ci fixes

* remove usages of params from proto packages

* make it harder to mess up the order of request limit args

* remove errant edit (Terence review)

* fix missed updates after sig change

---------

Co-authored-by: Kasey Kirkham <kasey@users.noreply.github.com>

WORKSPACE

@@ -253,16 +253,16 @@ filegroup(
     url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )
 
-consensus_spec_version = "v1.6.0-alpha.0"
+consensus_spec_version = "v1.6.0-alpha.1"
 
 load("@prysm//tools:download_spectests.bzl", "consensus_spec_tests")
 
 consensus_spec_tests(
     name = "consensus_spec_tests",
     flavors = {
-        "general": "sha256-W7oKvoM0nAkyitykRxAw6kmCvjYC01IqiNJy0AmCnMM=",
-        "minimal": "sha256-ig7/zxomjv6buBWMom4IxAJh3lFJ9+JnY44E7c8ZNP8=",
-        "mainnet": "sha256-mjx+MkXtPhCNv4c4knLYLIkvIdpF7WTjx/ElvGPQzSo=",
+        "general": "sha256-o4t9p3R+fQHF4KOykGmwlG3zDw5wUdVWprkzId8aIsk=",
+        "minimal": "sha256-sU7ToI8t3MR8x0vVjC8ERmAHZDWpEmnAC9FWIpHi5x4=",
+        "mainnet": "sha256-YKS4wngg0LgI9Upp4MYJ77aG+8+e/G4YeqEIlp06LZw=",
     },
     version = consensus_spec_version,
 )
@@ -278,7 +278,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    integrity = "sha256-u0RkIZIeGttb3sInR31mO64aBSwxALqO5SYIPlqEvPo=",
+    integrity = "sha256-Nv4TEuEJPQIM4E6T9J0FOITsmappmXZjGtlhe1HEXnU=",
     strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
     url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )

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/server/structs/conversions_state.go

@@ -923,7 +923,14 @@ func BeaconStateFuluFromConsensus(st beaconState.BeaconState) (*BeaconStateFulu,
 	if err != nil {
 		return nil, err
 	}
-
+	srcLookahead, err := st.ProposerLookahead()
+	if err != nil {
+		return nil, err
+	}
+	lookahead := make([]string, len(srcLookahead))
+	for i, v := range srcLookahead {
+		lookahead[i] = fmt.Sprintf("%d", uint64(v))
+	}
 	return &BeaconStateFulu{
 		GenesisTime:                   fmt.Sprintf("%d", st.GenesisTime()),
 		GenesisValidatorsRoot:         hexutil.Encode(st.GenesisValidatorsRoot()),
@@ -962,5 +969,6 @@ func BeaconStateFuluFromConsensus(st beaconState.BeaconState) (*BeaconStateFulu,
 		PendingDeposits:               PendingDepositsFromConsensus(pbd),
 		PendingPartialWithdrawals:     PendingPartialWithdrawalsFromConsensus(ppw),
 		PendingConsolidations:         PendingConsolidationsFromConsensus(pc),
+		ProposerLookahead:             lookahead,
 	}, nil
 }

api/server/structs/state.go

@@ -219,4 +219,5 @@ type BeaconStateFulu struct {
 	PendingDeposits               []*PendingDeposit            `json:"pending_deposits"`
 	PendingPartialWithdrawals     []*PendingPartialWithdrawal  `json:"pending_partial_withdrawals"`
 	PendingConsolidations         []*PendingConsolidation      `json:"pending_consolidations"`
+	ProposerLookahead             []string                     `json:"proposer_lookahead"`
 }

beacon-chain/blockchain/process_attestation.go

@@ -5,6 +5,7 @@ import (
 	"time"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
@@ -88,7 +89,7 @@ func (s *Service) OnAttestation(ctx context.Context, a ethpb.Att, disparity time
 	if err != nil {
 		return err
 	}
-	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt); err != nil {
+	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot); err != nil {
 		return err
 	}
 

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/attestation.go

@@ -178,7 +178,7 @@ func VerifyAttestationNoVerifySignature(
 		}
 	}
 
-	return attestation.IsValidAttestationIndices(ctx, indexedAtt)
+	return attestation.IsValidAttestationIndices(ctx, indexedAtt, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot)
 }
 
 // ProcessAttestationNoVerifySignature processes the attestation without verifying the attestation signature. This
@@ -243,7 +243,7 @@ func VerifyIndexedAttestation(ctx context.Context, beaconState state.ReadOnlyBea
 	ctx, span := trace.StartSpan(ctx, "core.VerifyIndexedAttestation")
 	defer span.End()
 
-	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt); err != nil {
+	if err := attestation.IsValidAttestationIndices(ctx, indexedAtt, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot); err != nil {
 		return err
 	}
 	domain, err := signing.Domain(

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"
@@ -98,7 +97,7 @@ func VerifyBlockHeaderSignature(beaconState state.BeaconState, header *ethpb.Sig
 
 func VerifyBlockHeaderSignatureUsingCurrentFork(beaconState state.BeaconState, header *ethpb.SignedBeaconBlockHeader) error {
 	currentEpoch := slots.ToEpoch(header.Header.Slot)
-	fork, err := forks.Fork(currentEpoch)
+	fork, err := params.Fork(currentEpoch)
 	if err != nil {
 		return err
 	}
@@ -119,7 +118,7 @@ func VerifyBlockHeaderSignatureUsingCurrentFork(beaconState state.BeaconState, h
 // 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
 	}
@@ -218,7 +217,7 @@ func createAttestationSignatureBatch(
 		if err != nil {
 			return nil, err
 		}
-		if err := attestation.IsValidAttestationIndices(ctx, ia); err != nil {
+		if err := attestation.IsValidAttestationIndices(ctx, ia, params.BeaconConfig().MaxValidatorsPerCommittee, params.BeaconConfig().MaxCommitteesPerSlot); err != nil {
 			return nil, err
 		}
 		indices := ia.GetAttestingIndices()

beacon-chain/core/fulu/BUILD.bazel

@@ -2,23 +2,33 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "go_default_library",
-    srcs = ["upgrade.go"],
+    srcs = [
+        "transition.go",
+        "upgrade.go",
+    ],
     importpath = "github.com/OffchainLabs/prysm/v6/beacon-chain/core/fulu",
     visibility = ["//visibility:public"],
     deps = [
+        "//beacon-chain/core/electra:go_default_library",
+        "//beacon-chain/core/helpers:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",
         "//config/params:go_default_library",
+        "//monitoring/tracing/trace:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//time/slots:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
     ],
 )
 
 go_test(
     name = "go_default_test",
-    srcs = ["upgrade_test.go"],
+    srcs = [
+        "transition_test.go",
+        "upgrade_test.go",
+    ],
     deps = [
         ":go_default_library",
         "//beacon-chain/core/time:go_default_library",

beacon-chain/core/fulu/transition.go

@@ -0,0 +1,47 @@
+package fulu
+
+import (
+	"context"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/electra"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
+	"github.com/OffchainLabs/prysm/v6/time/slots"
+	"github.com/pkg/errors"
+)
+
+func ProcessEpoch(ctx context.Context, state state.BeaconState) error {
+	if err := electra.ProcessEpoch(ctx, state); err != nil {
+		return errors.Wrap(err, "could not process epoch in fulu transition")
+	}
+	return processProposerLookahead(ctx, state)
+}
+
+func processProposerLookahead(ctx context.Context, state state.BeaconState) error {
+	_, span := trace.StartSpan(ctx, "fulu.processProposerLookahead")
+	defer span.End()
+
+	if state == nil || state.IsNil() {
+		return errors.New("nil state")
+	}
+
+	lookAhead, err := state.ProposerLookahead()
+	if err != nil {
+		return errors.Wrap(err, "could not get proposer lookahead")
+	}
+	lastEpochStart := len(lookAhead) - int(params.BeaconConfig().SlotsPerEpoch)
+	copy(lookAhead[:lastEpochStart], lookAhead[params.BeaconConfig().SlotsPerEpoch:])
+	lastEpoch := slots.ToEpoch(state.Slot()) + params.BeaconConfig().MinSeedLookahead + 1
+	indices, err := helpers.ActiveValidatorIndices(ctx, state, lastEpoch)
+	if err != nil {
+		return err
+	}
+	lastEpochProposers, err := helpers.PrecomputeProposerIndices(state, indices, lastEpoch)
+	if err != nil {
+		return errors.Wrap(err, "could not precompute proposer indices")
+	}
+	copy(lookAhead[lastEpochStart:], lastEpochProposers)
+	return state.SetProposerLookahead(lookAhead)
+}

beacon-chain/core/fulu/transition_test.go

@@ -0,0 +1,28 @@
+package fulu_test
+
+import (
+	"context"
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/fulu"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+	"github.com/OffchainLabs/prysm/v6/testing/util"
+)
+
+func TestProcessEpoch_CanProcessFulu(t *testing.T) {
+	st, _ := util.DeterministicGenesisStateElectra(t, params.BeaconConfig().MaxValidatorsPerCommittee)
+	require.NoError(t, st.SetSlot(10*params.BeaconConfig().SlotsPerEpoch))
+	st, err := fulu.UpgradeToFulu(context.Background(), st)
+	require.NoError(t, err)
+	preLookahead, err := st.ProposerLookahead()
+	require.NoError(t, err)
+	err = fulu.ProcessEpoch(context.Background(), st)
+	require.NoError(t, err)
+	postLookahead, err := st.ProposerLookahead()
+	require.NoError(t, err)
+	require.NotEqual(t, preLookahead[0], postLookahead[0])
+	for i, v := range preLookahead[params.BeaconConfig().SlotsPerEpoch:] {
+		require.Equal(t, v, postLookahead[i])
+	}
+}

beacon-chain/core/fulu/upgrade.go

@@ -1,18 +1,22 @@
 package fulu
 
 import (
+	"context"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/time"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
 	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
 )
 
 // UpgradeToFulu updates inputs a generic state to return the version Fulu state.
 // https://github.com/ethereum/consensus-specs/blob/v1.5.0-beta.5/specs/fulu/fork.md#upgrading-the-state
-func UpgradeToFulu(beaconState state.BeaconState) (state.BeaconState, error) {
+func UpgradeToFulu(ctx context.Context, beaconState state.BeaconState) (state.BeaconState, error) {
 	currentSyncCommittee, err := beaconState.CurrentSyncCommittee()
 	if err != nil {
 		return nil, err
@@ -101,8 +105,12 @@ func UpgradeToFulu(beaconState state.BeaconState) (state.BeaconState, error) {
 	if err != nil {
 		return nil, err
 	}
+	proposerLookahead, err := helpers.InitializeProposerLookahead(ctx, beaconState, slots.ToEpoch(beaconState.Slot()))
+	if err != nil {
+		return nil, err
+	}
 
-	s := &ethpb.BeaconStateElectra{
+	s := &ethpb.BeaconStateFulu{
 		GenesisTime:           beaconState.GenesisTime(),
 		GenesisValidatorsRoot: beaconState.GenesisValidatorsRoot(),
 		Slot:                  beaconState.Slot(),
@@ -163,6 +171,7 @@ func UpgradeToFulu(beaconState state.BeaconState) (state.BeaconState, error) {
 		PendingDeposits:               pendingDeposits,
 		PendingPartialWithdrawals:     pendingPartialWithdrawals,
 		PendingConsolidations:         pendingConsolidations,
+		ProposerLookahead:             proposerLookahead,
 	}
 
 	// Need to cast the beaconState to use in helper functions

beacon-chain/core/fulu/upgrade_test.go

@@ -25,7 +25,7 @@ func TestUpgradeToFulu(t *testing.T) {
 	require.NoError(t, st.SetBalances(bals))
 
 	preForkState := st.Copy()
-	mSt, err := fulu.UpgradeToFulu(st)
+	mSt, err := fulu.UpgradeToFulu(t.Context(), st)
 	require.NoError(t, err)
 
 	require.Equal(t, preForkState.GenesisTime(), mSt.GenesisTime())

beacon-chain/core/helpers/beacon_committee.go

@@ -555,21 +555,31 @@ func UpdateProposerIndicesInCache(ctx context.Context, state state.ReadOnlyBeaco
 	if err != nil {
 		return err
 	}
-	// Skip cache update if the key already exists
-	_, ok := proposerIndicesCache.ProposerIndices(epoch, [32]byte(root))
-	if ok {
-		return nil
-	}
-	indices, err := ActiveValidatorIndices(ctx, state, epoch)
-	if err != nil {
-		return err
-	}
-	proposerIndices, err := PrecomputeProposerIndices(state, indices, epoch)
-	if err != nil {
-		return err
-	}
-	if len(proposerIndices) != int(params.BeaconConfig().SlotsPerEpoch) {
-		return errors.New("invalid proposer length returned from state")
+	var proposerIndices []primitives.ValidatorIndex
+	// use the state if post fulu (EIP-7917)
+	if state.Version() >= version.Fulu {
+		lookAhead, err := state.ProposerLookahead()
+		if err != nil {
+			return errors.Wrap(err, "could not get proposer lookahead")
+		}
+		proposerIndices = lookAhead[:params.BeaconConfig().SlotsPerEpoch]
+	} else {
+		// Skip cache update if the key already exists
+		_, ok := proposerIndicesCache.ProposerIndices(epoch, [32]byte(root))
+		if ok {
+			return nil
+		}
+		indices, err := ActiveValidatorIndices(ctx, state, epoch)
+		if err != nil {
+			return err
+		}
+		proposerIndices, err = PrecomputeProposerIndices(state, indices, epoch)
+		if err != nil {
+			return err
+		}
+		if len(proposerIndices) != int(params.BeaconConfig().SlotsPerEpoch) {
+			return errors.New("invalid proposer length returned from state")
+		}
 	}
 	// This is here to deal with tests only
 	var indicesArray [fieldparams.SlotsPerEpoch]primitives.ValidatorIndex
@@ -656,6 +666,25 @@ func ComputeCommittee(
 	return shuffledList[start:end], nil
 }
 
+// InitializeProposerLookahead computes the list of the proposer indices for the next cou of epochs.
+func InitializeProposerLookahead(ctx context.Context, state state.ReadOnlyBeaconState, epoch primitives.Epoch) ([]uint64, error) {
+	lookAhead := make([]uint64, 0, uint64(params.BeaconConfig().MinSeedLookahead+1)*uint64(params.BeaconConfig().SlotsPerEpoch))
+	indices, err := ActiveValidatorIndices(ctx, state, epoch)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not get active indices")
+	}
+	for i := range params.BeaconConfig().MinSeedLookahead + 1 {
+		proposerIndices, err := PrecomputeProposerIndices(state, indices, epoch+i)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not compute proposer indices")
+		}
+		for _, proposerIndex := range proposerIndices {
+			lookAhead = append(lookAhead, uint64(proposerIndex))
+		}
+	}
+	return lookAhead, nil
+}
+
 // PrecomputeProposerIndices computes proposer indices of the current epoch and returns a list of proposer indices,
 // the index of the list represents the slot number.
 func PrecomputeProposerIndices(state state.ReadOnlyBeaconState, activeIndices []primitives.ValidatorIndex, e primitives.Epoch) ([]primitives.ValidatorIndex, error) {

beacon-chain/core/helpers/validators.go

@@ -299,9 +299,29 @@ func ProposerIndexAtSlotFromCheckpoint(c *forkchoicetypes.Checkpoint, slot primi
 	return proposerIndices[slot%params.BeaconConfig().SlotsPerEpoch], nil
 }
 
+func beaconProposerIndexAtSlotFulu(state state.ReadOnlyBeaconState, slot primitives.Slot) (primitives.ValidatorIndex, error) {
+	e := slots.ToEpoch(slot)
+	stateEpoch := slots.ToEpoch(state.Slot())
+	if e < stateEpoch || e > stateEpoch+1 {
+		return 0, errors.Errorf("slot %d is not in the current epoch %d or the next epoch", slot, stateEpoch)
+	}
+	lookAhead, err := state.ProposerLookahead()
+	if err != nil {
+		return 0, errors.Wrap(err, "could not get proposer lookahead")
+	}
+	if e == stateEpoch {
+		return lookAhead[slot%params.BeaconConfig().SlotsPerEpoch], nil
+	}
+	// The caller is requesting the proposer for the next epoch
+	return lookAhead[slot%params.BeaconConfig().SlotsPerEpoch+params.BeaconConfig().SlotsPerEpoch], nil
+}
+
 // BeaconProposerIndexAtSlot returns proposer index at the given slot from the
 // point of view of the given state as head state
 func BeaconProposerIndexAtSlot(ctx context.Context, state state.ReadOnlyBeaconState, slot primitives.Slot) (primitives.ValidatorIndex, error) {
+	if state.Version() >= version.Fulu {
+		return beaconProposerIndexAtSlotFulu(state, slot)
+	}
 	e := slots.ToEpoch(slot)
 	// The cache uses the state root of the previous epoch - minimum_seed_lookahead last slot as key. (e.g. Starting epoch 1, slot 32, the key would be block root at slot 31)
 	// For simplicity, the node will skip caching of genesis epoch.

beacon-chain/core/helpers/validators_test.go

@@ -1171,3 +1171,29 @@ func TestValidatorMaxEffectiveBalance(t *testing.T) {
 	// Sanity check that MinActivationBalance equals (pre-electra) MaxEffectiveBalance
 	assert.Equal(t, params.BeaconConfig().MinActivationBalance, params.BeaconConfig().MaxEffectiveBalance)
 }
+
+func TestBeaconProposerIndexAtSlotFulu(t *testing.T) {
+	lookahead := make([]uint64, 64)
+	lookahead[0] = 15
+	lookahead[1] = 16
+	lookahead[34] = 42
+	pbState := ethpb.BeaconStateFulu{
+		Slot:              100,
+		ProposerLookahead: lookahead,
+	}
+	st, err := state_native.InitializeFromProtoFulu(&pbState)
+	require.NoError(t, err)
+	idx, err := helpers.BeaconProposerIndexAtSlot(t.Context(), st, 96)
+	require.NoError(t, err)
+	require.Equal(t, primitives.ValidatorIndex(15), idx)
+	idx, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 97)
+	require.NoError(t, err)
+	require.Equal(t, primitives.ValidatorIndex(16), idx)
+	idx, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 130)
+	require.NoError(t, err)
+	require.Equal(t, primitives.ValidatorIndex(42), idx)
+	_, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 95)
+	require.ErrorContains(t, "slot 95 is not in the current epoch 3 or the next epoch", err)
+	_, err = helpers.BeaconProposerIndexAtSlot(t.Context(), st, 160)
+	require.ErrorContains(t, "slot 160 is not in the current epoch 3 or the next epoch", err)
+}

beacon-chain/core/peerdas/validator_test.go

@@ -44,7 +44,7 @@ func TestValidatorsCustodyRequirement(t *testing.T) {
 				validatorsIndex[primitives.ValidatorIndex(i)] = true
 			}
 
-			beaconState, err := state_native.InitializeFromProtoFulu(&ethpb.BeaconStateElectra{Validators: validators})
+			beaconState, err := state_native.InitializeFromProtoFulu(&ethpb.BeaconStateFulu{Validators: validators})
 			require.NoError(t, err)
 
 			actual, err := peerdas.ValidatorsCustodyRequirement(beaconState, validatorsIndex)

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/core/transition/transition.go

@@ -303,7 +303,11 @@ func ProcessSlotsCore(ctx context.Context, span trace.Span, state state.BeaconSt
 func ProcessEpoch(ctx context.Context, state state.BeaconState) (state.BeaconState, error) {
 	var err error
 	if time.CanProcessEpoch(state) {
-		if state.Version() >= version.Electra {
+		if state.Version() >= version.Fulu {
+			if err = fulu.ProcessEpoch(ctx, state); err != nil {
+				return nil, errors.Wrap(err, fmt.Sprintf("could not process %s epoch", version.String(state.Version())))
+			}
+		} else if state.Version() >= version.Electra {
 			if err = electra.ProcessEpoch(ctx, state); err != nil {
 				return nil, errors.Wrap(err, fmt.Sprintf("could not process %s epoch", version.String(state.Version())))
 			}
@@ -377,7 +381,7 @@ func UpgradeState(ctx context.Context, state state.BeaconState) (state.BeaconSta
 	}
 
 	if time.CanUpgradeToFulu(slot) {
-		state, err = fulu.UpgradeToFulu(state)
+		state, err = fulu.UpgradeToFulu(ctx, state)
 		if err != nil {
 			tracing.AnnotateError(span, err)
 			return nil, err

beacon-chain/db/kv/state.go

@@ -518,7 +518,7 @@ func (s *Store) unmarshalState(_ context.Context, enc []byte, validatorEntries [
 
 	switch {
 	case hasFuluKey(enc):
-		protoState := &ethpb.BeaconStateElectra{}
+		protoState := &ethpb.BeaconStateFulu{}
 		if err := protoState.UnmarshalSSZ(enc[len(fuluKey):]); err != nil {
 			return nil, errors.Wrap(err, "failed to unmarshal encoding for Fulu")
 		}
@@ -690,7 +690,7 @@ func marshalState(ctx context.Context, st state.ReadOnlyBeaconState) ([]byte, er
 		}
 		return snappy.Encode(nil, append(ElectraKey, rawObj...)), nil
 	case version.Fulu:
-		rState, ok := st.ToProtoUnsafe().(*ethpb.BeaconStateElectra)
+		rState, ok := st.ToProtoUnsafe().(*ethpb.BeaconStateFulu)
 		if !ok {
 			return nil, errors.New("non valid inner state")
 		}

beacon-chain/p2p/BUILD.bazel

@@ -71,7 +71,6 @@ 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",
@@ -168,7 +167,6 @@ 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",

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"
@@ -279,14 +278,8 @@ 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)
@@ -305,13 +298,7 @@ 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")

beacon-chain/p2p/broadcaster_test.go

@@ -16,12 +16,13 @@ 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/runtime/version"
@@ -61,6 +62,7 @@ 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)
@@ -550,9 +552,7 @@ 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()

beacon-chain/p2p/discovery.go

@@ -2,6 +2,7 @@ package p2p
 
 import (
 	"bytes"
+	"context"
 	"crypto/ecdsa"
 	"net"
 	"sync"
@@ -503,7 +504,11 @@ func (s *Service) createLocalNode(
 	localNode.SetFallbackIP(ipAddr)
 	localNode.SetFallbackUDP(udpPort)
 
-	localNode, err = addForkEntry(localNode, s.genesisTime, s.genesisValidatorsRoot)
+	clock, err := s.cfg.ClockWaiter.WaitForClock(context.Background())
+	if err != nil {
+		return nil, errors.Wrap(err, "timeout waiting for startup clock")
+	}
+	localNode, err = addForkEntry(localNode, clock.CurrentEpoch())
 	if err != nil {
 		return nil, errors.Wrap(err, "could not add eth2 fork version entry to enr")
 	}

beacon-chain/p2p/fork.go

@@ -3,13 +3,10 @@ package p2p
 import (
 	"bytes"
 	"fmt"
-	"time"
 
 	"github.com/OffchainLabs/prysm/v6/config/params"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	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"
 	"github.com/pkg/errors"
@@ -22,10 +19,11 @@ var eth2ENRKey = params.BeaconNetworkConfig().ETH2Key
 // ForkDigest returns the current fork digest of
 // the node according to the local clock.
 func (s *Service) currentForkDigest() ([4]byte, error) {
-	if !s.isInitialized() {
+	if !s.isInitialized() || s.clock == nil {
 		return [4]byte{}, errors.New("state is not initialized")
 	}
-	return forks.CreateForkDigest(s.genesisTime, s.genesisValidatorsRoot)
+
+	return params.ForkDigest(s.clock.CurrentEpoch()), nil
 }
 
 // Compares fork ENRs between an incoming peer's record and our node's
@@ -79,24 +77,9 @@ func (s *Service) compareForkENR(record *enr.Record) error {
 // 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.Since(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 addForkEntry(node *enode.LocalNode, current primitives.Epoch) (*enode.LocalNode, error) {
+	digest := params.ForkDigest(current)
+	nextForkVersion, nextForkEpoch := params.NextForkData(current)
 	enrForkID := &pb.ENRForkID{
 		CurrentForkDigest: digest[:],
 		NextForkVersion:   nextForkVersion[:],

beacon-chain/p2p/fork_test.go

@@ -11,11 +11,11 @@ import (
 
 	mock "github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain/testing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
+	"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/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"
@@ -231,10 +231,8 @@ func TestDiscv5_AddRetrieveForkEntryENR(t *testing.T) {
 	nextForkVersion := []byte{0, 0, 0, 1}
 	params.OverrideBeaconConfig(c)
 
-	genesisTime := time.Now()
-	genesisValidatorsRoot := make([]byte, 32)
-	digest, err := forks.CreateForkDigest(genesisTime, make([]byte, 32))
-	require.NoError(t, err)
+	clock := startup.NewClock(time.Now(), [32]byte{})
+	digest := params.ForkDigest(clock.CurrentEpoch())
 	enrForkID := &pb.ENRForkID{
 		CurrentForkDigest: digest[:],
 		NextForkVersion:   nextForkVersion,
@@ -256,7 +254,7 @@ func TestDiscv5_AddRetrieveForkEntryENR(t *testing.T) {
 	localNode := enode.NewLocalNode(db, pkey)
 	localNode.Set(entry)
 
-	want, err := signing.ComputeForkDigest([]byte{0, 0, 0, 0}, genesisValidatorsRoot)
+	want, err := signing.ComputeForkDigest([]byte{0, 0, 0, 0}, clock.GenesisValidatorsRootSlice())
 	require.NoError(t, err)
 
 	resp, err := forkEntry(localNode.Node().Record())
@@ -283,7 +281,8 @@ func TestAddForkEntry_Genesis(t *testing.T) {
 	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(), bCfg.GenesisValidatorsRoot)
+	localNode, err = addForkEntry(localNode, clock.CurrentEpoch())
 	require.NoError(t, err)
 	forkEntry, err := forkEntry(localNode.Node().Record())
 	require.NoError(t, err)

beacon-chain/p2p/fork_watcher.go

@@ -25,7 +25,10 @@ func (s *Service) forkWatcher() {
 				// 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 s.clock == nil {
+						continue
+					}
+					_, err := addForkEntry(s.dv5Listener.LocalNode(), s.clock.CurrentEpoch())
 					if err != nil {
 						log.WithError(err).Error("Could not add fork entry")
 					}

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"
@@ -18,22 +18,22 @@ 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) {

beacon-chain/p2p/pubsub_filter.go

@@ -6,7 +6,6 @@ import (
 
 	"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"
@@ -53,36 +52,12 @@ func (s *Service) CanSubscribe(topic string) bool {
 		log.WithError(err).Error("Could not determine fork digest")
 		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
-	}
+	altairForkDigest := params.ForkDigest(params.BeaconConfig().AltairForkEpoch)
+	bellatrixForkDigest := params.ForkDigest(params.BeaconConfig().BellatrixForkEpoch)
+	capellaForkDigest := params.ForkDigest(params.BeaconConfig().CapellaForkEpoch)
+	denebForkDigest := params.ForkDigest(params.BeaconConfig().DenebForkEpoch)
+	electraForkDigest := params.ForkDigest(params.BeaconConfig().ElectraForkEpoch)
+	fuluForkDigest := params.ForkDigest(params.BeaconConfig().FuluForkEpoch)
 	switch parts[2] {
 	case fmt.Sprintf("%x", phase0ForkDigest):
 	case fmt.Sprintf("%x", altairForkDigest):

beacon-chain/p2p/pubsub_filter_test.go

@@ -11,8 +11,6 @@ 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"
@@ -23,10 +21,8 @@ func TestService_CanSubscribe(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	currentFork := [4]byte{0x01, 0x02, 0x03, 0x04}
 	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(), [32]byte{})
+	digest := params.ForkDigest(clock.CurrentEpoch())
 	type test struct {
 		name  string
 		topic string
@@ -108,11 +104,12 @@ 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(),
 			}
 			if got := s.CanSubscribe(tt.topic); got != tt.want {
 				t.Errorf("CanSubscribe(%s) = %v, want %v", tt.topic, got, tt.want)
@@ -220,10 +217,8 @@ func TestGossipTopicMapping_scanfcheck_GossipTopicFormattingSanityCheck(t *testi
 func TestService_FilterIncomingSubscriptions(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	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(), [32]byte{})
+	digest := params.ForkDigest(clock.CurrentEpoch())
 	type args struct {
 		id   peer.ID
 		subs []*pubsubpb.RPC_SubOpts
@@ -320,11 +315,12 @@ 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(),
 			}
 			got, err := s.FilterIncomingSubscriptions(tt.args.id, tt.args.subs)
 			if (err != nil) != tt.wantErr {

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"
 	leakybucket "github.com/OffchainLabs/prysm/v6/container/leaky-bucket"
@@ -82,6 +83,7 @@ type Service struct {
 	genesisTime           time.Time
 	genesisValidatorsRoot []byte
 	activeValidatorCount  uint64
+	clock                 *startup.Clock
 }
 
 // NewService initializes a new p2p service compatible with shared.Service interface. No

beacon-chain/p2p/service_test.go

@@ -13,7 +13,6 @@ 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"
@@ -346,14 +345,12 @@ func TestService_JoinLeaveTopic(t *testing.T) {
 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)
+	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())
 }
 
 // TODO: Uncomment when out of devnet

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",
     ],
@@ -24,7 +23,6 @@ go_test(
         "//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

@@ -10,7 +10,6 @@ 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"
 )
@@ -33,34 +32,25 @@ 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

@@ -11,9 +11,6 @@ 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"
@@ -586,43 +583,34 @@ 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)
@@ -633,7 +621,7 @@ 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/BUILD.bazel

@@ -35,6 +35,7 @@ go_test(
         "//beacon-chain/forkchoice/doubly-linked-tree:go_default_library",
         "//beacon-chain/forkchoice/types:go_default_library",
         "//beacon-chain/rpc/testutil:go_default_library",
+        "//config/params:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//runtime/version:go_default_library",
         "//testing/assert:go_default_library",

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

@@ -15,6 +15,7 @@ import (
 	doublylinkedtree "github.com/OffchainLabs/prysm/v6/beacon-chain/forkchoice/doubly-linked-tree"
 	forkchoicetypes "github.com/OffchainLabs/prysm/v6/beacon-chain/forkchoice/types"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/rpc/testutil"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -219,9 +220,10 @@ func TestGetBeaconStateV2(t *testing.T) {
 		resp := &structs.GetBeaconStateV2Response{}
 		require.NoError(t, json.Unmarshal(writer.Body.Bytes(), resp))
 		assert.Equal(t, version.String(version.Fulu), resp.Version)
-		st := &structs.BeaconStateElectra{}
+		st := &structs.BeaconStateFulu{}
 		require.NoError(t, json.Unmarshal(resp.Data, st))
 		assert.Equal(t, "123", st.Slot)
+		assert.Equal(t, int(params.BeaconConfig().MinSeedLookahead+1)*int(params.BeaconConfig().SlotsPerEpoch), len(st.ProposerLookahead))
 	})
 	t.Run("execution optimistic", func(t *testing.T) {
 		parentRoot := [32]byte{'a'}

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

@@ -20,7 +20,6 @@ go_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

@@ -11,7 +11,6 @@ import (
 	"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"
@@ -115,7 +114,7 @@ func (s *Server) GetLightClientUpdatesByRange(w http.ResponseWriter, req *http.R
 
 			updateSlot := update.AttestedHeader().Beacon().Slot
 			updateEpoch := slots.ToEpoch(updateSlot)
-			updateFork, err := forks.Fork(updateEpoch)
+			updateFork, err := params.Fork(updateEpoch)
 			if err != nil {
 				httputil.HandleError(w, "Could not get fork Version: "+err.Error(), http.StatusInternalServerError)
 				return

beacon-chain/rpc/prysm/v1alpha1/validator/BUILD.bazel

@@ -88,7 +88,6 @@ go_library(
         "//math:go_default_library",
         "//monitoring/tracing:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/eth/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",

beacon-chain/rpc/prysm/v1alpha1/validator/proposer_bellatrix.go

@@ -19,7 +19,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/encoding/ssz"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
@@ -220,7 +219,7 @@ func (vs *Server) getPayloadHeaderFromBuilder(
 	if signedBid == nil || signedBid.IsNil() {
 		return nil, errors.New("builder returned nil bid")
 	}
-	fork, err := forks.Fork(slots.ToEpoch(slot))
+	fork, err := params.Fork(slots.ToEpoch(slot))
 	if err != nil {
 		return nil, errors.Wrap(err, "unable to get fork information")
 	}

beacon-chain/rpc/prysm/v1alpha1/validator/server.go

@@ -29,7 +29,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/sync"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"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/OffchainLabs/prysm/v6/runtime/version"
 	"google.golang.org/grpc/codes"
@@ -156,7 +155,7 @@ func (vs *Server) ValidatorIndex(ctx context.Context, req *ethpb.ValidatorIndexR
 //
 // DomainData fetches the current domain version information from the beacon state.
 func (vs *Server) DomainData(ctx context.Context, request *ethpb.DomainRequest) (*ethpb.DomainResponse, error) {
-	fork, err := forks.Fork(request.Epoch)
+	fork, err := params.Fork(request.Epoch)
 	if err != nil {
 		return nil, err
 	}

beacon-chain/startup/clock.go

@@ -35,12 +35,21 @@ func (g *Clock) GenesisValidatorsRoot() [32]byte {
 	return g.vr
 }
 
+// GenesisValidatorsRoot returns the genesis state validator root as a slice for convenience.
+func (g *Clock) GenesisValidatorsRootSlice() []byte {
+	return g.vr[:]
+}
+
 // CurrentSlot returns the current slot relative to the time.Time value that Clock embeds.
 func (g *Clock) CurrentSlot() types.Slot {
 	now := g.now()
 	return slots.Duration(g.t, now)
 }
 
+func (g *Clock) CurrentEpoch() types.Epoch {
+	return slots.ToEpoch(g.CurrentSlot())
+}
+
 // SlotStart computes the time the given slot begins.
 func (g *Clock) SlotStart(slot types.Slot) time.Time {
 	return slots.BeginsAt(slot, g.t)

beacon-chain/state/interfaces.go

@@ -61,6 +61,7 @@ type ReadOnlyBeaconState interface {
 	ReadOnlySyncCommittee
 	ReadOnlyDeposits
 	ReadOnlyConsolidations
+	ReadOnlyProposerLookahead
 	ToProtoUnsafe() interface{}
 	ToProto() interface{}
 	GenesisTime() uint64
@@ -95,6 +96,7 @@ type WriteOnlyBeaconState interface {
 	WriteOnlyConsolidations
 	WriteOnlyWithdrawals
 	WriteOnlyDeposits
+	WriteOnlyProposerLookahead
 	SetGenesisTime(val uint64) error
 	SetGenesisValidatorsRoot(val []byte) error
 	SetSlot(val primitives.Slot) error
@@ -239,6 +241,10 @@ type ReadOnlyConsolidations interface {
 	NumPendingConsolidations() (uint64, error)
 }
 
+type ReadOnlyProposerLookahead interface {
+	ProposerLookahead() ([]primitives.ValidatorIndex, error)
+}
+
 // WriteOnlyBlockRoots defines a struct which only has write access to block roots methods.
 type WriteOnlyBlockRoots interface {
 	SetBlockRoots(val [][]byte) error
@@ -340,3 +346,7 @@ type WriteOnlyDeposits interface {
 	SetPendingDeposits(val []*ethpb.PendingDeposit) error
 	SetDepositBalanceToConsume(primitives.Gwei) error
 }
+
+type WriteOnlyProposerLookahead interface {
+	SetProposerLookahead([]primitives.ValidatorIndex) error
+}

beacon-chain/state/state-native/BUILD.bazel

@@ -17,6 +17,7 @@ go_library(
         "getters_misc.go",
         "getters_participation.go",
         "getters_payload_header.go",
+        "getters_proposer_lookahead.go",
         "getters_randao.go",
         "getters_state.go",
         "getters_sync_committee.go",
@@ -37,6 +38,7 @@ go_library(
         "setters_misc.go",
         "setters_participation.go",
         "setters_payload_header.go",
+        "setters_proposer_lookahead.go",
         "setters_randao.go",
         "setters_state.go",
         "setters_sync_committee.go",
@@ -97,6 +99,7 @@ go_test(
         "getters_deposits_test.go",
         "getters_exit_test.go",
         "getters_participation_test.go",
+        "getters_setters_lookahead_test.go",
         "getters_test.go",
         "getters_validator_test.go",
         "getters_withdrawal_test.go",

beacon-chain/state/state-native/README.md

@@ -3,7 +3,7 @@
 Note: Whenever only the name of a file is provided, it's assumed to be in the `/beacon-chain/state/state-native` package.
 
 - Add a `BeaconState[Version]FieldCount` configuration item to `/config/params/config.go` and set it in `/config/params/mainnet_config.go`.
-- Add the field to the `BeaconState` struct in `beacon_state_mainnet.go` and `beacon_state_minimal.go`. Update the marshaling code too.
+- Add the field to the `BeaconState` struct in `beacon_state.go`. Update the marshaling structs in the same file too.
 - Add the field's metadata to `/beacon-chain/state/state-native/types/types.go`.
 - Add a getter and a setter for the field, either to existing `getter_XXX.go`/`setter_XXX.go` files or create new ones if the field doesn't fit anywhere.
 Add the new getter and setter to `/beacon-chain/state/interfaces.go`.
@@ -19,6 +19,6 @@ between states.
   - Add the following functions: `InitializeFromProto[Version]()`, `InitializeFromProtoUnsafe[Version]()`.
   - Update the following functions: `Copy()`, `initializeMerkleLayers()`, `RecordStateMetrics()` (applies only to multi-value slice fields), `rootSelector()`,
 `finalizerCleanup()` (applies only to multi-value slice fields).
-- If the field is a slice, add it to the field map in `types.go`.
+- If the field is a slice, add it to the field map in `types.go`. This only applies to large slices that need to be rehashed only in part. In particular, this mostly applies for arrays of objects, and not for arrays of basic SSZ types as these are not hashed by taking the root of each element. 
 - If the field is a slice, update the `fieldConverters()` function in `/beacon-chain/state/fieldtrie/field_trie_helpers.go`. The exact implementation will vary
-depending on a few factors (is the field similar to an existing one, is it a multi-value slice etc.)
+depending on a few factors (is the field similar to an existing one, is it a multi-value slice etc). This applies only for the slices as mentioned in the previous comment. 

beacon-chain/state/state-native/beacon_state.go

@@ -70,6 +70,7 @@ type BeaconState struct {
 	pendingDeposits               []*ethpb.PendingDeposit           // pending_deposits: List[PendingDeposit, PENDING_DEPOSITS_LIMIT]
 	pendingPartialWithdrawals     []*ethpb.PendingPartialWithdrawal // pending_partial_withdrawals: List[PartialWithdrawal, PENDING_PARTIAL_WITHDRAWALS_LIMIT]
 	pendingConsolidations         []*ethpb.PendingConsolidation     // pending_consolidations: List[PendingConsolidation, PENDING_CONSOLIDATIONS_LIMIT]
+	proposerLookahead             []primitives.ValidatorIndex       // proposer_look_ahead: List[uint64, (MIN_LOOKAHEAD + 1)*SLOTS_PER_EPOCH]
 
 	id                    uint64
 	lock                  sync.RWMutex
@@ -125,6 +126,7 @@ type beaconStateMarshalable struct {
 	PendingDeposits                     []*ethpb.PendingDeposit                 `json:"pending_deposits" yaml:"pending_deposits"`
 	PendingPartialWithdrawals           []*ethpb.PendingPartialWithdrawal       `json:"pending_partial_withdrawals" yaml:"pending_partial_withdrawals"`
 	PendingConsolidations               []*ethpb.PendingConsolidation           `json:"pending_consolidations" yaml:"pending_consolidations"`
+	ProposerLookahead                   []primitives.ValidatorIndex             `json:"proposer_look_ahead" yaml:"proposer_look_ahead"`
 }
 
 func (b *BeaconState) MarshalJSON() ([]byte, error) {
@@ -194,6 +196,7 @@ func (b *BeaconState) MarshalJSON() ([]byte, error) {
 		PendingDeposits:                     b.pendingDeposits,
 		PendingPartialWithdrawals:           b.pendingPartialWithdrawals,
 		PendingConsolidations:               b.pendingConsolidations,
+		ProposerLookahead:                   b.proposerLookahead,
 	}
 	return json.Marshal(marshalable)
 }

beacon-chain/state/state-native/getters_proposer_lookahead.go

@@ -0,0 +1,19 @@
+package state_native
+
+import (
+	"slices"
+
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/runtime/version"
+)
+
+// ProposerLookahead is a non-mutating call to the beacon state which returns a slice of
+// validator indices that hold the  proposers in the next few slots.
+func (b *BeaconState) ProposerLookahead() ([]primitives.ValidatorIndex, error) {
+	if b.version < version.Fulu {
+		return nil, errNotSupported("ProposerLookahead", b.version)
+	}
+	b.lock.RLock()
+	defer b.lock.RUnlock()
+	return slices.Clone(b.proposerLookahead), nil
+}

beacon-chain/state/state-native/getters_setters_lookahead_test.go

@@ -0,0 +1,44 @@
+package state_native_test
+
+import (
+	"testing"
+
+	state_native "github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+)
+
+func TestProposerLookahead(t *testing.T) {
+	t.Run("Fulu expected values", func(t *testing.T) {
+		lookahead := make([]uint64, int(params.BeaconConfig().MinSeedLookahead+1)*int(params.BeaconConfig().SlotsPerEpoch))
+		want := make([]primitives.ValidatorIndex, int(params.BeaconConfig().MinSeedLookahead+1)*int(params.BeaconConfig().SlotsPerEpoch))
+		st, err := state_native.InitializeFromProtoFulu(&ethpb.BeaconStateFulu{
+			ProposerLookahead: lookahead,
+		})
+		require.NoError(t, err)
+		got, err := st.ProposerLookahead()
+		require.NoError(t, err)
+		require.Equal(t, len(want), len(got))
+		for i, w := range want {
+			require.Equal(t, w, got[i], "index %d", i)
+		}
+	})
+
+	t.Run("Fulu error on invalid size", func(t *testing.T) {
+		lookahead := make([]primitives.ValidatorIndex, int(params.BeaconConfig().MinSeedLookahead+1)*int(params.BeaconConfig().SlotsPerEpoch)+1)
+		st, err := state_native.InitializeFromProtoFulu(&ethpb.BeaconStateFulu{})
+		require.NoError(t, err)
+		require.ErrorContains(t, "invalid size for proposer lookahead", st.SetProposerLookahead(lookahead))
+	})
+
+	t.Run("earlier than electra returns error", func(t *testing.T) {
+		st, err := state_native.InitializeFromProtoDeneb(&ethpb.BeaconStateDeneb{})
+		require.NoError(t, err)
+		_, err = st.ProposerLookahead()
+		require.ErrorContains(t, "is not supported", err)
+		lookahead := make([]primitives.ValidatorIndex, int(params.BeaconConfig().MinSeedLookahead+1)*int(params.BeaconConfig().SlotsPerEpoch))
+		require.ErrorContains(t, "is not supported", st.SetProposerLookahead(lookahead))
+	})
+}

beacon-chain/state/state-native/getters_state.go

@@ -182,7 +182,7 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			NextWithdrawalValidatorIndex: b.nextWithdrawalValidatorIndex,
 			HistoricalSummaries:          b.historicalSummaries,
 		}
-	case version.Electra, version.Fulu:
+	case version.Electra:
 		return &ethpb.BeaconStateElectra{
 			GenesisTime:                   b.genesisTime,
 			GenesisValidatorsRoot:         gvrCopy[:],
@@ -222,6 +222,51 @@ func (b *BeaconState) ToProtoUnsafe() interface{} {
 			PendingPartialWithdrawals:     b.pendingPartialWithdrawals,
 			PendingConsolidations:         b.pendingConsolidations,
 		}
+	case version.Fulu:
+		lookahead := make([]uint64, len(b.proposerLookahead))
+		for i, v := range b.proposerLookahead {
+			lookahead[i] = uint64(v)
+		}
+		return &ethpb.BeaconStateFulu{
+			GenesisTime:                   b.genesisTime,
+			GenesisValidatorsRoot:         gvrCopy[:],
+			Slot:                          b.slot,
+			Fork:                          b.fork,
+			LatestBlockHeader:             b.latestBlockHeader,
+			BlockRoots:                    br,
+			StateRoots:                    sr,
+			HistoricalRoots:               b.historicalRoots.Slice(),
+			Eth1Data:                      b.eth1Data,
+			Eth1DataVotes:                 b.eth1DataVotes,
+			Eth1DepositIndex:              b.eth1DepositIndex,
+			Validators:                    vals,
+			Balances:                      bals,
+			RandaoMixes:                   rm,
+			Slashings:                     b.slashings,
+			PreviousEpochParticipation:    b.previousEpochParticipation,
+			CurrentEpochParticipation:     b.currentEpochParticipation,
+			JustificationBits:             b.justificationBits,
+			PreviousJustifiedCheckpoint:   b.previousJustifiedCheckpoint,
+			CurrentJustifiedCheckpoint:    b.currentJustifiedCheckpoint,
+			FinalizedCheckpoint:           b.finalizedCheckpoint,
+			InactivityScores:              inactivityScores,
+			CurrentSyncCommittee:          b.currentSyncCommittee,
+			NextSyncCommittee:             b.nextSyncCommittee,
+			LatestExecutionPayloadHeader:  b.latestExecutionPayloadHeaderDeneb,
+			NextWithdrawalIndex:           b.nextWithdrawalIndex,
+			NextWithdrawalValidatorIndex:  b.nextWithdrawalValidatorIndex,
+			HistoricalSummaries:           b.historicalSummaries,
+			DepositRequestsStartIndex:     b.depositRequestsStartIndex,
+			DepositBalanceToConsume:       b.depositBalanceToConsume,
+			ExitBalanceToConsume:          b.exitBalanceToConsume,
+			EarliestExitEpoch:             b.earliestExitEpoch,
+			ConsolidationBalanceToConsume: b.consolidationBalanceToConsume,
+			EarliestConsolidationEpoch:    b.earliestConsolidationEpoch,
+			PendingDeposits:               b.pendingDeposits,
+			PendingPartialWithdrawals:     b.pendingPartialWithdrawals,
+			PendingConsolidations:         b.pendingConsolidations,
+			ProposerLookahead:             lookahead,
+		}
 	default:
 		return nil
 	}
@@ -388,7 +433,7 @@ func (b *BeaconState) ToProto() interface{} {
 			NextWithdrawalValidatorIndex: b.nextWithdrawalValidatorIndex,
 			HistoricalSummaries:          b.historicalSummariesVal(),
 		}
-	case version.Electra, version.Fulu:
+	case version.Electra:
 		return &ethpb.BeaconStateElectra{
 			GenesisTime:                   b.genesisTime,
 			GenesisValidatorsRoot:         gvrCopy[:],
@@ -428,6 +473,51 @@ func (b *BeaconState) ToProto() interface{} {
 			PendingPartialWithdrawals:     b.pendingPartialWithdrawalsVal(),
 			PendingConsolidations:         b.pendingConsolidationsVal(),
 		}
+	case version.Fulu:
+		lookahead := make([]uint64, len(b.proposerLookahead))
+		for i, v := range b.proposerLookahead {
+			lookahead[i] = uint64(v)
+		}
+		return &ethpb.BeaconStateFulu{
+			GenesisTime:                   b.genesisTime,
+			GenesisValidatorsRoot:         gvrCopy[:],
+			Slot:                          b.slot,
+			Fork:                          b.forkVal(),
+			LatestBlockHeader:             b.latestBlockHeaderVal(),
+			BlockRoots:                    br,
+			StateRoots:                    sr,
+			HistoricalRoots:               b.historicalRoots.Slice(),
+			Eth1Data:                      b.eth1DataVal(),
+			Eth1DataVotes:                 b.eth1DataVotesVal(),
+			Eth1DepositIndex:              b.eth1DepositIndex,
+			Validators:                    b.validatorsVal(),
+			Balances:                      b.balancesVal(),
+			RandaoMixes:                   rm,
+			Slashings:                     b.slashingsVal(),
+			PreviousEpochParticipation:    b.previousEpochParticipationVal(),
+			CurrentEpochParticipation:     b.currentEpochParticipationVal(),
+			JustificationBits:             b.justificationBitsVal(),
+			PreviousJustifiedCheckpoint:   b.previousJustifiedCheckpointVal(),
+			CurrentJustifiedCheckpoint:    b.currentJustifiedCheckpointVal(),
+			FinalizedCheckpoint:           b.finalizedCheckpointVal(),
+			InactivityScores:              b.inactivityScoresVal(),
+			CurrentSyncCommittee:          b.currentSyncCommitteeVal(),
+			NextSyncCommittee:             b.nextSyncCommitteeVal(),
+			LatestExecutionPayloadHeader:  b.latestExecutionPayloadHeaderDeneb.Copy(),
+			NextWithdrawalIndex:           b.nextWithdrawalIndex,
+			NextWithdrawalValidatorIndex:  b.nextWithdrawalValidatorIndex,
+			HistoricalSummaries:           b.historicalSummariesVal(),
+			DepositRequestsStartIndex:     b.depositRequestsStartIndex,
+			DepositBalanceToConsume:       b.depositBalanceToConsume,
+			ExitBalanceToConsume:          b.exitBalanceToConsume,
+			EarliestExitEpoch:             b.earliestExitEpoch,
+			ConsolidationBalanceToConsume: b.consolidationBalanceToConsume,
+			EarliestConsolidationEpoch:    b.earliestConsolidationEpoch,
+			PendingDeposits:               b.pendingDepositsVal(),
+			PendingPartialWithdrawals:     b.pendingPartialWithdrawalsVal(),
+			PendingConsolidations:         b.pendingConsolidationsVal(),
+			ProposerLookahead:             lookahead,
+		}
 	default:
 		return nil
 	}
@@ -554,4 +644,12 @@ func ProtobufBeaconStateElectra(s interface{}) (*ethpb.BeaconStateElectra, error
 	return pbState, nil
 }
 
-var ProtobufBeaconStateFulu = ProtobufBeaconStateElectra
+// ProtobufBeaconStateFulu transforms an input into beacon state Fulu in the form of protobuf.
+// Error is returned if the input is not type protobuf beacon state.
+func ProtobufBeaconStateFulu(s interface{}) (*ethpb.BeaconStateFulu, error) {
+	pbState, ok := s.(*ethpb.BeaconStateFulu)
+	if !ok {
+		return nil, errors.New("input is not type pb.BeaconStateFulu")
+	}
+	return pbState, nil
+}

beacon-chain/state/state-native/hasher.go

@@ -320,5 +320,13 @@ func ComputeFieldRootsWithHasher(ctx context.Context, state *BeaconState) ([][]b
 		fieldRoots[types.PendingConsolidations.RealPosition()] = pcRoot[:]
 	}
 
+	if state.version >= version.Fulu {
+		// Proposer lookahead root.
+		proposerLookaheadRoot, err := stateutil.ProposerLookaheadRoot(state.proposerLookahead)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not compute proposer lookahead merkleization")
+		}
+		fieldRoots[types.ProposerLookahead.RealPosition()] = proposerLookaheadRoot[:]
+	}
 	return fieldRoots, nil
 }

beacon-chain/state/state-native/setters_proposer_lookahead.go

@@ -0,0 +1,30 @@
+package state_native
+
+import (
+	"errors"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/state-native/types"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/stateutil"
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/runtime/version"
+)
+
+// SetProposerLookahead is a mutating call to the beacon state which sets the proposer lookahead
+func (b *BeaconState) SetProposerLookahead(lookahead []primitives.ValidatorIndex) error {
+	if b.version < version.Fulu {
+		return errNotSupported("SetProposerLookahead", b.version)
+	}
+	if len(lookahead) != int((params.BeaconConfig().MinSeedLookahead+1))*int(params.BeaconConfig().SlotsPerEpoch) {
+		return errors.New("invalid size for proposer lookahead")
+	}
+	b.lock.Lock()
+	defer b.lock.Unlock()
+	b.sharedFieldReferences[types.ProposerLookahead].MinusRef()
+	b.sharedFieldReferences[types.ProposerLookahead] = stateutil.NewRef(1)
+
+	b.proposerLookahead = lookahead
+
+	b.markFieldAsDirty(types.ProposerLookahead)
+	return nil
+}

beacon-chain/state/state-native/state_trie.go

@@ -14,6 +14,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/config/features"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	mvslice "github.com/OffchainLabs/prysm/v6/container/multi-value-slice"
 	"github.com/OffchainLabs/prysm/v6/container/slice"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
@@ -108,7 +109,10 @@ var (
 		types.PendingConsolidations,
 	)
 
-	fuluFields = electraFields
+	fuluFields = append(
+		electraFields,
+		types.ProposerLookahead,
+	)
 )
 
 const (
@@ -118,14 +122,14 @@ const (
 	capellaSharedFieldRefCount                    = 13
 	denebSharedFieldRefCount                      = 13
 	electraSharedFieldRefCount                    = 16
-	fuluSharedFieldRefCount                       = 16
+	fuluSharedFieldRefCount                       = 17
 	experimentalStatePhase0SharedFieldRefCount    = 5
 	experimentalStateAltairSharedFieldRefCount    = 5
 	experimentalStateBellatrixSharedFieldRefCount = 6
 	experimentalStateCapellaSharedFieldRefCount   = 7
 	experimentalStateDenebSharedFieldRefCount     = 7
 	experimentalStateElectraSharedFieldRefCount   = 10
-	experimentalStateFuluSharedFieldRefCount      = 10
+	experimentalStateFuluSharedFieldRefCount      = 11
 )
 
 // InitializeFromProtoPhase0 the beacon state from a protobuf representation.
@@ -159,8 +163,8 @@ func InitializeFromProtoElectra(st *ethpb.BeaconStateElectra) (state.BeaconState
 }
 
 // InitializeFromProtoFulu the beacon state from a protobuf representation.
-func InitializeFromProtoFulu(st *ethpb.BeaconStateElectra) (state.BeaconState, error) {
-	return InitializeFromProtoUnsafeFulu(proto.Clone(st).(*ethpb.BeaconStateElectra))
+func InitializeFromProtoFulu(st *ethpb.BeaconStateFulu) (state.BeaconState, error) {
+	return InitializeFromProtoUnsafeFulu(proto.Clone(st).(*ethpb.BeaconStateFulu))
 }
 
 // InitializeFromProtoUnsafePhase0 directly uses the beacon state protobuf fields
@@ -842,7 +846,7 @@ func InitializeFromProtoUnsafeElectra(st *ethpb.BeaconStateElectra) (state.Beaco
 
 // InitializeFromProtoUnsafeFulu directly uses the beacon state protobuf fields
 // and sets them as fields of the BeaconState type.
-func InitializeFromProtoUnsafeFulu(st *ethpb.BeaconStateElectra) (state.BeaconState, error) {
+func InitializeFromProtoUnsafeFulu(st *ethpb.BeaconStateFulu) (state.BeaconState, error) {
 	if st == nil {
 		return nil, errors.New("received nil state")
 	}
@@ -852,6 +856,10 @@ func InitializeFromProtoUnsafeFulu(st *ethpb.BeaconStateElectra) (state.BeaconSt
 		hRoots[i] = bytesutil.ToBytes32(r)
 	}
 
+	proposerLookahead := make([]primitives.ValidatorIndex, len(st.ProposerLookahead))
+	for i, v := range st.ProposerLookahead {
+		proposerLookahead[i] = primitives.ValidatorIndex(v)
+	}
 	fieldCount := params.BeaconConfig().BeaconStateFuluFieldCount
 	b := &BeaconState{
 		version:                           version.Fulu,
@@ -886,6 +894,7 @@ func InitializeFromProtoUnsafeFulu(st *ethpb.BeaconStateElectra) (state.BeaconSt
 		pendingDeposits:                   st.PendingDeposits,
 		pendingPartialWithdrawals:         st.PendingPartialWithdrawals,
 		pendingConsolidations:             st.PendingConsolidations,
+		proposerLookahead:                 proposerLookahead,
 
 		dirtyFields:      make(map[types.FieldIndex]bool, fieldCount),
 		dirtyIndices:     make(map[types.FieldIndex][]uint64, fieldCount),
@@ -950,6 +959,7 @@ func InitializeFromProtoUnsafeFulu(st *ethpb.BeaconStateElectra) (state.BeaconSt
 	b.sharedFieldReferences[types.PendingDeposits] = stateutil.NewRef(1)
 	b.sharedFieldReferences[types.PendingPartialWithdrawals] = stateutil.NewRef(1)
 	b.sharedFieldReferences[types.PendingConsolidations] = stateutil.NewRef(1)
+	b.sharedFieldReferences[types.ProposerLookahead] = stateutil.NewRef(1) // New in Fulu.
 	if !features.Get().EnableExperimentalState {
 		b.sharedFieldReferences[types.BlockRoots] = stateutil.NewRef(1)
 		b.sharedFieldReferences[types.StateRoots] = stateutil.NewRef(1)
@@ -1015,6 +1025,7 @@ func (b *BeaconState) Copy() state.BeaconState {
 		currentEpochAttestations:  b.currentEpochAttestations,
 		eth1DataVotes:             b.eth1DataVotes,
 		slashings:                 b.slashings,
+		proposerLookahead:         b.proposerLookahead,
 
 		// Large arrays, increases over time.
 		balances:                   b.balances,
@@ -1441,6 +1452,8 @@ func (b *BeaconState) rootSelector(ctx context.Context, field types.FieldIndex)
 		return stateutil.PendingPartialWithdrawalsRoot(b.pendingPartialWithdrawals)
 	case types.PendingConsolidations:
 		return stateutil.PendingConsolidationsRoot(b.pendingConsolidations)
+	case types.ProposerLookahead:
+		return stateutil.ProposerLookaheadRoot(b.proposerLookahead)
 	}
 	return [32]byte{}, errors.New("invalid field index provided")
 }

beacon-chain/state/state-native/types/types.go

@@ -112,6 +112,8 @@ func (f FieldIndex) String() string {
 		return "pendingPartialWithdrawals"
 	case PendingConsolidations:
 		return "pendingConsolidations"
+	case ProposerLookahead:
+		return "proposerLookahead"
 	default:
 		return fmt.Sprintf("unknown field index number: %d", f)
 	}
@@ -195,6 +197,8 @@ func (f FieldIndex) RealPosition() int {
 		return 35
 	case PendingConsolidations:
 		return 36
+	case ProposerLookahead:
+		return 37
 	default:
 		return -1
 	}
@@ -259,6 +263,7 @@ const (
 	PendingDeposits               // Electra: EIP-7251
 	PendingPartialWithdrawals     // Electra: EIP-7251
 	PendingConsolidations         // Electra: EIP-7251
+	ProposerLookahead             // Fulu: EIP-7917
 )
 
 // Enumerator keeps track of the number of states created since the node's start.

beacon-chain/state/stateutil/BUILD.bazel

@@ -15,6 +15,7 @@ go_library(
         "pending_consolidations_root.go",
         "pending_deposits_root.go",
         "pending_partial_withdrawals_root.go",
+        "proposer_lookahead_root.go",
         "reference.go",
         "sync_committee.root.go",
         "trie_helpers.go",
@@ -49,6 +50,7 @@ go_test(
         "benchmark_test.go",
         "field_root_test.go",
         "field_root_validator_test.go",
+        "proposer_lookahead_root_test.go",
         "reference_bench_test.go",
         "state_root_test.go",
         "trie_helpers_test.go",

beacon-chain/state/stateutil/proposer_lookahead_root.go

@@ -0,0 +1,18 @@
+package stateutil
+
+import (
+	"encoding/binary"
+
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/encoding/ssz"
+)
+
+// ProposerLookaheadRoot computes the hash tree root of the proposer lookahead
+func ProposerLookaheadRoot(lookahead []primitives.ValidatorIndex) ([32]byte, error) {
+	chunks := make([][32]byte, (len(lookahead)*8+31)/32)
+	for i, idx := range lookahead {
+		j := i / 4
+		binary.LittleEndian.PutUint64(chunks[j][(i%4)*8:], uint64(idx))
+	}
+	return ssz.MerkleizeVector(chunks, uint64(len(chunks))), nil
+}

beacon-chain/state/stateutil/proposer_lookahead_root_test.go

@@ -0,0 +1,17 @@
+package stateutil_test
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/state/stateutil"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+)
+
+func TestProposerLookaheadRoot(t *testing.T) {
+	lookahead := make([]primitives.ValidatorIndex, 64)
+	root, err := stateutil.ProposerLookaheadRoot(lookahead)
+	require.NoError(t, err)
+	expected := [32]byte{83, 109, 152, 131, 127, 45, 209, 101, 165, 93, 94, 234, 233, 20, 133, 149, 68, 114, 213, 111, 36, 109, 242, 86, 191, 60, 174, 25, 53, 42, 18, 60}
+	require.Equal(t, expected, root)
+}

beacon-chain/sync/BUILD.bazel

@@ -128,7 +128,6 @@ go_library(
         "//math:go_default_library",
         "//monitoring/tracing:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/attestation:go_default_library",
         "//proto/prysm/v1alpha1/metadata:go_default_library",
@@ -267,7 +266,6 @@ go_test(
         "//crypto/rand:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//encoding/ssz/equality: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/sync/backfill/BUILD.bazel

@@ -35,7 +35,6 @@ go_library(
         "//consensus-types/primitives:go_default_library",
         "//crypto/bls:go_default_library",
         "//encoding/bytesutil:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/dbval:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//runtime:go_default_library",
@@ -80,7 +79,6 @@ go_test(
         "//consensus-types/primitives:go_default_library",
         "//crypto/bls:go_default_library",
         "//encoding/bytesutil:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/dbval:go_default_library",
         "//runtime/interop:go_default_library",
         "//testing/require:go_default_library",

beacon-chain/sync/backfill/verify.go

@@ -9,7 +9,6 @@ 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/network/forks"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/pkg/errors"
@@ -107,8 +106,7 @@ func (vr verifier) blockSignatureBatch(b blocks.ROBlock) (*bls.SignatureBatch, e
 }
 
 func newBackfillVerifier(vr []byte, keys [][fieldparams.BLSPubkeyLength]byte) (*verifier, error) {
-	dc, err := newDomainCache(vr, params.BeaconConfig().DomainBeaconProposer,
-		forks.NewOrderedSchedule(params.BeaconConfig()))
+	dc, err := newDomainCache(vr, params.BeaconConfig().DomainBeaconProposer)
 	if err != nil {
 		return nil, err
 	}
@@ -122,33 +120,31 @@ func newBackfillVerifier(vr []byte, keys [][fieldparams.BLSPubkeyLength]byte) (*
 
 // domainCache provides a fast signing domain lookup by epoch.
 type domainCache struct {
-	fsched      forks.OrderedSchedule
 	forkDomains map[[4]byte][]byte
 	dType       [bls.DomainByteLength]byte
 }
 
-func newDomainCache(vRoot []byte, dType [bls.DomainByteLength]byte, fsched forks.OrderedSchedule) (*domainCache, error) {
+func newDomainCache(vRoot []byte, dType [bls.DomainByteLength]byte) (*domainCache, error) {
 	dc := &domainCache{
-		fsched:      fsched,
 		forkDomains: make(map[[4]byte][]byte),
 		dType:       dType,
 	}
-	for _, entry := range fsched {
-		d, err := signing.ComputeDomain(dc.dType, entry.Version[:], vRoot)
+	for _, entry := range params.SortedForkSchedule() {
+		d, err := signing.ComputeDomain(dc.dType, entry.ForkVersion[:], vRoot)
 		if err != nil {
-			return nil, errors.Wrapf(err, "failed to pre-compute signing domain for fork version=%#x", entry.Version)
+			return nil, errors.Wrapf(err, "failed to pre-compute signing domain for fork version=%#x", entry.ForkVersion)
 		}
-		dc.forkDomains[entry.Version] = d
+		dc.forkDomains[entry.ForkVersion] = d
 	}
 	return dc, nil
 }
 
 func (dc *domainCache) forEpoch(e primitives.Epoch) ([]byte, error) {
-	fork, err := dc.fsched.VersionForEpoch(e)
+	fork, err := params.Fork(e)
 	if err != nil {
 		return nil, err
 	}
-	d, ok := dc.forkDomains[fork]
+	d, ok := dc.forkDomains[[4]byte(fork.CurrentVersion)]
 	if !ok {
 		return nil, errors.Wrapf(errUnknownDomain, "fork version=%#x, epoch=%d", fork, e)
 	}

beacon-chain/sync/backfill/verify_test.go

@@ -12,7 +12,6 @@ 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/network/forks"
 	"github.com/OffchainLabs/prysm/v6/runtime/interop"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
@@ -30,18 +29,17 @@ func TestDomainCache(t *testing.T) {
 	}
 
 	vRoot, err := hexutil.Decode("0x0011223344556677889900112233445566778899001122334455667788990011")
+	require.NoError(t, err)
 	dType := cfg.DomainBeaconProposer
-	require.NoError(t, err)
 	require.Equal(t, 32, len(vRoot))
-	fsched := forks.NewOrderedSchedule(cfg)
-	dc, err := newDomainCache(vRoot, dType, fsched)
+	dc, err := newDomainCache(vRoot, dType)
 	require.NoError(t, err)
-	require.Equal(t, len(fsched), len(dc.forkDomains))
-	for i := range fsched {
-		e := fsched[i].Epoch
-		ad, err := dc.forEpoch(e)
+	schedule := params.SortedForkSchedule()
+	require.Equal(t, len(schedule), len(dc.forkDomains))
+	for _, entry := range schedule {
+		ad, err := dc.forEpoch(entry.Epoch)
 		require.NoError(t, err)
-		ed, err := signing.ComputeDomain(dType, fsched[i].Version[:], vRoot)
+		ed, err := signing.ComputeDomain(dType, entry.ForkVersion[:], vRoot)
 		require.NoError(t, err)
 		require.DeepEqual(t, ed, ad)
 	}

beacon-chain/sync/blobs_test.go

@@ -22,7 +22,6 @@ import (
 	types "github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	leakybucket "github.com/OffchainLabs/prysm/v6/container/leaky-bucket"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -157,11 +156,7 @@ func (r *expectedBlobChunk) requireExpected(t *testing.T, s *Service, stream net
 
 	c, err := readContextFromStream(stream)
 	require.NoError(t, err)
-
-	valRoot := s.cfg.chain.GenesisValidatorsRoot()
-	ctxBytes, err := forks.ForkDigestFromEpoch(slots.ToEpoch(r.sidecar.Slot()), valRoot[:])
-	require.NoError(t, err)
-	require.Equal(t, ctxBytes, bytesutil.ToBytes4(c))
+	require.Equal(t, params.ForkDigest(slots.ToEpoch(r.sidecar.Slot())), bytesutil.ToBytes4(c))
 
 	sc := &ethpb.BlobSidecar{}
 	require.NoError(t, encoding.DecodeWithMaxLength(stream, sc))
@@ -281,7 +276,7 @@ func repositionFutureEpochs(cfg *params.BeaconChainConfig) {
 
 func defaultMockChain(t *testing.T, currentSlot uint64) (*mock.ChainService, *startup.Clock) {
 	de := params.BeaconConfig().DenebForkEpoch
-	df, err := forks.Fork(de)
+	df, err := params.Fork(de)
 	require.NoError(t, err)
 	denebBuffer := params.BeaconConfig().MinEpochsForBlobsSidecarsRequest + 1000
 	ce := de + denebBuffer

beacon-chain/sync/checkpoint/BUILD.bazel

@@ -46,7 +46,6 @@ go_test(
         "//consensus-types/blocks/testing:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/ssz/detect:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//runtime/version:go_default_library",
         "//testing/require:go_default_library",

beacon-chain/sync/checkpoint/api_test.go

@@ -13,7 +13,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	blocktest "github.com/OffchainLabs/prysm/v6/consensus-types/blocks/testing"
 	"github.com/OffchainLabs/prysm/v6/encoding/ssz/detect"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
 	"github.com/OffchainLabs/prysm/v6/testing/util"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
@@ -23,6 +22,7 @@ import (
 func TestDownloadFinalizedData(t *testing.T) {
 	ctx := context.Background()
 	cfg := params.MainnetConfig()
+	cfg.InitializeForkSchedule()
 
 	// avoid the altair zone because genesis tests are easier to set up
 	epoch := cfg.AltairForkEpoch - 1
@@ -31,7 +31,7 @@ func TestDownloadFinalizedData(t *testing.T) {
 	require.NoError(t, err)
 	st, err := util.NewBeaconState()
 	require.NoError(t, err)
-	fork, err := forks.ForkForEpochFromConfig(cfg, epoch)
+	fork := params.ForkFromConfig(cfg, epoch)
 	require.NoError(t, err)
 	require.NoError(t, st.SetFork(fork))
 	require.NoError(t, st.SetSlot(slot))

beacon-chain/sync/checkpoint/weak-subjectivity_test.go

@@ -17,7 +17,6 @@ import (
 	blocktest "github.com/OffchainLabs/prysm/v6/consensus-types/blocks/testing"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/encoding/ssz/detect"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -84,7 +83,7 @@ func TestDownloadWeakSubjectivityCheckpoint(t *testing.T) {
 	require.NoError(t, err)
 	wst, err := util.NewBeaconState()
 	require.NoError(t, err)
-	fork, err := forkForEpoch(cfg, epoch)
+	fork, err := params.Fork(epoch)
 	require.NoError(t, err)
 	require.NoError(t, wst.SetFork(fork))
 
@@ -183,7 +182,7 @@ func TestDownloadBackwardsCompatibleCombined(t *testing.T) {
 	require.NoError(t, err)
 	wst, err := util.NewBeaconState()
 	require.NoError(t, err)
-	fork, err := forkForEpoch(cfg, cfg.GenesisEpoch)
+	fork, err := params.Fork(cfg.GenesisEpoch)
 	require.NoError(t, err)
 	require.NoError(t, wst.SetFork(fork))
 
@@ -280,33 +279,11 @@ func TestGetWeakSubjectivityEpochFromHead(t *testing.T) {
 	require.Equal(t, expectedEpoch, actualEpoch)
 }
 
-func forkForEpoch(cfg *params.BeaconChainConfig, epoch primitives.Epoch) (*ethpb.Fork, error) {
-	os := forks.NewOrderedSchedule(cfg)
-	currentVersion, err := os.VersionForEpoch(epoch)
-	if err != nil {
-		return nil, err
-	}
-	prevVersion, err := os.Previous(currentVersion)
-	if err != nil {
-		if !errors.Is(err, forks.ErrNoPreviousVersion) {
-			return nil, err
-		}
-		// use same version for both in the case of genesis
-		prevVersion = currentVersion
-	}
-	forkEpoch := cfg.ForkVersionSchedule[currentVersion]
-	return &ethpb.Fork{
-		PreviousVersion: prevVersion[:],
-		CurrentVersion:  currentVersion[:],
-		Epoch:           forkEpoch,
-	}, nil
-}
-
 func defaultTestHeadState(t *testing.T, cfg *params.BeaconChainConfig) (state.BeaconState, primitives.Epoch) {
 	st, err := util.NewBeaconStateAltair()
 	require.NoError(t, err)
 
-	fork, err := forkForEpoch(cfg, cfg.AltairForkEpoch)
+	fork, err := params.Fork(cfg.AltairForkEpoch)
 	require.NoError(t, err)
 	require.NoError(t, st.SetFork(fork))
 

beacon-chain/sync/context.go

@@ -3,7 +3,6 @@ package sync
 import (
 	"io"
 
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/libp2p/go-libp2p/core/network"
@@ -87,12 +86,8 @@ type ContextByteVersions map[[4]byte]int
 // and the runtime/version identifier for the corresponding fork.
 func ContextByteVersionsForValRoot(valRoot [32]byte) (ContextByteVersions, error) {
 	m := make(ContextByteVersions)
-	for fv, v := range params.ConfigForkVersions(params.BeaconConfig()) {
-		digest, err := signing.ComputeForkDigest(fv[:], valRoot[:])
-		if err != nil {
-			return nil, errors.Wrapf(err, "unable to compute fork digest for fork version %#x", fv)
-		}
-		m[digest] = v
+	for _, entry := range params.SortedNetworkScheduleEntries() {
+		m[entry.ForkDigest] = entry.VersionEnum
 	}
 	return m, nil
 }

beacon-chain/sync/decode_pubsub.go

@@ -6,7 +6,6 @@ import (
 	"strings"
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/blockchain"
-	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/signing"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/types"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
@@ -112,22 +111,14 @@ func extractDataTypeFromTypeMap[T any](typeMap map[[4]byte]func() (T, error), di
 	if len(digest) != forkDigestLength {
 		return zero, errors.Errorf("invalid digest returned, wanted a length of %d but received %d", forkDigestLength, len(digest))
 	}
-	vRoot := tor.GenesisValidatorsRoot()
-	for k, f := range typeMap {
-		rDigest, err := signing.ComputeForkDigest(k[:], vRoot[:])
-		if err != nil {
-			return zero, err
-		}
-		if rDigest == bytesutil.ToBytes4(digest) {
-			return f()
-		}
+	forkVersion, _, err := params.ForkDataFromDigest([4]byte(digest))
+	if err != nil {
+		return zero, errors.Wrapf(ErrNoValidDigest, "could not extract %T data type, saw digest=%#x", zero, digest)
 	}
-	return zero, errors.Wrapf(
-		ErrNoValidDigest,
-		"could not extract %T data type, saw digest=%#x, genesis=%v, vr=%#x",
-		zero,
-		digest,
-		tor.GenesisTime(),
-		tor.GenesisValidatorsRoot(),
-	)
+
+	f, ok := typeMap[forkVersion]
+	if ok {
+		return f()
+	}
+	return zero, errors.Wrapf(ErrNoValidDigest, "could not extract %T data type, saw digest=%#x", zero, digest)
 }

beacon-chain/sync/fork_watcher.go

@@ -4,7 +4,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	"github.com/libp2p/go-libp2p/core/protocol"
 	"github.com/pkg/errors"
@@ -42,54 +41,41 @@ func (s *Service) forkWatcher() {
 
 // registerForUpcomingFork registers appropriate gossip and RPC topic if there is a fork in the next epoch.
 func (s *Service) registerForUpcomingFork(currentEpoch primitives.Epoch) error {
-	// Get the genesis validators root.
-	genesisValidatorsRoot := s.cfg.clock.GenesisValidatorsRoot()
-
 	// Check if there is a fork in the next epoch.
-	isForkNextEpoch, err := forks.IsForkNextEpoch(s.cfg.clock.GenesisTime(), genesisValidatorsRoot[:])
-	if err != nil {
-		return errors.Wrap(err, "Could not retrieve next fork epoch")
-	}
+	isForkNextEpoch := params.IsForkNextEpoch(currentEpoch)
 
 	// Exit early if there is no fork in the next epoch.
 	if !isForkNextEpoch {
 		return nil
 	}
 
-	beforeForkEpoch := currentEpoch
-	forkEpoch := beforeForkEpoch + 1
-
-	// Get the fork afterForkDigest for the next epoch.
-	afterForkDigest, err := forks.ForkDigestFromEpoch(forkEpoch, genesisValidatorsRoot[:])
-	if err != nil {
-		return errors.Wrap(err, "could not retrieve fork digest")
-	}
-
+	nextForkEpoch := currentEpoch + 1
+	nextForkDigest := params.ForkDigest(nextForkEpoch)
 	// Exit early if the topics for the next epoch are already registered.
 	// It likely to be the case for all slots of the epoch that are not the first one.
-	if s.subHandler.digestExists(afterForkDigest) {
+	if s.subHandler.digestExists(nextForkDigest) {
 		return nil
 	}
 
 	// Register the subscribers (gossipsub) for the next epoch.
-	s.registerSubscribers(forkEpoch, afterForkDigest)
+	s.registerSubscribers(nextForkEpoch, nextForkDigest)
 
 	// Get the handlers for the current and next fork.
-	beforeForkHandlerByTopic, err := s.rpcHandlerByTopicFromEpoch(beforeForkEpoch)
+	currentHandler, err := s.rpcHandlerByTopicFromEpoch(currentEpoch)
 	if err != nil {
 		return errors.Wrap(err, "RPC handler by topic from before fork epoch")
 	}
 
-	forkHandlerByTopic, err := s.rpcHandlerByTopicFromEpoch(forkEpoch)
+	nextHandler, err := s.rpcHandlerByTopicFromEpoch(nextForkEpoch)
 	if err != nil {
 		return errors.Wrap(err, "RPC handler by topic from fork epoch")
 	}
 
 	// Compute newly added topics.
-	newRPCHandlerByTopic := addedRPCHandlerByTopic(beforeForkHandlerByTopic, forkHandlerByTopic)
+	newHandlersByTopic := addedRPCHandlerByTopic(currentHandler, nextHandler)
 
 	// Register the new RPC handlers.
-	for topic, handler := range newRPCHandlerByTopic {
+	for topic, handler := range newHandlersByTopic {
 		s.registerRPC(topic, handler)
 	}
 
@@ -98,11 +84,8 @@ func (s *Service) registerForUpcomingFork(currentEpoch primitives.Epoch) error {
 
 // deregisterFromPastFork deregisters appropriate gossip and RPC topic if there is a fork in the current epoch.
 func (s *Service) deregisterFromPastFork(currentEpoch primitives.Epoch) error {
-	// Extract the genesis validators root.
-	genesisValidatorsRoot := s.cfg.clock.GenesisValidatorsRoot()
-
 	// Get the fork.
-	currentFork, err := forks.Fork(currentEpoch)
+	currentFork, err := params.Fork(currentEpoch)
 	if err != nil {
 		return errors.Wrap(err, "genesis validators root")
 	}
@@ -123,10 +106,7 @@ func (s *Service) deregisterFromPastFork(currentEpoch primitives.Epoch) error {
 	// Look at the previous fork's digest.
 	beforeForkEpoch := currentFork.Epoch - 1
 
-	beforeForkDigest, err := forks.ForkDigestFromEpoch(beforeForkEpoch, genesisValidatorsRoot[:])
-	if err != nil {
-		return errors.Wrap(err, "fork digest from epoch")
-	}
+	beforeForkDigest := params.ForkDigest(beforeForkEpoch)
 
 	// Exit early if there are no topics with that particular digest.
 	if !s.subHandler.digestExists(beforeForkDigest) {

beacon-chain/sync/fork_watcher_test.go

@@ -14,7 +14,6 @@ import (
 	mockSync "github.com/OffchainLabs/prysm/v6/beacon-chain/sync/initial-sync/testing"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 )
@@ -93,9 +92,7 @@ func TestService_CheckForNextEpochFork(t *testing.T) {
 			currEpoch: 4,
 			wantErr:   false,
 			postSvcCheck: func(t *testing.T, s *Service) {
-				genRoot := s.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(5, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(5)
 				assert.Equal(t, true, s.subHandler.digestExists(digest))
 				rpcMap := make(map[string]bool)
 				for _, p := range s.cfg.p2p.Host().Mux().Protocols() {
@@ -138,9 +135,7 @@ func TestService_CheckForNextEpochFork(t *testing.T) {
 			currEpoch: 4,
 			wantErr:   false,
 			postSvcCheck: func(t *testing.T, s *Service) {
-				genRoot := s.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(5, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(5)
 				assert.Equal(t, true, s.subHandler.digestExists(digest))
 				rpcMap := make(map[string]bool)
 				for _, p := range s.cfg.p2p.Host().Mux().Protocols() {
@@ -181,9 +176,7 @@ func TestService_CheckForNextEpochFork(t *testing.T) {
 			currEpoch: 4,
 			wantErr:   false,
 			postSvcCheck: func(t *testing.T, s *Service) {
-				genRoot := s.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(5, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(5)
 				assert.Equal(t, true, s.subHandler.digestExists(digest))
 				rpcMap := make(map[string]bool)
 				for _, p := range s.cfg.p2p.Host().Mux().Protocols() {
@@ -226,9 +219,7 @@ func TestService_CheckForNextEpochFork(t *testing.T) {
 			currEpoch: 4,
 			wantErr:   false,
 			postSvcCheck: func(t *testing.T, s *Service) {
-				genRoot := s.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(5, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(5)
 				assert.Equal(t, true, s.subHandler.digestExists(digest))
 				rpcMap := make(map[string]bool)
 				for _, p := range s.cfg.p2p.Host().Mux().Protocols() {
@@ -271,9 +262,7 @@ func TestService_CheckForNextEpochFork(t *testing.T) {
 			currEpoch: 4,
 			wantErr:   false,
 			postSvcCheck: func(t *testing.T, s *Service) {
-				genRoot := s.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(5, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(5)
 				assert.Equal(t, true, s.subHandler.digestExists(digest))
 				rpcMap := make(map[string]bool)
 				for _, p := range s.cfg.p2p.Host().Mux().Protocols() {
@@ -392,14 +381,12 @@ func TestService_CheckForPreviousEpochFork(t *testing.T) {
 					r.registerRPC(topic, handler)
 				}
 
-				genRoot := r.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(0, genRoot[:])
+				digest := params.ForkDigest(0)
 				assert.NoError(t, err)
 				r.registerSubscribers(0, digest)
 				assert.Equal(t, true, r.subHandler.digestExists(digest))
 
-				digest, err = forks.ForkDigestFromEpoch(3, genRoot[:])
-				assert.NoError(t, err)
+				digest = params.ForkDigest(3)
 				r.registerSubscribers(3, digest)
 				assert.Equal(t, true, r.subHandler.digestExists(digest))
 
@@ -408,12 +395,9 @@ func TestService_CheckForPreviousEpochFork(t *testing.T) {
 			currEpoch: 4,
 			wantErr:   false,
 			postSvcCheck: func(t *testing.T, s *Service) {
-				genRoot := s.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(0, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(0)
 				assert.Equal(t, false, s.subHandler.digestExists(digest))
-				digest, err = forks.ForkDigestFromEpoch(3, genRoot[:])
-				assert.NoError(t, err)
+				digest = params.ForkDigest(3)
 				assert.Equal(t, true, s.subHandler.digestExists(digest))
 
 				ptcls := s.cfg.p2p.Host().Mux().Protocols()
@@ -460,14 +444,11 @@ func TestService_CheckForPreviousEpochFork(t *testing.T) {
 					chainStarted: abool.New(),
 					subHandler:   newSubTopicHandler(),
 				}
-				genRoot := r.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(1, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(1)
 				r.registerSubscribers(1, digest)
 				assert.Equal(t, true, r.subHandler.digestExists(digest))
 
-				digest, err = forks.ForkDigestFromEpoch(3, genRoot[:])
-				assert.NoError(t, err)
+				digest = params.ForkDigest(3)
 				r.registerSubscribers(3, digest)
 				assert.Equal(t, true, r.subHandler.digestExists(digest))
 
@@ -476,12 +457,9 @@ func TestService_CheckForPreviousEpochFork(t *testing.T) {
 			currEpoch: 4,
 			wantErr:   false,
 			postSvcCheck: func(t *testing.T, s *Service) {
-				genRoot := s.cfg.clock.GenesisValidatorsRoot()
-				digest, err := forks.ForkDigestFromEpoch(1, genRoot[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(1)
 				assert.Equal(t, false, s.subHandler.digestExists(digest))
-				digest, err = forks.ForkDigestFromEpoch(3, genRoot[:])
-				assert.NoError(t, err)
+				digest = params.ForkDigest(3)
 				assert.Equal(t, true, s.subHandler.digestExists(digest))
 			},
 		},

beacon-chain/sync/rpc_chunked_response.go

@@ -8,9 +8,7 @@ import (
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/blocks"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/interfaces"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
-	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	libp2pcore "github.com/libp2p/go-libp2p/core"
 	"github.com/pkg/errors"
@@ -30,57 +28,9 @@ func WriteBlockChunk(stream libp2pcore.Stream, tor blockchain.TemporalOracle, en
 	if _, err := stream.Write([]byte{responseCodeSuccess}); err != nil {
 		return err
 	}
-	var obtainedCtx []byte
 
-	valRoot := tor.GenesisValidatorsRoot()
-	switch blk.Version() {
-	case version.Phase0:
-		digest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().GenesisEpoch, valRoot[:])
-		if err != nil {
-			return err
-		}
-		obtainedCtx = digest[:]
-	case version.Altair:
-		digest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().AltairForkEpoch, valRoot[:])
-		if err != nil {
-			return err
-		}
-		obtainedCtx = digest[:]
-	case version.Bellatrix:
-		digest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().BellatrixForkEpoch, valRoot[:])
-		if err != nil {
-			return err
-		}
-		obtainedCtx = digest[:]
-	case version.Capella:
-		digest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().CapellaForkEpoch, valRoot[:])
-		if err != nil {
-			return err
-		}
-		obtainedCtx = digest[:]
-	case version.Deneb:
-		digest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().DenebForkEpoch, valRoot[:])
-		if err != nil {
-			return err
-		}
-		obtainedCtx = digest[:]
-	case version.Electra:
-		digest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().ElectraForkEpoch, valRoot[:])
-		if err != nil {
-			return err
-		}
-		obtainedCtx = digest[:]
-	case version.Fulu:
-		digest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().FuluForkEpoch, valRoot[:])
-		if err != nil {
-			return err
-		}
-		obtainedCtx = digest[:]
-	default:
-		return errors.Wrapf(ErrUnrecognizedVersion, "block version %d is not recognized", blk.Version())
-	}
-
-	if err := writeContextToStream(obtainedCtx, stream); err != nil {
+	digest := params.ForkDigest(slots.ToEpoch(blk.Block().Slot()))
+	if err := writeContextToStream(digest[:], stream); err != nil {
 		return err
 	}
 	_, err := encoding.EncodeWithMaxLength(stream, blk)
@@ -150,16 +100,11 @@ func WriteBlobSidecarChunk(stream libp2pcore.Stream, tor blockchain.TemporalOrac
 	if _, err := stream.Write([]byte{responseCodeSuccess}); err != nil {
 		return err
 	}
-	valRoot := tor.GenesisValidatorsRoot()
-	ctxBytes, err := forks.ForkDigestFromEpoch(slots.ToEpoch(sidecar.Slot()), valRoot[:])
-	if err != nil {
-		return err
-	}
-
+	ctxBytes := params.ForkDigest(slots.ToEpoch(sidecar.Slot()))
 	if err := writeContextToStream(ctxBytes[:], stream); err != nil {
 		return err
 	}
-	_, err = encoding.EncodeWithMaxLength(stream, sidecar)
+	_, err := encoding.EncodeWithMaxLength(stream, sidecar)
 	return err
 }
 
@@ -168,18 +113,12 @@ func WriteLightClientBootstrapChunk(stream libp2pcore.Stream, tor blockchain.Tem
 		return err
 	}
 
-	valRoot := tor.GenesisValidatorsRoot()
-	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(bootstrap.Header().Beacon().Slot), valRoot[:])
-	if err != nil {
+	digest := params.ForkDigest(slots.ToEpoch(bootstrap.Header().Beacon().Slot))
+	if err := writeContextToStream(digest[:], stream); err != nil {
 		return err
 	}
 
-	obtainedCtx := digest[:]
-	if err = writeContextToStream(obtainedCtx, stream); err != nil {
-		return err
-	}
-
-	_, err = encoding.EncodeWithMaxLength(stream, bootstrap)
+	_, err := encoding.EncodeWithMaxLength(stream, bootstrap)
 	return err
 }
 
@@ -188,17 +127,11 @@ func WriteLightClientUpdateChunk(stream libp2pcore.Stream, tor blockchain.Tempor
 		return err
 	}
 
-	valRoot := tor.GenesisValidatorsRoot()
-	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(update.AttestedHeader().Beacon().Slot), valRoot[:])
-	if err != nil {
+	digest := params.ForkDigest(slots.ToEpoch(update.AttestedHeader().Beacon().Slot))
+	if err := writeContextToStream(digest[:], stream); err != nil {
 		return err
 	}
-	obtainedCtx := digest[:]
-
-	if err = writeContextToStream(obtainedCtx, stream); err != nil {
-		return err
-	}
-	_, err = encoding.EncodeWithMaxLength(stream, update)
+	_, err := encoding.EncodeWithMaxLength(stream, update)
 	return err
 }
 
@@ -207,17 +140,12 @@ func WriteLightClientOptimisticUpdateChunk(stream libp2pcore.Stream, tor blockch
 		return err
 	}
 
-	valRoot := tor.GenesisValidatorsRoot()
-	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(update.AttestedHeader().Beacon().Slot), valRoot[:])
-	if err != nil {
-		return err
-	}
-	obtainedCtx := digest[:]
+	digest := params.ForkDigest(slots.ToEpoch(update.AttestedHeader().Beacon().Slot))
 
-	if err = writeContextToStream(obtainedCtx, stream); err != nil {
+	if err := writeContextToStream(digest[:], stream); err != nil {
 		return err
 	}
-	_, err = encoding.EncodeWithMaxLength(stream, update)
+	_, err := encoding.EncodeWithMaxLength(stream, update)
 	return err
 }
 
@@ -226,17 +154,12 @@ func WriteLightClientFinalityUpdateChunk(stream libp2pcore.Stream, tor blockchai
 		return err
 	}
 
-	valRoot := tor.GenesisValidatorsRoot()
-	digest, err := forks.ForkDigestFromEpoch(slots.ToEpoch(update.AttestedHeader().Beacon().Slot), valRoot[:])
-	if err != nil {
-		return err
-	}
-	obtainedCtx := digest[:]
+	digest := params.ForkDigest(slots.ToEpoch(update.AttestedHeader().Beacon().Slot))
 
-	if err = writeContextToStream(obtainedCtx, stream); err != nil {
+	if err := writeContextToStream(digest[:], stream); err != nil {
 		return err
 	}
-	_, err = encoding.EncodeWithMaxLength(stream, update)
+	_, err := encoding.EncodeWithMaxLength(stream, update)
 	return err
 }
 
@@ -246,15 +169,10 @@ func WriteDataColumnSidecarChunk(stream libp2pcore.Stream, tor blockchain.Tempor
 	if _, err := stream.Write([]byte{responseCodeSuccess}); err != nil {
 		return err
 	}
-	valRoot := tor.GenesisValidatorsRoot()
-	ctxBytes, err := forks.ForkDigestFromEpoch(slots.ToEpoch(sidecar.SignedBlockHeader.Header.Slot), valRoot[:])
-	if err != nil {
-		return err
-	}
-
+	ctxBytes := params.ForkDigestFromEpoch(slots.ToEpoch(sidecar.SignedBlockHeader.Header.Slot))
 	if err := writeContextToStream(ctxBytes[:], stream); err != nil {
 		return err
 	}
-	_, err = encoding.EncodeWithMaxLength(stream, sidecar)
+	_, err := encoding.EncodeWithMaxLength(stream, sidecar)
 	return err
 }

beacon-chain/sync/rpc_light_client_test.go

@@ -17,7 +17,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/config/features"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	leakybucket "github.com/OffchainLabs/prysm/v6/container/leaky-bucket"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -63,17 +62,11 @@ func TestRPC_LightClientBootstrap(t *testing.T) {
 	topic := string(pcl)
 	r.rateLimiter.limiterMap[topic] = leakybucket.NewCollector(10000, 10000, time.Second, false)
 
-	altairDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().AltairForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	bellatrixDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().BellatrixForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	capellaDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().CapellaForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	denebDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().DenebForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	electraDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().ElectraForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-
+	altairDigest := params.ForkDigest(params.BeaconConfig().AltairForkEpoch)
+	bellatrixDigest := params.ForkDigest(params.BeaconConfig().BellatrixForkEpoch)
+	capellaDigest := params.ForkDigest(params.BeaconConfig().CapellaForkEpoch)
+	denebDigest := params.ForkDigest(params.BeaconConfig().DenebForkEpoch)
+	electraDigest := params.ForkDigest(params.BeaconConfig().ElectraForkEpoch)
 	for i := 1; i <= 5; i++ {
 		t.Run(version.String(i), func(t *testing.T) {
 			l := util.NewTestLightClient(t, i)
@@ -185,16 +178,11 @@ func TestRPC_LightClientOptimisticUpdate(t *testing.T) {
 	topic := string(pcl)
 	r.rateLimiter.limiterMap[topic] = leakybucket.NewCollector(10000, 10000, time.Second, false)
 
-	altairDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().AltairForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	bellatrixDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().BellatrixForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	capellaDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().CapellaForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	denebDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().DenebForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	electraDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().ElectraForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
+	altairDigest := params.ForkDigest(params.BeaconConfig().AltairForkEpoch)
+	bellatrixDigest := params.ForkDigest(params.BeaconConfig().BellatrixForkEpoch)
+	capellaDigest := params.ForkDigest(params.BeaconConfig().CapellaForkEpoch)
+	denebDigest := params.ForkDigest(params.BeaconConfig().DenebForkEpoch)
+	electraDigest := params.ForkDigest(params.BeaconConfig().ElectraForkEpoch)
 
 	for i := 1; i <= 5; i++ {
 		t.Run(version.String(i), func(t *testing.T) {
@@ -305,16 +293,11 @@ func TestRPC_LightClientFinalityUpdate(t *testing.T) {
 	topic := string(pcl)
 	r.rateLimiter.limiterMap[topic] = leakybucket.NewCollector(10000, 10000, time.Second, false)
 
-	altairDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().AltairForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	bellatrixDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().BellatrixForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	capellaDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().CapellaForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	denebDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().DenebForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	electraDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().ElectraForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
+	altairDigest := params.ForkDigest(params.BeaconConfig().AltairForkEpoch)
+	bellatrixDigest := params.ForkDigest(params.BeaconConfig().BellatrixForkEpoch)
+	capellaDigest := params.ForkDigest(params.BeaconConfig().CapellaForkEpoch)
+	denebDigest := params.ForkDigest(params.BeaconConfig().DenebForkEpoch)
+	electraDigest := params.ForkDigest(params.BeaconConfig().ElectraForkEpoch)
 
 	for i := 1; i <= 5; i++ {
 		t.Run(version.String(i), func(t *testing.T) {
@@ -425,16 +408,11 @@ func TestRPC_LightClientUpdatesByRange(t *testing.T) {
 	topic := string(pcl)
 	r.rateLimiter.limiterMap[topic] = leakybucket.NewCollector(10000, 10000, time.Second, false)
 
-	altairDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().AltairForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	bellatrixDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().BellatrixForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	capellaDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().CapellaForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	denebDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().DenebForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
-	electraDigest, err := forks.ForkDigestFromEpoch(params.BeaconConfig().ElectraForkEpoch, chainService.ValidatorsRoot[:])
-	require.NoError(t, err)
+	altairDigest := params.ForkDigest(params.BeaconConfig().AltairForkEpoch)
+	bellatrixDigest := params.ForkDigest(params.BeaconConfig().BellatrixForkEpoch)
+	capellaDigest := params.ForkDigest(params.BeaconConfig().CapellaForkEpoch)
+	denebDigest := params.ForkDigest(params.BeaconConfig().DenebForkEpoch)
+	electraDigest := params.ForkDigest(params.BeaconConfig().ElectraForkEpoch)
 
 	for i := 1; i <= 5; i++ {
 		t.Run(version.String(i), func(t *testing.T) {

beacon-chain/sync/rpc_metadata.go

@@ -5,8 +5,8 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/types"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/wrapper"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/metadata"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
@@ -168,17 +168,9 @@ func (s *Service) sendMetaDataRequest(ctx context.Context, peerID peer.ID) (meta
 		return nil, errors.New(errMsg)
 	}
 
-	// Get the genesis validators root.
-	valRoot := s.cfg.clock.GenesisValidatorsRoot()
-
-	// Get the fork digest from the current epoch and the genesis validators root.
-	rpcCtx, err := forks.ForkDigestFromEpoch(currentEpoch, valRoot[:])
-	if err != nil {
-		return nil, errors.Wrap(err, "fork digest from epoch")
-	}
-
+	digest := params.ForkDigestFromEpoch(currentEpoch)
 	// Instantiate zero value of the metadata.
-	msg, err := extractDataTypeFromTypeMap(types.MetaDataMap, rpcCtx[:], s.cfg.clock)
+	msg, err := extractDataTypeFromTypeMap(types.MetaDataMap, digest[:], s.cfg.clock)
 	if err != nil {
 		return nil, errors.Wrap(err, "extract data type from type map")
 	}

beacon-chain/sync/subscriber.go

@@ -15,15 +15,14 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/core/peerdas"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/peers"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/cmd/beacon-chain/flags"
 	"github.com/OffchainLabs/prysm/v6/config/features"
-	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v6/container/slice"
 	"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/runtime/messagehandler"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
@@ -206,8 +205,7 @@ func (s *Service) registerSubscribers(epoch primitives.Epoch, digest [4]byte) {
 // subscribe to a given topic with a given validator and subscription handler.
 // The base protobuf message is used to initialize new messages for decoding.
 func (s *Service) subscribe(topic string, validator wrappedVal, handle subHandler, digest [4]byte) *pubsub.Subscription {
-	genRoot := s.cfg.clock.GenesisValidatorsRoot()
-	_, e, err := forks.RetrieveForkDataFromDigest(digest, genRoot[:])
+	_, e, err := params.ForkDataFromDigest(digest)
 	if err != nil {
 		// Impossible condition as it would mean digest does not exist.
 		panic(err) // lint:nopanic -- Impossible condition.
@@ -441,10 +439,8 @@ func (s *Service) searchForPeers(
 func (s *Service) subscribeToSubnets(
 	topicFormat string,
 	digest [4]byte,
-	genesisValidatorsRoot [fieldparams.RootLength]byte,
-	genesisTime time.Time,
+	clock *startup.Clock,
 	subscriptions map[uint64]*pubsub.Subscription,
-	currentSlot primitives.Slot,
 	validate wrappedVal,
 	handle subHandler,
 	getSubnetsToSubscribe func(currentSlot primitives.Slot) []uint64,
@@ -455,7 +451,7 @@ func (s *Service) subscribeToSubnets(
 	}
 
 	// Check the validity of the digest.
-	valid, err := isDigestValid(digest, genesisTime, genesisValidatorsRoot)
+	valid, err := isDigestValid(digest, clock)
 	if err != nil {
 		log.Error(err)
 		return true
@@ -482,7 +478,7 @@ func (s *Service) subscribeToSubnets(
 	}
 
 	// Retrieve the subnets we want to subscribe to.
-	subnetsToSubscribeIndex := getSubnetsToSubscribe(currentSlot)
+	subnetsToSubscribeIndex := getSubnetsToSubscribe(clock.CurrentSlot())
 
 	// Remove subscriptions that are no longer wanted.
 	s.pruneSubscriptions(subscriptions, subnetsToSubscribeIndex, topicFormat, digest)
@@ -517,11 +513,8 @@ func (s *Service) subscribeWithParameters(
 	// Initialize the subscriptions map.
 	subscriptions := make(map[uint64]*pubsub.Subscription)
 
-	// Retrieve the genesis validators root.
-	genesisValidatorsRoot := s.cfg.clock.GenesisValidatorsRoot()
-
 	// Retrieve the epoch of the fork corresponding to the digest.
-	_, epoch, err := forks.RetrieveForkDataFromDigest(digest, genesisValidatorsRoot[:])
+	_, epoch, err := params.ForkDataFromDigest(digest)
 	if err != nil {
 		panic(err) // lint:nopanic -- Impossible condition.
 	}
@@ -540,7 +533,9 @@ func (s *Service) subscribeWithParameters(
 	secondsPerSlotDuration := time.Duration(secondsPerSlot) * time.Second
 
 	currentSlot := s.cfg.clock.CurrentSlot()
-	s.subscribeToSubnets(topicFormat, digest, genesisValidatorsRoot, genesisTime, subscriptions, currentSlot, validate, handle, getSubnetsToSubscribe)
+
+	// Subscribe to subnets.
+	s.subscribeToSubnets(topicFormat, digest, s.cfg.clock, subscriptions, validate, handle, getSubnetsToSubscribe)
 
 	logCtx, cancel := context.WithCancel(s.ctx)
 
@@ -563,7 +558,7 @@ func (s *Service) subscribeWithParameters(
 		for {
 			select {
 			case currentSlot := <-slotTicker.C():
-				isDigestValid := s.subscribeToSubnets(topicFormat, digest, genesisValidatorsRoot, genesisTime, subscriptions, currentSlot, validate, handle, getSubnetsToSubscribe)
+				isDigestValid := s.subscribeToSubnets(topicFormat, digest, s.cfg.clock, subscriptions, validate, handle, getSubnetsToSubscribe)
 
 				// Stop the ticker if the digest is not valid. Likely to happen after a hard fork.
 				if !isDigestValid {
@@ -722,27 +717,19 @@ func (*Service) addDigestAndIndexToTopic(topic string, digest [4]byte, idx uint6
 }
 
 func (s *Service) currentForkDigest() ([4]byte, error) {
-	genRoot := s.cfg.clock.GenesisValidatorsRoot()
-	return forks.CreateForkDigest(s.cfg.clock.GenesisTime(), genRoot[:])
+	return params.ForkDigest(s.cfg.clock.CurrentEpoch()), nil
 }
 
 // Checks if the provided digest matches up with the current supposed digest.
-func isDigestValid(digest [4]byte, genesis time.Time, genValRoot [32]byte) (bool, error) {
-	retDigest, err := forks.CreateForkDigest(genesis, genValRoot[:])
-	if err != nil {
-		return false, err
-	}
-	isNextEpoch, err := forks.IsForkNextEpoch(genesis, genValRoot[:])
-	if err != nil {
-		return false, err
-	}
+func isDigestValid(digest [4]byte, clock *startup.Clock) (bool, error) {
+	currentEpoch := clock.CurrentEpoch()
 	// In the event there is a fork the next epoch,
 	// we skip the check, as we subscribe subnets an
 	// epoch in advance.
-	if isNextEpoch {
+	if params.IsForkNextEpoch(currentEpoch) {
 		return true, nil
 	}
-	return retDigest == digest, nil
+	return params.ForkDigest(currentEpoch) == digest, nil
 }
 
 func computeSubnetsToFindPeersIndex(

beacon-chain/sync/subscriber_test.go

@@ -26,7 +26,6 @@ import (
 	"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/runtime/version"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
@@ -319,8 +318,8 @@ func Test_wrapAndReportValidation(t *testing.T) {
 		Genesis:        time.Now(),
 		ValidatorsRoot: [32]byte{0x01},
 	}
-	fd, err := forks.CreateForkDigest(mChain.GenesisTime(), mChain.ValidatorsRoot[:])
-	assert.NoError(t, err)
+	clock := startup.NewClock(mChain.Genesis, mChain.ValidatorsRoot)
+	fd := params.ForkDigest(clock.CurrentEpoch())
 	mockTopic := fmt.Sprintf(p2p.BlockSubnetTopicFormat, fd) + encoder.SszNetworkEncoder{}.ProtocolSuffix()
 	type args struct {
 		topic        string
@@ -610,17 +609,18 @@ func TestSubscribeWithSyncSubnets_DynamicSwitchFork(t *testing.T) {
 }
 
 func TestIsDigestValid(t *testing.T) {
+	clock := startup.NewClock(time.Now().Add(-100*time.Second), [32]byte{'A'})
 	genRoot := [32]byte{'A'}
 	digest, err := signing.ComputeForkDigest(params.BeaconConfig().GenesisForkVersion, genRoot[:])
 	assert.NoError(t, err)
-	valid, err := isDigestValid(digest, time.Now().Add(-100*time.Second), genRoot)
+	valid, err := isDigestValid(digest, clock)
 	assert.NoError(t, err)
 	assert.Equal(t, true, valid)
 
 	// Compute future fork digest that will be invalid currently.
 	digest, err = signing.ComputeForkDigest(params.BeaconConfig().AltairForkVersion, genRoot[:])
 	assert.NoError(t, err)
-	valid, err = isDigestValid(digest, time.Now().Add(-100*time.Second), genRoot)
+	valid, err = isDigestValid(digest, clock)
 	assert.NoError(t, err)
 	assert.Equal(t, false, valid)
 }

beacon-chain/sync/subscription_topic_handler_test.go

@@ -7,7 +7,8 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
+	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	pubsub "github.com/libp2p/go-libp2p-pubsub"
 )
@@ -18,8 +19,8 @@ func TestSubTopicHandler_CRUD(t *testing.T) {
 	assert.Equal(t, false, h.topicExists("junk"))
 	assert.Equal(t, false, h.digestExists([4]byte{}))
 
-	digest, err := forks.CreateForkDigest(time.Now(), make([]byte, 32))
-	assert.NoError(t, err)
+	clock := startup.NewClock(time.Now(), [32]byte{})
+	digest := params.ForkDigest(clock.CurrentEpoch())
 	enc := encoder.SszNetworkEncoder{}
 
 	// Valid topic added in.

beacon-chain/sync/validate_sync_committee_message_test.go

@@ -22,7 +22,6 @@ import (
 	"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"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/testing/assert"
 	"github.com/OffchainLabs/prysm/v6/testing/require"
@@ -224,8 +223,7 @@ func TestService_ValidateSyncCommitteeMessage(t *testing.T) {
 				gt := time.Now().Add(-time.Second * time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Duration(slots.PrevSlot(hState.Slot())))
 				vr := [32]byte{'A'}
 				clock := startup.NewClock(gt, vr)
-				digest, err := forks.CreateForkDigest(gt, vr[:])
-				assert.NoError(t, err)
+				digest := params.ForkDigest(slots.ToEpoch(clock.CurrentSlot()))
 				actualTopic := fmt.Sprintf(defaultTopic, digest, 5)
 
 				return s, actualTopic, clock
@@ -270,8 +268,8 @@ func TestService_ValidateSyncCommitteeMessage(t *testing.T) {
 
 				gt := time.Now().Add(-time.Second * time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Duration(slots.PrevSlot(hState.Slot())))
 				vr := [32]byte{'A'}
-				digest, err := forks.CreateForkDigest(gt, vr[:])
-				assert.NoError(t, err)
+				clock := startup.NewClock(gt, vr)
+				digest := params.ForkDigest(clock.CurrentEpoch())
 				actualTopic := fmt.Sprintf(defaultTopic, digest, 5)
 
 				return s, actualTopic, startup.NewClock(gt, vr)
@@ -324,8 +322,8 @@ func TestService_ValidateSyncCommitteeMessage(t *testing.T) {
 				// Set Topic and Subnet
 				gt := time.Now().Add(-time.Second * time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Duration(slots.PrevSlot(hState.Slot())))
 				vr := [32]byte{'A'}
-				digest, err := forks.CreateForkDigest(gt, vr[:])
-				assert.NoError(t, err)
+				clock := startup.NewClock(gt, vr)
+				digest := params.ForkDigest(slots.ToEpoch(clock.CurrentSlot()))
 				actualTopic := fmt.Sprintf(defaultTopic, digest, 5)
 
 				return s, actualTopic, startup.NewClock(gt, vr)
@@ -382,8 +380,8 @@ func TestService_ValidateSyncCommitteeMessage(t *testing.T) {
 				// Set Topic and Subnet
 				gt := time.Now().Add(-time.Second * time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Duration(slots.PrevSlot(hState.Slot())))
 				vr := [32]byte{'A'}
-				digest, err := forks.CreateForkDigest(gt, vr[:])
-				assert.NoError(t, err)
+				clock := startup.NewClock(gt, vr)
+				digest := params.ForkDigest(slots.ToEpoch(clock.CurrentSlot()))
 				actualTopic := fmt.Sprintf(defaultTopic, digest, 1)
 
 				return s, actualTopic, startup.NewClock(gt, vr)

beacon-chain/verification/BUILD.bazel

@@ -35,7 +35,6 @@ go_library(
         "//consensus-types/primitives:go_default_library",
         "//crypto/bls:go_default_library",
         "//encoding/bytesutil:go_default_library",
-        "//network/forks:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//runtime/logging:go_default_library",
         "//time/slots:go_default_library",

beacon-chain/verification/cache.go

@@ -13,7 +13,6 @@ import (
 	"github.com/OffchainLabs/prysm/v6/config/params"
 	"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/time/slots"
 	lru "github.com/hashicorp/golang-lru"
@@ -63,7 +62,7 @@ func (d signatureData) logFields() logrus.Fields {
 
 func newSigCache(vr []byte, size int, gf forkLookup) *sigCache {
 	if gf == nil {
-		gf = forks.Fork
+		gf = params.Fork
 	}
 	return &sigCache{Cache: lruwrpr.New(size), valRoot: vr, getFork: gf}
 }

beacon-chain/verification/initializer.go

@@ -10,9 +10,9 @@ import (
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/startup"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/state"
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
+	"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/network/forks"
 	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 )
 
@@ -108,7 +108,7 @@ func NewInitializerWaiter(cw startup.ClockWaiter, fc Forkchoicer, sr StateByRoot
 		o(iw)
 	}
 	if iw.getFork == nil {
-		iw.getFork = forks.Fork
+		iw.getFork = params.Fork
 	}
 	return iw
 }

changelog/kasey_decouple-proto-params.md

@@ -0,0 +1,2 @@
+### Ignored
+- remove usages of params from the proto package so that the params package can access proto types.

changelog/potuz_eip_7917.md

@@ -0,0 +1,3 @@
+### Added
+
+- Implement EIP-7917: Stable proposer lookahead. 

changelog/tt_fugu_.md

@@ -0,0 +1,3 @@
+### Removed
+
+- Deneb and electra entries from blob schedule.

cmd/prysmctl/p2p/BUILD.bazel

@@ -20,6 +20,7 @@ go_library(
         "//beacon-chain/p2p:go_default_library",
         "//beacon-chain/p2p/encoder:go_default_library",
         "//beacon-chain/p2p/types:go_default_library",
+        "//beacon-chain/startup:go_default_library",
         "//beacon-chain/sync:go_default_library",
         "//cmd:go_default_library",
         "//config/params:go_default_library",
@@ -31,7 +32,6 @@ 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/version:go_default_library",

cmd/prysmctl/p2p/client.go

@@ -9,13 +9,13 @@ import (
 
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p"
 	"github.com/OffchainLabs/prysm/v6/beacon-chain/p2p/encoder"
+	"github.com/OffchainLabs/prysm/v6/config/params"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/wrapper"
 	ecdsaprysm "github.com/OffchainLabs/prysm/v6/crypto/ecdsa"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing"
 	"github.com/OffchainLabs/prysm/v6/monitoring/tracing/trace"
 	"github.com/OffchainLabs/prysm/v6/network"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1/metadata"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
@@ -178,7 +178,7 @@ func (c *client) initializeMockChainService(ctx context.Context) (*mockChain, er
 		return nil, err
 	}
 	currEpoch := slots.ToEpoch(slots.SinceGenesis(genesisResp.GenesisTime.AsTime()))
-	currFork, err := forks.Fork(currEpoch)
+	currFork, err := params.Fork(currEpoch)
 	if err != nil {
 		return nil, err
 	}

cmd/prysmctl/p2p/handshake.go

@@ -4,8 +4,10 @@ import (
 	"context"
 
 	"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/consensus-types/primitives"
-	"github.com/OffchainLabs/prysm/v6/network/forks"
+	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
 	pb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v6/time/slots"
 	libp2pcore "github.com/libp2p/go-libp2p/core"
@@ -50,11 +52,9 @@ func (c *client) statusRPCHandler(ctx context.Context, _ interface{}, stream lib
 	if err != nil {
 		return err
 	}
-	digest, err := forks.CreateForkDigest(resp.GenesisTime.AsTime(), resp.GenesisValidatorsRoot)
-	if err != nil {
-		return err
-	}
-	kindOfFork, err := forks.Fork(slots.ToEpoch(chainHead.HeadSlot))
+	clock := startup.NewClock(resp.GenesisTime.AsTime(), bytesutil.ToBytes32(resp.GenesisValidatorsRoot))
+	digest := params.ForkDigest(slots.ToEpoch(clock.CurrentSlot()))
+	kindOfFork, err := params.Fork(slots.ToEpoch(chainHead.HeadSlot))
 	if err != nil {
 		return err
 	}

config/params/BUILD.bazel

@@ -7,6 +7,8 @@ go_library(
         "config_utils_develop.go",  # keep
         "config_utils_prod.go",
         "configset.go",
+        "errors.go",
+        "fork.go",
         "init.go",
         "interop.go",
         "io_config.go",
@@ -28,8 +30,11 @@ go_library(
     deps = [
         "//config/fieldparams:go_default_library",
         "//consensus-types/primitives:go_default_library",
+        "//crypto/hash:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//math:go_default_library",
+        "//proto/engine/v1:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
         "//runtime/version:go_default_library",
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_ethereum_go_ethereum//params:go_default_library",
@@ -47,6 +52,8 @@ go_test(
         "checktags_test.go",
         "config_test.go",
         "configset_test.go",
+        "export_test.go",
+        "fork_test.go",
         "loader_test.go",
         "mainnet_config_export_test.go",
         "mainnet_config_test.go",
@@ -73,6 +80,7 @@ go_test(
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//io/file:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",

config/params/config.go

@@ -2,15 +2,23 @@
 package params
 
 import (
+	"encoding/binary"
+	"fmt"
 	"math"
 	"slices"
+	"sort"
 	"time"
 
+	log "github.com/sirupsen/logrus"
+
 	fieldparams "github.com/OffchainLabs/prysm/v6/config/fieldparams"
 	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	"github.com/OffchainLabs/prysm/v6/crypto/hash"
 	"github.com/OffchainLabs/prysm/v6/encoding/bytesutil"
+	enginev1 "github.com/OffchainLabs/prysm/v6/proto/engine/v1"
 	"github.com/OffchainLabs/prysm/v6/runtime/version"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/pkg/errors"
 )
 
 // BeaconChainConfig contains constant configs for node to participate in beacon chain.
@@ -313,18 +321,224 @@ type BeaconChainConfig struct {
 	// DeprecatedMaxBlobsPerBlockFulu defines the max blobs that could exist in a block post Fulu hard fork.
 	// Deprecated: This field is no longer supported. Avoid using it.
 	DeprecatedMaxBlobsPerBlockFulu int `yaml:"MAX_BLOBS_PER_BLOCK_FULU" spec:"true"`
+	forkSchedule                   *NetworkSchedule
+	bpoSchedule                    *NetworkSchedule
+	networkSchedule                *NetworkSchedule
 }
 
-type BlobScheduleEntry struct {
-	Epoch            primitives.Epoch `yaml:"EPOCH"`
+func (b *BeaconChainConfig) ExecutionRequestLimits() enginev1.ExecutionRequestLimits {
+	return enginev1.ExecutionRequestLimits{
+		Deposits:       b.MaxDepositRequestsPerPayload,
+		Withdrawals:    b.MaxWithdrawalsPerPayload,
+		Consolidations: b.MaxConsolidationsRequestsPerPayload,
+	}
+}
+
+type NetworkScheduleEntry struct {
+	ForkVersion      [fieldparams.VersionLength]byte
+	ForkDigest       [4]byte
 	MaxBlobsPerBlock uint64           `yaml:"MAX_BLOBS_PER_BLOCK"`
+	Epoch            primitives.Epoch `yaml:"EPOCH"`
+	VersionEnum      int
+	isFork           bool
 }
 
+func (ns NetworkScheduleEntry) Copy() NetworkScheduleEntry {
+	return NetworkScheduleEntry{
+		ForkVersion:      ns.ForkVersion,
+		ForkDigest:       ns.ForkDigest,
+		MaxBlobsPerBlock: ns.MaxBlobsPerBlock,
+		Epoch:            ns.Epoch,
+		isFork:           ns.isFork,
+	}
+}
+
+type BlobScheduleEntry NetworkScheduleEntry
+
+// TODO: this needs to be able to return an error
 // InitializeForkSchedule initializes the schedules forks baked into the config.
 func (b *BeaconChainConfig) InitializeForkSchedule() {
 	// Reset Fork Version Schedule.
 	b.ForkVersionSchedule = configForkSchedule(b)
 	b.ForkVersionNames = configForkNames(b)
+	b.forkSchedule = initForkSchedule(b)
+	b.bpoSchedule = initBPOSchedule(b)
+	combined := b.forkSchedule.merge(b.bpoSchedule)
+	if err := combined.prepare(b); err != nil {
+		log.WithError(err).Error("failed to prepare network schedule", "error", err)
+	}
+	b.networkSchedule = combined
+}
+
+type NetworkSchedule struct {
+	entries   []NetworkScheduleEntry
+	byEpoch   map[primitives.Epoch]*NetworkScheduleEntry
+	byVersion map[[4]byte]*NetworkScheduleEntry
+	byDigest  map[[4]byte]*NetworkScheduleEntry
+}
+
+func newNetworkSchedule(entries []NetworkScheduleEntry) *NetworkSchedule {
+	return &NetworkSchedule{
+		entries:   entries,
+		byEpoch:   make(map[primitives.Epoch]*NetworkScheduleEntry),
+		byVersion: make(map[[4]byte]*NetworkScheduleEntry),
+		byDigest:  make(map[[4]byte]*NetworkScheduleEntry),
+	}
+}
+
+func (ns *NetworkSchedule) nextEpochIdx(epoch primitives.Epoch) int {
+	return sort.Search(len(ns.entries), func(i int) bool {
+		return ns.entries[i].Epoch > epoch
+	})
+}
+
+func (ns *NetworkSchedule) Next(epoch primitives.Epoch) NetworkScheduleEntry {
+	nextIdx := ns.nextEpochIdx(epoch)
+	if nextIdx < len(ns.entries) && ns.entries[nextIdx].Epoch != BeaconConfig().FarFutureEpoch {
+		return ns.entries[nextIdx]
+	}
+	return ns.LastEntry()
+}
+
+func (ns *NetworkSchedule) LastEntry() NetworkScheduleEntry {
+	for i := len(ns.entries) - 1; i >= 0; i-- {
+		if ns.entries[i].Epoch != BeaconConfig().FarFutureEpoch {
+			return ns.entries[i]
+		}
+	}
+	return ns.entries[0]
+}
+
+// LastFork is the last full fork (this is used by e2e testing)
+func (ns *NetworkSchedule) LastFork() NetworkScheduleEntry {
+	for i := len(ns.entries) - 1; i >= 0; i-- {
+		if ns.entries[i].isFork && ns.entries[i].Epoch != BeaconConfig().FarFutureEpoch {
+			return ns.entries[i]
+		}
+	}
+	return ns.entries[0]
+}
+
+func (ns *NetworkSchedule) ForEpoch(epoch primitives.Epoch) NetworkScheduleEntry {
+	nextIdx := ns.nextEpochIdx(epoch)
+	if nextIdx > 0 {
+		return ns.entries[nextIdx-1]
+	}
+	return ns.entries[0]
+}
+
+func (ns *NetworkSchedule) activatedAt(epoch primitives.Epoch) (*NetworkScheduleEntry, bool) {
+	entry, ok := ns.byEpoch[epoch]
+	return entry, ok
+}
+
+func (ns *NetworkSchedule) merge(other *NetworkSchedule) *NetworkSchedule {
+	merged := make([]NetworkScheduleEntry, 0, len(ns.entries)+len(other.entries))
+	merged = append(merged, ns.entries...)
+	merged = append(merged, other.entries...)
+	sort.Slice(merged, func(i, j int) bool {
+		if merged[i].Epoch == merged[j].Epoch {
+			return merged[i].isFork
+		}
+		return merged[i].Epoch < merged[j].Epoch
+	})
+	return newNetworkSchedule(merged)
+}
+
+func (ns *NetworkSchedule) index(e NetworkScheduleEntry) {
+	if _, ok := ns.byEpoch[e.Epoch]; !ok {
+		ns.byDigest[e.ForkDigest] = &e
+	}
+	if _, ok := ns.byVersion[e.ForkVersion]; !ok {
+		ns.byVersion[e.ForkVersion] = &e
+	}
+	if _, ok := ns.byEpoch[e.Epoch]; !ok {
+		ns.byEpoch[e.Epoch] = &e
+	}
+}
+
+func (ns *NetworkSchedule) prepare(b *BeaconChainConfig) error {
+	if len(ns.entries) == 0 {
+		return errors.New("cannot compute digests for an empty network schedule")
+	}
+	if !ns.entries[0].isFork {
+		return errors.New("cannot compute digests for a network schedule without a fork entry")
+	}
+	lastFork, err := entryWithForkDigest(ns.entries[0], b)
+	if err != nil {
+		return err
+	}
+	// TODO: I don't think I need this copy thing but I'm paranoid and tired, remove it later
+	ns.entries[0] = lastFork.Copy()
+	ns.index(ns.entries[0])
+	lastBlobs := lastFork.MaxBlobsPerBlock
+	for i := 1; i < len(ns.entries); i++ {
+		entry := ns.entries[i]
+		if entry.isFork {
+			lastFork = entry
+		} else {
+			entry.ForkVersion = lastFork.ForkVersion
+			entry.VersionEnum = lastFork.VersionEnum
+		}
+		if entry.MaxBlobsPerBlock > 0 {
+			lastBlobs = entry.MaxBlobsPerBlock
+		} else {
+			entry.MaxBlobsPerBlock = lastBlobs
+		}
+		entry, err = entryWithForkDigest(entry, b)
+		if err != nil {
+			return err
+		}
+		ns.entries[i] = entry
+		ns.index(entry)
+	}
+	return nil
+}
+
+func entryWithForkDigest(entry NetworkScheduleEntry, b *BeaconChainConfig) (NetworkScheduleEntry, error) {
+	root, err := computeForkDataRoot(entry.ForkVersion, b.GenesisValidatorsRoot)
+	if err != nil {
+		return entry, err
+	}
+	entry.ForkDigest = bytesutil.ToBytes4(root[:])
+	if entry.Epoch < b.FuluForkEpoch {
+		return entry, nil
+	}
+	if entry.MaxBlobsPerBlock > math.MaxUint32 {
+		return entry, fmt.Errorf("max blobs per block exceeds maximum uint32 value")
+	}
+	hb := make([]byte, 16)
+	binary.LittleEndian.PutUint64(hb[0:8], uint64(entry.Epoch))
+	binary.LittleEndian.PutUint64(hb[8:], uint64(entry.MaxBlobsPerBlock))
+	bpoHash := hash.Hash(hb)
+	entry.ForkDigest[0] = entry.ForkDigest[0] ^ bpoHash[0]
+	entry.ForkDigest[1] = entry.ForkDigest[1] ^ bpoHash[1]
+	entry.ForkDigest[2] = entry.ForkDigest[2] ^ bpoHash[2]
+	entry.ForkDigest[3] = entry.ForkDigest[3] ^ bpoHash[3]
+	return entry, nil
+}
+
+func initForkSchedule(b *BeaconChainConfig) *NetworkSchedule {
+	return newNetworkSchedule([]NetworkScheduleEntry{
+		{Epoch: b.GenesisEpoch, isFork: true, ForkVersion: [4]byte(b.GenesisForkVersion), VersionEnum: version.Phase0},
+		{Epoch: b.AltairForkEpoch, isFork: true, ForkVersion: [4]byte(b.AltairForkVersion), VersionEnum: version.Altair},
+		{Epoch: b.BellatrixForkEpoch, isFork: true, ForkVersion: [4]byte(b.BellatrixForkVersion), VersionEnum: version.Bellatrix},
+		{Epoch: b.CapellaForkEpoch, isFork: true, ForkVersion: [4]byte(b.CapellaForkVersion), VersionEnum: version.Capella},
+		{Epoch: b.DenebForkEpoch, isFork: true, ForkVersion: [4]byte(b.DenebForkVersion), MaxBlobsPerBlock: uint64(b.DeprecatedMaxBlobsPerBlock), VersionEnum: version.Deneb},
+		{Epoch: b.ElectraForkEpoch, isFork: true, ForkVersion: [4]byte(b.ElectraForkVersion), MaxBlobsPerBlock: uint64(b.DeprecatedMaxBlobsPerBlockElectra), VersionEnum: version.Electra},
+		{Epoch: b.FuluForkEpoch, isFork: true, ForkVersion: [4]byte(b.FuluForkVersion), VersionEnum: version.Fulu},
+	})
+}
+
+func initBPOSchedule(b *BeaconChainConfig) *NetworkSchedule {
+	sort.Slice(b.BlobSchedule, func(i, j int) bool {
+		return b.BlobSchedule[i].Epoch < b.BlobSchedule[j].Epoch
+	})
+	entries := make([]NetworkScheduleEntry, len(b.BlobSchedule))
+	for i := range b.BlobSchedule {
+		entries[i] = NetworkScheduleEntry(b.BlobSchedule[i])
+	}
+	return newNetworkSchedule(entries)
 }
 
 func configForkSchedule(b *BeaconChainConfig) map[[fieldparams.VersionLength]byte]primitives.Epoch {

config/params/config_utils_develop.go

@@ -22,6 +22,7 @@ func BeaconConfig() *BeaconChainConfig {
 // OverrideBeaconConfig(c). Any subsequent calls to params.BeaconConfig() will
 // return this new configuration.
 func OverrideBeaconConfig(c *BeaconChainConfig) {
+	c.InitializeForkSchedule()
 	cfgrw.Lock()
 	defer cfgrw.Unlock()
 	configs.active = c

config/params/config_utils_prod.go

@@ -16,6 +16,7 @@ func BeaconConfig() *BeaconChainConfig {
 // OverrideBeaconConfig(c). Any subsequent calls to params.BeaconConfig() will
 // return this new configuration.
 func OverrideBeaconConfig(c *BeaconChainConfig) {
+	c.InitializeForkSchedule()
 	configs.active = c
 }
 

config/params/errors.go

@@ -1,4 +1,4 @@
-package forks
+package params
 
 import "github.com/pkg/errors"
 

config/params/export_test.go

@@ -0,0 +1,3 @@
+package params
+
+var ComputeForkDataRoot = computeForkDataRoot

config/params/fork.go

@@ -0,0 +1,95 @@
+package params
+
+import (
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/pkg/errors"
+)
+
+// IsForkNextEpoch checks if an allotted fork is in the following epoch.
+func IsForkNextEpoch(currentEpoch primitives.Epoch) bool {
+	entry, ok := BeaconConfig().networkSchedule.activatedAt(currentEpoch + 1)
+	return ok && entry.isFork
+}
+
+// ForkDigestFromEpoch retrieves the fork digest from the current schedule determined
+// by the provided epoch.
+func ForkDigestFromEpoch(epoch primitives.Epoch) [4]byte {
+	return BeaconConfig().networkSchedule.ForEpoch(epoch).ForkDigest
+}
+
+// CreateForkDigest creates a fork digest from a genesis time and genesis
+// validators root, utilizing the current slot to determine
+// the active fork version in the node.
+func ForkDigest(epoch primitives.Epoch) [4]byte {
+	return BeaconConfig().networkSchedule.ForEpoch(epoch).ForkDigest
+}
+
+func computeForkDataRoot(version [4]byte, root [32]byte) ([32]byte, error) {
+	r, err := (&ethpb.ForkData{
+		CurrentVersion:        version[:],
+		GenesisValidatorsRoot: root[:],
+	}).HashTreeRoot()
+	if err != nil {
+		return [32]byte{}, nil
+	}
+	return r, nil
+}
+
+// Fork returns the fork version for the given epoch.
+func Fork(epoch primitives.Epoch) (*ethpb.Fork, error) {
+	cfg := BeaconConfig()
+	return ForkFromConfig(cfg, epoch), nil
+}
+
+func ForkFromConfig(cfg *BeaconChainConfig, epoch primitives.Epoch) *ethpb.Fork {
+	current := cfg.networkSchedule.ForEpoch(epoch)
+	previous := current
+	if current.Epoch > 0 {
+		previous = BeaconConfig().networkSchedule.ForEpoch(current.Epoch - 1)
+	}
+	return &ethpb.Fork{
+		PreviousVersion: previous.ForkVersion[:],
+		CurrentVersion:  current.ForkVersion[:],
+		Epoch:           current.Epoch,
+	}
+}
+
+// RetrieveForkDataFromDigest performs the inverse, where it tries to determine the fork version
+// and epoch from a provided digest by looping through our current fork schedule.
+func ForkDataFromDigest(digest [4]byte) ([4]byte, primitives.Epoch, error) {
+	cfg := BeaconConfig()
+	entry, ok := cfg.networkSchedule.byDigest[digest]
+	if !ok {
+		return [4]byte{}, 0, errors.Errorf("no fork exists for a digest of %#x", digest)
+	}
+	return entry.ForkVersion, entry.Epoch, nil
+}
+
+// NextForkData retrieves the next fork data according to the
+// provided current epoch.
+func NextForkData(epoch primitives.Epoch) ([4]byte, primitives.Epoch) {
+	entry := BeaconConfig().networkSchedule.Next(epoch)
+	return entry.ForkVersion, entry.Epoch
+}
+
+func SortedNetworkScheduleEntries() []NetworkScheduleEntry {
+	return BeaconConfig().networkSchedule.entries
+}
+
+func SortedForkSchedule() []NetworkScheduleEntry {
+	entries := BeaconConfig().networkSchedule.entries
+	schedule := make([]NetworkScheduleEntry, 0, len(entries))
+	for _, entry := range entries {
+		if entry.isFork {
+			schedule = append(schedule, entry)
+		}
+	}
+	return schedule
+}
+
+// LastForkEpoch returns the last valid fork epoch that exists in our
+// fork schedule.
+func LastForkEpoch() primitives.Epoch {
+	return BeaconConfig().networkSchedule.LastFork().Epoch
+}

config/params/fork_test.go

@@ -0,0 +1,165 @@
+package params_test
+
+import (
+	"reflect"
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v6/config/params"
+	"github.com/OffchainLabs/prysm/v6/consensus-types/primitives"
+	ethpb "github.com/OffchainLabs/prysm/v6/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v6/testing/assert"
+	"github.com/OffchainLabs/prysm/v6/testing/require"
+)
+
+func TestFork(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+
+	tests := []struct {
+		name        string
+		targetEpoch primitives.Epoch
+		want        *ethpb.Fork
+		wantErr     bool
+		setConfg    func()
+	}{
+		{
+			name:        "genesis fork",
+			targetEpoch: 0,
+			want: &ethpb.Fork{
+				Epoch:           cfg.GenesisEpoch,
+				CurrentVersion:  cfg.GenesisForkVersion,
+				PreviousVersion: cfg.GenesisForkVersion,
+			},
+		},
+		{
+			name:        "altair on fork",
+			targetEpoch: cfg.AltairForkEpoch,
+			want: &ethpb.Fork{
+				Epoch:           cfg.AltairForkEpoch,
+				CurrentVersion:  cfg.AltairForkVersion,
+				PreviousVersion: cfg.GenesisForkVersion,
+			},
+		},
+		{
+			name:        "altair post fork",
+			targetEpoch: cfg.CapellaForkEpoch + 1,
+			want: &ethpb.Fork{
+				Epoch:           cfg.CapellaForkEpoch,
+				CurrentVersion:  cfg.CapellaForkVersion,
+				PreviousVersion: cfg.BellatrixForkVersion,
+			},
+		},
+		{
+			name:        "3 forks, pre-fork",
+			targetEpoch: cfg.ElectraForkEpoch - 1,
+			want: &ethpb.Fork{
+				Epoch:           cfg.DenebForkEpoch,
+				CurrentVersion:  cfg.DenebForkVersion,
+				PreviousVersion: cfg.CapellaForkVersion,
+			},
+		},
+		{
+			name:        "3 forks, on fork",
+			targetEpoch: cfg.ElectraForkEpoch,
+			want: &ethpb.Fork{
+				Epoch:           cfg.ElectraForkEpoch,
+				CurrentVersion:  cfg.ElectraForkVersion,
+				PreviousVersion: cfg.DenebForkVersion,
+			},
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			copied := cfg.Copy()
+			params.OverrideBeaconConfig(copied)
+			got, err := params.Fork(tt.targetEpoch)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("Fork() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !reflect.DeepEqual(got, tt.want) {
+				t.Errorf("Fork() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestRetrieveForkDataFromDigest(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	digest := params.ForkDigest(params.BeaconConfig().AltairForkEpoch)
+	version, epoch, err := params.ForkDataFromDigest(digest)
+	require.NoError(t, err)
+	require.Equal(t, [4]byte(params.BeaconConfig().AltairForkVersion), version)
+	require.Equal(t, params.BeaconConfig().AltairForkEpoch, epoch)
+}
+
+func TestIsForkNextEpoch(t *testing.T) {
+	// at
+	assert.Equal(t, false, params.IsForkNextEpoch(params.BeaconConfig().ElectraForkEpoch))
+	// just before
+	assert.Equal(t, true, params.IsForkNextEpoch(params.BeaconConfig().ElectraForkEpoch-1))
+	// just after
+	assert.Equal(t, false, params.IsForkNextEpoch(params.BeaconConfig().ElectraForkEpoch+1))
+}
+
+func TestNextForkData(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	tests := []struct {
+		name              string
+		setConfg          func()
+		currEpoch         primitives.Epoch
+		wantedForkVersion [4]byte
+		wantedEpoch       primitives.Epoch
+	}{
+		{
+			name:              "genesis",
+			currEpoch:         0,
+			wantedForkVersion: [4]byte(cfg.AltairForkVersion),
+			wantedEpoch:       cfg.AltairForkEpoch,
+		},
+		{
+			name:              "altair pre-fork",
+			currEpoch:         cfg.AltairForkEpoch - 1,
+			wantedForkVersion: [4]byte(cfg.AltairForkVersion),
+			wantedEpoch:       cfg.AltairForkEpoch,
+		},
+		{
+			name:              "altair on fork",
+			currEpoch:         cfg.AltairForkEpoch,
+			wantedForkVersion: [4]byte(cfg.BellatrixForkVersion),
+			wantedEpoch:       cfg.BellatrixForkEpoch,
+		},
+
+		{
+			name:              "altair post fork",
+			currEpoch:         cfg.AltairForkEpoch + 1,
+			wantedForkVersion: [4]byte(cfg.BellatrixForkVersion),
+			wantedEpoch:       cfg.BellatrixForkEpoch,
+		},
+		{
+			name:              "electra post fork",
+			currEpoch:         cfg.ElectraForkEpoch + 1,
+			wantedForkVersion: [4]byte(cfg.ElectraForkVersion),
+			wantedEpoch:       cfg.ElectraForkEpoch,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			params.OverrideBeaconConfig(cfg.Copy())
+			fVersion, fEpoch := params.NextForkData(tt.currEpoch)
+			if fVersion != tt.wantedForkVersion {
+				t.Errorf("NextForkData() fork version = %v, want %v", fVersion, tt.wantedForkVersion)
+			}
+			if fEpoch != tt.wantedEpoch {
+				t.Errorf("NextForkData() fork epoch = %v, want %v", fEpoch, tt.wantedEpoch)
+			}
+		})
+	}
+}
+
+func TestLastForkEpoch(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig().Copy()
+	require.Equal(t, cfg.ElectraForkEpoch, params.LastForkEpoch())
+}

config/params/mainnet_config.go

@@ -197,7 +197,7 @@ var mainnetBeaconConfig = &BeaconChainConfig{
 	BeaconStateCapellaFieldCount:   28,
 	BeaconStateDenebFieldCount:     28,
 	BeaconStateElectraFieldCount:   37,
-	BeaconStateFuluFieldCount:      37,
+	BeaconStateFuluFieldCount:      38,
 
 	// Slasher related values.
 	WeakSubjectivityPeriod:          54000,
@@ -340,10 +340,7 @@ var mainnetBeaconConfig = &BeaconChainConfig{
 	SubnetsPerNode:                  2,
 	NodeIdBits:                      256,
 
-	BlobSchedule: []BlobScheduleEntry{
-		{Epoch: 269568, MaxBlobsPerBlock: 6},
-		{Epoch: 364032, MaxBlobsPerBlock: 9},
-	},
+	BlobSchedule: []BlobScheduleEntry{},
 }
 
 // MainnetTestConfig provides a version of the mainnet config that has a different name

config/params/minimal_config.go

@@ -127,10 +127,7 @@ func MinimalSpecConfig() *BeaconChainConfig {
 	minimalConfig.ConfigName = MinimalName
 	minimalConfig.PresetBase = "minimal"
 
-	minimalConfig.BlobSchedule = []BlobScheduleEntry{
-		{Epoch: 18446744073709551615, MaxBlobsPerBlock: 6},
-		{Epoch: 18446744073709551615, MaxBlobsPerBlock: 9},
-	}
+	minimalConfig.BlobSchedule = make([]BlobScheduleEntry, 0)
 
 	minimalConfig.InitializeForkSchedule()
 	return minimalConfig

config/params/testnet_holesky_config.go

@@ -46,10 +46,7 @@ func HoleskyConfig() *BeaconChainConfig {
 	cfg.TerminalTotalDifficulty = "0"
 	cfg.DepositContractAddress = "0x4242424242424242424242424242424242424242"
 	cfg.EjectionBalance = 28000000000
-	cfg.BlobSchedule = []BlobScheduleEntry{
-		{Epoch: 29696, MaxBlobsPerBlock: 6},
-		{Epoch: 115968, MaxBlobsPerBlock: 9},
-	}
+	cfg.BlobSchedule = []BlobScheduleEntry{}
 	cfg.InitializeForkSchedule()
 	return cfg
 }