db932 fix: full-scope review — tip-inclusive amount_due, sweep deposit-strand, A6 clamp cap, B13 clawback, 2FA single-use, mint audit, account-deletion re-auth, refresh dedup
Full-scope Loop A restart review (18 findings across money/security/dup-mod):

MONEY:
- HIGH: amount_paid/amount_due CTEs now exclude payment_type='tip' (bookings.go x6, today.go) — a tip before the final balance no longer undercharges the booking
- MEDIUM-HIGH: pending payment row stores the actual chargeAmount (not req.Amount) so the sweep replay amount-match rescues deposit-with-discount rows instead of auto-refunding them; refundSweepDuplicateCharge refunds the replayed payment's actual amount
- MEDIUM: A6 deposit clamp-up now caps at the discounted obligation (remainingPence - eligibleDiscountPence) — no more silent overcharge when a campaign discount >= deposit
- MEDIUM: B13 campaign-loss balance credits are clawed back on cancellation (clawbackB13CampaignCredit in ProcessCancellationRefundTx)
- LOW: replayLegitimateRetryWindow extended 22h->24h so a legitimate same-key retry in the retry-eligible window is rescued, not auto-refunded

SECURITY:
- 2FA single-use strengthened (consume-at-gate for fresh charges, re-issue on failure)
- Admin 2FA mint now writes admin_audit_log + logs code reuse
- Account deletion requires current password (and 2FA when enforced) — stolen token can no longer destroy the account
- Multi-tab refresh-token replay deduped via cross-tab lock (no false family-kill alerts)
- family-alive cache invalidated on password change / GDPR erasure
- Login lockout keyed per user+IP with a capped ceiling

FRONTEND/DUP-MOD:
- OverflowTipConfirm shared component (UserPaymentModal + BookingFlow); overflow computation aligned (deposit-discount-aware)
- PaymentModal admin 2FA gate now method-conditioned (no over-reveal on cash/giftcard)
- requestTwoFactorCode shared helper (requestNewTwoFactorCode + adminRequestNewTwoFactorCode)
- BookingFlow deposit display aligned to the discounted amount; formatCurrency used consistently

26/26 backend packages; 80/80 frontend tests + build; env-docs 41/41.
2026-08-22 00:34:50 +01:00
popertots b46927336b fix: dup/mod secondary round — till 2FA gate parity, mint-cooldown single source, notification parity, pence comments
Loop B dup/mod attack findings:
- TillPurchases admin 2FA gate now mirrors PaymentModal and the backend: gateActive = twoFactorEnforced && customerTwoFactorEnabled && paymentMethod='saved_card'; the customer's setup flag is fetched from GET /api/admin/users/{id} on selection. A 2FA-disabled customer in an enforced env no longer hits a dead-end blocked input — the charge 403 surfaces the actionable message via the existing self-heal.
- Extracted twoFAMintThrottled helper shared by SetupTwoFAHandler and ensurePendingTwoFACode — mint-cooldown rule can no longer drift between setup and disable-flow paths
- Notification-helper drift documented: sweep copy states the intentional booking+user scoping vs the canonical webhook copy (cross-referenced); auth refresh_token_reuse insert verified to carry the same NOT EXISTS acknowledged_at IS NULL guard; no import cycle (webhooks→payments one-way)
- Pence convention: 'rounded to the cent' corrected to 'pence' (handlers.go:2726)

26/26 backend packages; 72/72 frontend tests + build; env-docs 41/41.
2026-08-22 00:34:50 +01:00
popertots 7c424b28b8 fix: loop-B adversarial findings — tip-type double-charge, tip-refund capacity, loyalty stamp farming, gate ordering, auth amplification, admin audit log
Loop B restart (money/security/dup-mod adversarial) fixes:
- CRITICAL: CreateTerminalPayment rejects payment_type='tip' (mirrors CreateBookingPayment) — a tip-typed admin charge no longer records the FULL amount as a tip and double-collects (all is-paid computations exclude tip rows)
- HIGH: tip refunds can no longer re-open booking capacity — refunded_total subqueries filter payment_type <> 'tip' (service.go) and RefundPayment rejects tip rows
- MEDIUM: loyalty-stamp farming closed — stamp award once-per-booking via loyalty_stamp_awarded_at column (init-script.sql) + existing same-day guard
- MEDIUM: CreateTipPayment/CreateBookingPayment 2FA gates moved AFTER the idempotency completed-dedup (code consumed only on new money paths; terminal path already correct) — lost-response retries return the completed payment instead of 400
- MEDIUM: replayRescueLowerBoundSkew widened to 5m (DB-clock-skew stranded originals now rescued)
- MEDIUM-1: verifyFamilyAlive DB amplification reduced via 30s bounded family-alive cache; admin route group rate-limited
- MEDIUM-3: admin saved-card charges now write admin_audit_log (handlers.go helper + till); [2FA] log line decoupled from user identity
- LOW-1: logout scoped to the presented token's family (no cross-session kill)
- LOW-2: refresh-reuse grace widened for same-IP replays
- LOW-4: squareEnvironmentMismatch enforced for empty env
- LOW-5: uuid.ts hard-fails on Math.random fallback (crypto.randomUUID)
- Cash/giftcard tip-enabled overflow mirrors the card-terminal carve

26/26 backend packages; 72/72 frontend tests + build; env-docs 41/41.
2026-08-22 00:34:50 +01:00
popertots 03d85c6d13 fix: admin-scoped 2FA mint targets the CUSTOMER — user authentication for saved cards, never the admin
The till and admin payment modal 'Request a new code' buttons previously called
the session-scoped POST /api/user/2fa/code, which mints a code for the ADMIN's
session — a code that can never satisfy the card-owner gate and is delivered to
the admin's log line, not the customer.

- New POST /api/admin/users/{id}/2fa/code (AdminSendVerificationCodeHandler,
  RequireAdmin + per-user limiter): mints/reuses a code for the TARGET user
  (the card owner/customer), keyed to the CUSTOMER's userID so the [2FA]
  delivery log carries the customer's ID — the customer, never the admin, is
  the authentication subject for their card
- Shared useTwoFactorCodeForSavedCard composable gains an optional mint()
  option; admin surfaces (PaymentModal, TillPurchases) pass the customer-scoped
  mint, customer surfaces keep the session default
- Frontend: adminRequestNewTwoFactorCode(userID) in square.ts; PaymentModal
  mints for booking.user_id, TillPurchases for selectedCustomer.id
- Tests: admin mint keys the code to the customer's userID (log line contains
  customer ID, NOT the admin ID) + pending hash persisted for the customer;
  unknown target user 404s

Backend 26/26 packages; frontend 72/72 + build clean.
2026-08-22 00:34:50 +01:00
popertots a6a4683b74 fix: review round — B1 clock-skew tolerance + re-poll escalation, refresh-token access-token revocation, shared 2FA composable, per-package-DB test alignment
Three fresh reviews (money/security/dup-mod) cross-validated findings:
- MEDIUM: B1 'new charge' discrimination adds a lower-bound tolerance (replayRescueLowerBoundSkew) so a retained-key replay of the ORIGINAL charge (DB clock ahead of Square) is never auto-refunded; ambiguous margins leave PENDING + CRITICAL
- MEDIUM: B1 re-poll escalates after stalePendingB1RefundAge (48h) — FAILED/REJECTED refunds go terminal (fail parent, claw back till-sale funding, CRITICAL notification); no more unbounded re-polling / stranded parents without webhooks
- DRIFT-REAL: processManualPaymentGroup now checks PENDING/FAILED/REJECTED on the synchronous refund response (mirrors processChargeGroup/manual handler) — no more premature 'completed'
- HIGH: refresh-token family kill now also invalidates the attacker's freshly-minted ACCESS token — access tokens carry a family_id claim and VerifyToken rejects tokens whose family was deleted (GenerateTokenForFamily + family-alive check); 30s grace window for concurrent two-tab refresh (no false theft alert)
- LOW: 2FA mint endpoint returns remaining_seconds; in-memory 2FA counters documented; 90-day refresh expiry single-sourced (RefreshTokenLifetime + make_interval)
- Dup/mod: NEW shared useTwoFactorCodeForSavedCard Svelte composable replaces 6 surface copies of the 2FA gate logic (Request-a-new-code added to BookingFlow + TillPurchases); account page adopts generateUUID
- Test architecture: removed t.Parallel() from 8 global-SquareClient-swapping tests per Testing Architecture doc line 89 (B1 flaky-test lesson) — fixes within-package race
- SQL alias pence rename (total_cents/paid_cents -> total_pence/paid_pence)

26/26 backend packages; 72/72 frontend tests + build; env-docs 41/41.
2026-08-22 00:34:50 +01:00
popertots 4d5d2cd381 fix: restart-loop-A findings — pending sweep refunds, tip carve on discounts, TOCTOU redemption, single-use 2FA code + mint endpoint, refresh-token family revocation, admin 2FA code UX
Restart of Loop A (fresh review -> fix -> verify) findings from commit 5e967fa:
- B1: sweep auto-refund treats Square PENDING refunds as NON-terminal (row stays pending, no gift-card clawback, refunds row inserted for payments AND till_sales, re-polls the deterministic sweepdup- key); Square-less pre-pass exempts square_refund_id IS NOT NULL rows
- M4: terminal tip carve accounts for pending campaign discounts (headroom = total - pending - paid) so explicit tips aren't absorbed as service revenue; no-tip case stays a single record
- max_redemptions TOCTOU closed with atomic conditional UPDATE ... RETURNING; exhausted-at-apply surfaces campaign_fully_redeemed
- 2FA: verification code is single-use on the saved-card gate (VerifyForUser consume=true, interactive flows unaffected); new POST /api/user/2fa/code mints a fresh code for enabled users (RequireAuth + RequireNonGuest + mint cooldown + per-user limiter)
- Refresh tokens: family_id + used_at columns; reuse of an already-rotated token revokes the ENTIRE family and inserts a refresh_token_reuse admin alert; rotation mints descendants in the same family
- Frontend: 2FA code input + Request-a-new-code on all saved-card surfaces; admin modal keys code input to customer 2FA + 403 self-heal; tip-display note for pending discounts; 76 frontend tests
- Verified: all 26 backend packages pass, frontend build+tests green, env-docs 41/41
2026-08-22 00:34:50 +01:00
popertots fe88f2084d fix: review-loop B — adversarial findings (sweep auto-refund, admin clamp, 2FA real challenge, opaque refresh tokens, gated client IP, GBP pence)
Loop B aggressive adversarial round (3 attack agents) + fix + secondary + verification:
- CRITICAL: sweep replay auto-refunds provably-created-later duplicate charges (gated on parseable CreatedAt); 22h legitimate-retry window == 22h sweep cutoff (no dead zone)
- HIGH: admin Take Payment clamps to remaining obligation (cash/giftcard/saved-card/terminal); no unintended tip from overflow; campaign credit against remaining
- HIGH: /api/services/eligible-for/{id} requires auth + owner-or-admin (DOB/age + patch-test health-data leak closed)
- HIGH: opaque refresh-token rotation (login/refresh return {token, jti, refreshToken}; refresh REQUIRES opaque token; single-use rotation; logout revokes; access token rejected at refresh)
- HIGH: saved-card charges require a REAL 2FA verification code (B6/B10) — backend gate on all 8 charge paths + shared TwoFactorCodeInput frontend component on all 7 surfaces; 2FA gate is no longer setup-flag-only
- MEDIUM: ungated CF-Connecting-IP in reserve/admin_reserve gated via exported mw.ClientIP; 2FA limiter keyed on userID alone (no header-rotation bypass); ChangePassword actually revokes JTI + refresh tokens; 2FA setup mint cooldown + persistent failed-attempt counter; campaign redemption race surfaces campaign_fully_redeemed
- Terminal saved-card VAT applied (was under-collected); age-guard reconcile failures notify; isWeakJWTSecret entropy gate; gift-card redeem per-card counter + per-user limiter; webhook signature key startup validation
- NEW internal/twofa package (single source of truth breaking the payments<->user import cycle); consolidation of duplicate 2FA hash/verify
- Frontend: refresh-token storage + rotation, TwoFactorCodeInput component, amountPaidPence in admin modal, B5/B6/B10 contract wiring; 70 frontend tests
- Tests: loop_b_fixes_test.go, internal/twofa tests, updated auth/services/profile/twofa/mw tests

All 26 backend packages pass (incl. internal/twofa); frontend 70/70 + build clean; env-docs 41/41.
2026-08-22 00:34:50 +01:00
popertots faceb9809c fix: review-loop A — discount credit on admin payments, campaign over-credit cap, sweep replay window, dedup refund revalidation, duplication/modularisation, GBP pence naming
Round-A fresh review (6 agents) + fix + secondary cross-cutting + verification rounds:
- F1: campaign discounts reduce the charged amount (deposit credit + admin PaymentModal discounted total); capDiscountToRemainingObligation prevents over-credit at completion in all four campaign blocks
- F2: sweep replay rescue distinguishes legitimate same-key retries (21h window) from expired-key new charges; ccof blind-fails leave pending + CRITICAL instead of clawing back
- F3: post-start online overflow carved as a tip record (mirrors terminal split builder)
- A1: single-source Square decline-code classification (till delegates to square.IsDefinitivePaymentError)
- A2/A5: refund attempt-cap literals consolidated; refund-failure counter capped + reset on terminal resolutions + admin notifications
- A3/A9: idempotency helpers adopted across derivations; IsExplicitDevOrMockEnv relocated + all gates unified (incl. health-check)
- A7: 2FA user+IP limiter + TRUST_PROXY_HEADERS startup warning; SNAPSHOT_ENC_KEY startup validation; TWO_FACTOR_PEPPER docs corrected
- A8: snapshot encryption on all 6 write sites + marker-aware reuse paths; MPV->SPV effective voucher type (single VAT point)
- A10/A11/A12/A16: gift-card slot scan advances past failed; amount-aware refund reconciliation; completed-booking refund re-check; PaymentWasRefunded on SquareClient interface
- Dedup refund revalidation on tip/terminal/gift-card paths; sweep acknowledged_at IS NULL parity; refund-notification single source (exported payments.InsertRefundFailedNotifications)
- Duplication/modularisation round: shared frontend helpers (sanitizeDecimalInput, campaignDiscountCents, twoFactorBlocksSavedCards getter, generateUUID), single-source MaxIdempotencyKeyLength, notification-helper consolidation, snapshot-guard comments
- Cross-cutting GBP rename: Cents->Pence across backend + frontend + tests (26 identifiers, 16 files)
- Tests: 11 behavior-change tests updated to new invariants; coverage for fixed functions; frontend vitest 55 tests; docs corrected (test counts, 2FA delivery, pre-launch checklist, resolution status)
- gitleaks: allowlist backend/internal/square test fixtures (mock idempotency keys)

All 25 backend packages pass; frontend 55/55 + build clean; env-docs 41/41.
2026-08-22 00:34:50 +01:00
popertots 6d82535780 fix: adversarial review round — replay-rescue double-charge, discount credit, 2FA/per-IP limits, snapshot encryption, refund reconciliation, VAT, frontend parity, tests+docs
Addresses the adversarial fresh-eyes audit (findings A1-A20) plus review-round fixes:
- CRITICAL A1: replay-by-key rescue cross-checks replayed CreatedAt; ccof blind-fail leaves pending with CRITICAL + notification instead of clawing back
- A2/A3/A4: till idempotency key restored to unconditional hash; tip rejected in CreateBookingPayment; campaign discount now reduces the charged amount (deposit credit)
- A5: admin notifications on blind-fail, manual-refund re-arm, cap-stranded charge-group, webhook FAILED/REJECTED refunds
- A6/A10: BuyGiftCard idempotency user-scoped; gift-card slot scan advances past failed rows
- A7/A14/A15: 2FA user+IP limiter, SNAPSHOT_ENC_KEY startup validation, accurate pepper/log-delivery docs
- A8/A9: snapshot encryption on all write+reuse sites; MPV->SPV effective voucher type (single VAT point)
- A11/A12/A13/A16: amount-aware refund reconciliation; completed-booking refund re-validation; till retry dedup; PaymentWasRefunded on SquareClient interface
- A17/A18/A19/A20: CI runs npm test; confirm_overflow_tip frontend dialog; unknown-event admin notification; mock token redaction
- M7 ConfirmOverflowTip, M9 snapshot encryption, C1 discount ordering regression test
- Frontend vitest framework (41 tests), backend coverage for fixed functions, docs corrected (2,269 tests, SUPPORT_EMAIL tokens, resolution status)

All 25 backend packages pass; frontend 41/41; build + env-docs green.
2026-08-22 00:34:50 +01:00
popertots 78e6d00dc5 fix: payments review rounds — money-safety, GDPR, security, gift-card cancel, modal stacking
Money-safety:
- Deterministic till idempotency fallback (Square-charging only); cash/on_the_house keep unique keys; £250 till gift-card cap; 45-char key validation
- Gift-card admin caps £250/tx + £5,000/day; user buy £500/day; BuyGiftCard allowlist unchanged
- CancelGiftCard: CCR 2013 14-day right with partial-spend refund of the unspent balance (spend verified via payments.gift_card_id); atomic vs redeem/transfer; refunds stay pending until reversal commits; admin cancel surface (AdminCancelGiftCard)
- Sweep: cancelled-booking charges failed+notified instead of silently completed; source-override replay uses live square_source_id; legacy square-less refund sweep; snapshot refresh on pending reuse
- Refund lock consolidation; recordTerminalPaymentTx shared recorder; structured Square error codes; terminal checkout CustomerID

GDPR / security:
- Notes retained as de-identified medical/safety record at erasure (single field treated as health data; rest of record wiped, no re-identification map) + comments updated per UK GDPR/Art 9/Equality Act 2010
- square_request_snapshot PII scrubbed on all erasure paths; delete_guest_user FK unlinks; verification codes + dispute reasons handled; idle/stale-guest erasure deletes Square cards/customers + CardDAV/R2
- Durable square-erasure outbox job (retry-square-erasures); 2FA dev/prod build split, pepper fail-closed, no prod code-in-log; prod 2FA delivery fail-loud without a channel
- Webhook unknown-type family split (non-money acked, money retried); untracked dispute notifications; rate-limit CF/X-Real-IP trust gating; nginx CSP nonce + api_limit

Frontend:
- Dynamic z-index stack (ui/dialog/zindex.ts) claimed in open order via data-state observer; re-claims on every reopen; removes stale !z-* overrides — nested modals (booking→user→booking) always paint newest-on-top (browser-verified 3-level + reopen)
- Mobile: iOS zoom fixes, bottom-sheet dialogs, 44px touch targets, inputmode decimal, dvh
- Gift-card buy/cancel UI, admin £250 + daily limits, cancellation/privacy/terms policy accuracy

S3:
- Connect() creates buckets before probing; in-memory fallback only on genuine unreachability; health reports degraded; stale S3_PUBLIC_URL documented (host-specific)

Tests/docs:
- 2263 test functions; all 22 backend packages green; round8/9/10 regression suites; NextEditWindowTime removes wall-clock flake; docs reconciled (notes retention, gift-card partial-use, modal T15 future work)
2026-08-22 00:34:50 +01:00
popertots 9111258461 fix: 2FA disable now requires the verification code (enforced mode)
The disable flow was broken in enforced (production) mode: the account page
posted {code:''} to /api/user/2fa/disable, but the backend mints + validates a
code when 2FA is enforced, so the empty code always failed with 400 and a user
could never disable 2FA through the UI. In unenforced (dev/mock) mode the
backend short-circuits and no code is needed — which is why the user only saw
the confirmation dialog and no code prompt.

Backend:
- New POST /api/user/2fa/disable/code (SendDisableCodeHandler): mints +
  delivers a fresh disable-flow code via the existing ensurePendingTwoFACode
  machinery (per-user 1-min mint cooldown, 429 when throttled, 5-attempt
  lockout preserved on the disable call itself). This is the disable-flow
  equivalent of /api/user/2fa/setup. Runs unconditionally (no dev
  short-circuit) so the step is exercisable in dev too. Route mounted in
  main.go beside the other 2FA routes.
- Tests: mints fresh code, reuses valid pending code (hash unchanged),
  mint-throttled 429 (after the pending code is dropped, as a lockout does),
  unauthorized 401, unenforced still mints.

Frontend (account page):
- The disable confirmation now branches on twoFactorRequired: enforced →
  POST /api/user/2fa/disable/code to mint, then a 6-digit code-entry input +
  'Confirm Disable' button that posts the code to /api/user/2fa/disable;
  unenforced (dev) → unchanged direct disable. Code entry mirrors the enable
  flow's input styling; mint-throttle 429 / wrong-code 400 / lockout 429 all
  surface as toasts with the entry kept open for retry.

Verification: go test -tags test,dev -count=1 -parallel 8 ./... (all 20
packages ok, 0 failures incl. 5 new 2FA tests), go build ./... and -tags dev,
go vet clean, svelte-check 0 errors 0 warnings, env-docs gate OK.
2026-08-22 00:34:50 +01:00
popertots 6691cd5657 fix: rate-limit per-IP keying + dev no-op, admin 2FA recovery, 2FA account UI, admin modals, tip totals
Rate limiting (backend):
- RateLimit/ProgressiveRateLimit now derive the per-client key from
  CF-Connecting-IP, then chi's GetClientIP (the X-Real-IP value nginx sets at
  main.go:323), then RemoteAddr. Previously only CF-Connecting-IP/RemoteAddr
  were used, so behind the Docker nginx every client shared ONE bucket per
  limiter — 10 logins/min site-wide blocked all users (the reported
  'Error: Rate limit exceeded' after seeding was the login 10/min bucket
  tripped by the seed's 11 logins, all keyed 127.0.0.1 in dev).
- Real implementation is now //go:build !dev || test; new
  mw/ratelimit_dev.go (//go:build dev && !test) is a no-op passthrough, so
  'go run -tags dev' (the dev harness) never rate-limits dev/seeding traffic,
  while production and tests (-tags test,dev) keep the real limiter. The docs
  (Technical Manual) already claimed dev no-op behaviour — the code now
  matches. NewProgressiveRateLimiter is provided in the no-op build because
  tag-free ratelimit_shared.go:104 initializes the global at package init.

Admin 2FA management (backend):
- users.two_factor_last_used_at TIMESTAMPTZ column (init-script, fresh-DB).
- AdminUserDetail now returns twoFactorEnabled/twoFactorMethod/
  twoFactorLastUsedAt.
- New POST /api/admin/users/{id}/2fa/remove (admin-only): clears all 5 2FA
  columns + drops the user's in-memory attempt/lockout state — an admin
  recovery path when a user loses 2FA access.
- two_factor_last_used_at updated on every successful 2FA verification.

Account page (/account):
- 2FA section moved under the Notifications heading, visible to all roles;
  Email/SMS toggles (Notifications styling) acting as a radio group with
  'none' state; Apply button only when the selection differs from saved;
  unselecting shows a payment-rules warning dialog; the dev-comment
  '2FA is optional right now (REQUIRE_2FA is off)' and the 'Dev code:' debug
  line are removed.
- Cards tab hidden from admin role.

Admin modals:
- User Details modal: new 'Two-Factor Authentication' section above Patch
  Tests showing Enabled/Disabled, method, last-used timestamp, and a Remove
  2FA button with a confirmation dialog (POST to the admin endpoint, refetch
  on success).
- Booking Details modal: the customer's name now links to their User Details
  modal (optional openUserModal prop threaded through admin/+page and
  today/+page; other call sites unaffected).

Take Payment + /today:
- PaymentModal shows pre-tip (netTotal) and post-tip (totalWithTip) totals
  with a tip-amount delta row only when a tip is selected; zero-tip flow
  unchanged.
- The /today Payment button is hidden unless the booking is in_progress or
  completed, matching the backend gate (was shown for confirmed/pending
  bookings, producing the 'Booking must be in_progress or completed' error).

Verification: go test -tags test,dev -count=1 -parallel 8 ./... (20/20 ok
incl. new admin 2FA tests + mw tests), go build ./... and -tags dev both
compile, go vet clean, svelte-check 0 errors 0 warnings, env-docs gate OK,
docker compose config valid.
2026-08-22 00:34:49 +01:00
popertots 5cc5a7f6d2 fix: review round 7 — fresh-eyes audit fixes (6 agents) + full test suites for every backend change
Fresh-eyes review round with 6 independent agents (money-safety, concurrency,
Square wire parity, security, frontend flow, testing-gaps). Every finding was
independently verified against the code before fixing. All backend changes
now carry full test suites (10+ new tests, each verified to FAIL without its
guard). All 20 packages green, race detector clean.

Money-safety:
- Gift-card purchase refunds no longer create money: manual refunds of a
  no-booking (gift-card purchase) payment are rejected with a clear message
  in the direct handler AND never re-issued by the sweep-resume path
  (processManualPaymentGroup skips them; reconcile-then-fail, no re-issue).
- BuyGiftCard no-client-key fallback: derived deterministically under the
  advisory lock (pending-row reuse fixes lost-response double-charge;
  completed-row sequence advance preserves distinct-purchase collapse fix).
- Terminal completion is never unrecorded: activeTerminalCheckoutID now calls
  recordUntrackedTerminalPayment when a provisional (tmp-) checkout is found
  COMPLETED at Square (previously only marked the row COMPLETED — a lost poll
  left the payment invisible and unrefundable).
- Sweep: provisional tmp- checkout rows are resolved against Square first
  (COMPLETED → record; live → keep guard; NOT_FOUND/CANCELED → fail;
  ambiguous → leave pending) instead of blind-failing a possibly-live
  checkout. recordUntrackedTerminalPayment re-checks the booking status
  (FOR UPDATE) and refuses to record on a cancelled booking, inserting a
  critical_payment_log admin notification instead. Till-sale post-charge
  UPDATE now requires status='pending' (no resurrection of a clawed-back sale).

Frontend (Svelte 5):
- UserPaymentModal keeps CardSelection mounted through processing (bind:this
  ref + Square iframe survive the loyalty/tokenize awaits) — new-card
  payments work again.
- BookingFlow clears the cached nonce/verification pair on any failure (retry
  re-tokenizes fresh; idempotency key retained for dedup); 409 'already paid'
  refetches the booking and reconciles depositPaid so the confirmation gate
  opens; Back button disabled during processing.
- Synchronous double-submit guards on buyGiftCard/redeemGiftCard/submitTip.

Square wire parity (mock vs real):
- processing_fee sign unified (negated at paymentFromSquare; mock agrees).
- SimulateSourceUsed (SOURCE_USED, 400) matches real CreateCard.
- GetCardsOnFile excludes disabled cards (matches ListCards).
- ForcePaymentStatus toggle + tests prove the charge path can't be status-blind.
- CreateCheckout rejects empty device_id (env fallback SQUARE_TERMINAL_DEVICE_ID);
  completed terminal checkout's payment resolvable by id.

Security:
- 2FA attempt-map data race fixed: lastAt is atomic.Int64 (nanos) — eviction
  scan reads race-free; concurrent verify+evict tests under -race.
- Backend refuses to start on weak/placeholder JWT_SECRET_KEY (<32 chars or
  known public placeholders) with openssl rand -hex 32 guidance.
- Dockerfile no longer COPYs .env (secrets injected via compose env_file).
- SabreDAV requires DAV_ADMIN_PASSWORD (no admin/admin default); compose
  fails at config time when missing.

Testing gaps closed (each verified to FAIL without its guard):
- refunded-dedup 409 (CreateBookingPayment), keyed sweep past-retention
  blind-fail, reconcile status-switch (CANCELED/FAILED/APPROVED/PENDING/unknown
  in both by-key and by-id paths), resolveChargeSource Square-failure branches,
  structured 500 / CARD_DECLINED / cancelled-context E2E (row stays pending),
  deriveBookingPaymentIdempotencyKey >45-char truncation, webhook
  findPaymentByDisputeID fallback, clawbackOneTillSale non-gift-card branch,
  dispute.evidence / terminal.checkout dispatch.

Infra:
- local-dev-2.sh fails loudly on port-5432 squatters / docker compose failures
  (previously died silently under ERR_EXIT with hidden output).
- Test harness defaults SQUARE_TERMINAL_DEVICE_ID; money_safety_fixes_test.go
  gained the missing build tag.

Verification: go test -tags test,dev -count=1 -parallel 8 ./... (20/20 ok),
-race clean on 2FA + payments money paths, go build ./... + -tags dev, go vet
clean, svelte-check 0 errors, env-docs gate OK (36 vars), docker compose
config valid.
2026-08-22 00:34:49 +01:00
popertots 67cf5b9a45 fix: review round 6 — P0 deposit charge, idempotency rotation, dev-safety guard, 2FA/webhook hardening
Sixth fresh-eyes review pass (5 agents: goal, QA, code-quality, security,
context-mining). QA FAILED the deposit-required new-card flow; the P0 root
cause was backend + frontend, now fixed. All 20 packages green.

P0 money-safety:
- Deposit-required bookings now actually charge the deposit on new-card
  payment. Two-part fix: (1) CreateBookingHandler re-reads the
  trigger-maintained total_amount/total_duration_minutes from the DB after the
  booking_services insert (the INSERT..RETURNING row predates the recalc
  trigger, so TotalAmount serialized as 0 and DepositPaid computed TRUE on an
  unpaid booking — the frontend gate trusted deposit_paid:true, never charged,
  and confirmed the booking with zero payment rows); (2) BookingFlow.svelte
  gates the confirmation view on depositPaid and guards against re-creating a
  booking on retry. Regression test
  TestBookings_Create_DepositPaidFalseOnUnpaidBooking.

Payments (idempotency + money):
- deriveBookingPaymentIdempotencyKey: no-client-key fallback now advances a
  sequence for repeatable types (partial) and rotates past refunded completed
  rows, so refund-then-repay and equal-amount partials diverge onto distinct
  keys; an un-refunded completed row keeps its key (double-charge protection
  holds). Dedup hits on refunded rows now 409, never stale success.
- chargeFailureStatus default is 503 (ambiguous), never 402; table test.
- Flaky TestBookingPayment_FullPayment_SplitsIntoDepositAndBalance fixed
  (ORDER BY payment_type).
- resolveChargeSource: orphaned card-on-file disabled via DeleteCardOnFile
  when SaveCardForUser fails (best-effort, redacted log); retry path preserved.

Square client:
- Dev builds HARD-FAIL (panic) on SQUARE_ENVIRONMENT=production without
  SQUARE_ALLOW_REAL_API=1; sandbox routes with a loud banner.
- Mock fault-injection FailAfterCommit (commit-then-5xx) exercises the exact
  lost-response same-key retry; SimulateCardTokenUsed; 45-char idempotency-key
  cap parity; SquareEnvironment/SquareLocationID shared env helpers used by
  the sweep (env contract no longer comment-only).
- listRefunds truncation now errors (money-sensitive reconcile retries
  instead of over-refunding); getCardsOnFile truncation loudly logged.

Webhooks + 2FA:
- square-environment header checked fail-closed (403) when configured env is
  production/sandbox; dispatch DB work bounded by 30s timeout contexts.
- 2FA codes HMAC-SHA256 pepper'd (TWO_FACTOR_PEPPER) with legacy-hash
  migration + upgrade-on-verify; disable-flow mint cooldown (1/min, 429) caps
  the brute-force loop; in-lockout records never LRU-evicted.

Repo hygiene:
- env-docs CI gate green again (FRONTEND_ORIGIN + SQUARE_ALLOW_REAL_API +
  TWO_FACTOR_PEPPER documented; Vite DEV built-in allowlisted).
- Dead square_deposits schema dropped; obsidian/README/legal-page drift fixed
  (consumeradvice.scot signposting, CORS allowlist, p11 R3/P13, T1).
- 2FA disable residual documented; P6 email/SMS delivery and P12 sandbox
  smoke test remain the pre-go-live gates.

Verification: go test -tags test,dev -count=1 -parallel 8 ./... (20/20 ok),
go build ./... + -tags dev, go vet clean, svelte-check 0 errors, env-docs
gate OK, live deposit-required flow re-verified end-to-end (deposit £11
charged, square_payment_id recorded).
2026-08-22 00:34:49 +01:00
popertots fdf3f64a13 fix: review round 4 — per-dispute chargeback alerts, single-source clawback, 2FA lockout coherence, docs
Fourth fresh-eyes review pass (5 agents: goal, QA, code-quality, security,
context-mining). All PASS on the money-safety core; this round closes the
remaining MAJOR/MINOR items they surfaced.

Webhooks:
- Untracked disputes now raise ONE admin notification PER distinct chargeback:
  the notification id is derived deterministically from the square_dispute_id
  (SHA-256 truncated into the CHAR(12) slot) so a second untracked dispute is
  no longer silently suppressed by the first's dedup row. ON CONFLICT (id)
  keeps same-dispute replays idempotent; the booking-scoped NOT EXISTS guard
  is retained for the tracked path. Verified: distinct disputes -> distinct
  rows; re-delivered dispute -> one row.
- The gift-card clawback SQL now lives in exactly ONE place:
  payments.RevertGiftCardFunding (new giftcard_clawback.go). till.go and the
  webhook path both call it — eliminating the byte-for-byte copy whose
  divergence would be a money-loss drift trap (the same two-sources-of-truth
  pattern this commit eliminated for GDPR scrubbing).

2FA:
- Applied the lockout-coherence fix from the review: when a disable request
  must mint a fresh code (no valid pending one), the held attempt counter is
  reset so the locked-out user can use the freshly delivered code in the SAME
  request (no wasted round-trip). The reuse path keeps accumulating wrong
  attempts toward the 5-attempt lockout — the two behaviors no longer
  conflict. (The 'always-fresh on disable' suggestion was NOT adopted: it
  would break the out-of-band [2FA]-log delivery model, since a code generated
  by a request can never be submitted within that same request.)
- New test pins the shared verify/disable lockout: 5 wrong verifies 429 and
  destroy the code; a stale code then 400s on disable while the freshly
  delivered code succeeds in the same request.
- Startup now warns that 2FA codes travel in PLAINTEXT via the server log in
  enforced mode (operator must restrict log access + relay out-of-band until
  email/SMS lands).

Docs:
- Test counts updated to the current 2,154 across README + Technical Manual.
- User Manual 2FA nav corrected: the settings live on the Account page, not an
  'Admin' area.

Tests: 2,154 (up from 2,151). Backend 25/26 packages green (crussell/db fails
only in this environment: local postgres auth for the test role; package
byte-identical to HEAD). Frontend builds; svelte-check 0 errors.
2026-08-22 00:34:49 +01:00
popertots 9bb812669e fix: fresh-review round — 2FA deliverability, disable re-verification, GDPR batch scrub, dispute alerting, docs accuracy
Second fresh-eyes review pass (7 agents: goal, security, code-quality,
context-mining, webhooks+2FA, client+mock+sweep, refunds/giftcards/handlers).
Money-safety core verified sound (identical-body replay byte-lossless, clawback
gated on definitive proof, no double-charge window). This round fixes the
issues the fresh pass surfaced:

2FA:
- Setup now DELIVERS the code via the [2FA] server log in ALL modes (was:
  nothing in enforced mode -> production 2FA was an unbreakable dead-end and
  saved-card charges were permanently 403). Enforced mode still withholds the
  code from the API response; the log line is the fake delivery channel until
  email/SMS lands (P6).
- Disabling 2FA now requires a fresh verification code when enforcement is ON
  (previously ignored the code -> a password-only attacker could lift the gate).
  Shares the 5-attempt lockout and timing-safe compare. Dev bypass retained.
- REQUIRE_2FA parsing normalized (false/0/off/no, case-insensitive);
  startup warning extended to the empty-env/mock-client/enforced-2FA confusion.

GDPR:
- anonymize_user() SQL now scrubs two_factor_* columns + staff notes, so the
  idle-account batch cleanup (CleanupIdleAccounts) is erasure-clean, not just
  the user-initiated delete path.

Webhooks:
- dispute.created for an untracked Square payment now raises a
  critical_payment_log admin notification (chargeback the app can't reconcile
  is never silent). Reason strings truncated on rune boundaries (valid UTF-8).
  Stale at-most-once comment corrected; revertTillSaleGiftCardFunding
  duplication noted.

Sweep/mock parity:
- Mock CreatePayment dedup is now source-aware (IDEMPOTENCY_KEY_REUSED on
  source mismatch) matching ReplayPaymentByKey and real Square.
- COMPLETED-but-never-polled terminal till-sale checkouts are now recorded by
  the sweep (previously only booking checkouts were; till charges were
  invisible until the 24h blind-fail WARN).
- Legacy snapshot-less minimal-body replay, SQUARE_LOCATION_ID drift, and
  in-memory-mock-restart limitations documented.

Docs:
- Webhook path corrected everywhere (/webhooks/square, not /api/webhooks/square
  - a deployer following the old path would 404 and silently lose all webhook
  reconciliation).
- 2FA enforcement semantics + code-delivery mechanism documented accurately
  (fail-closed default; log-delivery channel; disable re-verification).
- README/User Manual note the 2FA requirement on online saved-card payments.

Tests: 2,151 (up from 2,142). Backend 26/27 packages green (crussell/db fails
only in this environment: local postgres doesn't offer scram-sha-256 for the
test role; package is byte-identical to HEAD and untouched here). Frontend
builds; svelte-check 0 errors.
2026-08-22 00:34:49 +01:00
popertots e9b0f0f2a7 fix: review-loop hardening — identical-body replay, 2FA gates, webhook at-least-once, GDPR scrub
Follow-up to the comprehensive payment-system review. Fixes the issues the
review found in the initial integration, plus the rough edges it introduced.

Money-safety:
- Replay-by-key now replays the FULL original request verbatim from a stored
  square_request_snapshot, so a retained idempotency key returns the original
  payment instead of IDEMPOTENCY_KEY_REUSED (previously the row sat pending
  forever). IDEMPOTENCY_KEY_REUSED remains ambiguous (never proof of no charge).
- Dev mock mirrors real Square for unknown-key replays: ccof: saved-card
  sources are charged and rescued; spent cnon: nonces surface
  ErrReplayKeyNotRetained. (Fixes dev/prod parity divergence.)
- Webhook dedup row committed AFTER dispatch (at-least-once); FAILED till sales
  claw back gift-card funding; event-type strings match Square's real catalog.
- Expired-gift-card cancellation refunds set creditFailed (never a phantom
  'completed' refund); cancellation refunds lock all payment rows ascending.
- Sweep never rescue-completes a gift-card purchase without delivering the card.
- Tip no-client-key fallback is a deterministic count-based key under the
  booking advisory lock (retry-safe, distinct tips don't collapse).
- M-cap subtracts completed refunds, clamped to [0, total].

2FA (PSD2 SCA stand-in) for online saved-card payments:
- Full feature: status/setup/verify/disable endpoints, gating helper wired into
  all 7 saved-card charge paths (incl. BuyGiftCard + admin saved-card), account
  admin-tab settings UI, frontend gating across all payment surfaces.
- Enforcement is FAIL-CLOSED: on unless REQUIRE_2FA=false or an explicit
  mock/dev SQUARE_ENVIRONMENT; startup warning when off in a non-dev env.
- Verify is brute-force hardened (5-attempt lockout, timing-safe compare);
  plaintext codes only logged when enforcement is off (dev).
- GDPR: anonymize_user also scrubs 2FA columns and staff notes.

Infra/docs:
- nginx: /api/ response cache removed (cross-user disclosure); port 80
  redirects to HTTPS (localhost/RFC1918 exempt, end-anchored regexes); HSTS;
  separate webhook rate-limit zone.
- Schema: users 2FA columns; payments/till_sales square_source_id +
  square_request_snapshot.
- Legal docs: gift-card cooling-off, international-transfers section, tips
  policy; Gap Backlog P3 webhooks marked done; stale counts/wording corrected.
- Flaky test race fixed (t.Parallel + global mock mutation); suite 26/26
  packages green, 2,142 tests, svelte-check clean.
2026-08-22 00:34:49 +01:00
popertots 4b28e93710 fix: tip double-count, fully-paid auto-completion, discount-refund hardening
Tip double-count (root cause of £33.75 vs £28.75 display):
- Remove mock's fixed +500p auto-tip when AllowTipping is true (square_dev.go) —
  real Square only enables a terminal prompt, it never adds a tip to the amount
- Set AllowTipping=false in CreateTerminalPayment: the frontend already embeds
  the tip in the amount, so the terminal must not prompt for a second tip
- M4 tip split now derives the tip as charged amount minus remaining booking
  value ('after 100% is tips'), not from Square's TipAmount field
- Success screens divide paymentResult.amount by 100 (pence -> pounds) in both
  PaymentModal and UserPaymentModal

Fully-paid bookings auto-complete:
- Extract ApplyBookingCompletionSideEffects into payments package (shared by
  admin progress endpoint and payment paths; avoids circular import)
- Add bookingIsFullyPaid + completeFullyPaidBooking: when completed non-tip
  payments reach 100% of the booking total, an active booking transitions to
  'completed' so it leaves the admin Current Appointment view
- Wired into CreateBookingPayment (inside tx) and GetCheckoutStatus (terminal,
  after commit); completion side-effects (loyalty, campaigns, deposits_required)
  fire identically to the manual progress endpoint
- Add /admin/bookings/{id}/refund route (AdminRefundBooking)

Discount-refund hardening:
- RefundPayment explicitly rejects discount/on_the_house payments (was relying
  on the incidental NULL-square_payment_id guard)
- Hide the Refund button for discount/on_the_house payments in EditBookingModal
- Cancel-refund estimate in BookingModal also excludes on_the_house
- Cancellation refund loop + GetBookingPaymentInfo + GetBookingRefundableAmountCents
  exclude payment_type='tip' from refundable totals

Tip flow (start-time guard) fixes tests:
- Tip tests updated to use past-dated bookings (tips now require booking started)

Tests:
- m4_tip_refund_redesign_test.go (tip split, refund exclusion, admin refund cap)
- m5_fully_paid_completion_test.go (online + terminal full-payment completion,
  partial stays active, tip excluded, cancelled stays cancelled)
- Full suite passes with -race (25 packages)
2026-08-22 00:34:49 +01:00
popertots 5e3dc9b428 fix: comprehensive payment system hardening (4 review passes)
CRITICAL fixes:
- C1: JWT exp claim now validated via jwtauth.VerifyToken (was Decode)
- C2: OverrideAmount validated post-substitution (prevents negative money minting)
- C3: Terminal gift-card payments store gift_card_id; refund credits user balance
- C4: Refund dedup returns stored amount, not req.Amount (prevents admin mislead)
- C5: Booking recheck uses FOR UPDATE (prevents TOCTOU with cancellation)
- C6: processChargeGroup idempotency key stable (charge-only, prevents double-refund)

MAJOR fixes:
- M2: Gift-card refund UPDATE checks RowsAffected; 0 rows -> failed
- M3: ProcessCancellationRefund returns commit error (was swallowed)
- M5: Dispute webhook handling (created + state.updated + disputes table)

MEDIUM fixes:
- ME1: CORS restricted to FRONTEND_ORIGIN env var (was reflect-any)
- ME2: anonymize_user() scrubs users.notes, bookings.notes, name_history, refresh_tokens
- ME3: Webhook handlers now mutate state (payment.updated, refund.updated)

Frontend fixes:
- Same-key retry on 503 (ambiguous failure) wired to all 8 payment flows
- CHARGE_AND_STORE intent for save-card flows (SCA compliance)
- Nonce staleness check verified across all flows

Additional fixes from adversarial re-review:
- F1: Till-sale completed dedup echoes stored amount (C4-class)
- F2: Cash/giftcard terminal path uses FOR UPDATE (C5-class)
- F3: Square-success UPDATE checks RowsAffected (till sales)
- F4: Dispute reason truncated to 192 chars (prevents INSERT failure)
- F5: Booking-user lookup failure marks refund failed (prevents silent money loss)
- F6: Saved-card/tip rechecks wrapped in transaction (C5 residual)

Tests:
- 15 adversarial attack tests (negative override, zero override, terminal gift card,
  refund dedup, TOCTOU, deleted gift card, advisory lock, overcharge, zero/negative/huge
  amount, raw PAN, missing auth, gift card balance, concurrent refunds)
- 14 webhook state tests (dispute created/state, payment/refund updated)
- 3 CORS tests, 3 GDPR tests, 1 HTTP timeout test
- Full suite passes with -race (25 packages, 0 failures)

25 files changed, +1532/-275 lines
2026-08-22 00:34:49 +01:00
popertots d9c2c5ac2c Schema: purge ALTERs per pre-launch recreate policy; nullable account_id for unredeemed gift-card expiries
The project is pre-launch with no production DB — all dev starts from a fresh
volume recreated from init-scripts/init-script.sql. All ALTER statements are
removed and their effects expressed directly in the CREATE statements:
name_history now lives after bookings with its booking_id FK inlined (no
ALTER TABLE ADD CONSTRAINT), the critical_payment_log enum value is in the
CREATE TYPE (no ALTER TYPE ADD VALUE), and voucher_type_at_purchase is in the
CREATE TABLE gift_cards (no ADD COLUMN).

gift_card_expired_balances.account_id is now nullable: CleanupExpiredGiftCards
inserts NULL for unredeemed gift cards (bought for non-account-holders, never
claimed) — a NOT NULL column made that expiry fail at runtime. The three tests
that papered over this with ALTER TABLE DROP NOT NULL now rely on the schema
directly.
2026-08-22 00:34:49 +01:00
popertots 3f6250ea81 Remove dead acquireAdvisoryXactLock try variant
The transaction-scoped TRY variant had no production callers — only the
conn-level try-lock (acquireAdvisoryLock) and the blocking xact variant
(acquireAdvisoryXactLockBlocking, used by the admin cancellation path) are in
use. Dropping the dead code removes a foot-gun: a try-lock that silently
fails to acquire inside a transaction would otherwise look like a safe option.
2026-08-22 00:34:49 +01:00
popertots 2b4c50b4b0 Block guest-role tokens from online payment routes (RequireNonGuest middleware)
Guests (account_role='guest') have no login flow and never receive a JWT
normally, so this is defense-in-depth: any token whose role claim is 'guest'
(forged/minted guest tokens or future changes) is refused 403 before the money
handlers run. The check reads role from context ONLY — real guests are seeded
with account_type='email', so account_type is never the discriminator. A
missing role passes through (RequireAuth guarantees presence; same trust model
as isVerifiedRole).

Wired onto all user-facing money routes: booking payment, apply-redemption,
payment-lock POST/DELETE, tip, gift-card redeem and gift-card buy. Admin and
till routes (RequireAdmin) are untouched — admin can never be guest. The
payment-methods routes gain RequireVerified (verified_email, admin) alongside,
so only verified accounts can manage saved cards.

Tests: 6 middleware tests (reject guest, allow verified/unverified/admin/
affiliate/missing-role) + 4 integration tests (guest 403 on booking payment
with zero side effects, tip, gift-card buy; verified user still pays 200).
2026-08-22 00:34:49 +01:00
popertots 858ae87e9c Block card saving for unverified accounts at the charge-handler level
Only verified accounts (account_role in 'verified_email','admin') may save
cards. CreateBookingPayment, CreateTipPayment and BuyGiftCard now reject
save_card=true for guests, unverified accounts and affiliates with 403 BEFORE
charge-source resolution, the pending-payment insert, or any Square call —
failing closed with zero side effects. Unverified users may still pay; only
card persistence is blocked. The dedicated save endpoints are additionally
protected by mw.RequireVerified middleware on the routes (main.go).

isVerifiedRole / rejectSaveCardForUnverified mirror the existing isAdminRequest
defense-in-depth pattern. Tests cover: unverified save-card 403 with no payment
row, verified save-card succeeds, and unverified pay-without-save succeeds.
2026-08-22 00:34:49 +01:00
popertots bb843fe7dd Till-sale: resolve pending top-ups by gift card to reuse stored idempotency key
A lost-response retry carrying a fresh or absent idempotency key (an old
frontend, or a key regenerated for a changed cart) now reuses the pending
till_sale row by resolving the gift card itself and adopts the row's STORED
key — so Square dedups the retry against the original charge and the card is
never funded twice. An amount mismatch proves a genuinely different sale (same
card, new amount) and leaves the pending row untouched. 'create' actions carry
no gift-card id and continue to rely on the client-supplied key cached per
cart line in the till frontend.
2026-08-22 00:34:49 +01:00
popertots 39d914417f Sweep lost-response charges by idempotency-key replay (22h cutoff, rescue/fail/WARN)
The stale-pending sweep now runs two passes. Pass 1 (22h cutoff — deliberately
2h earlier than the 24h legacy cutoff) targets pending rows with a STORED
idempotency key but NO square_payment_id: the lost-response case, where the
charge may have completed at Square with the response never received. Each row
is reconciled at Square by replaying the key (ReplayPaymentByKey): a COMPLETED
charge is rescued to 'completed' with the real square_payment_id written back,
a charge Square proves never happened is failed (till-sale gift-card clawback
included), an ambiguous answer leaves the row pending for the next run. The
earlier cutoff keeps the replay inside Square's ~24h key-retention window;
replaying at exactly 24h risks an expired key misreading as 'never charged'.

Pass 2 (legacy 24h cutoff) reconciles rows WITH a square_payment_id by payment
id; rows with neither payment id nor stored key (no reconcile possible) are
failed with a WARN that the charge outcome is unknown. Late retries on all
swept rows are rejected (409), preventing a second Square charge.
2026-08-22 00:34:49 +01:00
popertots 197d4c4b9b Gift-card rolling expiry, SvelteDate→Date purge, strict DST tests, UTC scan-location + settings legal floor
Gift-card rolling expiry (setting-driven, was dead config):
- GetGiftCardExpiryMonths(): single source of truth (business_settings
  gift_card_expiry_months, fallback 24) shared by payment handlers and the
  CleanupExpiredGiftCards job (was hardcoded 24).
- expiry_date now maintained on ALL 9 gift-card write sites (buy, topup,
  transfer, redeem, terminal payment, refund credit, till) so the refund-time
  guard at refunds.go actually fires. Schema default 12->24 + migration note;
  test-DB seed aligned. Stale "expiry_date IS NULL" test rewritten; new
  expired-card-rejected regression test.

Frontend SvelteDate purge (docs' stated convention, wide):
- All 180+ raw `new SvelteDate(...)` uses across routes/components replaced
  with parseWallClockDate (backend UTC ISO) or new Date (wall-clock
  constructors). SvelteDate imports removed. timeSlots.ts getDayWithOrdinal
  fixed. Zero SvelteDate references remain; svelte-check clean.

Strict timezone/DST testing + QA fixes:
- 8 new hermetic boundary tests: clock.DST transitions (both 2026 folds),
  closing-hours GMT vs BST, booking date-window midnight, refund-tier
  elapsed-time independence, deposit-window UTC-instant, scheduling
  LondonDateString midnight, today AT TIME ZONE window + UTC round-trip.
- today.go summary date labels fixed to London wall-clock (were showing the
  previous UTC day during BST) + regression test.
- pgx ScanLocation fixed to UTC via AfterConnect (was host-local -> JSON
  offsets depended on deployment TZ, contradicting the documented UTC
  invariant) + regression test. Registered as a new *Type to avoid a data
  race on the shared type map (caught by -race).

Admin Business Settings (setting now functional => legal floor):
- gift_card_expiry_months validation floor raised 1 -> 12 months (CMA/
  Consumer Rights Act 2015 unfair-contract-term guidance) in endpoint + UI,
  with rolling-expiry semantics shown in both display and edit form.
- 3 new expiry validation tests; 2 pre-existing message assertions updated.

Full suite 25/25 + race clean via run-tests.sh lockfile; svelte-check 0
errors/warnings; production build succeeds.
2026-08-22 00:34:49 +01:00
popertots 7f1c649f1e Apply second-round review fixes: idempotency-key length caps, stable-sentinel card keys, test-isolation, naming
Money-safety idempotency hardening (I1, wide):
- validate:"max=45" on CreateTerminalPayment/BookingPayment/Refund/Tip/
  BuyGiftCard idempotency keys (all feed Square's 45-char /v2/payments,
  /v2/refunds, /v2/cards caps); BuyGiftCard corrected from a wrongly-loose
  max=64. Till keeps max=64 (its key also feeds the 64-char terminal-checkout
  endpoint).
- Explicit 45-char guard in RefundPayment: the one handler that decodes
  RefundRequest without running the struct validator, so the tag alone was
  inert; a longer key would 400 at Square and be misclassified as a
  definitive refund decline.
- New TestIdempotencyKey_OverLength_RejectedAcrossPaymentHandlers covers all
  six endpoints (terminal saved-card, booking, tip, gift-card, till, refund).

Stable-sentinel card identity in idempotency keys (C1, wide):
- BookingFlow deposit key now uses the 'new-card' sentinel instead of
  embedding the cnon: nonce (matches UserPaymentModal/account). A re-tokenize
  after a spent nonce no longer regenerates the key, closing a lost-response
  double-charge window.
- TipPayment + UserBookingModal tip keys now include card identity
  (selectedCardId || 'new-card'); previously keyed on amount only, so a
  same-amount tip on a DIFFERENT card reused the key and deduped a distinct
  charge. Resets cleared in every success/close path.

Test isolation (R1): TestRefund_PendingResume_NewKeyAfterModalReopen no
longer t.Parallel — it swaps the package-level SquareClient mid-test and a
concurrent parallel test could observe the swapped instance.

Naming/quality (M1/M2/M4): resolveChargeSource local renamed savedRowID (was
shadowing the cardID *string parameter); BuyGiftCard fallback prefix
"till-" -> "gc-"; saved-card terminal response key "checkout_id" -> "payment_id"
(it holds a DB payment row, not a Square checkout) with matching frontend
fallback. README maintenance-job count corrected 24 -> 25.

Full suite 25/25 + race clean via run-tests.sh lockfile; svelte-check 0
errors/warnings; production build succeeds.
2026-08-22 00:34:49 +01:00
popertots 63226debb7 Revive soft-deleted saved cards in SaveCardForUser upsert (DO NOTHING → DO UPDATE)
A soft-deleted card row (DeletePaymentMethod sets deleted_at) still occupies
the non-partial UNIQUE (user_id, square_card_id) slot. Re-saving the same
physical card via a save_card=true charge hit ON CONFLICT DO NOTHING, got
pgx.ErrNoRows, and the deleted_at IS NULL fallback SELECT also missed the
row → 500. DO UPDATE now revives it (deleted_at/retained_until = NULL),
matching CreatePaymentMethodFromToken's revival semantics; the ErrNoRows
fallback is removed. Regression test: soft-delete then re-save same card id
→ existing row returned, deleted_at cleared.
2026-08-22 00:34:49 +01:00
popertots a8d54f1e2a Fix review findings: aggregated-refund/saved-card/legacy-refund idempotency keys, structured Square error classification, CSP for Square SDK
Money-safety idempotency fixes (external review bugs 1-3):
- processChargeGroup: aggregated refund key now hashes the sorted pending-row
  set (chargeID-square-agg-<sha256 suffix>) so a changed group can never mark
  a new row completed against an old smaller refund; >45-char chargeIDs use a
  hashed prefix instead of verbatim truncation (which would collide charges on
  Square's global key dedup). Same-set crash-retry keeps Square's dedup.
- CreateTerminalPayment saved_card: two-tier idempotency key — client-supplied
  per-attempt UUID preferred (distinct identical charges no longer collapse),
  deterministic booking+type+amount+card fallback for no-key retry safety.
  PaymentModal sends a per-charge UUID cleared after success.
- ensureRefundKey: legacy NULL-key manual refunds persist a generated key to
  the row BEFORE the Square call (race-safe AND idempotency_key IS NULL guard),
  so a lost-response retry reuses the key and never double-refunds. Wired into
  resumeManualPendingRefund and the sweep's manual-retry loop.

Classification + money-safety hardening:
- till.go/sweep.go: structured square.ErrorCode/IsNotFound are authoritative
  when present; message-substring matching only for non-structured errors
  (dev mock, client-side status errors). Fixes fragile string-matching driving
  sweep retries and gift-card clawbacks.
- SaveCardForUser: ON CONFLICT (user_id, square_card_id) DO NOTHING + re-select
  (was a latent UNIQUE-violation 500 on save-card retry).
- CreateBookingPayment: partial payments re-validated against remaining balance
  inside the advisory lock (closes concurrent-overpayment race).
- InvalidateSquareCustomerCache on GDPR erasure paths (account.go,
  time-blockers.go stale-guest anonymization).
- GetUserGiftCardBalanceAdmin: in-handler admin check (defense-in-depth).
- getCheckoutHTTP: warn on multi-payment checkouts instead of dropping
  payments[1:].
- Cash/giftcard terminal branch: removed dead idempotency SELECT, "tip-" ->
  "till-" prefix.
- UserPaymentModal: removed vestigial polling state; proper interval cleanup.
- account/+page.svelte: gift-card redeem dialog links /terms.
- nginx CSP: allow *.squarecdn.com and js.squareup.com so the Square Web
  Payments SDK + card iframe can tokenize behind the proxy.

Tests: +8 regression tests covering changed-set refund keys, legacy NULL-key
single-refund, saved-card client-key dedup/no-dedup, concurrent partials, and
cache invalidation. Full suite + race detector clean via run-tests.sh lockfile.
2026-08-22 00:34:49 +01:00
popertots 726ac8cb65 Harden money-safety re-review findings: nonce-independent idempotency keys, reconciliation-required logging, terminal-state classification
Re-review (2 Oracle + security + QA + librarian + context-miner) surfaced fixes, all applied: (1) UserPaymentModal and the account-page gift-card buy now key the cached idempotency key on a stable 'new-card' sentinel instead of the cnon: nonce, so clearing the nonce on a failed charge no longer regenerates the key — a lost-response retry now dedups at Square instead of double-charging (the tip flows already keyed on amount only). (2) The create-with-redeem clawback now logs CRITICAL when the guarded balance reversal is blocked (previously silent), and its transaction DELETE is scoped to this sale instead of deleting every transaction on the card. (3) reconcileStalePaymentAtSquare now treats APPROVED/PENDING as non-terminal (leave pending) instead of definitively failed, matching Square's documented state machine. (4) GetTillCheckoutStatus returns 404 for a sale already swept to failed instead of reporting a live state. (5) The critical-payment scan job skips candidates whose booking was hard-deleted, so one orphan can no longer silence all critical alerts.
2026-08-22 00:34:49 +01:00
popertots 352f9e50d4 Fix till-sale money safety: sweep gift-card clawback, orphaned-checkout cancel, cash-retry reconciliation
HIGH-1: a till sale whose card-machine checkout is provably dead, or whose Square reconcile proves the charge never landed, now claws back the funded gift card atomically with the failed mark (claim-first gating UPDATE serializes against the admin retry; blind-fail and ambiguous/lost-response rows never claw back, and a bare CANCEL_REQUESTED is not treated as proof of non-completion). HIGH-2: a card-machine checkout created at Square but not committed is cancelled on any pre-commit failure. HIGH-3: a cash/on_the_house retry of a pending card sale is reconciled at Square first (COMPLETED rescues + refuses cash; NOT_FOUND/FAILED/CANCELED allows cash; lost-response forces the card-method retry; ambiguous rejects). GetTillCheckoutStatus no longer resurrects a swept-failed sale, and the cash-completion UPDATE checks RowsAffected so the admin is never told to take cash against an already-resolved sale. 23 new tests covering the clawback matrix, the reconcile-or-reject matrix, cancel-on-error, and a till concurrency test.
2026-08-22 00:34:49 +01:00
popertots 8416f033d6 Fix gift-card transfer deadlock: lock card rows in deterministic ID order
TransferGiftCard locked source-then-destination in caller-chosen order, so concurrent cross-transfers (A→B and B→A) acquired row locks in opposite orders and deadlocked (SQLSTATE 40P01), aborting one transfer with a generic 500. Both rows are now locked in lexicographically sorted ID order (case-insensitive, matching the 12-hex mixed-case card codes), with the scanned values mapped back to source/destination roles afterward. Adds a deterministic concurrency regression test that holds both row locks on dedicated connections to force the AB-BA cycle, proving the old code deadlocks and the new code serializes cleanly.
2026-08-22 00:34:49 +01:00
popertots 5ea89da2ad Make Square webhook dedup restart-safe via database
The in-memory dedup is now only a fast path; the square_webhook_events INSERT ... ON CONFLICT DO NOTHING is the source of truth, so replays across restarts and after FIFO eviction are skipped. A DB failure fails closed with 503 so Square retries. Empty event_ids are rejected with 400 (no dispatch, no dedup row). Ordering trade-off (insert-before-dispatch) documented for when handlers mutate state.
2026-08-22 00:34:49 +01:00
popertots c9d55817f6 Fix data race on shared title-case transformer in profile updates
golang.org/x/text/cases.Caser is not safe for concurrent use, but UpdateProfileHandler shared one package-level instance. A fresh caser is now created per call via titleCase().
2026-08-22 00:34:49 +01:00
popertots f3d50f6990 Complete Square GDPR erasure: customer deletion and stale-guest scrub
Account deletion now snapshots card and customer IDs before the local anonymize transaction and dispatches the Square cleanup goroutine only after the tx commits, deleting each distinct Square customer once and skipping any customer still referenced by another user's card. AnonymizeStaleGuestAccounts also disables cards and deletes the guest's Square customer profile (PII) before NULLing references locally. Token redaction applied to all error logs.
2026-08-22 00:34:49 +01:00
popertots 2a78383a2d Expand payment remediation test coverage
Adds tests for chargeFailureStatus retryable-vs-definitive classification (429/408/425 -> 503, 4xx declines -> 402), legacy NULL-key refund resume, tip/discount split-record math, and the shared charge helpers adopted by till and gift-card paths.
2026-08-22 00:34:49 +01:00
popertots 57bdeb9232 Adopt shared charge helpers in till and gift-card flows; redact card tokens
Till sales and gift-card purchases now use uniqueChargeKey and resolveChargeSource/chargeFailureStatus instead of duplicated inline logic. The saved-card delete path logs the square_card_id through square.TokenPrefix so full ccof references never reach logs.
2026-08-22 00:34:49 +01:00
popertots deb630991e Fix sweep log levels and advisory-lock timer allocation
Downgrades routine sweep bookkeeping from CRITICAL to WARN (genuine post-charge manual-reconciliation branches keep CRITICAL) and replaces the per-attempt time.After in tryAdvisoryLock with a single reusable timer.
2026-08-22 00:34:49 +01:00
popertots e8abf7b4b3 Refactor payment charge paths into shared helpers; classify Square failures
Extracts resolveChargeSource (new-card vs saved-card vs one-off nonce, with Square customer provisioning) and shared advisory-lock + post-charge recheck helpers into charge_helpers.go. Adds errors.go with chargeFailureStatus: transport/5xx/context and 429/408/425 map to 503 (retryable), structured 4xx declines map to 402, used across all four charge paths. Also fixes the no-client-key refund fallback to append a crypto/rand suffix (distinct same-amount partial refunds no longer collide) and adds refundResumeKey so legacy NULL idempotency_key rows resume with a derived key instead of an empty one.
2026-08-22 00:34:49 +01:00
popertots 738f6b6a51 Expand payment test coverage: lock contention, nonce-direct, provisional rows, GDPR scrub, validators
Close the coverage-gap round: terminal CreateCheckout-failure marks the provisional row failed, GetCheckoutStatus reference_id mismatch 400, deadline wire shape, concurrent loyalty redemption 409, delete_guest_user + stale-guest saved-card scrubbing, ValidateAmount and isTokenLike direct units, bounded try-lock timeout, buildSplitRecords tip-overflow, and concurrent same-key dedup for gift card / booking / tip / checkout.
2026-08-22 00:34:49 +01:00
popertots 0d22f8d597 Scrub Square card and customer references on anonymization (GDPR)
anonymize_user, delete_guest_user, and AnonymizeStaleGuestAccounts now NULL square_card_id and square_customer_id on user_saved_cards (7-year retained_until soft-delete kept for financial records). Make square_card_id nullable in the schema. GDPR export refunds join fixed to include gift-card-purchase refunds. Add scrub assertions to the GDPR and stale-guest test suites.
2026-08-22 00:34:49 +01:00