# openfut-adapter-fifa17

The FIFA 17 game adapter. Everything true of *FIFA 17 specifically* lives here,
so that neither OpenFUT Core nor the generic protocol crates have to know about
it.

```
  openfut-protocol-blaze   generic Blaze: Fire2 framing, Heat2/TDF codec
           ▲
  openfut-adapter-fifa17   THIS: command tables, response bodies, dispatch order
           ▲
  OpenFUT Core             game-independent FUT domain (not yet wired)
```

## Status

| Surface | Port | State |
|---|---|---|
| **Blaze / Fire2 RPC** | 42130 | **Implemented**, byte-for-byte parity-tested |
| Redirector (HTTPS + XML) | 42127 | Python only |
| Nucleus OAuth stub | 42131 | Python only |
| LSX / Origin | 4216 | Python only |
| Roster XML | 8081 | Python only |
| UTAS / RS4 | 8099 | Python only |
| POW / EASFC | 8094 / 8080 | Python only |

**Nothing here is wired into the running backend.** The crate answers frames; it
opens no socket, terminates no TLS and owns no runtime. The Python backend
remains the live service and the behavioural oracle.

## What the adapter owns, and what it must not

Owns: component/command/notification IDs, response body shapes, dispatch
ordering, session identity, the `fetchClientConfig` tables.

Must not own: FUT domain state. Blaze is an auth/session/config protocol — no
coins, packs, clubs or squads appear on this wire — so `Session` holds a session
key, a locale, a service name, an auth code and a flag, and that is all. When
UTAS is migrated that boundary will need active defending; here it comes free.

## Parity

```bash
./check-parity.sh          # oracle freshness + byte-for-byte replay
./check-parity.sh --regen  # after an intentional oracle change
```

`fixtures/blaze_transactions.jsonl` holds 49 request→response(s) transactions
produced by calling the real `blaze_responder_v3b.dispatch()`. They replay in
order against a shared session per connection, so ordering-dependent behaviour
is exercised rather than assumed: preAuth captures the locale that later `ALOC`
fields echo, and login sets the auth code `getAuthToken` returns afterwards.

Comparison is byte-for-byte including frame count and order — a missing
post-login notification or a reply where the oracle stays silent fails here.

The suite was **mutation-tested**: swapping two post-login notifications,
flipping one enum deep inside `AccountInfo`, and hardcoding an address in
`utas_base()`/`nucleus_base()` were each verified to turn it red. The third
initially did *not*, because the config templating had made those helpers dead
code; the table now templates on URL-level tokens so they are the single place a
URL shape is defined.

## Three behaviours that are easy to get wrong

* **Login answers with four frames, in order**: reply, then `UserAuthenticated`,
  `UserSessionExtendedDataUpdate`, `UserAdded`.
* **An unimplemented RPC still gets an empty reply.** Silence makes the client
  wait for a timeout; an empty reply lets every field fall back to a client-side
  default and the boot continues.
* **Non-request message types get nothing at all.**

No error replies are emitted. `msgType` 3 exists, but the error-code placement
is UNRESOLVED — three clean-room sources disagree between `header[14:16]`, a
metadata `ERRC`, and a payload `CNTX`/`ERRC` — so emitting one would be a guess
on the wire.

## The client config table

`fixtures/client_config.json` carries 227–243 rows per CFID, generated from the
Python oracle and templated on `{utas_base}`, `{nucleus_base}`,
`{pow_content_url}`, `{advertise}`, `{bind}`, `{pow_host}`. It is
reverse-engineered *data*, not logic, and deriving it mechanically removes a
class of transcription typo no reviewer could catch. The generator does not take
its own templating on trust: it substitutes real addresses back in and diffs
against the oracle for every section before writing the file.

The table must be *complete*, not representative. The client resolves a per-call
key (`FUT_RS4_URL_<CALL>`) before a per-module one, and any unresolved call falls
back to a real, dead EA host — that is what produced "there has been an error
connecting to FIFA 17 Ultimate Team" mid-session when only the boot subset was
served.

## Known defect reproduced deliberately

`nucleusConnect` and `nucleusConnectTrusted` are built from the **bind** address,
not the advertised one. On the live split deployment that means the backend
tells a client on another machine to reach Nucleus at `http://0.0.0.0:42131`,
which it cannot. Verified against the running container, not inferred.

This is reproduced exactly, because it is what the only proven-working
configuration does and changing it would break parity. It also implies the
Nucleus stub is not actually reached in the current remote flow. Fixing it is a
separate change that needs live validation — see the vault.

## Configuration

Nothing is hardcoded. `AdapterConfig` carries `Identity` (persona, ids, email,
namespace, entitlement group, …) and `Endpoints` (advertise, bind, POW hosts,
telemetry/ticker/QoS ports). `Default` gives the project's synthetic offline
identity on loopback; a remote deployment must override `advertise`.

Bind and advertise are deliberately distinct: an advertised URL must carry the
address the *client* can reach, which on a two-machine deployment is not the
address the server binds.
