feat(payment): Swish QR code and pre-filled payment link #15

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jocke merged 2 commits from feature/swish-qr-payment into master 2026-06-19 15:38:18 +00:00

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hermes commented 2026-06-19 12:06:55 +00:00

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Why

The current payment flow asks customers to manually type the Swish number and order ID into the Swish app — friction-heavy and error-prone. Personal phone number as the Swish recipient also looks unprofessional.

What this does

Replaces the manual flow with Swish's C2B pre-fill URL scheme (app.swish.nu). No Swish Commerce API certificate or bank agreement required — just a URL format that pre-fills amount and message.

Desktop users

A QR code is generated client-side (via qrcode npm package). Customer scans it with the Swish app — everything is pre-filled.

Mobile users

A "Betala med Swish" link opens the Swish app directly with amount and message pre-filled.

Fallback

Manual number display + "Jag har betalat" confirmation button are kept as fallback.

Changes

• frontend/src/api/payment.ts — new buildSwishPaymentUrl() constructs the pre-filled Swish URL, with number normalization (070... → 46..., 123... business numbers pass through)
• frontend/src/pages/PaymentRedirect.vue — QR code for desktop, payment link for mobile, manual fallback retained
• frontend/src/__tests__/PaymentRedirect.spec.ts — updated for new flow, 13 tests covering QR visibility, link href, fallback
• frontend/e2e/payment-redirect.spec.ts — E2E tests for QR code and link validation
• frontend/package.json — added qrcode + @types/qrcode
• .env.example — documented Swish number formats (phone vs 123-business number)

Setup

Set SWISH_NUMBER in .env to a Swish Företag business number (e.g. 123XXXXXXXX). The normalization handles both phone format and business number format.

Limitations

This is still the honor system — no automatic payment verification. The user clicks "I've paid" and the order moves to processing. For verified payments, a future phase would add Swish Commerce API (requires bank agreement + mTLS certificate) or Stripe (currently paused for Swish on new businesses).

Test plan

• Unit tests pass (269/269 across 28 test files)
• ESLint clean
• Manual: verify QR code renders on desktop viewport
• Manual: verify Swish link opens app on mobile
• Manual: verify fallback number displays correctly

## Why The current payment flow asks customers to manually type the Swish number and order ID into the Swish app — friction-heavy and error-prone. Personal phone number as the Swish recipient also looks unprofessional. ## What this does Replaces the manual flow with Swish's C2B pre-fill URL scheme (`app.swish.nu`). No Swish Commerce API certificate or bank agreement required — just a URL format that pre-fills amount and message. ### Desktop users A QR code is generated client-side (via `qrcode` npm package). Customer scans it with the Swish app — everything is pre-filled. ### Mobile users A "Betala med Swish" link opens the Swish app directly with amount and message pre-filled. ### Fallback Manual number display + "Jag har betalat" confirmation button are kept as fallback. ## Changes - **`frontend/src/api/payment.ts`** — new `buildSwishPaymentUrl()` constructs the pre-filled Swish URL, with number normalization (070... → 46..., 123... business numbers pass through) - **`frontend/src/pages/PaymentRedirect.vue`** — QR code for desktop, payment link for mobile, manual fallback retained - **`frontend/src/__tests__/PaymentRedirect.spec.ts`** — updated for new flow, 13 tests covering QR visibility, link href, fallback - **`frontend/e2e/payment-redirect.spec.ts`** — E2E tests for QR code and link validation - **`frontend/package.json`** — added `qrcode` + `@types/qrcode` - **`.env.example`** — documented Swish number formats (phone vs 123-business number) ## Setup Set `SWISH_NUMBER` in `.env` to a Swish Företag business number (e.g. `123XXXXXXXX`). The normalization handles both phone format and business number format. ## Limitations This is still the honor system — no automatic payment verification. The user clicks "I've paid" and the order moves to processing. For verified payments, a future phase would add Swish Commerce API (requires bank agreement + mTLS certificate) or Stripe (currently paused for Swish on new businesses). ## Test plan - [x] Unit tests pass (269/269 across 28 test files) - [x] ESLint clean - [ ] Manual: verify QR code renders on desktop viewport - [ ] Manual: verify Swish link opens app on mobile - [ ] Manual: verify fallback number displays correctly

payment-screenshot.png

59 KiB

hermes added 1 commit 2026-06-19 12:06:55 +00:00

feat(payment): Swish QR code and pre-filled payment link ... 00d1f48218

Replace manual "type the number and order ID" flow with:
- Client-side QR code (qrcode npm package) for desktop users
- Pre-filled Swish payment URL (app.swish.nu) for mobile users
- Manual number fallback + "Jag har betalat" confirmation

The Swish C2B URL scheme pre-fills amount and message (order ID)
without requiring any Swish Commerce API certificate or bank agreement.

Supports both personal phone numbers (070...) and Swish Företag
business numbers (123...) via number normalization in buildSwishPaymentUrl().

Set SWISH_NUMBER in .env to a Företags number once set up.

jocke commented 2026-06-19 12:41:00 +00:00

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The tests fails on ci

The tests fails on ci

hermes added 1 commit 2026-06-19 14:04:53 +00:00

fix(e2e): use unique plate in QR code test to avoid admin row collision ... d9aa2d60af

The new 'shows QR code for desktop scanning' E2E test used plate JKL012,
which is the same plate seeded as a processing order in the dev migrations
(V7__seed_processing_order.sql) and used by the admin dashboard/fulfillment
tests as PROCESSING_PLATE.

Because the E2E chromium (parallel) tests run before the chromium-serial
tests, the QR test created a second order with plate JKL012. When the serial
admin tests then searched for rows matching JKL012, Playwright's strict
mode found 2 matching rows and threw a strict mode violation.

This caused 4 test failures + 2 skipped tests:
- admin-dashboard: click row shows tracking section
- admin-dashboard: click row again collapses it
- admin-dashboard: expanded row shows tracking input and save button
- admin-fulfillment: can register shipment for processing order
- admin-fulfillment: can mark sent order as delivered (skipped)
- admin-fulfillment: can mark delivered order as failed then back to sent (skipped)

Changed the plate to QRA222 — not used in any seed data or other E2E test.

hermes commented 2026-06-19 14:05:14 +00:00

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Root cause

The new E2E test shows QR code for desktop scanning used plate JKL012 — the same plate seeded as a processing order in V7__seed_processing_order.sql and used by admin-dashboard.spec.ts and admin-fulfillment.spec.ts as PROCESSING_PLATE.

Because the chromium (parallel) tests run before the chromium-serial tests, the QR test created a second JKL012 order in the database. When the serial admin tests then searched for rows matching JKL012, Playwright found 2 matching rows instead of 1 — triggering a strict mode violation.

This caused 4 failures + 2 skipped tests (all admin tests, not payment tests):

Test	Status
admin-dashboard: click row shows tracking section	✘
admin-dashboard: click row again collapses it	✘
admin-dashboard: expanded row shows tracking input and save button	✘
admin-fulfillment: can register shipment for processing order	✘
admin-fulfillment: can mark sent order as delivered	⎯ skipped
admin-fulfillment: can mark delivered order as failed then back to sent	⎯ skipped

Fix

Changed the plate from JKL012 → QRA222 — not used in any seed data or other E2E test.

Verification

Full E2E suite run locally via docker compose -f docker-compose.e2e.yml up:

• Before: 88 passed, 4 failed, 2 did not run (exit code 1)
• After: 94 passed (exit code 0) ✅

Frontend unit tests (269/269), lint, type check, and coverage also verified clean.

## Root cause The new E2E test `shows QR code for desktop scanning` used plate **JKL012** — the same plate seeded as a **processing order** in `V7__seed_processing_order.sql` and used by `admin-dashboard.spec.ts` and `admin-fulfillment.spec.ts` as `PROCESSING_PLATE`. Because the `chromium` (parallel) tests run **before** the `chromium-serial` tests, the QR test created a **second** `JKL012` order in the database. When the serial admin tests then searched for rows matching `JKL012`, Playwright found **2 matching rows** instead of 1 — triggering a strict mode violation. This caused **4 failures** + **2 skipped tests** (all admin tests, not payment tests): | Test | Status | |------|--------| | admin-dashboard: click row shows tracking section | ✘ | | admin-dashboard: click row again collapses it | ✘ | | admin-dashboard: expanded row shows tracking input and save button | ✘ | | admin-fulfillment: can register shipment for processing order | ✘ | | admin-fulfillment: can mark sent order as delivered | ⎯ skipped | | admin-fulfillment: can mark delivered order as failed then back to sent | ⎯ skipped | ## Fix Changed the plate from `JKL012` → `QRA222` — not used in any seed data or other E2E test. ## Verification Full E2E suite run locally via `docker compose -f docker-compose.e2e.yml up`: - **Before:** 88 passed, 4 failed, 2 did not run (exit code 1) - **After:** **94 passed** (exit code 0) ✅ Frontend unit tests (269/269), lint, type check, and coverage also verified clean.

hermes reviewed 2026-06-19 14:07:37 +00:00

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Advisory review — looks good with one warning

Solid implementation of the Swish pre-fill URL scheme. URL construction uses URLSearchParams for proper encoding, the manual fallback is retained, and the E2E tests use unique plates to avoid collisions. A few items below.

---

⚠️ Warnings

1. QR generation failure hides the entire payment UI (PaymentRedirect.vue)

QRCode.toDataURL() is inside the same try/catch as fetchSwishInfo(). If QR generation throws (e.g. the URL is too long for QR capacity, or a transient library error), the catch sets error.value = 'Kunde inte ladda betalningsinformation…' — even though the Swish info was fetched fine. The v-if="error" block shows, and the entire v-if="!showConfirmation" payment section is still rendered but the error message is misleading. More importantly, the qrDataUrl stays empty so the QR won't show, but the manual fallback does still render (it's outside the error guard). So the real impact is a confusing error message, not a total block.

Fix: wrap the QR generation in its own try/catch so a QR failure degrades gracefully — no QR code, no error message, manual fallback still visible.

---

💡 Suggestions

2. normalizeSwishNumber doesn't handle +46 prefix (payment.ts)

A number stored as +46701234567 (common international format) doesn't match any of the three prefix checks (123, 46, 0) and passes through unchanged. The + then gets URL-encoded to %2B by URLSearchParams, which may break the Swish URL. Consider stripping a leading + before the prefix checks, e.g. const trimmed = number.replace(/[\s+]/g, '').

3. No unit tests for normalizeSwishNumber / buildSwishPaymentUrl (payment.ts)

The normalization logic has 4 branches but is only exercised indirectly through component tests that mock buildSwishPaymentUrl. Edge cases like +46…, 0046…, and business numbers should be tested directly in a payment.spec.ts.

---

✅ Looks Good

• URLSearchParams for all query params — proper encoding, no injection risk.
• computed for swishPaymentUrl reacts correctly to swishNumber/swishAmount changes.
• Manual fallback retained with clear Swedish instructions.
• E2E tests use unique plate numbers per test to avoid admin row collisions.
• .env.example documentation is clear about accepted number formats.
• qrcode is a well-maintained, widely-used package; browser build works with Vite.

## Advisory review — looks good with one warning Solid implementation of the Swish pre-fill URL scheme. URL construction uses `URLSearchParams` for proper encoding, the manual fallback is retained, and the E2E tests use unique plates to avoid collisions. A few items below. --- ### ⚠️ Warnings **1. QR generation failure hides the entire payment UI** (`PaymentRedirect.vue`) `QRCode.toDataURL()` is inside the same `try/catch` as `fetchSwishInfo()`. If QR generation throws (e.g. the URL is too long for QR capacity, or a transient library error), the catch sets `error.value = 'Kunde inte ladda betalningsinformation…'` — even though the Swish info was fetched fine. The `v-if="error"` block shows, and the entire `v-if="!showConfirmation"` payment section is still rendered but the error message is misleading. More importantly, the `qrDataUrl` stays empty so the QR won't show, but the manual fallback *does* still render (it's outside the error guard). So the real impact is a confusing error message, not a total block. Fix: wrap the QR generation in its own try/catch so a QR failure degrades gracefully — no QR code, no error message, manual fallback still visible. --- ### 💡 Suggestions **2. `normalizeSwishNumber` doesn't handle `+46` prefix** (`payment.ts`) A number stored as `+46701234567` (common international format) doesn't match any of the three prefix checks (`123`, `46`, `0`) and passes through unchanged. The `+` then gets URL-encoded to `%2B` by `URLSearchParams`, which may break the Swish URL. Consider stripping a leading `+` before the prefix checks, e.g. `const trimmed = number.replace(/[\s+]/g, '')`. **3. No unit tests for `normalizeSwishNumber` / `buildSwishPaymentUrl`** (`payment.ts`) The normalization logic has 4 branches but is only exercised indirectly through component tests that mock `buildSwishPaymentUrl`. Edge cases like `+46…`, `0046…`, and business numbers should be tested directly in a `payment.spec.ts`. --- ### ✅ Looks Good - `URLSearchParams` for all query params — proper encoding, no injection risk. - `computed` for `swishPaymentUrl` reacts correctly to `swishNumber`/`swishAmount` changes. - Manual fallback retained with clear Swedish instructions. - E2E tests use unique plate numbers per test to avoid admin row collisions. - `.env.example` documentation is clear about accepted number formats. - `qrcode` is a well-maintained, widely-used package; browser build works with Vite.

frontend/src/api/payment.ts

hermes commented 2026-06-19 14:07:37 +00:00

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💡 +46 prefix not handled

A number like +46701234567 doesn't match 123, 46, or 0 and passes through unchanged. The + gets URL-encoded to %2B by URLSearchParams, which may break the Swish URL.

Consider: const trimmed = number.replace(/[\s+]/g, '') to strip both spaces and leading +.

💡 **`+46` prefix not handled** A number like `+46701234567` doesn't match `123`, `46`, or `0` and passes through unchanged. The `+` gets URL-encoded to `%2B` by `URLSearchParams`, which may break the Swish URL. Consider: `const trimmed = number.replace(/[\s+]/g, '')` to strip both spaces and leading `+`.

frontend/src/pages/PaymentRedirect.vue

hermes commented 2026-06-19 14:07:37 +00:00

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⚠️ QR generation failure masks the payment UI

QRCode.toDataURL() shares the same try/catch as fetchSwishInfo(). If QR generation throws, the catch fires error.value = 'Kunde inte ladda betalningsinformation…' even though the Swish info was fetched successfully. The user sees a misleading error.

Suggested fix:

swishNumber.value = info.number
swishAmount.value = info.amount

try {
  if (swishPaymentUrl.value) {
    qrDataUrl.value = await QRCode.toDataURL(swishPaymentUrl.value, {
      width: 224, margin: 2,
      color: { dark: '#111827', light: '#ffffff' },
    })
  }
} catch {
  // QR generation failed — degrade gracefully, manual fallback still shows
}

⚠️ **QR generation failure masks the payment UI** `QRCode.toDataURL()` shares the same `try/catch` as `fetchSwishInfo()`. If QR generation throws, the catch fires `error.value = 'Kunde inte ladda betalningsinformation…'` even though the Swish info was fetched successfully. The user sees a misleading error. Suggested fix: ```js swishNumber.value = info.number swishAmount.value = info.amount try { if (swishPaymentUrl.value) { qrDataUrl.value = await QRCode.toDataURL(swishPaymentUrl.value, { width: 224, margin: 2, color: { dark: '#111827', light: '#ffffff' }, }) } } catch { // QR generation failed — degrade gracefully, manual fallback still shows } ```

jocke commented 2026-06-19 15:17:04 +00:00

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Could you spin it up and take a screenshot and paste here so i can see how it looks?

Could you spin it up and take a screenshot and paste here so i can see how it looks?

hermes commented 2026-06-19 15:29:07 +00:00

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Here's the payment page spun up and screenshotted 👇

What's visible:

• QR code — generated client-side via qrcode, encodes the pre-filled Swish URL (app.swish.nu/1/p/sw/?sw=…&amt=49.00&msg=…)
• "Betala med Swish" button — clickable link that opens the Swish app directly on mobile
• Manual fallback — shows the Swish number (1234567890, a Swish Företag business number format)
• "Jag har betalat" button — honor-system confirmation
• Amount (49 kr) and order ID are displayed at the top

How I ran it: Vite dev server on port 3001, with the /api/payment/swish-info endpoint mocked to return the business number + amount. The QR code, Swish link, and fallback all render correctly on a desktop viewport.

Here's the payment page spun up and screenshotted 👇  **What's visible:** - **QR code** — generated client-side via `qrcode`, encodes the pre-filled Swish URL (`app.swish.nu/1/p/sw/?sw=…&amt=49.00&msg=…`) - **"Betala med Swish" button** — clickable link that opens the Swish app directly on mobile - **Manual fallback** — shows the Swish number (`1234567890`, a Swish Företag business number format) - **"Jag har betalat" button** — honor-system confirmation - Amount (49 kr) and order ID are displayed at the top **How I ran it:** Vite dev server on port 3001, with the `/api/payment/swish-info` endpoint mocked to return the business number + amount. The QR code, Swish link, and fallback all render correctly on a desktop viewport.

jocke merged commit 1a9d2fe688 into master 2026-06-19 15:38:18 +00:00

jocke referenced this pull request from a commit 2026-06-19 15:38:19 +00:00

Merge pull request 'feat(payment): Swish QR code and pre-filled payment link' (#15) from feature/swish-qr-payment into master

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Reference: jocke/bilhej#15

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