davideandClaude Opus 5
23d58796b6
fee_address has no column default, because an operator has to supply their own — and the payout pays the 30% commission to it, so build_payout_transaction cannot even be built without one. A fresh instance nonetheless opened rounds happily: each took bets, confirmed them, and only then discovered it was unpayable, wedging in "paying_out" and retrying every 60s with money already in the pool. One manual recovery per round, until somebody noticed. open_new_round_if_needed now checks rounds_can_open(config) alongside `paused`: no payout address, no round. Nothing has moved yet at that point, which is the whole difference. Same scope as pausing — a round already in progress still closes, draws and pays out, since clearing the address mid-round is exactly the operator slip that must not strand a live round. Surfaced rather than silent, in the two places that matter: lottery_configured on GET /rounds/current, which makes / show a *different* banner from the maintenance one (telling a player "come back later" would be false — nothing is coming until setup finishes), and a warning at the top of /admin's Parametri card, the one screen that can fix it. rounds_can_open is where any future would-make-a-round-unpayable prerequisite belongs, instead of being discovered at payout time. The test churn is the finding restated: 26 tests expected a round to open on an instance with no payout address. Their fixtures now seed one, so each goes back to testing what it says — several would otherwise have passed for the wrong reason, returning None because of the missing address rather than because of the cooldown or pause under test. Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
PLM Lottery
A periodic-round lottery system built on PLM, a Bitcoin-like coin (mainnet). Each user gets a dedicated server-derived P2WPKH address; they deposit PLM to that address, place a fixed-cost bet to enter the current round, and when the round closes a winner is drawn who receives 70% of the prize pool (the remaining 30% goes to fees).
This is a custodial system: private keys are generated and held server-side, encrypted at rest. See CLAUDE.md for the full architecture, domain decisions, and known gaps before treating this as production-ready.
Quick start
The server always runs via Docker (app + Caddy reverse proxy with automatic
TLS) — in dev and production alike, with only SITE_ADDRESS differing
between the two. There's no supported way to run uvicorn directly; the
venv is only for local tooling (tests, Alembic migrations, the one-time key
scripts) — see CLAUDE.md.
cp .env.example .env # then fill in the generated secrets, see docs/setup.md
mkdir -p data/db data/keys data/logs
docker compose run --rm app python scripts/generate_master_key.py
docker compose up -d --build
Open https://localhost/ for the test UI, https://localhost/admin for the
admin dashboard (a self-signed-certificate warning on first visit is
expected in dev — accept it, or use curl -k). The interactive API docs at
/docs are disabled by default (they'd otherwise expose the whole API
surface, admin endpoints included) — set ENABLE_API_DOCS=true in .env to
enable them.
See docs/setup.md and docs/running-the-server.md for the full walkthrough (secrets, master key generation, production TLS with a real domain).
Documentation
- CLAUDE.md — architecture, commands, domain decisions, known gaps (for anyone/anything working on the code)
- flowchart.mmd — the source-of-truth flow diagram the implementation follows node-by-node
- docs/setup.md — one-time setup (secrets, master key, migrations)
- docs/running-the-server.md — how to launch it (local venv vs. Docker+Caddy, dev vs. production TLS)
- docs/guida-utente.md — end-user guide to the test UI (Italian)
- docs/guida-admin.md — admin dashboard guide (Italian)
Tech stack
Python (FastAPI, SQLAlchemy async + Alembic, Argon2 + JWT auth), Electrum protocol for PLM network access (no full node), Docker + Caddy for deployment. See CLAUDE.md for the complete list and the reasoning behind each choice.
Testing
python -m pytest # all tests
python -m pytest tests/unit/test_hd.py # one file
232 unit tests cover HD derivation, PSBT building, the Electrum client, bets, deposits, withdrawals, the round/draw engine, RBF fee-bumping, admin config, the pending-inclusive balance calculation, and the SSE push channel. No automated integration tests against a live Electrum connection — mainnet verification so far has been manual (see CLAUDE.md's "Project status").