Update dependencies.

Avoid crash when signing and verifing signatures using keys rather than accounts.
Update workflow.
2026-01-10 14:37:57 -05:00 · 2024-12-20 22:41:00 +00:00 · 2024-10-22 22:55:08 +01:00 · 2024-10-21 20:25:41 +01:00 · 2024-10-21 19:50:23 +01:00 · 2024-10-21 19:47:03 +01:00
30 changed files with 586 additions and 312 deletions
--- a/.github/workflows/golangci-lint.yml
+++ b/.github/workflows/golangci-lint.yml
@@ -1,23 +1,24 @@
-name: golangci-lint
+name: 'golangci-lint'
 on:
-  push:
-    tags:
-      - v*
-    branches:
-    - master
  pull_request:
+  push:
+    branches:
+      - 'master'
+  workflow_dispatch:
+
 permissions:
-  contents: read
+  contents: 'read'
+
 jobs:
  golangci:
-    name: lint
-    runs-on: ubuntu-latest
+    name: 'lint'
+    runs-on: 'ubuntu-24.04'
    steps:
-      - uses: actions/setup-go@v4
+      - uses: 'actions/setup-go@v5'
        with:
-          go-version: '^1.21'
-      - uses: actions/checkout@v4
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v4
+          cache: false
+          go-version: '^1.22'
+      - uses: 'actions/checkout@v4'
+      - uses: 'golangci/golangci-lint-action@v6'
        with:
          only-new-issues: true
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -3,8 +3,8 @@ name: Release
 on:
  push:
    tags:
-    - 'v*'
-    - 't*'
+      - 'v*'
+      - 't*'

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

      - name: Check out repository into the Go module directory
        uses: actions/checkout@v4
@@ -119,9 +120,10 @@ jobs:
    needs: [create_release, env_vars]
    steps:
      - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
        with:
-          go-version: '^1.21'
+          cache: false
+          go-version: '^1.22'

      - name: Check out repository into the Go module directory
        uses: actions/checkout@v4
@@ -164,9 +166,10 @@ jobs:
    needs: [create_release, env_vars]
    steps:
      - name: Set up Go
-        uses: actions/setup-go@v4
+        uses: actions/setup-go@v5
        with:
-          go-version: '^1.21'
+          cache: false
+          go-version: '^1.22'

      - name: Check out repository into the Go module directory
        uses: actions/checkout@v4
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,15 +1,18 @@
 name: test
 on:
+  pull_request:
  push:
    branches:
-    - master
-  pull_request:
+      - master
+  workflow_dispatch:
+
 jobs:
  test:
    runs-on: ubuntu-latest
    steps:
-      - uses: actions/setup-go@v4
+      - uses: actions/setup-go@v5
        with:
-          go-version: '^1.21'
+          cache: false
+          go-version: '^1.22'
      - uses: actions/checkout@v4
-      - uses: n8maninger/action-golang-test@v1
+      - uses: n8maninger/action-golang-test@v2
--- a/.golangci.yml
+++ b/.golangci.yml
@@ -69,7 +69,7 @@ run:
  # Define the Go version limit.
  # Mainly related to generics support since go1.18.
  # Default: use Go version from the go.mod file, fallback on the env var `GOVERSION`, fallback on 1.18
-  go: '1.19'
+  # go: '1.19'


 # output configuration options
@@ -106,6 +106,11 @@ 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

@@ -132,9 +137,9 @@ linters:
    - dupl
    - err113
    - errorlint
-    - execinquery
    - exhaustive
    - exhaustruct
+    - exportloopref
    - forbidigo
    - forcetypeassert
    - funlen
@@ -144,7 +149,6 @@ linters:
    - gocognit
    - goconst
    - goheader
-    - gomnd
    - ireturn
    - lll
    - maintidx
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,19 @@
+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 

--- a/2
+++ b/2
@@ -1,4 +1,4 @@
-FROM golang:1.21-bookworm as builder
+FROM golang:1.22-bookworm as builder

 WORKDIR /app

--- a/cmd/account/derive/input.go
+++ b/cmd/account/derive/input.go
@@ -22,6 +22,7 @@ import (

 type dataIn struct {
 	quiet bool
+	json  bool
 	// Derivation information.
 	mnemonic string
 	path     string
@@ -37,6 +38,9 @@ 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
@@ -31,6 +31,7 @@ import (
 )

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

-	keystoreFilename := fmt.Sprintf("keystore-%s-%d.json", strings.ReplaceAll(data.path, "/", "_"), time.Now().Unix())
+	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())

-	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
@@ -38,6 +38,7 @@ 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
@@ -50,6 +50,7 @@ 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) {
@@ -62,4 +63,7 @@ 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/block/analyze/process.go
+++ b/cmd/block/analyze/process.go
@@ -128,7 +128,7 @@ func (c *command) analyzeAttestations(ctx context.Context, block *spec.Versioned

 			// Count new votes.
 			analysis.PossibleVotes = int(attestation.AggregationBits.Len())
-			for j := uint64(0); j < attestation.AggregationBits.Len(); j++ {
+			for j := range attestation.AggregationBits.Len() {
 				if attestation.AggregationBits.BitAt(j) {
 					analysis.Votes++
 					if blockVotes[data.Slot][data.Index].BitAt(j) {
@@ -269,7 +269,7 @@ func (c *command) processParentBlock(_ context.Context, block *spec.VersionedSig
 		if !exists {
 			c.votes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
 		}
-		for j := uint64(0); j < attestation.AggregationBits.Len(); j++ {
+		for j := range attestation.AggregationBits.Len() {
 			if attestation.AggregationBits.BitAt(j) {
 				c.votes[data.Slot][data.Index].SetBitAt(j, true)
 			}
--- a/cmd/block/info/output.go
+++ b/cmd/block/info/output.go
@@ -289,7 +289,7 @@ 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 := uint64(0); i < syncAggregate.SyncCommitteeBits.Len(); i++ {
+						for i := range syncAggregate.SyncCommitteeBits.Len() {
 							if syncAggregate.SyncCommitteeBits.BitAt(i) {
 								res.WriteString(fmt.Sprintf(" %d", syncCommitteeResponse.Data.Validators[i]))
 							}
@@ -791,7 +791,7 @@ 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 := 0; i < 32; i++ {
+		for i := range 32 {
 			baseFeePerGasBEBytes[i] = payload.BaseFeePerGas[32-1-i]
 		}
 		baseFeePerGas := new(big.Int).SetBytes(baseFeePerGasBEBytes)
@@ -953,7 +953,7 @@ 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 := 0; i < 32; i++ {
+		for i := range 32 {
 			baseFeePerGasBEBytes[i] = payload.BaseFeePerGas[32-1-i]
 		}
 		baseFeePerGas := new(big.Int).SetBytes(baseFeePerGasBEBytes)
@@ -1016,7 +1016,7 @@ func bitlistToString(input bitfield.Bitlist) string {
 	bits := int(input.Len())

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

 	res := strings.Builder{}
-	for i := 0; i < bits; i++ {
+	for i := range bits {
 		if input.BitAt(uint64(i)) {
 			res.WriteString("✓")
 		} else {
@@ -1049,7 +1049,7 @@ func bitvectorToString(input bitfield.Bitvector512) string {
 func attestingIndices(input bitfield.Bitlist, indices []phase0.ValidatorIndex) string {
 	bits := int(input.Len())
 	res := ""
-	for i := 0; i < bits; i++ {
+	for i := range bits {
 		if input.BitAt(uint64(i)) {
 			res = fmt.Sprintf("%s%d ", res, indices[i])
 		}
@@ -1095,8 +1095,9 @@ func blockGraffiti(_ context.Context, graffiti []byte) string {
 		"GE": "go-ethereum",
 		"NM": "nethermind",
 		"RH": "reth",
+		"TR": "trin-execution",
 	}
-	executionRegex := regexp.MustCompile(`(BU|EG|EJ|GE|NM|RH)([0-9a-f]*)`)
+	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 {
--- a/cmd/block/info/process.go
+++ b/cmd/block/info/process.go
@@ -114,13 +114,20 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 			return nil, errors.Wrap(err, "failed to output block")
 		}
 	case spec.DataVersionDeneb:
-		blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
-			Block: data.blockID,
-		})
+		var blobSidecars []*deneb.BlobSidecar
+		kzgCommitments, err := block.BlobKZGCommitments()
 		if err != nil {
-			return nil, errors.Wrap(err, "failed to obtain blob sidecars")
+			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
 		}
-		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")
 		}
@@ -180,13 +187,25 @@ func headEventHandler(event *apiv1.Event) {
 	case spec.DataVersionCapella:
 		err = outputCapellaBlock(ctx, jsonOutput, sszOutput, block.Capella)
 	case spec.DataVersionDeneb:
-		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)
+		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
 		}
+		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
+		}
+		err = outputDenebBlock(context.Background(), jsonOutput, sszOutput, block.Deneb, blobSidecars)
 	default:
 		err = errors.New("unknown block version")
 	}
--- a/cmd/chain/verify/signedcontributionandproof/process.go
+++ b/cmd/chain/verify/signedcontributionandproof/process.go
@@ -221,7 +221,7 @@ 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 := uint64(0); i < c.item.Message.Contribution.AggregationBits.Len(); i++ {
+	for i := range c.item.Message.Contribution.AggregationBits.Len() {
 		if c.item.Message.Contribution.AggregationBits.BitAt(i) {
 			includedIndices = append(includedIndices, subCommittee[int(i)])
 		}
--- a/cmd/epoch.go
+++ b/cmd/epoch.go
@@ -29,12 +29,12 @@ func init() {
 	RootCmd.AddCommand(epochCmd)
 }

-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 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 epochBindings(cmd *cobra.Command) {
-	if err := viper.BindPFlag("epoch", cmd.Flags().Lookup("epoch")); err != nil {
+	if err := viper.BindPFlag("validators", cmd.Flags().Lookup("validators")); err != nil {
 		panic(err)
 	}
 }
--- a/cmd/epoch/summary/command.go
+++ b/cmd/epoch/summary/command.go
@@ -36,9 +36,11 @@ type command struct {
 	allowInsecureConnections bool

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

 	// Data access.
 	eth2Client                 eth2client.Service
@@ -58,45 +60,61 @@ type command struct {
 }

 type epochSummary struct {
-	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"`
+	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"`
 }

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

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

-type nonParticipatingValidator struct {
-	Validator phase0.ValidatorIndex `json:"validator_index"`
-	Slot      phase0.Slot           `json:"slot"`
-	Committee phase0.CommitteeIndex `json:"committee_index"`
+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"`
 }

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

--- 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.Proposer))
+			missedProposals = append(missedProposals, fmt.Sprintf("\n    Slot %d (validator %d)", proposal.Slot, proposal.ValidatorIndex))
 		} 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.Proposer))
+			builder.WriteString(fmt.Sprintf("%d", proposal.ValidatorIndex))
 			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.Index))
+				builder.WriteString(fmt.Sprintf("%d", syncCommittee.ValidatorIndex))
 				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
@@ -43,6 +43,14 @@ 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
 	}
@@ -52,6 +60,7 @@ func (c *command) process(ctx context.Context) error {
 	if err := c.processSyncCommitteeDuties(ctx); err != nil {
 		return err
 	}
+
 	return c.processBlobs(ctx)
 }

@@ -69,10 +78,20 @@ 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,
-			Proposer: duty.ValidatorIndex,
-			Block:    present,
+			Slot:           duty.Slot,
+			ValidatorIndex: duty.ValidatorIndex,
+			Block:          present,
 		})
 	}

@@ -80,14 +99,25 @@ 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: fmt.Sprintf("%d", c.chainTime.FirstSlotOfEpoch(c.summary.Epoch)),
+		State:   "head",
+		Indices: validatorIndices,
 	})
 	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
 		}
@@ -112,20 +142,45 @@ func (c *command) processAttesterDuties(ctx context.Context) error {
 		lastSlot = c.chainTime.CurrentSlot()
 	}

-	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)
+	participatingValidators, headCorrectValidators, headTimelyValidators, sourceTimelyValidators, targetCorrectValidators, targetTimelyValidators, participations, err := c.processSlots(ctx, firstSlot, lastSlot)
 	if err != nil {
 		return err
 	}

-	c.summary.NonParticipatingValidators = make([]*nonParticipatingValidator, 0, len(activeValidators)-len(votes))
+	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))
 	for activeValidatorIndex := range activeValidators {
-		if _, exists := votes[activeValidatorIndex]; !exists {
+		if _, exists := participatingValidators[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 {
@@ -140,18 +195,18 @@ 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]*nonParticipatingValidator,
+	map[phase0.ValidatorIndex]struct{},
+	map[phase0.ValidatorIndex]struct{},
+	map[phase0.ValidatorIndex]struct{},
+	map[phase0.ValidatorIndex]struct{},
+	map[phase0.ValidatorIndex]struct{},
+	map[phase0.ValidatorIndex]*attestingValidator,
 	error,
 ) {
 	votes := make(map[phase0.ValidatorIndex]struct{})
@@ -161,7 +216,7 @@ 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]*nonParticipatingValidator)
+	participations := make(map[phase0.ValidatorIndex]*attestingValidator)

 	// Need a cache of beacon block headers to reduce lookup times.
 	headersCache := util.NewBeaconBlockHeaderCache(c.beaconBlockHeadersProvider)
@@ -169,7 +224,7 @@ 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 0, 0, 0, 0, 0, 0, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", slot))
+			return nil, nil, nil, nil, nil, 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.
@@ -177,11 +232,11 @@ func (c *command) processSlots(ctx context.Context,
 		}
 		slot, err := block.Slot()
 		if err != nil {
-			return 0, 0, 0, 0, 0, 0, nil, nil, err
+			return nil, nil, nil, nil, nil, nil, nil, err
 		}
 		attestations, err := block.Attestations()
 		if err != nil {
-			return 0, 0, 0, 0, 0, 0, nil, nil, err
+			return nil, nil, nil, nil, nil, 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) {
@@ -194,18 +249,29 @@ func (c *command) processSlots(ctx context.Context,
 					State: fmt.Sprintf("%d", attestation.Data.Slot),
 				})
 				if err != nil {
-					return 0, 0, 0, 0, 0, 0, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain committees for slot %d", attestation.Data.Slot))
+					return nil, nil, nil, nil, nil, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain committees for slot %d", attestation.Data.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 {
-						participations[index] = &nonParticipatingValidator{
-							Validator: index,
-							Slot:      beaconCommittee.Slot,
-							Committee: beaconCommittee.Index,
+						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,
+							}
 						}
 					}
 				}
@@ -214,44 +280,70 @@ func (c *command) processSlots(ctx context.Context,
 			committee := slotCommittees[attestation.Data.Index]

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

-			for i := uint64(0); i < attestation.AggregationBits.Len(); i++ {
+			for i := range attestation.AggregationBits.Len() {
 				if attestation.AggregationBits.BitAt(i) {
-					votes[committee[int(i)]] = struct{}{}
-					if _, exists := headCorrects[committee[int(i)]]; !exists && headCorrect {
-						headCorrects[committee[int(i)]] = struct{}{}
+					validatorIndex := committee[int(i)]
+					if len(c.validators) > 0 {
+						if _, exists := c.validators[validatorIndex]; !exists {
+							// Not one of our validators.
+							continue
+						}
 					}
-					if _, exists := headTimelys[committee[int(i)]]; !exists && headCorrect && inclusionDistance == 1 {
-						headTimelys[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 := sourceTimelys[committee[int(i)]]; !exists && inclusionDistance <= 5 {
-						sourceTimelys[committee[int(i)]] = struct{}{}
+
+					votes[validatorIndex] = struct{}{}
+					if _, exists := headCorrects[validatorIndex]; !exists && headCorrect {
+						headCorrects[validatorIndex] = struct{}{}
 					}
-					if _, exists := targetCorrects[committee[int(i)]]; !exists && targetCorrect {
-						targetCorrects[committee[int(i)]] = struct{}{}
+					if _, exists := headTimelys[validatorIndex]; !exists && headCorrect && inclusionDistance == 1 {
+						headTimelys[validatorIndex] = struct{}{}
 					}
-					if _, exists := targetTimelys[committee[int(i)]]; !exists && targetCorrect && inclusionDistance <= 32 {
-						targetTimelys[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{}{}
 					}
 				}
 			}
 		}
 	}
-	return len(votes),
-		len(headCorrects),
-		len(headTimelys),
-		len(sourceTimelys),
-		len(targetCorrects),
-		len(targetTimelys),
-		votes,
+
+	return votes,
+		headCorrects,
+		headTimelys,
+		sourceTimelys,
+		targetCorrects,
+		targetTimelys,
 		participations,
 		nil
 }
@@ -273,7 +365,18 @@ 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
 	}
@@ -296,9 +399,15 @@ 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 := uint64(0); i < aggregate.SyncCommitteeBits.Len(); i++ {
+		for i := range aggregate.SyncCommitteeBits.Len() {
+			validatorIndex := committee.Validators[int(i)]
+			if _, exists := c.validators[validatorIndex]; !exists {
+				// Not one of ours.
+				continue
+			}
 			if !aggregate.SyncCommitteeBits.BitAt(i) {
-				missed[committee.Validators[int(i)]]++
+				missed[validatorIndex]++
+				missedSlots[validatorIndex] = append(missedSlots[validatorIndex], slot)
 			}
 		}
 	}
@@ -307,8 +416,9 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 	for index, count := range missed {
 		if count > 0 {
 			c.summary.SyncCommittee = append(c.summary.SyncCommittee, &epochSyncCommittee{
-				Index:  index,
-				Missed: count,
+				ValidatorIndex: index,
+				Missed:         count,
+				MissedSlots:    missedSlots[index],
 			})
 		}
 	}
@@ -320,7 +430,7 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 			return missedDiff > 0
 		}
 		// Then order by validator index.
-		return c.summary.SyncCommittee[i].Index < c.summary.SyncCommittee[j].Index
+		return c.summary.SyncCommittee[i].ValidatorIndex < c.summary.SyncCommittee[j].ValidatorIndex
 	})

 	return nil
@@ -378,10 +488,10 @@ func (c *command) setup(ctx context.Context) error {
 }

 func (c *command) processBlobs(ctx context.Context) error {
-	for slot := c.summary.FirstSlot; slot <= c.summary.LastSlot; slot++ {
-		block, err := c.fetchBlock(ctx, fmt.Sprintf("%d", slot))
+	for _, proposal := range c.summary.Proposals {
+		block, err := c.fetchBlock(ctx, fmt.Sprintf("%d", proposal.Slot))
 		if err != nil {
-			return errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", slot))
+			return errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", proposal.Slot))
 		}
 		if block == nil {
 			continue
--- a/cmd/epochsummary.go
+++ b/cmd/epochsummary.go
@@ -46,9 +46,17 @@ In quiet mode this will return 0 if information for the epoch is found, otherwis

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

 func epochSummaryBindings(cmd *cobra.Command) {
 	epochBindings(cmd)
+	if err := viper.BindPFlag("validators", cmd.Flags().Lookup("validators")); err != nil {
+		panic(err)
+	}
 }
--- a/cmd/signaturesign.go
+++ b/cmd/signaturesign.go
@@ -19,6 +19,7 @@ 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"
@@ -59,6 +60,8 @@ 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
@@ -19,6 +19,7 @@ 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"
@@ -71,6 +72,10 @@ 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/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.depositDataRoot == nil {
+	if datum.depositMessageRoot == nil {
 		return "", errors.New("deposit message root required")
 	}
 	if datum.forkVersion == nil {
--- 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 := 0; i < 1024; i++ {
+	for i := range 1024 {
 		path := fmt.Sprintf("m/12381/3600/%d/0", i)
 		if debug {
 			fmt.Printf("Checking path %s\n", path)
--- 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 1.35.4)"
+var ReleaseVersion = "local build (latest release 1.36.2)"

 // 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, 2020 Weald Technology Trading
+// Copyright © 2019 - 2024 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
@@ -24,6 +24,7 @@ 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"
 )
@@ -40,6 +41,8 @@ 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")
 	}
@@ -132,3 +135,16 @@ 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, 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")
+- `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")
 - `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.

@@ -183,6 +183,7 @@ $ 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
@@ -1,105 +1,106 @@
 module github.com/wealdtech/ethdo

-go 1.21
+go 1.22.7

-toolchain go1.21.6
+toolchain go1.23.2

 require (
-	github.com/attestantio/go-eth2-client v0.21.4
-	github.com/ferranbt/fastssz v0.1.3
+	github.com/attestantio/go-eth2-client v0.22.0
+	github.com/ferranbt/fastssz v0.1.4
 	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 v1.35.0
+	github.com/herumi/bls-eth-go-binary v1.36.1
 	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 v0.0.0-20240328144219-a1caa50c3a1e
+	github.com/prysmaticlabs/go-bitfield v0.0.0-20240618144021-706c95b2dd15
 	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 v1.8.0
+	github.com/spf13/cobra v1.8.1
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.18.2
-	github.com/stretchr/testify v1.9.0
+	github.com/spf13/viper v1.19.0
+	github.com/stretchr/testify v1.10.0
 	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 v1.16.0
-	github.com/wealdtech/go-eth2-wallet-dirk v1.4.9
+	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-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 v2.11.0
+	github.com/wealdtech/go-eth2-wallet-types/v2 v2.12.0
 	github.com/wealdtech/go-string2eth v1.2.1
-	golang.org/x/text v0.15.0
+	golang.org/x/text v0.21.0
 )

 require (
-	github.com/aws/aws-sdk-go v1.53.10 // indirect
+	github.com/aws/aws-sdk-go v1.55.5 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
 	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
-	github.com/dgraph-io/ristretto v0.1.1 // indirect
+	github.com/dgraph-io/ristretto v0.2.0 // indirect
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/fatih/color v1.17.0 // indirect
-	github.com/fsnotify/fsnotify v1.7.0 // 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/go-logr/stdr v1.2.2 // indirect
-	github.com/goccy/go-yaml v1.11.3 // indirect
-	github.com/golang/glog v1.2.1 // indirect
+	github.com/goccy/go-yaml v1.15.12 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
-	github.com/holiman/uint256 v1.2.4 // indirect
+	github.com/holiman/uint256 v1.3.2 // indirect
 	github.com/huandu/go-clone v1.7.2 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/jackc/puddle/v2 v2.2.1 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
-	github.com/magiconair/properties v1.8.7 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.9 // indirect
+	github.com/magiconair/properties v1.8.9 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
-	github.com/minio/highwayhash v1.0.2 // indirect
+	github.com/minio/highwayhash v1.0.3 // indirect
 	github.com/minio/sha256-simd v1.0.1 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.2.2 // indirect
-	github.com/pk910/dynamic-ssz v0.0.4 // 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/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
-	github.com/prometheus/client_golang v1.19.1 // indirect
+	github.com/prometheus/client_golang v1.20.5 // indirect
 	github.com/prometheus/client_model v0.6.1 // indirect
-	github.com/prometheus/common v0.53.0 // indirect
-	github.com/prometheus/procfs v0.15.0 // indirect
+	github.com/prometheus/common v0.61.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
 	github.com/protolambda/zssz v0.1.5 // indirect
 	github.com/r3labs/sse/v2 v2.10.0 // indirect
-	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/locafero v0.6.0 // 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 v1.6.0 // indirect
+	github.com/spf13/cast v1.7.1 // 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/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.52.0 // indirect
-	go.opentelemetry.io/otel v1.27.0 // indirect
-	go.opentelemetry.io/otel/metric v1.27.0 // indirect
-	go.opentelemetry.io/otel/trace v1.27.0 // 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.uber.org/multierr v1.11.0 // indirect
-	golang.org/x/crypto v0.23.0 // indirect
-	golang.org/x/exp v0.0.0-20240525044651-4c93da0ed11d // indirect
-	golang.org/x/net v0.25.0 // indirect
-	golang.org/x/sync v0.7.0 // 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 v0.0.0-20240521202816-d264139d666e // indirect
-	google.golang.org/genproto/googleapis/rpc v0.0.0-20240521202816-d264139d666e // indirect
-	google.golang.org/grpc v1.64.0 // indirect
-	google.golang.org/protobuf v1.34.1 // 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
 	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
@@ -1,52 +1,43 @@
-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 v1.53.10 h1:3enP5l5WtezT9Ql+XZqs56JBf5YUd/FEzTCg///OIGY=
-github.com/aws/aws-sdk-go v1.53.10/go.mod h1:LF8svs817+Nz+DmiMQKTO3ubZ/6IaTpq3TjupRn3Eqk=
+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/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 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
 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/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/cpuguy83/go-md2man/v2 v2.0.4/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 v0.1.1 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/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/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/fatih/color v1.17.0 h1:GlRw1BRJxkpqUCBKzKOw098ed57fEsKeNjpTe3cSjK4=
-github.com/fatih/color v1.17.0/go.mod h1:YZ7TlrGPkiz6ku9fK3TLD/pl3CpsiFyu8N92HLgmosI=
-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/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/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 v1.7.0 h1:8JEhPFa5W2WU7YfeZzPNqzMP6Lwt7L2715Ggo0nosvA=
-github.com/fsnotify/fsnotify v1.7.0/go.mod h1:40Bi/Hjc2AVfZrqy+aj+yEI+/bRxZnMJyTJwOpGvigM=
+github.com/fsnotify/fsnotify v1.8.0 h1:dAwr6QBTBZIkG8roQaJjGof0pp0EeF+tNV7YBP3F/8M=
+github.com/fsnotify/fsnotify v1.8.0/go.mod h1:8jBTzvmWwFyi3Pb8djgCCO5IBqzKJ/Jwo8TRcHyHii0=
 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/stdr v1.2.2 h1:hSWxHoqTgW2S2qGc0LTAI563KZ5YKYRhT3MFKZMbjag=
 github.com/go-logr/stdr v1.2.2/go.mod h1:mMo/vtBO5dYbehREoey6XUKy/eSumjCCveDpRre4VKE=
-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 v1.11.3 h1:B3W9IdWbvrUu2OYQGwvU1nZtvMQJPBKgBUuweJjLj6I=
-github.com/goccy/go-yaml v1.11.3/go.mod h1:wKnAMd44+9JAAnGQpWVEgBzGt3YuTaQ4uXoHvE4m7WU=
+github.com/goccy/go-yaml v1.15.12 h1:KLUSwfrUcTU6F8sAkf23OIPYC6aFVMNFSu4btROEm6w=
+github.com/goccy/go-yaml v1.15.12/go.mod h1:XBurs7gK8ATbW4ZPGKgcbrY1Br56PdM69F7LkFRi1kA=
 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 v1.2.1 h1:OptwRhECazUx5ix5TTWC3EZhsZEHWcYWY4FQHTIubm4=
-github.com/golang/glog v1.2.1/go.mod h1:6AhwSGph0fcJtXVM/PEHPqZlFeoLxhs7/t5UDAwmO+w=
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@@ -180,10 +167,10 @@ github.com/wealdtech/go-eth2-types/v2 v2.8.2 h1:b5aXlNBLKgjAg/Fft9VvGlqAUCQMP5Lz
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@@ -192,6 +179,8 @@ github.com/wealdtech/go-eth2-wallet-encryptor-unencrypted v1.0.2 h1:IMIyl70hbJlx
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@@ -200,57 +189,59 @@ github.com/wealdtech/go-eth2-wallet-store-s3 v1.12.0 h1:noknYCbHw2soPhwke1LvC99K
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-google.golang.org/genproto/googleapis/rpc v0.0.0-20240521202816-d264139d666e h1:Elxv5MwEkCI9f5SkoL6afed6NTdxaGoAo39eANBwHL8=
-google.golang.org/genproto/googleapis/rpc v0.0.0-20240521202816-d264139d666e/go.mod h1:EfXuqaE1J41VCDicxHzUDm+8rk+7ZdXzHV0IhO/I6s0=
-google.golang.org/grpc v1.64.0 h1:KH3VH9y/MgNQg1dE7b3XfVK0GsPSIzJwdF617gUSbvY=
-google.golang.org/grpc v1.64.0/go.mod h1:oxjF8E3FBnjp+/gVFYdWacaLDx9na1aqy9oovLpxQYg=
-google.golang.org/protobuf v1.34.1 h1:9ddQBjfCyZPOHPUiPxpYESBLc+T8P3E+Vo4IbKZgFWg=
-google.golang.org/protobuf v1.34.1/go.mod h1:c6P6GXX6sHbq/GpV6MGZEdwhWPcYBgnhAHhKbcUYpos=
+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=
 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 := 0; i < limit; i++ {
+	for i := range limit {
 		basis = 1
-		for j := 0; j < limit; j++ {
+		for j := range limit {
 			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 := 0; i < parts; i++ {
+		for i := range parts {
 			x := uint8(xCoordinates[i]) + 1
 			y := p.evaluate(x)
 			out[i][idx] = y
--- a/util/attestations.go
+++ b/util/attestations.go
@@ -21,6 +21,35 @@ 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,
@@ -49,6 +78,37 @@ func AttestationHeadCorrect(ctx context.Context,
 	}
 }

+// 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
+	}
+}
+
 // AttestationTargetCorrect returns true if the given attestation had the correct target.
 func AttestationTargetCorrect(ctx context.Context,
 	headersCache *BeaconBlockHeaderCache,
Author	SHA1	Message	Date
Jim McDonald	fa1d4d60fa	Update dependencies.	2024-12-20 22:41:00 +00:00
Jim McDonald	7d00d1261f	Avoid crash when signing and verifing signatures using keys rather than accounts.	2024-10-22 22:55:08 +01:00
Jim McDonald	ac85a9539b	Update workflow.	2024-10-21 20:25:41 +01:00
Jim McDonald	099e434f43	Update workflows.	2024-10-21 19:50:23 +01:00
Jim McDonald	5bab79bd79	Update workflow.	2024-10-21 19:47:03 +01:00
Jim McDonald	1defa3b121	Merge pull request #149 from wealdtech/add-trin Add trin.	2024-10-21 19:45:18 +01:00
Jim McDonald	6cb7b034aa	Update workflows.	2024-10-21 19:42:14 +01:00
Jim McDonald	bd9659d71f	Add trin.	2024-10-21 19:00:36 +01:00
Jim McDonald	68ca31e034	Merge pull request #147 from polskikh/fix-validate-deposit-data-json Fix validating deposit message root for json output data	2024-10-04 12:16:02 +01:00
Vladislav Polskikh	a37a5f4af3	Fix validating deposit message root for json output data	2024-10-04 12:10:20 +02:00
Jim McDonald	47cf033feb	Update workflows.	2024-10-01 13:18:52 +01:00
Jim McDonald	72a9390f97	Linting.	2024-10-01 13:02:39 +01:00
Jim McDonald	0276a72de6	Fix crash when block info has no blobs.	2024-10-01 13:02:07 +01:00
Jim McDonald	fd0a89c258	More data for epoch summaries.	2024-09-04 11:51:16 +01:00
Jim McDonald	1ac505f0bd	Disable lint rule that generates false positives	2024-09-01 22:26:59 +01:00
Jim McDonald	b4124b7a27	Add keystore wallet.	2024-09-01 22:15:58 +01:00
Jim McDonald	f3ae2baf8f	Allow derived keystore to be displayed on stdout. Fixes #143	2024-08-02 09:46:25 +01:00
Jim McDonald	8aaf16ab3f	Update dependencies.	2024-07-28 18:50:47 +01:00