Add GenesisValidatorsRoot to GetGenesis (#5619)

* Add GenesisValidatorsRoot to GetGenesis

* Add genesis state

* Add to test

* Change to get val root from genesis fetcher

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

WORKSPACE

@@ -1305,7 +1305,7 @@ go_repository(
 
 go_repository(
     name = "com_github_prysmaticlabs_ethereumapis",
-    commit = "1c66911b2ef3c1a290abb2156bcecb33ac32725f",
+    commit = "ba9042096e9fc49606279513d3e24e5e8cdbd5a0",
     importpath = "github.com/prysmaticlabs/ethereumapis",
 )
 

beacon-chain/node/node.go

@@ -547,6 +547,7 @@ func (b *BeaconNode) registerRPCService(ctx *cli.Context) error {
 		BlockReceiver:         chainService,
 		AttestationReceiver:   chainService,
 		GenesisTimeFetcher:    chainService,
+		GenesisFetcher:        chainService,
 		AttestationsPool:      b.attestationPool,
 		ExitPool:              b.exitPool,
 		SlashingsPool:         b.slashingsPool,

beacon-chain/rpc/node/BUILD.bazel

@@ -29,6 +29,8 @@ go_test(
         "//beacon-chain/db/testing:go_default_library",
         "//beacon-chain/p2p/testing:go_default_library",
         "//beacon-chain/sync/initial-sync/testing:go_default_library",
+        "//shared/bytesutil:go_default_library",
+        "//shared/testutil:go_default_library",
         "//shared/version:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_gogo_protobuf//types:go_default_library",

beacon-chain/rpc/node/server.go

@@ -27,6 +27,7 @@ type Server struct {
 	BeaconDB           db.ReadOnlyDatabase
 	PeersFetcher       p2p.PeersProvider
 	GenesisTimeFetcher blockchain.TimeFetcher
+	GenesisFetcher     blockchain.GenesisFetcher
 }
 
 // GetSyncStatus checks the current network sync status of the node.
@@ -47,9 +48,11 @@ func (ns *Server) GetGenesis(ctx context.Context, _ *ptypes.Empty) (*ethpb.Genes
 	if err != nil {
 		return nil, status.Errorf(codes.Internal, "Could not convert genesis time to proto: %v", err)
 	}
+	genValRoot := ns.GenesisFetcher.GenesisValidatorRoot()
 	return &ethpb.Genesis{
 		GenesisTime:            gt,
 		DepositContractAddress: contractAddr,
+		GenesisValidatorsRoot:  genValRoot[:],
 	}, nil
 }
 

beacon-chain/rpc/node/server_test.go

@@ -13,6 +13,8 @@ import (
 	dbutil "github.com/prysmaticlabs/prysm/beacon-chain/db/testing"
 	mockP2p "github.com/prysmaticlabs/prysm/beacon-chain/p2p/testing"
 	mockSync "github.com/prysmaticlabs/prysm/beacon-chain/sync/initial-sync/testing"
+	"github.com/prysmaticlabs/prysm/shared/bytesutil"
+	"github.com/prysmaticlabs/prysm/shared/testutil"
 	"github.com/prysmaticlabs/prysm/shared/version"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/reflection"
@@ -48,9 +50,15 @@ func TestNodeServer_GetGenesis(t *testing.T) {
 	if err := db.SaveDepositContractAddress(ctx, addr); err != nil {
 		t.Fatal(err)
 	}
+	st := testutil.NewBeaconState()
+	genValRoot := bytesutil.ToBytes32([]byte("I am root"))
 	ns := &Server{
 		BeaconDB:           db,
 		GenesisTimeFetcher: &mock.ChainService{Genesis: time.Unix(0, 0)},
+		GenesisFetcher: &mock.ChainService{
+			State:          st,
+			ValidatorsRoot: genValRoot,
+		},
 	}
 	res, err := ns.GetGenesis(context.Background(), &ptypes.Empty{})
 	if err != nil {
@@ -66,6 +74,9 @@ func TestNodeServer_GetGenesis(t *testing.T) {
 	if !res.GenesisTime.Equal(pUnix) {
 		t.Errorf("Wanted GenesisTime() = %v, received %v", pUnix, res.GenesisTime)
 	}
+	if !bytes.Equal(genValRoot[:], res.GenesisValidatorsRoot) {
+		t.Errorf("Wanted GenesisValidatorsRoot = %v, received %v", genValRoot, res.GenesisValidatorsRoot)
+	}
 }
 
 func TestNodeServer_GetVersion(t *testing.T) {

beacon-chain/rpc/service.go

@@ -59,6 +59,7 @@ type Service struct {
 	finalizationFetcher    blockchain.FinalizationFetcher
 	participationFetcher   blockchain.ParticipationFetcher
 	genesisTimeFetcher     blockchain.TimeFetcher
+	genesisFetcher         blockchain.GenesisFetcher
 	attestationReceiver    blockchain.AttestationReceiver
 	blockReceiver          blockchain.BlockReceiver
 	powChainService        powchain.Chain
@@ -108,6 +109,7 @@ type Config struct {
 	POWChainService       powchain.Chain
 	ChainStartFetcher     powchain.ChainStartFetcher
 	GenesisTimeFetcher    blockchain.TimeFetcher
+	GenesisFetcher        blockchain.GenesisFetcher
 	MockEth1Votes         bool
 	AttestationsPool      attestations.Pool
 	ExitPool              *voluntaryexits.Pool
@@ -138,6 +140,7 @@ func NewService(ctx context.Context, cfg *Config) *Service {
 		finalizationFetcher:   cfg.FinalizationFetcher,
 		participationFetcher:  cfg.ParticipationFetcher,
 		genesisTimeFetcher:    cfg.GenesisTimeFetcher,
+		genesisFetcher:        cfg.GenesisFetcher,
 		attestationReceiver:   cfg.AttestationReceiver,
 		blockReceiver:         cfg.BlockReceiver,
 		p2p:                   cfg.Broadcaster,
@@ -241,6 +244,7 @@ func (s *Service) Start() {
 		SyncChecker:        s.syncService,
 		GenesisTimeFetcher: s.genesisTimeFetcher,
 		PeersFetcher:       s.peersFetcher,
+		GenesisFetcher:     s.genesisFetcher,
 	}
 	beaconChainServer := &beacon.Server{
 		Ctx:                         s.ctx,