mirror of
https://gitlab.com/pulsechaincom/prysm-pulse.git
synced 2024-12-23 11:57:18 +00:00
97 lines
3.0 KiB
Go
97 lines
3.0 KiB
Go
package sync
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import (
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"context"
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"errors"
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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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"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
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"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
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opfeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/operation"
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types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
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"github.com/prysmaticlabs/prysm/v3/monitoring/tracing"
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ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
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"go.opencensus.io/trace"
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)
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// Clients who receive a voluntary exit on this topic MUST validate the conditions within process_voluntary_exit before
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// forwarding it across the network.
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func (s *Service) validateVoluntaryExit(ctx context.Context, pid peer.ID, msg *pubsub.Message) (pubsub.ValidationResult, error) {
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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.cfg.p2p.PeerID() {
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return pubsub.ValidationAccept, nil
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}
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// The head state will be too far away to validate any voluntary exit.
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if s.cfg.initialSync.Syncing() {
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return pubsub.ValidationIgnore, nil
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}
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ctx, span := trace.StartSpan(ctx, "sync.validateVoluntaryExit")
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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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tracing.AnnotateError(span, err)
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return pubsub.ValidationReject, err
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}
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exit, ok := m.(*ethpb.SignedVoluntaryExit)
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if !ok {
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return pubsub.ValidationReject, errWrongMessage
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}
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if exit.Exit == nil {
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return pubsub.ValidationReject, errNilMessage
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}
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if s.hasSeenExitIndex(exit.Exit.ValidatorIndex) {
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return pubsub.ValidationIgnore, nil
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}
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headState, err := s.cfg.chain.HeadState(ctx)
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if err != nil {
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return pubsub.ValidationIgnore, err
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}
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if uint64(exit.Exit.ValidatorIndex) >= uint64(headState.NumValidators()) {
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return pubsub.ValidationReject, errors.New("validator index is invalid")
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}
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val, err := headState.ValidatorAtIndexReadOnly(exit.Exit.ValidatorIndex)
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if err != nil {
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return pubsub.ValidationIgnore, err
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}
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if err := blocks.VerifyExitAndSignature(val, headState.Slot(), headState.Fork(), exit, headState.GenesisValidatorsRoot()); err != nil {
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return pubsub.ValidationReject, err
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}
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msg.ValidatorData = exit // Used in downstream subscriber
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// Broadcast the voluntary exit on a feed to notify other services in the beacon node
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// of a received voluntary exit.
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s.cfg.operationNotifier.OperationFeed().Send(&feed.Event{
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Type: opfeed.ExitReceived,
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Data: &opfeed.ExitReceivedData{
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Exit: exit,
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},
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})
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return pubsub.ValidationAccept, nil
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}
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// Returns true if the node has already received a valid exit request for the validator with index `i`.
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func (s *Service) hasSeenExitIndex(i types.ValidatorIndex) bool {
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s.seenExitLock.RLock()
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defer s.seenExitLock.RUnlock()
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_, seen := s.seenExitCache.Get(i)
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return seen
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}
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// Set exit request index `i` in seen exit request cache.
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func (s *Service) setExitIndexSeen(i types.ValidatorIndex) {
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s.seenExitLock.Lock()
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defer s.seenExitLock.Unlock()
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s.seenExitCache.Add(i, true)
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}
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