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a019a0db4c
* combines func params * update leftovers Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
100 lines
3.2 KiB
Go
100 lines
3.2 KiB
Go
package sync
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import (
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"context"
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"sort"
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"github.com/libp2p/go-libp2p-core/peer"
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pubsub "github.com/libp2p/go-libp2p-pubsub"
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ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
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"github.com/prysmaticlabs/prysm/beacon-chain/core/blocks"
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"github.com/prysmaticlabs/prysm/shared/hashutil"
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"github.com/prysmaticlabs/prysm/shared/sliceutil"
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"github.com/prysmaticlabs/prysm/shared/traceutil"
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"go.opencensus.io/trace"
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)
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// Clients who receive an attester slashing on this topic MUST validate the conditions within VerifyAttesterSlashing before
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// forwarding it across the network.
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func (s *Service) validateAttesterSlashing(ctx context.Context, pid peer.ID, msg *pubsub.Message) pubsub.ValidationResult {
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// Validation runs on publish (not just subscriptions), so we should approve any message from
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// ourselves.
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if pid == s.p2p.PeerID() {
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return pubsub.ValidationAccept
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}
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// The head state will be too far away to validate any slashing.
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if s.initialSync.Syncing() {
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return pubsub.ValidationIgnore
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}
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ctx, span := trace.StartSpan(ctx, "sync.validateAttesterSlashing")
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defer span.End()
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m, err := s.decodePubsubMessage(msg)
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if err != nil {
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log.WithError(err).Error("Failed to decode message")
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traceutil.AnnotateError(span, err)
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return pubsub.ValidationReject
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}
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slashing, ok := m.(*ethpb.AttesterSlashing)
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if !ok {
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return pubsub.ValidationReject
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}
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if slashing == nil || slashing.Attestation_1 == nil || slashing.Attestation_2 == nil {
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return pubsub.ValidationReject
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}
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if s.hasSeenAttesterSlashingIndices(slashing.Attestation_1.AttestingIndices, slashing.Attestation_2.AttestingIndices) {
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return pubsub.ValidationIgnore
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}
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headState, err := s.chain.HeadState(ctx)
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if err != nil {
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return pubsub.ValidationIgnore
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}
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if err := blocks.VerifyAttesterSlashing(ctx, headState, slashing); err != nil {
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return pubsub.ValidationReject
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}
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msg.ValidatorData = slashing // Used in downstream subscriber
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return pubsub.ValidationAccept
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}
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// Returns true if the node has already received a valid attester slashing with the attesting indices.
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func (s *Service) hasSeenAttesterSlashingIndices(indices1, indices2 []uint64) bool {
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s.seenAttesterSlashingLock.RLock()
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defer s.seenAttesterSlashingLock.RUnlock()
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slashableIndices := sliceutil.IntersectionUint64(indices1, indices2)
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sort.SliceStable(slashableIndices, func(i, j int) bool {
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return slashableIndices[i] < slashableIndices[j]
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})
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IndicesInBytes := make([]byte, 0, len(slashableIndices))
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for _, i := range slashableIndices {
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IndicesInBytes = append(IndicesInBytes, byte(i))
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}
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b := hashutil.FastSum256(IndicesInBytes)
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_, seen := s.seenAttesterSlashingCache.Get(b)
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return seen
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}
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// Set attester slashing indices in attester slashing cache.
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func (s *Service) setAttesterSlashingIndicesSeen(indices1, indices2 []uint64) {
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s.seenAttesterSlashingLock.Lock()
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defer s.seenAttesterSlashingLock.Unlock()
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slashableIndices := sliceutil.IntersectionUint64(indices1, indices2)
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sort.SliceStable(slashableIndices, func(i, j int) bool {
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return slashableIndices[i] < slashableIndices[j]
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})
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IndicesInBytes := make([]byte, 0, len(slashableIndices))
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for _, i := range slashableIndices {
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IndicesInBytes = append(IndicesInBytes, byte(i))
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}
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b := hashutil.FastSum256(IndicesInBytes)
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s.seenAttesterSlashingCache.Add(b, true)
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}
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