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Converge remaining gossiped state: node-local news/reports/help and deterministic group registration
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Jean Chevronnet 2026-07-19 14:11:50 +00:00
parent fef4590f48
commit e23240bf52
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4 changed files with 51 additions and 16 deletions
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17
src/engine/db/tests.rs
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@ -54,6 +54,23 @@
assert_eq!(converge(&a, &a), "A");
}
#[test]
fn group_registration_conflict_converges_deterministically() {
let reg = |founder: &str, ts: u64, home: &str| Event::GroupRegistered { name: "!g".into(), founder: founder.into(), ts, home: home.into() };
let converge = |first: Event, second: Event| {
let (mut acc, mut ch, mut gr, mut bo, mut hc, mut nd) = (HashMap::new(), HashMap::new(), HashMap::new(), HashMap::new(), HostConfig::default(), NetData::default());
apply(&mut acc, &mut ch, &mut gr, &mut bo, &mut hc, &mut nd, first);
apply(&mut acc, &mut ch, &mut gr, &mut bo, &mut hc, &mut nd, second);
nd.groups[0].founder.clone()
};
let a = reg("alice", 100, "nodeA");
let b = reg("bob", 100, "nodeB");
// Two nodes claim "!g": the earlier (ts, then origin) wins, same result in
// either apply order — so gossip peers converge instead of diverging.
assert_eq!(converge(a.clone(), b.clone()), "alice", "(100,nodeA) beats (100,nodeB)");
assert_eq!(converge(b, a), "alice", "commutative: converges to the same founder");
}
// A gossiped registration that wins the name (earlier ts) moves an account's
// home. That is a hostile takeover — logging the local user out — ONLY if the
// credential differs; re-asserting the SAME account (same verifier) must not.