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blocks.go
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/
blocks.go
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package validator
import (
"github.com/pkg/errors"
"github.com/prysmaticlabs/prysm/v5/async/event"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed"
blockfeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/block"
statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
"github.com/prysmaticlabs/prysm/v5/runtime/version"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
// StreamBlocksAltair to clients every single time a block is received by the beacon node.
func (vs *Server) StreamBlocksAltair(req *ethpb.StreamBlocksRequest, stream ethpb.BeaconNodeValidator_StreamBlocksAltairServer) error {
blocksChannel := make(chan *feed.Event, 1)
var blockSub event.Subscription
if req.VerifiedOnly {
blockSub = vs.StateNotifier.StateFeed().Subscribe(blocksChannel)
} else {
blockSub = vs.BlockNotifier.BlockFeed().Subscribe(blocksChannel)
}
defer blockSub.Unsubscribe()
for {
select {
case blockEvent := <-blocksChannel:
if req.VerifiedOnly {
if err := sendVerifiedBlocks(stream, blockEvent); err != nil {
return err
}
} else {
if err := vs.sendBlocks(stream, blockEvent); err != nil {
return err
}
}
case <-blockSub.Err():
return status.Error(codes.Aborted, "Subscriber closed, exiting goroutine")
case <-vs.Ctx.Done():
return status.Error(codes.Canceled, "Context canceled")
case <-stream.Context().Done():
return status.Error(codes.Canceled, "Context canceled")
}
}
}
// StreamSlots sends a block's slot to clients every single time a block is received by the beacon node.
func (vs *Server) StreamSlots(req *ethpb.StreamSlotsRequest, stream ethpb.BeaconNodeValidator_StreamSlotsServer) error {
ch := make(chan *feed.Event, 1)
var sub event.Subscription
if req.VerifiedOnly {
sub = vs.StateNotifier.StateFeed().Subscribe(ch)
} else {
sub = vs.BlockNotifier.BlockFeed().Subscribe(ch)
}
defer sub.Unsubscribe()
for {
select {
case ev := <-ch:
var s primitives.Slot
if req.VerifiedOnly {
if ev.Type != statefeed.BlockProcessed {
continue
}
data, ok := ev.Data.(*statefeed.BlockProcessedData)
if !ok || data == nil {
continue
}
s = data.Slot
} else {
if ev.Type != blockfeed.ReceivedBlock {
continue
}
data, ok := ev.Data.(*blockfeed.ReceivedBlockData)
if !ok || data == nil {
continue
}
s = data.SignedBlock.Block().Slot()
}
if err := stream.Send(ðpb.StreamSlotsResponse{Slot: s}); err != nil {
return status.Errorf(codes.Unavailable, "Could not send over stream: %v", err)
}
case <-sub.Err():
return status.Error(codes.Aborted, "Subscriber closed, exiting goroutine")
case <-vs.Ctx.Done():
return status.Error(codes.Canceled, "Context canceled")
case <-stream.Context().Done():
return status.Error(codes.Canceled, "Context canceled")
}
}
}
func sendVerifiedBlocks(stream ethpb.BeaconNodeValidator_StreamBlocksAltairServer, blockEvent *feed.Event) error {
if blockEvent.Type != statefeed.BlockProcessed {
return nil
}
data, ok := blockEvent.Data.(*statefeed.BlockProcessedData)
if !ok || data == nil {
return nil
}
b := ðpb.StreamBlocksResponse{}
switch data.SignedBlock.Version() {
case version.Phase0:
pb, err := data.SignedBlock.Proto()
if err != nil {
return errors.Wrap(err, "could not get protobuf block")
}
phBlk, ok := pb.(*ethpb.SignedBeaconBlock)
if !ok {
log.Warn("Mismatch between version and block type, was expecting SignedBeaconBlock")
return nil
}
b.Block = ðpb.StreamBlocksResponse_Phase0Block{Phase0Block: phBlk}
case version.Altair:
pb, err := data.SignedBlock.Proto()
if err != nil {
return errors.Wrap(err, "could not get protobuf block")
}
phBlk, ok := pb.(*ethpb.SignedBeaconBlockAltair)
if !ok {
log.Warn("Mismatch between version and block type, was expecting SignedBeaconBlockAltair")
return nil
}
b.Block = ðpb.StreamBlocksResponse_AltairBlock{AltairBlock: phBlk}
case version.Bellatrix:
pb, err := data.SignedBlock.Proto()
if err != nil {
return errors.Wrap(err, "could not get protobuf block")
}
phBlk, ok := pb.(*ethpb.SignedBeaconBlockBellatrix)
if !ok {
log.Warn("Mismatch between version and block type, was expecting SignedBeaconBlockBellatrix")
return nil
}
b.Block = ðpb.StreamBlocksResponse_BellatrixBlock{BellatrixBlock: phBlk}
case version.Capella:
pb, err := data.SignedBlock.Proto()
if err != nil {
return errors.Wrap(err, "could not get protobuf block")
}
phBlk, ok := pb.(*ethpb.SignedBeaconBlockCapella)
if !ok {
log.Warn("Mismatch between version and block type, was expecting SignedBeaconBlockCapella")
return nil
}
b.Block = ðpb.StreamBlocksResponse_CapellaBlock{CapellaBlock: phBlk}
case version.Deneb:
pb, err := data.SignedBlock.Proto()
if err != nil {
return errors.Wrap(err, "could not get protobuf block")
}
phBlk, ok := pb.(*ethpb.SignedBeaconBlockDeneb)
if !ok {
log.Warn("Mismatch between version and block type, was expecting SignedBeaconBlockDeneb")
return nil
}
b.Block = ðpb.StreamBlocksResponse_DenebBlock{DenebBlock: phBlk}
case version.Electra:
pb, err := data.SignedBlock.Proto()
if err != nil {
return errors.Wrap(err, "could not get protobuf block")
}
phBlk, ok := pb.(*ethpb.SignedBeaconBlockElectra)
if !ok {
log.Warn("Mismatch between version and block type, was expecting SignedBeaconBlockElectra")
return nil
}
b.Block = ðpb.StreamBlocksResponse_ElectraBlock{ElectraBlock: phBlk}
}
if err := stream.Send(b); err != nil {
return status.Errorf(codes.Unavailable, "Could not send over stream: %v", err)
}
return nil
}
func (vs *Server) sendBlocks(stream ethpb.BeaconNodeValidator_StreamBlocksAltairServer, blockEvent *feed.Event) error {
if blockEvent.Type != blockfeed.ReceivedBlock {
return nil
}
data, ok := blockEvent.Data.(*blockfeed.ReceivedBlockData)
if !ok || data == nil {
// Got bad data over the stream.
return nil
}
if data.SignedBlock == nil {
// One nil block shouldn't stop the stream.
return nil
}
log := log.WithField("blockSlot", data.SignedBlock.Block().Slot())
headState, err := vs.HeadFetcher.HeadStateReadOnly(vs.Ctx)
if err != nil {
log.WithError(err).Error("Could not get head state")
return nil
}
signed := data.SignedBlock
sig := signed.Signature()
if err := blocks.VerifyBlockSignature(headState, signed.Block().ProposerIndex(), sig[:], signed.Block().HashTreeRoot); err != nil {
log.WithError(err).Error("Could not verify block signature")
return nil
}
b := ðpb.StreamBlocksResponse{}
pb, err := data.SignedBlock.Proto()
if err != nil {
return errors.Wrap(err, "could not get protobuf block")
}
switch p := pb.(type) {
case *ethpb.SignedBeaconBlock:
b.Block = ðpb.StreamBlocksResponse_Phase0Block{Phase0Block: p}
case *ethpb.SignedBeaconBlockAltair:
b.Block = ðpb.StreamBlocksResponse_AltairBlock{AltairBlock: p}
case *ethpb.SignedBeaconBlockBellatrix:
b.Block = ðpb.StreamBlocksResponse_BellatrixBlock{BellatrixBlock: p}
case *ethpb.SignedBeaconBlockCapella:
b.Block = ðpb.StreamBlocksResponse_CapellaBlock{CapellaBlock: p}
case *ethpb.SignedBeaconBlockDeneb:
b.Block = ðpb.StreamBlocksResponse_DenebBlock{DenebBlock: p}
case *ethpb.SignedBeaconBlockElectra:
b.Block = ðpb.StreamBlocksResponse_ElectraBlock{ElectraBlock: p}
default:
log.Errorf("Unknown block type %T", p)
}
if err := stream.Send(b); err != nil {
return status.Errorf(codes.Unavailable, "Could not send over stream: %v", err)
}
return nil
}