julian
bfe64032d8
Turborepo (pnpm workspaces) with all dependencies pinned to latest mutually-compatible versions: turbo 2.9, TypeScript 6, Fastify 5, React 19, Vite 8, better-sqlite3 12 + Drizzle ORM 0.45. Layout: - apps/server Fastify backend (local JWT auth + role guard, /health) - apps/web React 19 + Vite 8 operator SPA - packages/db Drizzle schema on SQLite/WAL; append-only events + users - packages/devices reader/printer/relay adapter interfaces (intent-only relay) - packages/shared shared domain types Architecture constraints from the design wiki are encoded in the scaffold: append-only hash-chained + signed event log, device-agnostic adapters, "a barrier is not a door" (relay expresses intent only), fully-local offline-first auth. wiki/ is an LLM-maintained Obsidian knowledge base (28 pages) ingested from the architecture & design notes, with its own maintenance schema. Verified: pnpm install, full turbo build (5/5), server boots and serves /health, drizzle-kit generates the initial migration.
27 lines
1.2 KiB
Markdown
27 lines
1.2 KiB
Markdown
---
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type: concept
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tags: [parking, security, access-control, integrity]
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sources: [parking-system-architecture]
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updated: 2026-06-14
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---
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# Event-Log Ingestion (making the UHPPOTE log trustworthy)
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The host-side discipline that turns the [[uhppote-controller]]'s log — undermined by the
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[[uhppote-udp-protocol]] — into a solid detection/audit layer. (See
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[[parking-system-architecture]] §6.)
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- **Track your own last-ingested index on the host.** Do **not** rely on the controller's
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current-index pointer — it's user-managed and settable by anyone (`set-event-index`).
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- Walk **absolute** indices with `get-event <id>`. Treat three things as **alarms**:
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1. a **gap** in the sequence,
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2. an **"event has been overwritten" error** (you fell behind — data loss),
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3. any **door-open event the host never requested**.
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- Use `set-listener` **auto-push** for low latency, but **always reconcile by index** (UDP
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pushes can drop).
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- **Size polling cadence** against the busiest lane's event rate so unread events never roll off.
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- **Land every event** in the host's signed [[append-only-event-chain]].
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Net result: **tamper-evident, behind [[network-isolation]]** — a solid detection layer, but not
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tamper-proof. Prevention requires the [[esp32-custom-controller]].
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