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. --- docs/example.toml | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'docs/example.toml') diff --git a/docs/example.toml b/docs/example.toml index d5af848..70d65b2 100644 --- a/docs/example.toml +++ b/docs/example.toml @@ -105,6 +105,12 @@ htpasswd = "/etc/continuum/htpasswd" # together at most. # key-logins-per-user = 100 +# The hash of the swarm's genesis change (hex, as its genesis node logs it and GET +# /admin/epochs shows it): joining with an empty document, the only root this node +# takes. Without, the one its peers name, none while they name different ones +# (docs/access.md). +# genesis-root = "…" + # SSH keys, as authorized_keys lines (ssh-ed25519 [comment]), whose signature # on a strict remake's manifest this node takes: the values kept when the swarm turns # strict (docs/access.md). Without, it votes for no strict remake; a majority of the -- cgit v1.3.1