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Fix blob sidecar subnet check (#13102)

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Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
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terencechain 2023-10-23 16:08:25 -07:00 committed by GitHub
parent 00826e8858
commit f55708b995
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1 changed files with 6 additions and 2 deletions
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8
beacon-chain/sync/validate_blob.go
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@ -61,8 +61,8 @@ func (s *Service) validateBlob(ctx context.Context, pid peer.ID, msg *pubsub.Mes
} }
blob := sBlob.Message blob := sBlob.Message
// [REJECT] The sidecar is for the correct topic -- i.e. sidecar.index matches the topic {index}. // [REJECT] The sidecar is for the correct subnet -- i.e. compute_subnet_for_blob_sidecar(sidecar.index) == subnet_id.
want := fmt.Sprintf("blob_sidecar_%d", blob.Index) want := fmt.Sprintf("blob_sidecar_%d", computeSubnetForBlobSidecar(blob.Index))
if !strings.Contains(*msg.Topic, want) { if !strings.Contains(*msg.Topic, want) {
log.WithFields(blobFields(blob)).Debug("Sidecar blob does not match topic") log.WithFields(blobFields(blob)).Debug("Sidecar blob does not match topic")
return pubsub.ValidationReject, fmt.Errorf("wrong topic name: %s", *msg.Topic) return pubsub.ValidationReject, fmt.Errorf("wrong topic name: %s", *msg.Topic)
@ -237,3 +237,7 @@ func blobFields(b *eth.BlobSidecar) logrus.Fields {
"index": b.Index, "index": b.Index,
} }
} }
func computeSubnetForBlobSidecar(index uint64) uint64 {
return index % params.BeaconConfig().BlobsidecarSubnetCount
}