prysm-pulse/beacon-chain/sync/subscriber_beacon_aggregate_proof.go
2020-06-09 15:40:48 -07:00

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package sync
import (
"context"
"errors"
"fmt"
"github.com/gogo/protobuf/proto"
ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
"github.com/prysmaticlabs/prysm/beacon-chain/core/feed"
"github.com/prysmaticlabs/prysm/beacon-chain/core/feed/operation"
"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
)
// beaconAggregateProofSubscriber forwards the incoming validated aggregated attestation and proof to the
// attestation pool for processing.
func (r *Service) beaconAggregateProofSubscriber(ctx context.Context, msg proto.Message) error {
a, ok := msg.(*ethpb.SignedAggregateAttestationAndProof)
if !ok {
return fmt.Errorf("message was not type *eth.SignedAggregateAttestationAndProof, type=%T", msg)
}
if a.Message.Aggregate == nil || a.Message.Aggregate.Data == nil {
return errors.New("nil aggregate")
}
// Broadcast the aggregated attestation on a feed to notify other services in the beacon node
// of a received aggregated attestation.
r.attestationNotifier.OperationFeed().Send(&feed.Event{
Type: operation.AggregatedAttReceived,
Data: &operation.AggregatedAttReceivedData{
Attestation: a.Message,
},
})
// An unaggregated attestation can make it here. Its valid, the aggregator it just itself, although it means poor performance for the subnet.
if !helpers.IsAggregated(a.Message.Aggregate) {
return r.attPool.SaveUnaggregatedAttestation(a.Message.Aggregate)
}
return r.attPool.SaveAggregatedAttestation(a.Message.Aggregate)
}