Two nodes registering the same name before gossip converges no longer
end up disagreeing. Each account records its home node, and the merge
keeps the earliest registration (by timestamp, then home node), so every
node folds the log to the same owner regardless of delivery order. The
merge is commutative and idempotent.
Each event now has a scope: account identity is global and gossips to
every peer; channel state is local to the node that authored it. The
version vector, push, digest and compaction only carry global events,
and ingest refuses any non-global entry a peer sends. A node can no
longer be handed ownership of a channel registered on a network it was
never part of.
When a forwarder falls behind and drops pushes (broadcast lag), it sends
a digest with reply set; the peer answers with its own digest and we
re-send exactly what it is missing. Recovery no longer waits out a full
poll interval, so the 10s backstop rarely matters.
Optional [gossip.tls] wraps the peer link in TLS: each node presents a
certificate and requires the peer to present one signed by the configured
CA. scripts/gen-certs.sh builds a CA and node certs.
A broadcast channel forwards each freshly committed entry straight to
connected peers, so a registration propagates in milliseconds. The
periodic digest drops to a 10s anti-entropy backstop.
Nodes run anti-entropy over a TCP link: each advertises its version
vector, the peer replies with the log entries it lacks, and ingest is
idempotent so re-delivery and reconnect after a split both converge.
The engine is shared behind a mutex; config gains [gossip] and [[peer]].
