From c9c7807bf0f068474ce5c853244bcb392bdfcce3 Mon Sep 17 00:00:00 2001 From: tv Date: Sun, 8 Nov 2026 19:16:10 +0000 Subject: roots: an epoch's root pinned, and named in every handshake Review 2, N7, the care it raised: a joining node's empty document took as the first epoch's root whatever dependency-less change came first, from whichever peer it joined through; the first epoch's ID is all zeros, so nothing pinned it. A remake's epoch has its ID, the snapshot change's hash, which the rules hold its root to. * Every node names its epoch's root in HELLO and HELLO_REPLY (the epoch's ID for a remake's, its genesis change for the first; wire version 45). A node whose document starts from another root of the same epoch refuses the handshake, logging it: another history under the swarm's ID, a forged root or a genesis started again. * A joining node with an empty document takes as its root only the one it was given (--genesis-root, new), else the one its peers name, and none while they name different ones (access::screen::RootPin, kept in Screening across documents): one peer hands it another root only if it is all the joiner hears, or never, with --genesis-root. A root refused is listed with the refused, what builds on it with it. * The genesis node logs the root (`The swarm's root`); GET /admin/epochs shows it (`root`). A genesis started again under a remembered swarm ID used to merge with the nodes of it still running; they now refuse it (another root), and the docs say to join them with seeds instead. The epoch's identity stays as it is (generation 0 all zeros): records and epoch metadata name it so, and every comparison of epochs with them. --- src/remake/api.rs | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'src/remake/api.rs') diff --git a/src/remake/api.rs b/src/remake/api.rs index 1da0539..a767706 100644 --- a/src/remake/api.rs +++ b/src/remake/api.rs @@ -881,9 +881,14 @@ pub(crate) async fn strict_manifest( /// `GET /admin/epochs`: the local epoch, the previous epochs this node still keeps, and /// an ongoing catch-up with a peer's newer epoch (`null` if none). pub(crate) async fn epochs(State(host): State) -> Response { - let current = EpochRecord::from(host.current_epoch()); + let epoch = host.current_epoch(); + let current = EpochRecord::from(epoch); + let root = host + .read_doc(move |doc| crate::swarm::roots::of(doc, epoch).map(|root| root.to_string())) + .await; Json(json!({ "current": current, + "root": root, "archived": host.remake().archived_epochs(), "catchUp": host.remake().catch_up_report(), "quarantine": host.remake().list_quarantine(|entry| entry.id.clone()), -- cgit v1.3.1