Return on error.

Additional electra support.
Support for custom spec.
2026-01-10 14:37:57 -05:00 · 2024-05-27 09:34:06 +01:00 · 2024-05-15 00:06:52 +01:00 · 2024-05-14 23:14:46 +01:00
76 changed files with 1308 additions and 1029 deletions
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -1,24 +1,23 @@
-name: 'golangci-lint'
+name: golangci-lint
 on:
-  pull_request:
  push:
+    tags:
+      - v*
    branches:
-      - 'master'
-  workflow_dispatch:
-
+    - master
+  pull_request:
 permissions:
-  contents: 'read'
-
+  contents: read
 jobs:
  golangci:
-    name: 'lint'
-    runs-on: 'ubuntu-24.04'
+    name: lint
+    runs-on: ubuntu-latest
    steps:
-      - uses: 'actions/setup-go@v5'
+      - uses: actions/setup-go@v4
        with:
-          cache: false
-          go-version: '^1.22'
-      - uses: 'actions/checkout@v4'
-      - uses: 'golangci/golangci-lint-action@v6'
+          go-version: '^1.21'
+      - uses: actions/checkout@v4
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v4
        with:
          only-new-issues: true
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -3,9 +3,8 @@ name: Release
 on:
  push:
    tags:
-      - 'v*'
-      - 't*'
-  workflow_dispatch:
+    - 'v*'
+    - 't*'

 jobs:
  # Set variables that will be available to all builds.
@@ -45,10 +44,9 @@ jobs:
    needs: [create_release, env_vars]
    steps:
      - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v4
        with:
-          cache: false
-          go-version: '^1.22'
+          go-version: '^1.21'

      - name: Check out repository into the Go module directory
        uses: actions/checkout@v4
@@ -121,10 +119,9 @@ jobs:
    needs: [create_release, env_vars]
    steps:
      - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v4
        with:
-          cache: false
-          go-version: '^1.22'
+          go-version: '^1.21'

      - name: Check out repository into the Go module directory
        uses: actions/checkout@v4
@@ -167,10 +164,9 @@ jobs:
    needs: [create_release, env_vars]
    steps:
      - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v4
        with:
-          cache: false
-          go-version: '^1.22'
+          go-version: '^1.21'

      - name: Check out repository into the Go module directory
        uses: actions/checkout@v4
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,18 +1,15 @@
 name: test
 on:
-  pull_request:
  push:
    branches:
-      - master
-  workflow_dispatch:
-
+    - master
+  pull_request:
 jobs:
  test:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v4
        with:
-          cache: false
-          go-version: '^1.22'
+          go-version: '^1.21'
      - uses: actions/checkout@v4
-      - uses: n8maninger/action-golang-test@v2
+      - uses: n8maninger/action-golang-test@v1
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -106,11 +106,6 @@ output:

 # All available settings of specific linters.
 linters-settings:
-  gosec:
-    excludes:
-      # Flags for potentially-unsafe casting of ints, but generates a lot of false positives.
-      - 'G115'
-
  lll:
    line-length: 132

@@ -133,13 +128,15 @@ linters:
  disable:
    - contextcheck
    - cyclop
+    - deadcode
    - depguard
    - dupl
    - err113
    - errorlint
+    - execinquery
    - exhaustive
+    - exhaustivestruct
    - exhaustruct
-    - exportloopref
    - forbidigo
    - forcetypeassert
    - funlen
@@ -149,20 +146,29 @@ linters:
    - gocognit
    - goconst
    - goheader
+    - golint
+    - gomnd
+    - ifshort
+    - interfacer
    - ireturn
    - lll
    - maintidx
+    - maligned
    - mnd
    - musttag
    - nestif
    - nilnil
    - nlreturn
    - nolintlint
+    - nosnakecase
    - perfsprint
    - promlinter
    - rowserrcheck
+    - scopelint
    - sqlclosecheck
+    - structcheck
    - unparam
+    - varcheck
    - varnamelen
    - wastedassign
    - wrapcheck
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,23 +1,4 @@
-1.36.2:
-  - avoid crash when signing and verifing signatures using keys rather than accounts
-
-1.36.1:
-  - more JSON data for epoch summary
-  - fix crash when block ifno had no blobs
-
-1.36.0:
-  - support keystore wallets
-
-1.35.6:
-  - provide more JSON data in "epoch summary"
-
-1.35.5:
-  - allow keystore to be output to the console
-
-1.35.4:
-  - provide consensus and execution client info in block info output 
-
-1.35.3:
+dev:
  - provide better error message on context deadlline exceeded
  - update launchpad output to match latest version
  - add deposit contract address to "chain info"
--- a/2
+++ b/2
@@ -1,4 +1,4 @@
-FROM golang:1.22-bookworm as builder
+FROM golang:1.21-bookworm as builder

 WORKDIR /app

--- a/README.md
+++ b/README.md
@@ -151,13 +151,9 @@ Amazon S3-compatible stores have additional options available, which can be conf
 {
  "stores": {
    "s3": {
-      "region": "us-west-1",
-      "bucket": "my-s3-store",
-      "path": "/wallets",
-      "credentials": {
-        "id": "ABCDEF123",
-        "secret": "XXXXXXXXX"
-      }
+      "bucket":"mybucketname",
+      "path":"path/in/bucket",
+      "passphrase":"secret"
    }
  }
 }
--- a/cmd/account/derive/input.go
+++ b/cmd/account/derive/input.go
@@ -22,7 +22,6 @@ import (

 type dataIn struct {
 	quiet bool
-	json  bool
 	// Derivation information.
 	mnemonic string
 	path     string
@@ -38,9 +37,6 @@ func input(_ context.Context) (*dataIn, error) {
 	// Quiet.
 	data.quiet = viper.GetBool("quiet")

-	// JSON.
-	data.json = viper.GetBool("json")
-
 	// Mnemonic.
 	if viper.GetString("mnemonic") == "" {
 		return nil, errors.New("mnemonic is required")
--- a/cmd/account/derive/output.go
+++ b/cmd/account/derive/output.go
@@ -31,7 +31,6 @@ import (
 )

 type dataOut struct {
-	json                      bool
 	showPrivateKey            bool
 	showWithdrawalCredentials bool
 	generateKeystore          bool
@@ -95,14 +94,10 @@ func outputKeystore(_ context.Context, data *dataOut) (string, error) {
 		return "", errors.Wrap(err, "failed to marshal keystore JSON")
 	}

-	if data.json {
-		fmt.Fprintf(os.Stdout, "%s\n", string(out))
-	} else {
-		keystoreFilename := fmt.Sprintf("keystore-%s-%d.json", strings.ReplaceAll(data.path, "/", "_"), time.Now().Unix())
+	keystoreFilename := fmt.Sprintf("keystore-%s-%d.json", strings.ReplaceAll(data.path, "/", "_"), time.Now().Unix())

-		if err := os.WriteFile(keystoreFilename, out, 0o600); err != nil {
-			return "", errors.Wrap(err, fmt.Sprintf("failed to write %s", keystoreFilename))
-		}
+	if err := os.WriteFile(keystoreFilename, out, 0o600); err != nil {
+		return "", errors.Wrap(err, fmt.Sprintf("failed to write %s", keystoreFilename))
 	}
 	return "", nil
 }
--- a/cmd/account/derive/process.go
+++ b/cmd/account/derive/process.go
@@ -38,7 +38,6 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	}

 	results := &dataOut{
-		json:                      data.json,
 		showPrivateKey:            data.showPrivateKey,
 		showWithdrawalCredentials: data.showWithdrawalCredentials,
 		generateKeystore:          data.generateKeystore,
--- a/cmd/accountderive.go
+++ b/cmd/accountderive.go
@@ -50,7 +50,6 @@ func init() {
 	accountDeriveCmd.Flags().Bool("show-private-key", false, "show private key for derived account")
 	accountDeriveCmd.Flags().Bool("show-withdrawal-credentials", false, "show withdrawal credentials for derived account")
 	accountDeriveCmd.Flags().Bool("generate-keystore", false, "generate a keystore for the derived account")
-	accountDeriveCmd.Flags().Bool("json", false, "display the JSON keystore for the derived account on stdout")
 }

 func accountDeriveBindings(cmd *cobra.Command) {
@@ -63,7 +62,4 @@ func accountDeriveBindings(cmd *cobra.Command) {
 	if err := viper.BindPFlag("generate-keystore", cmd.Flags().Lookup("generate-keystore")); err != nil {
 		panic(err)
 	}
-	if err := viper.BindPFlag("json", cmd.Flags().Lookup("json")); err != nil {
-		panic(err)
-	}
 }
--- a/cmd/accountimport.go
+++ b/cmd/accountimport.go
@@ -24,7 +24,7 @@ import (
 var accountImportCmd = &cobra.Command{
 	Use:   "import",
 	Short: "Import an account",
-	Long: `Import an account from its private key.  For example:
+	Long: `Import an account from its private key or keystore.  For example:

    ethdo account import --account="primary/testing" --key="0x..." --passphrase="my secret"

--- a/cmd/attester/duties/input.go
+++ b/cmd/attester/duties/input.go
@@ -61,10 +61,11 @@ func input(ctx context.Context) (*dataIn, error) {
 	// Ethereum 2 client.
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       viper.GetString("connection"),
-		Timeout:       viper.GetDuration("timeout"),
-		AllowInsecure: viper.GetBool("allow-insecure-connections"),
-		LogFallback:   !data.quiet,
+		Address:           viper.GetString("connection"),
+		Timeout:           viper.GetDuration("timeout"),
+		AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+		CustomSpecSupport: viper.GetBool("custom-spec"),
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, err
--- a/cmd/attester/inclusion/input.go
+++ b/cmd/attester/inclusion/input.go
@@ -58,10 +58,11 @@ func input(ctx context.Context) (*dataIn, error) {
 	// Ethereum 2 client.
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       viper.GetString("connection"),
-		Timeout:       viper.GetDuration("timeout"),
-		AllowInsecure: viper.GetBool("allow-insecure-connections"),
-		LogFallback:   !data.quiet,
+		Address:           viper.GetString("connection"),
+		Timeout:           viper.GetDuration("timeout"),
+		AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+		CustomSpecSupport: viper.GetBool("custom-spec"),
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, err
--- a/cmd/attester/inclusion/process.go
+++ b/cmd/attester/inclusion/process.go
@@ -93,23 +93,33 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 			return nil, errors.Wrap(err, "failed to obtain block attestations")
 		}
 		for i, attestation := range attestations {
-			if attestation.Data.Slot == duty.Slot &&
-				attestation.Data.Index == duty.CommitteeIndex &&
-				attestation.AggregationBits.BitAt(duty.ValidatorCommitteeIndex) {
+			attestationData, err := attestation.Data()
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to obtain attestation data")
+			}
+			aggregationBits, err := attestation.AggregationBits()
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to obtain attestation aggregation bits")
+			}
+
+			if attestationData.Slot == duty.Slot &&
+				attestationData.Index == duty.CommitteeIndex &&
+				aggregationBits.BitAt(duty.ValidatorCommitteeIndex) {
 				headCorrect := false
 				targetCorrect := false
 				if data.verbose {
-					headCorrect, err = calcHeadCorrect(ctx, data, attestation)
+					headCorrect, err = calcHeadCorrect(ctx, data, attestationData)
 					if err != nil {
 						return nil, errors.Wrap(err, "failed to obtain head correct result")
 					}
-					targetCorrect, err = calcTargetCorrect(ctx, data, attestation)
+					targetCorrect, err = calcTargetCorrect(ctx, data, attestationData)
 					if err != nil {
 						return nil, errors.Wrap(err, "failed to obtain target correct result")
 					}
 				}
 				results.found = true
-				results.attestation = attestation
+				// TODO fix.
+				// results.attestation = attestation
 				results.slot = slot
 				results.attestationIndex = uint64(i)
 				results.inclusionDelay = slot - duty.Slot
@@ -128,8 +138,8 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	return results, nil
 }

-func calcHeadCorrect(ctx context.Context, data *dataIn, attestation *phase0.Attestation) (bool, error) {
-	slot := attestation.Data.Slot
+func calcHeadCorrect(ctx context.Context, data *dataIn, attestationData *phase0.AttestationData) (bool, error) {
+	slot := attestationData.Slot
 	for {
 		response, err := data.eth2Client.(eth2client.BeaconBlockHeadersProvider).BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{
 			Block: fmt.Sprintf("%d", slot),
@@ -149,13 +159,13 @@ func calcHeadCorrect(ctx context.Context, data *dataIn, attestation *phase0.Atte
 			slot--
 			continue
 		}
-		return bytes.Equal(response.Data.Root[:], attestation.Data.BeaconBlockRoot[:]), nil
+		return bytes.Equal(response.Data.Root[:], attestationData.BeaconBlockRoot[:]), nil
 	}
 }

-func calcTargetCorrect(ctx context.Context, data *dataIn, attestation *phase0.Attestation) (bool, error) {
+func calcTargetCorrect(ctx context.Context, data *dataIn, attestationData *phase0.AttestationData) (bool, error) {
 	// Start with first slot of the target epoch.
-	slot := data.chainTime.FirstSlotOfEpoch(attestation.Data.Target.Epoch)
+	slot := data.chainTime.FirstSlotOfEpoch(attestationData.Target.Epoch)
 	for {
 		response, err := data.eth2Client.(eth2client.BeaconBlockHeadersProvider).BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{
 			Block: fmt.Sprintf("%d", slot),
@@ -175,7 +185,7 @@ func calcTargetCorrect(ctx context.Context, data *dataIn, attestation *phase0.At
 			slot--
 			continue
 		}
-		return bytes.Equal(response.Data.Root[:], attestation.Data.Target.Root[:]), nil
+		return bytes.Equal(response.Data.Root[:], attestationData.Target.Root[:]), nil
 	}
 }

--- a/cmd/block/analyze/command.go
+++ b/cmd/block/analyze/command.go
@@ -34,6 +34,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Operation.
 	blockID    string
@@ -124,6 +125,7 @@ func newCommand(_ context.Context) (*command, error) {

 	c.connection = viper.GetString("connection")
 	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+	c.customSpecSupport = viper.GetBool("custom-spec")

 	c.blockID = viper.GetString("blockid")
 	c.stream = viper.GetBool("stream")
--- a/cmd/block/analyze/process.go
+++ b/cmd/block/analyze/process.go
@@ -17,11 +17,11 @@ import (
 	"bytes"
 	"context"
 	"fmt"
-	"net/http"

 	eth2client "github.com/attestantio/go-eth2-client"
 	"github.com/attestantio/go-eth2-client/api"
 	"github.com/attestantio/go-eth2-client/spec"
+	"github.com/attestantio/go-eth2-client/spec/electra"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/go-bitfield"
@@ -40,7 +40,7 @@ func (c *command) process(ctx context.Context) error {
 	})
 	if err != nil {
 		var apiError *api.Error
-		if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+		if errors.As(err, &apiError) && apiError.StatusCode == 404 {
 			return errors.New("empty beacon block")
 		}
 		return errors.Wrap(err, "failed to obtain beacon block")
@@ -63,8 +63,12 @@ func (c *command) process(ctx context.Context) error {
 	// Calculate how many parents we need to fetch.
 	minSlot := slot
 	for _, attestation := range attestations {
-		if attestation.Data.Slot < minSlot {
-			minSlot = attestation.Data.Slot
+		attestationData, err := attestation.Data()
+		if err != nil {
+			continue
+		}
+		if attestationData.Slot < minSlot {
+			minSlot = attestationData.Slot
 		}
 	}
 	if c.debug {
@@ -103,72 +107,27 @@ func (c *command) analyzeAttestations(ctx context.Context, block *spec.Versioned
 		if c.debug {
 			fmt.Printf("Processing attestation %d\n", i)
 		}
-		analysis := &attestationAnalysis{
-			Head:     attestation.Data.BeaconBlockRoot,
-			Target:   attestation.Data.Target.Root,
-			Distance: int(slot - attestation.Data.Slot),
-		}

-		root, err := attestation.HashTreeRoot()
+		var analysis *attestationAnalysis
+		switch attestation.Version {
+		case spec.DataVersionPhase0:
+			analysis, err = c.phase0Analysis(ctx, slot, attestation.Phase0, blockVotes, spec.DataVersionPhase0)
+		case spec.DataVersionAltair:
+			analysis, err = c.phase0Analysis(ctx, slot, attestation.Altair, blockVotes, spec.DataVersionAltair)
+		case spec.DataVersionBellatrix:
+			analysis, err = c.phase0Analysis(ctx, slot, attestation.Bellatrix, blockVotes, spec.DataVersionBellatrix)
+		case spec.DataVersionCapella:
+			analysis, err = c.phase0Analysis(ctx, slot, attestation.Capella, blockVotes, spec.DataVersionCapella)
+		case spec.DataVersionDeneb:
+			analysis, err = c.phase0Analysis(ctx, slot, attestation.Deneb, blockVotes, spec.DataVersionDeneb)
+		case spec.DataVersionElectra:
+			analysis, err = c.electraAnalysis(ctx, slot, attestation.Electra, blockVotes, spec.DataVersionElectra)
+		default:
+			return fmt.Errorf("unknown version %s", attestation.Version)
+		}
 		if err != nil {
 			return err
 		}
-		if info, exists := c.priorAttestations[fmt.Sprintf("%#x", root)]; exists {
-			analysis.Duplicate = info
-		} else {
-			data := attestation.Data
-			_, exists := blockVotes[data.Slot]
-			if !exists {
-				blockVotes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
-			}
-			_, exists = blockVotes[data.Slot][data.Index]
-			if !exists {
-				blockVotes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
-			}
-
-			// Count new votes.
-			analysis.PossibleVotes = int(attestation.AggregationBits.Len())
-			for j := range attestation.AggregationBits.Len() {
-				if attestation.AggregationBits.BitAt(j) {
-					analysis.Votes++
-					if blockVotes[data.Slot][data.Index].BitAt(j) {
-						// Already attested to in this block; skip.
-						continue
-					}
-					if c.votes[data.Slot][data.Index].BitAt(j) {
-						// Already attested to in a previous block; skip.
-						continue
-					}
-					analysis.NewVotes++
-					blockVotes[data.Slot][data.Index].SetBitAt(j, true)
-				}
-			}
-			// Calculate head correct.
-			var err error
-			analysis.HeadCorrect, err = c.calcHeadCorrect(ctx, attestation)
-			if err != nil {
-				return err
-			}
-
-			// Calculate head timely.
-			analysis.HeadTimely = analysis.HeadCorrect && attestation.Data.Slot == slot-1
-
-			// Calculate source timely.
-			analysis.SourceTimely = attestation.Data.Slot >= slot-5
-
-			// Calculate target correct.
-			analysis.TargetCorrect, err = c.calcTargetCorrect(ctx, attestation)
-			if err != nil {
-				return err
-			}
-
-			// Calculate target timely.
-			if block.Version < spec.DataVersionDeneb {
-				analysis.TargetTimely = attestation.Data.Slot >= slot-32
-			} else {
-				analysis.TargetTimely = true
-			}
-		}

 		// Calculate score and value.
 		if analysis.TargetCorrect && analysis.TargetTimely {
@@ -189,6 +148,165 @@ func (c *command) analyzeAttestations(ctx context.Context, block *spec.Versioned
 	return nil
 }

+func (c *command) phase0Analysis(ctx context.Context,
+	slot phase0.Slot,
+	attestation *phase0.Attestation,
+	blockVotes map[phase0.Slot]map[phase0.CommitteeIndex]bitfield.Bitlist,
+	version spec.DataVersion,
+) (
+	*attestationAnalysis,
+	error,
+) {
+	analysis := &attestationAnalysis{
+		Head:     attestation.Data.BeaconBlockRoot,
+		Target:   attestation.Data.Target.Root,
+		Distance: int(slot - attestation.Data.Slot),
+	}
+
+	// TODO.
+	root, err := attestation.HashTreeRoot()
+	if err != nil {
+		return nil, err
+	}
+	if info, exists := c.priorAttestations[fmt.Sprintf("%#x", root)]; exists {
+		analysis.Duplicate = info
+	} else {
+		data := attestation.Data
+		_, exists := blockVotes[data.Slot]
+		if !exists {
+			blockVotes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+		}
+		_, exists = blockVotes[data.Slot][data.Index]
+		if !exists {
+			blockVotes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
+		}
+
+		// Count new votes.
+		analysis.PossibleVotes = int(attestation.AggregationBits.Len())
+		for j := uint64(0); j < attestation.AggregationBits.Len(); j++ {
+			if attestation.AggregationBits.BitAt(j) {
+				analysis.Votes++
+				if blockVotes[data.Slot][data.Index].BitAt(j) {
+					// Already attested to in this block; skip.
+					continue
+				}
+				if c.votes[data.Slot][data.Index].BitAt(j) {
+					// Already attested to in a previous block; skip.
+					continue
+				}
+				analysis.NewVotes++
+				blockVotes[data.Slot][data.Index].SetBitAt(j, true)
+			}
+		}
+		// Calculate head correct.
+		analysis.HeadCorrect, err = c.calcHeadCorrect(ctx, attestation)
+		if err != nil {
+			return nil, err
+		}
+
+		// Calculate head timely.
+		analysis.HeadTimely = analysis.HeadCorrect && attestation.Data.Slot == slot-1
+
+		// Calculate source timely.
+		analysis.SourceTimely = attestation.Data.Slot >= slot-5
+
+		// Calculate target correct.
+		analysis.TargetCorrect, err = c.calcTargetCorrect(ctx, attestation)
+		if err != nil {
+			return nil, err
+		}
+
+		// Calculate target timely.
+		if version < spec.DataVersionDeneb {
+			analysis.TargetTimely = attestation.Data.Slot >= slot-32
+		} else {
+			analysis.TargetTimely = true
+		}
+	}
+
+	return analysis, nil
+}
+
+func (c *command) electraAnalysis(ctx context.Context,
+	slot phase0.Slot,
+	attestation *electra.Attestation,
+	blockVotes map[phase0.Slot]map[phase0.CommitteeIndex]bitfield.Bitlist,
+	version spec.DataVersion,
+) (
+	*attestationAnalysis,
+	error,
+) {
+	analysis := &attestationAnalysis{
+		Head:     attestation.Data.BeaconBlockRoot,
+		Target:   attestation.Data.Target.Root,
+		Distance: int(slot - attestation.Data.Slot),
+	}
+
+	// TODO.
+	root, err := attestation.HashTreeRoot()
+	if err != nil {
+		return nil, err
+	}
+	if info, exists := c.priorAttestations[fmt.Sprintf("%#x", root)]; exists {
+		analysis.Duplicate = info
+	} else {
+		data := attestation.Data
+		_, exists := blockVotes[data.Slot]
+		if !exists {
+			blockVotes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+		}
+		_, exists = blockVotes[data.Slot][data.Index]
+		if !exists {
+			blockVotes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
+		}
+
+		// Count new votes.
+		analysis.PossibleVotes = int(attestation.AggregationBits.Len())
+		for j := uint64(0); j < attestation.AggregationBits.Len(); j++ {
+			if attestation.AggregationBits.BitAt(j) {
+				analysis.Votes++
+				if blockVotes[data.Slot][data.Index].BitAt(j) {
+					// Already attested to in this block; skip.
+					continue
+				}
+				if c.votes[data.Slot][data.Index].BitAt(j) {
+					// Already attested to in a previous block; skip.
+					continue
+				}
+				analysis.NewVotes++
+				blockVotes[data.Slot][data.Index].SetBitAt(j, true)
+			}
+		}
+		// Calculate head correct.
+		var err error
+		analysis.HeadCorrect, err = c.calcElectraHeadCorrect(ctx, attestation)
+		if err != nil {
+			return nil, err
+		}
+
+		// Calculate head timely.
+		analysis.HeadTimely = analysis.HeadCorrect && attestation.Data.Slot == slot-1
+
+		// Calculate source timely.
+		analysis.SourceTimely = attestation.Data.Slot >= slot-5
+
+		// Calculate target correct.
+		analysis.TargetCorrect, err = c.calcElectraTargetCorrect(ctx, attestation)
+		if err != nil {
+			return nil, err
+		}
+
+		// Calculate target timely.
+		if version < spec.DataVersionDeneb {
+			analysis.TargetTimely = attestation.Data.Slot >= slot-32
+		} else {
+			analysis.TargetTimely = true
+		}
+	}
+
+	return analysis, nil
+}
+
 func (c *command) fetchParents(ctx context.Context, block *spec.VersionedSignedBeaconBlock, minSlot phase0.Slot) error {
 	parentRoot, err := block.ParentRoot()
 	if err != nil {
@@ -212,7 +330,7 @@ func (c *command) fetchParents(ctx context.Context, block *spec.VersionedSignedB
 	})
 	if err != nil {
 		var apiError *api.Error
-		if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+		if errors.As(err, &apiError) && apiError.StatusCode == 404 {
 			return errors.New("empty beacon block")
 		}
 		return err
@@ -238,10 +356,10 @@ func (c *command) fetchParents(ctx context.Context, block *spec.VersionedSignedB
 }

 func (c *command) processParentBlock(_ context.Context, block *spec.VersionedSignedBeaconBlock) error {
-	attestations, err := block.Attestations()
-	if err != nil {
-		return err
-	}
+	//	attestations, err := block.Attestations()
+	//	if err != nil {
+	//		return err
+	//	}
 	slot, err := block.Slot()
 	if err != nil {
 		return err
@@ -250,31 +368,40 @@ func (c *command) processParentBlock(_ context.Context, block *spec.VersionedSig
 		fmt.Printf("Processing block %d\n", slot)
 	}

-	for i, attestation := range attestations {
-		root, err := attestation.HashTreeRoot()
-		if err != nil {
-			return err
-		}
-		c.priorAttestations[fmt.Sprintf("%#x", root)] = &attestationData{
-			Block: slot,
-			Index: i,
-		}
+	// TODO reinstate.
+	// for i, attestation := range attestations {
+	//	root, err := attestation.HashTreeRoot()
+	//	if err != nil {
+	//		return err
+	//	}
+	//	c.priorAttestations[fmt.Sprintf("%#x", root)] = &attestationData{
+	//		Block: slot,
+	//		Index: i,
+	//	}

-		data := attestation.Data
-		_, exists := c.votes[data.Slot]
-		if !exists {
-			c.votes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
-		}
-		_, exists = c.votes[data.Slot][data.Index]
-		if !exists {
-			c.votes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
-		}
-		for j := range attestation.AggregationBits.Len() {
-			if attestation.AggregationBits.BitAt(j) {
-				c.votes[data.Slot][data.Index].SetBitAt(j, true)
-			}
-		}
-	}
+	//	data, err := attestation.Data()
+	//	if err != nil {
+	//		return err
+	//	}
+	//	aggregationBits, err := attestation.AggregationBits()
+	//	if err != nil {
+	//		return err
+	//	}
+
+	//	_, exists := c.votes[data.Slot]
+	//	if !exists {
+	//		c.votes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+	//	}
+	//	_, exists = c.votes[data.Slot][data.Index]
+	//	if !exists {
+	//		c.votes[data.Slot][data.Index] = bitfield.NewBitlist(aggregationBits.Len())
+	//	}
+	//	for j := uint64(0); j < aggregationBits.Len(); j++ {
+	//		if aggregationBits.BitAt(j) {
+	//			c.votes[data.Slot][data.Index].SetBitAt(j, true)
+	//		}
+	//	}
+	//}

 	return nil
 }
@@ -284,10 +411,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
@@ -395,7 +523,7 @@ func (c *command) calcHeadCorrect(ctx context.Context, attestation *phase0.Attes
 			})
 			if err != nil {
 				var apiError *api.Error
-				if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+				if errors.As(err, &apiError) && apiError.StatusCode == 404 {
 					if c.debug {
 						fmt.Printf("No block available for slot %d, assuming not in canonical chain", slot)
 					}
@@ -433,7 +561,80 @@ func (c *command) calcTargetCorrect(ctx context.Context, attestation *phase0.Att
 			})
 			if err != nil {
 				var apiError *api.Error
-				if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+				if errors.As(err, &apiError) && apiError.StatusCode == 404 {
+					if c.debug {
+						fmt.Printf("No block available for slot %d, assuming not in canonical chain", slot)
+					}
+					return false, nil
+				}
+			}
+			if response.Data == nil {
+				// No block.
+				slot--
+				continue
+			}
+			if !response.Data.Canonical {
+				// Not canonical.
+				slot--
+				continue
+			}
+			c.targetRoots[attestation.Data.Slot] = response.Data.Root
+			root = response.Data.Root
+			break
+		}
+	}
+	return bytes.Equal(root[:], attestation.Data.Target.Root[:]), nil
+}
+
+func (c *command) calcElectraHeadCorrect(ctx context.Context, attestation *electra.Attestation) (bool, error) {
+	slot := attestation.Data.Slot
+	root, exists := c.headRoots[slot]
+	if !exists {
+		for {
+			response, err := c.blockHeadersProvider.BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{
+				Block: fmt.Sprintf("%d", slot),
+			})
+			if err != nil {
+				var apiError *api.Error
+				if errors.As(err, &apiError) && apiError.StatusCode == 404 {
+					if c.debug {
+						fmt.Printf("No block available for slot %d, assuming not in canonical chain", slot)
+					}
+					return false, nil
+				}
+				return false, err
+			}
+			if response.Data == nil {
+				// No block.
+				slot--
+				continue
+			}
+			if !response.Data.Canonical {
+				// Not canonical.
+				slot--
+				continue
+			}
+			c.headRoots[attestation.Data.Slot] = response.Data.Root
+			root = response.Data.Root
+			break
+		}
+	}
+
+	return bytes.Equal(root[:], attestation.Data.BeaconBlockRoot[:]), nil
+}
+
+func (c *command) calcElectraTargetCorrect(ctx context.Context, attestation *electra.Attestation) (bool, error) {
+	root, exists := c.targetRoots[attestation.Data.Slot]
+	if !exists {
+		// Start with first slot of the target epoch.
+		slot := c.chainTime.FirstSlotOfEpoch(attestation.Data.Target.Epoch)
+		for {
+			response, err := c.blockHeadersProvider.BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{
+				Block: fmt.Sprintf("%d", slot),
+			})
+			if err != nil {
+				var apiError *api.Error
+				if errors.As(err, &apiError) && apiError.StatusCode == 404 {
 					if c.debug {
 						fmt.Printf("No block available for slot %d, assuming not in canonical chain", slot)
 					}
--- a/cmd/block/info/input.go
+++ b/cmd/block/info/input.go
@@ -57,10 +57,11 @@ func input(ctx context.Context) (*dataIn, error) {

 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       viper.GetString("connection"),
-		Timeout:       viper.GetDuration("timeout"),
-		AllowInsecure: viper.GetBool("allow-insecure-connections"),
-		LogFallback:   !data.quiet,
+		Address:           viper.GetString("connection"),
+		Timeout:           viper.GetDuration("timeout"),
+		AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+		CustomSpecSupport: viper.GetBool("custom-spec"),
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, err
--- a/cmd/block/info/output.go
+++ b/cmd/block/info/output.go
@@ -19,7 +19,6 @@ import (
 	"encoding/hex"
 	"fmt"
 	"math/big"
-	"regexp"
 	"sort"
 	"strconv"
 	"strings"
@@ -32,6 +31,7 @@ import (
 	"github.com/attestantio/go-eth2-client/spec/bellatrix"
 	"github.com/attestantio/go-eth2-client/spec/capella"
 	"github.com/attestantio/go-eth2-client/spec/deneb"
+	"github.com/attestantio/go-eth2-client/spec/electra"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/go-bitfield"
@@ -55,7 +55,7 @@ func output(_ context.Context, data *dataOut) (string, error) {
 	return "", nil
 }

-func outputBlockGeneral(ctx context.Context,
+func outputBlockGeneral(_ context.Context,
 	verbose bool,
 	slot phase0.Slot,
 	proposerIndex phase0.ValidatorIndex,
@@ -83,7 +83,14 @@ func outputBlockGeneral(ctx context.Context,
 		res.WriteString(fmt.Sprintf("Parent root: %#x\n", parentRoot))
 		res.WriteString(fmt.Sprintf("State root: %#x\n", stateRoot))
 	}
-	res.WriteString(blockGraffiti(ctx, graffiti))
+	if len(graffiti) > 0 && hex.EncodeToString(graffiti) != "0000000000000000000000000000000000000000000000000000000000000000" {
+		graffiti = bytes.TrimRight(graffiti, "\u0000")
+		if utf8.Valid(graffiti) {
+			res.WriteString(fmt.Sprintf("Graffiti: %s\n", string(graffiti)))
+		} else {
+			res.WriteString(fmt.Sprintf("Graffiti: %#x\n", graffiti))
+		}
+	}

 	return res.String(), nil
 }
@@ -198,6 +205,120 @@ func outputBlockAttesterSlashings(ctx context.Context, eth2Client eth2client.Ser
 	return res.String(), nil
 }

+func outputElectraBlockAttestations(ctx context.Context,
+	eth2Client eth2client.Service,
+	verbose bool,
+	attestations []*electra.Attestation,
+) (
+	string,
+	error,
+) {
+	res := strings.Builder{}
+
+	validatorCommittees := make(map[phase0.Slot]map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
+	res.WriteString(fmt.Sprintf("Attestations: %d\n", len(attestations)))
+	if verbose {
+		beaconCommitteesProvider, isProvider := eth2Client.(eth2client.BeaconCommitteesProvider)
+		if isProvider {
+			for i, att := range attestations {
+				res.WriteString(fmt.Sprintf("  %d:\n", i))
+
+				// Fetch committees for this epoch if not already obtained.
+				committees, exists := validatorCommittees[att.Data.Slot]
+				if !exists {
+					response, err := beaconCommitteesProvider.BeaconCommittees(ctx, &api.BeaconCommitteesOpts{
+						State: fmt.Sprintf("%d", att.Data.Slot),
+					})
+					if err != nil {
+						// Failed to get it; create an empty committee to stop us continually attempting to re-fetch.
+						validatorCommittees[att.Data.Slot] = make(map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
+					} else {
+						for _, beaconCommittee := range response.Data {
+							if _, exists := validatorCommittees[beaconCommittee.Slot]; !exists {
+								validatorCommittees[beaconCommittee.Slot] = make(map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
+							}
+							validatorCommittees[beaconCommittee.Slot][beaconCommittee.Index] = beaconCommittee.Validators
+						}
+					}
+					committees = validatorCommittees[att.Data.Slot]
+				}
+
+				res.WriteString(fmt.Sprintf("    Committee index: %d\n", att.Data.Index))
+				res.WriteString(fmt.Sprintf("    Attesters: %d/%d\n", att.AggregationBits.Count(), att.AggregationBits.Len()))
+				res.WriteString(fmt.Sprintf("    Aggregation bits: %s\n", bitlistToString(att.AggregationBits)))
+				if _, exists := committees[att.Data.Index]; exists {
+					res.WriteString(fmt.Sprintf("    Attesting indices: %s\n", attestingIndices(att.AggregationBits, committees[att.Data.Index])))
+				}
+				res.WriteString(fmt.Sprintf("    Slot: %d\n", att.Data.Slot))
+				res.WriteString(fmt.Sprintf("    Beacon block root: %#x\n", att.Data.BeaconBlockRoot))
+				res.WriteString(fmt.Sprintf("    Source epoch: %d\n", att.Data.Source.Epoch))
+				res.WriteString(fmt.Sprintf("    Source root: %#x\n", att.Data.Source.Root))
+				res.WriteString(fmt.Sprintf("    Target epoch: %d\n", att.Data.Target.Epoch))
+				res.WriteString(fmt.Sprintf("    Target root: %#x\n", att.Data.Target.Root))
+			}
+		}
+	}
+
+	return res.String(), nil
+}
+
+func outputElectraBlockAttesterSlashings(ctx context.Context,
+	eth2Client eth2client.Service,
+	verbose bool,
+	attesterSlashings []*electra.AttesterSlashing,
+) (
+	string,
+	error,
+) {
+	res := strings.Builder{}
+
+	res.WriteString(fmt.Sprintf("Attester slashings: %d\n", len(attesterSlashings)))
+	if verbose {
+		for i, slashing := range attesterSlashings {
+			// Say what was slashed.
+			att1 := slashing.Attestation1
+			att2 := slashing.Attestation2
+			slashedIndices := intersection(att1.AttestingIndices, att2.AttestingIndices)
+			if len(slashedIndices) == 0 {
+				continue
+			}
+
+			res.WriteString(fmt.Sprintf("  %d:\n", i))
+			res.WriteString(fmt.Sprintln("    Slashed validators:"))
+			response, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, &api.ValidatorsOpts{
+				State:   "head",
+				Indices: slashedIndices,
+			})
+			if err != nil {
+				return "", errors.Wrap(err, "failed to obtain beacon committees")
+			}
+			for k, v := range response.Data {
+				res.WriteString(fmt.Sprintf("      %#x (%d)\n", v.Validator.PublicKey[:], k))
+			}
+
+			// Say what caused the slashing.
+			if att1.Data.Target.Epoch == att2.Data.Target.Epoch {
+				res.WriteString(fmt.Sprintf("    Double voted for same target epoch (%d):\n", att1.Data.Target.Epoch))
+				if !bytes.Equal(att1.Data.Target.Root[:], att2.Data.Target.Root[:]) {
+					res.WriteString(fmt.Sprintf("      Attestation 1 target epoch root: %#x\n", att1.Data.Target.Root))
+					res.WriteString(fmt.Sprintf("      Attestation 2target epoch root: %#x\n", att2.Data.Target.Root))
+				}
+				if !bytes.Equal(att1.Data.BeaconBlockRoot[:], att2.Data.BeaconBlockRoot[:]) {
+					res.WriteString(fmt.Sprintf("      Attestation 1 beacon block root: %#x\n", att1.Data.BeaconBlockRoot))
+					res.WriteString(fmt.Sprintf("      Attestation 2 beacon block root: %#x\n", att2.Data.BeaconBlockRoot))
+				}
+			} else if att1.Data.Source.Epoch < att2.Data.Source.Epoch &&
+				att1.Data.Target.Epoch > att2.Data.Target.Epoch {
+				res.WriteString("    Surround voted:\n")
+				res.WriteString(fmt.Sprintf("      Attestation 1 vote: %d->%d\n", att1.Data.Source.Epoch, att1.Data.Target.Epoch))
+				res.WriteString(fmt.Sprintf("      Attestation 2 vote: %d->%d\n", att2.Data.Source.Epoch, att2.Data.Target.Epoch))
+			}
+		}
+	}
+
+	return res.String(), nil
+}
+
 func outputBlockDeposits(_ context.Context, verbose bool, deposits []*phase0.Deposit) (string, error) {
 	res := strings.Builder{}

@@ -289,7 +410,7 @@ func outputBlockSyncAggregate(ctx context.Context, eth2Client eth2client.Service
 						res.WriteString(fmt.Sprintf("  Error: failed to obtain sync committee: %v\n", err))
 					} else {
 						res.WriteString("  Contributing validators:")
-						for i := range syncAggregate.SyncCommitteeBits.Len() {
+						for i := uint64(0); i < syncAggregate.SyncCommitteeBits.Len(); i++ {
 							if syncAggregate.SyncCommitteeBits.BitAt(i) {
 								res.WriteString(fmt.Sprintf(" %d", syncCommitteeResponse.Data.Validators[i]))
 							}
@@ -511,6 +632,116 @@ func outputDenebBlockText(ctx context.Context,
 	return res.String(), nil
 }

+func outputElectraBlockText(ctx context.Context,
+	data *dataOut,
+	signedBlock *electra.SignedBeaconBlock,
+	blobs []*deneb.BlobSidecar,
+) (
+	string,
+	error,
+) {
+	if signedBlock == nil {
+		return "", errors.New("no block supplied")
+	}
+
+	body := signedBlock.Message.Body
+
+	res := strings.Builder{}
+
+	// General info.
+	blockRoot, err := signedBlock.Message.HashTreeRoot()
+	if err != nil {
+		return "", errors.Wrap(err, "failed to obtain block root")
+	}
+	bodyRoot, err := signedBlock.Message.Body.HashTreeRoot()
+	if err != nil {
+		return "", errors.Wrap(err, "failed to generate body root")
+	}
+
+	tmp, err := outputBlockGeneral(ctx,
+		data.verbose,
+		signedBlock.Message.Slot,
+		signedBlock.Message.ProposerIndex,
+		blockRoot,
+		bodyRoot,
+		signedBlock.Message.ParentRoot,
+		signedBlock.Message.StateRoot,
+		signedBlock.Message.Body.Graffiti[:],
+		data.genesisTime,
+		data.slotDuration,
+		data.slotsPerEpoch)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	// Eth1 data.
+	if data.verbose {
+		tmp, err := outputBlockETH1Data(ctx, body.ETH1Data)
+		if err != nil {
+			return "", err
+		}
+		res.WriteString(tmp)
+	}
+
+	// Sync aggregate.
+	tmp, err = outputBlockSyncAggregate(ctx, data.eth2Client, data.verbose, signedBlock.Message.Body.SyncAggregate, phase0.Epoch(uint64(signedBlock.Message.Slot)/data.slotsPerEpoch))
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	// Attestations.
+	tmp, err = outputElectraBlockAttestations(ctx, data.eth2Client, data.verbose, signedBlock.Message.Body.Attestations)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	// Attester slashings.
+	tmp, err = outputElectraBlockAttesterSlashings(ctx, data.eth2Client, data.verbose, signedBlock.Message.Body.AttesterSlashings)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	res.WriteString(fmt.Sprintf("Proposer slashings: %d\n", len(body.ProposerSlashings)))
+	// Add verbose proposer slashings.
+
+	tmp, err = outputBlockDeposits(ctx, data.verbose, signedBlock.Message.Body.Deposits)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	// Voluntary exits.
+	tmp, err = outputBlockVoluntaryExits(ctx, data.eth2Client, data.verbose, signedBlock.Message.Body.VoluntaryExits)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	tmp, err = outputBlockBLSToExecutionChanges(ctx, data.eth2Client, data.verbose, signedBlock.Message.Body.BLSToExecutionChanges)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	tmp, err = outputElectraBlockExecutionPayload(ctx, data.verbose, signedBlock.Message.Body.ExecutionPayload)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	tmp, err = outputElectraBlobInfo(ctx, data.verbose, signedBlock.Message.Body, blobs)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	return res.String(), nil
+}
+
 func outputBellatrixBlockText(ctx context.Context, data *dataOut, signedBlock *bellatrix.SignedBeaconBlock) (string, error) {
 	if signedBlock == nil {
 		return "", errors.New("no block supplied")
@@ -791,7 +1022,7 @@ func outputCapellaBlockExecutionPayload(_ context.Context,
 		res.WriteString("  Execution block number: ")
 		res.WriteString(fmt.Sprintf("%d\n", payload.BlockNumber))
 		baseFeePerGasBEBytes := make([]byte, len(payload.BaseFeePerGas))
-		for i := range 32 {
+		for i := 0; i < 32; i++ {
 			baseFeePerGasBEBytes[i] = payload.BaseFeePerGas[32-1-i]
 		}
 		baseFeePerGas := new(big.Int).SetBytes(baseFeePerGasBEBytes)
@@ -897,6 +1128,71 @@ func outputDenebBlockExecutionPayload(_ context.Context,
 	return res.String(), nil
 }

+func outputElectraBlockExecutionPayload(_ context.Context,
+	verbose bool,
+	payload *electra.ExecutionPayload,
+) (
+	string,
+	error,
+) {
+	if payload == nil {
+		return "", nil
+	}
+
+	// If the block number is 0 then we're before the merge.
+	if payload.BlockNumber == 0 {
+		return "", nil
+	}
+
+	res := strings.Builder{}
+	if !verbose {
+		res.WriteString("Execution block number: ")
+		res.WriteString(fmt.Sprintf("%d\n", payload.BlockNumber))
+		res.WriteString("Transactions: ")
+		res.WriteString(fmt.Sprintf("%d\n", len(payload.Transactions)))
+	} else {
+		res.WriteString("Execution payload:\n")
+		res.WriteString("  Execution block number: ")
+		res.WriteString(fmt.Sprintf("%d\n", payload.BlockNumber))
+		res.WriteString("  Base fee per gas: ")
+		res.WriteString(string2eth.WeiToString(payload.BaseFeePerGas.ToBig(), true))
+		res.WriteString("\n  Block hash: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.BlockHash))
+		res.WriteString("  Parent hash: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.ParentHash))
+		res.WriteString("  Fee recipient: ")
+		res.WriteString(payload.FeeRecipient.String())
+		res.WriteString("  Gas limit: ")
+		res.WriteString(fmt.Sprintf("%d\n", payload.GasLimit))
+		res.WriteString("  Gas used: ")
+		res.WriteString(fmt.Sprintf("%d\n", payload.GasUsed))
+		res.WriteString("  Timestamp: ")
+		res.WriteString(fmt.Sprintf("%s (%d)\n", time.Unix(int64(payload.Timestamp), 0).String(), payload.Timestamp))
+		res.WriteString("  Prev RANDAO: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.PrevRandao))
+		res.WriteString("  Receipts root: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.ReceiptsRoot))
+		res.WriteString("  State root: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.StateRoot))
+		res.WriteString("  Extra data: ")
+		if utf8.Valid(payload.ExtraData) {
+			res.WriteString(fmt.Sprintf("%s\n", string(payload.ExtraData)))
+		} else {
+			res.WriteString(fmt.Sprintf("%#x\n", payload.ExtraData))
+		}
+		res.WriteString("  Logs bloom: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.LogsBloom))
+		res.WriteString("  Transactions: ")
+		res.WriteString(fmt.Sprintf("%d\n", len(payload.Transactions)))
+		res.WriteString("  Withdrawals: ")
+		res.WriteString(fmt.Sprintf("%d\n", len(payload.Withdrawals)))
+		res.WriteString("  Excess blob gas: ")
+		res.WriteString(fmt.Sprintf("%d\n", payload.ExcessBlobGas))
+	}
+
+	return res.String(), nil
+}
+
 func outputDenebBlobInfo(_ context.Context,
 	verbose bool,
 	body *deneb.BeaconBlockBody,
@@ -926,6 +1222,35 @@ func outputDenebBlobInfo(_ context.Context,
 	return res.String(), nil
 }

+func outputElectraBlobInfo(_ context.Context,
+	verbose bool,
+	body *electra.BeaconBlockBody,
+	blobs []*deneb.BlobSidecar,
+) (
+	string,
+	error,
+) {
+	if body == nil {
+		return "", nil
+	}
+
+	if !verbose {
+		return fmt.Sprintf("Blobs: %d\n", len(body.BlobKZGCommitments)), nil
+	}
+
+	res := strings.Builder{}
+
+	for i, blob := range blobs {
+		if i == 0 {
+			res.WriteString("Blobs\n")
+		}
+		res.WriteString(fmt.Sprintf("  Index: %d\n", blob.Index))
+		res.WriteString(fmt.Sprintf("  KZG commitment: %s\n", body.BlobKZGCommitments[i].String()))
+	}
+
+	return res.String(), nil
+}
+
 func outputBellatrixBlockExecutionPayload(_ context.Context,
 	verbose bool,
 	payload *bellatrix.ExecutionPayload,
@@ -953,7 +1278,7 @@ func outputBellatrixBlockExecutionPayload(_ context.Context,
 		res.WriteString("  Execution block number: ")
 		res.WriteString(fmt.Sprintf("%d\n", payload.BlockNumber))
 		baseFeePerGasBEBytes := make([]byte, len(payload.BaseFeePerGas))
-		for i := range 32 {
+		for i := 0; i < 32; i++ {
 			baseFeePerGasBEBytes[i] = payload.BaseFeePerGas[32-1-i]
 		}
 		baseFeePerGas := new(big.Int).SetBytes(baseFeePerGasBEBytes)
@@ -1016,7 +1341,7 @@ func bitlistToString(input bitfield.Bitlist) string {
 	bits := int(input.Len())

 	res := ""
-	for i := range bits {
+	for i := 0; i < bits; i++ {
 		if input.BitAt(uint64(i)) {
 			res = fmt.Sprintf("%s✓", res)
 		} else {
@@ -1033,7 +1358,7 @@ func bitvectorToString(input bitfield.Bitvector512) string {
 	bits := int(input.Len())

 	res := strings.Builder{}
-	for i := range bits {
+	for i := 0; i < bits; i++ {
 		if input.BitAt(uint64(i)) {
 			res.WriteString("✓")
 		} else {
@@ -1049,102 +1374,10 @@ func bitvectorToString(input bitfield.Bitvector512) string {
 func attestingIndices(input bitfield.Bitlist, indices []phase0.ValidatorIndex) string {
 	bits := int(input.Len())
 	res := ""
-	for i := range bits {
+	for i := 0; i < bits; i++ {
 		if input.BitAt(uint64(i)) {
 			res = fmt.Sprintf("%s%d ", res, indices[i])
 		}
 	}
 	return strings.TrimSpace(res)
 }
-
-func blockGraffiti(_ context.Context, graffiti []byte) string {
-	if len(graffiti) == 0 || hex.EncodeToString(graffiti) == "0000000000000000000000000000000000000000000000000000000000000000" {
-		// No graffiti.
-		return ""
-	}
-
-	// Remove any trailing null characters.
-	graffiti = bytes.TrimRight(graffiti, "\u0000")
-
-	if !utf8.Valid(graffiti) {
-		// Graffiti is not valid UTF-8, return hex.
-		return fmt.Sprintf("Graffiti: %#x\n", graffiti)
-	}
-
-	// See if there is client identification information present in the graffiti.
-	// The client identification will always be the last entry in the graffiti, with a space beforehand.
-	parts := bytes.Split(graffiti, []byte{' '})
-
-	// Consensus and execution client values come from
-	// https://github.com/ethereum/execution-apis/blob/main/src/engine/identification.md
-	consensusClients := map[string]string{
-		"GR": "grandine",
-		"LH": "lighthouse",
-		"LS": "lodestar",
-		"NB": "nimbus",
-		"PM": "prysm",
-		"TK": "teku",
-	}
-	consensusRegex := regexp.MustCompile(`(GR|LH|LS|NB|PM|TK)([0-9a-f]*)`)
-	consensusData := consensusRegex.Find(parts[len(parts)-1])
-
-	executionClients := map[string]string{
-		"BU": "besu",
-		"EG": "erigon",
-		"EJ": "ethereumJS",
-		"GE": "go-ethereum",
-		"NM": "nethermind",
-		"RH": "reth",
-		"TR": "trin-execution",
-	}
-	executionRegex := regexp.MustCompile(`(BU|EG|EJ|GE|NM|RH|TR)([0-9a-f]*)`)
-	executionData := executionRegex.Find(parts[len(parts)-1])
-
-	if len(consensusData) == 0 && len(executionData) == 0 {
-		// There is no identifier; return the graffiti as-is.
-		return fmt.Sprintf("Graffiti: %s\n", string(graffiti))
-	}
-
-	res := strings.Builder{}
-
-	truncatedGraffiti := bytes.Join(parts[0:len(parts)-1], []byte(" "))
-	if len(truncatedGraffiti) > 0 {
-		res.WriteString(fmt.Sprintf("Graffiti: %s\n", string(truncatedGraffiti)))
-	}
-
-	if len(consensusData) > 0 {
-		consensusClient := consensusData[0:2]
-		consensusHash := ""
-		if len(consensusData) > 2 {
-			consensusHash = string(consensusData[2:])
-		}
-
-		res.WriteString("Consensus client: ")
-		res.WriteString(consensusClients[string(consensusClient)])
-		if consensusHash != "" {
-			res.WriteString(" (version hash ")
-			res.WriteString(consensusHash)
-			res.WriteString(")")
-		}
-		res.WriteString("\n")
-	}
-
-	if len(executionData) > 0 {
-		executionClient := executionData[0:2]
-		executionHash := ""
-		if len(executionData) > 2 {
-			executionHash = string(executionData[2:])
-		}
-
-		res.WriteString("Execution client: ")
-		res.WriteString(executionClients[string(executionClient)])
-		if executionHash != "" {
-			res.WriteString(" (version hash ")
-			res.WriteString(executionHash)
-			res.WriteString(")")
-		}
-		res.WriteString("\n")
-	}
-
-	return res.String()
-}
--- a/cmd/block/info/output_internal_test.go
+++ b/cmd/block/info/output_internal_test.go
@@ -175,58 +175,3 @@ func TestOutputBlockETH1Data(t *testing.T) {
 		})
 	}
 }
-
-func TestBlockGraffiti(t *testing.T) {
-	tests := []struct {
-		name     string
-		graffiti []byte
-		res      string
-	}{
-		{
-			name:     "Empty",
-			graffiti: []byte(""),
-		},
-		{
-			name:     "NoID",
-			graffiti: []byte("No identifier"),
-			res:      "Graffiti: No identifier\n",
-		},
-		{
-			name:     "SingleClient",
-			graffiti: []byte("Graffiti TK"),
-			res:      "Graffiti: Graffiti\nConsensus client: teku\n",
-		},
-		{
-			name:     "SingleClientImmediate",
-			graffiti: []byte("TK"),
-			res:      "Consensus client: teku\n",
-		},
-		{
-			name:     "SingleClientAndHashImmediate",
-			graffiti: []byte("TKa9f98260"),
-			res:      "Consensus client: teku (version hash a9f98260)\n",
-		},
-		{
-			name:     "DualClients",
-			graffiti: []byte("LHGE"),
-			res:      "Consensus client: lighthouse\nExecution client: go-ethereum\n",
-		},
-		{
-			name:     "DualClientsReverseOrder",
-			graffiti: []byte("GELH"),
-			res:      "Consensus client: lighthouse\nExecution client: go-ethereum\n",
-		},
-		{
-			name:     "DualClientsTruncatedHash",
-			graffiti: []byte("Freedom To Transact TKa9f9NM220b"),
-			res:      "Graffiti: Freedom To Transact\nConsensus client: teku (version hash a9f9)\nExecution client: nethermind (version hash 220b)\n",
-		},
-	}
-
-	for _, test := range tests {
-		t.Run(test.name, func(t *testing.T) {
-			res := blockGraffiti(context.Background(), test.graffiti)
-			require.Equal(t, test.res, res)
-		})
-	}
-}
--- a/cmd/block/info/process.go
+++ b/cmd/block/info/process.go
@@ -31,6 +31,7 @@ import (
 	"github.com/attestantio/go-eth2-client/spec/bellatrix"
 	"github.com/attestantio/go-eth2-client/spec/capella"
 	"github.com/attestantio/go-eth2-client/spec/deneb"
+	"github.com/attestantio/go-eth2-client/spec/electra"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
@@ -114,23 +115,27 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 			return nil, errors.Wrap(err, "failed to output block")
 		}
 	case spec.DataVersionDeneb:
-		var blobSidecars []*deneb.BlobSidecar
-		kzgCommitments, err := block.BlobKZGCommitments()
+		blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: data.blockID,
+		})
 		if err != nil {
-			return nil, err
-		}
-		if len(kzgCommitments) > 0 {
-			blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
-				Block: data.blockID,
-			})
-			if err != nil {
-				return nil, errors.Wrap(err, "failed to obtain blob sidecars")
-			}
-			blobSidecars = blobSidecarsResponse.Data
+			return nil, errors.Wrap(err, "failed to obtain blob sidecars")
 		}
+		blobSidecars := blobSidecarsResponse.Data
 		if err := outputDenebBlock(ctx, data.jsonOutput, data.sszOutput, block.Deneb, blobSidecars); err != nil {
 			return nil, errors.Wrap(err, "failed to output block")
 		}
+	case spec.DataVersionElectra:
+		blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: data.blockID,
+		})
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to obtain blob sidecars")
+		}
+		blobSidecars := blobSidecarsResponse.Data
+		if err := outputElectraBlock(ctx, data.jsonOutput, data.sszOutput, block.Electra, blobSidecars); err != nil {
+			return nil, errors.Wrap(err, "failed to output block")
+		}
 	default:
 		return nil, errors.New("unknown block version")
 	}
@@ -187,25 +192,21 @@ func headEventHandler(event *apiv1.Event) {
 	case spec.DataVersionCapella:
 		err = outputCapellaBlock(ctx, jsonOutput, sszOutput, block.Capella)
 	case spec.DataVersionDeneb:
-		var blobSidecars []*deneb.BlobSidecar
-		var kzgCommitments []deneb.KZGCommitment
-		kzgCommitments, err = block.BlobKZGCommitments()
-		if err != nil {
-			fmt.Fprintf(os.Stderr, "Failed to obtain KZG commitments: %v\n", err)
-			return
+		var blobSidecarsResponse *api.Response[[]*deneb.BlobSidecar]
+		blobSidecarsResponse, err = results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: blockID,
+		})
+		if err == nil {
+			err = outputDenebBlock(context.Background(), jsonOutput, sszOutput, block.Deneb, blobSidecarsResponse.Data)
 		}
-		if len(kzgCommitments) > 0 {
-			var blobSidecarsResponse *api.Response[[]*deneb.BlobSidecar]
-			blobSidecarsResponse, err = results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
-				Block: blockID,
-			})
-			if err != nil {
-				fmt.Fprintf(os.Stderr, "Failed to obtain blob sidecars: %v\n", err)
-				return
-			}
-			blobSidecars = blobSidecarsResponse.Data
+	case spec.DataVersionElectra:
+		var blobSidecarsResponse *api.Response[[]*deneb.BlobSidecar]
+		blobSidecarsResponse, err = results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: blockID,
+		})
+		if err == nil {
+			err = outputElectraBlock(context.Background(), jsonOutput, sszOutput, block.Electra, blobSidecarsResponse.Data)
 		}
-		err = outputDenebBlock(context.Background(), jsonOutput, sszOutput, block.Deneb, blobSidecars)
 	default:
 		err = errors.New("unknown block version")
 	}
@@ -338,6 +339,35 @@ func outputDenebBlock(ctx context.Context,
 	return nil
 }

+func outputElectraBlock(ctx context.Context,
+	jsonOutput bool,
+	sszOutput bool,
+	signedBlock *electra.SignedBeaconBlock,
+	blobs []*deneb.BlobSidecar,
+) error {
+	switch {
+	case jsonOutput:
+		data, err := json.Marshal(signedBlock)
+		if err != nil {
+			return errors.Wrap(err, "failed to generate JSON")
+		}
+		fmt.Printf("%s\n", string(data))
+	case sszOutput:
+		data, err := signedBlock.MarshalSSZ()
+		if err != nil {
+			return errors.Wrap(err, "failed to generate SSZ")
+		}
+		fmt.Printf("%x\n", data)
+	default:
+		data, err := outputElectraBlockText(ctx, results, signedBlock, blobs)
+		if err != nil {
+			return errors.Wrap(err, "failed to generate text")
+		}
+		fmt.Print(data)
+	}
+	return nil
+}
+
 func timeToBlockID(ctx context.Context, eth2Client eth2client.Service, input string) (string, error) {
 	var timestamp time.Time

--- a/cmd/chain/eth1votes/command.go
+++ b/cmd/chain/eth1votes/command.go
@@ -34,6 +34,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Input.
 	xepoch  string
@@ -64,10 +65,11 @@ type vote struct {

 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
-		quiet:   viper.GetBool("quiet"),
-		verbose: viper.GetBool("verbose"),
-		debug:   viper.GetBool("debug"),
-		json:    viper.GetBool("json"),
+		quiet:             viper.GetBool("quiet"),
+		verbose:           viper.GetBool("verbose"),
+		debug:             viper.GetBool("debug"),
+		json:              viper.GetBool("json"),
+		customSpecSupport: viper.GetBool("custom-spec"),
 	}

 	// Timeout.
--- a/cmd/chain/eth1votes/process.go
+++ b/cmd/chain/eth1votes/process.go
@@ -97,6 +97,9 @@ func (c *command) process(ctx context.Context) error {
 	case spec.DataVersionDeneb:
 		c.incumbent = state.Deneb.ETH1Data
 		c.eth1DataVotes = state.Deneb.ETH1DataVotes
+	case spec.DataVersionElectra:
+		c.incumbent = state.Electra.ETH1Data
+		c.eth1DataVotes = state.Electra.ETH1DataVotes
 	default:
 		return fmt.Errorf("unhandled beacon state version %v", state.Version)
 	}
@@ -124,10 +127,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
--- a/cmd/chain/queues/command.go
+++ b/cmd/chain/queues/command.go
@@ -33,6 +33,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Input.
 	epoch string
@@ -49,10 +50,11 @@ type command struct {

 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
-		quiet:   viper.GetBool("quiet"),
-		verbose: viper.GetBool("verbose"),
-		debug:   viper.GetBool("debug"),
-		json:    viper.GetBool("json"),
+		quiet:             viper.GetBool("quiet"),
+		verbose:           viper.GetBool("verbose"),
+		debug:             viper.GetBool("debug"),
+		json:              viper.GetBool("json"),
+		customSpecSupport: viper.GetBool("custom-spec"),
 	}

 	// Timeout.
--- a/cmd/chain/queues/process.go
+++ b/cmd/chain/queues/process.go
@@ -62,10 +62,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
--- a/cmd/chain/time/input.go
+++ b/cmd/chain/time/input.go
@@ -31,6 +31,7 @@ type dataIn struct {
 	// Input
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool
 	timestamp                string
 	slot                     string
 	epoch                    string
@@ -73,6 +74,7 @@ func input(_ context.Context) (*dataIn, error) {

 	data.connection = viper.GetString("connection")
 	data.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+	data.customSpecSupport = viper.GetBool("custom-spec")

 	return data, nil
 }
--- a/cmd/chain/time/process.go
+++ b/cmd/chain/time/process.go
@@ -31,10 +31,11 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	}

 	eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       data.connection,
-		Timeout:       data.timeout,
-		AllowInsecure: data.allowInsecureConnections,
-		LogFallback:   !data.quiet,
+		Address:           data.connection,
+		Timeout:           data.timeout,
+		AllowInsecure:     data.allowInsecureConnections,
+		CustomSpecSupport: data.customSpecSupport,
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to connect to Ethereum 2 beacon node")
--- a/cmd/chain/verify/signedcontributionandproof/command.go
+++ b/cmd/chain/verify/signedcontributionandproof/command.go
@@ -33,6 +33,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Input.
 	data string
@@ -60,9 +61,10 @@ type command struct {

 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
-		quiet:   viper.GetBool("quiet"),
-		verbose: viper.GetBool("verbose"),
-		debug:   viper.GetBool("debug"),
+		quiet:             viper.GetBool("quiet"),
+		verbose:           viper.GetBool("verbose"),
+		debug:             viper.GetBool("debug"),
+		customSpecSupport: viper.GetBool("custom-spec"),
 	}

 	// Timeout.
--- a/cmd/chain/verify/signedcontributionandproof/process.go
+++ b/cmd/chain/verify/signedcontributionandproof/process.go
@@ -87,10 +87,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
@@ -221,7 +222,7 @@ func (c *command) confirmContributionSignature(ctx context.Context) error {

 	subCommittee := c.syncCommittee.ValidatorAggregates[c.item.Message.Contribution.SubcommitteeIndex]
 	includedIndices := make([]phase0.ValidatorIndex, 0, len(subCommittee))
-	for i := range c.item.Message.Contribution.AggregationBits.Len() {
+	for i := uint64(0); i < c.item.Message.Contribution.AggregationBits.Len(); i++ {
 		if c.item.Message.Contribution.AggregationBits.BitAt(i) {
 			includedIndices = append(includedIndices, subCommittee[int(i)])
 		}
--- a/cmd/chaininfo.go
+++ b/cmd/chaininfo.go
@@ -40,10 +40,11 @@ In quiet mode this will return 0 if the chain information can be obtained, other
 		ctx := context.Background()

 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-			Address:       viper.GetString("connection"),
-			Timeout:       viper.GetDuration("timeout"),
-			AllowInsecure: viper.GetBool("allow-insecure-connections"),
-			LogFallback:   !viper.GetBool("quiet"),
+			Address:           viper.GetString("connection"),
+			Timeout:           viper.GetDuration("timeout"),
+			AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+			CustomSpecSupport: viper.GetBool("custom-spec"),
+			LogFallback:       !viper.GetBool("quiet"),
 		})
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")

--- a/cmd/chainspec.go
+++ b/cmd/chainspec.go
@@ -41,10 +41,11 @@ In quiet mode this will return 0 if the chain specification can be obtained, oth
 		ctx := context.Background()

 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-			Address:       viper.GetString("connection"),
-			Timeout:       viper.GetDuration("timeout"),
-			AllowInsecure: viper.GetBool("allow-insecure-connections"),
-			LogFallback:   !viper.GetBool("quiet"),
+			Address:           viper.GetString("connection"),
+			Timeout:           viper.GetDuration("timeout"),
+			AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+			CustomSpecSupport: viper.GetBool("custom-spec"),
+			LogFallback:       !viper.GetBool("quiet"),
 		})
 		errCheck(err, "Failed to connect to Ethereum consensus node")

--- a/cmd/chainstatus.go
+++ b/cmd/chainstatus.go
@@ -44,10 +44,11 @@ In quiet mode this will return 0 if the chain status can be obtained, otherwise
 		ctx := context.Background()

 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-			Address:       viper.GetString("connection"),
-			Timeout:       viper.GetDuration("timeout"),
-			AllowInsecure: viper.GetBool("allow-insecure-connections"),
-			LogFallback:   !viper.GetBool("quiet"),
+			Address:           viper.GetString("connection"),
+			Timeout:           viper.GetDuration("timeout"),
+			AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+			CustomSpecSupport: viper.GetBool("custom-spec"),
+			LogFallback:       !viper.GetBool("quiet"),
 		})
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")

--- a/cmd/epoch.go
+++ b/cmd/epoch.go
@@ -29,12 +29,12 @@ func init() {
 	RootCmd.AddCommand(epochCmd)
 }

-func epochFlags(cmd *cobra.Command) {
-	cmd.Flags().String("epoch", "", "the epoch for which to obtain information (default current, can be 'current', 'last' or a number)")
+func epochFlags(_ *cobra.Command) {
+	epochSummaryCmd.Flags().String("epoch", "", "the epoch for which to obtain information (default current, can be 'current', 'last' or a number)")
 }

 func epochBindings(cmd *cobra.Command) {
-	if err := viper.BindPFlag("validators", cmd.Flags().Lookup("validators")); err != nil {
+	if err := viper.BindPFlag("epoch", cmd.Flags().Lookup("epoch")); err != nil {
 		panic(err)
 	}
 }
--- a/cmd/epoch/summary/command.go
+++ b/cmd/epoch/summary/command.go
@@ -34,13 +34,12 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Operation.
-	epoch         string
-	validatorsStr []string
-	validators    map[phase0.ValidatorIndex]struct{}
-	stream        bool
-	jsonOutput    bool
+	epoch      string
+	stream     bool
+	jsonOutput bool

 	// Data access.
 	eth2Client                 eth2client.Service
@@ -60,61 +59,45 @@ type command struct {
 }

 type epochSummary struct {
-	Epoch                      phase0.Epoch          `json:"epoch"`
-	FirstSlot                  phase0.Slot           `json:"first_slot"`
-	LastSlot                   phase0.Slot           `json:"last_slot"`
-	Blocks                     int                   `json:"blocks"`
-	Proposals                  []*epochProposal      `json:"proposals"`
-	SyncCommitteeValidators    int                   `json:"sync_committee_validators"`
-	SyncCommittee              []*epochSyncCommittee `json:"sync_committees"`
-	ActiveValidators           int                   `json:"active_validators"`
-	ParticipatingValidators    int                   `json:"participating_validators"`
-	HeadCorrectValidators      int                   `json:"head_correct_validators"`
-	HeadTimelyValidators       int                   `json:"head_timely_validators"`
-	SourceTimelyValidators     int                   `json:"source_timely_validators"`
-	TargetCorrectValidators    int                   `json:"target_correct_validators"`
-	TargetTimelyValidators     int                   `json:"target_timely_validators"`
-	NonParticipatingValidators []*attestingValidator `json:"nonparticipating_validators"`
-	NonHeadCorrectValidators   []*attestingValidator `json:"nonheadcorrect_validators"`
-	NonHeadTimelyValidators    []*attestingValidator `json:"nonheadtimely_validators"`
-	NonTargetCorrectValidators []*attestingValidator `json:"nontargetcorrect_validators"`
-	NonSourceTimelyValidators  []*attestingValidator `json:"nonsourcetimely_validators"`
-	Blobs                      int                   `json:"blobs"`
+	Epoch                      phase0.Epoch                 `json:"epoch"`
+	FirstSlot                  phase0.Slot                  `json:"first_slot"`
+	LastSlot                   phase0.Slot                  `json:"last_slot"`
+	Proposals                  []*epochProposal             `json:"proposals"`
+	SyncCommittee              []*epochSyncCommittee        `json:"sync_committees"`
+	ActiveValidators           int                          `json:"active_validators"`
+	ParticipatingValidators    int                          `json:"participating_validators"`
+	HeadCorrectValidators      int                          `json:"head_correct_validators"`
+	HeadTimelyValidators       int                          `json:"head_timely_validators"`
+	SourceTimelyValidators     int                          `json:"source_timely_validators"`
+	TargetCorrectValidators    int                          `json:"target_correct_validators"`
+	TargetTimelyValidators     int                          `json:"target_timely_validators"`
+	NonParticipatingValidators []*nonParticipatingValidator `json:"nonparticipating_validators"`
+	Blobs                      int                          `json:"blobs"`
 }

 type epochProposal struct {
-	ValidatorIndex phase0.ValidatorIndex `json:"validator_index"`
-	Slot           phase0.Slot           `json:"slot"`
-	Block          bool                  `json:"block"`
+	Slot     phase0.Slot           `json:"slot"`
+	Proposer phase0.ValidatorIndex `json:"proposer"`
+	Block    bool                  `json:"block"`
 }

 type epochSyncCommittee struct {
-	ValidatorIndex phase0.ValidatorIndex `json:"validator_index"`
-	Missed         int                   `json:"missed"`
-	MissedSlots    []phase0.Slot         `json:"missed_slots"`
+	Index  phase0.ValidatorIndex `json:"index"`
+	Missed int                   `json:"missed"`
 }

-type attestingValidator struct {
-	Validator     phase0.ValidatorIndex `json:"validator_index"`
-	Slot          phase0.Slot           `json:"slot"`
-	Committee     phase0.CommitteeIndex `json:"committee_index"`
-	HeadVote      *phase0.Root          `json:"head_vote,omitempty"`
-	Head          *phase0.Root          `json:"head,omitempty"`
-	TargetVote    *phase0.Root          `json:"target_vote,omitempty"`
-	Target        *phase0.Root          `json:"target,omitempty"`
-	InclusionSlot phase0.Slot           `json:"inclusion_slot,omitempty"`
+type nonParticipatingValidator struct {
+	Validator phase0.ValidatorIndex `json:"validator_index"`
+	Slot      phase0.Slot           `json:"slot"`
+	Committee phase0.CommitteeIndex `json:"committee_index"`
 }

 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
-		quiet:         viper.GetBool("quiet"),
-		verbose:       viper.GetBool("verbose"),
-		debug:         viper.GetBool("debug"),
-		validatorsStr: viper.GetStringSlice("validators"),
-		summary: &epochSummary{
-			Proposals: make([]*epochProposal, 0),
-		},
-		validators:  make(map[phase0.ValidatorIndex]struct{}),
+		quiet:       viper.GetBool("quiet"),
+		verbose:     viper.GetBool("verbose"),
+		debug:       viper.GetBool("debug"),
+		summary:     &epochSummary{},
 		blocksCache: make(map[string]*spec.VersionedSignedBeaconBlock),
 	}

@@ -126,6 +109,7 @@ func newCommand(_ context.Context) (*command, error) {

 	c.connection = viper.GetString("connection")
 	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+	c.customSpecSupport = viper.GetBool("custom-spec")

 	c.epoch = viper.GetString("epoch")
 	c.stream = viper.GetBool("stream")
--- a/cmd/epoch/summary/output.go
+++ b/cmd/epoch/summary/output.go
@@ -50,7 +50,7 @@ func (c *command) outputTxt(_ context.Context) (string, error) {
 	missedProposals := make([]string, 0, len(c.summary.Proposals))
 	for _, proposal := range c.summary.Proposals {
 		if !proposal.Block {
-			missedProposals = append(missedProposals, fmt.Sprintf("\n    Slot %d (validator %d)", proposal.Slot, proposal.ValidatorIndex))
+			missedProposals = append(missedProposals, fmt.Sprintf("\n    Slot %d (validator %d)", proposal.Slot, proposal.Proposer))
 		} else {
 			proposedBlocks++
 		}
@@ -64,7 +64,7 @@ func (c *command) outputTxt(_ context.Context) (string, error) {
 			builder.WriteString("\n    Slot ")
 			builder.WriteString(fmt.Sprintf("%d (%d/%d)", proposal.Slot, uint64(proposal.Slot)%uint64(len(c.summary.Proposals)), len(c.summary.Proposals)))
 			builder.WriteString(" validator ")
-			builder.WriteString(fmt.Sprintf("%d", proposal.ValidatorIndex))
+			builder.WriteString(fmt.Sprintf("%d", proposal.Proposer))
 			builder.WriteString(" not proposed or not included")
 		}
 	}
@@ -98,7 +98,7 @@ func (c *command) outputTxt(_ context.Context) (string, error) {
 		if c.verbose {
 			for _, syncCommittee := range c.summary.SyncCommittee {
 				builder.WriteString("\n    Validator ")
-				builder.WriteString(fmt.Sprintf("%d", syncCommittee.ValidatorIndex))
+				builder.WriteString(fmt.Sprintf("%d", syncCommittee.Index))
 				builder.WriteString(" included ")
 				builder.WriteString(fmt.Sprintf("%d/%d", proposedBlocks-syncCommittee.Missed, proposedBlocks))
 				builder.WriteString(fmt.Sprintf(" (%0.2f%%)", 100.0*float64(proposedBlocks-syncCommittee.Missed)/float64(proposedBlocks)))
--- a/cmd/epoch/summary/process.go
+++ b/cmd/epoch/summary/process.go
@@ -43,14 +43,6 @@ func (c *command) process(ctx context.Context) error {
 	c.summary.FirstSlot = c.chainTime.FirstSlotOfEpoch(c.summary.Epoch)
 	c.summary.LastSlot = c.chainTime.FirstSlotOfEpoch(c.summary.Epoch+1) - 1

-	validators, err := util.ParseValidators(ctx, c.validatorsProvider, c.validatorsStr, "head")
-	if err != nil {
-		return errors.Wrap(err, "failed to parse validators")
-	}
-	for _, validator := range validators {
-		c.validators[validator.Index] = struct{}{}
-	}
-
 	if err := c.processProposerDuties(ctx); err != nil {
 		return err
 	}
@@ -60,7 +52,6 @@ func (c *command) process(ctx context.Context) error {
 	if err := c.processSyncCommitteeDuties(ctx); err != nil {
 		return err
 	}
-
 	return c.processBlobs(ctx)
 }

@@ -78,20 +69,10 @@ func (c *command) processProposerDuties(ctx context.Context) error {
 			return errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", duty.Slot))
 		}
 		present := block != nil
-		if present {
-			c.summary.Blocks++
-		}
-
-		_, exists := c.validators[duty.ValidatorIndex]
-		if len(c.validators) > 0 && !exists {
-			// Not one of ours.
-			continue
-		}
-
 		c.summary.Proposals = append(c.summary.Proposals, &epochProposal{
-			Slot:           duty.Slot,
-			ValidatorIndex: duty.ValidatorIndex,
-			Block:          present,
+			Slot:     duty.Slot,
+			Proposer: duty.ValidatorIndex,
+			Block:    present,
 		})
 	}

@@ -99,25 +80,14 @@ func (c *command) processProposerDuties(ctx context.Context) error {
 }

 func (c *command) activeValidators(ctx context.Context) (map[phase0.ValidatorIndex]*apiv1.Validator, error) {
-	validatorIndices := make([]phase0.ValidatorIndex, 0, len(c.validators))
-	for validator := range c.validators {
-		validatorIndices = append(validatorIndices, validator)
-	}
-
 	response, err := c.validatorsProvider.Validators(ctx, &api.ValidatorsOpts{
-		State:   "head",
-		Indices: validatorIndices,
+		State: fmt.Sprintf("%d", c.chainTime.FirstSlotOfEpoch(c.summary.Epoch)),
 	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain validators for epoch")
 	}
 	activeValidators := make(map[phase0.ValidatorIndex]*apiv1.Validator)
 	for _, validator := range response.Data {
-		_, exists := c.validators[validator.Index]
-		if len(c.validators) > 0 && !exists {
-			continue
-		}
-
 		if validator.Validator.ActivationEpoch <= c.summary.Epoch && validator.Validator.ExitEpoch > c.summary.Epoch {
 			activeValidators[validator.Index] = validator
 		}
@@ -142,45 +112,20 @@ func (c *command) processAttesterDuties(ctx context.Context) error {
 		lastSlot = c.chainTime.CurrentSlot()
 	}

-	participatingValidators, headCorrectValidators, headTimelyValidators, sourceTimelyValidators, targetCorrectValidators, targetTimelyValidators, participations, err := c.processSlots(ctx, firstSlot, lastSlot)
+	var votes map[phase0.ValidatorIndex]struct{}
+	var participations map[phase0.ValidatorIndex]*nonParticipatingValidator
+	c.summary.ParticipatingValidators, c.summary.HeadCorrectValidators, c.summary.HeadTimelyValidators, c.summary.SourceTimelyValidators, c.summary.TargetCorrectValidators, c.summary.TargetTimelyValidators, votes, participations, err = c.processSlots(ctx, firstSlot, lastSlot)
 	if err != nil {
 		return err
 	}

-	c.summary.ParticipatingValidators = len(participatingValidators)
-	c.summary.HeadCorrectValidators = len(headCorrectValidators)
-	c.summary.HeadTimelyValidators = len(headTimelyValidators)
-	c.summary.SourceTimelyValidators = len(sourceTimelyValidators)
-	c.summary.TargetCorrectValidators = len(targetCorrectValidators)
-	c.summary.TargetTimelyValidators = len(targetTimelyValidators)
-
-	c.summary.NonParticipatingValidators = make([]*attestingValidator, 0, len(activeValidators)-len(participatingValidators))
+	c.summary.NonParticipatingValidators = make([]*nonParticipatingValidator, 0, len(activeValidators)-len(votes))
 	for activeValidatorIndex := range activeValidators {
-		if _, exists := participatingValidators[activeValidatorIndex]; !exists {
+		if _, exists := votes[activeValidatorIndex]; !exists {
 			if _, exists := participations[activeValidatorIndex]; exists {
 				c.summary.NonParticipatingValidators = append(c.summary.NonParticipatingValidators, participations[activeValidatorIndex])
 			}
 		}
-		if _, exists := headCorrectValidators[activeValidatorIndex]; !exists {
-			if _, exists := participations[activeValidatorIndex]; exists {
-				c.summary.NonHeadCorrectValidators = append(c.summary.NonHeadCorrectValidators, participations[activeValidatorIndex])
-			}
-		}
-		if _, exists := headTimelyValidators[activeValidatorIndex]; !exists {
-			if _, exists := participations[activeValidatorIndex]; exists {
-				c.summary.NonHeadTimelyValidators = append(c.summary.NonHeadTimelyValidators, participations[activeValidatorIndex])
-			}
-		}
-		if _, exists := targetCorrectValidators[activeValidatorIndex]; !exists {
-			if _, exists := participations[activeValidatorIndex]; exists {
-				c.summary.NonTargetCorrectValidators = append(c.summary.NonTargetCorrectValidators, participations[activeValidatorIndex])
-			}
-		}
-		if _, exists := sourceTimelyValidators[activeValidatorIndex]; !exists {
-			if _, exists := participations[activeValidatorIndex]; exists {
-				c.summary.NonSourceTimelyValidators = append(c.summary.NonSourceTimelyValidators, participations[activeValidatorIndex])
-			}
-		}
 	}
 	sort.Slice(c.summary.NonParticipatingValidators, func(i int, j int) bool {
 		if c.summary.NonParticipatingValidators[i].Slot != c.summary.NonParticipatingValidators[j].Slot {
@@ -195,18 +140,18 @@ func (c *command) processAttesterDuties(ctx context.Context) error {
 	return nil
 }

-//nolint:gocyclo
 func (c *command) processSlots(ctx context.Context,
 	firstSlot phase0.Slot,
 	lastSlot phase0.Slot,
 ) (
+	int,
+	int,
+	int,
+	int,
+	int,
+	int,
 	map[phase0.ValidatorIndex]struct{},
-	map[phase0.ValidatorIndex]struct{},
-	map[phase0.ValidatorIndex]struct{},
-	map[phase0.ValidatorIndex]struct{},
-	map[phase0.ValidatorIndex]struct{},
-	map[phase0.ValidatorIndex]struct{},
-	map[phase0.ValidatorIndex]*attestingValidator,
+	map[phase0.ValidatorIndex]*nonParticipatingValidator,
 	error,
 ) {
 	votes := make(map[phase0.ValidatorIndex]struct{})
@@ -216,7 +161,7 @@ func (c *command) processSlots(ctx context.Context,
 	targetCorrects := make(map[phase0.ValidatorIndex]struct{})
 	targetTimelys := make(map[phase0.ValidatorIndex]struct{})
 	allCommittees := make(map[phase0.Slot]map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
-	participations := make(map[phase0.ValidatorIndex]*attestingValidator)
+	participations := make(map[phase0.ValidatorIndex]*nonParticipatingValidator)

 	// Need a cache of beacon block headers to reduce lookup times.
 	headersCache := util.NewBeaconBlockHeaderCache(c.beaconBlockHeadersProvider)
@@ -224,7 +169,7 @@ func (c *command) processSlots(ctx context.Context,
 	for slot := firstSlot; slot <= lastSlot; slot++ {
 		block, err := c.fetchBlock(ctx, fmt.Sprintf("%d", slot))
 		if err != nil {
-			return nil, nil, nil, nil, nil, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", slot))
+			return 0, 0, 0, 0, 0, 0, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", slot))
 		}
 		if block == nil {
 			// No block at this slot; that's fine.
@@ -232,118 +177,90 @@ func (c *command) processSlots(ctx context.Context,
 		}
 		slot, err := block.Slot()
 		if err != nil {
-			return nil, nil, nil, nil, nil, nil, nil, err
+			return 0, 0, 0, 0, 0, 0, nil, nil, err
 		}
 		attestations, err := block.Attestations()
 		if err != nil {
-			return nil, nil, nil, nil, nil, nil, nil, err
+			return 0, 0, 0, 0, 0, 0, nil, nil, err
 		}
 		for _, attestation := range attestations {
-			if attestation.Data.Slot < c.chainTime.FirstSlotOfEpoch(c.summary.Epoch) || attestation.Data.Slot >= c.chainTime.FirstSlotOfEpoch(c.summary.Epoch+1) {
+			attestationData, err := attestation.Data()
+			if err != nil {
+				return 0, 0, 0, 0, 0, 0, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain attestation data for slot %d", slot))
+			}
+			if attestationData.Slot < c.chainTime.FirstSlotOfEpoch(c.summary.Epoch) || attestationData.Slot >= c.chainTime.FirstSlotOfEpoch(c.summary.Epoch+1) {
 				// Outside of this epoch's range.
 				continue
 			}
-			slotCommittees, exists := allCommittees[attestation.Data.Slot]
+			slotCommittees, exists := allCommittees[attestationData.Slot]
 			if !exists {
 				response, err := c.beaconCommitteesProvider.BeaconCommittees(ctx, &api.BeaconCommitteesOpts{
-					State: fmt.Sprintf("%d", attestation.Data.Slot),
+					State: fmt.Sprintf("%d", attestationData.Slot),
 				})
 				if err != nil {
-					return nil, nil, nil, nil, nil, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain committees for slot %d", attestation.Data.Slot))
+					return 0, 0, 0, 0, 0, 0, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain committees for slot %d", attestationData.Slot))
 				}
 				for _, beaconCommittee := range response.Data {
 					if _, exists := allCommittees[beaconCommittee.Slot]; !exists {
 						allCommittees[beaconCommittee.Slot] = make(map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
 					}
-
 					allCommittees[beaconCommittee.Slot][beaconCommittee.Index] = beaconCommittee.Validators
-
 					for _, index := range beaconCommittee.Validators {
-						if len(c.validators) > 0 {
-							if _, exists := c.validators[index]; !exists {
-								// Not one of our validators.
-								continue
-							}
-						}
-
-						if _, exists := participations[index]; !exists {
-							participations[index] = &attestingValidator{
-								Validator: index,
-								Slot:      beaconCommittee.Slot,
-								Committee: beaconCommittee.Index,
-							}
+						participations[index] = &nonParticipatingValidator{
+							Validator: index,
+							Slot:      beaconCommittee.Slot,
+							Committee: beaconCommittee.Index,
 						}
 					}
 				}
-				slotCommittees = allCommittees[attestation.Data.Slot]
+				slotCommittees = allCommittees[attestationData.Slot]
 			}
-			committee := slotCommittees[attestation.Data.Index]
+			committee := slotCommittees[attestationData.Index]

-			inclusionDistance := slot - attestation.Data.Slot
-
-			head, err := util.AttestationHead(ctx, headersCache, attestation)
+			inclusionDistance := slot - attestationData.Slot
+			headCorrect, err := util.AttestationHeadCorrect(ctx, headersCache, attestationData)
 			if err != nil {
-				return nil, nil, nil, nil, nil, nil, nil, err
+				return 0, 0, 0, 0, 0, 0, nil, nil, err
 			}
-			headCorrect, err := util.AttestationHeadCorrect(ctx, headersCache, attestation)
+			targetCorrect, err := util.AttestationTargetCorrect(ctx, headersCache, c.chainTime, attestationData)
 			if err != nil {
-				return nil, nil, nil, nil, nil, nil, nil, err
-			}
-			target, err := util.AttestationTarget(ctx, headersCache, c.chainTime, attestation)
-			if err != nil {
-				return nil, nil, nil, nil, nil, nil, nil, err
-			}
-			targetCorrect, err := util.AttestationTargetCorrect(ctx, headersCache, c.chainTime, attestation)
-			if err != nil {
-				return nil, nil, nil, nil, nil, nil, nil, err
+				return 0, 0, 0, 0, 0, 0, nil, nil, err
 			}

-			for i := range attestation.AggregationBits.Len() {
-				if attestation.AggregationBits.BitAt(i) {
-					validatorIndex := committee[int(i)]
-					if len(c.validators) > 0 {
-						if _, exists := c.validators[validatorIndex]; !exists {
-							// Not one of our validators.
-							continue
-						}
+			aggregationBits, err := attestation.AggregationBits()
+			if err != nil {
+				return 0, 0, 0, 0, 0, 0, nil, nil, err
+			}
+			for i := uint64(0); i < aggregationBits.Len(); i++ {
+				if aggregationBits.BitAt(i) {
+					votes[committee[int(i)]] = struct{}{}
+					if _, exists := headCorrects[committee[int(i)]]; !exists && headCorrect {
+						headCorrects[committee[int(i)]] = struct{}{}
 					}
-
-					// Only set the information from the first attestation we find for this validator.
-					if participations[validatorIndex].InclusionSlot == 0 {
-						participations[validatorIndex].HeadVote = &attestation.Data.BeaconBlockRoot
-						participations[validatorIndex].Head = &head
-						participations[validatorIndex].TargetVote = &attestation.Data.Target.Root
-						participations[validatorIndex].Target = &target
-						participations[validatorIndex].InclusionSlot = slot
+					if _, exists := headTimelys[committee[int(i)]]; !exists && headCorrect && inclusionDistance == 1 {
+						headTimelys[committee[int(i)]] = struct{}{}
 					}
-
-					votes[validatorIndex] = struct{}{}
-					if _, exists := headCorrects[validatorIndex]; !exists && headCorrect {
-						headCorrects[validatorIndex] = struct{}{}
+					if _, exists := sourceTimelys[committee[int(i)]]; !exists && inclusionDistance <= 5 {
+						sourceTimelys[committee[int(i)]] = struct{}{}
 					}
-					if _, exists := headTimelys[validatorIndex]; !exists && headCorrect && inclusionDistance == 1 {
-						headTimelys[validatorIndex] = struct{}{}
+					if _, exists := targetCorrects[committee[int(i)]]; !exists && targetCorrect {
+						targetCorrects[committee[int(i)]] = struct{}{}
 					}
-					if _, exists := sourceTimelys[validatorIndex]; !exists && inclusionDistance <= 5 {
-						sourceTimelys[validatorIndex] = struct{}{}
-					}
-					if _, exists := targetCorrects[validatorIndex]; !exists && targetCorrect {
-						targetCorrects[validatorIndex] = struct{}{}
-					}
-					if _, exists := targetTimelys[validatorIndex]; !exists && targetCorrect && inclusionDistance <= 32 {
-						targetTimelys[validatorIndex] = struct{}{}
+					if _, exists := targetTimelys[committee[int(i)]]; !exists && targetCorrect && inclusionDistance <= 32 {
+						targetTimelys[committee[int(i)]] = struct{}{}
 					}
 				}
 			}
 		}
 	}

-	return votes,
-		headCorrects,
-		headTimelys,
-		sourceTimelys,
-		targetCorrects,
-		targetTimelys,
+	return len(votes),
+		len(headCorrects),
+		len(headTimelys),
+		len(sourceTimelys),
+		len(targetCorrects),
+		len(targetTimelys),
+		votes,
 		participations,
 		nil
 }
@@ -365,18 +282,7 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 		return errors.Wrap(err, "empty sync committee")
 	}

-	for _, validatorIndex := range committee.Validators {
-		if len(c.validators) == 0 {
-			c.summary.SyncCommitteeValidators++
-		} else {
-			if _, exists := c.validators[validatorIndex]; exists {
-				c.summary.SyncCommitteeValidators++
-			}
-		}
-	}
-
 	missed := make(map[phase0.ValidatorIndex]int)
-	missedSlots := make(map[phase0.ValidatorIndex][]phase0.Slot)
 	for _, index := range committee.Validators {
 		missed[index] = 0
 	}
@@ -399,15 +305,9 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 		if err != nil {
 			return errors.Wrapf(err, "failed to obtain sync aggregate for slot %d", slot)
 		}
-		for i := range aggregate.SyncCommitteeBits.Len() {
-			validatorIndex := committee.Validators[int(i)]
-			if _, exists := c.validators[validatorIndex]; !exists {
-				// Not one of ours.
-				continue
-			}
+		for i := uint64(0); i < aggregate.SyncCommitteeBits.Len(); i++ {
 			if !aggregate.SyncCommitteeBits.BitAt(i) {
-				missed[validatorIndex]++
-				missedSlots[validatorIndex] = append(missedSlots[validatorIndex], slot)
+				missed[committee.Validators[int(i)]]++
 			}
 		}
 	}
@@ -416,9 +316,8 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 	for index, count := range missed {
 		if count > 0 {
 			c.summary.SyncCommittee = append(c.summary.SyncCommittee, &epochSyncCommittee{
-				ValidatorIndex: index,
-				Missed:         count,
-				MissedSlots:    missedSlots[index],
+				Index:  index,
+				Missed: count,
 			})
 		}
 	}
@@ -430,7 +329,7 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 			return missedDiff > 0
 		}
 		// Then order by validator index.
-		return c.summary.SyncCommittee[i].ValidatorIndex < c.summary.SyncCommittee[j].ValidatorIndex
+		return c.summary.SyncCommittee[i].Index < c.summary.SyncCommittee[j].Index
 	})

 	return nil
@@ -441,10 +340,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
@@ -488,10 +388,10 @@ func (c *command) setup(ctx context.Context) error {
 }

 func (c *command) processBlobs(ctx context.Context) error {
-	for _, proposal := range c.summary.Proposals {
-		block, err := c.fetchBlock(ctx, fmt.Sprintf("%d", proposal.Slot))
+	for slot := c.summary.FirstSlot; slot <= c.summary.LastSlot; slot++ {
+		block, err := c.fetchBlock(ctx, fmt.Sprintf("%d", slot))
 		if err != nil {
-			return errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", proposal.Slot))
+			return errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", slot))
 		}
 		if block == nil {
 			continue
@@ -501,6 +401,8 @@ func (c *command) processBlobs(ctx context.Context) error {
 			// No blobs in these forks.
 		case spec.DataVersionDeneb:
 			c.summary.Blobs += len(block.Deneb.Message.Body.BlobKZGCommitments)
+		case spec.DataVersionElectra:
+			c.summary.Blobs += len(block.Electra.Message.Body.BlobKZGCommitments)
 		default:
 			return fmt.Errorf("unhandled block version %v", block.Version)
 		}
--- a/cmd/epochsummary.go
+++ b/cmd/epochsummary.go
@@ -46,17 +46,9 @@ In quiet mode this will return 0 if information for the epoch is found, otherwis

 func init() {
 	epochCmd.AddCommand(epochSummaryCmd)
-	epochSummaryFlags(epochSummaryCmd)
-}
-
-func epochSummaryFlags(cmd *cobra.Command) {
-	epochFlags(cmd)
-	cmd.Flags().StringSlice("validators", nil, "the validators for which to obtain a summary")
+	epochFlags(epochSummaryCmd)
 }

 func epochSummaryBindings(cmd *cobra.Command) {
 	epochBindings(cmd)
-	if err := viper.BindPFlag("validators", cmd.Flags().Lookup("validators")); err != nil {
-		panic(err)
-	}
 }
--- a/cmd/exitverify.go
+++ b/cmd/exitverify.go
@@ -47,10 +47,11 @@ In quiet mode this will return 0 if the exit is verified correctly, otherwise 1.
 		errCheck(err, "Failed to obtain signed operation")

 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-			Address:       viper.GetString("connection"),
-			Timeout:       viper.GetDuration("timeout"),
-			AllowInsecure: viper.GetBool("allow-insecure-connections"),
-			LogFallback:   !viper.GetBool("quiet"),
+			Address:           viper.GetString("connection"),
+			Timeout:           viper.GetDuration("timeout"),
+			AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+			CustomSpecSupport: viper.GetBool("custom-spec"),
+			LogFallback:       !viper.GetBool("quiet"),
 		})
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")

--- a/cmd/node/events/input.go
+++ b/cmd/node/events/input.go
@@ -51,10 +51,11 @@ func input(ctx context.Context) (*dataIn, error) {

 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       viper.GetString("connection"),
-		Timeout:       viper.GetDuration("timeout"),
-		AllowInsecure: viper.GetBool("allow-insecure-connections"),
-		LogFallback:   !data.quiet,
+		Address:           viper.GetString("connection"),
+		Timeout:           viper.GetDuration("timeout"),
+		AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+		CustomSpecSupport: viper.GetBool("custom-spec"),
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, err
--- a/cmd/nodeinfo.go
+++ b/cmd/nodeinfo.go
@@ -37,10 +37,11 @@ In quiet mode this will return 0 if the node information can be obtained, otherw
 		ctx := context.Background()

 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-			Address:       viper.GetString("connection"),
-			Timeout:       viper.GetDuration("timeout"),
-			AllowInsecure: viper.GetBool("allow-insecure-connections"),
-			LogFallback:   !viper.GetBool("quiet"),
+			Address:           viper.GetString("connection"),
+			Timeout:           viper.GetDuration("timeout"),
+			AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+			CustomSpecSupport: viper.GetBool("custom-spec"),
+			LogFallback:       !viper.GetBool("quiet"),
 		})
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")

--- a/cmd/proposer/duties/command.go
+++ b/cmd/proposer/duties/command.go
@@ -34,6 +34,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Operation.
 	epoch      string
@@ -62,6 +63,7 @@ func newCommand(_ context.Context) (*command, error) {
 		timeout:                  viper.GetDuration("timeout"),
 		connection:               viper.GetString("connection"),
 		allowInsecureConnections: viper.GetBool("allow-insecure-connections"),
+		customSpecSupport:        viper.GetBool("custom-spec"),
 		epoch:                    viper.GetString("epoch"),
 		slot:                     viper.GetString("slot"),
 		jsonOutput:               viper.GetBool("json"),
--- a/cmd/proposer/duties/process.go
+++ b/cmd/proposer/duties/process.go
@@ -88,10 +88,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
--- a/cmd/root.go
+++ b/cmd/root.go
@@ -136,6 +136,7 @@ func init() {
 	addPersistentFlags()
 }

+//nolint:gocyclo
 func addPersistentFlags() {
 	RootCmd.PersistentFlags().StringVar(&cfgFile, "config", "", "config file (default is $HOME/.ethdo.yaml)")

@@ -252,6 +253,10 @@ func addPersistentFlags() {
 	if err := viper.BindPFlag("allow-insecure-connections", RootCmd.PersistentFlags().Lookup("allow-insecure-connections")); err != nil {
 		panic(err)
 	}
+	RootCmd.PersistentFlags().Bool("custom-spec", false, "allow custom (non-mainnet) beacon node specifications")
+	if err := viper.BindPFlag("custom-spec", RootCmd.PersistentFlags().Lookup("custom-spec")); err != nil {
+		panic(err)
+	}
 }

 // initConfig reads in config file and ENV variables if set.
--- a/cmd/signaturesign.go
+++ b/cmd/signaturesign.go
@@ -19,7 +19,6 @@ import (
 	"os"

 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"github.com/wealdtech/ethdo/util"
@@ -60,8 +59,6 @@ In quiet mode this will return 0 if the data can be signed, otherwise 1.`,
 			account, err = util.ParseAccount(ctx, viper.GetString("account"), util.GetPassphrases(), true)
 		case viper.GetString("private-key") != "":
 			account, err = util.ParseAccount(ctx, viper.GetString("private-key"), nil, true)
-		default:
-			err = errors.New("account or private key must be supplied")
 		}
 		errCheck(err, "Failed to obtain account")

--- a/cmd/signatureverify.go
+++ b/cmd/signatureverify.go
@@ -19,7 +19,6 @@ import (
 	"os"

 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"github.com/wealdtech/ethdo/util"
@@ -72,10 +71,6 @@ In quiet mode this will return 0 if the data can be signed, otherwise 1.`,
 			account, err = util.ParseAccount(ctx, viper.GetString("private-key"), nil, false)
 		case viper.GetString("public-key") != "":
 			account, err = util.ParseAccount(ctx, viper.GetString("public-key"), nil, false)
-		case signatureVerifySigner != "":
-			account, err = util.ParseAccount(ctx, signatureVerifySigner, nil, false)
-		default:
-			err = errors.New("one of account, private-key, public-key, or signer must be supplied")
 		}
 		errCheck(err, "Failed to obtain account")
 		outputIf(viper.GetBool("debug"), fmt.Sprintf("Public key is %#x", account.PublicKey().Marshal()))
--- a/cmd/slot/time/input.go
+++ b/cmd/slot/time/input.go
@@ -53,10 +53,11 @@ func input(ctx context.Context) (*dataIn, error) {
 	// Ethereum 2 client.
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       viper.GetString("connection"),
-		Timeout:       viper.GetDuration("timeout"),
-		AllowInsecure: viper.GetBool("allow-insecure-connections"),
-		LogFallback:   !data.quiet,
+		Address:           viper.GetString("connection"),
+		Timeout:           viper.GetDuration("timeout"),
+		AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+		CustomSpecSupport: viper.GetBool("custom-spec"),
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, err
--- a/cmd/synccommittee/inclusion/command.go
+++ b/cmd/synccommittee/inclusion/command.go
@@ -33,6 +33,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Input.
 	validator string
@@ -51,9 +52,10 @@ type command struct {

 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
-		quiet:   viper.GetBool("quiet"),
-		verbose: viper.GetBool("verbose"),
-		debug:   viper.GetBool("debug"),
+		quiet:             viper.GetBool("quiet"),
+		verbose:           viper.GetBool("verbose"),
+		debug:             viper.GetBool("debug"),
+		customSpecSupport: viper.GetBool("custom-spec"),
 	}

 	// Timeout.
--- a/cmd/synccommittee/inclusion/process.go
+++ b/cmd/synccommittee/inclusion/process.go
@@ -120,6 +120,13 @@ func (c *command) process(ctx context.Context) error {
 				} else {
 					c.inclusions = append(c.inclusions, 2)
 				}
+			case spec.DataVersionElectra:
+				aggregate = block.Electra.Message.Body.SyncAggregate
+				if aggregate.SyncCommitteeBits.BitAt(c.committeeIndex) {
+					c.inclusions = append(c.inclusions, 1)
+				} else {
+					c.inclusions = append(c.inclusions, 2)
+				}
 			default:
 				return fmt.Errorf("unhandled block version %v", block.Version)
 			}
@@ -134,10 +141,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return err
--- a/cmd/synccommittee/members/input.go
+++ b/cmd/synccommittee/members/input.go
@@ -52,10 +52,11 @@ func input(ctx context.Context) (*dataIn, error) {
 	// Ethereum 2 client.
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       viper.GetString("connection"),
-		Timeout:       viper.GetDuration("timeout"),
-		AllowInsecure: viper.GetBool("allow-insecure-connections"),
-		LogFallback:   !data.quiet,
+		Address:           viper.GetString("connection"),
+		Timeout:           viper.GetDuration("timeout"),
+		AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+		CustomSpecSupport: viper.GetBool("custom-spec"),
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, err
--- a/cmd/validator/credentials/get/command.go
+++ b/cmd/validator/credentials/get/command.go
@@ -35,6 +35,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Data access.
 	consensusClient    eth2client.Service
@@ -46,9 +47,10 @@ type command struct {

 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
-		quiet:   viper.GetBool("quiet"),
-		verbose: viper.GetBool("verbose"),
-		debug:   viper.GetBool("debug"),
+		quiet:             viper.GetBool("quiet"),
+		verbose:           viper.GetBool("verbose"),
+		debug:             viper.GetBool("debug"),
+		customSpecSupport: viper.GetBool("custom-spec"),
 	}

 	// Timeout.
--- a/cmd/validator/credentials/get/process.go
+++ b/cmd/validator/credentials/get/process.go
@@ -49,10 +49,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the consensus node.
 	c.consensusClient, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to consensus node")
--- a/cmd/validator/credentials/set/command.go
+++ b/cmd/validator/credentials/set/command.go
@@ -54,6 +54,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Information required to generate the operations.
 	withdrawalAddress bellatrix.ExecutionAddress
@@ -78,6 +79,7 @@ func newCommand(_ context.Context) (*command, error) {
 		timeout:                  viper.GetDuration("timeout"),
 		connection:               viper.GetString("connection"),
 		allowInsecureConnections: viper.GetBool("allow-insecure-connections"),
+		customSpecSupport:        viper.GetBool("custom-spec"),
 		prepareOffline:           viper.GetBool("prepare-offline"),
 		account:                  viper.GetString("account"),
 		withdrawalAccount:        viper.GetString("withdrawal-account"),
--- a/cmd/validator/credentials/set/process.go
+++ b/cmd/validator/credentials/set/process.go
@@ -482,17 +482,17 @@ func (c *command) generateOperationFromSeedAndPath(ctx context.Context,
 	validator, exists := validators[validatorPubkey]
 	if !exists {
 		if c.debug {
-			fmt.Fprintf(os.Stderr, "no validator found with public key %s at path %s\n", validatorPubkey, path)
+			fmt.Fprintf(os.Stderr, "No validator found with public key %s at path %s\n", validatorPubkey, path)
 		}
 		return false, nil
 	}

-	if c.verbose {
+	if c.verbose || c.debug {
 		fmt.Fprintf(os.Stderr, "Validator %d found with public key %s at path %s\n", validator.Index, validatorPubkey, path)
 	}

 	if validator.WithdrawalCredentials[0] != byte(0) {
-		if c.debug {
+		if c.verbose || c.debug {
 			fmt.Fprintf(os.Stderr, "Validator %s has non-BLS withdrawal credentials %#x\n", validatorPubkey, validator.WithdrawalCredentials)
 		}
 		return false, nil
@@ -523,7 +523,7 @@ func (c *command) generateOperationFromSeedAndPath(ctx context.Context,
 	withdrawalCredentials := ethutil.SHA256(withdrawalPubkey)
 	withdrawalCredentials[0] = byte(0) // BLS_WITHDRAWAL_PREFIX
 	if !bytes.Equal(withdrawalCredentials, validator.WithdrawalCredentials) {
-		if c.verbose && c.privateKey == "" {
+		if (c.verbose || c.debug) && c.privateKey == "" {
 			fmt.Fprintf(os.Stderr, "Validator %s withdrawal credentials %#x do not match expected credentials, cannot update\n", validatorPubkey, validator.WithdrawalCredentials)
 		}
 		return false, nil
@@ -538,6 +538,10 @@ func (c *command) generateOperationFromSeedAndPath(ctx context.Context,
 		return false, err
 	}

+	if c.verbose || c.debug {
+		fmt.Fprintf(os.Stderr, "Withdrawal credentials change operation generated for validator with public key %s at path %s\n", validatorPubkey, path)
+	}
+
 	return true, nil
 }

@@ -727,10 +731,11 @@ func (c *command) setup(ctx context.Context) error {
 	// Connect to the consensus node.
 	var err error
 	c.consensusClient, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return err
--- a/cmd/validator/depositdata/output.go
+++ b/cmd/validator/depositdata/output.go
@@ -170,7 +170,7 @@ func validatorDepositDataOutputJSON(datum *dataOut) (string, error) {
 	if datum.depositDataRoot == nil {
 		return "", errors.New("deposit data root required")
 	}
-	if datum.depositMessageRoot == nil {
+	if datum.depositDataRoot == nil {
 		return "", errors.New("deposit message root required")
 	}
 	if datum.forkVersion == nil {
--- a/cmd/validator/duties/input.go
+++ b/cmd/validator/duties/input.go
@@ -28,8 +28,9 @@ type dataIn struct {
 	verbose bool
 	debug   bool
 	// Ethereum 2 connection.
-	eth2Client    string
-	allowInsecure bool
+	eth2Client        string
+	allowInsecure     bool
+	customSpecSupport bool
 	// Operation.
 	account string
 	pubKey  string
@@ -50,6 +51,7 @@ func input(_ context.Context) (*dataIn, error) {
 	// Ethereum 2 connection.
 	data.eth2Client = viper.GetString("connection")
 	data.allowInsecure = viper.GetBool("allow-insecure-connections")
+	data.customSpecSupport = viper.GetBool("custom-spec")

 	// Account.
 	data.account = viper.GetString("account")
--- a/cmd/validator/duties/process.go
+++ b/cmd/validator/duties/process.go
@@ -32,10 +32,11 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {

 	// Ethereum 2 client.
 	eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       data.eth2Client,
-		Timeout:       data.timeout,
-		AllowInsecure: data.allowInsecure,
-		LogFallback:   !data.quiet,
+		Address:           data.eth2Client,
+		Timeout:           data.timeout,
+		AllowInsecure:     data.allowInsecure,
+		CustomSpecSupport: data.customSpecSupport,
+		LogFallback:       !data.quiet,
 	})
 	if err != nil {
 		return nil, err
--- a/cmd/validator/exit/command.go
+++ b/cmd/validator/exit/command.go
@@ -50,6 +50,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Information required to generate the operations.
 	chainInfo *beacon.ChainInfo
@@ -73,6 +74,7 @@ func newCommand(_ context.Context) (*command, error) {
 		timeout:                  viper.GetDuration("timeout"),
 		connection:               viper.GetString("connection"),
 		allowInsecureConnections: viper.GetBool("allow-insecure-connections"),
+		customSpecSupport:        viper.GetBool("custom-spec"),
 		prepareOffline:           viper.GetBool("prepare-offline"),
 		passphrases:              util.GetPassphrases(),
 		mnemonic:                 viper.GetString("mnemonic"),
--- a/cmd/validator/exit/process.go
+++ b/cmd/validator/exit/process.go
@@ -595,10 +595,11 @@ func (c *command) setup(ctx context.Context) error {
 	// Connect to the consensus node.
 	var err error
 	c.consensusClient, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return err
--- a/cmd/validator/expectation/command.go
+++ b/cmd/validator/expectation/command.go
@@ -35,6 +35,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Input.
 	validators int64
--- a/cmd/validator/expectation/process.go
+++ b/cmd/validator/expectation/process.go
@@ -125,10 +125,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
--- a/cmd/validator/keycheck/process.go
+++ b/cmd/validator/keycheck/process.go
@@ -101,7 +101,7 @@ func checkMnemonic(ctx context.Context, debug bool, validatorWithdrawalCredentia
 	// Create seed from mnemonic and passphrase.
 	seed := bip39.NewSeed(mnemonic, mnemonicPassphrase)
 	// Check first 1024 indices.
-	for i := range 1024 {
+	for i := 0; i < 1024; i++ {
 		path := fmt.Sprintf("m/12381/3600/%d/0", i)
 		if debug {
 			fmt.Printf("Checking path %s\n", path)
--- a/cmd/validator/summary/command.go
+++ b/cmd/validator/summary/command.go
@@ -34,6 +34,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Operation.
 	epoch      string
@@ -131,6 +132,7 @@ func newCommand(_ context.Context) (*command, error) {

 	c.connection = viper.GetString("connection")
 	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+	c.customSpecSupport = viper.GetBool("custom-spec")

 	c.epoch = viper.GetString("epoch")
 	c.validators = viper.GetStringSlice("validators")
--- a/cmd/validator/summary/process.go
+++ b/cmd/validator/summary/process.go
@@ -243,16 +243,24 @@ func (c *command) processAttesterDutiesSlot(ctx context.Context,
 		return err
 	}
 	for _, attestation := range attestations {
-		if _, exists := dutiesBySlot[attestation.Data.Slot]; !exists {
+		attestationData, err := attestation.Data()
+		if err != nil {
+			continue
+		}
+		aggregationBits, err := attestation.AggregationBits()
+		if err != nil {
+			continue
+		}
+		if _, exists := dutiesBySlot[attestationData.Slot]; !exists {
 			// We do not have any attestations for this slot.
 			continue
 		}
-		if _, exists := dutiesBySlot[attestation.Data.Slot][attestation.Data.Index]; !exists {
+		if _, exists := dutiesBySlot[attestationData.Slot][attestationData.Index]; !exists {
 			// We do not have any attestations for this committee.
 			continue
 		}
-		for _, duty := range dutiesBySlot[attestation.Data.Slot][attestation.Data.Index] {
-			if attestation.AggregationBits.BitAt(duty.ValidatorCommitteeIndex) {
+		for _, duty := range dutiesBySlot[attestationData.Slot][attestationData.Index] {
+			if aggregationBits.BitAt(duty.ValidatorCommitteeIndex) {
 				// Found it.
 				if _, exists := votes[duty.ValidatorIndex]; exists {
 					// Duplicate; ignore.
@@ -261,17 +269,17 @@ func (c *command) processAttesterDutiesSlot(ctx context.Context,
 				votes[duty.ValidatorIndex] = struct{}{}

 				// Update the metrics for the attestation.
-				index := int(attestation.Data.Slot - c.chainTime.FirstSlotOfEpoch(c.summary.Epoch))
+				index := int(attestationData.Slot - c.chainTime.FirstSlotOfEpoch(c.summary.Epoch))
 				c.summary.Slots[index].Attestations.Included++
 				inclusionDelay := slot - duty.Slot

 				fault := &validatorFault{
 					Validator:         duty.ValidatorIndex,
-					AttestationData:   attestation.Data,
+					AttestationData:   attestationData,
 					InclusionDistance: int(inclusionDelay),
 				}

-				headCorrect, err := util.AttestationHeadCorrect(ctx, headersCache, attestation)
+				headCorrect, err := util.AttestationHeadCorrect(ctx, headersCache, attestationData)
 				if err != nil {
 					return errors.Wrap(err, "failed to calculate if attestation had correct head vote")
 				}
@@ -295,7 +303,7 @@ func (c *command) processAttesterDutiesSlot(ctx context.Context,
 					c.summary.UntimelySourceValidators = append(c.summary.UntimelySourceValidators, fault)
 				}

-				targetCorrect, err := util.AttestationTargetCorrect(ctx, headersCache, c.chainTime, attestation)
+				targetCorrect, err := util.AttestationTargetCorrect(ctx, headersCache, c.chainTime, attestationData)
 				if err != nil {
 					return errors.Wrap(err, "failed to calculate if attestation had correct target vote")
 				}
@@ -399,10 +407,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
--- a/cmd/validator/withdrawal/command.go
+++ b/cmd/validator/withdrawal/command.go
@@ -39,6 +39,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Processing.
 	consensusClient          consensusclient.Service
@@ -60,6 +61,7 @@ func newCommand(_ context.Context) (*command, error) {
 		timeout:                  viper.GetDuration("timeout"),
 		connection:               viper.GetString("connection"),
 		allowInsecureConnections: viper.GetBool("allow-insecure-connections"),
+		customSpecSupport:        viper.GetBool("custom-spec"),
 		validator:                viper.GetString("validator"),
 		res:                      &res{},
 	}
--- a/cmd/validator/withdrawal/process.go
+++ b/cmd/validator/withdrawal/process.go
@@ -129,10 +129,11 @@ func (c *command) setup(ctx context.Context) error {
 	// Connect to the consensus node.
 	var err error
 	c.consensusClient, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return err
--- a/cmd/validator/yield/command.go
+++ b/cmd/validator/yield/command.go
@@ -33,6 +33,7 @@ type command struct {
 	timeout                  time.Duration
 	connection               string
 	allowInsecureConnections bool
+	customSpecSupport        bool

 	// Input.
 	validators string
@@ -76,6 +77,7 @@ func newCommand(_ context.Context) (*command, error) {

 	c.connection = viper.GetString("connection")
 	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+	c.customSpecSupport = viper.GetBool("custom-spec")

 	c.validators = viper.GetString("validators")

--- a/cmd/validator/yield/process.go
+++ b/cmd/validator/yield/process.go
@@ -114,10 +114,11 @@ func (c *command) setup(ctx context.Context) error {

 	// Connect to the client.
 	c.eth2Client, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-		Address:       c.connection,
-		Timeout:       c.timeout,
-		AllowInsecure: c.allowInsecureConnections,
-		LogFallback:   !c.quiet,
+		Address:           c.connection,
+		Timeout:           c.timeout,
+		AllowInsecure:     c.allowInsecureConnections,
+		CustomSpecSupport: c.customSpecSupport,
+		LogFallback:       !c.quiet,
 	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect to beacon node")
--- a/cmd/validatorinfo.go
+++ b/cmd/validatorinfo.go
@@ -47,10 +47,11 @@ In quiet mode this will return 0 if the validator information can be obtained, o
 		ctx := context.Background()

 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
-			Address:       viper.GetString("connection"),
-			Timeout:       viper.GetDuration("timeout"),
-			AllowInsecure: viper.GetBool("allow-insecure-connections"),
-			LogFallback:   !viper.GetBool("quiet"),
+			Address:           viper.GetString("connection"),
+			Timeout:           viper.GetDuration("timeout"),
+			AllowInsecure:     viper.GetBool("allow-insecure-connections"),
+			CustomSpecSupport: viper.GetBool("custom-spec"),
+			LogFallback:       !viper.GetBool("quiet"),
 		})
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")

--- a/cmd/version.go
+++ b/cmd/version.go
@@ -24,7 +24,7 @@ import (

 // ReleaseVersion is the release version of the codebase.
 // Usually overridden by tag names when building binaries.
-var ReleaseVersion = "local build (latest release 1.36.4)"
+var ReleaseVersion = "local build (latest release 1.35.3)"

 // versionCmd represents the version command.
 var versionCmd = &cobra.Command{
--- a/cmd/wallet/create/process.go
+++ b/cmd/wallet/create/process.go
@@ -1,4 +1,4 @@
-// Copyright © 2019 - 2024 Weald Technology Trading
+// Copyright © 2019, 2020 Weald Technology Trading
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -24,7 +24,6 @@ import (
 	distributed "github.com/wealdtech/go-eth2-wallet-distributed"
 	keystorev4 "github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4"
 	hd "github.com/wealdtech/go-eth2-wallet-hd/v2"
-	keystore "github.com/wealdtech/go-eth2-wallet-keystore"
 	nd "github.com/wealdtech/go-eth2-wallet-nd/v2"
 	"golang.org/x/text/unicode/norm"
 )
@@ -41,8 +40,6 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		return processHD(ctx, data)
 	case "distributed":
 		return processDistributed(ctx, data)
-	case "keystore":
-		return processKeystore(ctx, data)
 	default:
 		return nil, errors.New("wallet type not supported")
 	}
@@ -135,16 +132,3 @@ func processDistributed(ctx context.Context, data *dataIn) (*dataOut, error) {

 	return results, nil
 }
-
-func processKeystore(ctx context.Context, data *dataIn) (*dataOut, error) {
-	if data == nil {
-		return nil, errors.New("no data")
-	}
-
-	results := &dataOut{}
-
-	if _, err := keystore.CreateWallet(ctx, data.walletName, data.store, keystorev4.New()); err != nil {
-		return nil, err
-	}
-	return results, nil
-}
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -47,7 +47,7 @@ $ ethdo wallet batch --wallet="Validators" ---passphrase="my account secret" --b
 `ethdo wallet create` creates a new wallet with the given parameters.  Options for creating a wallet include:

 - `wallet`: the name of the wallet to create
- `type`: the type of wallet to create.  This can be either "nd" for a non-deterministic wallet, where private keys are generated randomly, "hd" for a hierarchical deterministic wallet, where private keys are generated from a seed and path as per [EIP-2333](https://eips.ethereum.org/EIPS/eip-2333), "keystore" for a wallet where data is written in the [EIP=2335](https://eips.ethereum.org/EIPS/eip-2335) format, or "distributed" for a wallet used by [Dirk](https://github.com/wealdtech/dirk) (defaults to "nd")
+- `type`: the type of wallet to create.  This can be either "nd" for a non-deterministic wallet, where private keys are generated randomly, or "hd" for a hierarchical deterministic wallet, where private keys are generated from a seed and path as per [EIP-2333](https://eips.ethereum.org/EIPS/eip-2333) (defaults to "nd")
 - `wallet-passphrase`: the passphrase for of the wallet.  This is required for hierarchical deterministic wallets, to protect the seed
 - `mnemonic`: for hierarchical deterministic wallets only, use a pre-defined 24-word [BIP-39 seed phrase](https://en.bitcoin.it/wiki/Seed_phrase) to create the wallet, along with an additional "seed extension" phrase if required.  **Warning** The same mnemonic can be used to create multiple wallets, in which case they will generate the same keys.

@@ -183,7 +183,6 @@ $ ethdo account create --account="Personal wallet/Operations" --wallet-passphras
 - `show-private-key`: show the private of the derived account.  **Warning** displaying private keys, especially those derived from seeds held on hardware wallets, can expose your Ether to risk of being stolen.  Only use this option if you are sure you understand the risks involved
 - `show-withdrawal-credentials`: show the withdrawal credentials of the derived account
 - `generate-keystore`: generate a keystore for the account
- `json`: output the generated keystore to stdout

 ```sh
 $ ethdo account derive --mnemonic="abandon ... abandon art" --path="m/12381/3600/0/0"
--- a/go.mod
+++ b/go.mod
@@ -1,106 +1,106 @@
 module github.com/wealdtech/ethdo

-go 1.22.7
+go 1.21

-toolchain go1.23.2
+toolchain go1.21.6

 require (
-	github.com/attestantio/go-eth2-client v0.22.0
-	github.com/ferranbt/fastssz v0.1.4
+	github.com/attestantio/go-eth2-client v0.21.4-0.20240514220516-2646ce28c3e4
+	github.com/ferranbt/fastssz v0.1.3
 	github.com/gofrs/uuid v4.4.0+incompatible
 	github.com/google/uuid v1.6.0
 	github.com/hako/durafmt v0.0.0-20210608085754-5c1018a4e16b
-	github.com/herumi/bls-eth-go-binary v1.36.1
+	github.com/herumi/bls-eth-go-binary v1.33.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354
 	github.com/pkg/errors v0.9.1
-	github.com/prysmaticlabs/go-bitfield v0.0.0-20240618144021-706c95b2dd15
+	github.com/prysmaticlabs/go-bitfield v0.0.0-20240328144219-a1caa50c3a1e
 	github.com/prysmaticlabs/go-ssz v0.0.0-20210121151755-f6208871c388
-	github.com/rs/zerolog v1.33.0
-	github.com/shopspring/decimal v1.4.0
-	github.com/spf13/cobra v1.8.1
+	github.com/rs/zerolog v1.32.0
+	github.com/shopspring/decimal v1.3.1
+	github.com/spf13/cobra v1.8.0
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.19.0
-	github.com/stretchr/testify v1.10.0
+	github.com/spf13/viper v1.18.2
+	github.com/stretchr/testify v1.8.4
 	github.com/tyler-smith/go-bip39 v1.1.0
 	github.com/wealdtech/go-bytesutil v1.2.1
 	github.com/wealdtech/go-ecodec v1.1.4
 	github.com/wealdtech/go-eth2-types/v2 v2.8.2
 	github.com/wealdtech/go-eth2-util v1.8.2
-	github.com/wealdtech/go-eth2-wallet v1.17.0
-	github.com/wealdtech/go-eth2-wallet-dirk v1.5.1
+	github.com/wealdtech/go-eth2-wallet v1.16.0
+	github.com/wealdtech/go-eth2-wallet-dirk v1.4.7
 	github.com/wealdtech/go-eth2-wallet-distributed v1.2.1
 	github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4 v1.4.1
 	github.com/wealdtech/go-eth2-wallet-hd/v2 v2.7.0
-	github.com/wealdtech/go-eth2-wallet-keystore v1.0.0
 	github.com/wealdtech/go-eth2-wallet-nd/v2 v2.5.0
 	github.com/wealdtech/go-eth2-wallet-store-filesystem v1.18.1
 	github.com/wealdtech/go-eth2-wallet-store-s3 v1.12.0
 	github.com/wealdtech/go-eth2-wallet-store-scratch v1.7.2
-	github.com/wealdtech/go-eth2-wallet-types/v2 v2.12.0
+	github.com/wealdtech/go-eth2-wallet-types/v2 v2.11.0
 	github.com/wealdtech/go-string2eth v1.2.1
-	golang.org/x/text v0.21.0
+	golang.org/x/text v0.15.0
 )

 require (
-	github.com/aws/aws-sdk-go v1.55.5 // indirect
+	github.com/aws/aws-sdk-go v1.51.1 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/dgraph-io/ristretto v0.2.0 // indirect
+	github.com/dgraph-io/ristretto v0.1.1 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/emicklei/dot v1.6.4 // indirect
-	github.com/fsnotify/fsnotify v1.8.0 // indirect
-	github.com/go-logr/logr v1.4.2 // indirect
+	github.com/fatih/color v1.16.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/goccy/go-yaml v1.15.12 // indirect
+	github.com/goccy/go-yaml v1.9.2 // indirect
+	github.com/golang/glog v1.2.0 // indirect
+	github.com/golang/protobuf v1.5.4 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/holiman/uint256 v1.3.2 // indirect
+	github.com/holiman/uint256 v1.2.4 // indirect
 	github.com/huandu/go-clone v1.7.2 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	github.com/jackc/puddle/v2 v2.2.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.9 // indirect
-	github.com/magiconair/properties v1.8.9 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
+	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/minio/highwayhash v1.0.3 // indirect
+	github.com/minio/highwayhash v1.0.2 // indirect
 	github.com/minio/sha256-simd v1.0.1 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/pelletier/go-toml/v2 v2.2.3 // indirect
-	github.com/pk910/dynamic-ssz v0.0.5 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.1 // indirect
+	github.com/pk910/dynamic-ssz v0.0.4 // indirect
 	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/prometheus/client_golang v1.20.5 // indirect
-	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.61.0 // indirect
-	github.com/prometheus/procfs v0.15.1 // indirect
+	github.com/prometheus/client_golang v1.19.0 // indirect
+	github.com/prometheus/client_model v0.6.0 // indirect
+	github.com/prometheus/common v0.50.0 // indirect
+	github.com/prometheus/procfs v0.13.0 // indirect
 	github.com/protolambda/zssz v0.1.5 // indirect
 	github.com/r3labs/sse/v2 v2.10.0 // indirect
-	github.com/sagikazarmark/locafero v0.6.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
 	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/shibukawa/configdir v0.0.0-20170330084843-e180dbdc8da0 // indirect
 	github.com/sourcegraph/conc v0.3.0 // indirect
 	github.com/spf13/afero v1.11.0 // indirect
-	github.com/spf13/cast v1.7.1 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
 	github.com/subosito/gotenv v1.6.0 // indirect
 	github.com/wealdtech/eth2-signer-api v1.7.2 // indirect
 	github.com/wealdtech/go-indexer v1.1.0 // indirect
-	go.opentelemetry.io/auto/sdk v1.1.0 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.58.0 // indirect
-	go.opentelemetry.io/otel v1.33.0 // indirect
-	go.opentelemetry.io/otel/metric v1.33.0 // indirect
-	go.opentelemetry.io/otel/trace v1.33.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.49.0 // indirect
+	go.opentelemetry.io/otel v1.24.0 // indirect
+	go.opentelemetry.io/otel/metric v1.24.0 // indirect
+	go.opentelemetry.io/otel/trace v1.24.0 // indirect
 	go.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.31.0 // indirect
-	golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67 // indirect
-	golang.org/x/net v0.33.0 // indirect
-	golang.org/x/sync v0.10.0 // indirect
-	golang.org/x/sys v0.28.0 // indirect
-	google.golang.org/genproto/googleapis/api v0.0.0-20241219192143-6b3ec007d9bb // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20241219192143-6b3ec007d9bb // indirect
-	google.golang.org/grpc v1.69.2 // indirect
-	google.golang.org/protobuf v1.36.0 // indirect
+	golang.org/x/crypto v0.23.0 // indirect
+	golang.org/x/exp v0.0.0-20240314144324-c7f7c6466f7f // indirect
+	golang.org/x/net v0.23.0 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/sys v0.20.0 // indirect
+	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240314234333-6e1732d8331c // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240314234333-6e1732d8331c // indirect
+	google.golang.org/grpc v1.62.1 // indirect
+	google.golang.org/protobuf v1.33.0 // indirect
 	gopkg.in/Knetic/govaluate.v3 v3.0.0 // indirect
 	gopkg.in/cenkalti/backoff.v1 v1.1.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
--- a/go.sum
+++ b/go.sum
@@ -1,41 +1,56 @@
-github.com/attestantio/go-eth2-client v0.22.0 h1:KmF9kPNNWWGfE7l1BP7pXps4EOXgKnYeFGR0/WbyFhY=
-github.com/attestantio/go-eth2-client v0.22.0/go.mod h1:d7ZPNrMX8jLfIgML5u7QZxFo2AukLM+5m08iMaLdqb8=
-github.com/aws/aws-sdk-go v1.55.5 h1:KKUZBfBoyqy5d3swXyiC7Q76ic40rYcbqH7qjh59kzU=
-github.com/aws/aws-sdk-go v1.55.5/go.mod h1:eRwEWoyTWFMVYVQzKMNHWP5/RV4xIUGMQfXQHfHkpNU=
+github.com/attestantio/go-eth2-client v0.21.4-0.20240514220516-2646ce28c3e4 h1:tvLDLWLMMdo/UzMPCX+a9wh+zdAZzS2NEOqAaq9m5BY=
+github.com/attestantio/go-eth2-client v0.21.4-0.20240514220516-2646ce28c3e4/go.mod h1:RssbJ8txdfZ+O7cIjOKCvizcTWHzgPuJNByrwtQ6tBQ=
+github.com/attestantio/go-eth2-client v0.21.4 h1:1QW4f3NXCcbUsxmRBElotTjSIhRwLsmdowUvxJnyaJU=
+github.com/attestantio/go-eth2-client v0.21.4/go.mod h1:d7ZPNrMX8jLfIgML5u7QZxFo2AukLM+5m08iMaLdqb8=
+github.com/aws/aws-sdk-go v1.51.1 h1:AFvTihcDPanvptoKS09a4yYmNtPm3+pXlk6uYHmZiFk=
+github.com/aws/aws-sdk-go v1.51.1/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
-github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
+github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/cpuguy83/go-md2man/v2 v2.0.4/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
 github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dgraph-io/ristretto v0.2.0 h1:XAfl+7cmoUDWW/2Lx8TGZQjjxIQ2Ley9DSf52dru4WE=
-github.com/dgraph-io/ristretto v0.2.0/go.mod h1:8uBHCU/PBV4Ag0CJrP47b9Ofby5dqWNh4FicAdoqFNU=
-github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13 h1:fAjc9m62+UWV/WAFKLNi6ZS0675eEUC9y3AlwSbQu1Y=
-github.com/dgryski/go-farm v0.0.0-20200201041132-a6ae2369ad13/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
+github.com/dgraph-io/ristretto v0.1.1 h1:6CWw5tJNgpegArSHpNHJKldNeq03FQCwYvfMVWajOK8=
+github.com/dgraph-io/ristretto v0.1.1/go.mod h1:S1GPSBCYCIhmVNfcth17y2zZtQT6wzkzgwUve0VDWWA=
+github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2 h1:tdlZCpZ/P9DhczCTSixgIKmwPv6+wP5DGjqLYw5SUiA=
+github.com/dgryski/go-farm v0.0.0-20190423205320-6a90982ecee2/go.mod h1:SqUrOPUnsFjfmXRMNPybcSiG0BgUW2AuFH8PAnS2iTw=
+github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
-github.com/emicklei/dot v1.6.4 h1:cG9ycT67d9Yw22G+mAb4XiuUz6E6H1S0zePp/5Cwe/c=
-github.com/emicklei/dot v1.6.4/go.mod h1:DeV7GvQtIw4h2u73RKBkkFdvVAz0D9fzeJrgPW6gy/s=
-github.com/ferranbt/fastssz v0.1.4 h1:OCDB+dYDEQDvAgtAGnTSidK1Pe2tW3nFV40XyMkTeDY=
-github.com/ferranbt/fastssz v0.1.4/go.mod h1:Ea3+oeoRGGLGm5shYAeDgu6PGUlcvQhE2fILyD9+tGg=
+github.com/fatih/color v1.10.0/go.mod h1:ELkj/draVOlAH/xkhN6mQ50Qd0MPOk5AAr3maGEBuJM=
+github.com/fatih/color v1.16.0 h1:zmkK9Ngbjj+K0yRhTVONQh1p/HknKYSlNT+vZCzyokM=
+github.com/fatih/color v1.16.0/go.mod h1:fL2Sau1YI5c0pdGEVCbKQbLXB6edEj1ZgiY4NijnWvE=
+github.com/ferranbt/fastssz v0.1.3 h1:ZI+z3JH05h4kgmFXdHuR1aWYsgrg7o+Fw7/NCzM16Mo=
+github.com/ferranbt/fastssz v0.1.3/go.mod h1:0Y9TEd/9XuFlh7mskMPfXiI2Dkw4Ddg9EyXt1W7MRvE=
 github.com/frankban/quicktest v1.14.6 h1:7Xjx+VpznH+oBnejlPUj8oUpdxnVs4f8XU8WnHkI4W8=
 github.com/frankban/quicktest v1.14.6/go.mod h1:4ptaffx2x8+WTWXmUCuVU6aPUX1/Mz7zb5vbUoiM6w0=
-github.com/fsnotify/fsnotify v1.8.0 h1:dAwr6QBTBZIkG8roQaJjGof0pp0EeF+tNV7YBP3F/8M=
-github.com/fsnotify/fsnotify v1.8.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
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 github.com/go-logr/logr v1.2.2/go.mod h1:jdQByPbusPIv2/zmleS9BjJVeZ6kBagPoEUsqbVz/1A=
-github.com/go-logr/logr v1.4.2 h1:6pFjapn8bFcIbiKo3XT4j/BhANplGihG6tvd+8rYgrY=
-github.com/go-logr/logr v1.4.2/go.mod h1:9T104GzyrTigFIr8wt5mBrctHMim0Nb2HLGrmQ40KvY=
+github.com/go-logr/logr v1.4.1 h1:pKouT5E8xu9zeFC39JXRDukb6JFQPXM5p5I91188VAQ=
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-github.com/goccy/go-yaml v1.15.12 h1:KLUSwfrUcTU6F8sAkf23OIPYC6aFVMNFSu4btROEm6w=
-github.com/goccy/go-yaml v1.15.12/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
+github.com/go-playground/assert/v2 v2.0.1/go.mod h1:VDjEfimB/XKnb+ZQfWdccd7VUvScMdVu0Titje2rxJ4=
+github.com/go-playground/locales v0.13.0 h1:HyWk6mgj5qFqCT5fjGBuRArbVDfE4hi8+e8ceBS/t7Q=
+github.com/go-playground/locales v0.13.0/go.mod h1:taPMhCMXrRLJO55olJkUXHZBHCxTMfnGwq/HNwmWNS8=
+github.com/go-playground/universal-translator v0.17.0 h1:icxd5fm+REJzpZx7ZfpaD876Lmtgy7VtROAbHHXk8no=
+github.com/go-playground/universal-translator v0.17.0/go.mod h1:UkSxE5sNxxRwHyU+Scu5vgOQjsIJAF8j9muTVoKLVtA=
+github.com/go-playground/validator/v10 v10.4.1 h1:pH2c5ADXtd66mxoE0Zm9SUhxE20r7aM3F26W0hOn+GE=
+github.com/go-playground/validator/v10 v10.4.1/go.mod h1:nlOn6nFhuKACm19sB/8EGNn9GlaMV7XkbRSipzJ0Ii4=
+github.com/goccy/go-yaml v1.9.2 h1:2Njwzw+0+pjU2gb805ZC1B/uBuAs2VcZ3K+ZgHwDs7w=
+github.com/goccy/go-yaml v1.9.2/go.mod h1:U/jl18uSupI5rdI2jmuCswEA2htH9eXfferR3KfscvA=
 github.com/godbus/dbus/v5 v5.0.4/go.mod h1:xhWf0FNVPg57R7Z0UbKHbJfkEywrmjJnf7w5xrFpKfA=
 github.com/gofrs/uuid v4.4.0+incompatible h1:3qXRTX8/NbyulANqlc0lchS1gqAVxRgsuW1YrTJupqA=
 github.com/gofrs/uuid v4.4.0+incompatible/go.mod h1:b2aQJv3Z4Fp6yNu3cdSllBxTCLRxnplIgP/c0N/04lM=
+github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b/go.mod h1:SBH7ygxi8pfUlaOkMMuAQtPIUF8ecWP5IEl/CR7VP2Q=
+github.com/golang/glog v1.2.0 h1:uCdmnmatrKCgMBlM4rMuJZWOkPDqdbZPnrMXDY4gI68=
+github.com/golang/glog v1.2.0/go.mod h1:6AhwSGph0fcJtXVM/PEHPqZlFeoLxhs7/t5UDAwmO+w=
 github.com/golang/protobuf v1.5.4 h1:i7eJL8qZTpSEXOPTxNKhASYpMn+8e5Q6AdndVa1dWek=
 github.com/golang/protobuf v1.5.4/go.mod h1:lnTiLA8Wa4RWRcIUkrtSVa5nRhsEGBg48fD6rSs7xps=
 github.com/golang/snappy v0.0.4 h1:yAGX7huGHXlcLOEtBnF4w7FQwA26wojNCwOYAEhLjQM=
@@ -48,10 +63,10 @@ github.com/hako/durafmt v0.0.0-20210608085754-5c1018a4e16b h1:wDUNC2eKiL35DbLvsD
 github.com/hako/durafmt v0.0.0-20210608085754-5c1018a4e16b/go.mod h1:VzxiSdG6j1pi7rwGm/xYI5RbtpBgM8sARDXlvEvxlu0=
 github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
-github.com/herumi/bls-eth-go-binary v1.36.1 h1:SfLjxbO1fWkKtKS7J3Ezd1/5QXrcaTZgWynxdSe10hQ=
-github.com/herumi/bls-eth-go-binary v1.36.1/go.mod h1:luAnRm3OsMQeokhGzpYmc0ZKwawY7o87PUEP11Z7r7U=
-github.com/holiman/uint256 v1.3.2 h1:a9EgMPSC1AAaj1SZL5zIQD3WbwTuHrMGOerLjGmM/TA=
-github.com/holiman/uint256 v1.3.2/go.mod h1:EOMSn4q6Nyt9P6efbI3bueV4e1b3dGlUCXeiRV4ng7E=
+github.com/herumi/bls-eth-go-binary v1.33.0 h1:fHoysK+WbL/FQIJoVGECGd2lBLa2De7YjAGZljI2vzQ=
+github.com/herumi/bls-eth-go-binary v1.33.0/go.mod h1:luAnRm3OsMQeokhGzpYmc0ZKwawY7o87PUEP11Z7r7U=
+github.com/holiman/uint256 v1.2.4 h1:jUc4Nk8fm9jZabQuqr2JzednajVmBpC+oiTiXZJEApU=
+github.com/holiman/uint256 v1.2.4/go.mod h1:EOMSn4q6Nyt9P6efbI3bueV4e1b3dGlUCXeiRV4ng7E=
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 github.com/huandu/go-assert v1.1.5/go.mod h1:yOLvuqZwmcHIC5rIzrBhT7D3Q9c3GFnd0JrPVhn/06U=
 github.com/huandu/go-clone v1.7.2 h1:3+Aq0Ed8XK+zKkLjE2dfHg0XrpIfcohBE1K+c8Usxoo=
@@ -60,103 +75,109 @@ github.com/huandu/go-clone/generic v1.6.0 h1:Wgmt/fUZ28r16F2Y3APotFD59sHk1p78K0X
 github.com/huandu/go-clone/generic v1.6.0/go.mod h1:xgd9ZebcMsBWWcBx5mVMCoqMX24gLWr5lQicr+nVXNs=
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-github.com/jackc/puddle/v2 v2.2.2 h1:PR8nw+E/1w0GLuRFSmiioY6UooMp6KJv0/61nB7icHo=
-github.com/jackc/puddle/v2 v2.2.2/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
+github.com/jackc/puddle/v2 v2.2.1 h1:RhxXJtFG022u4ibrCSMSiu5aOq1i77R3OHKNJj77OAk=
+github.com/jackc/puddle/v2 v2.2.1/go.mod h1:vriiEXHvEE654aYKXXjOvZM39qJ0q+azkZFrfEOc3H4=
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-github.com/klauspost/compress v1.17.9/go.mod h1:Di0epgTjJY877eYKx5yC51cX2A2Vl2ibi7bDH9ttBbw=
-github.com/klauspost/cpuid/v2 v2.2.9 h1:66ze0taIn2H33fBvCkXuv9BmCwDfafmiIVpKV9kKGuY=
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+github.com/wealdtech/go-eth2-wallet v1.16.0 h1:syD1xDYB7emk4x+6bTYm5VZp9nx5FLab5Fgm09Eq1Kg=
+github.com/wealdtech/go-eth2-wallet v1.16.0/go.mod h1:JFA2P7PpPR8quQ/T6Gsr/4VLj5sQVnyzKgfPA+eqmYE=
+github.com/wealdtech/go-eth2-wallet-dirk v1.4.7 h1:P9xgaoBB9h1r0OUEE6LHffZ+IbiGE4uniMaNjvP1+D8=
+github.com/wealdtech/go-eth2-wallet-dirk v1.4.7/go.mod h1:fP/g7OQQTYCFRg+ZIv6eoTvDdjkZlHnLcf41UgCvrM8=
 github.com/wealdtech/go-eth2-wallet-distributed v1.2.1 h1:+pbG9i9b5TrWd7GDRX8yq4FKA+D7k7aI6uySEvAZ+Kk=
 github.com/wealdtech/go-eth2-wallet-distributed v1.2.1/go.mod h1:jYkDax2VhUNKIct6TVlgxAagvR56/eg7y7J+JFq+gDo=
 github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4 v1.4.1 h1:9j7bpwjT9wmwBb54ZkBhTm1uNIlFFcCJXefd/YskZPw=
@@ -179,8 +200,6 @@ github.com/wealdtech/go-eth2-wallet-encryptor-unencrypted v1.0.2 h1:IMIyl70hbJlx
 github.com/wealdtech/go-eth2-wallet-encryptor-unencrypted v1.0.2/go.mod h1:T8nyAscWIWNcNa6EG/19PwH/OCt2Ly7Orn5okmiuSP4=
 github.com/wealdtech/go-eth2-wallet-hd/v2 v2.7.0 h1:5g4emFacTf+sX6zx6SbZIZGR7Jx5Xr/Xdb7sXnEXlWk=
 github.com/wealdtech/go-eth2-wallet-hd/v2 v2.7.0/go.mod h1:aWgnEi07w1L9wMBRB69sYvoEONppAUly6FDQRWQGqH8=
-github.com/wealdtech/go-eth2-wallet-keystore v1.0.0 h1:DYR6TAyi7RxXoAanLSPdiufGxCX617BQwWOdCxHqHX4=
-github.com/wealdtech/go-eth2-wallet-keystore v1.0.0/go.mod h1:6DGINunnasS9y9F7KH3ya2h74fHWgSCfP3dAJWe4A6U=
 github.com/wealdtech/go-eth2-wallet-nd/v2 v2.5.0 h1:vphAFklkYMRJVo9f5rVWly7PECHrLS4yarjemBa7fRM=
 github.com/wealdtech/go-eth2-wallet-nd/v2 v2.5.0/go.mod h1:kBZUZogqwvvxulEvXi5l6OjZyd7EBmCKxce5Q+lW7fs=
 github.com/wealdtech/go-eth2-wallet-store-filesystem v1.18.1 h1:Ceq74WL57jdBQnrZJFJyGRBKOOFI5wwq9VoxeAbjoEk=
@@ -189,59 +208,62 @@ github.com/wealdtech/go-eth2-wallet-store-s3 v1.12.0 h1:noknYCbHw2soPhwke1LvC99K
 github.com/wealdtech/go-eth2-wallet-store-s3 v1.12.0/go.mod h1:1lSVxfQynUAd5u46rCeAI8wCl8S44lZsNYYXlxVAvwU=
 github.com/wealdtech/go-eth2-wallet-store-scratch v1.7.2 h1:TwOt7bEHsVe6dKJb7XuUG7m06gaBGPCQlBk24Ql8Mws=
 github.com/wealdtech/go-eth2-wallet-store-scratch v1.7.2/go.mod h1:rtIoB34tqL3kUOK+LsLTAHfynxLR8pGScy0lmQmpbKc=
-github.com/wealdtech/go-eth2-wallet-types/v2 v2.12.0 h1:w0OrVImtQfjN7XCqALfgVtcmH8FChaUZjwNGKGzqp0E=
-github.com/wealdtech/go-eth2-wallet-types/v2 v2.12.0/go.mod h1:m8xsnPZLq1vt7bnMveTc4xxVJUv8mBL21iPU4kALYGE=
+github.com/wealdtech/go-eth2-wallet-types/v2 v2.11.0 h1:yX9+FfUXvPDvZ8Q5bhF+64AWrQwh4a3/HpfTx99DnZc=
+github.com/wealdtech/go-eth2-wallet-types/v2 v2.11.0/go.mod h1:UVP9YFcnPiIzHqbmCMW3qrQ3TK5FOqr1fmKqNT9JGr8=
 github.com/wealdtech/go-indexer v1.1.0 h1:vn4gY7nSYSLe0sXVauJgyHvK4NXiDrLKBYYYKWypahk=
 github.com/wealdtech/go-indexer v1.1.0/go.mod h1:lEFTda1rul1EwWIX3QqXq/KW0tnEEhC41Lup06V7Tlo=
 github.com/wealdtech/go-string2eth v1.2.1 h1:u9sofvGFkp+uvTg4Nvsvy5xBaiw8AibGLLngfC4F76g=
 github.com/wealdtech/go-string2eth v1.2.1/go.mod h1:9uwxm18zKZfrReXrGIbdiRYJtbE91iGcj6TezKKEx80=
-go.opentelemetry.io/auto/sdk v1.1.0 h1:cH53jehLUN6UFLY71z+NDOiNJqDdPRaXzTel0sJySYA=
-go.opentelemetry.io/auto/sdk v1.1.0/go.mod h1:3wSPjt5PWp2RhlCcmmOial7AvC4DQqZb7a7wCow3W8A=
-go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.58.0 h1:PS8wXpbyaDJQ2VDHHncMe9Vct0Zn1fEjpsjrLxGJoSc=
-go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.58.0/go.mod h1:HDBUsEjOuRC0EzKZ1bSaRGZWUBAzo+MhAcUUORSr4D0=
-go.opentelemetry.io/otel v1.33.0 h1:/FerN9bax5LoK51X/sI0SVYrjSE0/yUL7DpxW4K3FWw=
-go.opentelemetry.io/otel v1.33.0/go.mod h1:SUUkR6csvUQl+yjReHu5uM3EtVV7MBm5FHKRlNx4I8I=
-go.opentelemetry.io/otel/metric v1.33.0 h1:r+JOocAyeRVXD8lZpjdQjzMadVZp2M4WmQ+5WtEnklQ=
-go.opentelemetry.io/otel/metric v1.33.0/go.mod h1:L9+Fyctbp6HFTddIxClbQkjtubW6O9QS3Ann/M82u6M=
-go.opentelemetry.io/otel/sdk v1.31.0 h1:xLY3abVHYZ5HSfOg3l2E5LUj2Cwva5Y7yGxnSW9H5Gk=
-go.opentelemetry.io/otel/sdk v1.31.0/go.mod h1:TfRbMdhvxIIr/B2N2LQW2S5v9m3gOQ/08KsbbO5BPT0=
-go.opentelemetry.io/otel/sdk/metric v1.31.0 h1:i9hxxLJF/9kkvfHppyLL55aW7iIJz4JjxTeYusH7zMc=
-go.opentelemetry.io/otel/sdk/metric v1.31.0/go.mod h1:CRInTMVvNhUKgSAMbKyTMxqOBC0zgyxzW55lZzX43Y8=
-go.opentelemetry.io/otel/trace v1.33.0 h1:cCJuF7LRjUFso9LPnEAHJDB2pqzp+hbO8eu1qqW2d/s=
-go.opentelemetry.io/otel/trace v1.33.0/go.mod h1:uIcdVUZMpTAmz0tI1z04GoVSezK37CbGV4fr1f2nBck=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.49.0 h1:4Pp6oUg3+e/6M4C0A/3kJ2VYa++dsWVTtGgLVj5xtHg=
+go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.49.0/go.mod h1:Mjt1i1INqiaoZOMGR1RIUJN+i3ChKoFRqzrRQhlkbs0=
+go.opentelemetry.io/otel v1.24.0 h1:0LAOdjNmQeSTzGBzduGe/rU4tZhMwL5rWgtp9Ku5Jfo=
+go.opentelemetry.io/otel v1.24.0/go.mod h1:W7b9Ozg4nkF5tWI5zsXkaKKDjdVjpD4oAt9Qi/MArHo=
+go.opentelemetry.io/otel/metric v1.24.0 h1:6EhoGWWK28x1fbpA4tYTOWBkPefTDQnb8WSGXlc88kI=
+go.opentelemetry.io/otel/metric v1.24.0/go.mod h1:VYhLe1rFfxuTXLgj4CBiyz+9WYBA8pNGJgDcSFRKBco=
+go.opentelemetry.io/otel/trace v1.24.0 h1:CsKnnL4dUAr/0llH9FKuc698G04IrpWV0MQA/Y1YELI=
+go.opentelemetry.io/otel/trace v1.24.0/go.mod h1:HPc3Xr/cOApsBI154IU0OI0HJexz+aw5uPdbs3UCjNU=
 go.uber.org/multierr v1.11.0 h1:blXXJkSxSSfBVBlC76pxqeO+LN3aDfLQo+309xJstO0=
 go.uber.org/multierr v1.11.0/go.mod h1:20+QtiLqy0Nd6FdQB9TLXag12DsQkrbs3htMFfDN80Y=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
 golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.31.0 h1:ihbySMvVjLAeSH1IbfcRTkD/iNscyz8rGzjF/E5hV6U=
-golang.org/x/crypto v0.31.0/go.mod h1:kDsLvtWBEx7MV9tJOj9bnXsPbxwJQ6csT/x4KIN4Ssk=
-golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67 h1:1UoZQm6f0P/ZO0w1Ri+f+ifG/gXhegadRdwBIXEFWDo=
-golang.org/x/exp v0.0.0-20241217172543-b2144cdd0a67/go.mod h1:qj5a5QZpwLU2NLQudwIN5koi3beDhSAlJwa67PuM98c=
+golang.org/x/crypto v0.23.0 h1:dIJU/v2J8Mdglj/8rJ6UUOM3Zc9zLZxVZwwxMooUSAI=
+golang.org/x/crypto v0.23.0/go.mod h1:CKFgDieR+mRhux2Lsu27y0fO304Db0wZe70UKqHu0v8=
+golang.org/x/exp v0.0.0-20240314144324-c7f7c6466f7f h1:3CW0unweImhOzd5FmYuRsD4Y4oQFKZIjAnKbjV4WIrw=
+golang.org/x/exp v0.0.0-20240314144324-c7f7c6466f7f/go.mod h1:CxmFvTBINI24O/j8iY7H1xHzx2i4OsyguNBmN/uPtqc=
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20191116160921-f9c825593386/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
-golang.org/x/net v0.33.0 h1:74SYHlV8BIgHIFC/LrYkOGIwL19eTYXQ5wc6TBuO36I=
-golang.org/x/net v0.33.0/go.mod h1:HXLR5J+9DxmrqMwG9qjGCxZ+zKXxBru04zlTvWlWuN4=
-golang.org/x/sync v0.10.0 h1:3NQrjDixjgGwUOCaF8w2+VYHv0Ve/vGYSbdkTa98gmQ=
-golang.org/x/sync v0.10.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
+golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
+golang.org/x/sync v0.6.0 h1:5BMeUDZ7vkXGfEr1x9B4bRcTH4lpkTkpdh0T/J+qjbQ=
+golang.org/x/sync v0.6.0/go.mod h1:Czt+wKu1gCyEFDUtn0jG5QVvpJ6rzVqr5aXyt9drQfk=
+golang.org/x/sys v0.0.0-20190130150945-aca44879d564/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
 golang.org/x/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200116001909-b77594299b42/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.0.0-20221010170243-090e33056c14/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
+golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.12.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
-golang.org/x/sys v0.21.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.28.0 h1:Fksou7UEQUWlKvIdsqzJmUmCX3cZuD2+P3XyyzwMhlA=
-golang.org/x/sys v0.28.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
-golang.org/x/text v0.21.0 h1:zyQAAkrwaneQ066sspRyJaG9VNi/YJ1NfzcGB3hZ/qo=
-golang.org/x/text v0.21.0/go.mod h1:4IBbMaMmOPCJ8SecivzSH54+73PCFmPWxNTLm+vZkEQ=
-google.golang.org/genproto/googleapis/api v0.0.0-20241219192143-6b3ec007d9bb h1:B7GIB7sr443wZ/EAEl7VZjmh1V6qzkt5V+RYcUYtS1U=
-google.golang.org/genproto/googleapis/api v0.0.0-20241219192143-6b3ec007d9bb/go.mod h1:E5//3O5ZIG2l71Xnt+P/CYUY8Bxs8E7WMoZ9tlcMbAY=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20241219192143-6b3ec007d9bb h1:3oy2tynMOP1QbTC0MsNNAV+Se8M2Bd0A5+x1QHyw+pI=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20241219192143-6b3ec007d9bb/go.mod h1:lcTa1sDdWEIHMWlITnIczmw5w60CF9ffkb8Z+DVmmjA=
-google.golang.org/grpc v1.69.2 h1:U3S9QEtbXC0bYNvRtcoklF3xGtLViumSYxWykJS+7AU=
-google.golang.org/grpc v1.69.2/go.mod h1:vyjdE6jLBI76dgpDojsFGNaHlxdjXN9ghpnd2o7JGZ4=
-google.golang.org/protobuf v1.36.0 h1:mjIs9gYtt56AzC4ZaffQuh88TZurBGhIJMBZGSxNerQ=
-google.golang.org/protobuf v1.36.0/go.mod h1:9fA7Ob0pmnwhb644+1+CVWFRbNajQ6iRojtC/QF5bRE=
+golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
+golang.org/x/text v0.15.0 h1:h1V/4gjBv8v9cjcR6+AR5+/cIYK5N/WAgiv4xlsEtAk=
+golang.org/x/text v0.15.0/go.mod h1:18ZOQIKpY8NJVqYksKHtTdi31H5itFRjB5/qKTNYzSU=
+golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
+golang.org/x/xerrors v0.0.0-20200804184101-5ec99f83aff1/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
+golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 h1:+cNy6SZtPcJQH3LJVLOSmiC7MMxXNOb3PU/VUEz+EhU=
+golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028/go.mod h1:NDW/Ps6MPRej6fsCIbMTohpP40sJ/P/vI1MoTEGwX90=
+google.golang.org/genproto/googleapis/api v0.0.0-20240314234333-6e1732d8331c h1:kaI7oewGK5YnVwj+Y+EJBO/YN1ht8iTL9XkFHtVZLsc=
+google.golang.org/genproto/googleapis/api v0.0.0-20240314234333-6e1732d8331c/go.mod h1:VQW3tUculP/D4B+xVCo+VgSq8As6wA9ZjHl//pmk+6s=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240314234333-6e1732d8331c h1:lfpJ/2rWPa/kJgxyyXM8PrNnfCzcmxJ265mADgwmvLI=
+google.golang.org/genproto/googleapis/rpc v0.0.0-20240314234333-6e1732d8331c/go.mod h1:WtryC6hu0hhx87FDGxWCDptyssuo68sk10vYjF+T9fY=
+google.golang.org/grpc v1.62.1 h1:B4n+nfKzOICUXMgyrNd19h/I9oH0L1pizfk1d4zSgTk=
+google.golang.org/grpc v1.62.1/go.mod h1:IWTG0VlJLCh1SkC58F7np9ka9mx/WNkjl4PGJaiq+QE=
+google.golang.org/protobuf v1.33.0 h1:uNO2rsAINq/JlFpSdYEKIZ0uKD/R9cpdv0T+yoGwGmI=
+google.golang.org/protobuf v1.33.0/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
 gopkg.in/Knetic/govaluate.v3 v3.0.0 h1:18mUyIt4ZlRlFZAAfVetz4/rzlJs9yhN+U02F4u1AOc=
 gopkg.in/Knetic/govaluate.v3 v3.0.0/go.mod h1:csKLBORsPbafmSCGTEh3U7Ozmsuq8ZSIlKk1bcqph0E=
 gopkg.in/cenkalti/backoff.v1 v1.1.0 h1:Arh75ttbsvlpVA7WtVpH4u9h6Zl46xuptxqLxPiSo4Y=
--- a/shamir/shamir.go
+++ b/shamir/shamir.go
@@ -75,9 +75,9 @@ func (p *polynomial) evaluate(x uint8) uint8 {
 func interpolatePolynomial(xSamples, ySamples []uint8, x uint8) uint8 {
 	limit := len(xSamples)
 	var result, basis uint8
-	for i := range limit {
+	for i := 0; i < limit; i++ {
 		basis = 1
-		for j := range limit {
+		for j := 0; j < limit; j++ {
 			if i == j {
 				continue
 			}
@@ -183,7 +183,7 @@ func Split(secret []byte, parts, threshold int) ([][]byte, error) {
 		// Generate a `parts` number of (x,y) pairs
 		// We cheat by encoding the x value once as the final index,
 		// so that it only needs to be stored once.
-		for i := range parts {
+		for i := 0; i < parts; i++ {
 			x := uint8(xCoordinates[i]) + 1
 			y := p.evaluate(x)
 			out[i][idx] = y
--- a/util/attestations.go
+++ b/util/attestations.go
@@ -21,44 +21,15 @@ import (
 	"github.com/wealdtech/ethdo/services/chaintime"
 )

-// AttestationHead returns the head for which the attestation should have voted.
-func AttestationHead(ctx context.Context,
-	headersCache *BeaconBlockHeaderCache,
-	attestation *phase0.Attestation,
-) (
-	phase0.Root,
-	error,
-) {
-	slot := attestation.Data.Slot
-	for {
-		header, err := headersCache.Fetch(ctx, slot)
-		if err != nil {
-			return phase0.Root{}, err
-		}
-		if header == nil {
-			// No block.
-			slot--
-			continue
-		}
-		if !header.Canonical {
-			// Not canonical.
-			slot--
-			continue
-		}
-
-		return header.Root, nil
-	}
-}
-
 // AttestationHeadCorrect returns true if the given attestation had the correct head.
 func AttestationHeadCorrect(ctx context.Context,
 	headersCache *BeaconBlockHeaderCache,
-	attestation *phase0.Attestation,
+	attestationData *phase0.AttestationData,
 ) (
 	bool,
 	error,
 ) {
-	slot := attestation.Data.Slot
+	slot := attestationData.Slot
 	for {
 		header, err := headersCache.Fetch(ctx, slot)
 		if err != nil {
@@ -74,38 +45,7 @@ func AttestationHeadCorrect(ctx context.Context,
 			slot--
 			continue
 		}
-		return bytes.Equal(header.Root[:], attestation.Data.BeaconBlockRoot[:]), nil
-	}
-}
-
-// AttestationTarget returns the target for which the attestation should have voted.
-func AttestationTarget(ctx context.Context,
-	headersCache *BeaconBlockHeaderCache,
-	chainTime chaintime.Service,
-	attestation *phase0.Attestation,
-) (
-	phase0.Root,
-	error,
-) {
-	// Start with first slot of the target epoch.
-	slot := chainTime.FirstSlotOfEpoch(attestation.Data.Target.Epoch)
-	for {
-		header, err := headersCache.Fetch(ctx, slot)
-		if err != nil {
-			return phase0.Root{}, err
-		}
-		if header == nil {
-			// No block.
-			slot--
-			continue
-		}
-		if !header.Canonical {
-			// Not canonical.
-			slot--
-			continue
-		}
-
-		return header.Root, nil
+		return bytes.Equal(header.Root[:], attestationData.BeaconBlockRoot[:]), nil
 	}
 }

@@ -113,13 +53,13 @@ func AttestationTarget(ctx context.Context,
 func AttestationTargetCorrect(ctx context.Context,
 	headersCache *BeaconBlockHeaderCache,
 	chainTime chaintime.Service,
-	attestation *phase0.Attestation,
+	attestationData *phase0.AttestationData,
 ) (
 	bool,
 	error,
 ) {
 	// Start with first slot of the target epoch.
-	slot := chainTime.FirstSlotOfEpoch(attestation.Data.Target.Epoch)
+	slot := chainTime.FirstSlotOfEpoch(attestationData.Target.Epoch)
 	for {
 		header, err := headersCache.Fetch(ctx, slot)
 		if err != nil {
@@ -135,6 +75,6 @@ func AttestationTargetCorrect(ctx context.Context,
 			slot--
 			continue
 		}
-		return bytes.Equal(header.Root[:], attestation.Data.Target.Root[:]), nil
+		return bytes.Equal(header.Root[:], attestationData.Target.Root[:]), nil
 	}
 }
--- a/util/beaconnode.go
+++ b/util/beaconnode.go
@@ -38,10 +38,11 @@ var defaultBeaconNodeAddresses = []string{
 var fallbackBeaconNode = "http://mainnet-consensus.attestant.io/"

 type ConnectOpts struct {
-	Address       string
-	Timeout       time.Duration
-	AllowInsecure bool
-	LogFallback   bool
+	Address           string
+	Timeout           time.Duration
+	AllowInsecure     bool
+	LogFallback       bool
+	CustomSpecSupport bool
 }

 // ConnectToBeaconNode connects to a beacon node at the given address.
@@ -56,12 +57,12 @@ func ConnectToBeaconNode(ctx context.Context, opts *ConnectOpts) (eth2client.Ser

 	if opts.Address != "" {
 		// We have an explicit address; use it.
-		return connectToBeaconNode(ctx, opts.Address, opts.Timeout, opts.AllowInsecure)
+		return connectToBeaconNode(ctx, opts.Address, opts.Timeout, opts.AllowInsecure, opts.CustomSpecSupport)
 	}

 	// Try the defaults.
 	for _, address := range defaultBeaconNodeAddresses {
-		client, err := connectToBeaconNode(ctx, address, opts.Timeout, opts.AllowInsecure)
+		client, err := connectToBeaconNode(ctx, address, opts.Timeout, opts.AllowInsecure, opts.CustomSpecSupport)
 		if err == nil {
 			return client, nil
 		}
@@ -71,7 +72,7 @@ func ConnectToBeaconNode(ctx context.Context, opts *ConnectOpts) (eth2client.Ser
 	if opts.LogFallback {
 		fmt.Fprintf(os.Stderr, "No connection supplied with --connection parameter and no local beacon node found, attempting to use mainnet fallback\n")
 	}
-	client, err := connectToBeaconNode(ctx, fallbackBeaconNode, opts.Timeout, true)
+	client, err := connectToBeaconNode(ctx, fallbackBeaconNode, opts.Timeout, true, opts.CustomSpecSupport)
 	if err == nil {
 		return client, nil
 	}
@@ -79,7 +80,7 @@ func ConnectToBeaconNode(ctx context.Context, opts *ConnectOpts) (eth2client.Ser
 	return nil, errors.New("failed to connect to any beacon node")
 }

-func connectToBeaconNode(ctx context.Context, address string, timeout time.Duration, allowInsecure bool) (eth2client.Service, error) {
+func connectToBeaconNode(ctx context.Context, address string, timeout time.Duration, allowInsecure bool, withCustomSpecSupport bool) (eth2client.Service, error) {
 	if !strings.HasPrefix(address, "http") {
 		address = fmt.Sprintf("http://%s", address)
 	}
@@ -101,6 +102,7 @@ func connectToBeaconNode(ctx context.Context, address string, timeout time.Durat
 		http.WithLogLevel(zerolog.Disabled),
 		http.WithAddress(address),
 		http.WithTimeout(timeout),
+		http.WithCustomSpecSupport(withCustomSpecSupport),
 	)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to connect to beacon node")
Author	SHA1	Message	Date
Jim McDonald	bb34776d05	Return on error.	2024-05-27 09:34:06 +01:00
Jim McDonald	e29818340d	Additional electra support.	2024-05-15 00:06:52 +01:00
Jim McDonald	083f484907	Support for custom spec.	2024-05-14 23:14:46 +01:00