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OpenFUT-Core/README.md
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fix(matches): close the second, unguarded match-economy authority
`POST /matches/result` granted coins, XP, level-ups, statistics, four objective
metrics, loan expiry, season progression and achievements across a dozen
SEPARATE writes with no transaction and no idempotency key. Every call
re-credited the same match, and any mid-way failure half-applied it. It sat
beside `/matches/complete`, so nothing stopped one match being paid twice
through two different doors.

It cannot be made exactly-once in place: that needs a caller-supplied match
identity, and this request shape has none. Deriving one from the body would
collapse two legitimate matches with the same scoreline into one — the
under-credit trap already documented for the `fp:` fallback. So the route fails
closed: it rejects with a message naming `/matches/complete`, rather than 404,
so a caller learns why.

The behaviour it uniquely drove is kept, not deleted. `process_match` was the
ONLY caller of loan expiry and Core's season model, so both move into
`complete_match`'s transaction behind opt-in `expire_loans` / `advance_season`
flags. Both default OFF, which keeps the FIFA 17 retail path byte-identical:
FIFA 17 has its own loan and Seasons models, and Core's season END GRANTS coins
and a pack — invisible economy on a path that never asked for it. Their pooled
implementations are replaced by `expire_loans_tx` and
`season::record_match_tx`, so a loan that expires or a season that ends commits
with the match that caused it.

Notifications (level-up / objective / loan / season) were pooled side effects of
the removed path. They now emit from the route AFTER the commit — never inside
the transaction, since a failed notification must not roll back a completed
match — and only when `applied`, so a replay no longer re-notifies. The pooled
path had no replay concept and notified every time.

Also fixes a real bug this surfaced: `/auth/reset` never deleted
`match_completions`, which carries un-cascaded foreign keys to BOTH `matches`
and `profiles`. Any profile that completed a match through the authoritative
route — i.e. every FIFA 17 profile after a retail match — failed to reset with a
database error. It is now deleted first, and ordering is documented.

Tests: the 20 integration call sites move to the authoritative route through one
helper that mints a per-call identity (each call IS a distinct match). New
coverage for the closed path: it rejects without moving the balance or writing
history; Core progression stays off unless opted into; a replay does not
duplicate notifications; and a profile that completed matches can still be
reset.
2026-08-21 04:47:57 +00:00

137 lines
3.7 KiB
Markdown

# OpenFUT Core
**Offline Ultimate Team backend — game-independent.**
OpenFUT Core is the heart of the OpenFUT project: a fully offline, single-player FUT-style backend written in Rust. It is deliberately decoupled from any specific game, though it is designed to power a FIFA 23 offline experience.
---
## What it does
- Creates and manages local player profiles and clubs
- Manages coins, XP, and progression
- Generates packs from weighted JSON definitions
- Tracks your full card collection
- Squad builder with formations and chemistry (chemistry calculations: WIP)
- Objectives engine (daily, weekly, lifetime, milestone)
- SBC (Squad Building Challenge) engine with JSON-defined challenges
- Match result processing with coin and XP rewards
- NPC transfer market with daily refreshes
- Statistics tracking
- Fully moddable via JSON data files
---
## Tech Stack
- **Rust** + **Axum** (HTTP framework)
- **Tokio** (async runtime)
- **SQLite** + **SQLx** (database + migrations)
- **Serde** (JSON data layer)
- **tower-http** (middleware: CORS, tracing)
---
## Quick Start
```bash
# Build
cargo build --release
# Run (creates openfut.db in current directory)
./target/release/openfut-core
# Or with custom config
DATABASE_URL=sqlite://./myclub.db LISTEN_ADDR=127.0.0.1:8080 ./target/release/openfut-core
```
### Environment Variables
| Variable | Default | Description |
|---|---|---|
| `LISTEN_ADDR` | `127.0.0.1:8080` | Address to listen on |
| `DATABASE_URL` | `sqlite://openfut.db` | SQLite database path |
| `DATA_DIR` | `data` | Path to JSON data files |
---
## API Routes
| Method | Path | Description |
|---|---|---|
| `GET` | `/health` | Health check |
| `POST` | `/auth/local` | Create first-run profile + club |
| `GET` | `/profile` | Get active profile |
| `GET` | `/club` | Get active club with coins |
| `GET` | `/cards` | Browse all card definitions |
| `GET` | `/collection` | Get owned cards |
| `GET` | `/packs` | List unopened packs |
| `POST` | `/packs/open/:pack_id` | Open a pack |
| `GET` | `/squad` | Get active squad |
| `POST` | `/squad` | Save squad |
| `GET` | `/objectives` | List objectives with progress |
| `POST` | `/matches/complete` | Complete a match exactly once + receive rewards |
| `GET` | `/sbc` | List SBC definitions |
| `POST` | `/sbc/submit` | Submit SBC solution |
| `GET` | `/market` | Browse NPC transfer market |
| `POST` | `/market/buy` | Buy listing |
| `POST` | `/market/sell` | Quick-sell card |
| `POST` | `/market/refresh` | Refresh NPC listings |
| `GET` | `/statistics` | Get match/pack/SBC stats |
---
## First Run
```bash
# Create your profile
curl -X POST http://localhost:8080/auth/local \
-H 'Content-Type: application/json' \
-d '{"username": "Player 1"}'
# Check your club (5000 coins + a gold pack waiting)
curl http://localhost:8080/club
# Open your starter pack
curl -X POST http://localhost:8080/packs/open/<pack_id>
# Submit a match win. `match_identity` keys exactly-once economy: resubmitting the
# same identity echoes the first result and grants nothing twice.
curl -X POST http://localhost:8080/matches/complete \
-H 'Content-Type: application/json' \
-d '{"match_identity":"match-1","result":"win","squad_id":"any","opponent_name":"Beginner AI","goals_for":3,"goals_against":0,"mode":"squad_battles"}'
```
---
## Modding
All game content lives in `data/`. Drop JSON files into the appropriate folder and restart.
```
data/
cards/ ← CardDefinition[]
packs/ ← PackDefinition[]
objectives/ ← ObjectiveDefinition[]
sbcs/ ← SbcDefinition[]
events/ ← (future)
```
See `docs/modding.md` for schema reference.
---
## Development
```bash
cargo fmt
cargo clippy -- -D warnings
cargo test
```
---
## License
MIT — see LICENSE