davideandClaude Sonnet 5.5
ca50ef62f3
A header only had to meet the target it declared for itself, so a fabricated one with `bits = 0x207fffff` passed half the time, a jump of several blocks was accepted without being linked to the tip (a fake header at a huge height locked `tip_height` and froze every draw), and an ordinary one-block reorganisation closed the session on every server. - draw.py: MAINNET_POW_LIMIT (00000000ffff...ffff); header_meets_its_own_target also refuses a claimed target easier than POW_LIMIT. - ElectrumListener._apply_header is async and takes the active client. A single block must chain by prev_hash; a jump downloads the headers in between (blockchain.block.headers, at most 2016 per request, ElectrumClient.get_block_headers) and each must carry valid work and chain, otherwise HeaderValidationError ends the session. - The listener keeps the last 10 headers (`_window`), built from the process's first header and its 9 predecessors (which must chain into it). A header that does not join the tip is walked back to its fork point inside the window and the server's branch is followed instead of ending the session; a fork older than the window, or a branch that does not end at the announced header, still ends it. The audit row and the pause for deep reorgs are B-85; a competing header at the tip's own height is still ignored until then. - _header_at also serves older heights from the window. Tests changed because the spec changed: the mainnet powLimit cannot be mined in a test, so tests/unit/conftest.py swaps in a regtest limit at import time (the new tests put the real one back); the _apply_header tests are async; the two _run_once tests serve the first header's 9 predecessors; test_apply_header_skips_linkage_check_across_a_height_gap is replaced by the jump tests, since that behaviour is exactly what the finding removed. Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
70 lines
3.5 KiB
Markdown
70 lines
3.5 KiB
Markdown
# PLM Lottery
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A periodic-round lottery system built on PLM, a Bitcoin-like coin (mainnet).
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Each user gets a dedicated server-derived P2WPKH address; they deposit PLM to
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that address, place a fixed-cost bet to enter the current round, and when the
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round closes a winner is drawn who receives 70% of the prize pool (the
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remaining 30% goes to fees).
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This is a **custodial** system: private keys are generated and held
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server-side, encrypted at rest. See [CLAUDE.md](CLAUDE.md) for the full
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architecture, domain decisions, and known gaps before treating this as
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production-ready.
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## Quick start
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The server always runs via Docker (app + Caddy reverse proxy with automatic
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TLS) — in dev and production alike, with only `SITE_ADDRESS` differing
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between the two. There's no supported way to run `uvicorn` directly; the
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venv is only for local tooling (tests, Alembic migrations, the one-time key
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scripts) — see [CLAUDE.md](CLAUDE.md#commands).
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```bash
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cp .env.example .env # then fill in the generated secrets, see docs/setup.md
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mkdir -p data/db data/keys data/logs
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docker compose run --rm app python scripts/generate_master_key.py
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docker compose up -d --build
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```
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Open `https://localhost/` for the test UI, `https://localhost/admin` for the
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admin dashboard (a self-signed-certificate warning on first visit is
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expected in dev — accept it, or use `curl -k`). The interactive API docs at
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`/docs` are disabled by default (they'd otherwise expose the whole API
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surface, admin endpoints included) — set `ENABLE_API_DOCS=true` in `.env` to
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enable them.
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See [docs/setup.md](docs/setup.md) and
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[docs/running-the-server.md](docs/running-the-server.md) for the full
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walkthrough (secrets, master key generation, production TLS with a real
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domain).
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## Documentation
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- [CLAUDE.md](CLAUDE.md) — architecture, commands, domain decisions, known gaps (for anyone/anything working on the code)
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- [docs/README.md](docs/README.md) — **index of all documentation** (docs-first, single source of truth, one ADR per decision: [docs/adr/](docs/adr/README.md))
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- [docs/come-funziona.md](docs/come-funziona.md) — the specification (Italian): how the platform works, with diagrams and traceable requirement IDs; it indexes every per-topic document (flows, architecture, data model, API, security, audit log, operations, decisions and limits, bug history). [docs/processo-di-modifica.md](docs/processo-di-modifica.md) describes how a change goes from the spec to the code
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- [docs/setup.md](docs/setup.md) — one-time setup (secrets, master key, migrations)
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- [docs/running-the-server.md](docs/running-the-server.md) — how to launch it with Docker+Caddy (dev vs. production TLS)
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- [docs/guida-utente.md](docs/guida-utente.md) — end-user guide to the test UI (Italian)
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- [docs/guida-admin.md](docs/guida-admin.md) — admin dashboard guide (Italian)
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## Tech stack
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Python (FastAPI, SQLAlchemy async + Alembic, Argon2 + JWT auth), Electrum
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protocol for PLM network access (no full node), Docker + Caddy for
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deployment. See [CLAUDE.md](CLAUDE.md#tech-stack) for the complete list
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and the reasoning behind each choice.
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## Testing
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```bash
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python -m pytest # all tests
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python -m pytest tests/unit/test_hd.py # one file
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```
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570 unit tests cover HD derivation, PSBT building, the Electrum client, bets,
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deposits, withdrawals, the round/draw engine, RBF fee-bumping, admin config,
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the pending-inclusive balance calculation, and the SSE push channel. No
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automated integration tests against a live Electrum connection — mainnet
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verification so far has been manual (see CLAUDE.md's "Project status").
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