funman300
d8ef9d4c4f
fut_store._item() hardcoded "rareflag": 1 on every item it builds. That is inert
for players and for staff, and CORRUPTING for exactly one consumable subtype.
MEASURED, in the binary: FUN_1801bfac0 case 5 (consumable category 5, fitness)
takes the squad-fitness branch when
(cardsubtypeid == 0xdc) || FUN_1801a88c0(rec)
and FUN_1801a88c0 is exactly `*(int *)(rec + 0x58) == 1`. rec+0x58 is the rareflag
atom 0x271 (FUN_18013fe00 case 0x271 -> uStack_130; the frame arithmetic is
independently pinned by local_138 -> rec+0x50 and local_13c -> rec+0x4c, the two
offsets card_identity_probe has been reading live for days). FUN_180141660 does not
overwrite rec+0x58 for cardtype 6 -- cases 6/7/8/9 fall to the shared tail, which
writes only rec+0x54 -- so a rareflag we send survives all the way to the render.
Result: subtype 219 with rareflag 1 draws FUT_CONSUMABLE_NAME_SQUADTRAINING with
artwork 5000011 instead of Player Fitness with 5000010, and forces the
single-target count at param_5+0x1bc to 0. Silent. It would have corrupted the
first fitness card we ever served.
The guard is `0 if cardsubtypeid == 219 else rareflag`, added with two new KEYWORD
params. Every existing call site (fut_store.py:74/:357, utas_server.py:1404/:2136)
passes 8 positional args, so both take their defaults and the player dict is
byte-identical -- key order included, asserted in tools/test_card_families.py.
Scope correction to the round's own notes: rec+0x58 is read TWICE in that
42,813-char render function, not once. FUN_1801a88c0 is the category-5 read, but
line 108 reads it directly into param_5+0x1f0 (the rare/backing art) for EVERY
cardtype, before the `if (param_4 == 6)`. So the guard also stops a 219 being drawn
as rare -- intended, since rare IS the squad-fitness selector.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VUT92pz6RWKih9dSr8ZpxW
OpenFUT
Offline Ultimate Team — like SPT, but for FIFA 23.
OpenFUT replaces EA's retired FUT servers with a fully offline, single-player backend. You own FIFA 23 legitimately. You just want to keep playing after EA shut down the servers.
Repositories
| Repo | Purpose |
|---|---|
openfut-core |
Game-independent offline FUT backend |
openfut-bridge |
FIFA 23 integration layer + reverse-engineering proxy |
Architecture
FIFA 23 client
│
▼
┌─────────────────┐
│ openfut-bridge │ ← intercepts FUT traffic, maps routes, logs unknown
└────────┬────────┘
│
▼
┌─────────────────┐
│ openfut-core │ ← offline FUT backend: profiles, packs, squads, SBCs
└─────────────────┘
│
▼
SQLite database
Core is game-independent. It speaks a clean REST API and knows nothing about FIFA 23 internals.
Bridge is FIFA-specific. It speaks FIFA 23's wire protocol and translates it into Core API calls. Bridge is where all reverse engineering work happens.
Current Status
| Feature | Status |
|---|---|
| Local profiles + clubs | ✅ Working |
| Coin system | ✅ Working |
| Pack generator | ✅ Working |
| Card collection | ✅ Working |
| Squad builder | ✅ Working |
| Objectives engine | ✅ Working |
| SBC engine | ✅ Working |
| Match rewards | ✅ Working |
| NPC transfer market | ✅ Working |
| Statistics | ✅ Working |
| FIFA 23 integration | 🔴 Reverse engineering in progress |
| Chemistry calculation | 🟡 In progress |
| Full Draft mode | 🟡 In progress |
| Squad Battles AI generator | 🟡 In progress |
| Objectives claim flow | 🟡 In progress |
Running
# Start the offline backend
cd openfut-core
cargo run
# Start the proxy (for traffic capture / FIFA integration)
cd openfut-bridge
cargo run
Core listens on http://127.0.0.1:8080 by default.
Bridge listens on http://127.0.0.1:8443 by default.
Design Principles
- Offline-first. No EA account required. No internet connection needed.
- Single-player only. This is not a multiplayer server emulator.
- Data-driven. All cards, packs, SBCs, and objectives are JSON files. Everything is moddable.
- Clean architecture. Core has zero knowledge of FIFA 23. Bridge has zero game logic.
- No copyrighted assets. No real player images, no EA trademarks in data files.
Disclaimer
This project is not affiliated with EA Sports. You must own FIFA 23 legitimately to use this software. This project does not bypass any ownership verification and is intended only to restore offline playability of a game whose online services have been retired.