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Use all attestation subnets (#1257)

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* Update `milagro_bls` to new release (#1183)

* Update milagro_bls to new release

Signed-off-by: Kirk Baird <baird.k@outlook.com>

* Tidy up fake cryptos

Signed-off-by: Kirk Baird <baird.k@outlook.com>

* move SecretHash to bls and put plaintext back

Signed-off-by: Kirk Baird <baird.k@outlook.com>

* Update v0.12.0 to v0.12.1

* Add compute_subnet_for_attestation

* Replace CommitteeIndex topic with Attestation

* Fix warnings

* Fix attestation service tests

* fmt

* Appease clippy

* return error from validator_subscriptions

* move state out of loop

* Fix early break on error

* Get state from slot clock

* Fix beacon state in attestation tests

* Add failing test for lookahead > 1

* Minor change

* Address some review comments

* Add subnet verification to beacon chain

* Move subnet verification to processor

* Pass committee_count_at_slot to ValidatorDuty and ValidatorSubscription

* Pass subnet id for publishing attestations

* Fix attestation service tests

* Fix more tests

* Fix fork choice test

* Remove unused code

* Remove more unused and expensive code

Co-authored-by: Kirk Baird <baird.k@outlook.com>
Co-authored-by: Michael Sproul <michael@sigmaprime.io>
Co-authored-by: Age Manning <Age@AgeManning.com>
Co-authored-by: Paul Hauner <paul@paulhauner.com>
This commit is contained in:
Pawan Dhananjay
2020-06-18 14:41:03 +05:30
committed by GitHub
parent 81c9fe3817
commit 3199b1a6f2
23 changed files with 444 additions and 199 deletions
Download Patch File Download Diff File Expand all files Collapse all files

92
beacon_node/beacon_chain/src/attestation_verification.rs
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@@ -52,7 +52,7 @@ use std::borrow::Cow;
use tree_hash::TreeHash;
use types::{
Attestation, BeaconCommittee, CommitteeIndex, Epoch, EthSpec, Hash256, IndexedAttestation,
RelativeEpoch, SelectionProof, SignedAggregateAndProof, Slot,
RelativeEpoch, SelectionProof, SignedAggregateAndProof, Slot, SubnetId,
};
/// Returned when an attestation was not successfully verified. It might not have been verified for
@@ -123,6 +123,11 @@ pub enum Error {
/// The attestation is attesting to a state that is later than itself. (Viz., attesting to the
/// future).
AttestsToFutureBlock { block: Slot, attestation: Slot },
/// The attestation was received on an invalid attestation subnet.
InvalidSubnetId {
received: SubnetId,
expected: SubnetId,
},
/// The attestation failed the `state_processing` verification stage.
Invalid(AttestationValidationError),
/// There was an error whilst processing the attestation. It is not known if it is valid or invalid.
@@ -234,28 +239,29 @@ impl<T: BeaconChainTypes> VerifiedAggregatedAttestation<T> {
return Err(Error::EmptyAggregationBitfield);
}
let indexed_attestation = map_attestation_committee(chain, attestation, |committee| {
// Note: this clones the signature which is known to be a relatively slow operation.
//
// Future optimizations should remove this clone.
let selection_proof =
SelectionProof::from(signed_aggregate.message.selection_proof.clone());
let indexed_attestation =
map_attestation_committee(chain, attestation, |(committee, _)| {
// Note: this clones the signature which is known to be a relatively slow operation.
//
// Future optimizations should remove this clone.
let selection_proof =
SelectionProof::from(signed_aggregate.message.selection_proof.clone());
if !selection_proof
.is_aggregator(committee.committee.len(), &chain.spec)
.map_err(|e| Error::BeaconChainError(e.into()))?
{
return Err(Error::InvalidSelectionProof { aggregator_index });
}
if !selection_proof
.is_aggregator(committee.committee.len(), &chain.spec)
.map_err(|e| Error::BeaconChainError(e.into()))?
{
return Err(Error::InvalidSelectionProof { aggregator_index });
}
// Ensure the aggregator is a member of the committee for which it is aggregating.
if !committee.committee.contains(&(aggregator_index as usize)) {
return Err(Error::AggregatorNotInCommittee { aggregator_index });
}
// Ensure the aggregator is a member of the committee for which it is aggregating.
if !committee.committee.contains(&(aggregator_index as usize)) {
return Err(Error::AggregatorNotInCommittee { aggregator_index });
}
get_indexed_attestation(committee.committee, &attestation)
.map_err(|e| BeaconChainError::from(e).into())
})?;
get_indexed_attestation(committee.committee, &attestation)
.map_err(|e| BeaconChainError::from(e).into())
})?;
// Ensure that all signatures are valid.
if !verify_signed_aggregate_signatures(chain, &signed_aggregate, &indexed_attestation)? {
@@ -309,8 +315,12 @@ impl<T: BeaconChainTypes> VerifiedAggregatedAttestation<T> {
impl<T: BeaconChainTypes> VerifiedUnaggregatedAttestation<T> {
/// Returns `Ok(Self)` if the `attestation` is valid to be (re)published on the gossip
/// network.
///
/// `subnet_id` is the subnet from which we received this attestation. This function will
/// verify that it was received on the correct subnet.
pub fn verify(
attestation: Attestation<T::EthSpec>,
subnet_id: SubnetId,
chain: &BeaconChain<T>,
) -> Result<Self, Error> {
// Ensure attestation is within the last ATTESTATION_PROPAGATION_SLOT_RANGE slots (within a
@@ -330,7 +340,23 @@ impl<T: BeaconChainTypes> VerifiedUnaggregatedAttestation<T> {
// attestation and do not delay consideration for later.
verify_head_block_is_known(chain, &attestation)?;
let indexed_attestation = obtain_indexed_attestation(chain, &attestation)?;
let (indexed_attestation, committees_per_slot) =
obtain_indexed_attestation_and_committees_per_slot(chain, &attestation)?;
let expected_subnet_id = SubnetId::compute_subnet_for_attestation_data::<T::EthSpec>(
&indexed_attestation.data,
committees_per_slot,
&chain.spec,
)
.map_err(BeaconChainError::from)?;
// Ensure the attestation is from the correct subnet.
if subnet_id != expected_subnet_id {
return Err(Error::InvalidSubnetId {
received: subnet_id,
expected: expected_subnet_id,
});
}
let validator_index = *indexed_attestation
.attesting_indices
@@ -566,19 +592,23 @@ pub fn verify_signed_aggregate_signatures<T: BeaconChainTypes>(
Ok(verify_signature_sets(signature_sets))
}
/// Returns the `indexed_attestation` for the `attestation` using the public keys cached in the
/// `chain`.
pub fn obtain_indexed_attestation<T: BeaconChainTypes>(
/// Assists in readability.
type CommitteesPerSlot = u64;
/// Returns the `indexed_attestation` and committee count per slot for the `attestation` using the
/// public keys cached in the `chain`.
pub fn obtain_indexed_attestation_and_committees_per_slot<T: BeaconChainTypes>(
chain: &BeaconChain<T>,
attestation: &Attestation<T::EthSpec>,
) -> Result<IndexedAttestation<T::EthSpec>, Error> {
map_attestation_committee(chain, attestation, |committee| {
) -> Result<(IndexedAttestation<T::EthSpec>, CommitteesPerSlot), Error> {
map_attestation_committee(chain, attestation, |(committee, committees_per_slot)| {
get_indexed_attestation(committee.committee, &attestation)
.map(|attestation| (attestation, committees_per_slot))
.map_err(|e| BeaconChainError::from(e).into())
})
}
/// Runs the `map_fn` with the committee for the given `attestation`.
/// Runs the `map_fn` with the committee and committee count per slot for the given `attestation`.
///
/// This function exists in this odd "map" pattern because efficiently obtaining the committee for
/// an attestation can be complex. It might involve reading straight from the
@@ -594,7 +624,7 @@ pub fn map_attestation_committee<'a, T, F, R>(
) -> Result<R, Error>
where
T: BeaconChainTypes,
F: Fn(BeaconCommittee) -> Result<R, Error>,
F: Fn((BeaconCommittee, CommitteesPerSlot)) -> Result<R, Error>,
{
let attestation_epoch = attestation.data.slot.epoch(T::EthSpec::slots_per_epoch());
let target = &attestation.data.target;
@@ -624,9 +654,10 @@ where
metrics::stop_timer(cache_wait_timer);
if let Some(committee_cache) = shuffling_cache.get(attestation_epoch, target.root) {
let committees_per_slot = committee_cache.committees_per_slot();
committee_cache
.get_beacon_committee(attestation.data.slot, attestation.data.index)
.map(map_fn)
.map(|committee| map_fn((committee, committees_per_slot)))
.unwrap_or_else(|| {
Err(Error::NoCommitteeForSlotAndIndex {
slot: attestation.data.slot,
@@ -689,9 +720,10 @@ where
metrics::stop_timer(committee_building_timer);
let committees_per_slot = committee_cache.committees_per_slot();
committee_cache
.get_beacon_committee(attestation.data.slot, attestation.data.index)
.map(map_fn)
.map(|committee| map_fn((committee, committees_per_slot)))
.unwrap_or_else(|| {
Err(Error::NoCommitteeForSlotAndIndex {
slot: attestation.data.slot,