funman300 739228efdb feat(host): capture unclaimed request bodies; record the consumable-apply wire
Milestone 2: the consumable-apply protocol is now LIVE_PROVEN.

Adds opt-in passthrough BODY logging (OPENFUT_FIFA17_LOG_PASSTHROUGH_BODY=1,
default off, capped at 512 bytes) because a body is what names an unknown
mutation's operands, while also being the one place a request could carry
something that should not reach a log. Staging probe only.

With it, one operator apply captured the whole thing:

    POST /ut/game/fifa17/item/resource/5001004
    {"apply":[{"id":100000003}]}

  source consumable : resource 5001004 (player contract, subtype 201) -- in the PATH
  target item(s)    : wire 100000003 (squad slot 0 GK, resourceId 200389) -- body apply[]
  verb              : POST

There is NO /apply endpoint, exactly as the static route work concluded. The
apply re-uses `ut/%s/item/resource`, which we already serve for GET (definition
lookup); the POST verb on that path is the mutation and nothing claimed it. This
is the wire form of the ApplyCardByRes task (id 0x0e), which is why the source is
a definition id rather than an instance id. `apply` is an array, so one resource
can name several targets.

Fail-closed verified: with the upstream dead the request 502s and Core is left
exactly unchanged -- coins 29,843,976, owned 1993, consumables 17, source card
still owned. No partial mutation.

NOT implemented: the response shape is unobserved and the EFFECT is unreversed.
Our catalog carries contract:7 for 5001004, documented as the matches granted,
but that is observed profile data (INFERRED), so no effect is written on it.

Bonus, caught by the same logging: the client really does request
`club/consumables/development`, which has no arm in
consumable_families_for_category and is served empty. Recorded, not guessed.

Host 120 lib tests, fmt clean.
2026-08-22 00:23:15 +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 Everything below this banner describes the superseded FIFA 23 bridge lineage and is kept for historical context.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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