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Freeze chain if there are byzantine threshold + 1 invalid votes against a local candidate (#7225)

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This commit is contained in:
Tsvetomir Dimitrov
2023-05-17 21:29:20 +03:00
committed by GitHub
parent 0759495cec
commit 9e4bca6895
2 changed files with 176 additions and 4 deletions
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polkadot/runtime/parachains/src/disputes.rs
+8 -2
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@@ -560,6 +560,8 @@ bitflags::bitflags! {
const FOR_SUPERMAJORITY = 0b0010;
/// Is the supermajority against the validity of the block reached.
const AGAINST_SUPERMAJORITY = 0b0100;
/// Is there f+1 against the validity of the block reached
const AGAINST_BYZANTINE = 0b1000;
}
}
@@ -582,6 +584,10 @@ impl DisputeStateFlags {
flags |= DisputeStateFlags::FOR_SUPERMAJORITY;
}
if state.validators_against.count_ones() > byzantine_threshold {
flags |= DisputeStateFlags::AGAINST_BYZANTINE;
}
if state.validators_against.count_ones() >= supermajority_threshold {
flags |= DisputeStateFlags::AGAINST_SUPERMAJORITY;
}
@@ -1243,8 +1249,8 @@ impl<T: Config> Pallet<T> {
<Disputes<T>>::insert(&session, &candidate_hash, &summary.state);
// Freeze if just concluded against some local candidate
if summary.new_flags.contains(DisputeStateFlags::AGAINST_SUPERMAJORITY) {
// Freeze if the INVALID votes against some local candidate are above the byzantine threshold
if summary.new_flags.contains(DisputeStateFlags::AGAINST_BYZANTINE) {
if let Some(revert_to) = <Included<T>>::get(&session, &candidate_hash) {
Self::revert_and_freeze(revert_to);
}