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/node.rs | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) (limited to 'src/node.rs') diff --git a/src/node.rs b/src/node.rs index ddb9b7e..84a5c01 100644 --- a/src/node.rs +++ b/src/node.rs @@ -78,6 +78,8 @@ pub(crate) struct NodeConfig { /// `--challenge-lifetime`, `--key-logins-per-user`. pub(crate) challenge_lifetime: Duration, pub(crate) key_logins_per_user: usize, + /// `--genesis-root`. + pub(crate) genesis_root: Option, /// `--strict-keys`. pub(crate) strict_keys: Vec, /// `--cors-origins`. @@ -167,7 +169,14 @@ impl Node { first_users: Arc::new(config.first_users), node_key: config.node_key, sign_every: config.sign_every, - screening: Default::default(), + screening: Arc::new(std::sync::Mutex::new( + crate::access::screen::Screening::pinned(crate::swarm::roots::pin( + config.genesis_root, + &Default::default(), + )), + )), + roots: Default::default(), + genesis_root: config.genesis_root, challenges: Default::default(), token_lifetime: config.token_lifetime, session_lifetime: config.session_lifetime, -- cgit v1.3.1