Extend the UTAS migration host to own the squad slice, reusing the exact
production identity path (Fifa17CardCatalog + ExternalIdentityStore) that
/club uses, so /club, /squad/list, userMassInfo and PUT all agree on
wire<->owned identity.
Routing (classified ONCE, no try-Rust-then-Python):
PUT …/squad/<n> -> Rust (numeric id; …/squad/active stays Python)
GET …/squad/list -> Rust
GET …/userMassInfo-> Python proxy, ONLY .squad overlaid
everything else -> Python verbatim
CoreAccess gains read_squad_ext / replace_squad / all_owned (HTTP to the new
Core /squad/ext + /squad/replace routes).
PUT pipeline: parse -> build_squad_write (reverse-resolve every wire id;
refuse unresolved/duplicate) -> AUTHORIZE every resolved owned item against
the active club (identity resolution is NOT authorization; a valid wire id
owned by another profile is rejected before any mutation) -> Core atomic
replace+extension -> exactly {"id":0}. No Python fallback on failure; no
host-side second extension store; no fingerprint recomputation.
Read path assembles ONE projection input (one read_squad_ext + one batch
all_owned; no per-slot lookup) and runs the single adapter projector. Both
/squad/list and userMassInfo.squad derive from it. Fresh projects; Stale is
never applied; Missing is never fabricated — both are prominent integrity
failures, never served from Python (no split authority). The overlay
replaces only .squad and preserves userInfo/settings/userData/
pileSizeClientData, fixing Content-Length.
Tests: routing, full-replacement + exact ack, unknown/foreign/duplicate item
rejection with Core unchanged, idempotent repeat PUT, coupled read-after-
write (list + userMassInfo agree, real resourceIds + stable wire ids),
overlay field preservation, bounded no-N+1 reads, Stale/Missing integrity.
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.