Implement SubscribeCommitteeSubnet method

WORKSPACE

@@ -1309,7 +1309,7 @@ go_repository(
 
 go_repository(
     name = "com_github_prysmaticlabs_ethereumapis",
-    commit = "90224d88dd65813ba2f35197bb1bb8915b2d0c6b",
+    commit = "3f6a75ac9460621b140270b90057a5a445d66436",
     importpath = "github.com/prysmaticlabs/ethereumapis",
     patch_args = ["-p1"],
     patches = [

beacon-chain/cache/BUILD.bazel

@@ -41,6 +41,7 @@ go_test(
         "attestation_data_test.go",
         "checkpoint_state_test.go",
         "committee_fuzz_test.go",
+        "committee_ids_test.go",
         "committee_test.go",
         "eth1_data_test.go",
         "feature_flag_test.go",

beacon-chain/cache/committee_ids.go

@@ -4,39 +4,79 @@ import (
 	"sync"
 
 	lru "github.com/hashicorp/golang-lru"
+	"github.com/prysmaticlabs/prysm/shared/params"
 	"github.com/prysmaticlabs/prysm/shared/sliceutil"
 )
 
 type committeeIDs struct {
-	cache *lru.Cache
-	lock  sync.RWMutex
+	attester       *lru.Cache
+	attesterLock   sync.RWMutex
+	aggregator     *lru.Cache
+	aggregatorLock sync.RWMutex
 }
 
-// CommitteeIDs for attestations.
+// CommitteeIDs for attester and aggregator.
 var CommitteeIDs = newCommitteeIDs()
 
 func newCommitteeIDs() *committeeIDs {
-	cache, err := lru.New(8)
+	// Given a node can calculate committee assignments of current epoch and next epoch.
+	// Max size is set to 2 epoch length.
+	cacheSize := int(params.BeaconConfig().MaxCommitteesPerSlot * params.BeaconConfig().SlotsPerEpoch * 2)
+	attesterCache, err := lru.New(cacheSize)
 	if err != nil {
 		panic(err)
 	}
-	return &committeeIDs{cache: cache}
+	aggregatorCache, err := lru.New(cacheSize)
+	if err != nil {
+		panic(err)
+	}
+	return &committeeIDs{attester: attesterCache, aggregator: aggregatorCache}
 }
 
-// AddIDs to the cache for attestation committees by epoch.
-func (t *committeeIDs) AddIDs(indices []uint64, epoch uint64) {
-	t.lock.Lock()
-	defer t.lock.Unlock()
-	val, exists := t.cache.Get(epoch)
+// AddAttesterCommiteeID adds committee ID for subscribing subnet for the attester of a given slot.
+func (c *committeeIDs) AddAttesterCommiteeID(slot uint64, committeeID uint64) {
+	c.attesterLock.Lock()
+	defer c.attesterLock.Unlock()
+
+	ids := []uint64{committeeID}
+	val, exists := c.attester.Get(slot)
 	if exists {
-		indices = sliceutil.UnionUint64(append(indices, val.([]uint64)...))
+		ids = sliceutil.UnionUint64(append(val.([]uint64), ids...))
 	}
-	t.cache.Add(epoch, indices)
+	c.attester.Add(slot, ids)
 }
 
-// GetIDs from the cache for attestation committees by epoch.
-func (t *committeeIDs) GetIDs(epoch uint64) []uint64 {
-	val, exists := t.cache.Get(epoch)
+// GetAttesterCommitteeIDs gets the committee ID for subscribing subnet for attester of the slot.
+func (c *committeeIDs) GetAttesterCommitteeIDs(slot uint64) []uint64 {
+	c.attesterLock.RLock()
+	defer c.attesterLock.RUnlock()
+
+	val, exists := c.attester.Get(slot)
+	if !exists {
+		return []uint64{}
+	}
+	return val.([]uint64)
+}
+
+// AddAggregatorCommiteeID adds committee ID for subscribing subnet for the aggregator of a given slot.
+func (c *committeeIDs) AddAggregatorCommiteeID(slot uint64, committeeID uint64) {
+	c.aggregatorLock.Lock()
+	defer c.aggregatorLock.Unlock()
+
+	ids := []uint64{committeeID}
+	val, exists := c.aggregator.Get(slot)
+	if exists {
+		ids = sliceutil.UnionUint64(append(val.([]uint64), ids...))
+	}
+	c.aggregator.Add(slot, ids)
+}
+
+// GetAggregatorCommitteeIDs gets the committee ID for subscribing subnet for aggregator of the slot.
+func (c *committeeIDs) GetAggregatorCommitteeIDs(slot uint64) []uint64 {
+	c.aggregatorLock.RLock()
+	defer c.aggregatorLock.RUnlock()
+
+	val, exists := c.aggregator.Get(slot)
 	if !exists {
 		return []uint64{}
 	}

beacon-chain/cache/committee_ids_test.go

@@ -0,0 +1,56 @@
+package cache
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestCommitteeIDCache_RoundTrip(t *testing.T) {
+	c := newCommitteeIDs()
+	slot := uint64(100)
+	committeeIDs := c.GetAggregatorCommitteeIDs(slot)
+	if len(committeeIDs) != 0 {
+		t.Errorf("Empty cache returned an object: %v", committeeIDs)
+	}
+
+	c.AddAggregatorCommiteeID(slot, 1)
+	res := c.GetAggregatorCommitteeIDs(slot)
+	if !reflect.DeepEqual(res, []uint64{1}) {
+		t.Error("Expected equal value to return from cache")
+	}
+
+	c.AddAggregatorCommiteeID(slot, 2)
+	res = c.GetAggregatorCommitteeIDs(slot)
+	if !reflect.DeepEqual(res, []uint64{1, 2}) {
+		t.Error("Expected equal value to return from cache")
+	}
+
+	c.AddAggregatorCommiteeID(slot, 3)
+	res = c.GetAggregatorCommitteeIDs(slot)
+	if !reflect.DeepEqual(res, []uint64{1, 2, 3}) {
+		t.Error("Expected equal value to return from cache")
+	}
+
+	committeeIDs = c.GetAttesterCommitteeIDs(slot)
+	if len(committeeIDs) != 0 {
+		t.Errorf("Empty cache returned an object: %v", committeeIDs)
+	}
+
+	c.AddAttesterCommiteeID(slot, 11)
+	res = c.GetAttesterCommitteeIDs(slot)
+	if !reflect.DeepEqual(res, []uint64{11}) {
+		t.Error("Expected equal value to return from cache")
+	}
+
+	c.AddAttesterCommiteeID(slot, 22)
+	res = c.GetAttesterCommitteeIDs(slot)
+	if !reflect.DeepEqual(res, []uint64{11, 22}) {
+		t.Error("Expected equal value to return from cache")
+	}
+
+	c.AddAttesterCommiteeID(slot, 33)
+	res = c.GetAttesterCommitteeIDs(slot)
+	if !reflect.DeepEqual(res, []uint64{11, 22, 33}) {
+		t.Error("Expected equal value to return from cache")
+	}
+}

beacon-chain/p2p/BUILD.bazel

@@ -43,6 +43,7 @@ go_library(
         "//shared/iputils:go_default_library",
         "//shared/params:go_default_library",
         "//shared/runutil:go_default_library",
+        "//shared/sliceutil:go_default_library",
         "//shared/traceutil:go_default_library",
         "@com_github_btcsuite_btcd//btcec:go_default_library",
         "@com_github_dgraph_io_ristretto//:go_default_library",

beacon-chain/p2p/service.go

@@ -34,6 +34,7 @@ import (
 	"github.com/prysmaticlabs/prysm/shared"
 	"github.com/prysmaticlabs/prysm/shared/params"
 	"github.com/prysmaticlabs/prysm/shared/runutil"
+	"github.com/prysmaticlabs/prysm/shared/sliceutil"
 	"github.com/sirupsen/logrus"
 )
 
@@ -354,7 +355,13 @@ func (s *Service) RefreshENR(epoch uint64) {
 		return
 	}
 	bitV := bitfield.NewBitvector64()
-	committees := cache.CommitteeIDs.GetIDs(epoch)
+
+	var committees []uint64
+	epochStartSlot := helpers.StartSlot(epoch)
+	for i := epochStartSlot; i < epochStartSlot+2*params.BeaconConfig().SlotsPerEpoch; i++ {
+		committees = append(committees, sliceutil.UnionUint64(cache.CommitteeIDs.GetAttesterCommitteeIDs(i),
+			cache.CommitteeIDs.GetAggregatorCommitteeIDs(i))...)
+	}
 	for _, idx := range committees {
 		bitV.SetBitAt(idx, true)
 	}

beacon-chain/p2p/subnets_test.go

@@ -109,7 +109,7 @@ func TestStartDiscV5_DiscoverPeersWithSubnets(t *testing.T) {
 
 	// Update ENR of a peer.
 	testService := &Service{dv5Listener: listeners[0]}
-	cache.CommitteeIDs.AddIDs([]uint64{10}, 0)
+	cache.CommitteeIDs.AddAttesterCommiteeID(0, 10)
 	testService.RefreshENR(0)
 	time.Sleep(2 * time.Second)
 

beacon-chain/rpc/validator/assignments.go

@@ -4,10 +4,8 @@ import (
 	"context"
 
 	ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
-	"github.com/prysmaticlabs/prysm/beacon-chain/cache"
 	"github.com/prysmaticlabs/prysm/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/beacon-chain/core/state"
-	"github.com/prysmaticlabs/prysm/shared/featureconfig"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )
@@ -87,11 +85,6 @@ func (vs *Server) GetDuties(ctx context.Context, req *ethpb.DutiesRequest) (*eth
 
 	}
 
-	if featureconfig.Get().EnableDynamicCommitteeSubnets {
-		cache.CommitteeIDs.AddIDs(committeeIDs, req.Epoch)
-		cache.CommitteeIDs.AddIDs(nextCommitteeIDs, req.Epoch+1)
-	}
-
 	return &ethpb.DutiesResponse{
 		Duties: validatorAssignments,
 	}, nil

beacon-chain/rpc/validator/attester.go

@@ -4,6 +4,7 @@ import (
 	"context"
 	"time"
 
+	ptypes "github.com/gogo/protobuf/types"
 	ethpb "github.com/prysmaticlabs/ethereumapis/eth/v1alpha1"
 	"github.com/prysmaticlabs/go-ssz"
 	"github.com/prysmaticlabs/prysm/beacon-chain/cache"
@@ -36,12 +37,6 @@ func (vs *Server) GetAttestationData(ctx context.Context, req *ethpb.Attestation
 		trace.Int64Attribute("committeeIndex", int64(req.CommitteeIndex)),
 	)
 
-	// If attestation committee subnets are enabled, we track the committee
-	// index into a cache.
-	if featureconfig.Get().EnableDynamicCommitteeSubnets {
-		cache.CommitteeIDs.AddIDs([]uint64{req.CommitteeIndex}, helpers.SlotToEpoch(req.Slot))
-	}
-
 	if vs.SyncChecker.Syncing() {
 		return nil, status.Errorf(codes.Unavailable, "Syncing to latest head, not ready to respond")
 	}
@@ -159,12 +154,6 @@ func (vs *Server) ProposeAttestation(ctx context.Context, att *ethpb.Attestation
 		return nil, status.Error(codes.InvalidArgument, "Incorrect attestation signature")
 	}
 
-	// If attestation committee subnets are enabled, we track the committee
-	// index into a cache.
-	if featureconfig.Get().EnableDynamicCommitteeSubnets {
-		cache.CommitteeIDs.AddIDs([]uint64{att.Data.CommitteeIndex}, helpers.SlotToEpoch(att.Data.Slot))
-	}
-
 	root, err := ssz.HashTreeRoot(att.Data)
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "Could not tree hash attestation: %v", err)
@@ -235,3 +224,14 @@ func (vs *Server) waitToOneThird(ctx context.Context, slot uint64) {
 		}
 	}
 }
+
+// SubscribeCommitteeSubnet subscribes to the committee ID subnet given subscribe request.
+func (vs *Server) SubscribeCommitteeSubnet(ctx context.Context, req *ethpb.CommitteeSubnetSubscribeRequest) (*ptypes.Empty, error) {
+	cache.CommitteeIDs.AddAttesterCommiteeID(req.Slot, req.CommitteeId)
+
+	if req.IsAggregator {
+		cache.CommitteeIDs.AddAggregatorCommiteeID(req.Slot, req.CommitteeId)
+	}
+
+	return &ptypes.Empty{}, nil
+}

beacon-chain/sync/subscriber_committee_index_beacon_attestation.go

@@ -50,7 +50,7 @@ func (r *Service) committeesCount() int {
 }
 
 func (r *Service) committeeIndices() []uint64 {
-	currentEpoch := helpers.SlotToEpoch(r.chain.HeadSlot())
-	return sliceutil.UnionUint64(cache.CommitteeIDs.GetIDs(currentEpoch),
-		cache.CommitteeIDs.GetIDs(currentEpoch+1))
+	currentSlot := r.chain.CurrentSlot()
+	return sliceutil.UnionUint64(cache.CommitteeIDs.GetAttesterCommitteeIDs(currentSlot),
+		cache.CommitteeIDs.GetAggregatorCommitteeIDs(currentSlot))
 }

third_party/com_github_prysmaticlabs_ethereumapis-tags.patch

@@ -447,7 +447,7 @@ index 8ee263b..60607de 100644
 
      // The epoch for which this set of validator assignments is valid.
 diff --git a/eth/v1alpha1/validator.proto b/eth/v1alpha1/validator.proto
-index 068a04c..80f73b8 100644
+index 3455de7..f4fab59 100644
 --- a/eth/v1alpha1/validator.proto
 +++ b/eth/v1alpha1/validator.proto
 @@ -15,6 +15,7 @@ syntax = "proto3";
@@ -458,7 +458,7 @@ index 068a04c..80f73b8 100644
  import "google/api/annotations.proto";
  import "google/protobuf/empty.proto";
  import "eth/v1alpha1/beacon_block.proto";
-@@ -197,7 +198,7 @@ message DomainResponse {
+@@ -208,7 +209,7 @@ message DomainResponse {
 
  message ValidatorActivationRequest {
      // A list of 48 byte validator public keys.
@@ -467,7 +467,7 @@ index 068a04c..80f73b8 100644
  }
 
  message ValidatorActivationResponse {
-@@ -223,7 +224,7 @@ message ChainStartResponse {
+@@ -234,7 +235,7 @@ message ChainStartResponse {
 
  message ValidatorIndexRequest {
      // A 48 byte validator public key.
@@ -476,7 +476,7 @@ index 068a04c..80f73b8 100644
  }
 
  message ValidatorIndexResponse {
-@@ -233,7 +234,7 @@ message ValidatorIndexResponse {
+@@ -244,7 +245,7 @@ message ValidatorIndexResponse {
 
  message ValidatorStatusRequest {
      // A 48 byte validator public key.
@@ -485,7 +485,7 @@ index 068a04c..80f73b8 100644
  }
 
  enum ValidatorStatus {
-@@ -271,7 +272,7 @@ message DutiesRequest {
+@@ -282,7 +283,7 @@ message DutiesRequest {
      uint64 epoch = 1;
 
      // Array of byte encoded BLS public keys.
@@ -494,7 +494,7 @@ index 068a04c..80f73b8 100644
  }
 
  message DutiesResponse {
-@@ -290,7 +291,7 @@ message DutiesResponse {
+@@ -301,7 +302,7 @@ message DutiesResponse {
          uint64 proposer_slot = 4;
 
          // 48 byte BLS public key for the validator who's assigned to perform a duty.
@@ -503,7 +503,7 @@ index 068a04c..80f73b8 100644
 
          // The current status of the validator assigned to perform the duty.
          ValidatorStatus status = 6;
-@@ -305,15 +306,16 @@ message BlockRequest {
+@@ -316,15 +317,16 @@ message BlockRequest {
      uint64 slot = 1;
 
      // Validator's 32 byte randao reveal secret of the current epoch.
@@ -523,7 +523,7 @@ index 068a04c..80f73b8 100644
  }
 
  message AttestationDataRequest {
-@@ -326,7 +328,7 @@ message AttestationDataRequest {
+@@ -337,7 +339,7 @@ message AttestationDataRequest {
 
  message AttestResponse {
      // The root of the attestation data successfully submitted to the beacon node.
@@ -532,7 +532,7 @@ index 068a04c..80f73b8 100644
  }
 
  message AggregateSelectionRequest {
-@@ -335,10 +337,10 @@ message AggregateSelectionRequest {
+@@ -346,10 +348,10 @@ message AggregateSelectionRequest {
      // Committee index of the validator at the given slot.
      uint64 committee_index = 2;
      // 48 byte public key of the validator.
@@ -545,14 +545,16 @@ index 068a04c..80f73b8 100644
  }
 
  message AggregateSelectionResponse {
-@@ -353,16 +355,16 @@ message SignedAggregateSubmitRequest {
+@@ -364,7 +366,7 @@ message SignedAggregateSubmitRequest {
 
  message SignedAggregateSubmitResponse {
      // The 32 byte hash tree root of the aggregated attestation data.
 -    bytes attestation_data_root = 1;
 +    bytes attestation_data_root = 1  [(gogoproto.moretags) = "ssz-size:\"32\""];
  }
 
+ message CommitteeSubnetSubscribeRequest {
+@@ -381,10 +383,10 @@ message CommitteeSubnetSubscribeRequest {
  // An Ethereum 2.0 validator.
  message Validator {
      // 48 byte BLS public key used for the validator's activities.