Jakob Wennberg fc7a46c3f2 fix(match-batch): cross-currency allocations + widened tolerance (#607)
* fix(match-batch): cross-currency allocations + widened tolerance

Reported by jakob testing PR #603's MatchAllocationDialog with a SEK
bank tx + a mix of SEK and USD invoices:

1. Tally rendered "1 USD + 1 SEK = 2 kr" — summing different currencies
   as if they were the same.
2. The 0.005 SEK tolerance blocked confirm on any FX rounding delta.

## What changed

**UI (MatchAllocationDialog.tsx)**
- Per-row amount input is explicitly in TRANSACTION currency (SEK for a
  Swedish bank import). Cross-currency rows show an "≈ X.XX (invoice
  currency)" hint under the input so the user can verify the FX result.
- Default amount for a cross-currency allocation is
  `invoice.remaining × invoice.exchange_rate` (booked SEK), so the user
  doesn't have to mental-math the FX.
- Overshoot tolerance widened from 0.005 SEK to `max(1 SEK, 0.5% × tx)`
  so bank-side FX rounding doesn't block confirm. A 2 400 kr tx now
  accepts ~12 kr of tolerance, a 100 kkr transfer accepts 500 kr.

**RPC (match_batch_allocate cross_currency migration)**
- BATCH_CURRENCY_MISMATCH dropped per-allocation. Mixed currencies now
  accepted with the convention that the cross-currency row pays the
  FULL invoice remaining (matches the single-tx match-supplier-invoice
  behavior). Partial cross-currency is out of scope for v1.
- AR/AP line is booked at `invoice.remaining × invoice.exchange_rate`
  (the SEK that was originally on 1510/2440). FX residual is posted
  to 7960 (Valutakursförluster) or 3960 (Valutakursvinster) per BAS.
- Sign conventions per direction documented inline:
    Customer: bank > booked → Cr 3960 (gain); bank < booked → Dr 7960
    Supplier: bank < booked → Cr 3960 (gain); bank > booked → Dr 7960
- New BATCH_FX_RATE_MISSING when the cross-currency invoice has no
  exchange_rate on file (would otherwise silently book at 0).
- New BATCH_FX_DEVIATION_TOO_LARGE when the user-entered amount
  deviates more than 10% from booked SEK — catches typos like "140"
  (USD invoice currency) when they meant "1390" (SEK equivalent)
  without rejecting genuine rate-day FX movement.

RPC patched on remote via Supabase MCP. Same-currency path is
byte-identical to the previous behavior.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(match-batch): PR review — strict sum, bank line = tx_abs, FX validation

Round-1 review fixes on the cross-currency batch allocation flow:

UI (MatchAllocationDialog):
- Tighten tolerance to 0.005 SEK so the "balanced ✓" indicator matches
  what the server will accept. The previous widened tolerance (max 1 SEK
  or 0.5% × tx) created a reconciliation gap where the JE's bank line
  could legitimately disagree with the actual bank receipt.
- Require balanced before confirm — undershoot is now a blocking state
  with an explicit warning, not a silent "leave unallocated".
- Cross-currency default no longer caps at remainingTxBudget. Capping a
  USD invoice's default to the leftover SEK budget could silently
  trigger BATCH_FX_DEVIATION_TOO_LARGE on submit. The user re-balances
  the other rows to fit.
- Add explicit FX-rate validation (bound check 0 < rate < 100000).
- When a cross-currency invoice has no usable exchange_rate on file,
  leave the amount blank and surface a warning instead of guessing.

RPC (match_batch_allocate):
- New code BATCH_AMOUNT_BELOW_TX. Strict sum check on both sides means
  the server can't be coaxed by a direct API caller into the same
  broken state the UI now blocks.
- Bank line credit/debit = v_tx_abs (the actual bank movement) instead
  of sum-of-allocations. Same value within rounding under the strict
  sum check, but it makes intent legible and lets per-row FX diff lines
  absorb rounding.
- Defense-in-depth company_id filter on all re-queries / UPDATEs in
  the line-build + payment-row passes.
- Drop the v_booked_sek-aliasing-for-invoice.total foot-gun. Use a
  dedicated v_inv_total var.
- Truncate invoice_number to 32 chars in line_description.

Tests:
- pg-real: cross-currency happy path (USD invoice paid by SEK tx with
  FX loss to 7960, bank line = tx_abs).
- pg-real: BATCH_AMOUNT_BELOW_TX rejection on undershoot.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(match-batch): PR review round 2 - caller user_id verification + FX bound

Compliance-swarm + swedish-compliance findings on round 1:

- CC6.3 (HIGH): p_user_id was caller-supplied and written into
  journal_entries.user_id / payment-row user_id without verifying it
  equals auth.uid(). Membership covered the company; nothing covered
  the user attribution. Two-layer fix: explicit guard rejects when
  p_user_id <> auth.uid(), and all writes now resolve v_caller =
  auth.uid() directly so the guard cant be silently bypassed.
- A.8.28 (MED): server-side FX upper-bound (0 < rate < 100000) matches
  the UI. Previously RPC only checked > 0, allowing the UI guard to
  diverge.
- V1.2.5 (LOW): truncate v_tx.date when concatenated into
  line_description (defense alongside round 1s invoice_number trunc).
- Symmetry: populate supplier_invoice_payments.exchange_rate (column
  existed, INSERT omitted it). Customer side already populated. Matches
  swedish-compliances traceability note on AP rorelseskulder.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(match-batch): PR review round 3 - drop p_user_id, CHECK constraints, payment-day rate

Genuine round-2 review findings (compliance-swarm + swedish-compliance):

- V4.5: p_user_id dropped from RPC signature entirely. Round-2 added a
  guard; this removes the attack surface at the API boundary. Caller is
  resolved via auth.uid() inside the function. Route updated.
- V2.2: CHECK constraint on invoices.exchange_rate and
  supplier_invoices.exchange_rate (0 < rate < 100000). Three layers now
  enforce the bound: schema, RPC, UI.
- swedish-compliance traceability gap: payment_exchange_rate column on
  both invoice_payments and supplier_invoice_payments. Populated as
  v_alloc_amount / v_inv_remaining for cross-currency rows so FX diffs
  are reconstructible from the payment record alone (BFL 7 kap
  behandlingshistorik). NULL for same-currency. The existing
  exchange_rate column continues to store the invoicing rate.
- CC6.1: extract isValidExchangeRate() to lib/utils.ts. UI's three
  inline bound checks now share one validator.
- Dead code: drop unused leftover_note i18n key (sv + en).

Tests:
- pg-real signature updated (4-arg -> 3-arg) across all 9 call sites.
- Added payment_exchange_rate assertion to cross-currency happy path
  (invoicing rate 10.0 stays, payment-day rate stored as 10.5).

Migration applied to remote.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(test): missed 4th arg in BATCH_UNAUTHORIZED pg-real test

Round-3 dropped p_user_id from match_batch_allocate. The replace_all
caught the userId/companyId pattern but missed the BATCH_UNAUTHORIZED
test which uses outsiderId instead of userId. CI failed with
"bind message supplies 4 parameters, but prepared statement requires 3".

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-29 16:30:42 +02:00
2026-05-28 15:43:48 +02:00
2026-05-28 15:43:48 +02:00
2026-05-06 11:12:02 +02:00
2026-04-22 15:33:04 +02:00
2026-05-28 15:43:48 +02:00
2026-05-22 12:22:15 +02:00

gnubok

Open-source Swedish accounting software for sole traders (enskild firma) and limited companies (aktiebolag).

License: AGPL-3.0-or-later

What is gnubok?

gnubok implements double-entry bookkeeping compliant with Swedish accounting law (Bokforingslagen). It supports the BAS 2026 chart of accounts, handles VAT declarations (momsdeklaration), SIE import/export, and enforces 7-year document retention. Built for sole traders and limited companies operating in Sweden.

Features

  • Double-entry bookkeeping -- BAS 2026 chart of accounts, draft/commit workflow, sequential voucher numbering
  • Invoicing -- Create, send, and track invoices with mixed VAT rates and PDF generation
  • Bank reconciliation -- PSD2 bank connection via Enable Banking, 4-pass automatic matching
  • VAT declaration -- SKV 4700 form mapping, per-rate breakdown, EU/export handling
  • Tax reports -- NE-bilaga, INK2, SRU export for Skatteverket
  • Supplier invoices -- Registration, payment tracking, input VAT deduction
  • Document archive -- SHA-256 integrity, 7-year retention enforcement, full archive ZIP export
  • SIE import/export -- Standard Swedish accounting interchange format
  • Extension system -- Opt-in plugins for AI categorization, receipt OCR, email, calendar, and more

Self-Hosting

git clone https://github.com/erp-mafia/gnubok.git
cd gnubok
./setup.sh              # Prompts for Supabase credentials, generates .env
docker compose up -d

You need a Supabase project and must apply the database migrations before first use. See SELF-HOSTING.md for the full step-by-step guide, including Supabase setup, auth configuration, optional features (AI, email, push notifications), and troubleshooting.

Development Setup

Prerequisites: Node.js 20+, a Supabase project.

npm install
npm run dev       # Start dev server (auto-generates extension registry)
npm test          # Run tests
npm run build     # Production build
npm run lint      # ESLint

Tech Stack

  • Framework: Next.js 16 (App Router), React 19, TypeScript (strict)
  • Database: Supabase (PostgreSQL + Row Level Security + email/password auth + TOTP MFA)
  • Styling: Tailwind CSS 4 + shadcn/ui
  • Integrations: Enable Banking (PSD2), Anthropic SDK, LangChain, OpenAI, Resend, JSZip

Documentation

  • SELF-HOSTING.md -- Full self-hosting guide (Docker, Supabase setup, migrations, optional features)
  • CLAUDE.md -- Architecture, bookkeeping engine, database conventions, extension system
  • CONTRIBUTING.md -- Development workflow, code style, pull request process
  • SECURITY.md -- Vulnerability reporting policy

Contributing

Contributions are welcome. See CONTRIBUTING.md for the full guide.

All commits require a DCO sign-off (git commit -s).

License

AGPL-3.0-or-later with an extension exception: third-party extensions that interact solely through the documented Extension API may be licensed under any terms, including proprietary. See LICENSE for details and NOTICE for third-party attributions.

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Accounted — svensk bokföringsmotor (AGPL, BAS 2026, BFL-compliant, 150+ MCP tools). Finance-kapacitet brevet ERPNext. ADR-ENGAGEMENT-001-tillägg.
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