funman300 f371349dd5 refactor(fifa17): one authoritative discard implementation + corpus matrix
The pricing DECISION (which rating to trust, when to decline) lived in the host
while the TABLE lived in the adapter, so FIFA semantics were split across two
crates and no single function could be pointed at as authoritative.

Move the decision into the adapter as `discard::value_for_definition(subtype,
rareflag, catalog_rating, core_rating) -> Option<i64>` and have the host call it.
Its three tests move with it. There is now exactly one table implementation, one
decision point (`ItemIdentityResolver::discard_value`), and one deliberately
retained rollback ladder (`legacy_discard_value`).

Add `examples/discard_matrix.rs`, which audits an entire FIFA17 corpus using the
SHIPPED implementation rather than reimplementing the formula, so the matrix
cannot drift from what the server pays. Over the current 1717-definition corpus:

  declined -> legacy : 6   (badge, ball, kit x2, misc, stadium -- no catalog rating)
  priced zero        : 0
  negative           : 0
  implausible        : 0
  rating boundaries  : OK (1/2/3 at <65 / 65..74 / >=75)

Also re-verified both numeric cores against the LIVE client rather than trusting
the earlier notes:

  level  0x180141e8a  cmp al,0x4b -> 3 ; cmp al,0x41 ; sbb/add 2 -> 2 else 1
  value  0x180141119  imul rating*price ; /100 via 0x51eb851f ; imul 0x64 ; sub ;
                      cmp remainder,0x32 ; jl/inc   == round-half-up

`(rating*price + 50)/100` is identical to that for non-negative inputs.

Adapter 247 lib, host 120 lib, fmt and clippy clean.
2026-08-21 23:49:01 +00:00

OpenFUT

⚠️ Status — see docs/PROJECT_STATE.md (canonical). The working, actively-developed target is FIFA 17, not FIFA 23. Everything below this banner describes the superseded FIFA 23 bridge lineage and is kept for historical context.

Run the server (canonical): cd fifa17-recon/docker/fifa17-python && docker compose up -d — see fifa17-recon/FUT-RUNBOOK.md. openfut-core is the shared offline backend (still used by the FIFA 17 path); openfut-bridge is the retired FIFA 23 integration.

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.

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