funman300
f6606accb3
Core gains the generic settlement (gitlink 31ab4a6); the FIFA-specific parts live here. FEE (openfut-adapter-fifa17/src/fut/economy_policy.rs), beside pack_price and match_reward_total because 5% is a game policy constant and Core must stay game-neutral — Core only validates 0 <= fee <= gross and never computes a rate: TRANSFER_MARKET_FEE_PERCENT = 5 transfer_market_fee(gross) = floor(gross * 5 / 100), i128 intermediate seller_proceeds(gross) = gross - fee Integer only. Floating point is never used for coin settlement: 0.05 is not representable in binary and a f64 round trip can create or destroy a coin at large prices. Widening to i128 makes overflow unreachable for any i64 price, so no price ceiling has to be assumed. ROUNDING IS A CHOICE AND IT IS NOT CONFIRMED. The fee is floored, so the seller keeps the fractional coin, chosen because it makes fee + proceeds == gross hold exactly at every input — the property the accounting invariant rests on. The discriminating case against flooring the seller's 95% instead is a gross of 150: this rule pays 143, the alternative 142. Nothing in the corpus or the client binary settles which the real server did (the client is only ever told the gross; no tax/netPrice/sellerProceeds wire field exists). Pinned at 0/1/19/20/21/39/40/100/ 150/200/1_000/15_000/15_000_000/i64::MAX plus a fee+proceeds==gross sweep. HOST: CoreEconomy gains settle_sale + EconomySale/EconomySaleReceipt, implemented on HttpCoreClient as POST /economy/settle-sale. Request field names were checked against Core's actual SettleSaleRequest/SaleReceipt rather than assumed. Absent club ids are OMITTED from the body (not null), which is what Core's Outside/active-club defaults depend on, so a unit test pins that body shape. handle_market_buy is deliberately untouched: the synthetic buy path has no counterparty, so minting there is correct. HARNESS: scripts/settlement-staging.py, stdlib only, drives a REAL Core over real HTTP on an ephemeral port against a throwaway DB (production 8099/8199/18080 in a hard deny-list checked in three places), seeds the canonical two-party fixture, prints BEFORE/PURCHASE/AFTER with PASS-FAIL lines, cleans up in a finally. 31/31 pass. It found the rejection-precedence bug fixed in Core, and that Core's content preflight aborts startup on an owned card whose CardDefinitionId no pack defines. Gates: Core 194, adapter 217, host 127, harness 31/31, clippy clean, new code fmt-clean. Nothing deployed; no production process, port or database was touched.
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.