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babe, grandpa: cleanup stale equivocation reports (#8041)

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* grandpa: check equivocation report staleness on `validate_unsigned`

* babe: check equivocation report staleness on `validate_unsigned`

* node: bump spec_version

* babe, grandpa: remove duplicate call destructuring
This commit is contained in:
André Silva
2021-02-04 15:22:11 +00:00
committed by GitHub
parent a32f2b9271
commit 6dea5494f3
5 changed files with 81 additions and 49 deletions
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substrate/frame/babe/src/equivocation.rs
+27 -22
View File
@@ -167,7 +167,7 @@ where
impl<T: Config> frame_support::unsigned::ValidateUnsigned for Module<T> {
type Call = Call<T>;
fn validate_unsigned(source: TransactionSource, call: &Self::Call) -> TransactionValidity {
if let Call::report_equivocation_unsigned(equivocation_proof, _) = call {
if let Call::report_equivocation_unsigned(equivocation_proof, key_owner_proof) = call {
// discard equivocation report not coming from the local node
match source {
TransactionSource::Local | TransactionSource::InBlock => { /* allowed */ }
@@ -181,6 +181,9 @@ impl<T: Config> frame_support::unsigned::ValidateUnsigned for Module<T> {
}
}
// check report staleness
is_known_offence::<T>(equivocation_proof, key_owner_proof)?;
ValidTransaction::with_tag_prefix("BabeEquivocation")
// We assign the maximum priority for any equivocation report.
.priority(TransactionPriority::max_value())
@@ -199,33 +202,35 @@ impl<T: Config> frame_support::unsigned::ValidateUnsigned for Module<T> {
fn pre_dispatch(call: &Self::Call) -> Result<(), TransactionValidityError> {
if let Call::report_equivocation_unsigned(equivocation_proof, key_owner_proof) = call {
// check the membership proof to extract the offender's id
let key = (
sp_consensus_babe::KEY_TYPE,
equivocation_proof.offender.clone(),
);
let offender = T::KeyOwnerProofSystem::check_proof(key, key_owner_proof.clone())
.ok_or(InvalidTransaction::BadProof)?;
// check if the offence has already been reported,
// and if so then we can discard the report.
let is_known_offence = T::HandleEquivocation::is_known_offence(
&[offender],
&equivocation_proof.slot,
);
if is_known_offence {
Err(InvalidTransaction::Stale.into())
} else {
Ok(())
}
is_known_offence::<T>(equivocation_proof, key_owner_proof)
} else {
Err(InvalidTransaction::Call.into())
}
}
}
fn is_known_offence<T: Config>(
equivocation_proof: &EquivocationProof<T::Header>,
key_owner_proof: &T::KeyOwnerProof,
) -> Result<(), TransactionValidityError> {
// check the membership proof to extract the offender's id
let key = (
sp_consensus_babe::KEY_TYPE,
equivocation_proof.offender.clone(),
);
let offender = T::KeyOwnerProofSystem::check_proof(key, key_owner_proof.clone())
.ok_or(InvalidTransaction::BadProof)?;
// check if the offence has already been reported,
// and if so then we can discard the report.
if T::HandleEquivocation::is_known_offence(&[offender], &equivocation_proof.slot) {
Err(InvalidTransaction::Stale.into())
} else {
Ok(())
}
}
/// A BABE equivocation offence report.
///
/// When a validator released two or more blocks at the same slot.