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docs: doc_fetch_*_subscribe ne remplacent pas doc_subscribe

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Vérifié parce qu'elles ressemblent à des appels « ouvrir un repo » tout faits, ce
qui aurait rendu notre `ensureRepoOpen` redondant. Elles ne le sont pas : ni
l'une ni l'autre ne fait d'I/O — chacune construit un `AppRequest` et le renvoie
sérialisé (`lib.rs:1890`, `:1900`), sans session_id ni callback. `doc_subscribe`
construit la MÊME requête (`AppRequest::doc_fetch_repo_subscribe` →
`Fetch(Subscribe)`), y ajoute la session et la passe à `app_request_stream_`.
Ce sont des constructeurs de requête pour qui veut dépêcher lui-même.

Donc rien à récupérer : les employer reviendrait à réimplémenter ce que
`doc_subscribe` fait déjà. Et `doc_fetch_private_subscribe` ne diffère que par
sa cible (le store-root privé), ce qui ne change rien à la barrière — un
store-root n'en a toujours pas.
This commit is contained in:
Sylvain Duchesne
2026-08-03 17:40:50 +02:00
parent 6a3bd9c3a9
commit 07312cd0a2
1 changed files with 15 additions and 0 deletions
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docs/nextgraph-current-state.md
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@@ -293,6 +293,21 @@ has both**:
has no first-`State` barrier**: an anchored read on it can return 0 rows during
sync-lag with no signal distinguishing "still syncing" from "genuinely empty".
> **`doc_fetch_repo_subscribe` / `doc_fetch_private_subscribe` are NOT alternatives to
> `doc_subscribe`** — checked 2026-08-03, because they look like ready-made
> "open a repo" calls and they are not. Neither performs any I/O: each **builds an
> `AppRequest` and returns it serialized** (`sdk/js/lib-wasm/src/lib.rs:1890`, `:1900`),
> with no `session_id` and no callback. `doc_subscribe` builds the *same* request
> (`AppRequest::doc_fetch_repo_subscribe`, `engine/net/src/app_protocol.rs:930` →
> `Fetch(Subscribe)`), then adds the session id and runs it through
> `app_request_stream_` (`lib.rs:1921-1923`). They exist for a caller that wants to
> construct the request and dispatch it itself. So `ensureRepoOpen`'s
> `doc_subscribe` + wait-for-first-`State` is not duplicating an available call — using
> them instead would mean re-implementing what `doc_subscribe` already does. The
> difference in `doc_fetch_private_subscribe` is only its target
> (`NuriV0::new_private_store_target()`, the private store-root), which changes nothing
> about the barrier: a store-root still has none.
These two are **mutually exclusive**: the guessable target (store-root) is not
barrier-authoritative, and the barrier-authoritative target (`o:` repo) is not
guessable. **Consequence:** you cannot build a lookup table that is BOTH reachable