adapt to all the divergent changes between peerDAS and peerdas-sync

* Rename various variables/functions to be more clear

* Add changelog fragment

---------

Co-authored-by: Bastin <43618253+Inspector-Butters@users.noreply.github.com>

api/client/beacon/BUILD.bazel

@@ -16,7 +16,6 @@ go_library(
         "//api/server/structs:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",

api/client/beacon/client.go

@@ -9,7 +9,6 @@ import (
 	"net/url"
 	"path"
 	"regexp"
-	"sort"
 	"strconv"
 
 	"github.com/OffchainLabs/prysm/v6/api/client"
@@ -17,7 +16,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
@@ -137,24 +135,6 @@ func (c *Client) GetFork(ctx context.Context, stateId StateOrBlockId) (*ethpb.Fo
 	return fr.ToConsensus()
 }
 
-// GetForkSchedule retrieve all forks, past present and future, of which this node is aware.
-func (c *Client) GetForkSchedule(ctx context.Context) (forks.OrderedSchedule, error) {
-	body, err := c.Get(ctx, getForkSchedulePath)
-	if err != nil {
-		return nil, errors.Wrap(err, "error requesting fork schedule")
-	}
-	fsr := &forkScheduleResponse{}
-	err = json.Unmarshal(body, fsr)
-	if err != nil {
-		return nil, err
-	}
-	ofs, err := fsr.OrderedForkSchedule()
-	if err != nil {
-		return nil, errors.Wrap(err, fmt.Sprintf("problem unmarshaling %s response", getForkSchedulePath))
-	}
-	return ofs, nil
-}
-
 // GetConfigSpec retrieve the current configs of the network used by the beacon node.
 func (c *Client) GetConfigSpec(ctx context.Context) (*structs.GetSpecResponse, error) {
 	body, err := c.Get(ctx, getConfigSpecPath)
@@ -334,31 +314,3 @@ func (c *Client) GetBLStoExecutionChanges(ctx context.Context) (*structs.BLSToEx
 	}
 	return poolResponse, nil
 }
-
-type forkScheduleResponse struct {
-	Data []structs.Fork
-}
-
-func (fsr *forkScheduleResponse) OrderedForkSchedule() (forks.OrderedSchedule, error) {
-	ofs := make(forks.OrderedSchedule, 0)
-	for _, d := range fsr.Data {
-		epoch, err := strconv.ParseUint(d.Epoch, 10, 64)
-		if err != nil {
-			return nil, errors.Wrapf(err, "error parsing epoch %s", d.Epoch)
-		}
-		vSlice, err := hexutil.Decode(d.CurrentVersion)
-		if err != nil {
-			return nil, err
-		}
-		if len(vSlice) != 4 {
-			return nil, fmt.Errorf("got %d byte version, expected 4 bytes. version hex=%s", len(vSlice), d.CurrentVersion)
-		}
-		version := bytesutil.ToBytes4(vSlice)
-		ofs = append(ofs, forks.ForkScheduleEntry{
-			Version: version,
-			Epoch:   primitives.Epoch(epoch),
-		})
-	}
-	sort.Sort(ofs)
-	return ofs, nil
-}

api/client/builder/client.go

@@ -102,6 +102,7 @@ type BuilderClient interface {
 	GetHeader(ctx context.Context, slot primitives.Slot, parentHash [32]byte, pubkey [48]byte) (SignedBid, error)
 	RegisterValidator(ctx context.Context, svr []*ethpb.SignedValidatorRegistrationV1) error
 	SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, v1.BlobsBundler, error)
+	SubmitBlindedBlockPostFulu(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) error
 	Status(ctx context.Context) error
 }
 
@@ -152,7 +153,8 @@ func (c *Client) NodeURL() string {
 type reqOption func(*http.Request)
 
 // do is a generic, opinionated request function to reduce boilerplate amongst the methods in this package api/client/builder.
-func (c *Client) do(ctx context.Context, method string, path string, body io.Reader, opts ...reqOption) (res []byte, header http.Header, err error) {
+// It validates that the HTTP response status matches the expectedStatus parameter.
+func (c *Client) do(ctx context.Context, method string, path string, body io.Reader, expectedStatus int, opts ...reqOption) (res []byte, header http.Header, err error) {
 	ctx, span := trace.StartSpan(ctx, "builder.client.do")
 	defer func() {
 		tracing.AnnotateError(span, err)
@@ -187,8 +189,8 @@ func (c *Client) do(ctx context.Context, method string, path string, body io.Rea
 			log.WithError(closeErr).Error("Failed to close response body")
 		}
 	}()
-	if r.StatusCode != http.StatusOK {
-		err = non200Err(r)
+	if r.StatusCode != expectedStatus {
+		err = unexpectedStatusErr(r, expectedStatus)
 		return
 	}
 	res, err = io.ReadAll(io.LimitReader(r.Body, client.MaxBodySize))
@@ -236,7 +238,7 @@ func (c *Client) GetHeader(ctx context.Context, slot primitives.Slot, parentHash
 			r.Header.Set("Accept", api.JsonMediaType)
 		}
 	}
-	data, header, err := c.do(ctx, http.MethodGet, path, nil, getOpts)
+	data, header, err := c.do(ctx, http.MethodGet, path, nil, http.StatusOK, getOpts)
 	if err != nil {
 		return nil, errors.Wrap(err, "error getting header from builder server")
 	}
@@ -409,7 +411,7 @@ func (c *Client) RegisterValidator(ctx context.Context, svr []*ethpb.SignedValid
 		}
 	}
 
-	if _, _, err = c.do(ctx, http.MethodPost, postRegisterValidatorPath, bytes.NewBuffer(body), postOpts); err != nil {
+	if _, _, err = c.do(ctx, http.MethodPost, postRegisterValidatorPath, bytes.NewBuffer(body), http.StatusOK, postOpts); err != nil {
 		return errors.Wrap(err, "do")
 	}
 	log.WithField("registrationCount", len(svr)).Debug("Successfully registered validator(s) on builder")
@@ -471,7 +473,7 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 
 	// post the blinded block - the execution payload response should contain the unblinded payload, along with the
 	// blobs bundle if it is post deneb.
-	data, header, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), postOpts)
+	data, header, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), http.StatusOK, postOpts)
 	if err != nil {
 		return nil, nil, errors.Wrap(err, "error posting the blinded block to the builder api")
 	}
@@ -501,6 +503,24 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 	return ed, blobs, nil
 }
 
+// SubmitBlindedBlockPostFulu calls the builder API endpoint post-Fulu where relays only return status codes.
+// This method is used after the Fulu fork when MEV-boost relays no longer return execution payloads.
+func (c *Client) SubmitBlindedBlockPostFulu(ctx context.Context, sb interfaces.ReadOnlySignedBeaconBlock) error {
+	body, postOpts, err := c.buildBlindedBlockRequest(sb)
+	if err != nil {
+		return err
+	}
+
+	// Post the blinded block - the response should only contain a status code (no payload)
+	_, _, err = c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), http.StatusAccepted, postOpts)
+	if err != nil {
+		return errors.Wrap(err, "error posting the blinded block to the builder api post-Fulu")
+	}
+
+	// Success is indicated by no error (status 202)
+	return nil
+}
+
 func (c *Client) checkBlockVersion(respBytes []byte, header http.Header) (int, error) {
 	var versionHeader string
 	if c.sszEnabled {
@@ -657,11 +677,11 @@ func (c *Client) Status(ctx context.Context) error {
 	getOpts := func(r *http.Request) {
 		r.Header.Set("Accept", api.JsonMediaType)
 	}
-	_, _, err := c.do(ctx, http.MethodGet, getStatus, nil, getOpts)
+	_, _, err := c.do(ctx, http.MethodGet, getStatus, nil, http.StatusOK, getOpts)
 	return err
 }
 
-func non200Err(response *http.Response) error {
+func unexpectedStatusErr(response *http.Response, expected int) error {
 	bodyBytes, err := io.ReadAll(io.LimitReader(response.Body, client.MaxErrBodySize))
 	var errMessage ErrorMessage
 	var body string
@@ -670,7 +690,7 @@ func non200Err(response *http.Response) error {
 	} else {
 		body = "response body:\n" + string(bodyBytes)
 	}
-	msg := fmt.Sprintf("code=%d, url=%s, body=%s", response.StatusCode, response.Request.URL, body)
+	msg := fmt.Sprintf("expected=%d, got=%d, url=%s, body=%s", expected, response.StatusCode, response.Request.URL, body)
 	switch response.StatusCode {
 	case http.StatusUnsupportedMediaType:
 		log.WithError(ErrUnsupportedMediaType).Debug(msg)

api/client/builder/client_test.go

@@ -1555,6 +1555,89 @@ func testSignedBlindedBeaconBlockElectra(t *testing.T) *eth.SignedBlindedBeaconB
 	}
 }
 
+func TestSubmitBlindedBlockPostFulu(t *testing.T) {
+	ctx := t.Context()
+
+	t.Run("success", func(t *testing.T) {
+		hc := &http.Client{
+			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
+				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
+				require.Equal(t, "bellatrix", r.Header.Get("Eth-Consensus-Version"))
+				require.Equal(t, api.JsonMediaType, r.Header.Get("Content-Type"))
+				require.Equal(t, api.JsonMediaType, r.Header.Get("Accept"))
+				// Post-Fulu: only return status code, no payload
+				return &http.Response{
+					StatusCode: http.StatusAccepted,
+					Body:       io.NopCloser(bytes.NewBufferString("")),
+					Request:    r.Clone(ctx),
+				}, nil
+			}),
+		}
+		c := &Client{
+			hc:      hc,
+			baseURL: &url.URL{Host: "localhost:3500", Scheme: "http"},
+		}
+		sbbb, err := blocks.NewSignedBeaconBlock(testSignedBlindedBeaconBlockBellatrix(t))
+		require.NoError(t, err)
+		err = c.SubmitBlindedBlockPostFulu(ctx, sbbb)
+		require.NoError(t, err)
+	})
+
+	t.Run("success_ssz", func(t *testing.T) {
+		hc := &http.Client{
+			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
+				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
+				require.Equal(t, "bellatrix", r.Header.Get(api.VersionHeader))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Content-Type"))
+				require.Equal(t, api.OctetStreamMediaType, r.Header.Get("Accept"))
+				// Post-Fulu: only return status code, no payload
+				return &http.Response{
+					StatusCode: http.StatusAccepted,
+					Body:       io.NopCloser(bytes.NewBufferString("")),
+					Request:    r.Clone(ctx),
+				}, nil
+			}),
+		}
+		c := &Client{
+			hc:         hc,
+			baseURL:    &url.URL{Host: "localhost:3500", Scheme: "http"},
+			sszEnabled: true,
+		}
+		sbbb, err := blocks.NewSignedBeaconBlock(testSignedBlindedBeaconBlockBellatrix(t))
+		require.NoError(t, err)
+		err = c.SubmitBlindedBlockPostFulu(ctx, sbbb)
+		require.NoError(t, err)
+	})
+
+	t.Run("error_response", func(t *testing.T) {
+		hc := &http.Client{
+			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
+				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
+				require.Equal(t, "bellatrix", r.Header.Get("Eth-Consensus-Version"))
+				message := ErrorMessage{
+					Code:    400,
+					Message: "Bad Request",
+				}
+				resp, err := json.Marshal(message)
+				require.NoError(t, err)
+				return &http.Response{
+					StatusCode: http.StatusBadRequest,
+					Body:       io.NopCloser(bytes.NewBuffer(resp)),
+					Request:    r.Clone(ctx),
+				}, nil
+			}),
+		}
+		c := &Client{
+			hc:      hc,
+			baseURL: &url.URL{Host: "localhost:3500", Scheme: "http"},
+		}
+		sbbb, err := blocks.NewSignedBeaconBlock(testSignedBlindedBeaconBlockBellatrix(t))
+		require.NoError(t, err)
+		err = c.SubmitBlindedBlockPostFulu(ctx, sbbb)
+		require.ErrorIs(t, err, ErrNotOK)
+	})
+}
+
 func TestRequestLogger(t *testing.T) {
 	wo := WithObserver(&requestLogger{})
 	c, err := NewClient("localhost:3500", wo)
@@ -1727,7 +1810,7 @@ func TestSubmitBlindedBlock_BlobsBundlerInterface(t *testing.T) {
 	t.Run("Interface signature verification", func(t *testing.T) {
 		// This test verifies that the SubmitBlindedBlock method signature
 		// has been updated to return BlobsBundler interface
-		
+
 		client := &Client{}
 
 		// Verify the method exists with the correct signature

api/client/builder/testing/mock.go

@@ -45,6 +45,11 @@ func (MockClient) SubmitBlindedBlock(_ context.Context, _ interfaces.ReadOnlySig
 	return nil, nil, nil
 }
 
+// SubmitBlindedBlockPostFulu --
+func (MockClient) SubmitBlindedBlockPostFulu(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) error {
+	return nil
+}
+
 // Status --
 func (MockClient) Status(_ context.Context) error {
 	return nil

api/client/builder/types_test.go

@@ -1699,7 +1699,7 @@ func TestExecutionPayloadHeaderCapellaRoundtrip(t *testing.T) {
 	require.DeepEqual(t, string(expected[0:len(expected)-1]), string(m))
 }
 
-func TestErrorMessage_non200Err(t *testing.T) {
+func TestErrorMessage_unexpectedStatusErr(t *testing.T) {
 	mockRequest := &http.Request{
 		URL: &url.URL{Path: "example.com"},
 	}
@@ -1779,7 +1779,7 @@ func TestErrorMessage_non200Err(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			err := non200Err(tt.args)
+			err := unexpectedStatusErr(tt.args, http.StatusOK)
 			if err != nil && tt.wantMessage != "" {
 				require.ErrorContains(t, tt.wantMessage, err)
 			}

beacon-chain/blockchain/BUILD.bazel

@@ -182,6 +182,7 @@ go_test(
         "//container/trie:go_default_library",
         "//crypto/bls:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//genesis:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/eth/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",

beacon-chain/blockchain/chain_info_test.go

@@ -14,6 +14,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -624,6 +625,7 @@ func Test_hashForGenesisRoot(t *testing.T) {
 	ctx := t.Context()
 	c := setupBeaconChain(t, beaconDB)
 	st, _ := util.DeterministicGenesisStateElectra(t, 10)
+	genesis.StoreDuringTest(t, genesis.GenesisData{State: st})
 	require.NoError(t, c.cfg.BeaconDB.SaveGenesisData(ctx, st))
 	root, err := beaconDB.GenesisBlockRoot(ctx)
 	require.NoError(t, err)

beacon-chain/blockchain/execution_engine_test.go

@@ -19,6 +19,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	v1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -309,6 +310,7 @@ func Test_NotifyForkchoiceUpdate_NIlLVH(t *testing.T) {
 		block: wba,
 	}
 
+	genesis.StoreStateDuringTest(t, st)
 	require.NoError(t, beaconDB.SaveState(ctx, st, bra))
 	require.NoError(t, beaconDB.SaveGenesisBlockRoot(ctx, bra))
 	a := &fcuConfig{
@@ -403,6 +405,7 @@ func Test_NotifyForkchoiceUpdateRecursive_DoublyLinkedTree(t *testing.T) {
 	require.NoError(t, err)
 
 	bState, _ := util.DeterministicGenesisState(t, 10)
+	genesis.StoreStateDuringTest(t, bState)
 	require.NoError(t, beaconDB.SaveState(ctx, bState, bra))
 	require.NoError(t, fcs.InsertNode(ctx, state, blkRoot))
 	state, blkRoot, err = prepareForkchoiceState(ctx, 2, brb, bra, [32]byte{'B'}, ojc, ofc)

beacon-chain/blockchain/kzg/validation.go

@@ -6,20 +6,20 @@ import (
 )
 
 // Verify performs single or batch verification of commitments depending on the number of given BlobSidecars.
-func Verify(sidecars ...blocks.ROBlob) error {
-	if len(sidecars) == 0 {
+func Verify(blobSidecars ...blocks.ROBlob) error {
+	if len(blobSidecars) == 0 {
 		return nil
 	}
-	if len(sidecars) == 1 {
+	if len(blobSidecars) == 1 {
 		return kzgContext.VerifyBlobKZGProof(
-			bytesToBlob(sidecars[0].Blob),
-			bytesToCommitment(sidecars[0].KzgCommitment),
-			bytesToKZGProof(sidecars[0].KzgProof))
+			bytesToBlob(blobSidecars[0].Blob),
+			bytesToCommitment(blobSidecars[0].KzgCommitment),
+			bytesToKZGProof(blobSidecars[0].KzgProof))
 	}
-	blobs := make([]GoKZG.Blob, len(sidecars))
-	cmts := make([]GoKZG.KZGCommitment, len(sidecars))
-	proofs := make([]GoKZG.KZGProof, len(sidecars))
-	for i, sidecar := range sidecars {
+	blobs := make([]GoKZG.Blob, len(blobSidecars))
+	cmts := make([]GoKZG.KZGCommitment, len(blobSidecars))
+	proofs := make([]GoKZG.KZGProof, len(blobSidecars))
+	for i, sidecar := range blobSidecars {
 		blobs[i] = *bytesToBlob(sidecar.Blob)
 		cmts[i] = bytesToCommitment(sidecar.KzgCommitment)
 		proofs[i] = bytesToKZGProof(sidecar.KzgProof)

beacon-chain/blockchain/kzg/validation_test.go

@@ -22,8 +22,8 @@ func GenerateCommitmentAndProof(blob GoKZG.Blob) (GoKZG.KZGCommitment, GoKZG.KZG
 }
 
 func TestVerify(t *testing.T) {
-	sidecars := make([]blocks.ROBlob, 0)
-	require.NoError(t, Verify(sidecars...))
+	blobSidecars := make([]blocks.ROBlob, 0)
+	require.NoError(t, Verify(blobSidecars...))
 }
 
 func TestBytesToAny(t *testing.T) {

beacon-chain/blockchain/process_block.go

@@ -133,7 +133,7 @@ func getStateVersionAndPayload(st state.BeaconState) (int, interfaces.ExecutionD
 	return preStateVersion, preStateHeader, nil
 }
 
-func (s *Service) onBlockBatch(ctx context.Context, blks []consensusblocks.ROBlock, avs das.AvailabilityStore) error {
+func (s *Service) onBlockBatch(ctx context.Context, blks []consensusblocks.ROBlock, avs das.AvailabilityChecker) error {
 	ctx, span := trace.StartSpan(ctx, "blockChain.onBlockBatch")
 	defer span.End()
 
@@ -240,9 +240,10 @@ func (s *Service) onBlockBatch(ctx context.Context, blks []consensusblocks.ROBlo
 			}
 		}
 
-		if err := avs.IsDataAvailable(ctx, s.CurrentSlot(), b); err != nil {
-			return errors.Wrapf(err, "could not validate sidecar availability at slot %d", b.Block().Slot())
+		if err := s.areSidecarsAvailable(ctx, avs, b); err != nil {
+			return errors.Wrapf(err, "could not validate sidecar availability for block %#x at slot %d", b.Root(), b.Block().Slot())
 		}
+
 		args := &forkchoicetypes.BlockAndCheckpoints{Block: b,
 			JustifiedCheckpoint: jCheckpoints[i],
 			FinalizedCheckpoint: fCheckpoints[i]}
@@ -308,6 +309,30 @@ func (s *Service) onBlockBatch(ctx context.Context, blks []consensusblocks.ROBlo
 	return s.saveHeadNoDB(ctx, lastB, lastBR, preState, !isValidPayload)
 }
 
+func (s *Service) areSidecarsAvailable(ctx context.Context, avs das.AvailabilityChecker, roBlock consensusblocks.ROBlock) error {
+	blockVersion := roBlock.Version()
+	block := roBlock.Block()
+	slot := block.Slot()
+
+	if blockVersion >= version.Fulu {
+		if err := s.areDataColumnsAvailable(ctx, roBlock.Root(), block); err != nil {
+			return errors.Wrapf(err, "are data columns available for block %#x with slot %d", roBlock.Root(), slot)
+		}
+
+		return nil
+	}
+
+	if blockVersion >= version.Deneb {
+		if err := avs.IsDataAvailable(ctx, s.CurrentSlot(), roBlock); err != nil {
+			return errors.Wrapf(err, "could not validate sidecar availability at slot %d", slot)
+		}
+
+		return nil
+	}
+
+	return nil
+}
+
 func (s *Service) updateEpochBoundaryCaches(ctx context.Context, st state.BeaconState) error {
 	e := coreTime.CurrentEpoch(st)
 	if err := helpers.UpdateCommitteeCache(ctx, st, e); err != nil {
@@ -584,7 +609,7 @@ func (s *Service) runLateBlockTasks() {
 // It returns a map where each key represents a missing BlobSidecar index.
 // An empty map means we have all indices; a non-empty map can be used to compare incoming
 // BlobSidecars against the set of known missing sidecars.
-func missingBlobIndices(bs *filesystem.BlobStorage, root [fieldparams.RootLength]byte, expected [][]byte, slot primitives.Slot) (map[uint64]bool, error) {
+func missingBlobIndices(store *filesystem.BlobStorage, root [fieldparams.RootLength]byte, expected [][]byte, slot primitives.Slot) (map[uint64]bool, error) {
 	maxBlobsPerBlock := params.BeaconConfig().MaxBlobsPerBlock(slot)
 	if len(expected) == 0 {
 		return nil, nil
@@ -592,7 +617,7 @@ func missingBlobIndices(bs *filesystem.BlobStorage, root [fieldparams.RootLength
 	if len(expected) > maxBlobsPerBlock {
 		return nil, errMaxBlobsExceeded
 	}
-	indices := bs.Summary(root)
+	indices := store.Summary(root)
 	missing := make(map[uint64]bool, len(expected))
 	for i := range expected {
 		if len(expected[i]) > 0 && !indices.HasIndex(uint64(i)) {
@@ -607,7 +632,7 @@ func missingBlobIndices(bs *filesystem.BlobStorage, root [fieldparams.RootLength
 // It returns a map where each key represents a missing DataColumnSidecar index.
 // An empty map means we have all indices; a non-empty map can be used to compare incoming
 // DataColumns against the set of known missing sidecars.
-func missingDataColumnIndices(bs *filesystem.DataColumnStorage, root [fieldparams.RootLength]byte, expected map[uint64]bool) (map[uint64]bool, error) {
+func missingDataColumnIndices(store *filesystem.DataColumnStorage, root [fieldparams.RootLength]byte, expected map[uint64]bool) (map[uint64]bool, error) {
 	if len(expected) == 0 {
 		return nil, nil
 	}
@@ -619,7 +644,7 @@ func missingDataColumnIndices(bs *filesystem.DataColumnStorage, root [fieldparam
 	}
 
 	// Get a summary of the data columns stored in the database.
-	summary := bs.Summary(root)
+	summary := store.Summary(root)
 
 	// Check all expected data columns against the summary.
 	missing := make(map[uint64]bool)
@@ -717,7 +742,7 @@ func (s *Service) areDataColumnsAvailable(
 	summary := s.dataColumnStorage.Summary(root)
 	storedDataColumnsCount := summary.Count()
 
-	minimumColumnCountToReconstruct := peerdas.MinimumColumnsCountToReconstruct()
+	minimumColumnCountToReconstruct := peerdas.MinimumColumnCountToReconstruct()
 
 	// As soon as we have enough data column sidecars, we can reconstruct the missing ones.
 	// We don't need to wait for the rest of the data columns to declare the block as available.
@@ -820,7 +845,7 @@ func (s *Service) areDataColumnsAvailable(
 				missingIndices = uint64MapToSortedSlice(missingMap)
 			}
 
-			return errors.Wrapf(ctx.Err(), "data column sidecars slot: %d, BlockRoot: %#x, missing %v", block.Slot(), root, missingIndices)
+			return errors.Wrapf(ctx.Err(), "data column sidecars slot: %d, BlockRoot: %#x, missing: %v", block.Slot(), root, missingIndices)
 		}
 	}
 }

beacon-chain/blockchain/process_block_test.go

@@ -35,6 +35,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
@@ -1980,14 +1981,15 @@ func TestNoViableHead_Reboot(t *testing.T) {
 	genesisState, keys := util.DeterministicGenesisState(t, 64)
 	stateRoot, err := genesisState.HashTreeRoot(ctx)
 	require.NoError(t, err, "Could not hash genesis state")
-	genesis := blocks.NewGenesisBlock(stateRoot[:])
-	wsb, err := consensusblocks.NewSignedBeaconBlock(genesis)
+	gb := blocks.NewGenesisBlock(stateRoot[:])
+	wsb, err := consensusblocks.NewSignedBeaconBlock(gb)
 	require.NoError(t, err)
-	genesisRoot, err := genesis.Block.HashTreeRoot()
+	genesisRoot, err := gb.Block.HashTreeRoot()
 	require.NoError(t, err, "Could not get signing root")
 	require.NoError(t, service.cfg.BeaconDB.SaveBlock(ctx, wsb), "Could not save genesis block")
 	require.NoError(t, service.saveGenesisData(ctx, genesisState))
 
+	genesis.StoreStateDuringTest(t, genesisState)
 	require.NoError(t, service.cfg.BeaconDB.SaveState(ctx, genesisState, genesisRoot), "Could not save genesis state")
 	require.NoError(t, service.cfg.BeaconDB.SaveHeadBlockRoot(ctx, genesisRoot), "Could not save genesis state")
 	require.NoError(t, service.cfg.BeaconDB.SaveGenesisBlockRoot(ctx, genesisRoot), "Could not save genesis state")
@@ -2887,7 +2889,7 @@ func TestIsDataAvailable(t *testing.T) {
 	})
 
 	t.Run("Fulu - more than half of the columns in custody", func(t *testing.T) {
-		minimumColumnsCountToReconstruct := peerdas.MinimumColumnsCountToReconstruct()
+		minimumColumnsCountToReconstruct := peerdas.MinimumColumnCountToReconstruct()
 		indices := make([]uint64, 0, minimumColumnsCountToReconstruct)
 		for i := range minimumColumnsCountToReconstruct {
 			indices = append(indices, i)
@@ -2972,7 +2974,7 @@ func TestIsDataAvailable(t *testing.T) {
 
 		startWaiting := make(chan bool)
 
-		minimumColumnsCountToReconstruct := peerdas.MinimumColumnsCountToReconstruct()
+		minimumColumnsCountToReconstruct := peerdas.MinimumColumnCountToReconstruct()
 		indices := make([]uint64, 0, minimumColumnsCountToReconstruct-missingColumns)
 
 		for i := range minimumColumnsCountToReconstruct - missingColumns {

beacon-chain/blockchain/receive_block.go

@@ -40,8 +40,8 @@ var epochsSinceFinalityExpandCache = primitives.Epoch(4)
 
 // BlockReceiver interface defines the methods of chain service for receiving and processing new blocks.
 type BlockReceiver interface {
-	ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte, avs das.AvailabilityStore) error
-	ReceiveBlockBatch(ctx context.Context, blocks []blocks.ROBlock, avs das.AvailabilityStore) error
+	ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte, avs das.AvailabilityChecker) error
+	ReceiveBlockBatch(ctx context.Context, blocks []blocks.ROBlock, avs das.AvailabilityChecker) error
 	HasBlock(ctx context.Context, root [32]byte) bool
 	RecentBlockSlot(root [32]byte) (primitives.Slot, error)
 	BlockBeingSynced([32]byte) bool
@@ -70,7 +70,7 @@ type SlashingReceiver interface {
 //  1. Validate block, apply state transition and update checkpoints
 //  2. Apply fork choice to the processed block
 //  3. Save latest head info
-func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte, avs das.AvailabilityStore) error {
+func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte, avs das.AvailabilityChecker) error {
 	ctx, span := trace.StartSpan(ctx, "blockChain.ReceiveBlock")
 	defer span.End()
 	// Return early if the block is blacklisted
@@ -244,7 +244,7 @@ func (s *Service) handleDA(
 	ctx context.Context,
 	block interfaces.SignedBeaconBlock,
 	blockRoot [fieldparams.RootLength]byte,
-	avs das.AvailabilityStore,
+	avs das.AvailabilityChecker,
 ) (elapsed time.Duration, err error) {
 	defer func(start time.Time) {
 		elapsed = time.Since(start)
@@ -333,7 +333,7 @@ func (s *Service) executePostFinalizationTasks(ctx context.Context, finalizedSta
 // ReceiveBlockBatch processes the whole block batch at once, assuming the block batch is linear ,transitioning
 // the state, performing batch verification of all collected signatures and then performing the appropriate
 // actions for a block post-transition.
-func (s *Service) ReceiveBlockBatch(ctx context.Context, blocks []blocks.ROBlock, avs das.AvailabilityStore) error {
+func (s *Service) ReceiveBlockBatch(ctx context.Context, blocks []blocks.ROBlock, avs das.AvailabilityChecker) error {
 	ctx, span := trace.StartSpan(ctx, "blockChain.ReceiveBlockBatch")
 	defer span.End()
 

beacon-chain/blockchain/receive_data_column.go

@@ -17,7 +17,7 @@ func (s *Service) ReceiveDataColumns(dataColumnSidecars []blocks.VerifiedRODataC
 // ReceiveDataColumn receives a single data column.
 func (s *Service) ReceiveDataColumn(dataColumnSidecar blocks.VerifiedRODataColumn) error {
 	if err := s.dataColumnStorage.Save([]blocks.VerifiedRODataColumn{dataColumnSidecar}); err != nil {
-		return errors.Wrap(err, "save data column sidecars")
+		return errors.Wrap(err, "save data column sidecar")
 	}
 
 	return nil

beacon-chain/blockchain/service.go

@@ -12,7 +12,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/async/event"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/kzg"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/cache"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/feed"
 	statefeed "github.com/OffchainLabs/prysm/v6/beacon-chain/core/feed/state"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	lightClient "github.com/OffchainLabs/prysm/v6/beacon-chain/core/light-client"
@@ -207,17 +206,9 @@ func NewService(ctx context.Context, opts ...Option) (*Service, error) {
 
 // Start a blockchain service's main event loop.
 func (s *Service) Start() {
-	saved := s.cfg.FinalizedStateAtStartUp
 	defer s.removeStartupState()
-
-	if saved != nil && !saved.IsNil() {
-		if err := s.StartFromSavedState(saved); err != nil {
-			log.Fatal(err)
-		}
-	} else {
-		if err := s.startFromExecutionChain(); err != nil {
-			log.Fatal(err)
-		}
+	if err := s.StartFromSavedState(s.cfg.FinalizedStateAtStartUp); err != nil {
+		log.Fatal(err)
 	}
 	s.spawnProcessAttestationsRoutine()
 	go s.runLateBlockTasks()
@@ -266,6 +257,9 @@ func (s *Service) Status() error {
 
 // StartFromSavedState initializes the blockchain using a previously saved finalized checkpoint.
 func (s *Service) StartFromSavedState(saved state.BeaconState) error {
+	if state.IsNil(saved) {
+		return errors.New("Last finalized state at startup is nil")
+	}
 	log.Info("Blockchain data already exists in DB, initializing...")
 	s.genesisTime = saved.GenesisTime()
 	s.cfg.AttService.SetGenesisTime(saved.GenesisTime())
@@ -371,62 +365,6 @@ func (s *Service) initializeHead(ctx context.Context, st state.BeaconState) erro
 	return nil
 }
 
-func (s *Service) startFromExecutionChain() error {
-	log.Info("Waiting to reach the validator deposit threshold to start the beacon chain...")
-	if s.cfg.ChainStartFetcher == nil {
-		return errors.New("not configured execution chain")
-	}
-	go func() {
-		stateChannel := make(chan *feed.Event, 1)
-		stateSub := s.cfg.StateNotifier.StateFeed().Subscribe(stateChannel)
-		defer stateSub.Unsubscribe()
-		for {
-			select {
-			case e := <-stateChannel:
-				if e.Type == statefeed.ChainStarted {
-					data, ok := e.Data.(*statefeed.ChainStartedData)
-					if !ok {
-						log.Error("Event data is not type *statefeed.ChainStartedData")
-						return
-					}
-					log.WithField("startTime", data.StartTime).Debug("Received chain start event")
-					s.onExecutionChainStart(s.ctx, data.StartTime)
-					return
-				}
-			case <-s.ctx.Done():
-				log.Debug("Context closed, exiting goroutine")
-				return
-			case err := <-stateSub.Err():
-				log.WithError(err).Error("Subscription to state forRoot failed")
-				return
-			}
-		}
-	}()
-
-	return nil
-}
-
-// onExecutionChainStart initializes a series of deposits from the ChainStart deposits in the eth1
-// deposit contract, initializes the beacon chain's state, and kicks off the beacon chain.
-func (s *Service) onExecutionChainStart(ctx context.Context, genesisTime time.Time) {
-	preGenesisState := s.cfg.ChainStartFetcher.PreGenesisState()
-	initializedState, err := s.initializeBeaconChain(ctx, genesisTime, preGenesisState, s.cfg.ChainStartFetcher.ChainStartEth1Data())
-	if err != nil {
-		log.WithError(err).Fatal("Could not initialize beacon chain")
-	}
-	// We start a counter to genesis, if needed.
-	gRoot, err := initializedState.HashTreeRoot(s.ctx)
-	if err != nil {
-		log.WithError(err).Fatal("Could not hash tree root genesis state")
-	}
-	go slots.CountdownToGenesis(ctx, genesisTime, uint64(initializedState.NumValidators()), gRoot)
-
-	vr := bytesutil.ToBytes32(initializedState.GenesisValidatorsRoot())
-	if err := s.clockSetter.SetClock(startup.NewClock(genesisTime, vr)); err != nil {
-		log.WithError(err).Fatal("Failed to initialize blockchain service from execution start event")
-	}
-}
-
 // initializes the state and genesis block of the beacon chain to persistent storage
 // based on a genesis timestamp value obtained from the ChainStart event emitted
 // by the ETH1.0 Deposit Contract and the POWChain service of the node.

beacon-chain/blockchain/service_test.go

@@ -31,6 +31,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/container/trie"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -51,6 +52,7 @@ func setupBeaconChain(t *testing.T, beaconDB db.Database) *Service {
 		srv.Stop()
 	})
 	bState, _ := util.DeterministicGenesisState(t, 10)
+	genesis.StoreStateDuringTest(t, bState)
 	pbState, err := state_native.ProtobufBeaconStatePhase0(bState.ToProtoUnsafe())
 	require.NoError(t, err)
 	mockTrie, err := trie.NewTrie(0)
@@ -71,20 +73,22 @@ func setupBeaconChain(t *testing.T, beaconDB db.Database) *Service {
 		DepositContainers: []*ethpb.DepositContainer{},
 	})
 	require.NoError(t, err)
+
+	depositCache, err := depositsnapshot.New()
+	require.NoError(t, err)
+
 	web3Service, err = execution.NewService(
 		ctx,
 		execution.WithDatabase(beaconDB),
 		execution.WithHttpEndpoint(endpoint),
 		execution.WithDepositContractAddress(common.Address{}),
+		execution.WithDepositCache(depositCache),
 	)
 	require.NoError(t, err, "Unable to set up web3 service")
 
 	attService, err := attestations.NewService(ctx, &attestations.Config{Pool: attestations.NewPool()})
 	require.NoError(t, err)
 
-	depositCache, err := depositsnapshot.New()
-	require.NoError(t, err)
-
 	fc := doublylinkedtree.New()
 	stateGen := stategen.New(beaconDB, fc)
 	// Safe a state in stategen to purposes of testing a service stop / shutdown.
@@ -396,24 +400,6 @@ func TestServiceStop_SaveCachedBlocks(t *testing.T) {
 	require.Equal(t, true, s.cfg.BeaconDB.HasBlock(s.ctx, r))
 }
 
-func TestProcessChainStartTime_ReceivedFeed(t *testing.T) {
-	ctx := t.Context()
-	beaconDB := testDB.SetupDB(t)
-	service := setupBeaconChain(t, beaconDB)
-	mgs := &MockClockSetter{}
-	service.clockSetter = mgs
-	gt := time.Now()
-	service.onExecutionChainStart(t.Context(), gt)
-	gs, err := beaconDB.GenesisState(ctx)
-	require.NoError(t, err)
-	require.NotEqual(t, nil, gs)
-	require.Equal(t, 32, len(gs.GenesisValidatorsRoot()))
-	var zero [32]byte
-	require.DeepNotEqual(t, gs.GenesisValidatorsRoot(), zero[:])
-	require.Equal(t, gt, mgs.G.GenesisTime())
-	require.Equal(t, bytesutil.ToBytes32(gs.GenesisValidatorsRoot()), mgs.G.GenesisValidatorsRoot())
-}
-
 func BenchmarkHasBlockDB(b *testing.B) {
 	ctx := b.Context()
 	s := testServiceWithDB(b)

beacon-chain/blockchain/setup_test.go

@@ -89,7 +89,7 @@ func (mb *mockBroadcaster) BroadcastLightClientFinalityUpdate(_ context.Context,
 	return nil
 }
 
-func (mb *mockBroadcaster) BroadcastDataColumn(_ [fieldparams.RootLength]byte, _ uint64, _ *ethpb.DataColumnSidecar) error {
+func (mb *mockBroadcaster) BroadcastDataColumnSidecar(_ [fieldparams.RootLength]byte, _ uint64, _ *ethpb.DataColumnSidecar) error {
 	mb.broadcastCalled = true
 	return nil
 }

beacon-chain/blockchain/testing/mock.go

@@ -275,7 +275,7 @@ func (s *ChainService) ReceiveBlockInitialSync(ctx context.Context, block interf
 }
 
 // ReceiveBlockBatch processes blocks in batches from initial-sync.
-func (s *ChainService) ReceiveBlockBatch(ctx context.Context, blks []blocks.ROBlock, _ das.AvailabilityStore) error {
+func (s *ChainService) ReceiveBlockBatch(ctx context.Context, blks []blocks.ROBlock, _ das.AvailabilityChecker) error {
 	if s.State == nil {
 		return ErrNilState
 	}
@@ -305,7 +305,7 @@ func (s *ChainService) ReceiveBlockBatch(ctx context.Context, blks []blocks.ROBl
 }
 
 // ReceiveBlock mocks ReceiveBlock method in chain service.
-func (s *ChainService) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, _ [32]byte, _ das.AvailabilityStore) error {
+func (s *ChainService) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock, _ [32]byte, _ das.AvailabilityChecker) error {
 	if s.ReceiveBlockMockErr != nil {
 		return s.ReceiveBlockMockErr
 	}

beacon-chain/builder/service.go

@@ -25,6 +25,7 @@ var ErrNoBuilder = errors.New("builder endpoint not configured")
 // BlockBuilder defines the interface for interacting with the block builder
 type BlockBuilder interface {
 	SubmitBlindedBlock(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock) (interfaces.ExecutionData, v1.BlobsBundler, error)
+	SubmitBlindedBlockPostFulu(ctx context.Context, block interfaces.ReadOnlySignedBeaconBlock) error
 	GetHeader(ctx context.Context, slot primitives.Slot, parentHash [32]byte, pubKey [48]byte) (builder.SignedBid, error)
 	RegisterValidator(ctx context.Context, reg []*ethpb.SignedValidatorRegistrationV1) error
 	RegistrationByValidatorID(ctx context.Context, id primitives.ValidatorIndex) (*ethpb.ValidatorRegistrationV1, error)
@@ -101,6 +102,22 @@ func (s *Service) SubmitBlindedBlock(ctx context.Context, b interfaces.ReadOnlyS
 	return s.c.SubmitBlindedBlock(ctx, b)
 }
 
+// SubmitBlindedBlockPostFulu submits a blinded block to the builder relay network post-Fulu.
+// After Fulu, relays only return status codes (no payload).
+func (s *Service) SubmitBlindedBlockPostFulu(ctx context.Context, b interfaces.ReadOnlySignedBeaconBlock) error {
+	ctx, span := trace.StartSpan(ctx, "builder.SubmitBlindedBlockPostFulu")
+	defer span.End()
+	start := time.Now()
+	defer func() {
+		submitBlindedBlockLatency.Observe(float64(time.Since(start).Milliseconds()))
+	}()
+	if s.c == nil {
+		return ErrNoBuilder
+	}
+
+	return s.c.SubmitBlindedBlockPostFulu(ctx, b)
+}
+
 // GetHeader retrieves the header for a given slot and parent hash from the builder relay network.
 func (s *Service) GetHeader(ctx context.Context, slot primitives.Slot, parentHash [32]byte, pubKey [48]byte) (builder.SignedBid, error) {
 	ctx, span := trace.StartSpan(ctx, "builder.GetHeader")

beacon-chain/builder/testing/mock.go

@@ -24,21 +24,22 @@ type Config struct {
 
 // MockBuilderService to mock builder.
 type MockBuilderService struct {
-	HasConfigured         bool
-	Payload               *v1.ExecutionPayload
-	PayloadCapella        *v1.ExecutionPayloadCapella
-	PayloadDeneb          *v1.ExecutionPayloadDeneb
-	BlobBundle            *v1.BlobsBundle
-	BlobBundleV2          *v1.BlobsBundleV2
-	ErrSubmitBlindedBlock error
-	Bid                   *ethpb.SignedBuilderBid
-	BidCapella            *ethpb.SignedBuilderBidCapella
-	BidDeneb              *ethpb.SignedBuilderBidDeneb
-	BidElectra            *ethpb.SignedBuilderBidElectra
-	RegistrationCache     *cache.RegistrationCache
-	ErrGetHeader          error
-	ErrRegisterValidator  error
-	Cfg                   *Config
+	HasConfigured                 bool
+	Payload                       *v1.ExecutionPayload
+	PayloadCapella                *v1.ExecutionPayloadCapella
+	PayloadDeneb                  *v1.ExecutionPayloadDeneb
+	BlobBundle                    *v1.BlobsBundle
+	BlobBundleV2                  *v1.BlobsBundleV2
+	ErrSubmitBlindedBlock         error
+	ErrSubmitBlindedBlockPostFulu error
+	Bid                           *ethpb.SignedBuilderBid
+	BidCapella                    *ethpb.SignedBuilderBidCapella
+	BidDeneb                      *ethpb.SignedBuilderBidDeneb
+	BidElectra                    *ethpb.SignedBuilderBidElectra
+	RegistrationCache             *cache.RegistrationCache
+	ErrGetHeader                  error
+	ErrRegisterValidator          error
+	Cfg                           *Config
 }
 
 // Configured for mocking.
@@ -115,3 +116,8 @@ func (s *MockBuilderService) RegistrationByValidatorID(ctx context.Context, id p
 func (s *MockBuilderService) RegisterValidator(context.Context, []*ethpb.SignedValidatorRegistrationV1) error {
 	return s.ErrRegisterValidator
 }
+
+// SubmitBlindedBlockPostFulu for mocking.
+func (s *MockBuilderService) SubmitBlindedBlockPostFulu(_ context.Context, _ interfaces.ReadOnlySignedBeaconBlock) error {
+	return s.ErrSubmitBlindedBlockPostFulu
+}

beacon-chain/core/blocks/BUILD.bazel

@@ -41,7 +41,6 @@ go_library(
         "//encoding/ssz:go_default_library",
         "//math:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/attestation:go_default_library",

beacon-chain/core/blocks/signature.go

@@ -11,7 +11,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/crypto/bls"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/attestation"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
@@ -101,7 +100,7 @@ func VerifyBlockHeaderSignature(beaconState state.BeaconState, header *ethpb.Sig
 // via the respective epoch.
 func VerifyBlockSignatureUsingCurrentFork(beaconState state.ReadOnlyBeaconState, blk interfaces.ReadOnlySignedBeaconBlock, blkRoot [32]byte) error {
 	currentEpoch := slots.ToEpoch(blk.Block().Slot())
-	fork, err := forks.Fork(currentEpoch)
+	fork, err := params.Fork(currentEpoch)
 	if err != nil {
 		return err
 	}

beacon-chain/core/helpers/sync_committee_test.go

@@ -78,6 +78,7 @@ func TestIsCurrentEpochSyncCommittee_UsingCommittee(t *testing.T) {
 
 func TestIsCurrentEpochSyncCommittee_DoesNotExist(t *testing.T) {
 	helpers.ClearCache()
+	params.SetupTestConfigCleanup(t)
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -264,6 +265,7 @@ func TestCurrentEpochSyncSubcommitteeIndices_UsingCommittee(t *testing.T) {
 }
 
 func TestCurrentEpochSyncSubcommitteeIndices_DoesNotExist(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
 	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)

beacon-chain/core/peerdas/das_core.go

@@ -223,6 +223,14 @@ func dataColumnsSidecars(
 			cellsForRow := cellsAndProofs[rowIndex].Cells
 			proofsForRow := cellsAndProofs[rowIndex].Proofs
 
+			// Validate that we have enough cells and proofs for this column index
+			if columnIndex >= uint64(len(cellsForRow)) {
+				return nil, errors.Errorf("column index %d exceeds cells length %d for blob %d", columnIndex, len(cellsForRow), rowIndex)
+			}
+			if columnIndex >= uint64(len(proofsForRow)) {
+				return nil, errors.Errorf("column index %d exceeds proofs length %d for blob %d", columnIndex, len(proofsForRow), rowIndex)
+			}
+
 			cell := cellsForRow[columnIndex]
 			column = append(column, cell)
 

beacon-chain/core/peerdas/das_core_test.go

@@ -67,6 +67,55 @@ func TestDataColumnSidecars(t *testing.T) {
 		_, err = peerdas.DataColumnSidecars(signedBeaconBlock, cellsAndProofs)
 		require.ErrorIs(t, err, peerdas.ErrSizeMismatch)
 	})
+
+	t.Run("cells array too short for column index", func(t *testing.T) {
+		// Create a Fulu block with a blob commitment.
+		signedBeaconBlockPb := util.NewBeaconBlockFulu()
+		signedBeaconBlockPb.Block.Body.BlobKzgCommitments = [][]byte{make([]byte, 48)}
+
+		// Create a signed beacon block from the protobuf.
+		signedBeaconBlock, err := blocks.NewSignedBeaconBlock(signedBeaconBlockPb)
+		require.NoError(t, err)
+
+		// Create cells and proofs with insufficient cells for the number of columns.
+		// This simulates a scenario where cellsAndProofs has fewer cells than expected columns.
+		cellsAndProofs := []kzg.CellsAndProofs{
+			{
+				Cells:  make([]kzg.Cell, 10),  // Only 10 cells
+				Proofs: make([]kzg.Proof, 10), // Only 10 proofs
+			},
+		}
+
+		// This should fail because the function will try to access columns up to NumberOfColumns
+		// but we only have 10 cells/proofs.
+		_, err = peerdas.DataColumnSidecars(signedBeaconBlock, cellsAndProofs)
+		require.ErrorContains(t, "column index", err)
+		require.ErrorContains(t, "exceeds cells length", err)
+	})
+
+	t.Run("proofs array too short for column index", func(t *testing.T) {
+		// Create a Fulu block with a blob commitment.
+		signedBeaconBlockPb := util.NewBeaconBlockFulu()
+		signedBeaconBlockPb.Block.Body.BlobKzgCommitments = [][]byte{make([]byte, 48)}
+
+		// Create a signed beacon block from the protobuf.
+		signedBeaconBlock, err := blocks.NewSignedBeaconBlock(signedBeaconBlockPb)
+		require.NoError(t, err)
+
+		// Create cells and proofs with sufficient cells but insufficient proofs.
+		numberOfColumns := params.BeaconConfig().NumberOfColumns
+		cellsAndProofs := []kzg.CellsAndProofs{
+			{
+				Cells:  make([]kzg.Cell, numberOfColumns),
+				Proofs: make([]kzg.Proof, 5), // Only 5 proofs, less than columns
+			},
+		}
+
+		// This should fail when trying to access proof beyond index 4.
+		_, err = peerdas.DataColumnSidecars(signedBeaconBlock, cellsAndProofs)
+		require.ErrorContains(t, "column index", err)
+		require.ErrorContains(t, "exceeds proofs length", err)
+	})
 }
 
 func TestComputeCustodyGroupForColumn(t *testing.T) {

beacon-chain/core/peerdas/info.go

@@ -107,3 +107,29 @@ func computeInfoCacheKey(nodeID enode.ID, custodyGroupCount uint64) [nodeInfoCac
 
 	return key
 }
+
+// ColumnIndices is a map of column indices where the key is the column index and the value is a boolean.
+// The boolean could indicate different things, eg whether the column is needed (in the context of satisfying custody requirements)
+// or present (in the context of a custody check on disk or in cache).
+type ColumnIndices map[uint64]bool
+
+// CopyTrueIndices allows callers to get a copy of the given ColumnIndices, filtering out any keys
+// where the value == `false`.
+func CopyTrueIndices(src ColumnIndices) ColumnIndices {
+	dst := make(ColumnIndices, len(src))
+	for k, v := range src {
+		if v {
+			dst[k] = true
+		}
+	}
+	return dst
+}
+
+// ColumnIndicesFromSlice converts a slice of uint64 indices into the ColumnIndices equivalent.
+func ColumnIndicesFromSlice(indices []uint64) ColumnIndices {
+	ci := make(ColumnIndices, len(indices))
+	for _, index := range indices {
+		ci[index] = true
+	}
+	return ci
+}

beacon-chain/core/peerdas/reconstruction.go

@@ -18,8 +18,8 @@ var (
 	ErrBlobsCellsProofsMismatch = errors.New("blobs and cells proofs mismatch")
 )
 
-// MinimumColumnsCountToReconstruct return the minimum number of columns needed to proceed to a reconstruction.
-func MinimumColumnsCountToReconstruct() uint64 {
+// MinimumColumnCountToReconstruct return the minimum number of columns needed to proceed to a reconstruction.
+func MinimumColumnCountToReconstruct() uint64 {
 	// If the number of columns is odd, then we need total / 2 + 1 columns to reconstruct.
 	// If the number of columns is even, then we need total / 2 columns to reconstruct.
 	return (params.BeaconConfig().NumberOfColumns + 1) / 2
@@ -58,7 +58,7 @@ func ReconstructDataColumnSidecars(inVerifiedRoSidecars []blocks.VerifiedRODataC
 
 	// Check if there is enough sidecars to reconstruct the missing columns.
 	sidecarCount := len(sidecarByIndex)
-	if uint64(sidecarCount) < MinimumColumnsCountToReconstruct() {
+	if uint64(sidecarCount) < MinimumColumnCountToReconstruct() {
 		return nil, ErrNotEnoughDataColumnSidecars
 	}
 

beacon-chain/core/peerdas/reconstruction_test.go

@@ -48,7 +48,7 @@ func TestMinimumColumnsCountToReconstruct(t *testing.T) {
 			params.OverrideBeaconConfig(cfg)
 
 			// Compute the minimum number of columns needed to reconstruct.
-			actual := peerdas.MinimumColumnsCountToReconstruct()
+			actual := peerdas.MinimumColumnCountToReconstruct()
 			require.Equal(t, tc.expected, actual)
 		})
 	}
@@ -100,7 +100,7 @@ func TestReconstructDataColumnSidecars(t *testing.T) {
 	t.Run("not enough columns to enable reconstruction", func(t *testing.T) {
 		_, _, verifiedRoSidecars := util.GenerateTestFuluBlockWithSidecars(t, 3)
 
-		minimum := peerdas.MinimumColumnsCountToReconstruct()
+		minimum := peerdas.MinimumColumnCountToReconstruct()
 		_, err := peerdas.ReconstructDataColumnSidecars(verifiedRoSidecars[:minimum-1])
 		require.ErrorIs(t, err, peerdas.ErrNotEnoughDataColumnSidecars)
 	})

beacon-chain/core/signing/BUILD.bazel

@@ -4,7 +4,6 @@ go_library(
     name = "go_default_library",
     srcs = [
         "domain.go",
-        "signature.go",
         "signing_root.go",
     ],
     importpath = "github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing",
@@ -25,7 +24,6 @@ go_test(
     name = "go_default_test",
     srcs = [
         "domain_test.go",
-        "signature_test.go",
         "signing_root_test.go",
     ],
     embed = [":go_default_library"],

beacon-chain/core/signing/signature.go

@@ -1,34 +0,0 @@
-package signing
-
-import (
-	"github.com/OffchainLabs/prysm/v6/config/params"
-	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/pkg/errors"
-)
-
-var ErrNilRegistration = errors.New("nil signed registration")
-
-// VerifyRegistrationSignature verifies the signature of a validator's registration.
-func VerifyRegistrationSignature(
-	sr *ethpb.SignedValidatorRegistrationV1,
-) error {
-	if sr == nil || sr.Message == nil {
-		return ErrNilRegistration
-	}
-
-	d := params.BeaconConfig().DomainApplicationBuilder
-	// Per spec, we want the fork version and genesis validator to be nil.
-	// Which is genesis value and zero by default.
-	sd, err := ComputeDomain(
-		d,
-		nil, /* fork version */
-		nil /* genesis val root */)
-	if err != nil {
-		return err
-	}
-
-	if err := VerifySigningRoot(sr.Message, sr.Message.Pubkey, sr.Signature, sd); err != nil {
-		return ErrSigFailedToVerify
-	}
-	return nil
-}

beacon-chain/core/signing/signature_test.go

@@ -1,42 +0,0 @@
-package signing_test
-
-import (
-	"testing"
-	"time"
-
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
-	"github.com/OffchainLabs/prysm/v6/config/params"
-	"github.com/OffchainLabs/prysm/v6/crypto/bls"
-	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v6/testing/require"
-)
-
-func TestVerifyRegistrationSignature(t *testing.T) {
-	sk, err := bls.RandKey()
-	require.NoError(t, err)
-	reg := &ethpb.ValidatorRegistrationV1{
-		FeeRecipient: bytesutil.PadTo([]byte("fee"), 20),
-		GasLimit:     123456,
-		Timestamp:    uint64(time.Now().Unix()),
-		Pubkey:       sk.PublicKey().Marshal(),
-	}
-	d := params.BeaconConfig().DomainApplicationBuilder
-	domain, err := signing.ComputeDomain(d, nil, nil)
-	require.NoError(t, err)
-	sr, err := signing.ComputeSigningRoot(reg, domain)
-	require.NoError(t, err)
-	sk.Sign(sr[:]).Marshal()
-
-	sReg := &ethpb.SignedValidatorRegistrationV1{
-		Message:   reg,
-		Signature: sk.Sign(sr[:]).Marshal(),
-	}
-	require.NoError(t, signing.VerifyRegistrationSignature(sReg))
-
-	sReg.Signature = []byte("bad")
-	require.ErrorIs(t, signing.VerifyRegistrationSignature(sReg), signing.ErrSigFailedToVerify)
-
-	sReg.Message = nil
-	require.ErrorIs(t, signing.VerifyRegistrationSignature(sReg), signing.ErrNilRegistration)
-}

beacon-chain/das/availability_blobs.go

@@ -29,7 +29,7 @@ type LazilyPersistentStoreBlob struct {
 	verifier BlobBatchVerifier
 }
 
-var _ AvailabilityStore = &LazilyPersistentStoreBlob{}
+var _ AvailabilityChecker = &LazilyPersistentStoreBlob{}
 
 // BlobBatchVerifier enables LazyAvailabilityStore to manage the verification process
 // going from ROBlob->VerifiedROBlob, while avoiding the decision of which individual verifications
@@ -53,30 +53,25 @@ func NewLazilyPersistentStore(store *filesystem.BlobStorage, verifier BlobBatchV
 // Persist adds blobs to the working blob cache. Blobs stored in this cache will be persisted
 // for at least as long as the node is running. Once IsDataAvailable succeeds, all blobs referenced
 // by the given block are guaranteed to be persisted for the remainder of the retention period.
-func (s *LazilyPersistentStoreBlob) Persist(current primitives.Slot, sidecars ...blocks.ROSidecar) error {
+func (s *LazilyPersistentStoreBlob) Persist(current primitives.Slot, sidecars ...blocks.ROBlob) error {
 	if len(sidecars) == 0 {
 		return nil
 	}
 
-	blobSidecars, err := blocks.BlobSidecarsFromSidecars(sidecars)
-	if err != nil {
-		return errors.Wrap(err, "blob sidecars from sidecars")
-	}
-
-	if len(blobSidecars) > 1 {
-		firstRoot := blobSidecars[0].BlockRoot()
-		for _, sidecar := range blobSidecars[1:] {
+	if len(sidecars) > 1 {
+		firstRoot := sidecars[0].BlockRoot()
+		for _, sidecar := range sidecars[1:] {
 			if sidecar.BlockRoot() != firstRoot {
 				return errMixedRoots
 			}
 		}
 	}
-	if !params.WithinDAPeriod(slots.ToEpoch(blobSidecars[0].Slot()), slots.ToEpoch(current)) {
+	if !params.WithinDAPeriod(slots.ToEpoch(sidecars[0].Slot()), slots.ToEpoch(current)) {
 		return nil
 	}
-	key := keyFromSidecar(blobSidecars[0])
+	key := keyFromSidecar(sidecars[0])
 	entry := s.cache.ensure(key)
-	for _, blobSidecar := range blobSidecars {
+	for _, blobSidecar := range sidecars {
 		if err := entry.stash(&blobSidecar); err != nil {
 			return err
 		}

beacon-chain/das/availability_blobs_test.go

@@ -118,23 +118,21 @@ func TestLazilyPersistent_Missing(t *testing.T) {
 
 	blk, blobSidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, 1, 3)
 
-	scs := blocks.NewSidecarsFromBlobSidecars(blobSidecars)
-
 	mbv := &mockBlobBatchVerifier{t: t, scs: blobSidecars}
 	as := NewLazilyPersistentStore(store, mbv)
 
 	// Only one commitment persisted, should return error with other indices
-	require.NoError(t, as.Persist(1, scs[2]))
+	require.NoError(t, as.Persist(1, blobSidecars[2]))
 	err := as.IsDataAvailable(ctx, 1, blk)
 	require.ErrorIs(t, err, errMissingSidecar)
 
 	// All but one persisted, return missing idx
-	require.NoError(t, as.Persist(1, scs[0]))
+	require.NoError(t, as.Persist(1, blobSidecars[0]))
 	err = as.IsDataAvailable(ctx, 1, blk)
 	require.ErrorIs(t, err, errMissingSidecar)
 
 	// All persisted, return nil
-	require.NoError(t, as.Persist(1, scs...))
+	require.NoError(t, as.Persist(1, blobSidecars...))
 
 	require.NoError(t, as.IsDataAvailable(ctx, 1, blk))
 }
@@ -149,10 +147,8 @@ func TestLazilyPersistent_Mismatch(t *testing.T) {
 	blobSidecars[0].KzgCommitment = bytesutil.PadTo([]byte("nope"), 48)
 	as := NewLazilyPersistentStore(store, mbv)
 
-	scs := blocks.NewSidecarsFromBlobSidecars(blobSidecars)
-
 	// Only one commitment persisted, should return error with other indices
-	require.NoError(t, as.Persist(1, scs[0]))
+	require.NoError(t, as.Persist(1, blobSidecars[0]))
 	err := as.IsDataAvailable(ctx, 1, blk)
 	require.NotNil(t, err)
 	require.ErrorIs(t, err, errCommitmentMismatch)
@@ -161,29 +157,25 @@ func TestLazilyPersistent_Mismatch(t *testing.T) {
 func TestLazyPersistOnceCommitted(t *testing.T) {
 	_, blobSidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, 1, 6)
 
-	scs := blocks.NewSidecarsFromBlobSidecars(blobSidecars)
-
 	as := NewLazilyPersistentStore(filesystem.NewEphemeralBlobStorage(t), &mockBlobBatchVerifier{})
 	// stashes as expected
-	require.NoError(t, as.Persist(1, scs...))
+	require.NoError(t, as.Persist(1, blobSidecars...))
 	// ignores duplicates
-	require.ErrorIs(t, as.Persist(1, scs...), ErrDuplicateSidecar)
+	require.ErrorIs(t, as.Persist(1, blobSidecars...), ErrDuplicateSidecar)
 
 	// ignores index out of bound
 	blobSidecars[0].Index = 6
-	require.ErrorIs(t, as.Persist(1, blocks.NewSidecarFromBlobSidecar(blobSidecars[0])), errIndexOutOfBounds)
+	require.ErrorIs(t, as.Persist(1, blobSidecars[0]), errIndexOutOfBounds)
 
 	_, moreBlobSidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, 1, 4)
 
-	more := blocks.NewSidecarsFromBlobSidecars(moreBlobSidecars)
-
 	// ignores sidecars before the retention period
 	slotOOB, err := slots.EpochStart(params.BeaconConfig().MinEpochsForBlobsSidecarsRequest)
 	require.NoError(t, err)
-	require.NoError(t, as.Persist(32+slotOOB, more[0]))
+	require.NoError(t, as.Persist(32+slotOOB, moreBlobSidecars[0]))
 
 	// doesn't ignore new sidecars with a different block root
-	require.NoError(t, as.Persist(1, more...))
+	require.NoError(t, as.Persist(1, moreBlobSidecars...))
 }
 
 type mockBlobBatchVerifier struct {

beacon-chain/das/availability_columns.go

@@ -26,7 +26,7 @@ type LazilyPersistentStoreColumn struct {
 	custodyGroupCount      uint64
 }
 
-var _ AvailabilityStore = &LazilyPersistentStoreColumn{}
+var _ AvailabilityChecker = &LazilyPersistentStoreColumn{}
 
 // DataColumnsVerifier enables LazilyPersistentStoreColumn to manage the verification process
 // going from RODataColumn->VerifiedRODataColumn, while avoiding the decision of which individual verifications
@@ -56,22 +56,17 @@ func NewLazilyPersistentStoreColumn(
 // PersistColumns adds columns to the working column cache. Columns stored in this cache will be persisted
 // for at least as long as the node is running. Once IsDataAvailable succeeds, all columns referenced
 // by the given block are guaranteed to be persisted for the remainder of the retention period.
-func (s *LazilyPersistentStoreColumn) Persist(current primitives.Slot, sidecars ...blocks.ROSidecar) error {
+func (s *LazilyPersistentStoreColumn) Persist(current primitives.Slot, sidecars ...blocks.RODataColumn) error {
 	if len(sidecars) == 0 {
 		return nil
 	}
 
-	dataColumnSidecars, err := blocks.DataColumnSidecarsFromSidecars(sidecars)
-	if err != nil {
-		return errors.Wrap(err, "blob sidecars from sidecars")
-	}
-
 	// It is safe to retrieve the first sidecar.
-	firstSidecar := dataColumnSidecars[0]
+	firstSidecar := sidecars[0]
 
 	if len(sidecars) > 1 {
 		firstRoot := firstSidecar.BlockRoot()
-		for _, sidecar := range dataColumnSidecars[1:] {
+		for _, sidecar := range sidecars[1:] {
 			if sidecar.BlockRoot() != firstRoot {
 				return errMixedRoots
 			}
@@ -86,7 +81,7 @@ func (s *LazilyPersistentStoreColumn) Persist(current primitives.Slot, sidecars
 	key := cacheKey{slot: firstSidecar.Slot(), root: firstSidecar.BlockRoot()}
 	entry := s.cache.ensure(key)
 
-	for _, sidecar := range dataColumnSidecars {
+	for _, sidecar := range sidecars {
 		if err := entry.stash(&sidecar); err != nil {
 			return errors.Wrap(err, "stash DataColumnSidecar")
 		}

beacon-chain/das/availability_columns_test.go

@@ -41,7 +41,7 @@ func TestPersist(t *testing.T) {
 			{Slot: 2, Index: 2},
 		}
 
-		roSidecars, _ := roSidecarsFromDataColumnParamsByBlockRoot(t, dataColumnParamsByBlockRoot)
+		roSidecars, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
 		lazilyPersistentStoreColumns := NewLazilyPersistentStoreColumn(dataColumnStorage, enode.ID{}, nil, 0)
 
 		err := lazilyPersistentStoreColumns.Persist(0, roSidecars...)
@@ -56,7 +56,7 @@ func TestPersist(t *testing.T) {
 			{Slot: 1, Index: 1},
 		}
 
-		roSidecars, _ := roSidecarsFromDataColumnParamsByBlockRoot(t, dataColumnParamsByBlockRoot)
+		roSidecars, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
 		lazilyPersistentStoreColumns := NewLazilyPersistentStoreColumn(dataColumnStorage, enode.ID{}, nil, 0)
 
 		err := lazilyPersistentStoreColumns.Persist(1_000_000, roSidecars...)
@@ -73,7 +73,7 @@ func TestPersist(t *testing.T) {
 			{Slot: slot, Index: 5},
 		}
 
-		roSidecars, roDataColumns := roSidecarsFromDataColumnParamsByBlockRoot(t, dataColumnParamsByBlockRoot)
+		roSidecars, roDataColumns := util.CreateTestVerifiedRoDataColumnSidecars(t, dataColumnParamsByBlockRoot)
 		lazilyPersistentStoreColumns := NewLazilyPersistentStoreColumn(dataColumnStorage, enode.ID{}, nil, 0)
 
 		err := lazilyPersistentStoreColumns.Persist(slot, roSidecars...)
@@ -234,17 +234,6 @@ func TestFullCommitmentsToCheck(t *testing.T) {
 	}
 }
 
-func roSidecarsFromDataColumnParamsByBlockRoot(t *testing.T, parameters []util.DataColumnParam) ([]blocks.ROSidecar, []blocks.RODataColumn) {
-	roDataColumns, _ := util.CreateTestVerifiedRoDataColumnSidecars(t, parameters)
-
-	roSidecars := make([]blocks.ROSidecar, 0, len(roDataColumns))
-	for _, roDataColumn := range roDataColumns {
-		roSidecars = append(roSidecars, blocks.NewSidecarFromDataColumnSidecar(roDataColumn))
-	}
-
-	return roSidecars, roDataColumns
-}
-
 func newSignedRoBlock(t *testing.T, signedBeaconBlock interface{}) blocks.ROBlock {
 	sb, err := blocks.NewSignedBeaconBlock(signedBeaconBlock)
 	require.NoError(t, err)

beacon-chain/das/blob_cache.go

@@ -99,20 +99,26 @@ func (e *blobCacheEntry) filter(root [32]byte, kc [][]byte, slot primitives.Slot
 		if e.diskSummary.HasIndex(i) {
 			continue
 		}
+		// Check if e.scs has this index before accessing
+		var sidecar *blocks.ROBlob
+		if i < uint64(len(e.scs)) {
+			sidecar = e.scs[i]
+		}
+
 		if kc[i] == nil {
-			if e.scs[i] != nil {
-				return nil, errors.Wrapf(errCommitmentMismatch, "root=%#x, index=%#x, commitment=%#x, no block commitment", root, i, e.scs[i].KzgCommitment)
+			if sidecar != nil {
+				return nil, errors.Wrapf(errCommitmentMismatch, "root=%#x, index=%#x, commitment=%#x, no block commitment", root, i, sidecar.KzgCommitment)
 			}
 			continue
 		}
 
-		if e.scs[i] == nil {
+		if sidecar == nil {
 			return nil, errors.Wrapf(errMissingSidecar, "root=%#x, index=%#x", root, i)
 		}
-		if !bytes.Equal(kc[i], e.scs[i].KzgCommitment) {
-			return nil, errors.Wrapf(errCommitmentMismatch, "root=%#x, index=%#x, commitment=%#x, block commitment=%#x", root, i, e.scs[i].KzgCommitment, kc[i])
+		if !bytes.Equal(kc[i], sidecar.KzgCommitment) {
+			return nil, errors.Wrapf(errCommitmentMismatch, "root=%#x, index=%#x, commitment=%#x, block commitment=%#x", root, i, sidecar.KzgCommitment, kc[i])
 		}
-		scs = append(scs, *e.scs[i])
+		scs = append(scs, *sidecar)
 	}
 
 	return scs, nil

beacon-chain/das/blob_cache_test.go

@@ -155,6 +155,41 @@ func TestFilter(t *testing.T) {
 			},
 			err: errCommitmentMismatch,
 		},
+		{
+			name: "empty scs array with commitments",
+			setup: func(t *testing.T) (*blobCacheEntry, [][]byte, []blocks.ROBlob) {
+				// This reproduces the panic condition where entry.scs is empty or nil
+				// but we have commitments to check
+				entry := &blobCacheEntry{
+					scs: nil, // Empty/nil array that caused the panic
+				}
+				// Create a commitment that would trigger the check at index 0
+				commits := [][]byte{
+					bytesutil.PadTo([]byte("commitment1"), 48),
+				}
+				return entry, commits, nil
+			},
+			err: errMissingSidecar,
+		},
+		{
+			name: "scs array shorter than commitments",
+			setup: func(t *testing.T) (*blobCacheEntry, [][]byte, []blocks.ROBlob) {
+				// This reproduces the condition where entry.scs exists but is shorter
+				// than the number of commitments we're checking
+				entry := &blobCacheEntry{
+					scs: make([]*blocks.ROBlob, 2), // Only 2 slots
+				}
+				// Create 4 commitments, accessing index 2 and 3 would have panicked
+				commits := [][]byte{
+					nil,
+					nil,
+					bytesutil.PadTo([]byte("commitment3"), 48),
+					bytesutil.PadTo([]byte("commitment4"), 48),
+				}
+				return entry, commits, nil
+			},
+			err: errMissingSidecar,
+		},
 	}
 	for _, c := range cases {
 		t.Run(c.name, func(t *testing.T) {

beacon-chain/das/iface.go

@@ -15,5 +15,12 @@ import (
 // durably persisted before returning a non-error value.
 type AvailabilityStore interface {
 	IsDataAvailable(ctx context.Context, current primitives.Slot, b blocks.ROBlock) error
-	Persist(current primitives.Slot, sc ...blocks.ROSidecar) error
+	AvailabilityChecker
+	Persist(current primitives.Slot, blobSidecar ...blocks.ROBlob) error
+}
+
+// AvailabilityChecker is the minimum interface needed to check if data is available for a block.
+// We should prefer this interface over AvailabilityStore in places where we don't need to persist blob data.
+type AvailabilityChecker interface {
+	IsDataAvailable(ctx context.Context, current primitives.Slot, b blocks.ROBlock) error
 }

beacon-chain/das/mock.go

@@ -5,16 +5,15 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
-	errors "github.com/pkg/errors"
 )
 
 // MockAvailabilityStore is an implementation of AvailabilityStore that can be used by other packages in tests.
 type MockAvailabilityStore struct {
 	VerifyAvailabilityCallback func(ctx context.Context, current primitives.Slot, b blocks.ROBlock) error
-	PersistBlobsCallback       func(current primitives.Slot, sc ...blocks.ROBlob) error
+	PersistBlobsCallback       func(current primitives.Slot, blobSidecar ...blocks.ROBlob) error
 }
 
-var _ AvailabilityStore = &MockAvailabilityStore{}
+var _ AvailabilityChecker = &MockAvailabilityStore{}
 
 // IsDataAvailable satisfies the corresponding method of the AvailabilityStore interface in a way that is useful for tests.
 func (m *MockAvailabilityStore) IsDataAvailable(ctx context.Context, current primitives.Slot, b blocks.ROBlock) error {
@@ -25,13 +24,9 @@ func (m *MockAvailabilityStore) IsDataAvailable(ctx context.Context, current pri
 }
 
 // Persist satisfies the corresponding method of the AvailabilityStore interface in a way that is useful for tests.
-func (m *MockAvailabilityStore) Persist(current primitives.Slot, sc ...blocks.ROSidecar) error {
-	blobSidecars, err := blocks.BlobSidecarsFromSidecars(sc)
-	if err != nil {
-		return errors.Wrap(err, "blob sidecars from sidecars")
-	}
+func (m *MockAvailabilityStore) Persist(current primitives.Slot, blobSidecar ...blocks.ROBlob) error {
 	if m.PersistBlobsCallback != nil {
-		return m.PersistBlobsCallback(current, blobSidecars...)
+		return m.PersistBlobsCallback(current, blobSidecar...)
 	}
 	return nil
 }

beacon-chain/db/BUILD.bazel

@@ -13,6 +13,7 @@ go_library(
     visibility = [
         "//beacon-chain:__subpackages__",
         "//cmd/beacon-chain:__subpackages__",
+        "//genesis:__subpackages__",
         "//testing/slasher/simulator:__pkg__",
         "//tools:__subpackages__",
     ],

beacon-chain/db/filesystem/data_column.go

@@ -100,6 +100,14 @@ type (
 	}
 )
 
+// DataColumnStorageReader is an interface to read data column sidecars from the filesystem.
+type DataColumnStorageReader interface {
+	Summary(root [fieldparams.RootLength]byte) DataColumnStorageSummary
+	Get(root [fieldparams.RootLength]byte, indices []uint64) ([]blocks.VerifiedRODataColumn, error)
+}
+
+var _ DataColumnStorageReader = &DataColumnStorage{}
+
 // WithDataColumnBasePath is a required option that sets the base path of data column storage.
 func WithDataColumnBasePath(base string) DataColumnStorageOption {
 	return func(b *DataColumnStorage) error {

beacon-chain/db/filesystem/data_column_cache.go

@@ -84,12 +84,6 @@ func (s DataColumnStorageSummary) Stored() map[uint64]bool {
 	return stored
 }
 
-// DataColumnStorageSummarizer can be used to receive a summary of metadata about data columns on disk for a given root.
-// The DataColumnStorageSummary can be used to check which indices (if any) are available for a given block by root.
-type DataColumnStorageSummarizer interface {
-	Summary(root [fieldparams.RootLength]byte) DataColumnStorageSummary
-}
-
 type dataColumnStorageSummaryCache struct {
 	mu                 sync.RWMutex
 	dataColumnCount    float64
@@ -98,8 +92,6 @@ type dataColumnStorageSummaryCache struct {
 	cache              map[[fieldparams.RootLength]byte]DataColumnStorageSummary
 }
 
-var _ DataColumnStorageSummarizer = &dataColumnStorageSummaryCache{}
-
 func newDataColumnStorageSummaryCache() *dataColumnStorageSummaryCache {
 	return &dataColumnStorageSummaryCache{
 		cache:             make(map[[fieldparams.RootLength]byte]DataColumnStorageSummary),

beacon-chain/db/filesystem/mock.go

@@ -144,14 +144,3 @@ func NewEphemeralDataColumnStorageWithMocker(t testing.TB) (*DataColumnMocker, *
 	fs, dcs := NewEphemeralDataColumnStorageAndFs(t)
 	return &DataColumnMocker{fs: fs, dcs: dcs}, dcs
 }
-
-func NewMockDataColumnStorageSummarizer(t *testing.T, set map[[fieldparams.RootLength]byte][]uint64) DataColumnStorageSummarizer {
-	c := newDataColumnStorageSummaryCache()
-	for root, indices := range set {
-		if err := c.set(DataColumnsIdent{Root: root, Epoch: 0, Indices: indices}); err != nil {
-			t.Fatal(err)
-		}
-	}
-
-	return c
-}

beacon-chain/db/iface/interface.go

@@ -115,6 +115,17 @@ type NoHeadAccessDatabase interface {
 	CleanUpDirtyStates(ctx context.Context, slotsPerArchivedPoint primitives.Slot) error
 	DeleteHistoricalDataBeforeSlot(ctx context.Context, slot primitives.Slot, batchSize int) (int, error)
 
+	// Genesis operations.
+	LoadGenesis(ctx context.Context, stateBytes []byte) error
+	SaveGenesisData(ctx context.Context, state state.BeaconState) error
+	EnsureEmbeddedGenesis(ctx context.Context) error
+
+	// Support for checkpoint sync and backfill.
+	SaveOriginCheckpointBlockRoot(ctx context.Context, blockRoot [32]byte) error
+	SaveOrigin(ctx context.Context, serState, serBlock []byte) error
+	SaveBackfillStatus(context.Context, *dbval.BackfillStatus) error
+	BackfillFinalizedIndex(ctx context.Context, blocks []blocks.ROBlock, finalizedChildRoot [32]byte) error
+
 	// Custody operations.
 	UpdateSubscribedToAllDataSubnets(ctx context.Context, subscribed bool) (bool, error)
 	UpdateCustodyInfo(ctx context.Context, earliestAvailableSlot primitives.Slot, custodyGroupCount uint64) (primitives.Slot, uint64, error)
@@ -131,16 +142,6 @@ type HeadAccessDatabase interface {
 	HeadBlock(ctx context.Context) (interfaces.ReadOnlySignedBeaconBlock, error)
 	HeadBlockRoot() ([32]byte, error)
 	SaveHeadBlockRoot(ctx context.Context, blockRoot [32]byte) error
-
-	// Genesis operations.
-	LoadGenesis(ctx context.Context, stateBytes []byte) error
-	SaveGenesisData(ctx context.Context, state state.BeaconState) error
-	EnsureEmbeddedGenesis(ctx context.Context) error
-
-	// Support for checkpoint sync and backfill.
-	SaveOrigin(ctx context.Context, serState, serBlock []byte) error
-	SaveBackfillStatus(context.Context, *dbval.BackfillStatus) error
-	BackfillFinalizedIndex(ctx context.Context, blocks []blocks.ROBlock, finalizedChildRoot [32]byte) error
 }
 
 // SlasherDatabase interface for persisting data related to detecting slashable offenses on Ethereum.

beacon-chain/db/kv/BUILD.bazel

@@ -40,7 +40,6 @@ go_library(
         "//beacon-chain/db/filters:go_default_library",
         "//beacon-chain/db/iface:go_default_library",
         "//beacon-chain/state:go_default_library",
-        "//beacon-chain/state/genesis:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",
         "//config/features:go_default_library",
         "//config/fieldparams:go_default_library",
@@ -52,6 +51,7 @@ go_library(
         "//container/slice:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//encoding/ssz/detect:go_default_library",
+        "//genesis:go_default_library",
         "//io/file:go_default_library",
         "//monitoring/progress:go_default_library",
         "//monitoring/tracing:go_default_library",
@@ -110,7 +110,6 @@ go_test(
         "//beacon-chain/db/filters:go_default_library",
         "//beacon-chain/db/iface:go_default_library",
         "//beacon-chain/state:go_default_library",
-        "//beacon-chain/state/genesis:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",
         "//config/features:go_default_library",
         "//config/fieldparams:go_default_library",
@@ -120,6 +119,7 @@ go_test(
         "//consensus-types/light-client:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//genesis:go_default_library",
         "//proto/dbval:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",

beacon-chain/db/kv/genesis.go

@@ -8,6 +8,7 @@ import (
 	dbIface "github.com/OffchainLabs/prysm/v6/beacon-chain/db/iface"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
 	"github.com/OffchainLabs/prysm/v6/encoding/ssz/detect"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/pkg/errors"
 )
@@ -97,8 +98,22 @@ func (s *Store) EnsureEmbeddedGenesis(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
-	if gs != nil && !gs.IsNil() {
+	if !state.IsNil(gs) {
 		return s.SaveGenesisData(ctx, gs)
 	}
 	return nil
 }
+
+type LegacyGenesisProvider struct {
+	store *Store
+}
+
+func NewLegacyGenesisProvider(store *Store) *LegacyGenesisProvider {
+	return &LegacyGenesisProvider{store: store}
+}
+
+var _ genesis.Provider = &LegacyGenesisProvider{}
+
+func (p *LegacyGenesisProvider) Genesis(ctx context.Context) (state.BeaconState, error) {
+	return p.store.LegacyGenesisState(ctx)
+}

beacon-chain/db/kv/genesis_test.go

@@ -8,6 +8,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/iface"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
@@ -152,6 +153,7 @@ func TestEnsureEmbeddedGenesis(t *testing.T) {
 		require.NoError(t, undo())
 	}()
 
+	genesis.StoreEmbeddedDuringTest(t, params.BeaconConfig().ConfigName)
 	ctx := t.Context()
 	db := setupDB(t)
 

beacon-chain/db/kv/state.go

@@ -6,14 +6,12 @@ import (
 	"fmt"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/genesis"
 	statenative "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
 	"github.com/OffchainLabs/prysm/v6/config/features"
-	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/monitoring/tracing"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
@@ -65,21 +63,21 @@ func (s *Store) StateOrError(ctx context.Context, blockRoot [32]byte) (state.Bea
 	return st, nil
 }
 
-// GenesisState returns the genesis state in beacon chain.
 func (s *Store) GenesisState(ctx context.Context) (state.BeaconState, error) {
-	ctx, span := trace.StartSpan(ctx, "BeaconDB.GenesisState")
+	st, err := genesis.State()
+	if errors.Is(err, genesis.ErrGenesisStateNotInitialized) {
+		log.WithError(err).Error("genesis state not initialized, returning nil state. this should only happen in tests")
+		return nil, nil
+	}
+	return st, err
+}
+
+// GenesisState returns the genesis state in beacon chain.
+func (s *Store) LegacyGenesisState(ctx context.Context) (state.BeaconState, error) {
+	ctx, span := trace.StartSpan(ctx, "BeaconDB.LegacyGenesisState")
 	defer span.End()
 
-	cached, err := genesis.State(params.BeaconConfig().ConfigName)
-	if err != nil {
-		tracing.AnnotateError(span, err)
-		return nil, err
-	}
-	span.SetAttributes(trace.BoolAttribute("cache_hit", cached != nil))
-	if cached != nil {
-		return cached, nil
-	}
-
+	var err error
 	var st state.BeaconState
 	err = s.db.View(func(tx *bolt.Tx) error {
 		// Retrieve genesis block's signing root from blocks bucket,

beacon-chain/db/kv/state_test.go

@@ -15,6 +15,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -488,7 +489,7 @@ func TestGenesisState_CanSaveRetrieve(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, st.SetSlot(1))
 	require.NoError(t, db.SaveGenesisBlockRoot(t.Context(), headRoot))
-	require.NoError(t, db.SaveState(t.Context(), st, headRoot))
+	genesis.StoreStateDuringTest(t, st)
 
 	savedGenesisS, err := db.GenesisState(t.Context())
 	require.NoError(t, err)
@@ -661,7 +662,7 @@ func TestStore_GenesisState_CanGetHighestBelow(t *testing.T) {
 	require.NoError(t, err)
 	genesisRoot := [32]byte{'a'}
 	require.NoError(t, db.SaveGenesisBlockRoot(t.Context(), genesisRoot))
-	require.NoError(t, db.SaveState(t.Context(), genesisState, genesisRoot))
+	genesis.StoreStateDuringTest(t, genesisState)
 
 	b := util.NewBeaconBlock()
 	b.Block.Slot = 1

beacon-chain/db/kv/wss_test.go

@@ -3,9 +3,9 @@ package kv
 import (
 	"testing"
 
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/genesis"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 )
@@ -18,7 +18,11 @@ func TestSaveOrigin(t *testing.T) {
 	ctx := t.Context()
 	db := setupDB(t)
 
-	st, err := genesis.State(params.MainnetName)
+	// Initialize genesis with mainnet config - this will load the embedded mainnet state
+	require.NoError(t, genesis.Initialize(ctx, t.TempDir()))
+
+	// Get the initialized genesis state
+	st, err := genesis.State()
 	require.NoError(t, err)
 
 	sb, err := st.MarshalSSZ()

beacon-chain/execution/BUILD.bazel

@@ -125,6 +125,7 @@ go_test(
         "//contracts/deposit/mock:go_default_library",
         "//crypto/bls:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//genesis:go_default_library",
         "//monitoring/clientstats:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",

beacon-chain/execution/service_test.go

@@ -22,6 +22,7 @@ import (
 	contracts "github.com/OffchainLabs/prysm/v6/contracts/deposit"
 	"github.com/OffchainLabs/prysm/v6/contracts/deposit/mock"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	"github.com/OffchainLabs/prysm/v6/monitoring/clientstats"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -381,6 +382,7 @@ func TestInitDepositCache_OK(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, s.cfg.beaconDB.SaveGenesisBlockRoot(t.Context(), blockRootA))
 	require.NoError(t, s.cfg.beaconDB.SaveState(t.Context(), emptyState, blockRootA))
+	genesis.StoreStateDuringTest(t, emptyState)
 	s.chainStartData.Chainstarted = true
 	require.NoError(t, s.initDepositCaches(t.Context(), ctrs))
 	require.Equal(t, 3, len(s.cfg.depositCache.PendingContainers(t.Context(), nil)))
@@ -446,6 +448,7 @@ func TestInitDepositCacheWithFinalization_OK(t *testing.T) {
 	require.NoError(t, s.cfg.beaconDB.SaveGenesisBlockRoot(t.Context(), headRoot))
 	require.NoError(t, s.cfg.beaconDB.SaveState(t.Context(), emptyState, headRoot))
 	require.NoError(t, stateGen.SaveState(t.Context(), headRoot, emptyState))
+	genesis.StoreStateDuringTest(t, emptyState)
 	s.cfg.stateGen = stateGen
 	require.NoError(t, emptyState.SetEth1DepositIndex(3))
 
@@ -594,6 +597,7 @@ func TestService_EnsureConsistentPowchainData(t *testing.T) {
 	require.NoError(t, err)
 	assert.NoError(t, genState.SetSlot(1000))
 
+	genesis.StoreStateDuringTest(t, genState)
 	require.NoError(t, s1.cfg.beaconDB.SaveGenesisData(t.Context(), genState))
 	_, err = s1.validPowchainData(t.Context())
 	require.NoError(t, err)
@@ -655,6 +659,7 @@ func TestService_EnsureValidPowchainData(t *testing.T) {
 	require.NoError(t, err)
 	assert.NoError(t, genState.SetSlot(1000))
 
+	genesis.StoreStateDuringTest(t, genState)
 	require.NoError(t, s1.cfg.beaconDB.SaveGenesisData(t.Context(), genState))
 
 	err = s1.cfg.beaconDB.SaveExecutionChainData(t.Context(), &ethpb.ETH1ChainData{

beacon-chain/node/BUILD.bazel

@@ -3,6 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
     name = "go_default_library",
     srcs = [
+        "clear_db.go",
         "config.go",
         "log.go",
         "node.go",
@@ -49,7 +50,6 @@ go_library(
         "//beacon-chain/sync/backfill:go_default_library",
         "//beacon-chain/sync/backfill/coverage:go_default_library",
         "//beacon-chain/sync/checkpoint:go_default_library",
-        "//beacon-chain/sync/genesis:go_default_library",
         "//beacon-chain/sync/initial-sync:go_default_library",
         "//beacon-chain/verification:go_default_library",
         "//cmd:go_default_library",
@@ -59,6 +59,7 @@ go_library(
         "//consensus-types/primitives:go_default_library",
         "//container/slice:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//genesis:go_default_library",
         "//monitoring/prometheus:go_default_library",
         "//monitoring/tracing:go_default_library",
         "//runtime:go_default_library",

beacon-chain/node/clear_db.go

@@ -0,0 +1,101 @@
+package node
+
+import (
+	"context"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/filesystem"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/kv"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/slasherkv"
+	"github.com/OffchainLabs/prysm/v6/cmd"
+	"github.com/pkg/errors"
+	"github.com/urfave/cli/v2"
+)
+
+type dbClearer struct {
+	shouldClear bool
+	force       bool
+	confirmed   bool
+}
+
+const (
+	clearConfirmation = "This will delete your beacon chain database stored in your data directory. " +
+		"Your database backups will not be removed - do you want to proceed? (Y/N)"
+
+	clearDeclined = "Database will not be deleted. No changes have been made."
+)
+
+func (c *dbClearer) clearKV(ctx context.Context, db *kv.Store) (*kv.Store, error) {
+	if !c.shouldProceed() {
+		return db, nil
+	}
+
+	log.Warning("Removing database")
+	if err := db.ClearDB(); err != nil {
+		return nil, errors.Wrap(err, "could not clear database")
+	}
+	return kv.NewKVStore(ctx, db.DatabasePath())
+}
+
+func (c *dbClearer) clearBlobs(bs *filesystem.BlobStorage) error {
+	if !c.shouldProceed() {
+		return nil
+	}
+
+	log.Warning("Removing blob storage")
+	if err := bs.Clear(); err != nil {
+		return errors.Wrap(err, "could not clear blob storage")
+	}
+
+	return nil
+}
+
+func (c *dbClearer) clearColumns(cs *filesystem.DataColumnStorage) error {
+	if !c.shouldProceed() {
+		return nil
+	}
+
+	log.Warning("Removing data columns storage")
+	if err := cs.Clear(); err != nil {
+		return errors.Wrap(err, "could not clear data columns storage")
+	}
+
+	return nil
+}
+
+func (c *dbClearer) clearSlasher(ctx context.Context, db *slasherkv.Store) (*slasherkv.Store, error) {
+	if !c.shouldProceed() {
+		return db, nil
+	}
+
+	log.Warning("Removing slasher database")
+	if err := db.ClearDB(); err != nil {
+		return nil, errors.Wrap(err, "could not clear slasher database")
+	}
+	return slasherkv.NewKVStore(ctx, db.DatabasePath())
+}
+
+func (c *dbClearer) shouldProceed() bool {
+	if !c.shouldClear {
+		return false
+	}
+	if c.force {
+		return true
+	}
+	if !c.confirmed {
+		confirmed, err := cmd.ConfirmAction(clearConfirmation, clearDeclined)
+		if err != nil {
+			log.WithError(err).Error("Not clearing db due to confirmation error")
+			return false
+		}
+		c.confirmed = confirmed
+	}
+	return c.confirmed
+}
+
+func newDbClearer(cliCtx *cli.Context) *dbClearer {
+	force := cliCtx.Bool(cmd.ForceClearDB.Name)
+	return &dbClearer{
+		shouldClear: cliCtx.Bool(cmd.ClearDB.Name) || force,
+		force:       force,
+	}
+}

beacon-chain/node/node.go

@@ -52,7 +52,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/sync/backfill"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/sync/backfill/coverage"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/sync/checkpoint"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/sync/genesis"
 	initialsync "github.com/OffchainLabs/prysm/v6/beacon-chain/sync/initial-sync"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/verification"
 	"github.com/OffchainLabs/prysm/v6/cmd"
@@ -62,6 +61,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/container/slice"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	"github.com/OffchainLabs/prysm/v6/genesis"
 	"github.com/OffchainLabs/prysm/v6/monitoring/prometheus"
 	"github.com/OffchainLabs/prysm/v6/runtime"
 	"github.com/OffchainLabs/prysm/v6/runtime/prereqs"
@@ -113,7 +113,7 @@ type BeaconNode struct {
 	slasherAttestationsFeed  *event.Feed
 	finalizedStateAtStartUp  state.BeaconState
 	serviceFlagOpts          *serviceFlagOpts
-	GenesisInitializer       genesis.Initializer
+	GenesisProviders         []genesis.Provider
 	CheckpointInitializer    checkpoint.Initializer
 	forkChoicer              forkchoice.ForkChoicer
 	clockWaiter              startup.ClockWaiter
@@ -127,6 +127,7 @@ type BeaconNode struct {
 	syncChecker              *initialsync.SyncChecker
 	slasherEnabled           bool
 	lcStore                  *lightclient.Store
+	ConfigOptions            []params.Option
 }
 
 // New creates a new node instance, sets up configuration options, and registers
@@ -135,18 +136,13 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 	if err := configureBeacon(cliCtx); err != nil {
 		return nil, errors.Wrap(err, "could not set beacon configuration options")
 	}
-
-	// Initializes any forks here.
-	params.BeaconConfig().InitializeForkSchedule()
-
-	registry := runtime.NewServiceRegistry()
 	ctx := cliCtx.Context
 
 	beacon := &BeaconNode{
 		cliCtx:                  cliCtx,
 		ctx:                     ctx,
 		cancel:                  cancel,
-		services:                registry,
+		services:                runtime.NewServiceRegistry(),
 		stop:                    make(chan struct{}),
 		stateFeed:               new(event.Feed),
 		blockFeed:               new(event.Feed),
@@ -173,6 +169,25 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 		}
 	}
 
+	dbClearer := newDbClearer(cliCtx)
+	dataDir := cliCtx.String(cmd.DataDirFlag.Name)
+	boltFname := filepath.Join(dataDir, kv.BeaconNodeDbDirName)
+	kvdb, err := openDB(ctx, boltFname, dbClearer)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not open database")
+	}
+	beacon.db = kvdb
+
+	providers := append(beacon.GenesisProviders, kv.NewLegacyGenesisProvider(kvdb))
+	if err := genesis.Initialize(ctx, dataDir, providers...); err != nil {
+		return nil, errors.Wrap(err, "could not initialize genesis state")
+	}
+
+	beacon.ConfigOptions = append([]params.Option{params.WithGenesisValidatorsRoot(genesis.ValidatorsRoot())}, beacon.ConfigOptions...)
+	params.BeaconConfig().ApplyOptions(beacon.ConfigOptions...)
+	params.BeaconConfig().InitializeForkSchedule()
+	params.LogDigests(params.BeaconConfig())
+
 	synchronizer := startup.NewClockSynchronizer()
 	beacon.clockWaiter = synchronizer
 	beacon.forkChoicer = doublylinkedtree.New()
@@ -191,6 +206,9 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 		}
 		beacon.BlobStorage = blobs
 	}
+	if err := dbClearer.clearBlobs(beacon.BlobStorage); err != nil {
+		return nil, errors.Wrap(err, "could not clear blob storage")
+	}
 
 	if beacon.DataColumnStorage == nil {
 		dataColumnStorage, err := filesystem.NewDataColumnStorage(cliCtx.Context, beacon.DataColumnStorageOptions...)
@@ -200,8 +218,11 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 
 		beacon.DataColumnStorage = dataColumnStorage
 	}
+	if err := dbClearer.clearColumns(beacon.DataColumnStorage); err != nil {
+		return nil, errors.Wrap(err, "could not clear data column storage")
+	}
 
-	bfs, err := startBaseServices(cliCtx, beacon, depositAddress)
+	bfs, err := startBaseServices(cliCtx, beacon, depositAddress, dbClearer)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not start modules")
 	}
@@ -289,7 +310,7 @@ func configureBeacon(cliCtx *cli.Context) error {
 	return nil
 }
 
-func startBaseServices(cliCtx *cli.Context, beacon *BeaconNode, depositAddress string) (*backfill.Store, error) {
+func startBaseServices(cliCtx *cli.Context, beacon *BeaconNode, depositAddress string, clearer *dbClearer) (*backfill.Store, error) {
 	ctx := cliCtx.Context
 	log.Debugln("Starting DB")
 	if err := beacon.startDB(cliCtx, depositAddress); err != nil {
@@ -299,7 +320,7 @@ func startBaseServices(cliCtx *cli.Context, beacon *BeaconNode, depositAddress s
 	beacon.BlobStorage.WarmCache()
 
 	log.Debugln("Starting Slashing DB")
-	if err := beacon.startSlasherDB(cliCtx); err != nil {
+	if err := beacon.startSlasherDB(cliCtx, clearer); err != nil {
 		return nil, errors.Wrap(err, "could not start slashing DB")
 	}
 
@@ -479,43 +500,6 @@ func (b *BeaconNode) Close() {
 	close(b.stop)
 }
 
-func (b *BeaconNode) clearDB(clearDB, forceClearDB bool, d *kv.Store, dbPath string) (*kv.Store, error) {
-	var err error
-	clearDBConfirmed := false
-
-	if clearDB && !forceClearDB {
-		const (
-			actionText = "This will delete your beacon chain database stored in your data directory. " +
-				"Your database backups will not be removed - do you want to proceed? (Y/N)"
-
-			deniedText = "Database will not be deleted. No changes have been made."
-		)
-
-		clearDBConfirmed, err = cmd.ConfirmAction(actionText, deniedText)
-		if err != nil {
-			return nil, errors.Wrapf(err, "could not confirm action")
-		}
-	}
-
-	if clearDBConfirmed || forceClearDB {
-		log.Warning("Removing database")
-		if err := d.ClearDB(); err != nil {
-			return nil, errors.Wrap(err, "could not clear database")
-		}
-
-		if err := b.BlobStorage.Clear(); err != nil {
-			return nil, errors.Wrap(err, "could not clear blob storage")
-		}
-
-		d, err = kv.NewKVStore(b.ctx, dbPath)
-		if err != nil {
-			return nil, errors.Wrap(err, "could not create new database")
-		}
-	}
-
-	return d, nil
-}
-
 func (b *BeaconNode) checkAndSaveDepositContract(depositAddress string) error {
 	knownContract, err := b.db.DepositContractAddress(b.ctx)
 	if err != nil {
@@ -539,60 +523,36 @@ func (b *BeaconNode) checkAndSaveDepositContract(depositAddress string) error {
 	return nil
 }
 
-func (b *BeaconNode) startDB(cliCtx *cli.Context, depositAddress string) error {
-	var depositCache cache.DepositCache
-
-	baseDir := cliCtx.String(cmd.DataDirFlag.Name)
-	dbPath := filepath.Join(baseDir, kv.BeaconNodeDbDirName)
-	clearDBRequired := cliCtx.Bool(cmd.ClearDB.Name)
-	forceClearDBRequired := cliCtx.Bool(cmd.ForceClearDB.Name)
-
+func openDB(ctx context.Context, dbPath string, clearer *dbClearer) (*kv.Store, error) {
 	log.WithField("databasePath", dbPath).Info("Checking DB")
 
-	d, err := kv.NewKVStore(b.ctx, dbPath)
+	d, err := kv.NewKVStore(ctx, dbPath)
 	if err != nil {
-		return errors.Wrapf(err, "could not create database at %s", dbPath)
+		return nil, errors.Wrapf(err, "could not create database at %s", dbPath)
 	}
 
-	if clearDBRequired || forceClearDBRequired {
-		d, err = b.clearDB(clearDBRequired, forceClearDBRequired, d, dbPath)
-		if err != nil {
-			return errors.Wrap(err, "could not clear database")
-		}
+	d, err = clearer.clearKV(ctx, d)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not clear database")
 	}
 
-	if err := d.RunMigrations(b.ctx); err != nil {
-		return err
-	}
+	return d, d.RunMigrations(ctx)
+}
 
-	b.db = d
-
-	depositCache, err = depositsnapshot.New()
+func (b *BeaconNode) startDB(cliCtx *cli.Context, depositAddress string) error {
+	depositCache, err := depositsnapshot.New()
 	if err != nil {
 		return errors.Wrap(err, "could not create deposit cache")
 	}
-
 	b.depositCache = depositCache
 
-	if b.GenesisInitializer != nil {
-		if err := b.GenesisInitializer.Initialize(b.ctx, d); err != nil {
-			if errors.Is(err, db.ErrExistingGenesisState) {
-				return errors.Errorf("Genesis state flag specified but a genesis state "+
-					"exists already. Run again with --%s and/or ensure you are using the "+
-					"appropriate testnet flag to load the given genesis state.", cmd.ClearDB.Name)
-			}
-
-			return errors.Wrap(err, "could not load genesis from file")
-		}
-	}
-
 	if err := b.db.EnsureEmbeddedGenesis(b.ctx); err != nil {
 		return errors.Wrap(err, "could not ensure embedded genesis")
 	}
 
 	if b.CheckpointInitializer != nil {
 		log.Info("Checkpoint sync - Downloading origin state and block")
-		if err := b.CheckpointInitializer.Initialize(b.ctx, d); err != nil {
+		if err := b.CheckpointInitializer.Initialize(b.ctx, b.db); err != nil {
 			return err
 		}
 	}
@@ -604,49 +564,25 @@ func (b *BeaconNode) startDB(cliCtx *cli.Context, depositAddress string) error {
 	log.WithField("address", depositAddress).Info("Deposit contract")
 	return nil
 }
-
-func (b *BeaconNode) startSlasherDB(cliCtx *cli.Context) error {
+func (b *BeaconNode) startSlasherDB(cliCtx *cli.Context, clearer *dbClearer) error {
 	if !b.slasherEnabled {
 		return nil
 	}
 	baseDir := cliCtx.String(cmd.DataDirFlag.Name)
-
 	if cliCtx.IsSet(flags.SlasherDirFlag.Name) {
 		baseDir = cliCtx.String(flags.SlasherDirFlag.Name)
 	}
 
 	dbPath := filepath.Join(baseDir, kv.BeaconNodeDbDirName)
-	clearDB := cliCtx.Bool(cmd.ClearDB.Name)
-	forceClearDB := cliCtx.Bool(cmd.ForceClearDB.Name)
-
 	log.WithField("databasePath", dbPath).Info("Checking DB")
-
 	d, err := slasherkv.NewKVStore(b.ctx, dbPath)
 	if err != nil {
 		return err
 	}
-	clearDBConfirmed := false
-	if clearDB && !forceClearDB {
-		actionText := "This will delete your beacon chain database stored in your data directory. " +
-			"Your database backups will not be removed - do you want to proceed? (Y/N)"
-		deniedText := "Database will not be deleted. No changes have been made."
-		clearDBConfirmed, err = cmd.ConfirmAction(actionText, deniedText)
-		if err != nil {
-			return err
-		}
+	d, err = clearer.clearSlasher(b.ctx, d)
+	if err != nil {
+		return errors.Wrap(err, "could not clear slasher database")
 	}
-	if clearDBConfirmed || forceClearDB {
-		log.Warning("Removing database")
-		if err := d.ClearDB(); err != nil {
-			return errors.Wrap(err, "could not clear database")
-		}
-
-		d, err = slasherkv.NewKVStore(b.ctx, dbPath)
-		if err != nil {
-			return errors.Wrap(err, "could not create new database")
-		}
-	}
-
 	b.slasherDB = d
 	return nil
 }
@@ -909,6 +845,7 @@ func (b *BeaconNode) registerInitialSyncService(complete chan struct{}) error {
 		ClockWaiter:         b.clockWaiter,
 		InitialSyncComplete: complete,
 		BlobStorage:         b.BlobStorage,
+		DataColumnStorage:   b.DataColumnStorage,
 	}, opts...)
 	return b.services.RegisterService(is)
 }
@@ -1171,7 +1108,7 @@ func (b *BeaconNode) registerPrunerService(cliCtx *cli.Context) error {
 
 func (b *BeaconNode) RegisterBackfillService(cliCtx *cli.Context, bfs *backfill.Store) error {
 	pa := peers.NewAssigner(b.fetchP2P().Peers(), b.forkChoicer)
-	bf, err := backfill.NewService(cliCtx.Context, bfs, b.BlobStorage, b.clockWaiter, b.fetchP2P(), pa, b.BackfillOpts...)
+	bf, err := backfill.NewService(cliCtx.Context, bfs, b.BlobStorage, b.DataColumnStorage, b.clockWaiter, b.fetchP2P(), pa, b.BackfillOpts...)
 	if err != nil {
 		return errors.Wrap(err, "error initializing backfill service")
 	}

beacon-chain/node/options.go

@@ -5,6 +5,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/builder"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/db/filesystem"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/execution"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 )
 
 // Option for beacon node configuration.
@@ -51,6 +52,13 @@ func WithBlobStorageOptions(opt ...filesystem.BlobStorageOption) Option {
 	}
 }
 
+func WithConfigOptions(opt ...params.Option) Option {
+	return func(bn *BeaconNode) error {
+		bn.ConfigOptions = append(bn.ConfigOptions, opt...)
+		return nil
+	}
+}
+
 // WithDataColumnStorage sets the DataColumnStorage backend for the BeaconNode
 func WithDataColumnStorage(bs *filesystem.DataColumnStorage) Option {
 	return func(bn *BeaconNode) error {

beacon-chain/p2p/BUILD.bazel

@@ -72,7 +72,6 @@ go_library(
         "//monitoring/tracing:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
         "//network:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/metadata:go_default_library",
         "//runtime:go_default_library",
@@ -169,7 +168,6 @@ go_test(
         "//crypto/hash:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//network:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/eth/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/metadata:go_default_library",
@@ -179,6 +177,7 @@ go_test(
         "//testing/util:go_default_library",
         "//time:go_default_library",
         "//time/slots:go_default_library",
+        "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_ethereum_go_ethereum//crypto:go_default_library",
         "@com_github_ethereum_go_ethereum//p2p/discover:go_default_library",
         "@com_github_ethereum_go_ethereum//p2p/enode:go_default_library",

beacon-chain/p2p/broadcaster.go

@@ -15,7 +15,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/crypto/hash"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
@@ -274,14 +273,8 @@ func (s *Service) BroadcastLightClientOptimisticUpdate(ctx context.Context, upda
 		return errors.New("attempted to broadcast nil light client optimistic update")
 	}
 
-	forkDigest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(update.AttestedHeader().Beacon().Slot), s.genesisValidatorsRoot)
-	if err != nil {
-		err := errors.Wrap(err, "could not retrieve fork digest")
-		tracing.AnnotateError(span, err)
-		return err
-	}
-
-	if err := s.broadcastObject(ctx, update, lcOptimisticToTopic(forkDigest)); err != nil {
+	digest := params.ForkDigest(slots.ToEpoch(update.AttestedHeader().Beacon().Slot))
+	if err := s.broadcastObject(ctx, update, lcOptimisticToTopic(digest)); err != nil {
 		log.WithError(err).Debug("Failed to broadcast light client optimistic update")
 		err := errors.Wrap(err, "could not publish message")
 		tracing.AnnotateError(span, err)
@@ -300,13 +293,7 @@ func (s *Service) BroadcastLightClientFinalityUpdate(ctx context.Context, update
 		return errors.New("attempted to broadcast nil light client finality update")
 	}
 
-	forkDigest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(update.AttestedHeader().Beacon().Slot), s.genesisValidatorsRoot)
-	if err != nil {
-		err := errors.Wrap(err, "could not retrieve fork digest")
-		tracing.AnnotateError(span, err)
-		return err
-	}
-
+	forkDigest := params.ForkDigest(slots.ToEpoch(update.AttestedHeader().Beacon().Slot))
 	if err := s.broadcastObject(ctx, update, lcFinalityToTopic(forkDigest)); err != nil {
 		log.WithError(err).Debug("Failed to broadcast light client finality update")
 		err := errors.Wrap(err, "could not publish message")
@@ -318,15 +305,15 @@ func (s *Service) BroadcastLightClientFinalityUpdate(ctx context.Context, update
 	return nil
 }
 
-// BroadcastDataColumn broadcasts a data column to the p2p network, the message is assumed to be
+// BroadcastDataColumnSidecar broadcasts a data column to the p2p network, the message is assumed to be
 // broadcasted to the current fork and to the input column subnet.
-func (s *Service) BroadcastDataColumn(
+func (s *Service) BroadcastDataColumnSidecar(
 	root [fieldparams.RootLength]byte,
 	dataColumnSubnet uint64,
 	dataColumnSidecar *ethpb.DataColumnSidecar,
 ) error {
 	// Add tracing to the function.
-	ctx, span := trace.StartSpan(s.ctx, "p2p.BroadcastDataColumn")
+	ctx, span := trace.StartSpan(s.ctx, "p2p.BroadcastDataColumnSidecar")
 	defer span.End()
 
 	// Ensure the data column sidecar is not nil.
@@ -343,12 +330,12 @@ func (s *Service) BroadcastDataColumn(
 	}
 
 	// Non-blocking broadcast, with attempts to discover a column subnet peer if none available.
-	go s.internalBroadcastDataColumn(ctx, root, dataColumnSubnet, dataColumnSidecar, forkDigest)
+	go s.internalBroadcastDataColumnSidecar(ctx, root, dataColumnSubnet, dataColumnSidecar, forkDigest)
 
 	return nil
 }
 
-func (s *Service) internalBroadcastDataColumn(
+func (s *Service) internalBroadcastDataColumnSidecar(
 	ctx context.Context,
 	root [fieldparams.RootLength]byte,
 	columnSubnet uint64,
@@ -356,7 +343,7 @@ func (s *Service) internalBroadcastDataColumn(
 	forkDigest [fieldparams.VersionLength]byte,
 ) {
 	// Add tracing to the function.
-	_, span := trace.StartSpan(ctx, "p2p.internalBroadcastDataColumn")
+	_, span := trace.StartSpan(ctx, "p2p.internalBroadcastDataColumnSidecar")
 	defer span.End()
 
 	// Increase the number of broadcast attempts.

beacon-chain/p2p/broadcaster_test.go

@@ -15,12 +15,13 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/scorers"
 	p2ptest "github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/testing"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/cmd/beacon-chain/flags"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/wrapper"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	testpb "github.com/OffchainLabs/prysm/v6/proto/testing"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -59,6 +60,7 @@ func TestService_Broadcast(t *testing.T) {
 	topic := "/eth2/%x/testing"
 	// Set a test gossip mapping for testpb.TestSimpleMessage.
 	GossipTypeMapping[reflect.TypeOf(msg)] = topic
+	p.clock = startup.NewClock(p.genesisTime, bytesutil.ToBytes32(p.genesisValidatorsRoot))
 	digest, err := p.currentForkDigest()
 	require.NoError(t, err)
 	topic = fmt.Sprintf(topic, digest)
@@ -551,9 +553,7 @@ func TestService_BroadcastLightClientOptimisticUpdate(t *testing.T) {
 	require.NoError(t, err)
 
 	GossipTypeMapping[reflect.TypeOf(msg)] = LightClientOptimisticUpdateTopicFormat
-	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot), p.genesisValidatorsRoot)
-	require.NoError(t, err)
-	topic := fmt.Sprintf(LightClientOptimisticUpdateTopicFormat, digest)
+	topic := fmt.Sprintf(LightClientOptimisticUpdateTopicFormat, params.ForkDigest(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot)))
 
 	// External peer subscribes to the topic.
 	topic += p.Encoding().ProtocolSuffix()
@@ -617,9 +617,7 @@ func TestService_BroadcastLightClientFinalityUpdate(t *testing.T) {
 	require.NoError(t, err)
 
 	GossipTypeMapping[reflect.TypeOf(msg)] = LightClientFinalityUpdateTopicFormat
-	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot), p.genesisValidatorsRoot)
-	require.NoError(t, err)
-	topic := fmt.Sprintf(LightClientFinalityUpdateTopicFormat, digest)
+	topic := fmt.Sprintf(LightClientFinalityUpdateTopicFormat, params.ForkDigest(slots.ToEpoch(msg.AttestedHeader().Beacon().Slot)))
 
 	// External peer subscribes to the topic.
 	topic += p.Encoding().ProtocolSuffix()
@@ -718,7 +716,7 @@ func TestService_BroadcastDataColumn(t *testing.T) {
 
 	// Attempt to broadcast nil object should fail.
 	var emptyRoot [fieldparams.RootLength]byte
-	err = service.BroadcastDataColumn(emptyRoot, subnet, nil)
+	err = service.BroadcastDataColumnSidecar(emptyRoot, subnet, nil)
 	require.ErrorContains(t, "attempted to broadcast nil", err)
 
 	// Subscribe to the topic.
@@ -729,7 +727,7 @@ func TestService_BroadcastDataColumn(t *testing.T) {
 	time.Sleep(50 * time.Millisecond)
 
 	// Broadcast to peers and wait.
-	err = service.BroadcastDataColumn(emptyRoot, subnet, sidecar)
+	err = service.BroadcastDataColumnSidecar(emptyRoot, subnet, sidecar)
 	require.NoError(t, err)
 
 	// Receive the message.

beacon-chain/p2p/discovery.go

@@ -585,8 +585,11 @@ func (s *Service) createLocalNode(
 	localNode.SetFallbackIP(ipAddr)
 	localNode.SetFallbackUDP(udpPort)
 
-	localNode, err = addForkEntry(localNode, s.genesisTime, s.genesisValidatorsRoot)
-	if err != nil {
+	currentSlot := slots.CurrentSlot(s.genesisTime)
+	currentEpoch := slots.ToEpoch(currentSlot)
+	current := params.GetNetworkScheduleEntry(currentEpoch)
+	next := params.NextNetworkScheduleEntry(currentEpoch)
+	if err := updateENR(localNode, current, next); err != nil {
 		return nil, errors.Wrap(err, "could not add eth2 fork version entry to enr")
 	}
 
@@ -707,7 +710,7 @@ func (s *Service) filterPeer(node *enode.Node) bool {
 	// Ignore nodes that don't match our fork digest.
 	nodeENR := node.Record()
 	if s.genesisValidatorsRoot != nil {
-		if err := s.compareForkENR(nodeENR); err != nil {
+		if err := compareForkENR(s.dv5Listener.LocalNode().Node().Record(), nodeENR); err != nil {
 			log.WithError(err).Trace("Fork ENR mismatches between peer and local node")
 			return false
 		}

beacon-chain/p2p/fork.go

@@ -3,12 +3,9 @@ package p2p
 import (
 	"bytes"
 	"fmt"
-	"time"
 
 	"github.com/OffchainLabs/prysm/v6/config/params"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	prysmTime "github.com/OffchainLabs/prysm/v6/time"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
@@ -16,6 +13,8 @@ import (
 	"github.com/sirupsen/logrus"
 )
 
+var errEth2ENRDigestMismatch = errors.New("fork digest of peer does not match local value")
+
 // ENR key used for Ethereum consensus-related fork data.
 var eth2ENRKey = params.BeaconNetworkConfig().ETH2Key
 
@@ -25,29 +24,31 @@ func (s *Service) currentForkDigest() ([4]byte, error) {
 	if !s.isInitialized() {
 		return [4]byte{}, errors.New("state is not initialized")
 	}
-	return forks.CreateForkDigest(s.genesisTime, s.genesisValidatorsRoot)
+
+	currentSlot := slots.CurrentSlot(s.genesisTime)
+	currentEpoch := slots.ToEpoch(currentSlot)
+	return params.ForkDigest(currentEpoch), nil
 }
 
 // Compares fork ENRs between an incoming peer's record and our node's
 // local record values for current and next fork version/epoch.
-func (s *Service) compareForkENR(record *enr.Record) error {
-	currentRecord := s.dv5Listener.LocalNode().Node().Record()
-	peerForkENR, err := forkEntry(record)
+func compareForkENR(self, peer *enr.Record) error {
+	peerForkENR, err := forkEntry(peer)
 	if err != nil {
 		return err
 	}
-	currentForkENR, err := forkEntry(currentRecord)
+	currentForkENR, err := forkEntry(self)
 	if err != nil {
 		return err
 	}
-	enrString, err := SerializeENR(record)
+	enrString, err := SerializeENR(peer)
 	if err != nil {
 		return err
 	}
 	// Clients SHOULD connect to peers with current_fork_digest, next_fork_version,
 	// and next_fork_epoch that match local values.
 	if !bytes.Equal(peerForkENR.CurrentForkDigest, currentForkENR.CurrentForkDigest) {
-		return fmt.Errorf(
+		return errors.Wrapf(errEth2ENRDigestMismatch,
 			"fork digest of peer with ENR %s: %v, does not match local value: %v",
 			enrString,
 			peerForkENR.CurrentForkDigest,
@@ -74,41 +75,36 @@ func (s *Service) compareForkENR(record *enr.Record) error {
 	return nil
 }
 
-// Adds a fork entry as an ENR record under the Ethereum consensus EnrKey for
-// the local node. The fork entry is an ssz-encoded enrForkID type
-// which takes into account the current fork version from the current
-// epoch to create a fork digest, the next fork version,
-// and the next fork epoch.
-func addForkEntry(
-	node *enode.LocalNode,
-	genesisTime time.Time,
-	genesisValidatorsRoot []byte,
-) (*enode.LocalNode, error) {
-	digest, err := forks.CreateForkDigest(genesisTime, genesisValidatorsRoot)
-	if err != nil {
-		return nil, err
-	}
-	currentSlot := slots.CurrentSlot(genesisTime)
-	currentEpoch := slots.ToEpoch(currentSlot)
-	if prysmTime.Now().Before(genesisTime) {
-		currentEpoch = 0
-	}
-	nextForkVersion, nextForkEpoch, err := forks.NextForkData(currentEpoch)
-	if err != nil {
-		return nil, err
-	}
+func updateENR(node *enode.LocalNode, entry, next params.NetworkScheduleEntry) error {
 	enrForkID := &pb.ENRForkID{
-		CurrentForkDigest: digest[:],
-		NextForkVersion:   nextForkVersion[:],
-		NextForkEpoch:     nextForkEpoch,
+		CurrentForkDigest: entry.ForkDigest[:],
+		NextForkVersion:   next.ForkVersion[:],
+		NextForkEpoch:     next.Epoch,
 	}
+	if entry.Epoch == next.Epoch {
+		enrForkID.NextForkEpoch = params.BeaconConfig().FarFutureEpoch
+	}
+	logFields := logrus.Fields{
+		"CurrentForkDigest": fmt.Sprintf("%#x", enrForkID.CurrentForkDigest),
+		"NextForkVersion":   fmt.Sprintf("%#x", enrForkID.NextForkVersion),
+		"NextForkEpoch":     fmt.Sprintf("%d", enrForkID.NextForkEpoch),
+	}
+	if params.BeaconConfig().FuluForkEpoch != params.BeaconConfig().FarFutureEpoch {
+		if entry.ForkDigest == next.ForkDigest {
+			node.Set(enr.WithEntry(nfdEnrKey, make([]byte, len(next.ForkDigest))))
+		} else {
+			node.Set(enr.WithEntry(nfdEnrKey, next.ForkDigest[:]))
+		}
+		logFields["NextForkDigest"] = fmt.Sprintf("%#x", next.ForkDigest)
+	}
+	log.WithFields(logFields).Info("Updating ENR Fork ID")
 	enc, err := enrForkID.MarshalSSZ()
 	if err != nil {
-		return nil, err
+		return err
 	}
 	forkEntry := enr.WithEntry(eth2ENRKey, enc)
 	node.Set(forkEntry)
-	return node, nil
+	return nil
 }
 
 // Retrieves an enrForkID from an ENR record by key lookup

beacon-chain/p2p/fork_test.go

@@ -8,254 +8,121 @@ import (
 	"testing"
 	"time"
 
-	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
-	testDB "github.com/OffchainLabs/prysm/v6/beacon-chain/db/testing"
-	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/config/params"
-	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
+	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
-	ma "github.com/multiformats/go-multiaddr"
 	"github.com/sirupsen/logrus"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )
 
-func TestStartDiscv5_DifferentForkDigests(t *testing.T) {
-	const port = 2000
-
-	ipAddr, pkey := createAddrAndPrivKey(t)
-	genesisTime := time.Now()
-	genesisValidatorsRoot := make([]byte, fieldparams.RootLength)
-	db := testDB.SetupDB(t)
-
-	s := &Service{
-		cfg: &Config{
-			UDPPort:              uint(port),
-			StateNotifier:        &mock.MockStateNotifier{},
-			PingInterval:         testPingInterval,
-			DisableLivenessCheck: true,
-			DB:                   db,
-		},
-		genesisTime:           genesisTime,
-		genesisValidatorsRoot: genesisValidatorsRoot,
-		custodyInfo:           &custodyInfo{},
-	}
-	bootListener, err := s.createListener(ipAddr, pkey)
-	require.NoError(t, err)
-	defer bootListener.Close()
-
-	// Allow bootnode's table to have its initial refresh. This allows
-	// inbound nodes to be added in.
-	time.Sleep(5 * time.Second)
-
-	bootNode := bootListener.Self()
-	cfg := &Config{
-		Discv5BootStrapAddrs: []string{bootNode.String()},
-		UDPPort:              uint(port),
-		StateNotifier:        &mock.MockStateNotifier{},
-		PingInterval:         testPingInterval,
-		DisableLivenessCheck: true,
-		DB:                   db,
-	}
-
-	var listeners []*listenerWrapper
-	for i := 1; i <= 5; i++ {
-		port := 3000 + i
-		cfg.UDPPort = uint(port)
-		ipAddr, pkey := createAddrAndPrivKey(t)
-
-		// We give every peer a different genesis validators root, which
-		// will cause each peer to have a different ForkDigest, preventing
-		// them from connecting according to our discovery rules for Ethereum consensus.
-		root := make([]byte, 32)
-		copy(root, strconv.Itoa(port))
-		s = &Service{
-			cfg:                   cfg,
-			genesisTime:           genesisTime,
-			genesisValidatorsRoot: root,
-			custodyInfo:           &custodyInfo{},
-		}
-		listener, err := s.startDiscoveryV5(ipAddr, pkey)
-		assert.NoError(t, err, "Could not start discovery for node")
-		listeners = append(listeners, listener)
-	}
-	defer func() {
-		// Close down all peers.
-		for _, listener := range listeners {
-			listener.Close()
-		}
-	}()
-
-	// Wait for the nodes to have their local routing tables to be populated with the other nodes
-	time.Sleep(discoveryWaitTime)
-
-	lastListener := listeners[len(listeners)-1]
-	nodes := lastListener.Lookup(bootNode.ID())
-	if len(nodes) < 4 {
-		t.Errorf("The node's local table doesn't have the expected number of nodes. "+
-			"Expected more than or equal to %d but got %d", 4, len(nodes))
-	}
-
-	// Now, we start a new p2p service. It should have no peers aside from the
-	// bootnode given all nodes provided by discv5 will have different fork digests.
-	cfg.UDPPort = 14000
-	cfg.TCPPort = 14001
-	cfg.MaxPeers = 30
-	s, err = NewService(t.Context(), cfg)
-	require.NoError(t, err)
-	s.genesisTime = genesisTime
-	s.genesisValidatorsRoot = make([]byte, 32)
-	s.dv5Listener = lastListener
-
-	addrs := make([]ma.Multiaddr, 0)
-
-	for _, node := range nodes {
-		if s.filterPeer(node) {
-			nodeAddrs, err := retrieveMultiAddrsFromNode(node)
-			require.NoError(t, err)
-			addrs = append(addrs, nodeAddrs...)
-		}
-	}
-
-	// We should not have valid peers if the fork digest mismatched.
-	assert.Equal(t, 0, len(addrs), "Expected 0 valid peers")
-	require.NoError(t, s.Stop())
-}
-
-func TestStartDiscv5_SameForkDigests_DifferentNextForkData(t *testing.T) {
-	const port = 2000
-
+func TestCompareForkENR(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
-	hook := logTest.NewGlobal()
+	params.BeaconConfig().InitializeForkSchedule()
 	logrus.SetLevel(logrus.TraceLevel)
-	ipAddr, pkey := createAddrAndPrivKey(t)
-	genesisTime := time.Now()
-	genesisValidatorsRoot := make([]byte, 32)
-	db := testDB.SetupDB(t)
 
-	s := &Service{
-		cfg:                   &Config{UDPPort: uint(port), PingInterval: testPingInterval, DisableLivenessCheck: true, DB: db},
-		genesisTime:           genesisTime,
-		genesisValidatorsRoot: genesisValidatorsRoot,
-		custodyInfo:           &custodyInfo{},
-	}
-	bootListener, err := s.createListener(ipAddr, pkey)
-	require.NoError(t, err)
-	defer bootListener.Close()
+	db, err := enode.OpenDB("")
+	assert.NoError(t, err)
+	_, k := createAddrAndPrivKey(t)
+	clock := startup.NewClock(time.Now(), params.BeaconConfig().GenesisValidatorsRoot)
+	current := params.GetNetworkScheduleEntry(clock.CurrentEpoch())
+	next := params.NextNetworkScheduleEntry(clock.CurrentEpoch())
+	self := enode.NewLocalNode(db, k)
+	require.NoError(t, updateENR(self, current, next))
 
-	// Allow bootnode's table to have its initial refresh. This allows
-	// inbound nodes to be added in.
-	time.Sleep(5 * time.Second)
-
-	bootNode := bootListener.Self()
-	cfg := &Config{
-		Discv5BootStrapAddrs: []string{bootNode.String()},
-		UDPPort:              uint(port),
-		PingInterval:         testPingInterval,
-		DisableLivenessCheck: true,
-		DB:                   db,
+	cases := []struct {
+		name      string
+		expectErr error
+		expectLog string
+		node      func(t *testing.T) *enode.Node
+	}{
+		{
+			name: "match",
+			node: func(t *testing.T) *enode.Node {
+				// Create a peer with the same current fork digest and next fork version/epoch.
+				peer := enode.NewLocalNode(db, k)
+				require.NoError(t, updateENR(peer, current, next))
+				return peer.Node()
+			},
+		},
+		{
+			name: "current digest mismatch",
+			node: func(t *testing.T) *enode.Node {
+				// Create a peer with the same current fork digest and next fork version/epoch.
+				peer := enode.NewLocalNode(db, k)
+				testDigest := [4]byte{0xFF, 0xFF, 0xFF, 0xFF}
+				require.NotEqual(t, current.ForkDigest, testDigest, "ensure test fork digest is unique")
+				currentCopy := current
+				currentCopy.ForkDigest = testDigest
+				require.NoError(t, updateENR(peer, currentCopy, next))
+				return peer.Node()
+			},
+			expectErr: errEth2ENRDigestMismatch,
+		},
+		{
+			name: "next fork version mismatch",
+			node: func(t *testing.T) *enode.Node {
+				// Create a peer with the same current fork digest and next fork version/epoch.
+				peer := enode.NewLocalNode(db, k)
+				testVersion := [4]byte{0xFF, 0xFF, 0xFF, 0xFF}
+				require.NotEqual(t, next.ForkVersion, testVersion, "ensure test fork version is unique")
+				nextCopy := next
+				nextCopy.ForkVersion = testVersion
+				require.NoError(t, updateENR(peer, current, nextCopy))
+				return peer.Node()
+			},
+			expectLog: "Peer matches fork digest but has different next fork version",
+		},
+		{
+			name: "next fork epoch mismatch",
+			node: func(t *testing.T) *enode.Node {
+				// Create a peer with the same current fork digest and next fork version/epoch.
+				peer := enode.NewLocalNode(db, k)
+				nextCopy := next
+				nextCopy.Epoch = nextCopy.Epoch + 1
+				require.NoError(t, updateENR(peer, current, nextCopy))
+				return peer.Node()
+			},
+			expectLog: "Peer matches fork digest but has different next fork epoch",
+		},
 	}
 
-	var listeners []*listenerWrapper
-	for i := 1; i <= 5; i++ {
-		port := 3000 + i
-		cfg.UDPPort = uint(port)
-		ipAddr, pkey := createAddrAndPrivKey(t)
-		c := params.BeaconConfig().Copy()
-		nextForkEpoch := primitives.Epoch(i)
-		c.ForkVersionSchedule[[4]byte{'A', 'B', 'C', 'D'}] = nextForkEpoch
-		params.OverrideBeaconConfig(c)
-
-		// We give every peer a different genesis validators root, which
-		// will cause each peer to have a different ForkDigest, preventing
-		// them from connecting according to our discovery rules for Ethereum consensus.
-		s = &Service{
-			cfg:                   cfg,
-			genesisTime:           genesisTime,
-			genesisValidatorsRoot: genesisValidatorsRoot,
-			custodyInfo:           &custodyInfo{},
-		}
-		listener, err := s.startDiscoveryV5(ipAddr, pkey)
-		assert.NoError(t, err, "Could not start discovery for node")
-		listeners = append(listeners, listener)
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			hook := logTest.NewGlobal()
+			peer := c.node(t)
+			err := compareForkENR(self.Node().Record(), peer.Record())
+			if c.expectErr != nil {
+				require.ErrorIs(t, err, c.expectErr, "Expected error to match")
+			} else {
+				require.NoError(t, err, "Expected no error comparing fork ENRs")
+			}
+			if c.expectLog != "" {
+				require.LogsContain(t, hook, c.expectLog, "Expected log message not found")
+			}
+		})
 	}
-	defer func() {
-		// Close down all peers.
-		for _, listener := range listeners {
-			listener.Close()
-		}
-	}()
-
-	// Wait for the nodes to have their local routing tables to be populated with the other nodes
-	time.Sleep(discoveryWaitTime)
-
-	lastListener := listeners[len(listeners)-1]
-	nodes := lastListener.Lookup(bootNode.ID())
-	if len(nodes) < 4 {
-		t.Errorf("The node's local table doesn't have the expected number of nodes. "+
-			"Expected more than or equal to %d but got %d", 4, len(nodes))
-	}
-
-	// Now, we start a new p2p service. It should have no peers aside from the
-	// bootnode given all nodes provided by discv5 will have different fork digests.
-	cfg.UDPPort = 14000
-	cfg.TCPPort = 14001
-	cfg.MaxPeers = 30
-	cfg.StateNotifier = &mock.MockStateNotifier{}
-	s, err = NewService(t.Context(), cfg)
-	require.NoError(t, err)
-
-	s.genesisTime = genesisTime
-	s.genesisValidatorsRoot = make([]byte, 32)
-	s.dv5Listener = lastListener
-	addrs := make([]ma.Multiaddr, 0, len(nodes))
-
-	for _, node := range nodes {
-		if s.filterPeer(node) {
-			nodeAddrs, err := retrieveMultiAddrsFromNode(node)
-			require.NoError(t, err)
-			addrs = append(addrs, nodeAddrs...)
-		}
-	}
-	if len(addrs) == 0 {
-		t.Error("Expected to have valid peers, got 0")
-	}
-
-	require.LogsContain(t, hook, "Peer matches fork digest but has different next fork epoch")
-	require.NoError(t, s.Stop())
 }
 
 func TestDiscv5_AddRetrieveForkEntryENR(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
-	c := params.BeaconConfig().Copy()
-	c.ForkVersionSchedule = map[[4]byte]primitives.Epoch{
-		bytesutil.ToBytes4(params.BeaconConfig().GenesisForkVersion): 0,
-		{0, 0, 0, 1}: 1,
-	}
-	nextForkEpoch := primitives.Epoch(1)
-	nextForkVersion := []byte{0, 0, 0, 1}
-	params.OverrideBeaconConfig(c)
+	params.BeaconConfig().InitializeForkSchedule()
 
-	genesisTime := time.Now()
-	genesisValidatorsRoot := make([]byte, 32)
-	digest, err := forks.CreateForkDigest(genesisTime, make([]byte, 32))
-	require.NoError(t, err)
+	clock := startup.NewClock(time.Now(), params.BeaconConfig().GenesisValidatorsRoot)
+	current := params.GetNetworkScheduleEntry(clock.CurrentEpoch())
+	next := params.NextNetworkScheduleEntry(clock.CurrentEpoch())
 	enrForkID := &pb.ENRForkID{
-		CurrentForkDigest: digest[:],
-		NextForkVersion:   nextForkVersion,
-		NextForkEpoch:     nextForkEpoch,
+		CurrentForkDigest: current.ForkDigest[:],
+		NextForkVersion:   next.ForkVersion[:],
+		NextForkEpoch:     next.Epoch,
 	}
 	enc, err := enrForkID.MarshalSSZ()
 	require.NoError(t, err)
 	entry := enr.WithEntry(eth2ENRKey, enc)
-	// In epoch 1 of current time, the fork version should be
-	// {0, 0, 0, 1} according to the configuration override above.
 	temp := t.TempDir()
 	randNum := rand.Int()
 	tempPath := path.Join(temp, strconv.Itoa(randNum))
@@ -267,18 +134,16 @@ func TestDiscv5_AddRetrieveForkEntryENR(t *testing.T) {
 	localNode := enode.NewLocalNode(db, pkey)
 	localNode.Set(entry)
 
-	want, err := signing.ComputeForkDigest([]byte{0, 0, 0, 0}, genesisValidatorsRoot)
-	require.NoError(t, err)
-
 	resp, err := forkEntry(localNode.Node().Record())
 	require.NoError(t, err)
-	assert.DeepEqual(t, want[:], resp.CurrentForkDigest)
-	assert.DeepEqual(t, nextForkVersion, resp.NextForkVersion)
-	assert.Equal(t, nextForkEpoch, resp.NextForkEpoch, "Unexpected next fork epoch")
+	assert.Equal(t, hexutil.Encode(current.ForkDigest[:]), hexutil.Encode(resp.CurrentForkDigest))
+	assert.Equal(t, hexutil.Encode(next.ForkVersion[:]), hexutil.Encode(resp.NextForkVersion))
+	assert.Equal(t, next.Epoch, resp.NextForkEpoch, "Unexpected next fork epoch")
 }
 
-func TestAddForkEntry_Genesis(t *testing.T) {
+func TestAddForkEntry_NextForkVersion(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
+	params.BeaconConfig().InitializeForkSchedule()
 	temp := t.TempDir()
 	randNum := rand.Int()
 	tempPath := path.Join(temp, strconv.Itoa(randNum))
@@ -288,17 +153,135 @@ func TestAddForkEntry_Genesis(t *testing.T) {
 	db, err := enode.OpenDB("")
 	require.NoError(t, err)
 
-	bCfg := params.MainnetConfig()
-	bCfg.ForkVersionSchedule = map[[4]byte]primitives.Epoch{}
-	bCfg.ForkVersionSchedule[bytesutil.ToBytes4(params.BeaconConfig().GenesisForkVersion)] = bCfg.GenesisEpoch
-	params.OverrideBeaconConfig(bCfg)
-
 	localNode := enode.NewLocalNode(db, pkey)
-	localNode, err = addForkEntry(localNode, time.Now().Add(10*time.Second), bytesutil.PadTo([]byte{'A', 'B', 'C', 'D'}, 32))
+	clock := startup.NewClock(time.Now(), params.BeaconConfig().GenesisValidatorsRoot)
+	current := params.GetNetworkScheduleEntry(clock.CurrentEpoch())
+	next := params.NextNetworkScheduleEntry(clock.CurrentEpoch())
+	// Add the fork entry to the local node's ENR.
+	require.NoError(t, updateENR(localNode, current, next))
+	fe, err := forkEntry(localNode.Node().Record())
 	require.NoError(t, err)
-	forkEntry, err := forkEntry(localNode.Node().Record())
-	require.NoError(t, err)
-	assert.DeepEqual(t,
-		params.BeaconConfig().GenesisForkVersion, forkEntry.NextForkVersion,
+	assert.Equal(t,
+		hexutil.Encode(params.BeaconConfig().AltairForkVersion), hexutil.Encode(fe.NextForkVersion),
 		"Wanted Next Fork Version to be equal to genesis fork version")
+
+	last := params.LastForkEpoch()
+	current = params.GetNetworkScheduleEntry(last)
+	next = params.NextNetworkScheduleEntry(last)
+	require.NoError(t, updateENR(localNode, current, next))
+	entry := params.NextNetworkScheduleEntry(last)
+	fe, err = forkEntry(localNode.Node().Record())
+	require.NoError(t, err)
+	assert.Equal(t,
+		hexutil.Encode(entry.ForkVersion[:]), hexutil.Encode(fe.NextForkVersion),
+		"Wanted Next Fork Version to be equal to last entry in schedule")
+
+}
+
+func TestUpdateENR_FuluForkDigest(t *testing.T) {
+	setupTest := func(t *testing.T, fuluEnabled bool) (*enode.LocalNode, func()) {
+		params.SetupTestConfigCleanup(t)
+
+		cfg := params.BeaconConfig().Copy()
+		if fuluEnabled {
+			cfg.FuluForkEpoch = 100
+		} else {
+			cfg.FuluForkEpoch = cfg.FarFutureEpoch
+		}
+		cfg.FuluForkVersion = []byte{5, 0, 0, 0}
+		params.OverrideBeaconConfig(cfg)
+		cfg.InitializeForkSchedule()
+
+		pkey, err := privKey(&Config{DataDir: t.TempDir()})
+		require.NoError(t, err, "Could not get private key")
+		db, err := enode.OpenDB("")
+		require.NoError(t, err)
+
+		localNode := enode.NewLocalNode(db, pkey)
+		cleanup := func() {
+			db.Close()
+		}
+
+		return localNode, cleanup
+	}
+
+	tests := []struct {
+		name         string
+		fuluEnabled  bool
+		currentEntry params.NetworkScheduleEntry
+		nextEntry    params.NetworkScheduleEntry
+		validateNFD  func(t *testing.T, localNode *enode.LocalNode, nextEntry params.NetworkScheduleEntry)
+	}{
+		{
+			name:        "different digests sets nfd to next digest",
+			fuluEnabled: true,
+			currentEntry: params.NetworkScheduleEntry{
+				Epoch:       50,
+				ForkDigest:  [4]byte{1, 2, 3, 4},
+				ForkVersion: [4]byte{1, 0, 0, 0},
+			},
+			nextEntry: params.NetworkScheduleEntry{
+				Epoch:       100,
+				ForkDigest:  [4]byte{5, 6, 7, 8}, // Different from current
+				ForkVersion: [4]byte{2, 0, 0, 0},
+			},
+			validateNFD: func(t *testing.T, localNode *enode.LocalNode, nextEntry params.NetworkScheduleEntry) {
+				var nfdValue []byte
+				err := localNode.Node().Record().Load(enr.WithEntry(nfdEnrKey, &nfdValue))
+				require.NoError(t, err)
+				assert.DeepEqual(t, nextEntry.ForkDigest[:], nfdValue, "nfd entry should equal next fork digest")
+			},
+		},
+		{
+			name:        "same digests sets nfd to empty",
+			fuluEnabled: true,
+			currentEntry: params.NetworkScheduleEntry{
+				Epoch:       50,
+				ForkDigest:  [4]byte{1, 2, 3, 4},
+				ForkVersion: [4]byte{1, 0, 0, 0},
+			},
+			nextEntry: params.NetworkScheduleEntry{
+				Epoch:       100,
+				ForkDigest:  [4]byte{1, 2, 3, 4}, // Same as current
+				ForkVersion: [4]byte{2, 0, 0, 0},
+			},
+			validateNFD: func(t *testing.T, localNode *enode.LocalNode, nextEntry params.NetworkScheduleEntry) {
+				var nfdValue []byte
+				err := localNode.Node().Record().Load(enr.WithEntry(nfdEnrKey, &nfdValue))
+				require.NoError(t, err)
+				assert.DeepEqual(t, make([]byte, len(nextEntry.ForkDigest)), nfdValue, "nfd entry should be empty bytes when digests are same")
+			},
+		},
+		{
+			name:        "fulu disabled does not add nfd field",
+			fuluEnabled: false,
+			currentEntry: params.NetworkScheduleEntry{
+				Epoch:       50,
+				ForkDigest:  [4]byte{1, 2, 3, 4},
+				ForkVersion: [4]byte{1, 0, 0, 0},
+			},
+			nextEntry: params.NetworkScheduleEntry{
+				Epoch:       100,
+				ForkDigest:  [4]byte{5, 6, 7, 8}, // Different from current
+				ForkVersion: [4]byte{2, 0, 0, 0},
+			},
+			validateNFD: func(t *testing.T, localNode *enode.LocalNode, nextEntry params.NetworkScheduleEntry) {
+				var nfdValue []byte
+				err := localNode.Node().Record().Load(enr.WithEntry(nfdEnrKey, &nfdValue))
+				require.ErrorContains(t, "missing ENR key", err, "nfd field should not be present when Fulu fork is disabled")
+			},
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			localNode, cleanup := setupTest(t, tt.fuluEnabled)
+			defer cleanup()
+
+			currentEntry := tt.currentEntry
+			nextEntry := tt.nextEntry
+			require.NoError(t, updateENR(localNode, currentEntry, nextEntry))
+			tt.validateNFD(t, localNode, nextEntry)
+		})
+	}
 }

beacon-chain/p2p/fork_watcher.go

@@ -9,27 +9,26 @@ import (
 // updates the node's discovery service to reflect any new fork version
 // changes.
 func (s *Service) forkWatcher() {
+	// Exit early if discovery is disabled - there's no ENR to update
+	if s.dv5Listener == nil {
+		log.Debug("Discovery disabled, exiting fork watcher")
+		return
+	}
+
 	slotTicker := slots.NewSlotTicker(s.genesisTime, params.BeaconConfig().SecondsPerSlot)
+	var scheduleEntry params.NetworkScheduleEntry
 	for {
 		select {
 		case currSlot := <-slotTicker.C():
-			currEpoch := slots.ToEpoch(currSlot)
-			if currEpoch == params.BeaconConfig().AltairForkEpoch ||
-				currEpoch == params.BeaconConfig().BellatrixForkEpoch ||
-				currEpoch == params.BeaconConfig().CapellaForkEpoch ||
-				currEpoch == params.BeaconConfig().DenebForkEpoch ||
-				currEpoch == params.BeaconConfig().ElectraForkEpoch ||
-				currEpoch == params.BeaconConfig().FuluForkEpoch {
-				// If we are in the fork epoch, we update our enr with
-				// the updated fork digest. These repeatedly does
-				// this over the epoch, which might be slightly wasteful
-				// but is fine nonetheless.
-				if s.dv5Listener != nil { // make sure it's not a local network
-					_, err := addForkEntry(s.dv5Listener.LocalNode(), s.genesisTime, s.genesisValidatorsRoot)
-					if err != nil {
-						log.WithError(err).Error("Could not add fork entry")
-					}
+			currentEpoch := slots.ToEpoch(currSlot)
+			newEntry := params.GetNetworkScheduleEntry(currentEpoch)
+			if newEntry.ForkDigest != scheduleEntry.ForkDigest {
+				nextEntry := params.NextNetworkScheduleEntry(currentEpoch)
+				if err := updateENR(s.dv5Listener.LocalNode(), newEntry, nextEntry); err != nil {
+					log.WithFields(newEntry.LogFields()).WithError(err).Error("Could not add fork entry")
+					continue // don't replace scheduleEntry until this succeeds
 				}
+				scheduleEntry = newEntry
 			}
 		case <-s.ctx.Done():
 			log.Debug("Context closed, exiting goroutine")

beacon-chain/p2p/interfaces.go

@@ -51,7 +51,7 @@ type (
 		BroadcastBlob(ctx context.Context, subnet uint64, blob *ethpb.BlobSidecar) error
 		BroadcastLightClientOptimisticUpdate(ctx context.Context, update interfaces.LightClientOptimisticUpdate) error
 		BroadcastLightClientFinalityUpdate(ctx context.Context, update interfaces.LightClientFinalityUpdate) error
-		BroadcastDataColumn(root [fieldparams.RootLength]byte, columnSubnet uint64, dataColumnSidecar *ethpb.DataColumnSidecar) error
+		BroadcastDataColumnSidecar(root [fieldparams.RootLength]byte, columnSubnet uint64, dataColumnSidecar *ethpb.DataColumnSidecar) error
 	}
 
 	// SetStreamHandler configures p2p to handle streams of a certain topic ID.

beacon-chain/p2p/message_id.go

@@ -7,7 +7,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/crypto/hash"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/math"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
 )
 
@@ -39,7 +38,7 @@ func MsgID(genesisValidatorsRoot []byte, pmsg *pubsubpb.Message) string {
 		copy(msg, "invalid")
 		return bytesutil.UnsafeCastToString(msg)
 	}
-	_, fEpoch, err := forks.RetrieveForkDataFromDigest(digest, genesisValidatorsRoot)
+	_, fEpoch, err := params.ForkDataFromDigest(digest)
 	if err != nil {
 		// Impossible condition that should
 		// never be hit.

beacon-chain/p2p/message_id_test.go

@@ -7,10 +7,10 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/crypto/hash"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/golang/snappy"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
@@ -18,28 +18,27 @@ import (
 
 func TestMsgID_HashesCorrectly(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
-	genesisValidatorsRoot := bytesutil.PadTo([]byte{'A'}, 32)
-	d, err := forks.CreateForkDigest(time.Now(), genesisValidatorsRoot)
-	assert.NoError(t, err)
+	clock := startup.NewClock(time.Now(), bytesutil.ToBytes32([]byte{'A'}))
+	valRoot := clock.GenesisValidatorsRoot()
+	d := params.ForkDigest(clock.CurrentEpoch())
 	tpc := fmt.Sprintf(p2p.BlockSubnetTopicFormat, d)
 	invalidSnappy := [32]byte{'J', 'U', 'N', 'K'}
 	pMsg := &pubsubpb.Message{Data: invalidSnappy[:], Topic: &tpc}
 	hashedData := hash.Hash(append(params.BeaconConfig().MessageDomainInvalidSnappy[:], pMsg.Data...))
 	msgID := string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, pMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(valRoot[:], pMsg), "Got incorrect msg id")
 
 	validObj := [32]byte{'v', 'a', 'l', 'i', 'd'}
 	enc := snappy.Encode(nil, validObj[:])
 	nMsg := &pubsubpb.Message{Data: enc, Topic: &tpc}
 	hashedData = hash.Hash(append(params.BeaconConfig().MessageDomainValidSnappy[:], validObj[:]...))
 	msgID = string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, nMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(valRoot[:], nMsg), "Got incorrect msg id")
 }
 
 func TestMessageIDFunction_HashesCorrectlyAltair(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
-	genesisValidatorsRoot := bytesutil.PadTo([]byte{'A'}, 32)
-	d, err := signing.ComputeForkDigest(params.BeaconConfig().AltairForkVersion, genesisValidatorsRoot)
+	d, err := signing.ComputeForkDigest(params.BeaconConfig().AltairForkVersion, params.BeaconConfig().GenesisValidatorsRoot[:])
 	assert.NoError(t, err)
 	tpc := fmt.Sprintf(p2p.BlockSubnetTopicFormat, d)
 	topicLen := uint64(len(tpc))
@@ -52,7 +51,7 @@ func TestMessageIDFunction_HashesCorrectlyAltair(t *testing.T) {
 	combinedObj = append(combinedObj, pMsg.Data...)
 	hashedData := hash.Hash(combinedObj)
 	msgID := string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, pMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(params.BeaconConfig().GenesisValidatorsRoot[:], pMsg), "Got incorrect msg id")
 
 	validObj := [32]byte{'v', 'a', 'l', 'i', 'd'}
 	enc := snappy.Encode(nil, validObj[:])
@@ -63,13 +62,12 @@ func TestMessageIDFunction_HashesCorrectlyAltair(t *testing.T) {
 	combinedObj = append(combinedObj, validObj[:]...)
 	hashedData = hash.Hash(combinedObj)
 	msgID = string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, nMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(params.BeaconConfig().GenesisValidatorsRoot[:], nMsg), "Got incorrect msg id")
 }
 
 func TestMessageIDFunction_HashesCorrectlyBellatrix(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
-	genesisValidatorsRoot := bytesutil.PadTo([]byte{'A'}, 32)
-	d, err := signing.ComputeForkDigest(params.BeaconConfig().BellatrixForkVersion, genesisValidatorsRoot)
+	d, err := signing.ComputeForkDigest(params.BeaconConfig().BellatrixForkVersion, params.BeaconConfig().GenesisValidatorsRoot[:])
 	assert.NoError(t, err)
 	tpc := fmt.Sprintf(p2p.BlockSubnetTopicFormat, d)
 	topicLen := uint64(len(tpc))
@@ -82,7 +80,7 @@ func TestMessageIDFunction_HashesCorrectlyBellatrix(t *testing.T) {
 	combinedObj = append(combinedObj, pMsg.Data...)
 	hashedData := hash.Hash(combinedObj)
 	msgID := string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, pMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(params.BeaconConfig().GenesisValidatorsRoot[:], pMsg), "Got incorrect msg id")
 
 	validObj := [32]byte{'v', 'a', 'l', 'i', 'd'}
 	enc := snappy.Encode(nil, validObj[:])
@@ -93,7 +91,7 @@ func TestMessageIDFunction_HashesCorrectlyBellatrix(t *testing.T) {
 	combinedObj = append(combinedObj, validObj[:]...)
 	hashedData = hash.Hash(combinedObj)
 	msgID = string(hashedData[:20])
-	assert.Equal(t, msgID, p2p.MsgID(genesisValidatorsRoot, nMsg), "Got incorrect msg id")
+	assert.Equal(t, msgID, p2p.MsgID(params.BeaconConfig().GenesisValidatorsRoot[:], nMsg), "Got incorrect msg id")
 }
 
 func TestMsgID_WithNilTopic(t *testing.T) {

beacon-chain/p2p/peers/assigner.go

@@ -42,7 +42,7 @@ func (a *Assigner) freshPeers() ([]peer.ID, error) {
 	if flags.Get().MinimumSyncPeers < required {
 		required = flags.Get().MinimumSyncPeers
 	}
-	_, peers := a.ps.BestFinalized(params.BeaconConfig().MaxPeersToSync, a.fc.FinalizedCheckpoint().Epoch)
+	_, peers := a.ps.BestFinalized(-1, a.fc.FinalizedCheckpoint().Epoch)
 	if len(peers) < required {
 		log.WithFields(logrus.Fields{
 			"suitable": len(peers),
@@ -52,27 +52,33 @@ func (a *Assigner) freshPeers() ([]peer.ID, error) {
 	return peers, nil
 }
 
+type AssignmentFilter func([]peer.ID) []peer.ID
+
 // Assign uses the "BestFinalized" method to select the best peers that agree on a canonical block
 // for the configured finalized epoch. At most `n` peers will be returned. The `busy` param can be used
 // to filter out peers that we know we don't want to connect to, for instance if we are trying to limit
 // the number of outbound requests to each peer from a given component.
-func (a *Assigner) Assign(busy map[peer.ID]bool, n int) ([]peer.ID, error) {
+func (a *Assigner) Assign(filter AssignmentFilter) ([]peer.ID, error) {
 	best, err := a.freshPeers()
 	if err != nil {
 		return nil, err
 	}
-	return pickBest(busy, n, best), nil
+	return filter(best), nil
 }
 
-func pickBest(busy map[peer.ID]bool, n int, best []peer.ID) []peer.ID {
-	ps := make([]peer.ID, 0, n)
-	for _, p := range best {
-		if len(ps) == n {
-			return ps
-		}
-		if !busy[p] {
-			ps = append(ps, p)
+// NotBusy is a filter that returns a list of peer.IDs with len() <= n, which are not in the `busy` map.
+// n == -1 will return all peers that are not busy.
+func NotBusy(busy map[peer.ID]bool, n int) AssignmentFilter {
+	return func(peers []peer.ID) []peer.ID {
+		ps := make([]peer.ID, 0)
+		for _, p := range peers {
+			if n > 0 && len(ps) == n {
+				return ps
+			}
+			if !busy[p] {
+				ps = append(ps, p)
+			}
 		}
+		return ps
 	}
-	return ps
 }

beacon-chain/p2p/peers/assigner_test.go

@@ -18,8 +18,9 @@ func TestPickBest(t *testing.T) {
 		expected []peer.ID
 	}{
 		{
-			name: "",
-			n:    0,
+			name:     "don't limit",
+			n:        0,
+			expected: best,
 		},
 		{
 			name:     "none busy",
@@ -88,7 +89,8 @@ func TestPickBest(t *testing.T) {
 			if c.best == nil {
 				c.best = best
 			}
-			pb := pickBest(c.busy, c.n, c.best)
+			filt := NotBusy(c.busy, c.n)
+			pb := filt(c.best)
 			require.Equal(t, len(c.expected), len(pb))
 			for i := range c.expected {
 				require.Equal(t, c.expected[i], pb[i])

beacon-chain/p2p/peers/scorers/gossip_scorer_test.go

@@ -42,7 +42,7 @@ func TestScorers_Gossip_Score(t *testing.T) {
 			},
 			check: func(scorer *scorers.GossipScorer) {
 				assert.Equal(t, 10.0, scorer.Score("peer1"), "Unexpected score")
-				assert.Equal(t, nil, scorer.IsBadPeer("peer1"), "Unexpected bad peer")
+				assert.NoError(t, scorer.IsBadPeer("peer1"), "Unexpected bad peer")
 				_, _, topicMap, err := scorer.GossipData("peer1")
 				assert.NoError(t, err)
 				assert.Equal(t, uint64(100), topicMap["a"].TimeInMesh, "incorrect time in mesh")

beacon-chain/p2p/peers/status.go

@@ -770,7 +770,7 @@ func (p *Status) BestFinalized(maxPeers int, ourFinalizedEpoch primitives.Epoch)
 	}
 
 	// Trim potential peers to at most maxPeers.
-	if len(potentialPIDs) > maxPeers {
+	if maxPeers > 0 && len(potentialPIDs) > maxPeers {
 		potentialPIDs = potentialPIDs[:maxPeers]
 	}
 

beacon-chain/p2p/pubsub.go

@@ -40,7 +40,7 @@ const (
 	rSubD = 8 // random gossip target
 )
 
-var errInvalidTopic = errors.New("invalid topic format")
+var ErrInvalidTopic = errors.New("invalid topic format")
 
 // Specifies the fixed size context length.
 const digestLength = 4
@@ -219,12 +219,12 @@ func convertTopicScores(topicMap map[string]*pubsub.TopicScoreSnapshot) map[stri
 func ExtractGossipDigest(topic string) ([4]byte, error) {
 	// Ensure the topic prefix is correct.
 	if len(topic) < len(gossipTopicPrefix)+1 || topic[:len(gossipTopicPrefix)] != gossipTopicPrefix {
-		return [4]byte{}, errInvalidTopic
+		return [4]byte{}, ErrInvalidTopic
 	}
 	start := len(gossipTopicPrefix)
 	end := strings.Index(topic[start:], "/")
 	if end == -1 { // Ensure a topic suffix exists.
-		return [4]byte{}, errInvalidTopic
+		return [4]byte{}, ErrInvalidTopic
 	}
 	end += start
 	strDigest := topic[start:end]

beacon-chain/p2p/pubsub_filter.go

@@ -1,12 +1,12 @@
 package p2p
 
 import (
+	"encoding/hex"
 	"fmt"
 	"strings"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
 	"github.com/OffchainLabs/prysm/v6/config/params"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
 	"github.com/libp2p/go-libp2p/core/peer"
@@ -32,6 +32,14 @@ var _ pubsub.SubscriptionFilter = (*Service)(nil)
 // (Note: BlobSidecar is not included in this list since it is superseded by DataColumnSidecar)
 const pubsubSubscriptionRequestLimit = 500
 
+func (s *Service) setAllForkDigests() {
+	entries := params.SortedNetworkScheduleEntries()
+	s.allForkDigests = make(map[[4]byte]struct{}, len(entries))
+	for _, entry := range entries {
+		s.allForkDigests[entry.ForkDigest] = struct{}{}
+	}
+}
+
 // CanSubscribe returns true if the topic is of interest and we could subscribe to it.
 func (s *Service) CanSubscribe(topic string) bool {
 	if !s.isInitialized() {
@@ -48,50 +56,18 @@ func (s *Service) CanSubscribe(topic string) bool {
 	if parts[1] != "eth2" {
 		return false
 	}
-	phase0ForkDigest, err := s.currentForkDigest()
+
+	var digest [4]byte
+	dl, err := hex.Decode(digest[:], []byte(parts[2]))
+	if err == nil && dl != 4 {
+		err = fmt.Errorf("expected 4 bytes, got %d", dl)
+	}
 	if err != nil {
-		log.WithError(err).Error("Could not determine fork digest")
+		log.WithError(err).WithField("topic", topic).WithField("digest", parts[2]).Error("CanSubscribe failed to parse message")
 		return false
 	}
-	altairForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().AltairForkEpoch, s.genesisValidatorsRoot)
-	if err != nil {
-		log.WithError(err).Error("Could not determine altair fork digest")
-		return false
-	}
-	bellatrixForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().BellatrixForkEpoch, s.genesisValidatorsRoot)
-	if err != nil {
-		log.WithError(err).Error("Could not determine Bellatrix fork digest")
-		return false
-	}
-	capellaForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().CapellaForkEpoch, s.genesisValidatorsRoot)
-	if err != nil {
-		log.WithError(err).Error("Could not determine Capella fork digest")
-		return false
-	}
-	denebForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().DenebForkEpoch, s.genesisValidatorsRoot)
-	if err != nil {
-		log.WithError(err).Error("Could not determine Deneb fork digest")
-		return false
-	}
-	electraForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().ElectraForkEpoch, s.genesisValidatorsRoot)
-	if err != nil {
-		log.WithError(err).Error("Could not determine Electra fork digest")
-		return false
-	}
-	fuluForkDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().FuluForkEpoch, s.genesisValidatorsRoot)
-	if err != nil {
-		log.WithError(err).Error("Could not determine Fulu fork digest")
-		return false
-	}
-	switch parts[2] {
-	case fmt.Sprintf("%x", phase0ForkDigest):
-	case fmt.Sprintf("%x", altairForkDigest):
-	case fmt.Sprintf("%x", bellatrixForkDigest):
-	case fmt.Sprintf("%x", capellaForkDigest):
-	case fmt.Sprintf("%x", denebForkDigest):
-	case fmt.Sprintf("%x", electraForkDigest):
-	case fmt.Sprintf("%x", fuluForkDigest):
-	default:
+	if _, ok := s.allForkDigests[digest]; !ok {
+		log.WithField("topic", topic).WithField("digest", fmt.Sprintf("%#x", digest)).Error("CanSubscribe failed to find digest in allForkDigests")
 		return false
 	}
 

beacon-chain/p2p/pubsub_filter_test.go

@@ -12,8 +12,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
-	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	prysmTime "github.com/OffchainLabs/prysm/v6/time"
 	pubsubpb "github.com/libp2p/go-libp2p-pubsub/pb"
@@ -22,12 +20,11 @@ import (
 
 func TestService_CanSubscribe(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
-	currentFork := [4]byte{0x01, 0x02, 0x03, 0x04}
+	params.BeaconConfig().InitializeForkSchedule()
 	validProtocolSuffix := "/" + encoder.ProtocolSuffixSSZSnappy
-	genesisTime := time.Now()
-	var valRoot [32]byte
-	digest, err := forks.CreateForkDigest(genesisTime, valRoot[:])
-	assert.NoError(t, err)
+	clock := startup.NewClock(time.Now(), params.BeaconConfig().GenesisValidatorsRoot)
+	currentFork := params.GetNetworkScheduleEntry(clock.CurrentEpoch()).ForkDigest
+	digest := params.ForkDigest(clock.CurrentEpoch())
 	type test struct {
 		name  string
 		topic string
@@ -109,12 +106,14 @@ func TestService_CanSubscribe(t *testing.T) {
 		}
 		tests = append(tests, tt)
 	}
+	valRoot := clock.GenesisValidatorsRoot()
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &Service{
 				genesisValidatorsRoot: valRoot[:],
-				genesisTime:           genesisTime,
+				genesisTime:           clock.GenesisTime(),
 			}
+			s.setAllForkDigests()
 			if got := s.CanSubscribe(tt.topic); got != tt.want {
 				t.Errorf("CanSubscribe(%s) = %v, want %v", tt.topic, got, tt.want)
 			}
@@ -220,11 +219,10 @@ func TestGossipTopicMapping_scanfcheck_GossipTopicFormattingSanityCheck(t *testi
 
 func TestService_FilterIncomingSubscriptions(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
+	params.BeaconConfig().InitializeForkSchedule()
+	clock := startup.NewClock(time.Now(), params.BeaconConfig().GenesisValidatorsRoot)
+	digest := params.ForkDigest(clock.CurrentEpoch())
 	validProtocolSuffix := "/" + encoder.ProtocolSuffixSSZSnappy
-	genesisTime := time.Now()
-	var valRoot [32]byte
-	digest, err := forks.CreateForkDigest(genesisTime, valRoot[:])
-	assert.NoError(t, err)
 	type args struct {
 		id   peer.ID
 		subs []*pubsubpb.RPC_SubOpts
@@ -321,12 +319,14 @@ func TestService_FilterIncomingSubscriptions(t *testing.T) {
 			},
 		},
 	}
+	valRoot := clock.GenesisValidatorsRoot()
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			s := &Service{
 				genesisValidatorsRoot: valRoot[:],
-				genesisTime:           genesisTime,
+				genesisTime:           clock.GenesisTime(),
 			}
+			s.setAllForkDigests()
 			got, err := s.FilterIncomingSubscriptions(tt.args.id, tt.args.subs)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("FilterIncomingSubscriptions() error = %v, wantErr %v", err, tt.wantErr)

beacon-chain/p2p/rpc_topic_mappings.go

@@ -169,7 +169,7 @@ var (
 		RPCDataColumnSidecarsByRangeTopicV1: new(pb.DataColumnSidecarsByRangeRequest),
 
 		// DataColumnSidecarsByRoot v1 Message
-		RPCDataColumnSidecarsByRootTopicV1: new(p2ptypes.DataColumnsByRootIdentifiers),
+		RPCDataColumnSidecarsByRootTopicV1: p2ptypes.DataColumnsByRootIdentifiers{},
 	}
 
 	// Maps all registered protocol prefixes.

beacon-chain/p2p/service.go

@@ -14,6 +14,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers/scorers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/types"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/config/features"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
@@ -63,42 +64,42 @@ var (
 )
 
 // Service for managing peer to peer (p2p) networking.
-type (
-	Service struct {
-		started               bool
-		isPreGenesis          bool
-		pingMethod            func(ctx context.Context, id peer.ID) error
-		pingMethodLock        sync.RWMutex
-		cancel                context.CancelFunc
-		cfg                   *Config
-		peers                 *peers.Status
-		addrFilter            *multiaddr.Filters
-		ipLimiter             *leakybucket.Collector
-		privKey               *ecdsa.PrivateKey
-		metaData              metadata.Metadata
-		pubsub                *pubsub.PubSub
-		joinedTopics          map[string]*pubsub.Topic
-		joinedTopicsLock      sync.RWMutex
-		subnetsLock           map[uint64]*sync.RWMutex
-		subnetsLockLock       sync.Mutex // Lock access to subnetsLock
-		initializationLock    sync.Mutex
-		dv5Listener           ListenerRebooter
-		startupErr            error
-		ctx                   context.Context
-		host                  host.Host
-		genesisTime           time.Time
-		genesisValidatorsRoot []byte
-		activeValidatorCount  uint64
-		peerDisconnectionTime *cache.Cache
-		custodyInfo           *custodyInfo
-		custodyInfoLock       sync.RWMutex // Lock access to custodyInfo
-	}
+type Service struct {
+	started               bool
+	isPreGenesis          bool
+	pingMethod            func(ctx context.Context, id peer.ID) error
+	pingMethodLock        sync.RWMutex
+	cancel                context.CancelFunc
+	cfg                   *Config
+	peers                 *peers.Status
+	addrFilter            *multiaddr.Filters
+	ipLimiter             *leakybucket.Collector
+	privKey               *ecdsa.PrivateKey
+	metaData              metadata.Metadata
+	pubsub                *pubsub.PubSub
+	joinedTopics          map[string]*pubsub.Topic
+	joinedTopicsLock      sync.RWMutex
+	subnetsLock           map[uint64]*sync.RWMutex
+	subnetsLockLock       sync.Mutex // Lock access to subnetsLock
+	initializationLock    sync.Mutex
+	dv5Listener           ListenerRebooter
+	startupErr            error
+	ctx                   context.Context
+	host                  host.Host
+	genesisTime           time.Time
+	genesisValidatorsRoot []byte
+	activeValidatorCount  uint64
+	peerDisconnectionTime *cache.Cache
+	custodyInfo           *custodyInfo
+	custodyInfoLock       sync.RWMutex // Lock access to custodyInfo
+	clock                 *startup.Clock
+	allForkDigests        map[[4]byte]struct{}
+}
 
-	custodyInfo struct {
-		earliestAvailableSlot primitives.Slot
-		groupCount            uint64
-	}
-)
+type custodyInfo struct {
+	earliestAvailableSlot primitives.Slot
+	groupCount            uint64
+}
 
 // NewService initializes a new p2p service compatible with shared.Service interface. No
 // connections are made until the Start function is called during the service registry startup.
@@ -202,6 +203,7 @@ func (s *Service) Start() {
 	// Waits until the state is initialized via an event feed.
 	// Used for fork-related data when connecting peers.
 	s.awaitStateInitialized()
+	s.setAllForkDigests()
 	s.isPreGenesis = false
 
 	var relayNodes []string
@@ -455,7 +457,7 @@ func (s *Service) awaitStateInitialized() {
 	s.genesisTime = clock.GenesisTime()
 	gvr := clock.GenesisValidatorsRoot()
 	s.genesisValidatorsRoot = gvr[:]
-	_, err = s.currentForkDigest() // initialize fork digest cache
+	_, err = s.currentForkDigest()
 	if err != nil {
 		log.WithError(err).Error("Could not initialize fork digest")
 	}

beacon-chain/p2p/service_test.go

@@ -16,8 +16,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/config/params"
-	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	prysmTime "github.com/OffchainLabs/prysm/v6/time"
@@ -346,14 +344,16 @@ func TestPeer_Disconnect(t *testing.T) {
 
 func TestService_JoinLeaveTopic(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
+	params.BeaconConfig().InitializeForkSchedule()
 	ctx, cancel := context.WithTimeout(t.Context(), 3*time.Second)
 	defer cancel()
 	gs := startup.NewClockSynchronizer()
 	s, err := NewService(ctx, &Config{StateNotifier: &mock.MockStateNotifier{}, ClockWaiter: gs, DB: testDB.SetupDB(t)})
 	require.NoError(t, err)
 
-	go s.awaitStateInitialized()
 	fd := initializeStateWithForkDigest(ctx, t, gs)
+	s.setAllForkDigests()
+	s.awaitStateInitialized()
 
 	assert.Equal(t, 0, len(s.joinedTopics))
 
@@ -382,15 +382,13 @@ func TestService_JoinLeaveTopic(t *testing.T) {
 // digest associated with that genesis event.
 func initializeStateWithForkDigest(_ context.Context, t *testing.T, gs startup.ClockSetter) [4]byte {
 	gt := prysmTime.Now()
-	gvr := bytesutil.ToBytes32(bytesutil.PadTo([]byte("genesis validators root"), 32))
-	require.NoError(t, gs.SetClock(startup.NewClock(gt, gvr)))
-
-	fd, err := forks.CreateForkDigest(gt, gvr[:])
-	require.NoError(t, err)
+	gvr := params.BeaconConfig().GenesisValidatorsRoot
+	clock := startup.NewClock(gt, gvr)
+	require.NoError(t, gs.SetClock(clock))
 
 	time.Sleep(50 * time.Millisecond) // wait for pubsub filter to initialize.
 
-	return fd
+	return params.ForkDigest(clock.CurrentEpoch())
 }
 
 func TestService_connectWithPeer(t *testing.T) {

beacon-chain/p2p/subnets.go

@@ -27,6 +27,8 @@ import (
 	"github.com/prysmaticlabs/go-bitfield"
 )
 
+const nfdEnrKey = "nfd" // The ENR record key for "nfd" (Next Fork Digest).
+
 var (
 	attestationSubnetCount = params.BeaconConfig().AttestationSubnetCount
 	syncCommsSubnetCount   = params.BeaconConfig().SyncCommitteeSubnetCount

beacon-chain/p2p/subnets_test.go

@@ -3,7 +3,6 @@ package p2p
 import (
 	"context"
 	"crypto/rand"
-	"encoding/hex"
 	"fmt"
 	"testing"
 	"time"
@@ -36,17 +35,8 @@ func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
 	// find and connect to a node already subscribed to a specific subnet.
 	// In our case: The node i is subscribed to subnet i, with i = 1, 2, 3
 
-	// Define the genesis validators root, to ensure everybody is on the same network.
-	const (
-		genesisValidatorRootStr = "0xdeadbeefcafecafedeadbeefcafecafedeadbeefcafecafedeadbeefcafecafe"
-		subnetCount             = 3
-		minimumPeersPerSubnet   = 1
-	)
-
-	genesisValidatorsRoot, err := hex.DecodeString(genesisValidatorRootStr[2:])
-	require.NoError(t, err)
-
-	// Create a context.
+	const subnetCount = 3
+	const minimumPeersPerSubnet = 1
 	ctx := t.Context()
 
 	// Use shorter period for testing.
@@ -58,6 +48,7 @@ func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
 
 	// Create flags.
 	params.SetupTestConfigCleanup(t)
+	params.BeaconConfig().InitializeForkSchedule()
 	gFlags := new(flags.GlobalFlags)
 	gFlags.MinimumPeersPerSubnet = 1
 	flags.Init(gFlags)
@@ -74,7 +65,7 @@ func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
 	bootNodeService := &Service{
 		cfg:                   &Config{UDPPort: 2000, TCPPort: 3000, QUICPort: 3000, DisableLivenessCheck: true, PingInterval: testPingInterval},
 		genesisTime:           genesisTime,
-		genesisValidatorsRoot: genesisValidatorsRoot,
+		genesisValidatorsRoot: params.BeaconConfig().GenesisValidatorsRoot[:],
 		custodyInfo:           &custodyInfo{},
 	}
 
@@ -111,7 +102,7 @@ func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
 		require.NoError(t, err)
 
 		service.genesisTime = genesisTime
-		service.genesisValidatorsRoot = genesisValidatorsRoot
+		service.genesisValidatorsRoot = params.BeaconConfig().GenesisValidatorsRoot[:]
 		service.custodyInfo = &custodyInfo{}
 
 		nodeForkDigest, err := service.currentForkDigest()
@@ -158,11 +149,11 @@ func TestStartDiscV5_FindAndDialPeersWithSubnet(t *testing.T) {
 		DB:                   db,
 	}
 
-	service, err := NewService(ctx, cfg)
+	service, err := NewService(t.Context(), cfg)
 	require.NoError(t, err)
 
 	service.genesisTime = genesisTime
-	service.genesisValidatorsRoot = genesisValidatorsRoot
+	service.genesisValidatorsRoot = params.BeaconConfig().GenesisValidatorsRoot[:]
 	service.custodyInfo = &custodyInfo{}
 
 	service.Start()

beacon-chain/p2p/testing/fuzz_p2p.go

@@ -167,8 +167,8 @@ func (*FakeP2P) BroadcastLightClientFinalityUpdate(_ context.Context, _ interfac
 	return nil
 }
 
-// BroadcastDataColumn -- fake.
-func (*FakeP2P) BroadcastDataColumn(_ [fieldparams.RootLength]byte, _ uint64, _ *ethpb.DataColumnSidecar) error {
+// BroadcastDataColumnSidecar -- fake.
+func (*FakeP2P) BroadcastDataColumnSidecar(_ [fieldparams.RootLength]byte, _ uint64, _ *ethpb.DataColumnSidecar) error {
 	return nil
 }
 

beacon-chain/p2p/testing/mock_broadcaster.go

@@ -62,8 +62,8 @@ func (m *MockBroadcaster) BroadcastLightClientFinalityUpdate(_ context.Context,
 	return nil
 }
 
-// BroadcastDataColumn broadcasts a data column for mock.
-func (m *MockBroadcaster) BroadcastDataColumn([fieldparams.RootLength]byte, uint64, *ethpb.DataColumnSidecar) error {
+// BroadcastDataColumnSidecar broadcasts a data column for mock.
+func (m *MockBroadcaster) BroadcastDataColumnSidecar([fieldparams.RootLength]byte, uint64, *ethpb.DataColumnSidecar) error {
 	m.BroadcastCalled.Store(true)
 	return nil
 }

beacon-chain/p2p/testing/p2p.go

@@ -228,8 +228,8 @@ func (p *TestP2P) BroadcastLightClientFinalityUpdate(_ context.Context, _ interf
 	return nil
 }
 
-// BroadcastDataColumn broadcasts a data column for mock.
-func (p *TestP2P) BroadcastDataColumn([fieldparams.RootLength]byte, uint64, *ethpb.DataColumnSidecar) error {
+// BroadcastDataColumnSidecar broadcasts a data column for mock.
+func (p *TestP2P) BroadcastDataColumnSidecar([fieldparams.RootLength]byte, uint64, *ethpb.DataColumnSidecar) error {
 	p.BroadcastCalled.Store(true)
 	return nil
 }

beacon-chain/rpc/eth/beacon/handlers.go

@@ -1008,9 +1008,29 @@ func (s *Server) validateConsensus(ctx context.Context, b *eth.GenericSignedBeac
 	}
 
 	parentStateRoot := parentBlock.Block().StateRoot()
-	parentState, err := s.Stater.State(ctx, parentStateRoot[:])
-	if err != nil {
-		return errors.Wrap(err, "could not get parent state")
+	// Check if the state is already cached
+	parentState := transition.NextSlotState(parentBlockRoot[:], blk.Block().Slot())
+	if parentState == nil {
+		// The state is not advanced in the NSC, check first if the parent post-state is head
+		headRoot, err := s.HeadFetcher.HeadRoot(ctx)
+		if err != nil {
+			return errors.Wrap(err, "could not get head root")
+		}
+		if bytes.Equal(headRoot, parentBlockRoot[:]) {
+			parentState, err = s.HeadFetcher.HeadState(ctx)
+			if err != nil {
+				return errors.Wrap(err, "could not get head state")
+			}
+			parentState, err = transition.ProcessSlots(ctx, parentState, blk.Block().Slot())
+			if err != nil {
+				return errors.Wrap(err, "could not process slots to get parent state")
+			}
+		} else {
+			parentState, err = s.Stater.State(ctx, parentStateRoot[:])
+			if err != nil {
+				return errors.Wrap(err, "could not get parent state")
+			}
+		}
 	}
 	_, err = transition.ExecuteStateTransition(ctx, parentState, blk)
 	if err != nil {
@@ -1200,7 +1220,7 @@ func (s *Server) GetStateFork(w http.ResponseWriter, r *http.Request) {
 	fork := st.Fork()
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status"+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -1311,7 +1331,7 @@ func (s *Server) GetCommittees(w http.ResponseWriter, r *http.Request) {
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 
@@ -1492,7 +1512,7 @@ func (s *Server) GetFinalityCheckpoints(w http.ResponseWriter, r *http.Request)
 	}
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -1666,7 +1686,7 @@ func (s *Server) GetPendingConsolidations(w http.ResponseWriter, r *http.Request
 	} else {
 		isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 		if err != nil {
-			httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+			helpers.HandleIsOptimisticError(w, err)
 			return
 		}
 		blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -1722,7 +1742,7 @@ func (s *Server) GetPendingDeposits(w http.ResponseWriter, r *http.Request) {
 	} else {
 		isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 		if err != nil {
-			httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+			helpers.HandleIsOptimisticError(w, err)
 			return
 		}
 		blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -1778,7 +1798,7 @@ func (s *Server) GetPendingPartialWithdrawals(w http.ResponseWriter, r *http.Req
 	} else {
 		isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 		if err != nil {
-			httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+			helpers.HandleIsOptimisticError(w, err)
 			return
 		}
 		blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -1831,7 +1851,7 @@ func (s *Server) GetProposerLookahead(w http.ResponseWriter, r *http.Request) {
 	} else {
 		isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 		if err != nil {
-			httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+			helpers.HandleIsOptimisticError(w, err)
 			return
 		}
 		blockRoot, err := st.LatestBlockHeader().HashTreeRoot()

beacon-chain/rpc/eth/beacon/handlers_state.go

@@ -56,7 +56,7 @@ func (s *Server) GetStateRoot(w http.ResponseWriter, r *http.Request) {
 	}
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -125,7 +125,7 @@ func (s *Server) GetRandao(w http.ResponseWriter, r *http.Request) {
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 
@@ -227,7 +227,7 @@ func (s *Server) GetSyncCommittees(w http.ResponseWriter, r *http.Request) {
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 

beacon-chain/rpc/eth/beacon/handlers_test.go

@@ -3504,9 +3504,14 @@ func TestValidateConsensus(t *testing.T) {
 	require.NoError(t, err)
 	parentRoot, err := parentSbb.Block().HashTreeRoot()
 	require.NoError(t, err)
+	mockChainService := &chainMock.ChainService{
+		State: parentState,
+		Root:  parentRoot[:],
+	}
 	server := &Server{
-		Blocker: &testutil.MockBlocker{RootBlockMap: map[[32]byte]interfaces.ReadOnlySignedBeaconBlock{parentRoot: parentSbb}},
-		Stater:  &testutil.MockStater{StatesByRoot: map[[32]byte]state.BeaconState{bytesutil.ToBytes32(parentBlock.Block.StateRoot): parentState}},
+		Blocker:     &testutil.MockBlocker{RootBlockMap: map[[32]byte]interfaces.ReadOnlySignedBeaconBlock{parentRoot: parentSbb}},
+		Stater:      &testutil.MockStater{StatesByRoot: map[[32]byte]state.BeaconState{bytesutil.ToBytes32(parentBlock.Block.StateRoot): parentState}},
+		HeadFetcher: mockChainService,
 	}
 
 	require.NoError(t, server.validateConsensus(ctx, &eth.GenericSignedBeaconBlock{

beacon-chain/rpc/eth/beacon/handlers_validator.go

@@ -44,7 +44,7 @@ func (s *Server) GetValidators(w http.ResponseWriter, r *http.Request) {
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -222,7 +222,7 @@ func (s *Server) GetValidator(w http.ResponseWriter, r *http.Request) {
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -258,7 +258,7 @@ func (s *Server) GetValidatorBalances(w http.ResponseWriter, r *http.Request) {
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()
@@ -419,7 +419,7 @@ func (s *Server) getValidatorIdentitiesJSON(
 ) {
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateId), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()

beacon-chain/rpc/eth/config/BUILD.bazel

@@ -9,7 +9,6 @@ go_library(
         "//api/server/structs:go_default_library",
         "//config/params:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
-        "//network/forks:go_default_library",
         "//network/httputil:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
@@ -24,8 +23,6 @@ go_test(
         "//api/server/structs:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",
-        "//encoding/bytesutil:go_default_library",
-        "//network/forks:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",

beacon-chain/rpc/eth/config/handlers.go

@@ -11,7 +11,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	log "github.com/sirupsen/logrus"
@@ -35,34 +34,25 @@ func GetForkSchedule(w http.ResponseWriter, r *http.Request) {
 	_, span := trace.StartSpan(r.Context(), "config.GetForkSchedule")
 	defer span.End()
 
-	schedule := params.BeaconConfig().ForkVersionSchedule
+	schedule := params.SortedForkSchedule()
+	data := make([]*structs.Fork, 0, len(schedule))
 	if len(schedule) == 0 {
 		httputil.WriteJson(w, &structs.GetForkScheduleResponse{
-			Data: make([]*structs.Fork, 0),
+			Data: data,
 		})
-		return
 	}
-
-	versions := forks.SortedForkVersions(schedule)
-	chainForks := make([]*structs.Fork, len(schedule))
-	var previous, current []byte
-	for i, v := range versions {
-		if i == 0 {
-			previous = params.BeaconConfig().GenesisForkVersion
-		} else {
-			previous = current
-		}
-		copyV := v
-		current = copyV[:]
-		chainForks[i] = &structs.Fork{
-			PreviousVersion: hexutil.Encode(previous),
-			CurrentVersion:  hexutil.Encode(current),
-			Epoch:           fmt.Sprintf("%d", schedule[v]),
-		}
+	previous := schedule[0]
+	for _, entry := range schedule {
+		data = append(data, &structs.Fork{
+			PreviousVersion: hexutil.Encode(previous.ForkVersion[:]),
+			CurrentVersion:  hexutil.Encode(entry.ForkVersion[:]),
+			Epoch:           fmt.Sprintf("%d", entry.Epoch),
+		})
+		previous = entry
 	}
 
 	httputil.WriteJson(w, &structs.GetForkScheduleResponse{
-		Data: chainForks,
+		Data: data,
 	})
 }
 

beacon-chain/rpc/eth/config/handlers_test.go

@@ -13,8 +13,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/ethereum/go-ethereum/common"
@@ -592,43 +590,34 @@ func TestGetSpec(t *testing.T) {
 
 func TestForkSchedule_Ok(t *testing.T) {
 	t.Run("ok", func(t *testing.T) {
-		genesisForkVersion := []byte("Genesis")
-		firstForkVersion, firstForkEpoch := []byte("Firs"), primitives.Epoch(100)
-		secondForkVersion, secondForkEpoch := []byte("Seco"), primitives.Epoch(200)
-		thirdForkVersion, thirdForkEpoch := []byte("Thir"), primitives.Epoch(300)
 
 		params.SetupTestConfigCleanup(t)
 		config := params.BeaconConfig().Copy()
-		config.GenesisForkVersion = genesisForkVersion
-		// Create fork schedule adding keys in non-sorted order.
-		schedule := make(map[[4]byte]primitives.Epoch, 3)
-		schedule[bytesutil.ToBytes4(secondForkVersion)] = secondForkEpoch
-		schedule[bytesutil.ToBytes4(firstForkVersion)] = firstForkEpoch
-		schedule[bytesutil.ToBytes4(thirdForkVersion)] = thirdForkEpoch
-		config.ForkVersionSchedule = schedule
-		params.OverrideBeaconConfig(config)
+		config.InitializeForkSchedule()
 
 		request := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/config/fork_schedule", nil)
 		writer := httptest.NewRecorder()
 		writer.Body = &bytes.Buffer{}
 
+		genesisStr, firstStr, secondStr := hexutil.Encode(config.GenesisForkVersion), hexutil.Encode(config.AltairForkVersion), hexutil.Encode(config.BellatrixForkVersion)
 		GetForkSchedule(writer, request)
 		require.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.GetForkScheduleResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
-		require.Equal(t, 3, len(resp.Data))
+		schedule := params.SortedForkSchedule()
+		require.Equal(t, len(schedule), len(resp.Data))
 		fork := resp.Data[0]
-		assert.DeepEqual(t, hexutil.Encode(genesisForkVersion), fork.PreviousVersion)
-		assert.DeepEqual(t, hexutil.Encode(firstForkVersion), fork.CurrentVersion)
-		assert.Equal(t, fmt.Sprintf("%d", firstForkEpoch), fork.Epoch)
+		assert.Equal(t, genesisStr, fork.PreviousVersion)
+		assert.Equal(t, genesisStr, fork.CurrentVersion)
+		assert.Equal(t, fmt.Sprintf("%d", config.GenesisEpoch), fork.Epoch)
 		fork = resp.Data[1]
-		assert.DeepEqual(t, hexutil.Encode(firstForkVersion), fork.PreviousVersion)
-		assert.DeepEqual(t, hexutil.Encode(secondForkVersion), fork.CurrentVersion)
-		assert.Equal(t, fmt.Sprintf("%d", secondForkEpoch), fork.Epoch)
+		assert.Equal(t, genesisStr, fork.PreviousVersion)
+		assert.Equal(t, firstStr, fork.CurrentVersion)
+		assert.Equal(t, fmt.Sprintf("%d", config.AltairForkEpoch), fork.Epoch)
 		fork = resp.Data[2]
-		assert.DeepEqual(t, hexutil.Encode(secondForkVersion), fork.PreviousVersion)
-		assert.DeepEqual(t, hexutil.Encode(thirdForkVersion), fork.CurrentVersion)
-		assert.Equal(t, fmt.Sprintf("%d", thirdForkEpoch), fork.Epoch)
+		assert.Equal(t, firstStr, fork.PreviousVersion)
+		assert.Equal(t, secondStr, fork.CurrentVersion)
+		assert.Equal(t, fmt.Sprintf("%d", config.BellatrixForkEpoch), fork.Epoch)
 	})
 	t.Run("correct number of forks", func(t *testing.T) {
 		request := httptest.NewRequest(http.MethodGet, "http://example.com/eth/v1/config/fork_schedule", nil)
@@ -639,8 +628,8 @@ func TestForkSchedule_Ok(t *testing.T) {
 		require.Equal(t, http.StatusOK, writer.Code)
 		resp := &structs.GetForkScheduleResponse{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
-		os := forks.NewOrderedSchedule(params.BeaconConfig())
-		assert.Equal(t, os.Len(), len(resp.Data))
+		os := params.SortedForkSchedule()
+		assert.Equal(t, len(os), len(resp.Data))
 	})
 }
 

beacon-chain/rpc/eth/debug/handlers.go

@@ -46,7 +46,7 @@ func (s *Server) getBeaconStateV2(ctx context.Context, w http.ResponseWriter, id
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, id, s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		httputil.HandleError(w, "Could not check if state is optimistic: "+err.Error(), http.StatusInternalServerError)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}
 	blockRoot, err := st.LatestBlockHeader().HashTreeRoot()

beacon-chain/rpc/eth/helpers/BUILD.bazel

@@ -12,6 +12,7 @@ go_library(
     deps = [
         "//beacon-chain/blockchain:go_default_library",
         "//beacon-chain/db:go_default_library",
+        "//beacon-chain/rpc/eth/shared:go_default_library",
         "//beacon-chain/rpc/lookup:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/stategen:go_default_library",
@@ -21,6 +22,7 @@ go_library(
         "//consensus-types/primitives:go_default_library",
         "//consensus-types/validator:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//network/httputil:go_default_library",
         "//time/slots:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
@@ -40,6 +42,7 @@ go_test(
         "//beacon-chain/blockchain/testing:go_default_library",
         "//beacon-chain/db/testing:go_default_library",
         "//beacon-chain/forkchoice/doubly-linked-tree:go_default_library",
+        "//beacon-chain/rpc/lookup:go_default_library",
         "//beacon-chain/rpc/testutil:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",
@@ -57,5 +60,6 @@ go_test(
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
     ],
 )

beacon-chain/rpc/eth/helpers/error_handling.go

@@ -2,11 +2,14 @@ package helpers
 
 import (
 	"errors"
+	"net/http"
 
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/eth/shared"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/lookup"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/stategen"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
+	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	"google.golang.org/grpc/codes"
 	"google.golang.org/grpc/status"
 )
@@ -28,6 +31,22 @@ func PrepareStateFetchGRPCError(err error) error {
 	return status.Errorf(codes.Internal, "Invalid state ID: %v", err)
 }
 
+// HandleIsOptimisticError handles errors from IsOptimistic function calls and writes appropriate HTTP responses.
+func HandleIsOptimisticError(w http.ResponseWriter, err error) {
+	var fetchErr *lookup.FetchStateError
+	if errors.As(err, &fetchErr) {
+		shared.WriteStateFetchError(w, err)
+		return
+	}
+
+	var blockRootsNotFoundErr *lookup.BlockRootsNotFoundError
+	if errors.As(err, &blockRootsNotFoundErr) {
+		httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusNotFound)
+		return
+	}
+	httputil.HandleError(w, "Could not check optimistic status: "+err.Error(), http.StatusInternalServerError)
+}
+
 // IndexedVerificationFailure represents a collection of verification failures.
 type IndexedVerificationFailure struct {
 	Failures []*SingleIndexedVerificationFailure `json:"failures"`

beacon-chain/rpc/eth/helpers/sync.go

@@ -56,7 +56,8 @@ func IsOptimistic(
 		if bytesutil.IsHex(stateId) {
 			id, err := hexutil.Decode(stateIdString)
 			if err != nil {
-				return false, err
+				e := lookup.NewStateIdParseError(err)
+				return false, &e
 			}
 			return isStateRootOptimistic(ctx, id, optimisticModeFetcher, stateFetcher, chainInfo, database)
 		} else if len(stateId) == 32 {
@@ -127,7 +128,7 @@ func isStateRootOptimistic(
 ) (bool, error) {
 	st, err := stateFetcher.State(ctx, stateId)
 	if err != nil {
-		return true, errors.Wrap(err, "could not fetch state")
+		return true, lookup.NewFetchStateError(err)
 	}
 	if st.Slot() == chainInfo.HeadSlot() {
 		return optimisticModeFetcher.IsOptimistic(ctx)
@@ -137,7 +138,7 @@ func isStateRootOptimistic(
 		return true, errors.Wrapf(err, "could not get block roots for slot %d", st.Slot())
 	}
 	if !has {
-		return true, errors.New("no block roots returned from the database")
+		return true, lookup.NewBlockRootsNotFoundError()
 	}
 	for _, r := range roots {
 		b, err := database.Block(ctx, r)

beacon-chain/rpc/eth/helpers/sync_test.go

@@ -1,12 +1,15 @@
 package helpers
 
 import (
+	"net/http"
+	"net/http/httptest"
 	"strconv"
 	"testing"
 
 	chainmock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	dbtest "github.com/OffchainLabs/prysm/v6/beacon-chain/db/testing"
 	doublylinkedtree "github.com/OffchainLabs/prysm/v6/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/lookup"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/testutil"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
@@ -21,6 +24,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/pkg/errors"
 )
 
 func TestIsOptimistic(t *testing.T) {
@@ -226,7 +230,67 @@ func TestIsOptimistic(t *testing.T) {
 			require.NoError(t, err)
 			assert.Equal(t, true, o)
 		})
+		t.Run("State not found", func(t *testing.T) {
+			b, err := blocks.NewSignedBeaconBlock(util.NewBeaconBlock())
+			require.NoError(t, err)
+			b.SetStateRoot(bytesutil.PadTo([]byte("root"), 32))
+			db := dbtest.SetupDB(t)
+			require.NoError(t, db.SaveBlock(ctx, b))
+			chainSt, err := util.NewBeaconState()
+			require.NoError(t, err)
+			require.NoError(t, chainSt.SetSlot(fieldparams.SlotsPerEpoch))
+			bRoot, err := b.Block().HashTreeRoot()
+			require.NoError(t, err)
+			cs := &chainmock.ChainService{State: chainSt, OptimisticRoots: map[[32]byte]bool{bRoot: true}}
+			mf := &testutil.MockStater{
+				CustomError: lookup.NewFetchStateError(nil),
+			}
+			_, err = IsOptimistic(ctx, []byte(hexutil.Encode(bytesutil.PadTo([]byte("root"), 32))), cs, mf, cs, db)
+			var fetchErr *lookup.FetchStateError
+			require.Equal(t, true, errors.As(err, &fetchErr))
+		})
+
+		t.Run("stateId invalid", func(t *testing.T) {
+			b, err := blocks.NewSignedBeaconBlock(util.NewBeaconBlock())
+			require.NoError(t, err)
+			b.SetStateRoot(bytesutil.PadTo([]byte("root"), 32))
+			db := dbtest.SetupDB(t)
+			require.NoError(t, db.SaveBlock(ctx, b))
+			chainSt, err := util.NewBeaconState()
+			require.NoError(t, err)
+			require.NoError(t, chainSt.SetSlot(fieldparams.SlotsPerEpoch))
+			bRoot, err := b.Block().HashTreeRoot()
+			require.NoError(t, err)
+			cs := &chainmock.ChainService{State: chainSt, OptimisticRoots: map[[32]byte]bool{bRoot: true}}
+			mf := &testutil.MockStater{
+				CustomError: lookup.NewFetchStateError(nil),
+			}
+			_, err = IsOptimistic(ctx, []byte("0xabc"), cs, mf, cs, db)
+			var fetchErr *lookup.FetchStateError
+			require.Equal(t, false, errors.As(err, &fetchErr))
+		})
+		t.Run("block roots not found", func(t *testing.T) {
+			b, err := blocks.NewSignedBeaconBlock(util.NewBeaconBlock())
+			require.NoError(t, err)
+			b.SetStateRoot(bytesutil.PadTo([]byte("root"), 32))
+			db := dbtest.SetupDB(t)
+			require.NoError(t, db.SaveBlock(ctx, b))
+			chainSt, err := util.NewBeaconState()
+			require.NoError(t, err)
+			require.NoError(t, chainSt.SetSlot(fieldparams.SlotsPerEpoch))
+			bRoot, err := b.Block().HashTreeRoot()
+			require.NoError(t, err)
+			cs := &chainmock.ChainService{State: chainSt, OptimisticRoots: map[[32]byte]bool{bRoot: true}}
+			st, err := util.NewBeaconState()
+			require.NoError(t, st.SetSlot(primitives.Slot(fieldparams.SlotsPerEpoch+1)))
+			require.NoError(t, err)
+			mf := &testutil.MockStater{BeaconState: st}
+			_, err = IsOptimistic(ctx, []byte(hexutil.Encode(bytesutil.PadTo([]byte("root"), 32))), cs, mf, cs, db)
+			var blockRootsNotFoundErr *lookup.BlockRootsNotFoundError
+			require.Equal(t, true, errors.As(err, &blockRootsNotFoundErr))
+		})
 	})
+
 	t.Run("slot", func(t *testing.T) {
 		t.Run("head is not optimistic", func(t *testing.T) {
 			cs := &chainmock.ChainService{Optimistic: false}
@@ -319,6 +383,36 @@ func TestIsOptimistic(t *testing.T) {
 	})
 }
 
+func TestHandleIsOptimisticError(t *testing.T) {
+	t.Run("fetch-state error handled as 404", func(t *testing.T) {
+		rr := httptest.NewRecorder()
+		notFoundErr := lookup.StateNotFoundError{}
+		fetchErr := lookup.NewFetchStateError(&notFoundErr)
+		HandleIsOptimisticError(rr, fetchErr)
+
+		require.Equal(t, http.StatusNotFound, rr.Code)
+		require.StringContains(t, notFoundErr.Error(), rr.Body.String())
+	})
+	t.Run("no block roots error handled as 404", func(t *testing.T) {
+		rr := httptest.NewRecorder()
+		blockRootsErr := lookup.NewBlockRootsNotFoundError()
+		HandleIsOptimisticError(rr, blockRootsErr)
+
+		require.Equal(t, http.StatusNotFound, rr.Code)
+		require.StringContains(t, blockRootsErr.Error(), rr.Body.String())
+	})
+
+	t.Run("generic error handled as 500", func(t *testing.T) {
+		rr := httptest.NewRecorder()
+		genericErr := errors.New("boom")
+
+		HandleIsOptimisticError(rr, genericErr)
+
+		require.Equal(t, http.StatusInternalServerError, rr.Code)
+		require.StringContains(t, "Could not check optimistic status: boom", rr.Body.String())
+	})
+}
+
 // prepareForkchoiceState prepares a beacon state with the given data to mock
 // insert into forkchoice
 func prepareForkchoiceState(

beacon-chain/rpc/eth/light-client/BUILD.bazel

@@ -12,12 +12,10 @@ go_library(
         "//api:go_default_library",
         "//api/server/structs:go_default_library",
         "//beacon-chain/core/light-client:go_default_library",
-        "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/rpc/eth/shared:go_default_library",
         "//config/params:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
-        "//network/forks:go_default_library",
         "//network/httputil:go_default_library",
         "//runtime/version:go_default_library",
         "//time/slots:go_default_library",

beacon-chain/rpc/eth/light-client/handlers.go

@@ -7,12 +7,10 @@ import (
 	"github.com/OffchainLabs/prysm/v6/api"
 	"github.com/OffchainLabs/prysm/v6/api/server/structs"
 	lightclient "github.com/OffchainLabs/prysm/v6/beacon-chain/core/light-client"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/eth/shared"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/network/httputil"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
@@ -111,17 +109,7 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 
 			updateSlot := update.AttestedHeader().Beacon().Slot
 			updateEpoch := slots.ToEpoch(updateSlot)
-			updateFork, err := forks.Fork(updateEpoch)
-			if err != nil {
-				httputil.HandleError(w, "Could not get fork Version: "+err.Error(), http.StatusInternalServerError)
-				return
-			}
-
-			forkDigest, err := signing.ComputeForkDigest(updateFork.CurrentVersion, params.BeaconConfig().GenesisValidatorsRoot[:])
-			if err != nil {
-				httputil.HandleError(w, "Could not compute fork digest: "+err.Error(), http.StatusInternalServerError)
-				return
-			}
+			updateEntry := params.GetNetworkScheduleEntry(updateEpoch)
 			updateSSZ, err := update.MarshalSSZ()
 			if err != nil {
 				httputil.HandleError(w, "Could not marshal update to SSZ: "+err.Error(), http.StatusInternalServerError)
@@ -133,7 +121,7 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 			if _, err := w.Write(chunkLength); err != nil {
 				httputil.HandleError(w, "Could not write chunk length: "+err.Error(), http.StatusInternalServerError)
 			}
-			if _, err := w.Write(forkDigest[:]); err != nil {
+			if _, err := w.Write(updateEntry.ForkDigest[:]); err != nil {
 				httputil.HandleError(w, "Could not write fork digest: "+err.Error(), http.StatusInternalServerError)
 			}
 			if _, err := w.Write(updateSSZ); err != nil {

beacon-chain/rpc/lookup/blocker.go

@@ -23,6 +23,20 @@ import (
 	"github.com/pkg/errors"
 )
 
+type BlockRootsNotFoundError struct {
+	message string
+}
+
+func NewBlockRootsNotFoundError() *BlockRootsNotFoundError {
+	return &BlockRootsNotFoundError{
+		message: "no block roots returned from the database",
+	}
+}
+
+func (e BlockRootsNotFoundError) Error() string {
+	return e.message
+}
+
 // BlockIdParseError represents an error scenario where a block ID could not be parsed.
 type BlockIdParseError struct {
 	message string
@@ -341,7 +355,7 @@ func (p *BeaconDbBlocker) blobsFromStoredDataColumns(block blocks.ROBlock, indic
 	stored := summary.Stored()
 	count := uint64(len(stored))
 
-	if count < peerdas.MinimumColumnsCountToReconstruct() {
+	if count < peerdas.MinimumColumnCountToReconstruct() {
 		// There is no way to reconstruct the data columns.
 		return nil, &core.RpcError{
 			Err:    errors.Errorf("the node does not custody enough data columns to reconstruct blobs - please start the beacon node with the `--%s` flag to ensure this call to succeed, or retry later if it is already the case", flags.SubscribeAllDataSubnets.Name),

beacon-chain/rpc/lookup/blocker_test.go

@@ -443,7 +443,7 @@ func TestGetBlob(t *testing.T) {
 		setupFulu(t)
 
 		_, dataColumnStorage := filesystem.NewEphemeralDataColumnStorageAndFs(t)
-		err = dataColumnStorage.Save(verifiedRoDataColumnSidecars[1 : peerdas.MinimumColumnsCountToReconstruct()+1])
+		err = dataColumnStorage.Save(verifiedRoDataColumnSidecars[1 : peerdas.MinimumColumnCountToReconstruct()+1])
 		require.NoError(t, err)
 
 		blocker := &BeaconDbBlocker{

beacon-chain/rpc/lookup/stater.go

@@ -21,6 +21,27 @@ import (
 	"github.com/pkg/errors"
 )
 
+type FetchStateError struct {
+	message string
+	cause   error
+}
+
+func NewFetchStateError(cause error) *FetchStateError {
+	return &FetchStateError{
+		message: "could not fetch state",
+		cause:   cause,
+	}
+}
+
+func (e *FetchStateError) Error() string {
+	if e.cause != nil {
+		return e.message + ": " + e.cause.Error()
+	}
+	return e.message
+}
+
+func (e *FetchStateError) Unwrap() error { return e.cause }
+
 // StateIdParseError represents an error scenario where a state ID could not be parsed.
 type StateIdParseError struct {
 	message string

beacon-chain/rpc/prysm/beacon/validator_count.go

@@ -56,11 +56,7 @@ func (s *Server) GetValidatorCount(w http.ResponseWriter, r *http.Request) {
 
 	isOptimistic, err := helpers.IsOptimistic(ctx, []byte(stateID), s.OptimisticModeFetcher, s.Stater, s.ChainInfoFetcher, s.BeaconDB)
 	if err != nil {
-		errJson := &httputil.DefaultJsonError{
-			Message: fmt.Sprintf("could not check if slot's block is optimistic: %v", err),
-			Code:    http.StatusInternalServerError,
-		}
-		httputil.WriteError(w, errJson)
+		helpers.HandleIsOptimisticError(w, err)
 		return
 	}