prysm-pulse/beacon-chain/sync/validate_attester_slashing.go
terence tsao c0fda583e7
Update seen att slashing cache to use map (#8332)
* Hide beacon operation field if it's 0

* Use map as seen slashing cache

* Revert "Hide beacon operation field if it's 0"

This reverts commit 896fa11a0bb605212293d6fff02a8974c54710ab.

* Rm unused code

* Gaz

Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
2021-01-26 17:24:34 +00:00

90 lines
2.8 KiB
Go

package sync
import (
"context"
"github.com/libp2p/go-libp2p-core/peer"
pubsub "github.com/libp2p/go-libp2p-pubsub"
ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
"github.com/prysmaticlabs/prysm/beacon-chain/core/blocks"
"github.com/prysmaticlabs/prysm/shared/sliceutil"
"github.com/prysmaticlabs/prysm/shared/traceutil"
"go.opencensus.io/trace"
)
// Clients who receive an attester slashing on this topic MUST validate the conditions within VerifyAttesterSlashing before
// forwarding it across the network.
func (s *Service) validateAttesterSlashing(ctx context.Context, pid peer.ID, msg *pubsub.Message) pubsub.ValidationResult {
// Validation runs on publish (not just subscriptions), so we should approve any message from
// ourselves.
if pid == s.p2p.PeerID() {
return pubsub.ValidationAccept
}
// The head state will be too far away to validate any slashing.
if s.initialSync.Syncing() {
return pubsub.ValidationIgnore
}
ctx, span := trace.StartSpan(ctx, "sync.validateAttesterSlashing")
defer span.End()
m, err := s.decodePubsubMessage(msg)
if err != nil {
log.WithError(err).Debug("Could not decode message")
traceutil.AnnotateError(span, err)
return pubsub.ValidationReject
}
slashing, ok := m.(*ethpb.AttesterSlashing)
if !ok {
return pubsub.ValidationReject
}
if slashing == nil || slashing.Attestation_1 == nil || slashing.Attestation_2 == nil {
return pubsub.ValidationReject
}
if s.hasSeenAttesterSlashingIndices(slashing.Attestation_1.AttestingIndices, slashing.Attestation_2.AttestingIndices) {
return pubsub.ValidationIgnore
}
headState, err := s.chain.HeadState(ctx)
if err != nil {
return pubsub.ValidationIgnore
}
if err := blocks.VerifyAttesterSlashing(ctx, headState, slashing); err != nil {
return pubsub.ValidationReject
}
msg.ValidatorData = slashing // Used in downstream subscriber
return pubsub.ValidationAccept
}
// Returns true if the node has already received a valid attester slashing with the attesting indices.
func (s *Service) hasSeenAttesterSlashingIndices(indices1, indices2 []uint64) bool {
slashableIndices := sliceutil.IntersectionUint64(indices1, indices2)
s.seenAttesterSlashingLock.RLock()
defer s.seenAttesterSlashingLock.RUnlock()
// Return false if any of the slashing index has not been seen before. (i.e. not in cache)
for _, index := range slashableIndices {
if !s.seenAttesterSlashingCache[index] {
return false
}
}
return true
}
// Set attester slashing indices in attester slashing cache.
func (s *Service) setAttesterSlashingIndicesSeen(indices1, indices2 []uint64) {
slashableIndices := sliceutil.IntersectionUint64(indices1, indices2)
s.seenAttesterSlashingLock.Lock()
defer s.seenAttesterSlashingLock.Unlock()
for _, index := range slashableIndices {
s.seenAttesterSlashingCache[index] = true
}
}