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Slash reports (#523)

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* report_slashes plumbing in Substrate

Notably delays the SetRetired event until it provides a slash report or the set
after it becomes the set to report its slashes.

* Add dedicated AcceptedHandover event

* Add SlashReport TX to Tributary

* Create SlashReport TXs

* Handle SlashReport TXs

* Add logic to generate a SlashReport to the coordinator

* Route SlashReportSigner into the processor

* Finish routing the SlashReport signing/TX publication

* Add serai feature to processor's serai-client
This commit is contained in:
Luke Parker
2024-01-29 03:48:53 -05:00
committed by GitHub
parent 0b8c7ade6e
commit 4913873b10
17 changed files with 917 additions and 67 deletions
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39
coordinator/src/substrate/mod.rs
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@@ -208,10 +208,12 @@ async fn handle_batch_and_burns<Pro: Processors>(
// Handle a specific Substrate block, returning an error when it fails to get data
// (not blocking / holding)
#[allow(clippy::too_many_arguments)]
async fn handle_block<D: Db, Pro: Processors>(
db: &mut D,
key: &Zeroizing<<Ristretto as Ciphersuite>::F>,
new_tributary_spec: &mpsc::UnboundedSender<TributarySpec>,
perform_slash_report: &mpsc::UnboundedSender<ValidatorSet>,
tributary_retired: &mpsc::UnboundedSender<ValidatorSet>,
processors: &Pro,
serai: &Serai,
@@ -287,6 +289,27 @@ async fn handle_block<D: Db, Pro: Processors>(
event_id += 1;
}
for accepted_handover in serai.as_of(hash).validator_sets().accepted_handover_events().await? {
let ValidatorSetsEvent::AcceptedHandover { set } = accepted_handover else {
panic!("AcceptedHandover event wasn't AcceptedHandover: {accepted_handover:?}");
};
if set.network == NetworkId::Serai {
continue;
}
if HandledEvent::is_unhandled(db, hash, event_id) {
log::info!("found fresh accepted handover event {:?}", accepted_handover);
// TODO: This isn't atomic with the event handling
// Send a oneshot receiver so we can await the response?
perform_slash_report.send(set).unwrap();
let mut txn = db.txn();
HandledEvent::handle_event(&mut txn, hash, event_id);
txn.commit();
}
event_id += 1;
}
for retired_set in serai.as_of(hash).validator_sets().set_retired_events().await? {
let ValidatorSetsEvent::SetRetired { set } = retired_set else {
panic!("SetRetired event wasn't SetRetired: {retired_set:?}");
@@ -320,10 +343,12 @@ async fn handle_block<D: Db, Pro: Processors>(
Ok(())
}
#[allow(clippy::too_many_arguments)]
async fn handle_new_blocks<D: Db, Pro: Processors>(
db: &mut D,
key: &Zeroizing<<Ristretto as Ciphersuite>::F>,
new_tributary_spec: &mpsc::UnboundedSender<TributarySpec>,
perform_slash_report: &mpsc::UnboundedSender<ValidatorSet>,
tributary_retired: &mpsc::UnboundedSender<ValidatorSet>,
processors: &Pro,
serai: &Serai,
@@ -349,7 +374,17 @@ async fn handle_new_blocks<D: Db, Pro: Processors>(
.expect("couldn't get block before the latest finalized block");
log::info!("handling substrate block {b}");
handle_block(db, key, new_tributary_spec, tributary_retired, processors, serai, block).await?;
handle_block(
db,
key,
new_tributary_spec,
perform_slash_report,
tributary_retired,
processors,
serai,
block,
)
.await?;
*next_block += 1;
let mut txn = db.txn();
@@ -368,6 +403,7 @@ pub async fn scan_task<D: Db, Pro: Processors>(
processors: Pro,
serai: Arc<Serai>,
new_tributary_spec: mpsc::UnboundedSender<TributarySpec>,
perform_slash_report: mpsc::UnboundedSender<ValidatorSet>,
tributary_retired: mpsc::UnboundedSender<ValidatorSet>,
) {
log::info!("scanning substrate");
@@ -443,6 +479,7 @@ pub async fn scan_task<D: Db, Pro: Processors>(
&mut db,
&key,
&new_tributary_spec,
&perform_slash_report,
&tributary_retired,
&processors,
&serai,