funman300
16771b0b33
Three diagnostics from chasing a FUT error that four server-side fixes failed to resolve, kept because the technique generalises. client-error-string.py recovers FIFA's on-screen message from /proc/<pid>/mem, read-only, scanning ASCII and UTF-16LE (FIFA UI strings are wide). This ended the guessing: the dialog reads "An error occurred downloading the FUT Squad Update. Please try again." -- a CONTENT DOWNLOAD failure, not the player's lineup. Every squad fix before it was aimed at the wrong subsystem, because "squad update" in FIFA means the roster update, and the server-side symptom (a squad the client would not accept) was consistent with both readings. When the server says 200 and the client says no, the client's own words are the cheapest evidence available and should have been the FIRST thing recovered, not the fifth. hub-dump.py + hub-diff-prod-staging.py diff every hub route between production (known-good, same client accepts it) and staging, comparing key presence and JSON types rather than values, since values legitimately differ. Result: 0 structural differences across 14 routes, which retired the whole "a missing field breaks bootstrap" line of investigation in one run instead of one restart at a time. Also ruled out with evidence: cert gates ARE patched (autopatch logs "pid 56298: PATCHED cert gates", and the gate bytes read back as the patched patterns); the roster server serves the FUT Squad Update fine (TLS1.2 AES256-GCM-SHA384, HTTP/1.0 200, application/xml) once probed with ALL:@SECLEVEL=0 -- a default modern context gets SSLV3_ALERT_HANDSHAKE_FAILURE and would have been a false alarm; production and staging Blaze advertise identical roster/POW hosts; the Blaze session is healthy and answering PINGs; and the squad round-trips exactly through PUT/GET.
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.