Merge pull request #174 from wealdtech/update-docker-workflow

Update docker build and push workflow

.github/workflows/docker.yml

@@ -0,0 +1,45 @@
+name: Docker
+
+# This workflow is triggered on a push to a tag that follows semantic versioning
+# e.g., v1.2.3, v2.0.0-rc1
+on:
+  push:
+    tags:
+      - 'v[0-9]+.[0-9]+.[0-9]+**'
+
+jobs:
+  # Build and push the Docker image
+  build-and-push:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v4
+
+      # This step extracts the version number from the tag
+      # e.g., if the tag is 'v1.2.3', this will output '1.2.3'
+      - name: Extract release version
+        id: release_version
+        run: |
+          echo "version=$(echo ${{ github.ref_name }} | sed -e 's/^v//')" >> $GITHUB_OUTPUT
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64/v8
+          push: true
+          tags: |
+            wealdtech/ethdo:${{ steps.release_version.outputs.version }}
+            wealdtech/ethdo:latest

.github/workflows/golangci-lint.yml

@@ -1,23 +1,29 @@
-name: golangci-lint
+name: 'golangci-lint'
 on:
+  pull_request:
   push:
     branches:
-    - master
-  pull_request:
+      - 'master'
+  workflow_dispatch:
 
 permissions:
-  contents: read
+  contents: 'read'
+  pull-requests: 'read'
+  checks: 'write'
 
 jobs:
   golangci:
-    name: lint
-    runs-on: ubuntu-22.04
+    name: 'lint'
+    runs-on: 'ubuntu-24.04'
     steps:
-      - uses: actions/setup-go@v3
+      - uses: 'actions/setup-go@v5'
         with:
-          go-version: '1.20'
-      - uses: actions/checkout@v3
-      - name: golangci-lint
-        uses: golangci/golangci-lint-action@v3
+          cache: false
+          go-version: '^1.22'
+      - uses: 'actions/checkout@v4'
+      - uses: 'golangci/golangci-lint-action@v6'
         with:
-          args: --timeout=60m
+          version: 'latest'
+          args: '--timeout=60m'
+          only-new-issues: true
+          skip-cache: true

.github/workflows/release.yml

@@ -3,8 +3,9 @@ name: Release
 on:
   push:
     tags:
-    - 'v*'
-    - 't*'
+      - 'v*'
+      - 't*'
+  workflow_dispatch:
 
 jobs:
   # Set variables that will be available to all builds.
@@ -44,12 +45,13 @@ jobs:
     needs: [create_release, env_vars]
     steps:
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: '^1.20'
+          cache: false
+          go-version: '^1.22'
 
       - name: Check out repository into the Go module directory
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Select correct tag
         run: git checkout ${{ github.ref_name }}
@@ -119,12 +121,13 @@ jobs:
     needs: [create_release, env_vars]
     steps:
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: '^1.20'
+          cache: false
+          go-version: '^1.22'
 
       - name: Check out repository into the Go module directory
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Select correct tag
         run: git checkout ${{ github.ref_name }}
@@ -164,12 +167,13 @@ jobs:
     needs: [create_release, env_vars]
     steps:
       - name: Set up Go
-        uses: actions/setup-go@v3
+        uses: actions/setup-go@v5
         with:
-          go-version: '^1.20'
+          cache: false
+          go-version: '^1.22'
 
       - name: Check out repository into the Go module directory
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Select correct tag
         run: git checkout ${{ github.ref_name }}

.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-22.04
+    runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v3
+      - uses: actions/setup-go@v5
         with:
-          go-version: '1.20'
-      - uses: actions/checkout@v3
-      - uses: n8maninger/action-golang-test@v1
+          cache: false
+          go-version: '^1.22'
+      - uses: actions/checkout@v4
+      - uses: n8maninger/action-golang-test@v2

.gitignore

@@ -15,6 +15,12 @@ coverage.html
 # Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
 .glide/
 
+# Intellij
+.idea/
+
+# Makefile
+Makefile
+
 # Vim
 *.sw?
 

.golangci.yml

@@ -4,6 +4,16 @@
 # This file is not a configuration example,
 # it contains the exhaustive configuration with explanations of the options.
 
+issues:
+  # Which files to exclude: they will be analyzed, but issues from them won't be reported.
+  # There is no need to include all autogenerated files,
+  # we confidently recognize autogenerated files.
+  # If it's not, please let us know.
+  # "/" will be replaced by current OS file path separator to properly work on Windows.
+  # Default: []
+  exclude-files:
+    - ".*_ssz\\.go$"
+
 # Options for analysis running.
 run:
   # The default concurrency value is the number of available CPU.
@@ -39,15 +49,6 @@ run:
   # Default: true
   # skip-dirs-use-default: false
 
-  # Which files to skip: they will be analyzed, but issues from them won't be reported.
-  # Default value is empty list,
-  # but there is no need to include all autogenerated files,
-  # we confidently recognize autogenerated files.
-  # If it's not please let us know.
-  # "/" will be replaced by current OS file path separator to properly work on Windows.
-  skip-files:
-    - ".*_ssz\\.go$"
-
   # If set we pass it to "go list -mod={option}". From "go help modules":
   # If invoked with -mod=readonly, the go command is disallowed from the implicit
   # automatic updating of go.mod described above. Instead, it fails when any changes
@@ -68,43 +69,22 @@ 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
 output:
-  # Format: colored-line-number|line-number|json|tab|checkstyle|code-climate|junit-xml|github-actions
-  #
-  # Multiple can be specified by separating them by comma, output can be provided
-  # for each of them by separating format name and path by colon symbol.
-  # Output path can be either `stdout`, `stderr` or path to the file to write to.
-  # Example: "checkstyle:report.json,colored-line-number"
-  #
-  # Default: colored-line-number
-  # format: json
-
-  # Print lines of code with issue.
-  # Default: true
-  # print-issued-lines: false
-
-  # Print linter name in the end of issue text.
-  # Default: true
-  # print-linter-name: false
-
-  # Make issues output unique by line.
-  # Default: true
-  # uniq-by-line: false
-
-  # Add a prefix to the output file references.
-  # Default is no prefix.
-  # path-prefix: ""
-
-  # Sort results by: filepath, line and column.
-  # sort-results: true
-
+  formats:
+    - format: colored-line-number
+      path: stderr
 
 # 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
 
@@ -127,11 +107,11 @@ linters:
   disable:
     - contextcheck
     - cyclop
-    - deadcode
+    - depguard
     - dupl
+    - err113
     - errorlint
     - exhaustive
-    - exhaustivestruct
     - exhaustruct
     - forbidigo
     - forcetypeassert
@@ -141,29 +121,22 @@ linters:
     - gochecknoinits
     - gocognit
     - goconst
-    - goerr113
     - goheader
-    - golint
-    - gomnd
-    - ifshort
-    - interfacer
     - ireturn
     - lll
     - maintidx
-    - maligned
+    - mnd
     - musttag
     - nestif
     - nilnil
     - nlreturn
     - nolintlint
-    - nosnakecase
+    - perfsprint
     - promlinter
     - rowserrcheck
-    - scopelint
     - sqlclosecheck
-    - structcheck
+    - tenv
     - unparam
-    - varcheck
     - varnamelen
     - wastedassign
     - wrapcheck

CHANGELOG.md

@@ -1,3 +1,110 @@
+dev:
+ 
+1.39.0:
+ - support Fulu 
+
+1.38.0:
+ - update latest version of go-eth2-client to support complex Spec types
+ - adapt event handling to use new event handler structures in go-eth2-client  
+
+1.37.4:
+ - add support for eip-7044 in exit verify command
+ - provide ETH values as well as validator numbers in "epoch summary"
+
+1.37.3:
+ - add "hoodi" to the list of supported networks
+
+1.37.2:
+ - add "block trail"
+
+1.37.1:
+ - handle missing blobs for block info
+ - fix `--epoch` flag for epoch summary
+
+1.37.0:
+ - support Electra
+ - add `--compounding` flag when creating validator deposit data
+
+1.36.6:
+  - allow specification of blockid for validator info
+  - validator depositdata orders deposits from an HD wallet by path
+
+1.36.5:
+  - avoid corner case mnemonic derivation with 25th word
+
+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:
+  - provide better error message on context deadlline exceeded
+  - update launchpad output to match latest version
+  - add deposit contract address to "chain info"
+
+1.35.2:
+  - update dependencies
+
+1.35.1:
+  - fix output for various commands that may encounter an empty slot
+
+1.35.0:
+  - support Deneb
+  - add start and end dates for eth1votes period
+
+1.34.1:
+  - fix period parsing for "synccommittee members" command
+
+1.34.0:
+  - update dependencies
+  - use Capella fork for all exits
+  - support Deneb beta 5
+
+1.33.2:
+  - fix windows build
+
+1.33.1:
+  - add "slot" to "proposer duties" command
+  - add activation epoch and time to "validator info" command where applicable
+  - add "holesky" to the list of supported networks
+  - avoid crash when requesting validators from beacon node without debug enabled
+
+1.33.0:
+  - show all slots with 'synccommittee inclusion'
+  - add "wallet batch" command
+
+1.32.0:
+  - fix incorrect error when "deposit verify" is not given a withdrawal address
+  - allow truncated mnemonics (first four characters of each word)
+  - add deneb information to "block info"
+  - add epoch parameter to "validator yield"
+  - add proposer index to "block info"
+  - "block info" honours "--quiet" flag
+  - "block info" accepts "--block-time" option
+  - increase default operation timeout from 10s to 30s
+  - "epoch summary" JSON lists number of blobs
+
+1.31.0:
+  - initial support for deneb
+  - add "--generate-keystore" option for "account derive"
+  - update "validator exit" command to be able to generate multiple exits
+  - support for 12-word and 18-word mnemonics with single-word (no whitespace) passphrases
+  - add JSON output for "validator expectation"
+
 1.30.0:
   - add "chain spec" command
   - add "validator withdrawal" command

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.20-bullseye as builder
+FROM golang:1.23-bookworm AS builder
 
 WORKDIR /app
 
@@ -10,7 +10,7 @@ COPY . .
 
 RUN go build
 
-FROM debian:bullseye-slim
+FROM debian:bookworm-slim
 
 RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt install -y ca-certificates && apt-get clean && rm -rf /var/lib/apt/lists/*
 

README.md

@@ -38,7 +38,7 @@ docker pull wealdtech/ethdo
 go install github.com/wealdtech/ethdo@latest
 ```
 
-Note that `ethdo` requires at least version 1.13 of go to operate.  The version of go can be found with `go version`.
+Note that `ethdo` requires at least version 1.20 of go to operate.  The version of go can be found with `go version`.
 
 If this does not work please see the [troubleshooting](https://github.com/wealdtech/ethdo/blob/master/docs/troubleshooting.md) page.
 
@@ -151,9 +151,13 @@ Amazon S3-compatible stores have additional options available, which can be conf
 {
   "stores": {
     "s3": {
-      "bucket":"mybucketname",
-      "path":"path/in/bucket",
-      "passphrase":"secret"
+      "region": "us-west-1",
+      "bucket": "my-s3-store",
+      "path": "/wallets",
+      "credentials": {
+        "id": "ABCDEF123",
+        "secret": "XXXXXXXXX"
+      }
     }
   }
 }
@@ -171,6 +175,15 @@ If set, the `--debug` argument will output additional information about the oper
 
 Commands will have an exit status of 0 on success and 1 on failure.  The specific definition of success is specified in the help for each command.
 
+### Validator specifier
+
+Ethereum validators can be specified in a number of different ways.  The options are:
+
+- an `ethdo` account, in the format _wallet_/_account_.  It is possible to use the validator specified in this way to sign validator-related operations, if the passphrase is also supplied, with a passphrase (for local accounts) or authority (for remote accounts)
+- the validator's 48-byte public key.  It is not possible to use the a validator specified in this way to sign validator-related operations
+- a keystore, supplied either as direct JSON or as a path to a keystore on the local filesystem.  It is possible to use the validator specified in this way to sign validator-related operations, if the passphrase is also supplied
+- the validator's numeric index.  It is not possible to use a validator specified in this way to sign validator-related operations.  Note that this only works with on-chain operations, as the validator's index must be resolved to its public key
+
 ## Passphrase strength
 
 `ethdo` will by default not allow creation or export of accounts or wallets with weak passphrases.  If a weak pasphrase is used then `ethdo` will refuse to continue.

beacon/chaininfo.go

@@ -18,10 +18,12 @@ import (
 	"encoding/hex"
 	"encoding/json"
 	"fmt"
+	"sort"
 	"strconv"
 	"strings"
 
 	consensusclient "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/wealdtech/ethdo/services/chaintime"
@@ -34,6 +36,7 @@ type ChainInfo struct {
 	GenesisValidatorsRoot          phase0.Root
 	Epoch                          phase0.Epoch
 	GenesisForkVersion             phase0.Version
+	ExitForkVersion                phase0.Version
 	CurrentForkVersion             phase0.Version
 	BLSToExecutionChangeDomainType phase0.DomainType
 	VoluntaryExitDomainType        phase0.DomainType
@@ -45,6 +48,7 @@ type chainInfoJSON struct {
 	GenesisValidatorsRoot          string           `json:"genesis_validators_root"`
 	Epoch                          string           `json:"epoch"`
 	GenesisForkVersion             string           `json:"genesis_fork_version"`
+	ExitForkVersion                string           `json:"exit_fork_version"`
 	CurrentForkVersion             string           `json:"current_fork_version"`
 	BLSToExecutionChangeDomainType string           `json:"bls_to_execution_change_domain_type"`
 	VoluntaryExitDomainType        string           `json:"voluntary_exit_domain_type"`
@@ -57,11 +61,12 @@ type chainInfoVersionJSON struct {
 // MarshalJSON implements json.Marshaler.
 func (c *ChainInfo) MarshalJSON() ([]byte, error) {
 	return json.Marshal(&chainInfoJSON{
-		Version:                        fmt.Sprintf("%d", c.Version),
+		Version:                        strconv.FormatUint(c.Version, 10),
 		Validators:                     c.Validators,
 		GenesisValidatorsRoot:          fmt.Sprintf("%#x", c.GenesisValidatorsRoot),
 		Epoch:                          fmt.Sprintf("%d", c.Epoch),
 		GenesisForkVersion:             fmt.Sprintf("%#x", c.GenesisForkVersion),
+		ExitForkVersion:                fmt.Sprintf("%#x", c.ExitForkVersion),
 		CurrentForkVersion:             fmt.Sprintf("%#x", c.CurrentForkVersion),
 		BLSToExecutionChangeDomainType: fmt.Sprintf("%#x", c.BLSToExecutionChangeDomainType),
 		VoluntaryExitDomainType:        fmt.Sprintf("%#x", c.VoluntaryExitDomainType),
@@ -82,7 +87,7 @@ func (c *ChainInfo) UnmarshalJSON(input []byte) error {
 	if err != nil {
 		return errors.Wrap(err, "version invalid")
 	}
-	if version < 2 {
+	if version < 3 {
 		return errors.New("outdated version; please regenerate your offline data")
 	}
 	c.Version = version
@@ -130,6 +135,18 @@ func (c *ChainInfo) UnmarshalJSON(input []byte) error {
 	}
 	copy(c.GenesisForkVersion[:], genesisForkVersionBytes)
 
+	if data.ExitForkVersion == "" {
+		return errors.New("exit fork version missing")
+	}
+	exitForkVersionBytes, err := hex.DecodeString(strings.TrimPrefix(data.ExitForkVersion, "0x"))
+	if err != nil {
+		return errors.Wrap(err, "exit fork version invalid")
+	}
+	if len(exitForkVersionBytes) != phase0.ForkVersionLength {
+		return errors.New("exit fork version incorrect length")
+	}
+	copy(c.ExitForkVersion[:], exitForkVersionBytes)
+
 	if data.CurrentForkVersion == "" {
 		return errors.New("current fork version missing")
 	}
@@ -235,18 +252,18 @@ func ObtainChainInfoFromNode(ctx context.Context,
 	error,
 ) {
 	res := &ChainInfo{
-		Version:    2,
+		Version:    3,
 		Validators: make([]*ValidatorInfo, 0),
 		Epoch:      chainTime.CurrentEpoch(),
 	}
 
 	// Obtain validators.
-	validators, err := consensusClient.(consensusclient.ValidatorsProvider).Validators(ctx, "head", nil)
+	validatorsResponse, err := consensusClient.(consensusclient.ValidatorsProvider).Validators(ctx, &api.ValidatorsOpts{State: "head"})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain validators")
 	}
 
-	for _, validator := range validators {
+	for _, validator := range validatorsResponse.Data {
 		res.Validators = append(res.Validators, &ValidatorInfo{
 			Index:                 validator.Index,
 			Pubkey:                validator.Validator.PublicKey,
@@ -254,22 +271,26 @@ func ObtainChainInfoFromNode(ctx context.Context,
 			State:                 validator.Status,
 		})
 	}
+	// Order validators by index.
+	sort.Slice(res.Validators, func(i int, j int) bool {
+		return res.Validators[i].Index < res.Validators[j].Index
+	})
 
 	// Genesis validators root obtained from beacon node.
-	genesis, err := consensusClient.(consensusclient.GenesisProvider).Genesis(ctx)
+	genesisResponse, err := consensusClient.(consensusclient.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain genesis information")
 	}
-	res.GenesisValidatorsRoot = genesis.GenesisValidatorsRoot
+	res.GenesisValidatorsRoot = genesisResponse.Data.GenesisValidatorsRoot
 
 	// Fetch the genesis fork version from the specification.
-	spec, err := consensusClient.(consensusclient.SpecProvider).Spec(ctx)
+	specResponse, err := consensusClient.(consensusclient.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain spec")
 	}
-	tmp, exists := spec["GENESIS_FORK_VERSION"]
+	tmp, exists := specResponse.Data["GENESIS_FORK_VERSION"]
 	if !exists {
-		return nil, errors.New("capella fork version not known by chain")
+		return nil, errors.New("genesis fork version not known by chain")
 	}
 	var isForkVersion bool
 	res.GenesisForkVersion, isForkVersion = tmp.(phase0.Version)
@@ -277,24 +298,34 @@ func ObtainChainInfoFromNode(ctx context.Context,
 		return nil, errors.New("could not obtain GENESIS_FORK_VERSION")
 	}
 
+	// Fetch the exit fork version (Capella) from the specification.
+	tmp, exists = specResponse.Data["CAPELLA_FORK_VERSION"]
+	if !exists {
+		return nil, errors.New("capella fork version not known by chain")
+	}
+	res.ExitForkVersion, isForkVersion = tmp.(phase0.Version)
+	if !isForkVersion {
+		return nil, errors.New("could not obtain CAPELLA_FORK_VERSION")
+	}
+
 	// Fetch the current fork version from the fork schedule.
-	forkSchedule, err := consensusClient.(consensusclient.ForkScheduleProvider).ForkSchedule(ctx)
+	forkScheduleResponse, err := consensusClient.(consensusclient.ForkScheduleProvider).ForkSchedule(ctx, &api.ForkScheduleOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain fork schedule")
 	}
-	for i := range forkSchedule {
-		if forkSchedule[i].Epoch <= res.Epoch {
-			res.CurrentForkVersion = forkSchedule[i].CurrentVersion
+	for i := range forkScheduleResponse.Data {
+		if forkScheduleResponse.Data[i].Epoch <= res.Epoch {
+			res.CurrentForkVersion = forkScheduleResponse.Data[i].CurrentVersion
 		}
 	}
 
-	blsToExecutionChangeDomainType, exists := spec["DOMAIN_BLS_TO_EXECUTION_CHANGE"].(phase0.DomainType)
+	blsToExecutionChangeDomainType, exists := specResponse.Data["DOMAIN_BLS_TO_EXECUTION_CHANGE"].(phase0.DomainType)
 	if !exists {
 		return nil, errors.New("failed to obtain DOMAIN_BLS_TO_EXECUTION_CHANGE")
 	}
 	copy(res.BLSToExecutionChangeDomainType[:], blsToExecutionChangeDomainType[:])
 
-	voluntaryExitDomainType, exists := spec["DOMAIN_VOLUNTARY_EXIT"].(phase0.DomainType)
+	voluntaryExitDomainType, exists := specResponse.Data["DOMAIN_VOLUNTARY_EXIT"].(phase0.DomainType)
 	if !exists {
 		return nil, errors.New("failed to obtain DOMAIN_VOLUNTARY_EXIT")
 	}

cmd/account/create/process.go

@@ -86,7 +86,7 @@ func processPathed(ctx context.Context, data *dataIn) (*dataOut, error) {
 	if data.passphrase == "" {
 		return nil, errors.New("passphrase is required")
 	}
-	match, err := regexp.Match("^m/[0-9]+/[0-9]+(/[0-9+])+", []byte(data.path))
+	match, err := regexp.MatchString("^m/[0-9]+/[0-9]+(/[0-9+])+", data.path)
 	if err != nil {
 		return nil, errors.Wrap(err, "unable to match path to regular expression")
 	}

cmd/account/create/run.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
@@ -15,8 +15,8 @@ package accountcreate
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if !viper.GetBool("verbose") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/account/derive/input.go

@@ -1,4 +1,4 @@
-// Copyright © 2020 Weald Technology Trading
+// Copyright © 2020, 2023 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
@@ -22,12 +22,14 @@ import (
 
 type dataIn struct {
 	quiet bool
+	json  bool
 	// Derivation information.
 	mnemonic string
 	path     string
 	// Output options.
 	showPrivateKey            bool
 	showWithdrawalCredentials bool
+	generateKeystore          bool
 }
 
 func input(_ context.Context) (*dataIn, error) {
@@ -36,6 +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")
@@ -54,5 +59,8 @@ func input(_ context.Context) (*dataIn, error) {
 	// Show withdrawal credentials.
 	data.showWithdrawalCredentials = viper.GetBool("show-withdrawal-credentials")
 
+	// Generate keystore.
+	data.generateKeystore = viper.GetBool("generate-keystore")
+
 	return data, nil
 }

cmd/account/derive/output.go

@@ -1,4 +1,4 @@
-// Copyright © 2020 Weald Technology Trading
+// Copyright © 2020, 2023 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
@@ -15,21 +15,31 @@ package accountderive
 
 import (
 	"context"
+	"encoding/hex"
+	"encoding/json"
 	"fmt"
+	"os"
 	"strings"
+	"time"
 
+	"github.com/google/uuid"
 	"github.com/pkg/errors"
+	"github.com/wealdtech/ethdo/util"
 	e2types "github.com/wealdtech/go-eth2-types/v2"
-	util "github.com/wealdtech/go-eth2-util"
+	ethutil "github.com/wealdtech/go-eth2-util"
+	keystorev4 "github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4"
 )
 
 type dataOut struct {
+	json                      bool
 	showPrivateKey            bool
 	showWithdrawalCredentials bool
+	generateKeystore          bool
 	key                       *e2types.BLSPrivateKey
+	path                      string
 }
 
-func output(_ context.Context, data *dataOut) (string, error) {
+func output(ctx context.Context, data *dataOut) (string, error) {
 	if data == nil {
 		return "", errors.New("no data")
 	}
@@ -37,13 +47,17 @@ func output(_ context.Context, data *dataOut) (string, error) {
 		return "", errors.New("no key")
 	}
 
+	if data.generateKeystore {
+		return outputKeystore(ctx, data)
+	}
+
 	builder := strings.Builder{}
 
 	if data.showPrivateKey {
 		builder.WriteString(fmt.Sprintf("Private key: %#x\n", data.key.Marshal()))
 	}
 	if data.showWithdrawalCredentials {
-		withdrawalCredentials := util.SHA256(data.key.PublicKey().Marshal())
+		withdrawalCredentials := ethutil.SHA256(data.key.PublicKey().Marshal())
 		withdrawalCredentials[0] = byte(0) // BLS_WITHDRAWAL_PREFIX
 		builder.WriteString(fmt.Sprintf("Withdrawal credentials: %#x\n", withdrawalCredentials))
 	}
@@ -53,3 +67,42 @@ func output(_ context.Context, data *dataOut) (string, error) {
 
 	return builder.String(), nil
 }
+
+func outputKeystore(_ context.Context, data *dataOut) (string, error) {
+	passphrase, err := util.GetPassphrase()
+	if err != nil {
+		return "", errors.New("no passphrase supplied")
+	}
+
+	encryptor := keystorev4.New()
+	crypto, err := encryptor.Encrypt(data.key.Marshal(), passphrase)
+	if err != nil {
+		return "", errors.New("failed to encrypt private key")
+	}
+
+	uuid, err := uuid.NewRandom()
+	if err != nil {
+		return "", errors.New("failed to generate UUID")
+	}
+	ks := make(map[string]interface{})
+	ks["uuid"] = uuid.String()
+	ks["pubkey"] = hex.EncodeToString(data.key.PublicKey().Marshal())
+	ks["version"] = 4
+	ks["path"] = data.path
+	ks["crypto"] = crypto
+	out, err := json.Marshal(ks)
+	if err != nil {
+		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())
+
+		if err := os.WriteFile(keystoreFilename, out, 0o600); err != nil {
+			return "", errors.Wrap(err, fmt.Sprintf("failed to write %s", keystoreFilename))
+		}
+	}
+	return "", nil
+}

cmd/account/derive/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2020 Weald Technology Trading
+// Copyright © 2020, 2023 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
@@ -38,9 +38,12 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	}
 
 	results := &dataOut{
+		json:                      data.json,
 		showPrivateKey:            data.showPrivateKey,
 		showWithdrawalCredentials: data.showWithdrawalCredentials,
+		generateKeystore:          data.generateKeystore,
 		key:                       key.(*e2types.BLSPrivateKey),
+		path:                      data.path,
 	}
 
 	return results, nil

cmd/account/derive/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2020 Weald Technology Trading
+// Copyright © 2020, 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
@@ -15,9 +15,9 @@ package accountderive
 
 import (
 	"context"
+	"errors"
 	"strings"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
 
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to obtain input"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if dataIn.quiet {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return strings.TrimSuffix(results, "\n"), nil

cmd/account/import/run.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
@@ -15,8 +15,8 @@ package accountimport
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to obtain input"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if !viper.GetBool("verbose") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/account/key/run.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
@@ -15,8 +15,8 @@ package accountkey
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/accountcreate.go

@@ -29,7 +29,7 @@ var accountCreateCmd = &cobra.Command{
     ethdo account create --account="primary/operations" --passphrase="my secret"
 
 In quiet mode this will return 0 if the account is created successfully, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := accountcreate.Run(cmd)
 		if err != nil {
 			return err

cmd/accountderive.go

@@ -29,7 +29,7 @@ var accountDeriveCmd = &cobra.Command{
     ethdo account derive --mnemonic="..." --path="m/12381/3600/0/0"
 
 In quiet mode this will return 0 if the inputs can derive an account account, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := accountderive.Run(cmd)
 		if err != nil {
 			return err
@@ -49,6 +49,8 @@ func init() {
 	accountFlags(accountDeriveCmd)
 	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) {
@@ -58,4 +60,10 @@ func accountDeriveBindings(cmd *cobra.Command) {
 	if err := viper.BindPFlag("show-withdrawal-credentials", cmd.Flags().Lookup("show-withdrawal-credentials")); err != nil {
 		panic(err)
 	}
+	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)
+	}
 }

cmd/accountimport.go

@@ -29,7 +29,7 @@ var accountImportCmd = &cobra.Command{
     ethdo account import --account="primary/testing" --key="0x..." --passphrase="my secret"
 
 In quiet mode this will return 0 if the account is imported successfully, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := accountimport.Run(cmd)
 		if err != nil {
 			return err

cmd/accountinfo.go

@@ -33,7 +33,7 @@ var accountInfoCmd = &cobra.Command{
     ethdo account info --account="primary/my funds"
 
 In quiet mode this will return 0 if the account exists, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx, cancel := context.WithTimeout(context.Background(), viper.GetDuration("timeout"))
 		defer cancel()
 

cmd/accountkey.go

@@ -30,7 +30,7 @@ var accountKeyCmd = &cobra.Command{
     ethdo account key --account="Personal wallet/Operations" --passphrase="my account passphrase"
 
 In quiet mode this will return 0 if the key can be obtained, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := accountkey.Run(cmd)
 		if err != nil {
 			return err

cmd/accountlock.go

@@ -29,7 +29,7 @@ var accountLockCmd = &cobra.Command{
     ethdo account lock --account="primary/my funds"
 
 In quiet mode this will return 0 if the account is locked, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx, cancel := context.WithTimeout(context.Background(), viper.GetDuration("timeout"))
 		defer cancel()
 

cmd/accountunlock.go

@@ -30,7 +30,7 @@ var accountUnlockCmd = &cobra.Command{
     ethdo account unlock --account="primary/my funds" --passphrase="secret"
 
 In quiet mode this will return 0 if the account is unlocked, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx, cancel := context.WithTimeout(context.Background(), viper.GetDuration("timeout"))
 		defer cancel()
 

cmd/attester/duties/input.go

@@ -72,7 +72,7 @@ func input(ctx context.Context) (*dataIn, error) {
 
 	data.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(data.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(data.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(data.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to set up chaintime service")

cmd/attester/duties/process.go

@@ -17,7 +17,8 @@ import (
 	"context"
 
 	eth2client "github.com/attestantio/go-eth2-client"
-	api "github.com/attestantio/go-eth2-client/api/v1"
+	"github.com/attestantio/go-eth2-client/api"
+	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/wealdtech/ethdo/util"
@@ -49,12 +50,16 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	return results, nil
 }
 
-func duty(ctx context.Context, eth2Client eth2client.Service, validator *api.Validator, epoch spec.Epoch) (*api.AttesterDuty, error) {
+func duty(ctx context.Context, eth2Client eth2client.Service, validator *apiv1.Validator, epoch spec.Epoch) (*apiv1.AttesterDuty, error) {
 	// Find the attesting slot for the given epoch.
-	duties, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, epoch, []spec.ValidatorIndex{validator.Index})
+	dutiesResponse, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, &api.AttesterDutiesOpts{
+		Epoch:   epoch,
+		Indices: []spec.ValidatorIndex{validator.Index},
+	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain attester duties")
 	}
+	duties := dutiesResponse.Data
 
 	if len(duties) == 0 {
 		return nil, errors.New("validator does not have duty for that epoch")

cmd/attester/duties/process_internal_test.go

@@ -37,7 +37,7 @@ func TestProcess(t *testing.T) {
 
 	chainTime, err := standardchaintime.New(context.Background(),
 		standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(eth2Client.(eth2client.GenesisProvider)),
 	)
 	require.NoError(t, err)
 

cmd/attester/duties/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading
+// Copyright © 2021, 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
@@ -15,8 +15,8 @@ package attesterduties
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/attester/inclusion/input.go

@@ -69,7 +69,7 @@ func input(ctx context.Context) (*dataIn, error) {
 
 	data.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(data.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(data.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(data.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to set up chaintime service")

cmd/attester/inclusion/output.go

@@ -16,8 +16,10 @@ package attesterinclusion
 import (
 	"context"
 	"fmt"
+	"strconv"
 	"strings"
 
+	"github.com/attestantio/go-eth2-client/spec"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 )
@@ -26,7 +28,7 @@ type dataOut struct {
 	debug            bool
 	quiet            bool
 	verbose          bool
-	attestation      *phase0.Attestation
+	attestation      *spec.VersionedAttestation
 	slot             phase0.Slot
 	attestationIndex uint64
 	inclusionDelay   phase0.Slot
@@ -49,7 +51,7 @@ func output(_ context.Context, data *dataOut) (string, error) {
 			buf.WriteString("Attestation included in block ")
 			buf.WriteString(fmt.Sprintf("%d", data.slot))
 			buf.WriteString(", index ")
-			buf.WriteString(fmt.Sprintf("%d", data.attestationIndex))
+			buf.WriteString(strconv.FormatUint(data.attestationIndex, 10))
 			if data.verbose {
 				buf.WriteString("\nInclusion delay: ")
 				buf.WriteString(fmt.Sprintf("%d", data.inclusionDelay))

cmd/attester/inclusion/process.go

@@ -17,9 +17,12 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	"net/http"
 
 	eth2client "github.com/attestantio/go-eth2-client"
-	api "github.com/attestantio/go-eth2-client/api/v1"
+	"github.com/attestantio/go-eth2-client/api"
+	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
+	"github.com/attestantio/go-eth2-client/spec"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
@@ -38,7 +41,7 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 
 	data.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(data.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(data.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(data.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to set up chaintime service")
@@ -61,14 +64,22 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	startSlot := duty.Slot + 1
 	endSlot := startSlot + 32
 	for slot := startSlot; slot < endSlot; slot++ {
-		signedBlock, err := data.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, fmt.Sprintf("%d", slot))
+		blockResponse, err := data.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+			Block: fmt.Sprintf("%d", slot),
+		})
 		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+				// No block for this slot, that's fine.
+				continue
+			}
 			return nil, errors.Wrap(err, "failed to obtain block")
 		}
-		if signedBlock == nil {
+		block := blockResponse.Data
+		if block == nil {
 			continue
 		}
-		blockSlot, err := signedBlock.Slot()
+		blockSlot, err := block.Slot()
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to obtain block slot")
 		}
@@ -78,14 +89,23 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		if data.debug {
 			fmt.Printf("Fetched block for slot %d\n", slot)
 		}
-		attestations, err := signedBlock.Attestations()
+		attestations, err := block.Attestations()
 		if err != nil {
 			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 {
@@ -118,55 +138,79 @@ 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, attestation *spec.VersionedAttestation) (bool, error) {
+	attestationData, err := attestation.Data()
+	if err != nil {
+		return false, errors.Wrap(err, "failed to obtain attestation data")
+	}
+
+	slot := attestationData.Slot
 	for {
-		header, err := data.eth2Client.(eth2client.BeaconBlockHeadersProvider).BeaconBlockHeader(ctx, fmt.Sprintf("%d", slot))
+		response, err := data.eth2Client.(eth2client.BeaconBlockHeadersProvider).BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{
+			Block: fmt.Sprintf("%d", slot),
+		})
 		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+				// No block.
+				slot--
+				continue
+			}
+
 			return false, err
 		}
-		if header == nil {
-			// No block.
-			slot--
-			continue
-		}
-		if !header.Canonical {
+		if !response.Data.Canonical {
 			// Not canonical.
 			slot--
 			continue
 		}
-		return bytes.Equal(header.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, attestation *spec.VersionedAttestation) (bool, error) {
+	attestationData, err := attestation.Data()
+	if err != nil {
+		return false, errors.Wrap(err, "failed to obtain attestation data")
+	}
+
 	// Start with first slot of the target epoch.
-	slot := data.chainTime.FirstSlotOfEpoch(attestation.Data.Target.Epoch)
+	slot := data.chainTime.FirstSlotOfEpoch(attestationData.Target.Epoch)
 	for {
-		header, err := data.eth2Client.(eth2client.BeaconBlockHeadersProvider).BeaconBlockHeader(ctx, fmt.Sprintf("%d", slot))
+		response, err := data.eth2Client.(eth2client.BeaconBlockHeadersProvider).BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{
+			Block: fmt.Sprintf("%d", slot),
+		})
 		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+				// No block.
+				slot--
+				continue
+			}
+
 			return false, err
 		}
-		if header == nil {
-			// No block.
-			slot--
-			continue
-		}
-		if !header.Canonical {
+		if !response.Data.Canonical {
 			// Not canonical.
 			slot--
 			continue
 		}
-		return bytes.Equal(header.Root[:], attestation.Data.Target.Root[:]), nil
+
+		return bytes.Equal(response.Data.Root[:], attestationData.Target.Root[:]), nil
 	}
 }
 
-func duty(ctx context.Context, eth2Client eth2client.Service, validator *api.Validator, epoch phase0.Epoch) (*api.AttesterDuty, error) {
+func duty(ctx context.Context, eth2Client eth2client.Service, validator *apiv1.Validator, epoch phase0.Epoch) (*apiv1.AttesterDuty, error) {
 	// Find the attesting slot for the given epoch.
-	duties, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, epoch, []phase0.ValidatorIndex{validator.Index})
+	dutiesResponse, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, &api.AttesterDutiesOpts{
+		Epoch:   epoch,
+		Indices: []phase0.ValidatorIndex{validator.Index},
+	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain attester duties")
 	}
+	duties := dutiesResponse.Data
 
 	if len(duties) == 0 {
 		return nil, errors.New("validator does not have duty for that epoch")

cmd/attester/inclusion/process_internal_test.go

@@ -37,7 +37,7 @@ func TestProcess(t *testing.T) {
 
 	chainTime, err := standardchaintime.New(context.Background(),
 		standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(eth2Client.(eth2client.GenesisProvider)),
 	)
 	require.NoError(t, err)
 

cmd/attester/inclusion/run.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
@@ -15,8 +15,8 @@ package attesterinclusion
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/attesterduties.go

@@ -29,7 +29,7 @@ var attesterDutiesCmd = &cobra.Command{
     ethdo attester duties --validator=Validators/00001 --epoch=12345
 
 In quiet mode this will return 0 if a duty from the attester is found, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := attesterduties.Run(cmd)
 		if err != nil {
 			return err

cmd/attesterinclusion.go

@@ -29,7 +29,7 @@ var attesterInclusionCmd = &cobra.Command{
     ethdo attester inclusion --validator=Validators/00001 --epoch=12345
 
 In quiet mode this will return 0 if an attestation from the attester is found on the block of the given epoch, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := attesterinclusion.Run(cmd)
 		if err != nil {
 			return err

cmd/block/analyze/command.go

@@ -55,7 +55,7 @@ type command struct {
 	weightDenominator  uint64
 
 	// Processing.
-	priorAttestations map[string]*attestationData
+	priorAttestations map[string]*attestationDataInfo
 	// Head roots provides the root of the head slot at given slots.
 	headRoots map[phase0.Slot]phase0.Root
 	// Target roots provides the root of the target epoch at given slots.
@@ -77,20 +77,20 @@ type blockAnalysis struct {
 }
 
 type attestationAnalysis struct {
-	Head          phase0.Root      `json:"head"`
-	Target        phase0.Root      `json:"target"`
-	Distance      int              `json:"distance"`
-	Duplicate     *attestationData `json:"duplicate,omitempty"`
-	NewVotes      int              `json:"new_votes"`
-	Votes         int              `json:"votes"`
-	PossibleVotes int              `json:"possible_votes"`
-	HeadCorrect   bool             `json:"head_correct"`
-	HeadTimely    bool             `json:"head_timely"`
-	SourceTimely  bool             `json:"source_timely"`
-	TargetCorrect bool             `json:"target_correct"`
-	TargetTimely  bool             `json:"target_timely"`
-	Score         float64          `json:"score"`
-	Value         float64          `json:"value"`
+	Head          phase0.Root          `json:"head"`
+	Target        phase0.Root          `json:"target"`
+	Distance      int                  `json:"distance"`
+	Duplicate     *attestationDataInfo `json:"duplicate,omitempty"`
+	NewVotes      int                  `json:"new_votes"`
+	Votes         int                  `json:"votes"`
+	PossibleVotes int                  `json:"possible_votes"`
+	HeadCorrect   bool                 `json:"head_correct"`
+	HeadTimely    bool                 `json:"head_timely"`
+	SourceTimely  bool                 `json:"source_timely"`
+	TargetCorrect bool                 `json:"target_correct"`
+	TargetTimely  bool                 `json:"target_timely"`
+	Score         float64              `json:"score"`
+	Value         float64              `json:"value"`
 }
 
 type syncCommitteeAnalysis struct {
@@ -100,7 +100,7 @@ type syncCommitteeAnalysis struct {
 	Value                 float64 `json:"value"`
 }
 
-type attestationData struct {
+type attestationDataInfo struct {
 	Block phase0.Slot `json:"block"`
 	Index int         `json:"index"`
 }
@@ -110,7 +110,7 @@ func newCommand(_ context.Context) (*command, error) {
 		quiet:             viper.GetBool("quiet"),
 		verbose:           viper.GetBool("verbose"),
 		debug:             viper.GetBool("debug"),
-		priorAttestations: make(map[string]*attestationData),
+		priorAttestations: make(map[string]*attestationDataInfo),
 		headRoots:         make(map[phase0.Slot]phase0.Root),
 		targetRoots:       make(map[phase0.Slot]phase0.Root),
 		votes:             make(map[phase0.Slot]map[phase0.CommitteeIndex]bitfield.Bitlist),

cmd/block/analyze/output.go

@@ -17,6 +17,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"strconv"
 	"strings"
 )
 
@@ -33,20 +34,20 @@ func (c *command) output(ctx context.Context) (string, error) {
 }
 
 type attestationAnalysisJSON struct {
-	Head          string           `json:"head"`
-	Target        string           `json:"target"`
-	Distance      int              `json:"distance"`
-	Duplicate     *attestationData `json:"duplicate,omitempty"`
-	NewVotes      int              `json:"new_votes"`
-	Votes         int              `json:"votes"`
-	PossibleVotes int              `json:"possible_votes"`
-	HeadCorrect   bool             `json:"head_correct"`
-	HeadTimely    bool             `json:"head_timely"`
-	SourceTimely  bool             `json:"source_timely"`
-	TargetCorrect bool             `json:"target_correct"`
-	TargetTimely  bool             `json:"target_timely"`
-	Score         float64          `json:"score"`
-	Value         float64          `json:"value"`
+	Head          string               `json:"head"`
+	Target        string               `json:"target"`
+	Distance      int                  `json:"distance"`
+	Duplicate     *attestationDataInfo `json:"duplicate,omitempty"`
+	NewVotes      int                  `json:"new_votes"`
+	Votes         int                  `json:"votes"`
+	PossibleVotes int                  `json:"possible_votes"`
+	HeadCorrect   bool                 `json:"head_correct"`
+	HeadTimely    bool                 `json:"head_timely"`
+	SourceTimely  bool                 `json:"source_timely"`
+	TargetCorrect bool                 `json:"target_correct"`
+	TargetTimely  bool                 `json:"target_timely"`
+	Score         float64              `json:"score"`
+	Value         float64              `json:"value"`
 }
 
 func (a *attestationAnalysis) MarshalJSON() ([]byte, error) {
@@ -82,26 +83,26 @@ func (c *command) outputTxt(_ context.Context) (string, error) {
 	for i, attestation := range c.analysis.Attestations {
 		if c.verbose {
 			builder.WriteString("Attestation ")
-			builder.WriteString(fmt.Sprintf("%d", i))
+			builder.WriteString(strconv.Itoa(i))
 			builder.WriteString(": ")
 			builder.WriteString("distance ")
-			builder.WriteString(fmt.Sprintf("%d", attestation.Distance))
+			builder.WriteString(strconv.Itoa(attestation.Distance))
 			builder.WriteString(", ")
 
 			if attestation.Duplicate != nil {
 				builder.WriteString("duplicate of attestation ")
-				builder.WriteString(fmt.Sprintf("%d", attestation.Duplicate.Index))
+				builder.WriteString(strconv.Itoa(attestation.Duplicate.Index))
 				builder.WriteString(" in block ")
 				builder.WriteString(fmt.Sprintf("%d", attestation.Duplicate.Block))
 				builder.WriteString("\n")
 				continue
 			}
 
-			builder.WriteString(fmt.Sprintf("%d", attestation.NewVotes))
+			builder.WriteString(strconv.Itoa(attestation.NewVotes))
 			builder.WriteString("/")
-			builder.WriteString(fmt.Sprintf("%d", attestation.Votes))
+			builder.WriteString(strconv.Itoa(attestation.Votes))
 			builder.WriteString("/")
-			builder.WriteString(fmt.Sprintf("%d", attestation.PossibleVotes))
+			builder.WriteString(strconv.Itoa(attestation.PossibleVotes))
 			builder.WriteString(" new/total/possible votes")
 			if attestation.NewVotes == 0 {
 				builder.WriteString("\n")
@@ -137,7 +138,7 @@ func (c *command) outputTxt(_ context.Context) (string, error) {
 	if c.analysis.SyncCommitee.Contributions > 0 {
 		if c.verbose {
 			builder.WriteString("Sync committee contributions: ")
-			builder.WriteString(fmt.Sprintf("%d", c.analysis.SyncCommitee.Contributions))
+			builder.WriteString(strconv.Itoa(c.analysis.SyncCommitee.Contributions))
 			builder.WriteString(" contributions, score ")
 			builder.WriteString(fmt.Sprintf("%0.3f", c.analysis.SyncCommitee.Score))
 			builder.WriteString(", value ")

cmd/block/analyze/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 2023 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
@@ -17,8 +17,10 @@ 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/phase0"
 	"github.com/pkg/errors"
@@ -33,13 +35,17 @@ func (c *command) process(ctx context.Context) error {
 		return err
 	}
 
-	block, err := c.blocksProvider.SignedBeaconBlock(ctx, c.blockID)
+	blockResponse, err := c.blocksProvider.SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+		Block: c.blockID,
+	})
 	if err != nil {
+		var apiError *api.Error
+		if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+			return errors.New("empty beacon block")
+		}
 		return errors.Wrap(err, "failed to obtain beacon block")
 	}
-	if block == nil {
-		return errors.New("empty beacon block")
-	}
+	block := blockResponse.Data
 
 	slot, err := block.Slot()
 	if err != nil {
@@ -57,8 +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 {
+			return errors.Wrap(err, "failed to obtain attestation data")
+		}
+		if attestationData.Slot < minSlot {
+			minSlot = attestationData.Slot
 		}
 	}
 	if c.debug {
@@ -97,10 +107,16 @@ func (c *command) analyzeAttestations(ctx context.Context, block *spec.Versioned
 		if c.debug {
 			fmt.Printf("Processing attestation %d\n", i)
 		}
+
+		attestationData, err := attestation.Data()
+		if err != nil {
+			return errors.Wrap(err, "failed to obtain attestation data")
+		}
+
 		analysis := &attestationAnalysis{
-			Head:     attestation.Data.BeaconBlockRoot,
-			Target:   attestation.Data.Target.Root,
-			Distance: int(slot - attestation.Data.Slot),
+			Head:     attestationData.BeaconBlockRoot,
+			Target:   attestationData.Target.Root,
+			Distance: int(slot - attestationData.Slot),
 		}
 
 		root, err := attestation.HashTreeRoot()
@@ -110,45 +126,47 @@ func (c *command) analyzeAttestations(ctx context.Context, block *spec.Versioned
 		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)
+			aggregationBits, err := attestation.AggregationBits()
+			if err != nil {
+				return err
 			}
-			_, exists = blockVotes[data.Slot][data.Index]
+			_, exists := blockVotes[attestationData.Slot]
 			if !exists {
-				blockVotes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
+				blockVotes[attestationData.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+			}
+			_, exists = blockVotes[attestationData.Slot][attestationData.Index]
+			if !exists {
+				blockVotes[attestationData.Slot][attestationData.Index] = bitfield.NewBitlist(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.PossibleVotes = int(aggregationBits.Len())
+			for j := range aggregationBits.Len() {
+				if aggregationBits.BitAt(j) {
 					analysis.Votes++
-					if blockVotes[data.Slot][data.Index].BitAt(j) {
+					if blockVotes[attestationData.Slot][attestationData.Index].BitAt(j) {
 						// Already attested to in this block; skip.
 						continue
 					}
-					if c.votes[data.Slot][data.Index].BitAt(j) {
+					if c.votes[attestationData.Slot][attestationData.Index].BitAt(j) {
 						// Already attested to in a previous block; skip.
 						continue
 					}
 					analysis.NewVotes++
-					blockVotes[data.Slot][data.Index].SetBitAt(j, true)
+					blockVotes[attestationData.Slot][attestationData.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 = attestation.Data.Slot == slot-1
+			analysis.HeadTimely = analysis.HeadCorrect && attestationData.Slot == slot-1
 
 			// Calculate source timely.
-			analysis.SourceTimely = attestation.Data.Slot >= slot-5
+			analysis.SourceTimely = attestationData.Slot >= slot-5
 
 			// Calculate target correct.
 			analysis.TargetCorrect, err = c.calcTargetCorrect(ctx, attestation)
@@ -157,7 +175,11 @@ func (c *command) analyzeAttestations(ctx context.Context, block *spec.Versioned
 			}
 
 			// Calculate target timely.
-			analysis.TargetTimely = attestation.Data.Slot >= slot-32
+			if block.Version < spec.DataVersionDeneb {
+				analysis.TargetTimely = attestationData.Slot >= slot-32
+			} else {
+				analysis.TargetTimely = true
+			}
 		}
 
 		// Calculate score and value.
@@ -184,12 +206,30 @@ func (c *command) fetchParents(ctx context.Context, block *spec.VersionedSignedB
 	if err != nil {
 		return err
 	}
+	root, err := block.Root()
+	if err != nil {
+		panic(err)
+	}
+	slot, err := block.Slot()
+	if err != nil {
+		panic(err)
+	}
+	if c.debug {
+		fmt.Printf("Parent root of %#x@%d is %#x\n", root, slot, parentRoot)
+	}
 
 	// Obtain the parent block.
-	parentBlock, err := c.blocksProvider.SignedBeaconBlock(ctx, fmt.Sprintf("%#x", parentRoot))
+	parentBlockResponse, err := c.blocksProvider.SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+		Block: fmt.Sprintf("%#x", parentRoot),
+	})
 	if err != nil {
+		var apiError *api.Error
+		if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+			return errors.New("empty beacon block")
+		}
 		return err
 	}
+	parentBlock := parentBlockResponse.Data
 	if parentBlock == nil {
 		return fmt.Errorf("unable to obtain parent block %s", parentBlock)
 	}
@@ -227,23 +267,31 @@ func (c *command) processParentBlock(_ context.Context, block *spec.VersionedSig
 		if err != nil {
 			return err
 		}
-		c.priorAttestations[fmt.Sprintf("%#x", root)] = &attestationData{
+		c.priorAttestations[fmt.Sprintf("%#x", root)] = &attestationDataInfo{
 			Block: slot,
 			Index: i,
 		}
 
-		data := attestation.Data
-		_, exists := c.votes[data.Slot]
-		if !exists {
-			c.votes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+		attestationData, err := attestation.Data()
+		if err != nil {
+			return errors.Wrap(err, "failed to obtain attestation data")
 		}
-		_, exists = c.votes[data.Slot][data.Index]
-		if !exists {
-			c.votes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
+		aggregationBits, err := attestation.AggregationBits()
+		if err != nil {
+			return errors.Wrap(err, "failed to obtain attestation aggregation bits")
 		}
-		for j := uint64(0); j < attestation.AggregationBits.Len(); j++ {
-			if attestation.AggregationBits.BitAt(j) {
-				c.votes[data.Slot][data.Index].SetBitAt(j, true)
+
+		_, exists := c.votes[attestationData.Slot]
+		if !exists {
+			c.votes[attestationData.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+		}
+		_, exists = c.votes[attestationData.Slot][attestationData.Index]
+		if !exists {
+			c.votes[attestationData.Slot][attestationData.Index] = bitfield.NewBitlist(aggregationBits.Len())
+		}
+		for j := range aggregationBits.Len() {
+			if aggregationBits.BitAt(j) {
+				c.votes[attestationData.Slot][attestationData.Index].SetBitAt(j, true)
 			}
 		}
 	}
@@ -267,7 +315,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	c.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return errors.Wrap(err, "failed to set up chaintime service")
@@ -289,12 +337,12 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("connection does not provide spec information")
 	}
 
-	spec, err := specProvider.Spec(ctx)
+	specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain spec")
 	}
 
-	tmp, exists := spec["TIMELY_SOURCE_WEIGHT"]
+	tmp, exists := specResponse.Data["TIMELY_SOURCE_WEIGHT"]
 	if !exists {
 		// Set a default value based on the Altair spec.
 		tmp = uint64(14)
@@ -305,7 +353,7 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("TIMELY_SOURCE_WEIGHT of unexpected type")
 	}
 
-	tmp, exists = spec["TIMELY_TARGET_WEIGHT"]
+	tmp, exists = specResponse.Data["TIMELY_TARGET_WEIGHT"]
 	if !exists {
 		// Set a default value based on the Altair spec.
 		tmp = uint64(26)
@@ -315,7 +363,7 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("TIMELY_TARGET_WEIGHT of unexpected type")
 	}
 
-	tmp, exists = spec["TIMELY_HEAD_WEIGHT"]
+	tmp, exists = specResponse.Data["TIMELY_HEAD_WEIGHT"]
 	if !exists {
 		// Set a default value based on the Altair spec.
 		tmp = uint64(14)
@@ -325,7 +373,7 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("TIMELY_HEAD_WEIGHT of unexpected type")
 	}
 
-	tmp, exists = spec["SYNC_REWARD_WEIGHT"]
+	tmp, exists = specResponse.Data["SYNC_REWARD_WEIGHT"]
 	if !exists {
 		// Set a default value based on the Altair spec.
 		tmp = uint64(2)
@@ -335,7 +383,7 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("SYNC_REWARD_WEIGHT of unexpected type")
 	}
 
-	tmp, exists = spec["PROPOSER_WEIGHT"]
+	tmp, exists = specResponse.Data["PROPOSER_WEIGHT"]
 	if !exists {
 		// Set a default value based on the Altair spec.
 		tmp = uint64(8)
@@ -345,7 +393,7 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("PROPOSER_WEIGHT of unexpected type")
 	}
 
-	tmp, exists = spec["WEIGHT_DENOMINATOR"]
+	tmp, exists = specResponse.Data["WEIGHT_DENOMINATOR"]
 	if !exists {
 		// Set a default value based on the Altair spec.
 		tmp = uint64(64)
@@ -357,60 +405,87 @@ func (c *command) setup(ctx context.Context) error {
 	return nil
 }
 
-func (c *command) calcHeadCorrect(ctx context.Context, attestation *phase0.Attestation) (bool, error) {
-	slot := attestation.Data.Slot
+func (c *command) calcHeadCorrect(ctx context.Context, attestation *spec.VersionedAttestation) (bool, error) {
+	attestationData, err := attestation.Data()
+	if err != nil {
+		return false, errors.Wrap(err, "failed to obtain attestation data")
+	}
+
+	slot := attestationData.Slot
 	root, exists := c.headRoots[slot]
 	if !exists {
 		for {
-			header, err := c.blockHeadersProvider.BeaconBlockHeader(ctx, fmt.Sprintf("%d", slot))
+			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 == http.StatusNotFound {
+					if c.debug {
+						fmt.Printf("No block available for slot %d, assuming not in canonical chain", slot)
+					}
+					return false, nil
+				}
 				return false, err
 			}
-			if header == nil {
+			if response.Data == nil {
 				// No block.
 				slot--
 				continue
 			}
-			if !header.Canonical {
+			if !response.Data.Canonical {
 				// Not canonical.
 				slot--
 				continue
 			}
-			c.headRoots[attestation.Data.Slot] = header.Root
-			root = header.Root
+			c.headRoots[slot] = response.Data.Root
+			root = response.Data.Root
 			break
 		}
 	}
 
-	return bytes.Equal(root[:], attestation.Data.BeaconBlockRoot[:]), nil
+	return bytes.Equal(root[:], attestationData.BeaconBlockRoot[:]), nil
 }
 
-func (c *command) calcTargetCorrect(ctx context.Context, attestation *phase0.Attestation) (bool, error) {
-	root, exists := c.targetRoots[attestation.Data.Slot]
+func (c *command) calcTargetCorrect(ctx context.Context, attestation *spec.VersionedAttestation) (bool, error) {
+	attestationData, err := attestation.Data()
+	if err != nil {
+		return false, errors.Wrap(err, "failed to obtain attestation data")
+	}
+
+	root, exists := c.targetRoots[attestationData.Slot]
 	if !exists {
 		// Start with first slot of the target epoch.
-		slot := c.chainTime.FirstSlotOfEpoch(attestation.Data.Target.Epoch)
+		slot := c.chainTime.FirstSlotOfEpoch(attestationData.Target.Epoch)
 		for {
-			header, err := c.blockHeadersProvider.BeaconBlockHeader(ctx, fmt.Sprintf("%d", slot))
+			response, err := c.blockHeadersProvider.BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{
+				Block: fmt.Sprintf("%d", slot),
+			})
 			if err != nil {
-				return false, err
+				var apiError *api.Error
+				if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+					if c.debug {
+						fmt.Printf("No block available for slot %d, assuming not in canonical chain", slot)
+					}
+					return false, nil
+				}
 			}
-			if header == nil {
+			if response.Data == nil {
 				// No block.
 				slot--
 				continue
 			}
-			if !header.Canonical {
+			if !response.Data.Canonical {
 				// Not canonical.
 				slot--
 				continue
 			}
-			c.targetRoots[attestation.Data.Slot] = header.Root
-			root = header.Root
+			c.targetRoots[attestationData.Slot] = response.Data.Root
+			root = response.Data.Root
 			break
 		}
 	}
-	return bytes.Equal(root[:], attestation.Data.Target.Root[:]), nil
+	return bytes.Equal(root[:], attestationData.Target.Root[:]), nil
 }
 
 func (c *command) analyzeSyncCommittees(_ context.Context, block *spec.VersionedSignedBeaconBlock) error {
@@ -439,6 +514,27 @@ func (c *command) analyzeSyncCommittees(_ context.Context, block *spec.Versioned
 		c.analysis.SyncCommitee.Value = c.analysis.SyncCommitee.Score * float64(c.analysis.SyncCommitee.Contributions)
 		c.analysis.Value += c.analysis.SyncCommitee.Value
 		return nil
+	case spec.DataVersionDeneb:
+		c.analysis.SyncCommitee.Contributions = int(block.Deneb.Message.Body.SyncAggregate.SyncCommitteeBits.Count())
+		c.analysis.SyncCommitee.PossibleContributions = int(block.Deneb.Message.Body.SyncAggregate.SyncCommitteeBits.Len())
+		c.analysis.SyncCommitee.Score = float64(c.syncRewardWeight) / float64(c.weightDenominator)
+		c.analysis.SyncCommitee.Value = c.analysis.SyncCommitee.Score * float64(c.analysis.SyncCommitee.Contributions)
+		c.analysis.Value += c.analysis.SyncCommitee.Value
+		return nil
+	case spec.DataVersionElectra:
+		c.analysis.SyncCommitee.Contributions = int(block.Electra.Message.Body.SyncAggregate.SyncCommitteeBits.Count())
+		c.analysis.SyncCommitee.PossibleContributions = int(block.Electra.Message.Body.SyncAggregate.SyncCommitteeBits.Len())
+		c.analysis.SyncCommitee.Score = float64(c.syncRewardWeight) / float64(c.weightDenominator)
+		c.analysis.SyncCommitee.Value = c.analysis.SyncCommitee.Score * float64(c.analysis.SyncCommitee.Contributions)
+		c.analysis.Value += c.analysis.SyncCommitee.Value
+		return nil
+	case spec.DataVersionFulu:
+		c.analysis.SyncCommitee.Contributions = int(block.Fulu.Message.Body.SyncAggregate.SyncCommitteeBits.Count())
+		c.analysis.SyncCommitee.PossibleContributions = int(block.Fulu.Message.Body.SyncAggregate.SyncCommitteeBits.Len())
+		c.analysis.SyncCommitee.Score = float64(c.syncRewardWeight) / float64(c.weightDenominator)
+		c.analysis.SyncCommitee.Value = c.analysis.SyncCommitee.Score * float64(c.analysis.SyncCommitee.Contributions)
+		c.analysis.Value += c.analysis.SyncCommitee.Value
+		return nil
 	default:
 		return fmt.Errorf("unsupported block version %d", block.Version)
 	}

cmd/block/analyze/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 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
@@ -15,8 +15,8 @@ package blockanalyze
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -27,14 +27,19 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	c, err := newCommand(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to set up command")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := c.process(ctx); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := c.output(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/block/info/input.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019 - 2023 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
@@ -34,8 +34,9 @@ type dataIn struct {
 	jsonOutput bool
 	sszOutput  bool
 	// Chain information.
-	blockID string
-	stream  bool
+	blockID   string
+	blockTime string
+	stream    bool
 }
 
 func input(ctx context.Context) (*dataIn, error) {
@@ -50,7 +51,8 @@ func input(ctx context.Context) (*dataIn, error) {
 	data.debug = viper.GetBool("debug")
 	data.jsonOutput = viper.GetBool("json")
 	data.sszOutput = viper.GetBool("ssz")
-
+	data.blockID = viper.GetString("blockid")
+	data.blockTime = viper.GetString("block-time")
 	data.stream = viper.GetBool("stream")
 
 	var err error
@@ -64,12 +66,5 @@ func input(ctx context.Context) (*dataIn, error) {
 		return nil, err
 	}
 
-	if viper.GetString("blockid") == "" {
-		data.blockID = "head"
-	} else {
-		// Specific slot.
-		data.blockID = viper.GetString("blockid")
-	}
-
 	return data, nil
 }

cmd/block/info/output.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020, 2021 Weald Technology Trading
+// Copyright © 2019 - 2023 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
@@ -19,15 +19,20 @@ import (
 	"encoding/hex"
 	"fmt"
 	"math/big"
+	"regexp"
 	"sort"
+	"strconv"
 	"strings"
 	"time"
 	"unicode/utf8"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	"github.com/attestantio/go-eth2-client/spec/altair"
 	"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"
@@ -51,9 +56,10 @@ func output(_ context.Context, data *dataOut) (string, error) {
 	return "", nil
 }
 
-func outputBlockGeneral(_ context.Context,
+func outputBlockGeneral(ctx context.Context,
 	verbose bool,
 	slot phase0.Slot,
+	proposerIndex phase0.ValidatorIndex,
 	blockRoot phase0.Root,
 	bodyRoot phase0.Root,
 	parentRoot phase0.Root,
@@ -69,22 +75,16 @@ func outputBlockGeneral(_ context.Context,
 	res := strings.Builder{}
 
 	res.WriteString(fmt.Sprintf("Slot: %d\n", slot))
+	res.WriteString(fmt.Sprintf("Proposing validator index: %d\n", proposerIndex))
 	res.WriteString(fmt.Sprintf("Epoch: %d\n", phase0.Epoch(uint64(slot)/slotsPerEpoch)))
 	res.WriteString(fmt.Sprintf("Timestamp: %v\n", time.Unix(genesisTime.Unix()+int64(slot)*int64(slotDuration.Seconds()), 0)))
 	res.WriteString(fmt.Sprintf("Block root: %#x\n", blockRoot))
+	res.WriteString(fmt.Sprintf("Parent root: %#x\n", parentRoot))
 	if verbose {
 		res.WriteString(fmt.Sprintf("Body root: %#x\n", bodyRoot))
-		res.WriteString(fmt.Sprintf("Parent root: %#x\n", parentRoot))
 		res.WriteString(fmt.Sprintf("State root: %#x\n", stateRoot))
 	}
-	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))
-		}
-	}
+	res.WriteString(blockGraffiti(ctx, graffiti))
 
 	return res.String(), nil
 }
@@ -113,12 +113,14 @@ func outputBlockAttestations(ctx context.Context, eth2Client eth2client.Service,
 				// Fetch committees for this epoch if not already obtained.
 				committees, exists := validatorCommittees[att.Data.Slot]
 				if !exists {
-					beaconCommittees, err := beaconCommitteesProvider.BeaconCommittees(ctx, fmt.Sprintf("%d", att.Data.Slot))
+					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 beaconCommittees {
+						for _, beaconCommittee := range response.Data {
 							if _, exists := validatorCommittees[beaconCommittee.Slot]; !exists {
 								validatorCommittees[beaconCommittee.Slot] = make(map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
 							}
@@ -132,7 +134,61 @@ func outputBlockAttestations(ctx context.Context, eth2Client eth2client.Service,
 				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("    Attesting indices: %s\n", attestingIndices(att.AggregationBits, committees, []int{int(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 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]
+				}
+
+				committeeIndices := make([]phase0.CommitteeIndex, 0)
+				for _, committeeIndex := range att.CommitteeBits.BitIndices() {
+					committeeIndices = append(committeeIndices, phase0.CommitteeIndex(committeeIndex))
+				}
+				res.WriteString(fmt.Sprintf("    Committee indices: %d\n", committeeIndices))
+				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.CommitteeBits.BitIndices())))
 				}
 				res.WriteString(fmt.Sprintf("    Slot: %d\n", att.Data.Slot))
 				res.WriteString(fmt.Sprintf("    Beacon block root: %#x\n", att.Data.BeaconBlockRoot))
@@ -163,11 +219,64 @@ func outputBlockAttesterSlashings(ctx context.Context, eth2Client eth2client.Ser
 
 			res.WriteString(fmt.Sprintf("  %d:\n", i))
 			res.WriteString(fmt.Sprintln("    Slashed validators:"))
-			validators, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, "head", slashedIndices)
+			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 validators {
+			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 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))
 			}
 
@@ -220,11 +329,14 @@ func outputBlockVoluntaryExits(ctx context.Context, eth2Client eth2client.Servic
 	if verbose {
 		for i, voluntaryExit := range voluntaryExits {
 			res.WriteString(fmt.Sprintf("  %d:\n", i))
-			validators, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, "head", []phase0.ValidatorIndex{voluntaryExit.Message.ValidatorIndex})
+			response, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, &api.ValidatorsOpts{
+				State:   "head",
+				Indices: []phase0.ValidatorIndex{voluntaryExit.Message.ValidatorIndex},
+			})
 			if err != nil {
 				res.WriteString(fmt.Sprintf("  Error: failed to obtain validators: %v\n", err))
 			} else {
-				res.WriteString(fmt.Sprintf("    Validator: %#x (%d)\n", validators[voluntaryExit.Message.ValidatorIndex].Validator.PublicKey, voluntaryExit.Message.ValidatorIndex))
+				res.WriteString(fmt.Sprintf("    Validator: %#x (%d)\n", response.Data[voluntaryExit.Message.ValidatorIndex].Validator.PublicKey, voluntaryExit.Message.ValidatorIndex))
 				res.WriteString(fmt.Sprintf("    Epoch: %d\n", voluntaryExit.Message.Epoch))
 			}
 		}
@@ -240,13 +352,16 @@ func outputBlockBLSToExecutionChanges(ctx context.Context, eth2Client eth2client
 	if verbose {
 		for i, op := range ops {
 			res.WriteString(fmt.Sprintf("  %d:\n", i))
-			validators, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, "head", []phase0.ValidatorIndex{op.Message.ValidatorIndex})
+			response, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, &api.ValidatorsOpts{
+				State:   "head",
+				Indices: []phase0.ValidatorIndex{op.Message.ValidatorIndex},
+			})
 			if err != nil {
 				res.WriteString(fmt.Sprintf("  Error: failed to obtain validators: %v\n", err))
 			} else {
-				res.WriteString(fmt.Sprintf("    Validator: %#x (%d)\n", validators[op.Message.ValidatorIndex].Validator.PublicKey, op.Message.ValidatorIndex))
+				res.WriteString(fmt.Sprintf("    Validator: %#x (%d)\n", response.Data[op.Message.ValidatorIndex].Validator.PublicKey, op.Message.ValidatorIndex))
 				res.WriteString(fmt.Sprintf("    BLS public key: %#x\n", op.Message.FromBLSPubkey))
-				res.WriteString(fmt.Sprintf("    Execution address: %#x\n", op.Message.ToExecutionAddress))
+				res.WriteString(fmt.Sprintf("    Execution address: %s\n", op.Message.ToExecutionAddress.String()))
 			}
 		}
 	}
@@ -262,9 +377,9 @@ func outputBlockSyncAggregate(ctx context.Context, eth2Client eth2client.Service
 	if verbose {
 		specProvider, isProvider := eth2Client.(eth2client.SpecProvider)
 		if isProvider {
-			config, err := specProvider.Spec(ctx)
+			specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
 			if err == nil {
-				slotsPerEpoch := config["SLOTS_PER_EPOCH"].(uint64)
+				slotsPerEpoch := specResponse.Data["SLOTS_PER_EPOCH"].(uint64)
 
 				res.WriteString("  Contributions: ")
 				res.WriteString(bitvectorToString(syncAggregate.SyncCommitteeBits))
@@ -272,14 +387,16 @@ func outputBlockSyncAggregate(ctx context.Context, eth2Client eth2client.Service
 
 				syncCommitteesProvider, isProvider := eth2Client.(eth2client.SyncCommitteesProvider)
 				if isProvider {
-					syncCommittee, err := syncCommitteesProvider.SyncCommittee(ctx, fmt.Sprintf("%d", uint64(epoch)*slotsPerEpoch))
+					syncCommitteeResponse, err := syncCommitteesProvider.SyncCommittee(ctx, &api.SyncCommitteeOpts{
+						State: strconv.FormatUint(uint64(epoch)*slotsPerEpoch, 10),
+					})
 					if err != nil {
 						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", syncCommittee.Validators[i]))
+								res.WriteString(fmt.Sprintf(" %d", syncCommitteeResponse.Data.Validators[i]))
 							}
 						}
 						res.WriteString("\n")
@@ -314,6 +431,7 @@ func outputCapellaBlockText(ctx context.Context, data *dataOut, signedBlock *cap
 	tmp, err := outputBlockGeneral(ctx,
 		data.verbose,
 		signedBlock.Message.Slot,
+		signedBlock.Message.ProposerIndex,
 		blockRoot,
 		bodyRoot,
 		signedBlock.Message.ParentRoot,
@@ -388,6 +506,226 @@ func outputCapellaBlockText(ctx context.Context, data *dataOut, signedBlock *cap
 	return res.String(), nil
 }
 
+func outputDenebBlockText(ctx context.Context,
+	data *dataOut,
+	signedBlock *deneb.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 = outputBlockAttestations(ctx, data.eth2Client, data.verbose, signedBlock.Message.Body.Attestations)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	// Attester slashings.
+	tmp, err = outputBlockAttesterSlashings(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 = outputDenebBlockExecutionPayload(ctx, data.verbose, signedBlock.Message.Body.ExecutionPayload)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	tmp, err = outputBlobInfo(ctx, data.verbose, signedBlock.Message.Body.BlobKZGCommitments, blobs)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	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.
+
+	// 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 = outputDenebBlockExecutionPayload(ctx, data.verbose, signedBlock.Message.Body.ExecutionPayload)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	tmp, err = outputElectraBlockExecutionRequests(ctx, data.verbose, signedBlock.Message.Body.ExecutionRequests)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	tmp, err = outputBlobInfo(ctx, data.verbose, signedBlock.Message.Body.BlobKZGCommitments, 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")
@@ -410,6 +748,7 @@ func outputBellatrixBlockText(ctx context.Context, data *dataOut, signedBlock *b
 	tmp, err := outputBlockGeneral(ctx,
 		data.verbose,
 		signedBlock.Message.Slot,
+		signedBlock.Message.ProposerIndex,
 		blockRoot,
 		bodyRoot,
 		signedBlock.Message.ParentRoot,
@@ -500,6 +839,7 @@ func outputAltairBlockText(ctx context.Context, data *dataOut, signedBlock *alta
 	tmp, err := outputBlockGeneral(ctx,
 		data.verbose,
 		signedBlock.Message.Slot,
+		signedBlock.Message.ProposerIndex,
 		blockRoot,
 		bodyRoot,
 		signedBlock.Message.ParentRoot,
@@ -583,6 +923,7 @@ func outputPhase0BlockText(ctx context.Context, data *dataOut, signedBlock *phas
 	tmp, err := outputBlockGeneral(ctx,
 		data.verbose,
 		signedBlock.Message.Slot,
+		signedBlock.Message.ProposerIndex,
 		blockRoot,
 		bodyRoot,
 		signedBlock.Message.ParentRoot,
@@ -665,7 +1006,7 @@ 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)
@@ -676,7 +1017,7 @@ func outputCapellaBlockExecutionPayload(_ context.Context,
 		res.WriteString("  Parent hash: ")
 		res.WriteString(fmt.Sprintf("%#x\n", payload.ParentHash))
 		res.WriteString("  Fee recipient: ")
-		res.WriteString(fmt.Sprintf("%#x\n", payload.FeeRecipient))
+		res.WriteString(payload.FeeRecipient.String())
 		res.WriteString("  Gas limit: ")
 		res.WriteString(fmt.Sprintf("%d\n", payload.GasLimit))
 		res.WriteString("  Gas used: ")
@@ -706,6 +1047,143 @@ func outputCapellaBlockExecutionPayload(_ context.Context,
 	return res.String(), nil
 }
 
+func outputDenebBlockExecutionPayload(_ context.Context,
+	verbose bool,
+	payload *deneb.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 outputElectraBlockExecutionRequests(_ context.Context,
+	verbose bool,
+	executionRequests *electra.ExecutionRequests,
+) (
+	string,
+	error,
+) {
+	if executionRequests == nil {
+		return "", nil
+	}
+
+	res := strings.Builder{}
+	res.WriteString("Deposit requests: ")
+	res.WriteString(fmt.Sprintf("%d\n", len(executionRequests.Deposits)))
+	if verbose {
+		for i, deposit := range executionRequests.Deposits {
+			res.WriteString(fmt.Sprintf("%3d:\n", i))
+			res.WriteString(fmt.Sprintf("    Public key: %#x\n", deposit.Pubkey))
+			res.WriteString(fmt.Sprintf("    Withdrawal credentials: %#x\n", deposit.WithdrawalCredentials))
+			res.WriteString(fmt.Sprintf("    Amount: %s\n", string2eth.GWeiToString(uint64(deposit.Amount), true)))
+		}
+	}
+	res.WriteString("Withdrawal requests: ")
+	res.WriteString(fmt.Sprintf("%d\n", len(executionRequests.Withdrawals)))
+	if verbose {
+		for i, withdrawal := range executionRequests.Withdrawals {
+			res.WriteString(fmt.Sprintf("%3d:\n", i))
+			res.WriteString(fmt.Sprintf("    Source address: %#x\n", withdrawal.SourceAddress))
+			res.WriteString(fmt.Sprintf("    Validator public key: %#x\n", withdrawal.ValidatorPubkey))
+			res.WriteString(fmt.Sprintf("    Amount: %s\n", string2eth.GWeiToString(uint64(withdrawal.Amount), true)))
+		}
+	}
+	res.WriteString("Consolidation requests: ")
+	res.WriteString(fmt.Sprintf("%d\n", len(executionRequests.Consolidations)))
+	if verbose {
+		for i, consolidation := range executionRequests.Consolidations {
+			res.WriteString(fmt.Sprintf("%3d:\n", i))
+			res.WriteString(fmt.Sprintf("    Source address: %#x\n", consolidation.SourceAddress))
+			res.WriteString(fmt.Sprintf("    Source public key: %#x\n", consolidation.SourcePubkey))
+			res.WriteString(fmt.Sprintf("    Target public key: %#x\n", consolidation.TargetPubkey))
+		}
+	}
+
+	return res.String(), nil
+}
+
+func outputBlobInfo(_ context.Context,
+	verbose bool,
+	commitments []deneb.KZGCommitment,
+	blobs []*deneb.BlobSidecar,
+) (
+	string,
+	error,
+) {
+	res := strings.Builder{}
+
+	if len(blobs) == 0 && len(commitments) > 0 {
+		res.WriteString(fmt.Sprintf("Blobs: %d (but no blobs obtained from the beacon node)\n", len(commitments)))
+	} else {
+		res.WriteString(fmt.Sprintf("Blobs: %d\n", len(blobs)))
+		if verbose {
+			for i, blob := range blobs {
+				res.WriteString(fmt.Sprintf("%3d:\n", i))
+				res.WriteString(fmt.Sprintf("    KZG proof: %s\n", blob.KZGProof.String()))
+				res.WriteString(fmt.Sprintf("    KZG commitment: %s\n", blob.KZGCommitment.String()))
+			}
+		}
+	}
+
+	return res.String(), nil
+}
+
 func outputBellatrixBlockExecutionPayload(_ context.Context,
 	verbose bool,
 	payload *bellatrix.ExecutionPayload,
@@ -733,7 +1211,7 @@ 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)
@@ -744,7 +1222,7 @@ func outputBellatrixBlockExecutionPayload(_ context.Context,
 		res.WriteString("  Parent hash: ")
 		res.WriteString(fmt.Sprintf("%#x\n", payload.ParentHash))
 		res.WriteString("  Fee recipient: ")
-		res.WriteString(fmt.Sprintf("%#x\n", payload.FeeRecipient))
+		res.WriteString(payload.FeeRecipient.String())
 		res.WriteString("  Gas limit: ")
 		res.WriteString(fmt.Sprintf("%d\n", payload.GasLimit))
 		res.WriteString("  Gas used: ")
@@ -796,7 +1274,7 @@ 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 {
@@ -813,7 +1291,7 @@ 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 {
@@ -826,13 +1304,118 @@ func bitvectorToString(input bitfield.Bitvector512) string {
 	return res.String()
 }
 
-func attestingIndices(input bitfield.Bitlist, indices []phase0.ValidatorIndex) string {
+func attestingIndices(input bitfield.Bitlist,
+	committees map[phase0.CommitteeIndex][]phase0.ValidatorIndex,
+	includedCommittees []int,
+) string {
 	bits := int(input.Len())
-	res := ""
-	for i := 0; i < bits; i++ {
+
+	// Build up the validator list from the included committees.
+	validatorIndices := make([]phase0.ValidatorIndex, 0)
+	for _, committeeIndex := range includedCommittees {
+		validatorIndices = append(validatorIndices, committees[phase0.CommitteeIndex(committeeIndex)]...)
+	}
+
+	res := strings.Builder{}
+
+	for i := range bits {
 		if input.BitAt(uint64(i)) {
-			res = fmt.Sprintf("%s%d ", res, indices[i])
+			// Work out the committee and offset given the index.
+			res.WriteString(fmt.Sprintf("%d ", validatorIndices[i]))
 		}
 	}
-	return strings.TrimSpace(res)
+
+	return strings.TrimSpace(res.String())
+}
+
+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()
 }

cmd/block/info/output_internal_test.go

@@ -175,3 +175,58 @@ 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)
+		})
+	}
+}

cmd/block/info/process.go

@@ -17,16 +17,24 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
-	api "github.com/attestantio/go-eth2-client/api/v1"
+	"github.com/attestantio/go-eth2-client/api"
+	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
 	"github.com/attestantio/go-eth2-client/spec"
 	"github.com/attestantio/go-eth2-client/spec/altair"
 	"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"
 )
 
 var (
@@ -39,8 +47,8 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	if data == nil {
 		return nil, errors.New("no data")
 	}
-	if data.blockID == "" {
-		return nil, errors.New("no block ID")
+	if data.blockID == "" && data.blockTime == "" {
+		return nil, errors.New("no block ID or block time")
 	}
 
 	results = &dataOut{
@@ -49,45 +57,47 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		eth2Client: data.eth2Client,
 	}
 
-	config, err := results.eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	err := populateResults(ctx, results)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to connect to obtain configuration information")
+		return nil, err
 	}
-	genesis, err := results.eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to connect to obtain genesis information")
-	}
-	results.genesisTime = genesis.GenesisTime
-	results.slotDuration = config["SECONDS_PER_SLOT"].(time.Duration)
-	results.slotsPerEpoch = config["SLOTS_PER_EPOCH"].(uint64)
 
-	signedBlock, err := results.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, data.blockID)
+	if data.blockTime != "" {
+		data.blockID, err = timeToBlockID(ctx, data.eth2Client, data.blockTime)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	block, err := obtainBlock(ctx, data, results)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to obtain beacon block")
+		return nil, err
 	}
-	if signedBlock == nil {
-		return nil, errors.New("empty beacon block")
+	if data.quiet {
+		os.Exit(0)
 	}
-	switch signedBlock.Version {
+
+	switch block.Version {
 	case spec.DataVersionPhase0:
-		if err := outputPhase0Block(ctx, data.jsonOutput, signedBlock.Phase0); err != nil {
-			return nil, errors.Wrap(err, "failed to output block")
-		}
+		err = outputPhase0Block(ctx, data.jsonOutput, block.Phase0)
 	case spec.DataVersionAltair:
-		if err := outputAltairBlock(ctx, data.jsonOutput, data.sszOutput, signedBlock.Altair); err != nil {
-			return nil, errors.Wrap(err, "failed to output block")
-		}
+		err = outputAltairBlock(ctx, data.jsonOutput, data.sszOutput, block.Altair)
 	case spec.DataVersionBellatrix:
-		if err := outputBellatrixBlock(ctx, data.jsonOutput, data.sszOutput, signedBlock.Bellatrix); err != nil {
-			return nil, errors.Wrap(err, "failed to output block")
-		}
+		err = outputBellatrixBlock(ctx, data.jsonOutput, data.sszOutput, block.Bellatrix)
 	case spec.DataVersionCapella:
-		if err := outputCapellaBlock(ctx, data.jsonOutput, data.sszOutput, signedBlock.Capella); err != nil {
-			return nil, errors.Wrap(err, "failed to output block")
-		}
+		err = outputCapellaBlock(ctx, data.jsonOutput, data.sszOutput, block.Capella)
+	case spec.DataVersionDeneb:
+		err = processDenebBlock(ctx, data, block)
+	case spec.DataVersionElectra:
+		err = processElectraBlock(ctx, data, block)
+	case spec.DataVersionFulu:
+		err = processFuluBlock(ctx, data, block)
 	default:
 		return nil, errors.New("unknown block version")
 	}
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to process block")
+	}
 
 	if data.stream {
 		jsonOutput = data.jsonOutput
@@ -95,7 +105,10 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		if !jsonOutput && !sszOutput {
 			fmt.Println("")
 		}
-		err := data.eth2Client.(eth2client.EventsProvider).Events(ctx, []string{"head"}, headEventHandler)
+		err := data.eth2Client.(eth2client.EventsProvider).Events(ctx, &api.EventsOpts{
+			Topics:      []string{"head"},
+			HeadHandler: headEventHandler,
+		})
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to start block stream")
 		}
@@ -105,61 +118,230 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	return &dataOut{}, nil
 }
 
-func headEventHandler(event *api.Event) {
-	// Only interested in head events.
-	if event.Topic != "head" {
-		return
+func populateResults(ctx context.Context, results *dataOut) error {
+	specResponse, err := results.eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
+	if err != nil {
+		return errors.Wrap(err, "failed to connect to obtain configuration information")
+	}
+	genesisResponse, err := results.eth2Client.(eth2client.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
+	if err != nil {
+		return errors.Wrap(err, "failed to connect to obtain genesis information")
+	}
+	genesis := genesisResponse.Data
+	results.genesisTime = genesis.GenesisTime
+	results.slotDuration = specResponse.Data["SECONDS_PER_SLOT"].(time.Duration)
+	results.slotsPerEpoch = specResponse.Data["SLOTS_PER_EPOCH"].(uint64)
+
+	return nil
+}
+
+func obtainBlock(ctx context.Context, data *dataIn, results *dataOut,
+) (
+	*spec.VersionedSignedBeaconBlock,
+	error,
+) {
+	blockResponse, err := results.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+		Block: data.blockID,
+	})
+	if err != nil {
+		var apiErr *api.Error
+		if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+			if data.quiet {
+				os.Exit(1)
+			}
+
+			return nil, errors.New("empty beacon block")
+		}
+
+		return nil, errors.Wrap(err, "failed to obtain beacon block")
 	}
 
-	blockID := fmt.Sprintf("%#x", event.Data.(*api.HeadEvent).Block[:])
-	signedBlock, err := results.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(context.Background(), blockID)
+	return blockResponse.Data, nil
+}
+
+func processDenebBlock(ctx context.Context,
+	data *dataIn,
+	block *spec.VersionedSignedBeaconBlock,
+) error {
+	var blobSidecars []*deneb.BlobSidecar
+	kzgCommitments, err := block.BlobKZGCommitments()
+	if err != nil {
+		return err
+	}
+	if len(kzgCommitments) > 0 {
+		blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: data.blockID,
+		})
+		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode != http.StatusNotFound {
+				return errors.Wrap(err, "failed to obtain blob sidecars")
+			}
+		} else {
+			blobSidecars = blobSidecarsResponse.Data
+		}
+	}
+	if err := outputDenebBlock(ctx, data.jsonOutput, data.sszOutput, block.Deneb, blobSidecars); err != nil {
+		return errors.Wrap(err, "failed to output block")
+	}
+
+	return nil
+}
+
+func processElectraBlock(ctx context.Context,
+	data *dataIn,
+	block *spec.VersionedSignedBeaconBlock,
+) error {
+	var blobSidecars []*deneb.BlobSidecar
+	kzgCommitments, err := block.BlobKZGCommitments()
+	if err != nil {
+		return err
+	}
+	if len(kzgCommitments) > 0 {
+		blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: data.blockID,
+		})
+		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode != http.StatusNotFound {
+				return errors.Wrap(err, "failed to obtain blob sidecars")
+			}
+		} else {
+			blobSidecars = blobSidecarsResponse.Data
+		}
+	}
+	if err := outputElectraBlock(ctx, data.jsonOutput, data.sszOutput, block.Electra, blobSidecars); err != nil {
+		return errors.Wrap(err, "failed to output block")
+	}
+
+	return nil
+}
+
+func processFuluBlock(ctx context.Context,
+	data *dataIn,
+	block *spec.VersionedSignedBeaconBlock,
+) error {
+	var blobSidecars []*deneb.BlobSidecar
+	kzgCommitments, err := block.BlobKZGCommitments()
+	if err != nil {
+		return err
+	}
+	if len(kzgCommitments) > 0 {
+		blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: data.blockID,
+		})
+		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode != http.StatusNotFound {
+				return errors.Wrap(err, "failed to obtain blob sidecars")
+			}
+		} else {
+			blobSidecars = blobSidecarsResponse.Data
+		}
+	}
+	if err := outputFuluBlock(ctx, data.jsonOutput, data.sszOutput, block.Fulu, blobSidecars); err != nil {
+		return errors.Wrap(err, "failed to output block")
+	}
+
+	return nil
+}
+
+func headEventHandler(ctx context.Context, headEvent *apiv1.HeadEvent) {
+	blockID := fmt.Sprintf("%#x", headEvent.Block[:])
+	blockResponse, err := results.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+		Block: blockID,
+	})
 	if err != nil {
 		if !jsonOutput && !sszOutput {
 			fmt.Printf("Failed to obtain block: %v\n", err)
 		}
 		return
 	}
-	if signedBlock == nil {
+	block := blockResponse.Data
+	if block == nil {
 		if !jsonOutput && !sszOutput {
 			fmt.Println("Empty beacon block")
 		}
 		return
 	}
-	switch signedBlock.Version {
+
+	switch block.Version {
 	case spec.DataVersionPhase0:
-		if err := outputPhase0Block(context.Background(), jsonOutput, signedBlock.Phase0); err != nil {
-			if !jsonOutput && !sszOutput {
-				fmt.Printf("Failed to output block: %v\n", err)
-			}
-			return
-		}
+		err = outputPhase0Block(ctx, jsonOutput, block.Phase0)
 	case spec.DataVersionAltair:
-		if err := outputAltairBlock(context.Background(), jsonOutput, sszOutput, signedBlock.Altair); err != nil {
-			if !jsonOutput && !sszOutput {
-				fmt.Printf("Failed to output block: %v\n", err)
-			}
-			return
-		}
+		err = outputAltairBlock(ctx, jsonOutput, sszOutput, block.Altair)
 	case spec.DataVersionBellatrix:
-		if err := outputBellatrixBlock(context.Background(), jsonOutput, sszOutput, signedBlock.Bellatrix); err != nil {
-			if !jsonOutput && !sszOutput {
-				fmt.Printf("Failed to output block: %v\n", err)
-			}
-			return
-		}
+		err = outputBellatrixBlock(ctx, jsonOutput, sszOutput, block.Bellatrix)
 	case spec.DataVersionCapella:
-		if err := outputCapellaBlock(context.Background(), jsonOutput, sszOutput, signedBlock.Capella); err != nil {
-			if !jsonOutput && !sszOutput {
-				fmt.Printf("Failed to output block: %v\n", err)
-			}
+		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
 		}
-	default:
-		if !jsonOutput && !sszOutput {
-			fmt.Printf("Unknown block version: %v\n", signedBlock.Version)
+		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)
+	case spec.DataVersionElectra:
+		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 = outputElectraBlock(context.Background(), jsonOutput, sszOutput, block.Electra, blobSidecars)
+	case spec.DataVersionFulu:
+		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 = outputFuluBlock(context.Background(), jsonOutput, sszOutput, block.Fulu, blobSidecars)
+	default:
+		err = errors.New("unknown block version")
+	}
+	if err != nil && !jsonOutput && !sszOutput {
+		fmt.Printf("Failed to output block: %v\n", err)
 		return
 	}
+
 	if !jsonOutput && !sszOutput {
 		fmt.Println("")
 	}
@@ -254,3 +436,128 @@ func outputCapellaBlock(ctx context.Context, jsonOutput bool, sszOutput bool, si
 	}
 	return nil
 }
+
+func outputDenebBlock(ctx context.Context,
+	jsonOutput bool,
+	sszOutput bool,
+	signedBlock *deneb.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 := outputDenebBlockText(ctx, results, signedBlock, blobs)
+		if err != nil {
+			return errors.Wrap(err, "failed to generate text")
+		}
+		fmt.Print(data)
+	}
+	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 outputFuluBlock(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
+
+	switch {
+	case strings.HasPrefix(input, "0x"):
+		// Hex string.
+		hexTime, err := strconv.ParseInt(strings.TrimPrefix(input, "0x"), 16, 64)
+		if err != nil {
+			return "", errors.Wrap(err, "failed to parse block time as hex string")
+		}
+		timestamp = time.Unix(hexTime, 0)
+	case !strings.Contains(input, ":"):
+		// No colon, assume decimal string.
+		decTime, err := strconv.ParseInt(input, 10, 64)
+		if err != nil {
+			return "", errors.Wrap(err, "failed to parse block time as decimal string")
+		}
+		timestamp = time.Unix(decTime, 0)
+	default:
+		dateTime, err := time.Parse("2006-01-02T15:04:05", input)
+		if err != nil {
+			return "", errors.Wrap(err, "failed to parse block time as datetime")
+		}
+		timestamp = dateTime
+	}
+
+	// Assume timestamp.
+	chainTime, err := standardchaintime.New(ctx,
+		standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
+		standardchaintime.WithGenesisProvider(eth2Client.(eth2client.GenesisProvider)),
+	)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to set up chaintime service")
+	}
+
+	return fmt.Sprintf("%d", chainTime.TimestampToSlot(timestamp)), nil
+}

cmd/block/info/run.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
@@ -15,8 +15,8 @@ package blockinfo
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/block/trail/command.go

@@ -0,0 +1,89 @@
+// Copyright © 2025 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
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package blocktrail
+
+import (
+	"context"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+	"github.com/wealdtech/ethdo/services/chaintime"
+)
+
+type command struct {
+	quiet   bool
+	verbose bool
+	debug   bool
+
+	// Beacon node connection.
+	timeout                  time.Duration
+	connection               string
+	allowInsecureConnections bool
+
+	// Operation.
+	blockID    string
+	jsonOutput bool
+	target     string
+	maxBlocks  int
+
+	// Data access.
+	consensusClient      eth2client.Service
+	chainTime            chaintime.Service
+	blocksProvider       eth2client.SignedBeaconBlockProvider
+	blockHeadersProvider eth2client.BeaconBlockHeadersProvider
+
+	// Processing.
+	justifiedCheckpoint *phase0.Checkpoint
+	finalizedCheckpoint *phase0.Checkpoint
+
+	// Results.
+	steps []*step
+	found bool
+}
+
+type step struct {
+	Slot       phase0.Slot `json:"slot"`
+	Root       phase0.Root `json:"root"`
+	ParentRoot phase0.Root `json:"parent_root"`
+	State      string      `json:"state,omitempty"`
+	// Not a slot, but we're using it to steal the JSON processing.
+	ExecutionBlock phase0.Slot   `json:"execution_block"`
+	ExecutionHash  phase0.Hash32 `json:"execution_hash"`
+}
+
+func newCommand(_ context.Context) (*command, error) {
+	c := &command{
+		timeout:                  viper.GetDuration("timeout"),
+		quiet:                    viper.GetBool("quiet"),
+		verbose:                  viper.GetBool("verbose"),
+		debug:                    viper.GetBool("debug"),
+		jsonOutput:               viper.GetBool("json"),
+		connection:               viper.GetString("connection"),
+		allowInsecureConnections: viper.GetBool("allow-insecure-connections"),
+		blockID:                  viper.GetString("blockid"),
+		target:                   viper.GetString("target"),
+		maxBlocks:                viper.GetInt("max-blocks"),
+		steps:                    make([]*step, 0),
+	}
+
+	// Timeout.
+	if c.timeout == 0 {
+		return nil, errors.New("timeout is required")
+	}
+
+	return c, nil
+}

cmd/block/trail/output.go

@@ -0,0 +1,74 @@
+// Copyright © 2025 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
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package blocktrail
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+func (c *command) output(ctx context.Context) (string, error) {
+	if c.quiet {
+		return "", nil
+	}
+
+	if c.jsonOutput {
+		return c.outputJSON(ctx)
+	}
+
+	return c.outputTxt(ctx)
+}
+
+type simpleOut struct {
+	Start *step `json:"start"`
+	End   *step `json:"end"`
+	Steps int   `json:"distance"`
+}
+
+func (c *command) outputJSON(_ context.Context) (string, error) {
+	var err error
+	var data []byte
+	if c.verbose {
+		data, err = json.Marshal(c.steps)
+	} else {
+		basic := &simpleOut{
+			Start: c.steps[0],
+			End:   c.steps[len(c.steps)-1],
+			Steps: len(c.steps) - 1,
+		}
+		data, err = json.Marshal(basic)
+	}
+
+	if err != nil {
+		return "", err
+	}
+	return string(data), nil
+}
+
+func (c *command) outputTxt(_ context.Context) (string, error) {
+	if !c.found {
+		return "Target not found", nil
+	}
+
+	builder := strings.Builder{}
+	builder.WriteString("Target '")
+	builder.WriteString(c.target)
+	builder.WriteString("' found at a distance of ")
+	builder.WriteString(fmt.Sprintf("%d", len(c.steps)-1))
+	builder.WriteString(" block(s)")
+
+	return builder.String(), nil
+}

cmd/block/trail/process.go

@@ -0,0 +1,182 @@
+// Copyright © 2025 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
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package blocktrail
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"os"
+	"strconv"
+	"strings"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
+	"github.com/wealdtech/ethdo/util"
+)
+
+func (c *command) process(ctx context.Context) error {
+	// Obtain information we need to process.
+	if err := c.setup(ctx); err != nil {
+		return err
+	}
+
+	untilRoot := phase0.Root{}
+	var untilBlock phase0.Slot
+	switch {
+	case strings.ToLower(c.target) == "justified", strings.ToLower(c.target) == "finalized":
+		// Nothing to do.
+	case strings.HasPrefix(c.target, "0x"):
+		// Assume a root.
+		if err := json.Unmarshal([]byte(fmt.Sprintf("%q", c.target)), &untilRoot); err != nil {
+			return err
+		}
+	default:
+		// Assume a block number.
+		tmp, err := strconv.ParseUint(c.target, 10, 64)
+		if err != nil {
+			return err
+		}
+		untilBlock = phase0.Slot(tmp)
+	}
+
+	blockID := c.blockID
+	for range c.maxBlocks {
+		step := &step{}
+
+		blockResponse, err := c.blocksProvider.SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+			Block: blockID,
+		})
+		if err != nil {
+			var apiError *api.Error
+			if errors.As(err, &apiError) && apiError.StatusCode == http.StatusNotFound {
+				return errors.New("empty beacon block")
+			}
+			return errors.Wrap(err, "failed to obtain beacon block")
+		}
+		block := blockResponse.Data
+
+		step.Slot, err = block.Slot()
+		if err != nil {
+			return err
+		}
+		step.Root, err = block.Root()
+		if err != nil {
+			return err
+		}
+		step.ParentRoot, err = block.ParentRoot()
+		if err != nil {
+			return err
+		}
+		executionBlock, err := block.ExecutionBlockNumber()
+		if err != nil {
+			return err
+		}
+		step.ExecutionBlock = phase0.Slot(executionBlock)
+		step.ExecutionHash, err = block.ExecutionBlockHash()
+		if err != nil {
+			return err
+		}
+
+		if c.debug {
+			data, err := json.Marshal(step)
+			if err == nil {
+				fmt.Fprintf(os.Stderr, "Step is %s\n", string(data))
+			}
+		}
+
+		c.steps = append(c.steps, step)
+
+		blockID = step.ParentRoot.String()
+
+		if c.target == "justified" && bytes.Equal(step.Root[:], c.justifiedCheckpoint.Root[:]) {
+			c.found = true
+			break
+		}
+		if c.target == "finalized" && bytes.Equal(step.Root[:], c.finalizedCheckpoint.Root[:]) {
+			c.found = true
+			break
+		}
+		if untilBlock > 0 && step.Slot == untilBlock {
+			c.found = true
+			break
+		}
+		if (!untilRoot.IsZero()) && bytes.Equal(step.Root[:], untilRoot[:]) {
+			c.found = true
+			break
+		}
+	}
+
+	return nil
+}
+
+func (c *command) setup(ctx context.Context) error {
+	var err error
+
+	// Connect to the client.
+	c.consensusClient, err = util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
+		Address:       c.connection,
+		Timeout:       c.timeout,
+		AllowInsecure: c.allowInsecureConnections,
+		LogFallback:   !c.quiet,
+	})
+	if err != nil {
+		return errors.Wrap(err, "failed to connect to beacon node")
+	}
+
+	c.chainTime, err = standardchaintime.New(ctx,
+		standardchaintime.WithSpecProvider(c.consensusClient.(eth2client.SpecProvider)),
+		standardchaintime.WithGenesisProvider(c.consensusClient.(eth2client.GenesisProvider)),
+	)
+	if err != nil {
+		return errors.Wrap(err, "failed to set up chaintime service")
+	}
+
+	var isProvider bool
+	c.blocksProvider, isProvider = c.consensusClient.(eth2client.SignedBeaconBlockProvider)
+	if !isProvider {
+		return errors.New("connection does not provide signed beacon block information")
+	}
+	c.blockHeadersProvider, isProvider = c.consensusClient.(eth2client.BeaconBlockHeadersProvider)
+	if !isProvider {
+		return errors.New("connection does not provide beacon block header information")
+	}
+
+	finalityProvider, isProvider := c.consensusClient.(eth2client.FinalityProvider)
+	if !isProvider {
+		return errors.New("connection does not provide finality information")
+	}
+	finalityResponse, err := finalityProvider.Finality(ctx, &api.FinalityOpts{
+		State: "head",
+	})
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain finality")
+	}
+	finality := finalityResponse.Data
+	c.justifiedCheckpoint = finality.Justified
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "Justified checkpoint is %d / %#x\n", c.justifiedCheckpoint.Epoch, c.justifiedCheckpoint.Root)
+	}
+	c.finalizedCheckpoint = finality.Finalized
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "Finalized checkpoint is %d / %#x\n", c.finalizedCheckpoint.Epoch, c.finalizedCheckpoint.Root)
+	}
+
+	return nil
+}

cmd/block/trail/process_internal_test.go

@@ -0,0 +1,63 @@
+// Copyright © 2025 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
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package blocktrail
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestProcess(t *testing.T) {
+	if os.Getenv("ETHDO_TEST_CONNECTION") == "" {
+		t.Skip("ETHDO_TEST_CONNECTION not configured; cannot run tests")
+	}
+
+	tests := []struct {
+		name string
+		vars map[string]interface{}
+		err  string
+	}{
+		{
+			name: "NoBlock",
+			vars: map[string]interface{}{
+				"timeout":    "60s",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+				"blockid":    "invalid",
+			},
+			err: "failed to obtain beacon block: failed to request signed beacon block: GET failed with status 400: {\"code\":400,\"message\":\"BAD_REQUEST: Unsupported endpoint version: v2\",\"stacktraces\":[]}",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			cmd, err := newCommand(context.Background())
+			require.NoError(t, err)
+			err = cmd.process(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

cmd/block/trail/run.go

@@ -0,0 +1,59 @@
+// Copyright © 2025 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
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package blocktrail
+
+import (
+	"context"
+	"errors"
+	"os"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// Run runs the command.
+func Run(cmd *cobra.Command) (string, error) {
+	ctx := context.Background()
+
+	c, err := newCommand(ctx)
+	if err != nil {
+		return "", errors.Join(errors.New("failed to set up command"), err)
+	}
+
+	// Further errors do not need a usage report.
+	cmd.SilenceUsage = true
+
+	if err := c.process(ctx); err != nil {
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
+	}
+
+	if viper.GetBool("quiet") {
+		if c.found {
+			return "", nil
+		}
+		os.Exit(1)
+	}
+
+	results, err := c.output(ctx)
+	if err != nil {
+		return "", errors.Join(errors.New("failed to obtain output"), err)
+	}
+
+	return results, nil
+}

cmd/blockanalyze.go

@@ -29,7 +29,7 @@ var blockAnalyzeCmd = &cobra.Command{
     ethdo block analyze --blockid=12345
 
 In quiet mode this will return 0 if the block information is present and not skipped, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := blockanalyze.Run(cmd)
 		if err != nil {
 			return err

cmd/blockinfo.go

@@ -29,7 +29,7 @@ var blockInfoCmd = &cobra.Command{
     ethdo block info --blockid=12345
 
 In quiet mode this will return 0 if the block information is present and not skipped, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := blockinfo.Run(cmd)
 		if err != nil {
 			return err
@@ -48,6 +48,7 @@ func init() {
 	blockCmd.AddCommand(blockInfoCmd)
 	blockFlags(blockInfoCmd)
 	blockInfoCmd.Flags().String("blockid", "head", "the ID of the block to fetch")
+	blockInfoCmd.Flags().String("block-time", "", "the time of the block to fetch (format YYYY-MM-DDTHH:MM:SS, or a hex or decimal timestamp")
 	blockInfoCmd.Flags().Bool("stream", false, "continually stream blocks as they arrive")
 	blockInfoCmd.Flags().Bool("ssz", false, "output data in SSZ format")
 }
@@ -56,6 +57,9 @@ func blockInfoBindings(cmd *cobra.Command) {
 	if err := viper.BindPFlag("blockid", cmd.Flags().Lookup("blockid")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("block-time", cmd.Flags().Lookup("block-time")); err != nil {
+		panic(err)
+	}
 	if err := viper.BindPFlag("stream", cmd.Flags().Lookup("stream")); err != nil {
 		panic(err)
 	}

cmd/blocktrail.go

@@ -0,0 +1,65 @@
+// Copyright © 2025 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
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	blocktrail "github.com/wealdtech/ethdo/cmd/block/trail"
+)
+
+var blockTrailCmd = &cobra.Command{
+	Use:   "trail",
+	Short: "Trail back in the chain from a given block.",
+	Long: `Trail back in the chain for a given block.  For example:
+
+    ethdo block trail --blockid=12345 --target=finalized
+
+In quiet mode this will return 0 if the block trail ends up at the finalized state, otherwise 1.`,
+	RunE: func(cmd *cobra.Command, _ []string) error {
+		res, err := blocktrail.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if viper.GetBool("quiet") {
+			return nil
+		}
+		if res != "" {
+			fmt.Println(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	blockCmd.AddCommand(blockTrailCmd)
+	blockFlags(blockTrailCmd)
+	blockTrailCmd.Flags().String("blockid", "head", "the ID of the block to fetch")
+	blockTrailCmd.Flags().String("target", "justified", "the target block (block number, hash, justified or finalized)")
+	blockTrailCmd.Flags().Int("max-blocks", 16384, "the maximum number of blocks to look at before halting")
+}
+
+func blockTrailBindings(cmd *cobra.Command) {
+	if err := viper.BindPFlag("blockid", cmd.Flags().Lookup("blockid")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("target", cmd.Flags().Lookup("target")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("max-blocks", cmd.Flags().Lookup("max-blocks")); err != nil {
+		panic(err)
+	}
+}

cmd/chain/eth1votes/command.go

@@ -50,6 +50,8 @@ type command struct {
 	slot          phase0.Slot
 	epoch         phase0.Epoch
 	period        uint64
+	periodStart   time.Time
+	periodEnd     time.Time
 	incumbent     *phase0.ETH1Data
 	eth1DataVotes []*phase0.ETH1Data
 	votes         map[string]*vote

cmd/chain/eth1votes/output.go

@@ -24,11 +24,13 @@ import (
 )
 
 type jsonOutput struct {
-	Period    uint64           `json:"period"`
-	Epoch     phase0.Epoch     `json:"epoch"`
-	Slot      phase0.Slot      `json:"slot"`
-	Incumbent *phase0.ETH1Data `json:"incumbent"`
-	Votes     []*vote          `json:"votes"`
+	Period      uint64           `json:"period"`
+	PeriodStart int64            `json:"period_start"`
+	PeriodEnd   int64            `json:"period_end"`
+	Epoch       phase0.Epoch     `json:"epoch"`
+	Slot        phase0.Slot      `json:"slot"`
+	Incumbent   *phase0.ETH1Data `json:"incumbent"`
+	Votes       []*vote          `json:"votes"`
 }
 
 func (c *command) output(ctx context.Context) (string, error) {
@@ -57,11 +59,13 @@ func (c *command) outputJSON(_ context.Context) (string, error) {
 	})
 
 	output := &jsonOutput{
-		Period:    c.period,
-		Epoch:     c.epoch,
-		Slot:      c.slot,
-		Incumbent: c.incumbent,
-		Votes:     votes,
+		Period:      c.period,
+		PeriodStart: c.periodStart.Unix(),
+		PeriodEnd:   c.periodEnd.Unix(),
+		Epoch:       c.epoch,
+		Slot:        c.slot,
+		Incumbent:   c.incumbent,
+		Votes:       votes,
 	}
 	data, err := json.Marshal(output)
 	if err != nil {
@@ -78,6 +82,11 @@ func (c *command) outputText(_ context.Context) (string, error) {
 	builder.WriteString(fmt.Sprintf("%d\n", c.period))
 
 	if c.verbose {
+		builder.WriteString("Period start: ")
+		builder.WriteString(fmt.Sprintf("%s\n", c.periodStart))
+		builder.WriteString("Period end: ")
+		builder.WriteString(fmt.Sprintf("%s\n", c.periodEnd))
+
 		builder.WriteString("Incumbent: ")
 		builder.WriteString(fmt.Sprintf("block %#x, deposit count %d\n", c.incumbent.BlockHash, c.incumbent.DepositCount))
 	}

cmd/chain/eth1votes/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 2023 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
@@ -20,6 +20,7 @@ import (
 	"strconv"
 
 	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/phase0"
 	"github.com/pkg/errors"
@@ -58,10 +59,13 @@ func (c *command) process(ctx context.Context) error {
 	if fetchSlot > c.chainTime.CurrentSlot() {
 		fetchSlot = c.chainTime.CurrentSlot()
 	}
-	state, err := c.beaconStateProvider.BeaconState(ctx, fmt.Sprintf("%d", fetchSlot))
+	stateResponse, err := c.beaconStateProvider.BeaconState(ctx, &api.BeaconStateOpts{
+		State: fmt.Sprintf("%d", fetchSlot),
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain state")
 	}
+	state := stateResponse.Data
 	if state == nil {
 		return errors.New("state not returned by beacon node")
 	}
@@ -73,28 +77,39 @@ func (c *command) process(ctx context.Context) error {
 		}
 	}
 
+	c.slot, err = state.Slot()
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain slot")
+	}
 	switch state.Version {
 	case spec.DataVersionPhase0:
-		c.slot = state.Phase0.Slot
 		c.incumbent = state.Phase0.ETH1Data
 		c.eth1DataVotes = state.Phase0.ETH1DataVotes
 	case spec.DataVersionAltair:
-		c.slot = state.Altair.Slot
 		c.incumbent = state.Altair.ETH1Data
 		c.eth1DataVotes = state.Altair.ETH1DataVotes
 	case spec.DataVersionBellatrix:
-		c.slot = state.Bellatrix.Slot
 		c.incumbent = state.Bellatrix.ETH1Data
 		c.eth1DataVotes = state.Bellatrix.ETH1DataVotes
 	case spec.DataVersionCapella:
-		c.slot = state.Capella.Slot
 		c.incumbent = state.Capella.ETH1Data
 		c.eth1DataVotes = state.Capella.ETH1DataVotes
+	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
+	case spec.DataVersionFulu:
+		c.incumbent = state.Fulu.ETH1Data
+		c.eth1DataVotes = state.Fulu.ETH1DataVotes
 	default:
 		return fmt.Errorf("unhandled beacon state version %v", state.Version)
 	}
 
 	c.period = uint64(c.epoch) / c.epochsPerEth1VotingPeriod
+	c.periodStart = c.chainTime.StartOfEpoch(phase0.Epoch(c.period * c.epochsPerEth1VotingPeriod))
+	c.periodEnd = c.chainTime.StartOfEpoch(phase0.Epoch((c.period + 1) * c.epochsPerEth1VotingPeriod))
 
 	c.votes = make(map[string]*vote)
 	for _, eth1Vote := range c.eth1DataVotes {
@@ -126,7 +141,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	c.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return errors.Wrap(err, "failed to set up chaintime service")
@@ -142,12 +157,12 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("connection does not provide spec information")
 	}
 
-	spec, err := specProvider.Spec(ctx)
+	specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain spec")
 	}
 
-	tmp, exists := spec["SLOTS_PER_EPOCH"]
+	tmp, exists := specResponse.Data["SLOTS_PER_EPOCH"]
 	if !exists {
 		return errors.New("spec did not contain SLOTS_PER_EPOCH")
 	}
@@ -156,7 +171,7 @@ func (c *command) setup(ctx context.Context) error {
 	if !good {
 		return errors.New("SLOTS_PER_EPOCH value invalid")
 	}
-	tmp, exists = spec["EPOCHS_PER_ETH1_VOTING_PERIOD"]
+	tmp, exists = specResponse.Data["EPOCHS_PER_ETH1_VOTING_PERIOD"]
 	if !exists {
 		return errors.New("spec did not contain EPOCHS_PER_ETH1_VOTING_PERIOD")
 	}

cmd/chain/eth1votes/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 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
@@ -15,8 +15,8 @@ package chaineth1votes
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -27,14 +27,19 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	c, err := newCommand(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to set up command")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := c.process(ctx); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := c.output(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/chain/queues/process.go

@@ -18,6 +18,7 @@ import (
 	"fmt"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	"github.com/pkg/errors"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
 	"github.com/wealdtech/ethdo/util"
@@ -34,12 +35,14 @@ func (c *command) process(ctx context.Context) error {
 		return err
 	}
 
-	validators, err := c.validatorsProvider.Validators(ctx, fmt.Sprintf("%d", c.chainTime.FirstSlotOfEpoch(epoch)), nil)
+	response, err := c.validatorsProvider.Validators(ctx, &api.ValidatorsOpts{
+		State: fmt.Sprintf("%d", c.chainTime.FirstSlotOfEpoch(epoch)),
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain validators")
 	}
 
-	for _, validator := range validators {
+	for _, validator := range response.Data {
 		if validator.Validator == nil {
 			continue
 		}
@@ -70,7 +73,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	c.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return errors.Wrap(err, "failed to set up chaintime service")

cmd/chain/queues/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 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
@@ -15,8 +15,8 @@ package chainqueues
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -27,14 +27,19 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	c, err := newCommand(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to set up command")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := c.process(ctx); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := c.output(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/chain/time/output.go

@@ -16,6 +16,7 @@ package chaintime
 import (
 	"context"
 	"fmt"
+	"strconv"
 	"strings"
 	"time"
 
@@ -59,14 +60,14 @@ func output(_ context.Context, data *dataOut) (string, error) {
 	builder.WriteString(data.epochStart.Format("2006-01-02 15:04:05"))
 	if data.verbose {
 		builder.WriteString(" (")
-		builder.WriteString(fmt.Sprintf("%d", data.epochStart.Unix()))
+		builder.WriteString(strconv.FormatInt(data.epochStart.Unix(), 10))
 		builder.WriteString(")")
 	}
 	builder.WriteString("\n  Epoch end ")
 	builder.WriteString(data.epochEnd.Format("2006-01-02 15:04:05"))
 	if data.verbose {
 		builder.WriteString(" (")
-		builder.WriteString(fmt.Sprintf("%d", data.epochEnd.Unix()))
+		builder.WriteString(strconv.FormatInt(data.epochEnd.Unix(), 10))
 		builder.WriteString(")")
 	}
 
@@ -76,27 +77,27 @@ func output(_ context.Context, data *dataOut) (string, error) {
 	builder.WriteString(data.slotStart.Format("2006-01-02 15:04:05"))
 	if data.verbose {
 		builder.WriteString(" (")
-		builder.WriteString(fmt.Sprintf("%d", data.slotStart.Unix()))
+		builder.WriteString(strconv.FormatInt(data.slotStart.Unix(), 10))
 		builder.WriteString(")")
 	}
 	builder.WriteString("\n  Slot end ")
 	builder.WriteString(data.slotEnd.Format("2006-01-02 15:04:05"))
 	if data.verbose {
 		builder.WriteString(" (")
-		builder.WriteString(fmt.Sprintf("%d", data.slotEnd.Unix()))
+		builder.WriteString(strconv.FormatInt(data.slotEnd.Unix(), 10))
 		builder.WriteString(")")
 	}
 
 	if data.hasSyncCommittees {
 		builder.WriteString("\nSync committee period ")
-		builder.WriteString(fmt.Sprintf("%d", data.syncCommitteePeriod))
+		builder.WriteString(strconv.FormatUint(data.syncCommitteePeriod, 10))
 		builder.WriteString("\n  Sync committee period start ")
 		builder.WriteString(data.syncCommitteePeriodStart.Format("2006-01-02 15:04:05"))
 		builder.WriteString(" (epoch ")
 		builder.WriteString(fmt.Sprintf("%d", data.syncCommitteePeriodEpochStart))
 		if data.verbose {
 			builder.WriteString(", ")
-			builder.WriteString(fmt.Sprintf("%d", data.syncCommitteePeriodStart.Unix()))
+			builder.WriteString(strconv.FormatInt(data.syncCommitteePeriodStart.Unix(), 10))
 		}
 		builder.WriteString(")\n  Sync committee period end ")
 		builder.WriteString(data.syncCommitteePeriodEnd.Format("2006-01-02 15:04:05"))
@@ -104,7 +105,7 @@ func output(_ context.Context, data *dataOut) (string, error) {
 		builder.WriteString(fmt.Sprintf("%d", data.syncCommitteePeriodEpochEnd))
 		if data.verbose {
 			builder.WriteString(", ")
-			builder.WriteString(fmt.Sprintf("%d", data.syncCommitteePeriodEnd.Unix()))
+			builder.WriteString(strconv.FormatInt(data.syncCommitteePeriodEnd.Unix(), 10))
 		}
 		builder.WriteString(")")
 	}

cmd/chain/time/process.go

@@ -42,7 +42,7 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 
 	chainTime, err := standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to set up chaintime service")

cmd/chain/time/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading
+// Copyright © 2021, 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
@@ -15,8 +15,8 @@ package chaintime
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/chain/verify/signedcontributionandproof/process.go

@@ -22,6 +22,7 @@ import (
 	"os"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	"github.com/attestantio/go-eth2-client/spec/altair"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
@@ -103,29 +104,32 @@ func (c *command) setup(ctx context.Context) error {
 	}
 
 	stateID := fmt.Sprintf("%d", c.item.Message.Contribution.Slot)
-	validators, err := c.validatorsProvider.Validators(ctx,
-		stateID,
-		[]phase0.ValidatorIndex{c.item.Message.AggregatorIndex},
-	)
+	response, err := c.validatorsProvider.Validators(ctx, &api.ValidatorsOpts{
+		State:   stateID,
+		Indices: []phase0.ValidatorIndex{c.item.Message.AggregatorIndex},
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain validator information")
 	}
 
-	if len(validators) == 0 || validators[c.item.Message.AggregatorIndex] == nil {
+	if len(response.Data) == 0 || response.Data[c.item.Message.AggregatorIndex] == nil {
 		return nil
 	}
 	c.validatorKnown = true
-	c.validator = validators[c.item.Message.AggregatorIndex]
+	c.validator = response.Data[c.item.Message.AggregatorIndex]
 
 	// Obtain the sync committee
 	syncCommitteesProvider, isProvider := c.eth2Client.(eth2client.SyncCommitteesProvider)
 	if !isProvider {
 		return errors.New("connection does not provide sync committee information")
 	}
-	c.syncCommittee, err = syncCommitteesProvider.SyncCommittee(ctx, stateID)
+	syncCommitteeResponse, err := syncCommitteesProvider.SyncCommittee(ctx, &api.SyncCommitteeOpts{
+		State: stateID,
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain sync committee information")
 	}
+	c.syncCommittee = syncCommitteeResponse.Data
 
 	return nil
 }
@@ -137,11 +141,11 @@ func (c *command) isAggregator(ctx context.Context) (bool, error) {
 	if !isProvider {
 		return false, errors.New("connection does not provide spec information")
 	}
-	var err error
-	c.spec, err = specProvider.Spec(ctx)
+	specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return false, errors.Wrap(err, "failed to obtain spec information")
 	}
+	c.spec = specResponse.Data
 
 	tmp, exists := c.spec["SYNC_COMMITTEE_SIZE"]
 	if !exists {
@@ -217,7 +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)])
 		}
@@ -226,16 +230,19 @@ func (c *command) confirmContributionSignature(ctx context.Context) error {
 		fmt.Fprintf(os.Stderr, "Contribution validator indices: %v (%d)\n", includedIndices, len(includedIndices))
 	}
 
-	includedValidators, err := c.validatorsProvider.Validators(ctx, "head", includedIndices)
+	response, err := c.validatorsProvider.Validators(ctx, &api.ValidatorsOpts{
+		State:   "head",
+		Indices: includedIndices,
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain subcommittee validators")
 	}
-	if len(includedValidators) == 0 {
+	if len(response.Data) == 0 {
 		return errors.New("obtained empty subcommittee validator list")
 	}
 
 	var aggregatePubKey *e2types.BLSPublicKey
-	for _, v := range includedValidators {
+	for _, v := range response.Data {
 		pubKeyBytes := make([]byte, 48)
 		copy(pubKeyBytes, v.Validator.PublicKey[:])
 		pubKey, err := e2types.BLSPublicKeyFromBytes(pubKeyBytes)

cmd/chain/verify/signedcontributionandproof/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading.
+// Copyright © 2021, 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
@@ -15,8 +15,8 @@ package chainverifysignedcontributionandproof
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -27,14 +27,19 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	c, err := newCommand(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to set up command")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := c.process(ctx); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := c.output(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/chaineth1votes.go

@@ -31,7 +31,7 @@ var chainEth1VotesCmd = &cobra.Command{
 Note that this will fetch the votes made in blocks up to the end of the provided epoch.
 
 In quiet mode this will return 0 if there is a majority for the votes, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := chaineth1votes.Run(cmd)
 		if err != nil {
 			return err

cmd/chaininfo.go

@@ -1,4 +1,4 @@
-// Copyright © 2020, 2022 Weald Technology Trading
+// Copyright © 2020 - 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
@@ -20,6 +20,8 @@ import (
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
+	"github.com/attestantio/go-eth2-client/spec/bellatrix"
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
@@ -34,7 +36,7 @@ var chainInfoCmd = &cobra.Command{
     ethdo chain info
 
 In quiet mode this will return 0 if the chain information can be obtained, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx := context.Background()
 
 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
@@ -45,32 +47,33 @@ In quiet mode this will return 0 if the chain information can be obtained, other
 		})
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")
 
-		config, err := eth2Client.(eth2client.SpecProvider).Spec(ctx)
+		specResponse, err := eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 		errCheck(err, "Failed to obtain beacon chain specification")
 
-		genesis, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
+		genesisResponse, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
 		errCheck(err, "Failed to obtain beacon chain genesis")
 
-		fork, err := eth2Client.(eth2client.ForkProvider).Fork(ctx, "head")
+		forkResponse, err := eth2Client.(eth2client.ForkProvider).Fork(ctx, &api.ForkOpts{State: "head"})
 		errCheck(err, "Failed to obtain current fork")
 
 		if viper.GetBool("quiet") {
 			os.Exit(_exitSuccess)
 		}
 
-		if genesis.GenesisTime.Unix() == 0 {
+		if genesisResponse.Data.GenesisTime.Unix() == 0 {
 			fmt.Println("Genesis time: undefined")
 		} else {
-			fmt.Printf("Genesis time: %s\n", genesis.GenesisTime.Format(time.UnixDate))
-			outputIf(viper.GetBool("verbose"), fmt.Sprintf("Genesis timestamp: %v", genesis.GenesisTime.Unix()))
+			fmt.Printf("Genesis time: %s\n", genesisResponse.Data.GenesisTime.Format(time.UnixDate))
+			outputIf(viper.GetBool("verbose"), fmt.Sprintf("Genesis timestamp: %v", genesisResponse.Data.GenesisTime.Unix()))
 		}
-		fmt.Printf("Genesis validators root: %#x\n", genesis.GenesisValidatorsRoot)
-		fmt.Printf("Genesis fork version: %#x\n", config["GENESIS_FORK_VERSION"].(spec.Version))
-		fmt.Printf("Current fork version: %#x\n", fork.CurrentVersion)
+
+		fmt.Printf("Genesis validators root: %#x\n", genesisResponse.Data.GenesisValidatorsRoot)
+		fmt.Printf("Genesis fork version: %#x\n", specResponse.Data["GENESIS_FORK_VERSION"].(spec.Version))
+		fmt.Printf("Current fork version: %#x\n", forkResponse.Data.CurrentVersion)
 		if viper.GetBool("verbose") {
 			forkData := &spec.ForkData{
-				CurrentVersion:        fork.CurrentVersion,
-				GenesisValidatorsRoot: genesis.GenesisValidatorsRoot,
+				CurrentVersion:        forkResponse.Data.CurrentVersion,
+				GenesisValidatorsRoot: genesisResponse.Data.GenesisValidatorsRoot,
 			}
 			forkDataRoot, err := forkData.HashTreeRoot()
 			if err == nil {
@@ -79,8 +82,12 @@ In quiet mode this will return 0 if the chain information can be obtained, other
 				fmt.Printf("Fork digest: %#x\n", forkDigest)
 			}
 		}
-		fmt.Printf("Seconds per slot: %d\n", int(config["SECONDS_PER_SLOT"].(time.Duration).Seconds()))
-		fmt.Printf("Slots per epoch: %d\n", config["SLOTS_PER_EPOCH"].(uint64))
+		fmt.Printf("Seconds per slot: %d\n", int(specResponse.Data["SECONDS_PER_SLOT"].(time.Duration).Seconds()))
+		fmt.Printf("Slots per epoch: %d\n", specResponse.Data["SLOTS_PER_EPOCH"].(uint64))
+
+		depositContractAddress := bellatrix.ExecutionAddress{}
+		copy(depositContractAddress[:], specResponse.Data["DEPOSIT_CONTRACT_ADDRESS"].([]byte))
+		fmt.Printf("Deposit contract address: %s\n", depositContractAddress.String())
 
 		os.Exit(_exitSuccess)
 	},

cmd/chainqueues.go

@@ -29,7 +29,7 @@ var chainQueuesCmd = &cobra.Command{
     ethdo chain queues
 
 In quiet mode this will return 0 if the entry and exit queues are 0, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := chainqueues.Run(cmd)
 		if err != nil {
 			return err

cmd/chainspec.go

@@ -18,9 +18,11 @@ import (
 	"encoding/json"
 	"fmt"
 	"sort"
+	"strconv"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
@@ -35,7 +37,7 @@ var chainSpecCmd = &cobra.Command{
     ethdo chain spec
 
 In quiet mode this will return 0 if the chain specification can be obtained, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx := context.Background()
 
 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
@@ -46,7 +48,7 @@ In quiet mode this will return 0 if the chain specification can be obtained, oth
 		})
 		errCheck(err, "Failed to connect to Ethereum consensus node")
 
-		spec, err := eth2Client.(eth2client.SpecProvider).Spec(ctx)
+		specResponse, err := eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 		errCheck(err, "Failed to obtain chain specification")
 
 		if viper.GetBool("quiet") {
@@ -54,35 +56,35 @@ In quiet mode this will return 0 if the chain specification can be obtained, oth
 		}
 
 		// Tweak the spec for output.
-		for k, v := range spec {
+		for k, v := range specResponse.Data {
 			switch t := v.(type) {
 			case phase0.Version:
-				spec[k] = fmt.Sprintf("%#x", t)
+				specResponse.Data[k] = fmt.Sprintf("%#x", t)
 			case phase0.DomainType:
-				spec[k] = fmt.Sprintf("%#x", t)
+				specResponse.Data[k] = fmt.Sprintf("%#x", t)
 			case time.Time:
-				spec[k] = fmt.Sprintf("%d", t.Unix())
+				specResponse.Data[k] = strconv.FormatInt(t.Unix(), 10)
 			case time.Duration:
-				spec[k] = fmt.Sprintf("%d", uint64(t.Seconds()))
+				specResponse.Data[k] = strconv.FormatUint(uint64(t.Seconds()), 10)
 			case []byte:
-				spec[k] = fmt.Sprintf("%#x", t)
+				specResponse.Data[k] = fmt.Sprintf("%#x", t)
 			case uint64:
-				spec[k] = fmt.Sprintf("%d", t)
+				specResponse.Data[k] = strconv.FormatUint(t, 10)
 			}
 		}
 
 		if viper.GetBool("json") {
-			data, err := json.Marshal(spec)
+			data, err := json.Marshal(specResponse.Data)
 			errCheck(err, "Failed to marshal JSON")
 			fmt.Printf("%s\n", string(data))
 		} else {
-			keys := make([]string, 0, len(spec))
-			for k := range spec {
+			keys := make([]string, 0, len(specResponse.Data))
+			for k := range specResponse.Data {
 				keys = append(keys, k)
 			}
 			sort.Strings(keys)
 			for _, key := range keys {
-				fmt.Printf("%s: %v\n", key, spec[key])
+				fmt.Printf("%s: %v\n", key, specResponse.Data[key])
 			}
 		}
 	},

cmd/chainstatus.go

@@ -17,10 +17,12 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/spf13/cobra"
@@ -38,7 +40,7 @@ var chainStatusCmd = &cobra.Command{
     ethdo chain status
 
 In quiet mode this will return 0 if the chain status can be obtained, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx := context.Background()
 
 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
@@ -50,15 +52,24 @@ In quiet mode this will return 0 if the chain status can be obtained, otherwise
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")
 
 		chainTime, err := standardchaintime.New(ctx,
-			standardchaintime.WithGenesisTimeProvider(eth2Client.(eth2client.GenesisTimeProvider)),
+			standardchaintime.WithGenesisProvider(eth2Client.(eth2client.GenesisProvider)),
 			standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
 		)
 		errCheck(err, "Failed to configure chaintime service")
 
 		finalityProvider, isProvider := eth2Client.(eth2client.FinalityProvider)
 		assert(isProvider, "beacon node does not provide finality; cannot report on chain status")
-		finality, err := finalityProvider.Finality(ctx, "head")
+		finalityResponse, err := finalityProvider.Finality(ctx, &api.FinalityOpts{
+			State: "head",
+		})
 		errCheck(err, "Failed to obtain finality information")
+		finality := finalityResponse.Data
+
+		blockProvider, isProvider := eth2Client.(eth2client.SignedBeaconBlockProvider)
+		assert(isProvider, "beacon node does not provide signed beacon blocks; cannot report on chain status")
+		blockResponse, err := blockProvider.SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{Block: "head"})
+		errCheck(err, "Failed to obtain block information")
+		block := blockResponse.Data
 
 		slot := chainTime.CurrentSlot()
 
@@ -73,12 +84,28 @@ In quiet mode this will return 0 if the chain status can be obtained, otherwise
 		nextEpochStartSlot := chainTime.FirstSlotOfEpoch(nextEpoch)
 		nextEpochTimestamp := chainTime.StartOfEpoch(nextEpoch)
 
+		headSlot, err := block.Slot()
+		errCheck(err, "Failed to obtain block slot")
+
 		res := strings.Builder{}
 
 		res.WriteString("Current slot: ")
 		res.WriteString(fmt.Sprintf("%d", slot))
 		res.WriteString("\n")
 
+		res.WriteString("Head slot: ")
+		res.WriteString(fmt.Sprintf("%d", headSlot))
+		if headSlot != slot {
+			if slot-headSlot == 1 {
+				res.WriteString(" (1 slot behind)")
+			} else {
+				res.WriteString(" (")
+				res.WriteString(fmt.Sprintf("%d", slot-headSlot))
+				res.WriteString(" slots behind)")
+			}
+		}
+		res.WriteString("\n")
+
 		res.WriteString("Current epoch: ")
 		res.WriteString(fmt.Sprintf("%d", epoch))
 		res.WriteString("\n")
@@ -126,13 +153,13 @@ In quiet mode this will return 0 if the chain status can be obtained, otherwise
 		if viper.GetBool("verbose") {
 			validatorsProvider, isProvider := eth2Client.(eth2client.ValidatorsProvider)
 			if isProvider {
-				validators, err := validatorsProvider.Validators(ctx, "head", nil)
+				validatorsResponse, err := validatorsProvider.Validators(ctx, &api.ValidatorsOpts{State: "head"})
 				errCheck(err, "Failed to obtain validators information")
 				// Stats of inteest.
 				totalBalance := phase0.Gwei(0)
 				activeEffectiveBalance := phase0.Gwei(0)
 				validatorCount := make(map[apiv1.ValidatorState]int)
-				for _, validator := range validators {
+				for _, validator := range validatorsResponse.Data {
 					validatorCount[validator.Status]++
 					totalBalance += validator.Balance
 					if validator.Status.IsActive() {
@@ -162,7 +189,7 @@ In quiet mode this will return 0 if the chain status can be obtained, otherwise
 			nextPeriodTimestamp := chainTime.StartOfEpoch(nextPeriodStartEpoch)
 
 			res.WriteString("Sync committee period: ")
-			res.WriteString(fmt.Sprintf("%d", period))
+			res.WriteString(strconv.FormatUint(period, 10))
 			res.WriteString("\n")
 
 			if viper.GetBool("verbose") {

cmd/chaintime.go

@@ -27,7 +27,7 @@ var chainTimeCmd = &cobra.Command{
 	Long: `Obtain info about the chain at a given time.  For example:
 
     ethdo chain time --slot=12345`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := chaintime.Run(cmd)
 		if err != nil {
 			return err

cmd/chainverifysignedcontributionandproof.go

@@ -28,7 +28,7 @@ var chainVerifySignedContributionAndProofCmd = &cobra.Command{
     ethdo chain verify signedcontributionandproof --data=... --validator=...
 
 validator can be an account, a public key or an index.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := chainverifysignedcontributionandproof.Run(cmd)
 		if err != nil {
 			return err

cmd/depositverify.go

@@ -16,6 +16,7 @@ package cmd
 import (
 	"bytes"
 	"encoding/hex"
+	"encoding/json"
 	"fmt"
 	"os"
 	"strings"
@@ -44,12 +45,12 @@ var depositVerifyCmd = &cobra.Command{
 	Short: "Verify deposit data matches the provided data",
 	Long: `Verify deposit data matches the provided input data.  For example:
 
-    ethdo deposit verify --data=depositdata.json --withdrawalaccount=primary/current --value="32 Ether"
+    ethdo deposit verify --data=depositdata.json --withdrawalaccount=primary/current --depositvalue="32 Ether"
 
 The deposit data is compared to the supplied withdrawal account/public key, validator public key, and value to ensure they match.
 
 In quiet mode this will return 0 if the data is verified correctly, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		assert(depositVerifyData != "", "--data is required")
 		var data []byte
 		var err error
@@ -75,6 +76,12 @@ In quiet mode this will return 0 if the data is verified correctly, otherwise 1.
 
 		deposits, err := util.DepositInfoFromJSON(data)
 		errCheck(err, "Failed to fetch deposit data")
+		if viper.GetBool("debug") {
+			data, err := json.Marshal(deposits)
+			if err == nil {
+				fmt.Fprintf(os.Stderr, "Deposit data is %s\n", string(data))
+			}
+		}
 
 		var withdrawalCredentials []byte
 		if depositVerifyWithdrawalPubKey != "" {
@@ -263,9 +270,12 @@ func verifyDeposit(deposit *util.DepositInfo, withdrawalCredentials []byte, vali
 				return false, nil
 			}
 
-			if len(deposit.DepositMessageRoot) != 32 {
+			switch {
+			case len(deposit.DepositMessageRoot) != 32:
 				outputIf(!viper.GetBool("quiet"), "Deposit message root not supplied; not checked")
-			} else {
+			case len(withdrawalCredentials) != 32:
+				outputIf(!viper.GetBool("quiet"), "Withdrawal credentials not available; cannot recreate deposit message")
+			default:
 				// We can also verify the deposit message signature.
 				depositMessage := &phase0.DepositMessage{
 					PublicKey:             pubKey,

cmd/epoch.go

@@ -29,8 +29,8 @@ 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) {

cmd/epoch/summary/command.go

@@ -15,9 +15,12 @@ package epochsummary
 
 import (
 	"context"
+	"math/big"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
+	"github.com/attestantio/go-eth2-client/spec"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/spf13/viper"
@@ -35,9 +38,11 @@ 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
@@ -49,49 +54,102 @@ type command struct {
 	beaconCommitteesProvider   eth2client.BeaconCommitteesProvider
 	beaconBlockHeadersProvider eth2client.BeaconBlockHeadersProvider
 
+	// Intermediate data.
+	validatorInfo           map[phase0.ValidatorIndex]*apiv1.Validator
+	participatingValidators map[phase0.ValidatorIndex]struct{}
+	headCorrectValidators   map[phase0.ValidatorIndex]struct{}
+	headTimelyValidators    map[phase0.ValidatorIndex]struct{}
+	sourceTimelyValidators  map[phase0.ValidatorIndex]struct{}
+	targetCorrectValidators map[phase0.ValidatorIndex]struct{}
+	targetTimelyValidators  map[phase0.ValidatorIndex]struct{}
+	participations          map[phase0.ValidatorIndex]*attestingValidator
+
+	// Caches.
+	blocksCache map[string]*spec.VersionedSignedBeaconBlock
+
 	// Results.
 	summary *epochSummary
 }
 
 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"`
+	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"`
+	ActiveBalance              *big.Int              `json:"active_balance"`
+	ParticipatingValidators    int                   `json:"participating_validators"`
+	ParticipatingBalance       *big.Int              `json:"participating_balance"`
+	HeadCorrectValidators      int                   `json:"head_correct_validators"`
+	HeadCorrectBalance         *big.Int              `json:"head_correct_balance"`
+	HeadTimelyValidators       int                   `json:"head_timely_validators"`
+	HeadTimelyBalance          *big.Int              `json:"head_timely_balance"`
+	SourceTimelyValidators     int                   `json:"source_timely_validators"`
+	SourceTimelyBalance        *big.Int              `json:"source_timely_balance"`
+	TargetCorrectValidators    int                   `json:"target_correct_validators"`
+	TargetCorrectBalance       *big.Int              `json:"target_correct_balance"`
+	TargetTimelyValidators     int                   `json:"target_timely_validators"`
+	TargetTimelyBalance        *big.Int              `json:"target_timely_balance"`
+	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"`
+	EffectiveBalance phase0.Gwei           `json:"effective_balance"`
+	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),
+			ActiveBalance:        big.NewInt(0),
+			ParticipatingBalance: big.NewInt(0),
+			HeadCorrectBalance:   big.NewInt(0),
+			HeadTimelyBalance:    big.NewInt(0),
+			SourceTimelyBalance:  big.NewInt(0),
+			TargetCorrectBalance: big.NewInt(0),
+			TargetTimelyBalance:  big.NewInt(0),
+		},
+		validators:              make(map[phase0.ValidatorIndex]struct{}),
+		participatingValidators: make(map[phase0.ValidatorIndex]struct{}),
+		headCorrectValidators:   make(map[phase0.ValidatorIndex]struct{}),
+		headTimelyValidators:    make(map[phase0.ValidatorIndex]struct{}),
+		sourceTimelyValidators:  make(map[phase0.ValidatorIndex]struct{}),
+		targetCorrectValidators: make(map[phase0.ValidatorIndex]struct{}),
+		targetTimelyValidators:  make(map[phase0.ValidatorIndex]struct{}),
+		participations:          make(map[phase0.ValidatorIndex]*attestingValidator),
+		blocksCache:             make(map[string]*spec.VersionedSignedBeaconBlock),
 	}
 
 	// Timeout.

cmd/epoch/summary/output.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 2025 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
@@ -17,6 +17,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"math/big"
 	"strings"
 )
 
@@ -50,7 +51,7 @@ 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++
 		}
@@ -64,17 +65,85 @@ 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")
 		}
 	}
 
-	builder.WriteString(fmt.Sprintf("\n  Attestations: %d/%d (%0.2f%%)", c.summary.ParticipatingValidators, c.summary.ActiveValidators, 100.0*float64(c.summary.ParticipatingValidators)/float64(c.summary.ActiveValidators)))
-	builder.WriteString(fmt.Sprintf("\n    Source timely: %d/%d (%0.2f%%)", c.summary.SourceTimelyValidators, c.summary.ActiveValidators, 100.0*float64(c.summary.SourceTimelyValidators)/float64(c.summary.ActiveValidators)))
-	builder.WriteString(fmt.Sprintf("\n    Target correct: %d/%d (%0.2f%%)", c.summary.TargetCorrectValidators, c.summary.ActiveValidators, 100.0*float64(c.summary.TargetCorrectValidators)/float64(c.summary.ActiveValidators)))
-	builder.WriteString(fmt.Sprintf("\n    Target timely: %d/%d (%0.2f%%)", c.summary.TargetTimelyValidators, c.summary.ActiveValidators, 100.0*float64(c.summary.TargetTimelyValidators)/float64(c.summary.ActiveValidators)))
-	builder.WriteString(fmt.Sprintf("\n    Head correct: %d/%d (%0.2f%%)", c.summary.HeadCorrectValidators, c.summary.ActiveValidators, 100.0*float64(c.summary.HeadCorrectValidators)/float64(c.summary.ActiveValidators)))
-	builder.WriteString(fmt.Sprintf("\n    Head timely: %d/%d (%0.2f%%)", c.summary.HeadTimelyValidators, c.summary.ActiveValidators, 100.0*float64(c.summary.HeadTimelyValidators)/float64(c.summary.ActiveValidators)))
+	gweiToEth := big.NewInt(1e9)
+	mul := big.NewInt(10000)
+	participatingBalancePct := new(big.Int).Div(new(big.Int).Mul(c.summary.ParticipatingBalance, mul), c.summary.ActiveBalance)
+	builder.WriteString(fmt.Sprintf("\n  Attesting balance: %s/%s (%0.2f%%)",
+		new(big.Int).Div(c.summary.ParticipatingBalance, gweiToEth).String(),
+		new(big.Int).Div(c.summary.ActiveBalance, gweiToEth).String(),
+		float64(participatingBalancePct.Uint64())/100.0,
+	))
+
+	sourceTimelyBalancePct := new(big.Int).Div(new(big.Int).Mul(c.summary.SourceTimelyBalance, mul), c.summary.ActiveBalance)
+	builder.WriteString(fmt.Sprintf("\n    Source timely: %s/%s (%0.2f%%)",
+		new(big.Int).Div(c.summary.SourceTimelyBalance, gweiToEth).String(),
+		new(big.Int).Div(c.summary.ActiveBalance, gweiToEth).String(),
+		float64(sourceTimelyBalancePct.Uint64())/100.0,
+	))
+
+	targetCorrectBalancePct := new(big.Int).Div(new(big.Int).Mul(c.summary.TargetCorrectBalance, mul), c.summary.ActiveBalance)
+	builder.WriteString(fmt.Sprintf("\n    Target correct: %s/%s (%0.2f%%)",
+		new(big.Int).Div(c.summary.TargetCorrectBalance, gweiToEth).String(),
+		new(big.Int).Div(c.summary.ActiveBalance, gweiToEth).String(),
+		float64(targetCorrectBalancePct.Uint64())/100.0,
+	))
+
+	targetTimelyBalancePct := new(big.Int).Div(new(big.Int).Mul(c.summary.TargetTimelyBalance, mul), c.summary.ActiveBalance)
+	builder.WriteString(fmt.Sprintf("\n    Target timely: %s/%s (%0.2f%%)",
+		new(big.Int).Div(c.summary.TargetTimelyBalance, gweiToEth).String(),
+		new(big.Int).Div(c.summary.ActiveBalance, gweiToEth).String(),
+		float64(targetTimelyBalancePct.Uint64())/100.0,
+	))
+
+	headCorrectBalancePct := new(big.Int).Div(new(big.Int).Mul(c.summary.HeadCorrectBalance, mul), c.summary.ActiveBalance)
+	builder.WriteString(fmt.Sprintf("\n    Head correct: %s/%s (%0.2f%%)",
+		new(big.Int).Div(c.summary.HeadCorrectBalance, gweiToEth).String(),
+		new(big.Int).Div(c.summary.ActiveBalance, gweiToEth).String(),
+		float64(headCorrectBalancePct.Uint64())/100.0,
+	))
+
+	headTimelyBalancePct := new(big.Int).Div(new(big.Int).Mul(c.summary.HeadTimelyBalance, mul), c.summary.ActiveBalance)
+	builder.WriteString(fmt.Sprintf("\n    Head timely: %s/%s (%0.2f%%)",
+		new(big.Int).Div(c.summary.HeadTimelyBalance, gweiToEth).String(),
+		new(big.Int).Div(c.summary.ActiveBalance, gweiToEth).String(),
+		float64(headTimelyBalancePct.Uint64())/100.0,
+	))
+
+	builder.WriteString(fmt.Sprintf("\n  Attesting validators: %d/%d (%0.2f%%)",
+		c.summary.ParticipatingValidators,
+		c.summary.ActiveValidators,
+		100.0*float64(c.summary.ParticipatingValidators)/float64(c.summary.ActiveValidators),
+	))
+	builder.WriteString(fmt.Sprintf("\n    Source timely: %d/%d (%0.2f%%)",
+		c.summary.SourceTimelyValidators,
+		c.summary.ActiveValidators,
+		100.0*float64(c.summary.SourceTimelyValidators)/float64(c.summary.ActiveValidators),
+	))
+	builder.WriteString(fmt.Sprintf("\n    Target correct: %d/%d (%0.2f%%)",
+		c.summary.TargetCorrectValidators,
+		c.summary.ActiveValidators,
+		100.0*float64(c.summary.TargetCorrectValidators)/float64(c.summary.ActiveValidators),
+	))
+	builder.WriteString(fmt.Sprintf("\n    Target timely: %d/%d (%0.2f%%)",
+		c.summary.TargetTimelyValidators,
+		c.summary.ActiveValidators,
+		100.0*float64(c.summary.TargetTimelyValidators)/float64(c.summary.ActiveValidators),
+	))
+	builder.WriteString(fmt.Sprintf("\n    Head correct: %d/%d (%0.2f%%)",
+		c.summary.HeadCorrectValidators,
+		c.summary.ActiveValidators,
+		100.0*float64(c.summary.HeadCorrectValidators)/float64(c.summary.ActiveValidators),
+	))
+	builder.WriteString(fmt.Sprintf("\n    Head timely: %d/%d (%0.2f%%)",
+		c.summary.HeadTimelyValidators,
+		c.summary.ActiveValidators,
+		100.0*float64(c.summary.HeadTimelyValidators)/float64(c.summary.ActiveValidators),
+	))
 	if c.verbose {
 		// Sort list by validator index.
 		for _, validator := range c.summary.NonParticipatingValidators {
@@ -98,7 +167,7 @@ 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)))

cmd/epoch/summary/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022 - 2025 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
@@ -16,12 +16,14 @@ package epochsummary
 import (
 	"context"
 	"fmt"
+	"math/big"
+	"net/http"
 	"sort"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
 	"github.com/attestantio/go-eth2-client/spec"
-	"github.com/attestantio/go-eth2-client/spec/altair"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
@@ -42,33 +44,55 @@ 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
 	}
 	if err := c.processAttesterDuties(ctx); err != nil {
 		return err
 	}
-	return c.processSyncCommitteeDuties(ctx)
+	if err := c.processSyncCommitteeDuties(ctx); err != nil {
+		return err
+	}
+
+	return c.processBlobs(ctx)
 }
 
 func (c *command) processProposerDuties(ctx context.Context) error {
-	duties, err := c.proposerDutiesProvider.ProposerDuties(ctx, c.summary.Epoch, nil)
+	response, err := c.proposerDutiesProvider.ProposerDuties(ctx, &api.ProposerDutiesOpts{
+		Epoch: c.summary.Epoch,
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain proposer duties")
 	}
-	if duties == nil {
-		return errors.New("empty proposer duties")
-	}
-	for _, duty := range duties {
-		block, err := c.blocksProvider.SignedBeaconBlock(ctx, fmt.Sprintf("%d", duty.Slot))
+
+	for _, duty := range response.Data {
+		block, err := c.fetchBlock(ctx, fmt.Sprintf("%d", duty.Slot))
 		if err != nil {
 			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,
 		})
 	}
 
@@ -76,12 +100,27 @@ func (c *command) processProposerDuties(ctx context.Context) error {
 }
 
 func (c *command) activeValidators(ctx context.Context) (map[phase0.ValidatorIndex]*apiv1.Validator, error) {
-	validators, err := c.validatorsProvider.Validators(ctx, fmt.Sprintf("%d", c.chainTime.FirstSlotOfEpoch(c.summary.Epoch)), nil)
+	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)),
+		Indices: validatorIndices,
+	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain validators for epoch")
 	}
+	c.validatorInfo = response.Data
+
 	activeValidators := make(map[phase0.ValidatorIndex]*apiv1.Validator)
-	for _, validator := range validators {
+	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
 		}
@@ -97,6 +136,10 @@ func (c *command) processAttesterDuties(ctx context.Context) error {
 	}
 	c.summary.ActiveValidators = len(activeValidators)
 
+	for _, validator := range activeValidators {
+		c.summary.ActiveBalance = c.summary.ActiveBalance.Add(c.summary.ActiveBalance, big.NewInt(int64(validator.Validator.EffectiveBalance)))
+	}
+
 	// Obtain number of validators that voted for blocks in the epoch.
 	// These votes can be included anywhere from the second slot of
 	// the epoch to the first slot of the next-but-one epoch.
@@ -106,18 +149,42 @@ 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)
-	if err != nil {
+	if err := c.processSlots(ctx, firstSlot, lastSlot); err != nil {
 		return err
 	}
 
-	c.summary.NonParticipatingValidators = make([]*nonParticipatingValidator, 0, len(activeValidators)-len(votes))
+	c.summary.ParticipatingValidators = len(c.participatingValidators)
+	c.summary.HeadCorrectValidators = len(c.headCorrectValidators)
+	c.summary.HeadTimelyValidators = len(c.headTimelyValidators)
+	c.summary.SourceTimelyValidators = len(c.sourceTimelyValidators)
+	c.summary.TargetCorrectValidators = len(c.targetCorrectValidators)
+	c.summary.TargetTimelyValidators = len(c.targetTimelyValidators)
+
+	c.summary.NonParticipatingValidators = make([]*attestingValidator, 0, len(activeValidators)-len(c.participatingValidators))
 	for activeValidatorIndex := range activeValidators {
-		if _, exists := votes[activeValidatorIndex]; !exists {
-			if _, exists := participations[activeValidatorIndex]; exists {
-				c.summary.NonParticipatingValidators = append(c.summary.NonParticipatingValidators, participations[activeValidatorIndex])
+		if _, exists := c.participatingValidators[activeValidatorIndex]; !exists {
+			if _, exists := c.participations[activeValidatorIndex]; exists {
+				c.summary.NonParticipatingValidators = append(c.summary.NonParticipatingValidators, c.participations[activeValidatorIndex])
+			}
+		}
+		if _, exists := c.headCorrectValidators[activeValidatorIndex]; !exists {
+			if _, exists := c.participations[activeValidatorIndex]; exists {
+				c.summary.NonHeadCorrectValidators = append(c.summary.NonHeadCorrectValidators, c.participations[activeValidatorIndex])
+			}
+		}
+		if _, exists := c.headTimelyValidators[activeValidatorIndex]; !exists {
+			if _, exists := c.participations[activeValidatorIndex]; exists {
+				c.summary.NonHeadTimelyValidators = append(c.summary.NonHeadTimelyValidators, c.participations[activeValidatorIndex])
+			}
+		}
+		if _, exists := c.targetCorrectValidators[activeValidatorIndex]; !exists {
+			if _, exists := c.participations[activeValidatorIndex]; exists {
+				c.summary.NonTargetCorrectValidators = append(c.summary.NonTargetCorrectValidators, c.participations[activeValidatorIndex])
+			}
+		}
+		if _, exists := c.sourceTimelyValidators[activeValidatorIndex]; !exists {
+			if _, exists := c.participations[activeValidatorIndex]; exists {
+				c.summary.NonSourceTimelyValidators = append(c.summary.NonSourceTimelyValidators, c.participations[activeValidatorIndex])
 			}
 		}
 	}
@@ -134,36 +201,20 @@ 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,
-	error,
-) {
-	votes := make(map[phase0.ValidatorIndex]struct{})
-	headCorrects := make(map[phase0.ValidatorIndex]struct{})
-	headTimelys := make(map[phase0.ValidatorIndex]struct{})
-	sourceTimelys := make(map[phase0.ValidatorIndex]struct{})
-	targetCorrects := make(map[phase0.ValidatorIndex]struct{})
-	targetTimelys := make(map[phase0.ValidatorIndex]struct{})
+) error {
 	allCommittees := make(map[phase0.Slot]map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
-	participations := make(map[phase0.ValidatorIndex]*nonParticipatingValidator)
 
 	// Need a cache of beacon block headers to reduce lookup times.
 	headersCache := util.NewBeaconBlockHeaderCache(c.beaconBlockHeadersProvider)
 
 	for slot := firstSlot; slot <= lastSlot; slot++ {
-		block, err := c.blocksProvider.SignedBeaconBlock(ctx, fmt.Sprintf("%d", 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 errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", slot))
 		}
 		if block == nil {
 			// No block at this slot; that's fine.
@@ -171,81 +222,154 @@ 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 err
 		}
 		attestations, err := block.Attestations()
 		if err != nil {
-			return 0, 0, 0, 0, 0, 0, nil, nil, err
+			return 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 errors.Wrap(err, "failed to obtain attestation data")
+			}
+			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 {
-				beaconCommittees, err := c.beaconCommitteesProvider.BeaconCommittees(ctx, fmt.Sprintf("%d", attestation.Data.Slot))
+				response, err := c.beaconCommitteesProvider.BeaconCommittees(ctx, &api.BeaconCommitteesOpts{
+					State: fmt.Sprintf("%d", attestationData.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 errors.Wrap(err, fmt.Sprintf("failed to obtain committees for slot %d", attestationData.Slot))
 				}
-				for _, beaconCommittee := range beaconCommittees {
+				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 := c.participations[index]; !exists {
+							c.participations[index] = &attestingValidator{
+								Validator:        index,
+								EffectiveBalance: c.validatorInfo[index].Validator.EffectiveBalance,
+								Slot:             beaconCommittee.Slot,
+								Committee:        beaconCommittee.Index,
+							}
 						}
 					}
 				}
-				slotCommittees = allCommittees[attestation.Data.Slot]
+				slotCommittees = allCommittees[attestationData.Slot]
 			}
-			committee := slotCommittees[attestation.Data.Index]
-
-			inclusionDistance := slot - attestation.Data.Slot
-			headCorrect, err := util.AttestationHeadCorrect(ctx, headersCache, attestation)
-			if err != nil {
-				return 0, 0, 0, 0, 0, 0, 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
-			}
-
-			for i := uint64(0); i < attestation.AggregationBits.Len(); i++ {
-				if attestation.AggregationBits.BitAt(i) {
-					votes[committee[int(i)]] = struct{}{}
-					if _, exists := headCorrects[committee[int(i)]]; !exists && headCorrect {
-						headCorrects[committee[int(i)]] = struct{}{}
-					}
-					if _, exists := headTimelys[committee[int(i)]]; !exists && headCorrect && inclusionDistance == 1 {
-						headTimelys[committee[int(i)]] = struct{}{}
-					}
-					if _, exists := sourceTimelys[committee[int(i)]]; !exists && inclusionDistance <= 5 {
-						sourceTimelys[committee[int(i)]] = struct{}{}
-					}
-					if _, exists := targetCorrects[committee[int(i)]]; !exists && targetCorrect {
-						targetCorrects[committee[int(i)]] = struct{}{}
-					}
-					if _, exists := targetTimelys[committee[int(i)]]; !exists && targetCorrect && inclusionDistance <= 32 {
-						targetTimelys[committee[int(i)]] = struct{}{}
-					}
-				}
+			if err := c.extractAttestationData(ctx, attestation, attestationData, slotCommittees, slot, headersCache); err != nil {
+				return err
 			}
 		}
 	}
-	return len(votes),
-		len(headCorrects),
-		len(headTimelys),
-		len(sourceTimelys),
-		len(targetCorrects),
-		len(targetTimelys),
-		votes,
-		participations,
-		nil
+
+	return nil
+}
+
+func (c *command) extractAttestationData(ctx context.Context,
+	attestation *spec.VersionedAttestation,
+	attestationData *phase0.AttestationData,
+	slotCommittees map[phase0.CommitteeIndex][]phase0.ValidatorIndex,
+	slot phase0.Slot,
+	headersCache *util.BeaconBlockHeaderCache,
+) error {
+	inclusionDistance := slot - attestationData.Slot
+
+	head, err := util.AttestationHead(ctx, headersCache, attestation)
+	if err != nil {
+		return err
+	}
+	headCorrect, err := util.AttestationHeadCorrect(ctx, headersCache, attestation)
+	if err != nil {
+		return err
+	}
+	target, err := util.AttestationTarget(ctx, headersCache, c.chainTime, attestation)
+	if err != nil {
+		return err
+	}
+	targetCorrect, err := util.AttestationTargetCorrect(ctx, headersCache, c.chainTime, attestation)
+	if err != nil {
+		return err
+	}
+
+	committee := slotCommittees[attestationData.Index]
+	// Update with all of the committees if we have committee bits (from Electra onwards).
+	committeeBits, err := attestation.CommitteeBits()
+	if err == nil {
+		committee = make([]phase0.ValidatorIndex, 0)
+		for _, index := range committeeBits.BitIndices() {
+			committee = append(committee, slotCommittees[phase0.CommitteeIndex(index)]...)
+		}
+	}
+
+	aggregationBits, err := attestation.AggregationBits()
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain aggregation bits")
+	}
+
+	for i := range aggregationBits.Len() {
+		if aggregationBits.BitAt(i) {
+			validatorIndex := committee[i]
+			if len(c.validators) > 0 {
+				if _, exists := c.validators[validatorIndex]; !exists {
+					// Not one of our validators.
+					continue
+				}
+			}
+
+			// Only set the information from the first attestation we find for this validator.
+			if c.participations[validatorIndex].InclusionSlot == 0 {
+				c.participations[validatorIndex].HeadVote = &attestationData.BeaconBlockRoot
+				c.participations[validatorIndex].Head = &head
+				c.participations[validatorIndex].TargetVote = &attestationData.Target.Root
+				c.participations[validatorIndex].Target = &target
+				c.participations[validatorIndex].InclusionSlot = slot
+			}
+
+			validatorBalance := big.NewInt(int64(c.validatorInfo[validatorIndex].Validator.EffectiveBalance))
+			if _, exists := c.participatingValidators[validatorIndex]; !exists {
+				c.summary.ParticipatingBalance = c.summary.ParticipatingBalance.Add(c.summary.ParticipatingBalance, validatorBalance)
+				c.participatingValidators[validatorIndex] = struct{}{}
+			}
+			if _, exists := c.headCorrectValidators[validatorIndex]; !exists && headCorrect {
+				c.headCorrectValidators[validatorIndex] = struct{}{}
+				c.summary.HeadCorrectBalance = c.summary.HeadCorrectBalance.Add(c.summary.HeadCorrectBalance, validatorBalance)
+			}
+			if _, exists := c.headTimelyValidators[validatorIndex]; !exists && headCorrect && inclusionDistance == 1 {
+				c.headTimelyValidators[validatorIndex] = struct{}{}
+				c.summary.HeadTimelyBalance = c.summary.HeadTimelyBalance.Add(c.summary.HeadTimelyBalance, validatorBalance)
+			}
+			if _, exists := c.sourceTimelyValidators[validatorIndex]; !exists && inclusionDistance <= 5 {
+				c.sourceTimelyValidators[validatorIndex] = struct{}{}
+				c.summary.SourceTimelyBalance = c.summary.SourceTimelyBalance.Add(c.summary.SourceTimelyBalance, validatorBalance)
+			}
+			if _, exists := c.targetCorrectValidators[validatorIndex]; !exists && targetCorrect {
+				c.targetCorrectValidators[validatorIndex] = struct{}{}
+				c.summary.TargetCorrectBalance = c.summary.TargetCorrectBalance.Add(c.summary.TargetCorrectBalance, validatorBalance)
+			}
+			if _, exists := c.targetTimelyValidators[validatorIndex]; !exists && targetCorrect && inclusionDistance <= 32 {
+				c.targetTimelyValidators[validatorIndex] = struct{}{}
+				c.summary.TargetTimelyBalance = c.summary.TargetTimelyBalance.Add(c.summary.TargetTimelyBalance, validatorBalance)
+			}
+		}
+	}
+
+	return nil
 }
 
 func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
@@ -254,21 +378,35 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 		return nil
 	}
 
-	committee, err := c.syncCommitteesProvider.SyncCommittee(ctx, fmt.Sprintf("%d", c.summary.FirstSlot))
+	committeeResponse, err := c.syncCommitteesProvider.SyncCommittee(ctx, &api.SyncCommitteeOpts{
+		State: fmt.Sprintf("%d", c.summary.FirstSlot),
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain sync committee")
 	}
+	committee := committeeResponse.Data
 	if len(committee.Validators) == 0 {
 		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
 	}
 
 	for slot := c.summary.FirstSlot; slot <= c.summary.LastSlot; slot++ {
-		block, err := c.blocksProvider.SignedBeaconBlock(ctx, fmt.Sprintf("%d", 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", slot))
 		}
@@ -276,23 +414,26 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 			// If the block is missed we don't count the sync aggregate miss.
 			continue
 		}
-		var aggregate *altair.SyncAggregate
-		switch block.Version {
-		case spec.DataVersionPhase0:
+		if block.Version == spec.DataVersionPhase0 {
 			// No sync committees in this fork.
 			return nil
-		case spec.DataVersionAltair:
-			aggregate = block.Altair.Message.Body.SyncAggregate
-		case spec.DataVersionBellatrix:
-			aggregate = block.Bellatrix.Message.Body.SyncAggregate
-		case spec.DataVersionCapella:
-			aggregate = block.Capella.Message.Body.SyncAggregate
-		default:
-			return fmt.Errorf("unhandled block version %v", block.Version)
 		}
-		for i := uint64(0); i < aggregate.SyncCommitteeBits.Len(); i++ {
+
+		aggregate, err := block.SyncAggregate()
+		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 {
+				if len(c.validators) > 0 {
+					// Not one of ours.
+					continue
+				}
+			}
 			if !aggregate.SyncCommitteeBits.BitAt(i) {
-				missed[committee.Validators[int(i)]]++
+				missed[validatorIndex]++
+				missedSlots[validatorIndex] = append(missedSlots[validatorIndex], slot)
 			}
 		}
 	}
@@ -301,8 +442,9 @@ 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],
 			})
 		}
 	}
@@ -314,7 +456,7 @@ 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
@@ -336,7 +478,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	c.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return errors.Wrap(err, "failed to set up chaintime service")
@@ -370,3 +512,56 @@ func (c *command) setup(ctx context.Context) error {
 
 	return nil
 }
+
+func (c *command) processBlobs(ctx context.Context) error {
+	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", proposal.Slot))
+		}
+		if block == nil {
+			continue
+		}
+		switch block.Version {
+		case spec.DataVersionPhase0, spec.DataVersionAltair, spec.DataVersionBellatrix, spec.DataVersionCapella:
+			// 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)
+		case spec.DataVersionFulu:
+			c.summary.Blobs += len(block.Fulu.Message.Body.BlobKZGCommitments)
+		default:
+			return fmt.Errorf("unhandled block version %v", block.Version)
+		}
+	}
+
+	return nil
+}
+
+func (c *command) fetchBlock(ctx context.Context,
+	blockID string,
+) (
+	*spec.VersionedSignedBeaconBlock,
+	error,
+) {
+	block, exists := c.blocksCache[blockID]
+	if !exists {
+		var err error
+		blockResponse, err := c.blocksProvider.SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+			Block: blockID,
+		})
+		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+				// No block for this slot, that's okay.
+				return nil, nil
+			}
+
+			return nil, errors.Wrap(err, "failed to fetch block")
+		}
+		block = blockResponse.Data
+		c.blocksCache[blockID] = block
+	}
+	return block, nil
+}

cmd/epoch/summary/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 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
@@ -15,8 +15,8 @@ package epochsummary
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -27,14 +27,19 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	c, err := newCommand(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to set up command")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := c.process(ctx); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := c.output(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/epochsummary.go

@@ -29,7 +29,7 @@ var epochSummaryCmd = &cobra.Command{
     ethdo epoch summary --epoch=12345
 
 In quiet mode this will return 0 if information for the epoch is found, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := epochsummary.Run(cmd)
 		if err != nil {
 			return err
@@ -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)
+	}
 }

cmd/exitverify.go

@@ -21,6 +21,7 @@ import (
 	"strings"
 
 	consensusclient "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	v1 "github.com/attestantio/go-eth2-client/api/v1"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
@@ -38,7 +39,7 @@ var exitVerifyCmd = &cobra.Command{
     ethdo exit verify --signed-operation=exitdata.json --validator=primary/current
 
 In quiet mode this will return 0 if the exit is verified correctly, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx := context.Background()
 
 		assert(viper.GetString("signed-operation") != "", "signed-operation is required")
@@ -67,35 +68,39 @@ In quiet mode this will return 0 if the exit is verified correctly, otherwise 1.
 		opRoot, err := signedOp.Message.HashTreeRoot()
 		errCheck(err, "Failed to obtain exit hash tree root")
 
-		genesis, err := eth2Client.(consensusclient.GenesisProvider).Genesis(ctx)
+		genesisResponse, err := eth2Client.(consensusclient.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
 		errCheck(err, "Failed to obtain beacon chain genesis")
+		genesis := genesisResponse.Data
 
-		fork, err := eth2Client.(consensusclient.ForkProvider).Fork(ctx, "head")
-		errCheck(err, "Failed to obtain fork information")
+		response, err := eth2Client.(consensusclient.SpecProvider).Spec(ctx, &api.SpecOpts{})
+		errCheck(err, "Failed to obtain spec information")
 
-		// Check against current and prior fork versions.
+		// Check against Capella fork version (EIP-7044)
 		signatureBytes := make([]byte, 96)
 		copy(signatureBytes, signedOp.Signature[:])
 		sig, err := e2types.BLSSignatureFromBytes(signatureBytes)
 		errCheck(err, "Invalid signature")
 
-		verified := false
-
-		// Try with the current fork.
 		domain := phase0.Domain{}
-		currentExitDomain, err := e2types.ComputeDomain(e2types.DomainVoluntaryExit, fork.CurrentVersion[:], genesis.GenesisValidatorsRoot[:])
-		errCheck(err, "Failed to compute domain")
-		copy(domain[:], currentExitDomain)
-		verified, err = util.VerifyRoot(account, opRoot, domain, sig)
-		errCheck(err, "Failed to verify voluntary exit")
-		if !verified {
-			// Try again with the previous fork.
-			previousExitDomain, err := e2types.ComputeDomain(e2types.DomainVoluntaryExit, fork.PreviousVersion[:], genesis.GenesisValidatorsRoot[:])
-			copy(domain[:], previousExitDomain)
-			errCheck(err, "Failed to compute domain")
-			verified, err = util.VerifyRoot(account, opRoot, domain, sig)
-			errCheck(err, "Failed to verify voluntary exit")
+		forkRaw, ok := response.Data["CAPELLA_FORK_VERSION"]
+		if !ok {
+			err = errors.New("failed to obtain Capella fork version")
 		}
+		errCheck(err, "Failed to obtain fork version")
+
+		fork, ok := forkRaw.(phase0.Version)
+		if !ok {
+			err = errors.New("fork version is not of a valid type")
+		}
+		errCheck(err, "Failed to obtain fork version")
+
+		exitDomain, err := e2types.ComputeDomain(e2types.DomainVoluntaryExit, fork[:], genesis.GenesisValidatorsRoot[:])
+		errCheck(err, "Failed to compute domain")
+
+		copy(domain[:], exitDomain)
+		verified, err := util.VerifyRoot(account, opRoot, domain, sig)
+		errCheck(err, "Failed to verify voluntary exit")
+
 		assert(verified, "Voluntary exit failed to verify against current and previous fork versions")
 
 		outputIf(viper.GetBool("verbose"), "Verified")

cmd/node/events/process.go

@@ -19,7 +19,8 @@ import (
 	"fmt"
 
 	eth2client "github.com/attestantio/go-eth2-client"
-	api "github.com/attestantio/go-eth2-client/api/v1"
+	"github.com/attestantio/go-eth2-client/api"
+	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
 	"github.com/pkg/errors"
 )
 
@@ -28,7 +29,10 @@ func process(ctx context.Context, data *dataIn) error {
 		return errors.New("no data")
 	}
 
-	err := data.eth2Client.(eth2client.EventsProvider).Events(ctx, data.topics, eventHandler)
+	err := data.eth2Client.(eth2client.EventsProvider).Events(ctx, &api.EventsOpts{
+		Topics:  data.topics,
+		Handler: eventHandler,
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to connect for events")
 	}
@@ -38,7 +42,7 @@ func process(ctx context.Context, data *dataIn) error {
 	return nil
 }
 
-func eventHandler(event *api.Event) {
+func eventHandler(event *apiv1.Event) {
 	if event.Data == nil {
 		return
 	}

cmd/node/events/run.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
@@ -15,8 +15,8 @@ package nodeevents
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 )
 
@@ -25,14 +25,19 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := process(ctx, dataIn); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	// Process generates all output.

cmd/nodeevents.go

@@ -27,7 +27,7 @@ var nodeEventsCmd = &cobra.Command{
 	Long: `Report events from a node.  For example:
 
     ethdo node events --events=head,chain_reorg.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := nodeevents.Run(cmd)
 		if err != nil {
 			return err

cmd/nodeinfo.go

@@ -19,6 +19,7 @@ import (
 	"os"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"github.com/wealdtech/ethdo/util"
@@ -32,7 +33,7 @@ var nodeInfoCmd = &cobra.Command{
     ethdo node info
 
 In quiet mode this will return 0 if the node information can be obtained, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx := context.Background()
 
 		eth2Client, err := util.ConnectToBeaconNode(ctx, &util.ConnectOpts{
@@ -48,14 +49,14 @@ In quiet mode this will return 0 if the node information can be obtained, otherw
 		}
 
 		if viper.GetBool("verbose") {
-			version, err := eth2Client.(eth2client.NodeVersionProvider).NodeVersion(ctx)
+			versionResponse, err := eth2Client.(eth2client.NodeVersionProvider).NodeVersion(ctx, &api.NodeVersionOpts{})
 			errCheck(err, "Failed to obtain node version")
-			fmt.Printf("Version: %s\n", version)
+			fmt.Printf("Version: %s\n", versionResponse.Data)
 		}
 
-		syncState, err := eth2Client.(eth2client.NodeSyncingProvider).NodeSyncing(ctx)
+		syncStateResponse, err := eth2Client.(eth2client.NodeSyncingProvider).NodeSyncing(ctx, &api.NodeSyncingOpts{})
 		errCheck(err, "failed to obtain node sync state")
-		fmt.Printf("Syncing: %t\n", syncState.SyncDistance != 0)
+		fmt.Printf("Syncing: %t\n", syncStateResponse.Data.SyncDistance != 0)
 
 		os.Exit(_exitSuccess)
 	},

cmd/proposer/duties/command.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 2023 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
@@ -37,6 +37,7 @@ type command struct {
 
 	// Operation.
 	epoch      string
+	slot       string
 	jsonOutput bool
 
 	// Data access.
@@ -55,23 +56,22 @@ type results struct {
 
 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
-		quiet:   viper.GetBool("quiet"),
-		verbose: viper.GetBool("verbose"),
-		debug:   viper.GetBool("debug"),
-		results: &results{},
+		quiet:                    viper.GetBool("quiet"),
+		verbose:                  viper.GetBool("verbose"),
+		debug:                    viper.GetBool("debug"),
+		timeout:                  viper.GetDuration("timeout"),
+		connection:               viper.GetString("connection"),
+		allowInsecureConnections: viper.GetBool("allow-insecure-connections"),
+		epoch:                    viper.GetString("epoch"),
+		slot:                     viper.GetString("slot"),
+		jsonOutput:               viper.GetBool("json"),
+		results:                  &results{},
 	}
 
 	// Timeout.
-	if viper.GetDuration("timeout") == 0 {
+	if c.timeout == 0 {
 		return nil, errors.New("timeout is required")
 	}
-	c.timeout = viper.GetDuration("timeout")
-
-	c.connection = viper.GetString("connection")
-	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
-
-	c.epoch = viper.GetString("epoch")
-	c.jsonOutput = viper.GetBool("json")
 
 	return c, nil
 }

cmd/proposer/duties/output.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 2023 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
@@ -43,19 +43,32 @@ func (c *command) outputJSON(_ context.Context) (string, error) {
 func (c *command) outputTxt(_ context.Context) (string, error) {
 	builder := strings.Builder{}
 
-	builder.WriteString("Epoch ")
-	builder.WriteString(fmt.Sprintf("%d:\n", c.results.Epoch))
-
-	for _, duty := range c.results.Duties {
-		builder.WriteString("  Slot ")
-		builder.WriteString(fmt.Sprintf("%d: ", duty.Slot))
-		builder.WriteString("validator ")
+	if len(c.results.Duties) == 1 {
+		// Only have a single slot, just print the validator.
+		duty := c.results.Duties[0]
+		builder.WriteString("Validator ")
 		builder.WriteString(fmt.Sprintf("%d", duty.ValidatorIndex))
 		if c.verbose {
 			builder.WriteString(" (pubkey ")
 			builder.WriteString(fmt.Sprintf("%#x)", duty.PubKey))
 		}
 		builder.WriteString("\n")
+	} else {
+		// Have multiple slots, print per-slot information.
+		builder.WriteString("Epoch ")
+		builder.WriteString(fmt.Sprintf("%d:\n", c.results.Epoch))
+
+		for _, duty := range c.results.Duties {
+			builder.WriteString("  Slot ")
+			builder.WriteString(fmt.Sprintf("%d: ", duty.Slot))
+			builder.WriteString("validator ")
+			builder.WriteString(fmt.Sprintf("%d", duty.ValidatorIndex))
+			if c.verbose {
+				builder.WriteString(" (pubkey ")
+				builder.WriteString(fmt.Sprintf("%#x)", duty.PubKey))
+			}
+			builder.WriteString("\n")
+		}
 	}
 
 	return strings.TrimSuffix(builder.String(), "\n"), nil

cmd/proposer/duties/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 2023 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
@@ -17,6 +17,8 @@ import (
 	"context"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
+	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
 	"github.com/pkg/errors"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
 	"github.com/wealdtech/ethdo/util"
@@ -24,20 +26,59 @@ import (
 
 func (c *command) process(ctx context.Context) error {
 	// Obtain information we need to process.
-	err := c.setup(ctx)
-	if err != nil {
+	if err := c.setup(ctx); err != nil {
 		return err
 	}
 
+	if c.slot != "" {
+		return c.processSlot(ctx)
+	}
+
+	return c.processEpoch(ctx)
+}
+
+func (c *command) processSlot(ctx context.Context) error {
+	var err error
+	slot, err := util.ParseSlot(ctx, c.chainTime, c.slot)
+	if err != nil {
+		return errors.Wrap(err, "failed to parse slot")
+	}
+
+	c.results.Epoch = c.chainTime.SlotToEpoch(slot)
+
+	response, err := c.proposerDutiesProvider.ProposerDuties(ctx, &api.ProposerDutiesOpts{
+		Epoch: c.results.Epoch,
+	})
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain proposer duties")
+	}
+
+	c.results.Duties = make([]*apiv1.ProposerDuty, 0, 1)
+
+	for _, duty := range response.Data {
+		if duty.Slot == slot {
+			c.results.Duties = append(c.results.Duties, duty)
+			break
+		}
+	}
+
+	return nil
+}
+
+func (c *command) processEpoch(ctx context.Context) error {
+	var err error
 	c.results.Epoch, err = util.ParseEpoch(ctx, c.chainTime, c.epoch)
 	if err != nil {
 		return errors.Wrap(err, "failed to parse epoch")
 	}
 
-	c.results.Duties, err = c.proposerDutiesProvider.ProposerDuties(ctx, c.results.Epoch, nil)
+	dutiesResponse, err := c.proposerDutiesProvider.ProposerDuties(ctx, &api.ProposerDutiesOpts{
+		Epoch: c.results.Epoch,
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain proposer duties")
 	}
+	c.results.Duties = dutiesResponse.Data
 
 	return nil
 }
@@ -58,7 +99,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	c.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return errors.Wrap(err, "failed to set up chaintime service")

cmd/proposer/duties/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 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
@@ -15,8 +15,8 @@ package proposerduties
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -27,14 +27,19 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	c, err := newCommand(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to set up command")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := c.process(ctx); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := c.output(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/proposerduties.go

@@ -29,7 +29,7 @@ var proposerDutiesCmd = &cobra.Command{
     ethdo proposer duties --epoch=12345
 
 In quiet mode this will return 0 if duties can be obtained, otherwise 1.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := proposerduties.Run(cmd)
 		if err != nil {
 			return err
@@ -48,10 +48,14 @@ func init() {
 	proposerCmd.AddCommand(proposerDutiesCmd)
 	proposerFlags(proposerDutiesCmd)
 	proposerDutiesCmd.Flags().String("epoch", "", "the epoch for which to fetch duties")
+	proposerDutiesCmd.Flags().String("slot", "", "the slot for which to fetch duties")
 }
 
 func proposerDutiesBindings(cmd *cobra.Command) {
 	if err := viper.BindPFlag("epoch", cmd.Flags().Lookup("epoch")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("slot", cmd.Flags().Lookup("slot")); err != nil {
+		panic(err)
+	}
 }

cmd/root.go

@@ -52,6 +52,7 @@ var bindings = map[string]func(cmd *cobra.Command){
 	"attester/inclusion": attesterInclusionBindings,
 	"block/analyze":      blockAnalyzeBindings,
 	"block/info":         blockInfoBindings,
+	"block/trail":        blockTrailBindings,
 	"chain/eth1votes":    chainEth1VotesBindings,
 	"chain/info":         chainInfoBindings,
 	"chain/queues":       chainQueuesBindings,
@@ -76,6 +77,7 @@ var bindings = map[string]func(cmd *cobra.Command){
 	"validator/yield":           validatorYieldBindings,
 	"validator/expectation":     validatorExpectationBindings,
 	"validator/withdrawal":      validatorWithdrawalBindings,
+	"wallet/batch":              walletBatchBindings,
 	"wallet/create":             walletCreateBindings,
 	"wallet/import":             walletImportBindings,
 	"wallet/sharedexport":       walletSharedExportBindings,
@@ -158,7 +160,7 @@ func addPersistentFlags() {
 	if err := viper.BindPFlag("path", RootCmd.PersistentFlags().Lookup("path")); err != nil {
 		panic(err)
 	}
-	RootCmd.PersistentFlags().String("private-key", "", "Private key to provide access to an account")
+	RootCmd.PersistentFlags().String("private-key", "", "Private key to provide access to an account or validator")
 	if err := viper.BindPFlag("private-key", RootCmd.PersistentFlags().Lookup("private-key")); err != nil {
 		panic(err)
 	}
@@ -223,7 +225,7 @@ func addPersistentFlags() {
 	if err := viper.BindPFlag("connection", RootCmd.PersistentFlags().Lookup("connection")); err != nil {
 		panic(err)
 	}
-	RootCmd.PersistentFlags().Duration("timeout", 10*time.Second, "the time after which a network request will be considered failed.  Increase this if you are running on an error-prone, high-latency or low-bandwidth connection")
+	RootCmd.PersistentFlags().Duration("timeout", 30*time.Second, "the time after which a network request will be considered failed.  Increase this if you are running on an error-prone, high-latency or low-bandwidth connection")
 	if err := viper.BindPFlag("timeout", RootCmd.PersistentFlags().Lookup("timeout")); err != nil {
 		panic(err)
 	}

cmd/signatureaggregate.go

@@ -40,7 +40,7 @@ var signatureAggregateCmd = &cobra.Command{
 Signatures are specified as "signature" for simple aggregation, and as "id:signature" for threshold aggregation.
 
 In quiet mode this will return 0 if the signatures can be aggregated, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		assert(len(signatureAggregateSignatures) > 1, "multiple signatures required to aggregate")
 		var signature *bls.Sign
 		var err error

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"
@@ -36,7 +37,7 @@ var signatureSignCmd = &cobra.Command{
     ethdo signature sign --data=0x5f24e819400c6a8ee2bfc014343cd971b7eb707320025a7bcd83e621e26c35b7 --account="Personal wallet/Operations" --passphrase="my account passphrase"
 
 In quiet mode this will return 0 if the data can be signed, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx, cancel := context.WithTimeout(context.Background(), viper.GetDuration("timeout"))
 		defer cancel()
 
@@ -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")
 
@@ -66,7 +69,7 @@ In quiet mode this will return 0 if the data can be signed, otherwise 1.`,
 		copy(specDomain[:], domain)
 		var fixedSizeData [32]byte
 		copy(fixedSizeData[:], data)
-		fmt.Printf("Signing %#x with domain %#x by public key %#x\n", fixedSizeData, specDomain, account.PublicKey().Marshal())
+		outputIf(viper.GetBool("debug"), fmt.Sprintf("Signing %#x with domain %#x by public key %#x", fixedSizeData, specDomain, account.PublicKey().Marshal()))
 		signature, err := util.SignRoot(account, fixedSizeData, specDomain)
 		errCheck(err, "Failed to sign")
 

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"
@@ -41,7 +42,7 @@ var signatureVerifyCmd = &cobra.Command{
     ethdo signature verify --data=0x5f24e819400c6a8ee2bfc014343cd971b7eb707320025a7bcd83e621e26c35b7 --signature=0x8888... --account="Personal wallet/Operations"
 
 In quiet mode this will return 0 if the data can be signed, otherwise 1.`,
-	Run: func(cmd *cobra.Command, args []string) {
+	Run: func(_ *cobra.Command, _ []string) {
 		ctx, cancel := context.WithTimeout(context.Background(), viper.GetDuration("timeout"))
 		defer cancel()
 
@@ -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()))

cmd/slot/time/process.go

@@ -19,6 +19,7 @@ import (
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	"github.com/pkg/errors"
 )
 
@@ -41,17 +42,18 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		return nil, errors.New("slot must be a positive integer")
 	}
 
-	genesis, err := data.eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
+	genesisResponse, err := data.eth2Client.(eth2client.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain genesis information")
 	}
+	genesis := genesisResponse.Data
 
-	config, err := data.eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	specResponse, err := data.eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain chain specifications")
 	}
 
-	slotDuration := config["SECONDS_PER_SLOT"].(time.Duration)
+	slotDuration := specResponse.Data["SECONDS_PER_SLOT"].(time.Duration)
 
 	results.startTime = genesis.GenesisTime.Add((time.Duration(slot*int64(slotDuration.Seconds())) * time.Second))
 	results.endTime = results.startTime.Add(slotDuration)

cmd/slot/time/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading
+// Copyright © 2021, 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
@@ -15,8 +15,8 @@ package slottime
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -26,7 +26,7 @@ func Run(cmd *cobra.Command) (string, error) {
 	ctx := context.Background()
 	dataIn, err := input(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain input")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
@@ -34,7 +34,12 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	dataOut, err := process(ctx, dataIn)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := output(ctx, dataOut)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/slottime.go

@@ -29,7 +29,7 @@ var slotTimeCmd = &cobra.Command{
     ethdo slot time --slot=12345
 
 In quiet mode this will return 0.`,
-	RunE: func(cmd *cobra.Command, args []string) error {
+	RunE: func(cmd *cobra.Command, _ []string) error {
 		res, err := slottime.Run(cmd)
 		if err != nil {
 			return err

cmd/synccommittee/inclusion/output.go

@@ -16,6 +16,7 @@ package inclusion
 import (
 	"context"
 	"fmt"
+	"strconv"
 	"strings"
 )
 
@@ -53,13 +54,13 @@ func (c *command) output(_ context.Context) (string, error) {
 			}
 		}
 		builder.WriteString("Expected: ")
-		builder.WriteString(fmt.Sprintf("%d", len(c.inclusions)))
+		builder.WriteString(strconv.Itoa(len(c.inclusions)))
 		builder.WriteString("\nIncluded: ")
-		builder.WriteString(fmt.Sprintf("%d", included))
+		builder.WriteString(strconv.Itoa(included))
 		builder.WriteString("\nMissed: ")
-		builder.WriteString(fmt.Sprintf("%d", missed))
+		builder.WriteString(strconv.Itoa(missed))
 		builder.WriteString("\nNo block: ")
-		builder.WriteString(fmt.Sprintf("%d", noBlock))
+		builder.WriteString(strconv.Itoa(noBlock))
 
 		builder.WriteString("\nPer-slot result: ")
 		for i, inclusion := range c.inclusions {

cmd/synccommittee/inclusion/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 2023 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
@@ -16,8 +16,10 @@ package inclusion
 import (
 	"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/altair"
 	"github.com/pkg/errors"
@@ -41,10 +43,14 @@ func (c *command) process(ctx context.Context) error {
 		return err
 	}
 
-	syncCommittee, err := c.eth2Client.(eth2client.SyncCommitteesProvider).SyncCommitteeAtEpoch(ctx, "head", c.epoch)
+	syncCommitteeResponse, err := c.eth2Client.(eth2client.SyncCommitteesProvider).SyncCommittee(ctx, &api.SyncCommitteeOpts{
+		State: "head",
+		Epoch: &c.epoch,
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain sync committee information")
 	}
+	syncCommittee := syncCommitteeResponse.Data
 
 	if syncCommittee == nil {
 		return errors.New("no sync committee returned")
@@ -66,11 +72,20 @@ func (c *command) process(ctx context.Context) error {
 		if lastSlot > c.chainTime.CurrentSlot() {
 			lastSlot = c.chainTime.CurrentSlot()
 		}
-		for slot := firstSlot; slot < lastSlot; slot++ {
-			block, err := c.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, fmt.Sprintf("%d", slot))
+		for slot := firstSlot; slot <= lastSlot; slot++ {
+			blockResponse, err := c.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+				Block: fmt.Sprintf("%d", slot),
+			})
 			if err != nil {
-				return err
+				var apiErr *api.Error
+				if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+					c.inclusions = append(c.inclusions, 0)
+					continue
+				}
+				return errors.Wrap(err, "failed to obtain beacon block")
 			}
+
+			block := blockResponse.Data
 			if block == nil {
 				c.inclusions = append(c.inclusions, 0)
 				continue
@@ -98,6 +113,27 @@ func (c *command) process(ctx context.Context) error {
 				} else {
 					c.inclusions = append(c.inclusions, 2)
 				}
+			case spec.DataVersionDeneb:
+				aggregate = block.Deneb.Message.Body.SyncAggregate
+				if aggregate.SyncCommitteeBits.BitAt(c.committeeIndex) {
+					c.inclusions = append(c.inclusions, 1)
+				} 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)
+				}
+			case spec.DataVersionFulu:
+				aggregate = block.Fulu.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)
 			}
@@ -123,7 +159,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	c.chainTime, err = standardchaintime.New(ctx,
 		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
-		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.eth2Client.(eth2client.GenesisProvider)),
 	)
 	if err != nil {
 		return errors.Wrap(err, "failed to set up chaintime service")

cmd/synccommittee/inclusion/run.go

@@ -1,4 +1,4 @@
-// Copyright © 2022 Weald Technology Trading.
+// Copyright © 2022, 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
@@ -15,8 +15,8 @@ package inclusion
 
 import (
 	"context"
+	"errors"
 
-	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 )
@@ -27,14 +27,19 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	c, err := newCommand(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to set up command")
+		return "", errors.Join(errors.New("failed to set up command"), err)
 	}
 
 	// Further errors do not need a usage report.
 	cmd.SilenceUsage = true
 
 	if err := c.process(ctx); err != nil {
-		return "", errors.Wrap(err, "failed to process")
+		switch {
+		case errors.Is(err, context.DeadlineExceeded):
+			return "", errors.New("operation timed out; try increasing with --timeout option")
+		default:
+			return "", errors.Join(errors.New("failed to process"), err)
+		}
 	}
 
 	if viper.GetBool("quiet") {
@@ -43,7 +48,7 @@ func Run(cmd *cobra.Command) (string, error) {
 
 	results, err := c.output(ctx)
 	if err != nil {
-		return "", errors.Wrap(err, "failed to obtain output")
+		return "", errors.Join(errors.New("failed to obtain output"), err)
 	}
 
 	return results, nil

cmd/synccommittee/members/input.go

@@ -63,7 +63,7 @@ func input(ctx context.Context) (*dataIn, error) {
 
 	// Chain time.
 	data.chainTime, err = standardchaintime.New(ctx,
-		standardchaintime.WithGenesisTimeProvider(data.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(data.eth2Client.(eth2client.GenesisProvider)),
 		standardchaintime.WithSpecProvider(data.eth2Client.(eth2client.SpecProvider)),
 	)
 	if err != nil {

cmd/synccommittee/members/output_internal_test.go

@@ -50,7 +50,7 @@ func TestOutput(t *testing.T) {
 				json:       true,
 				validators: []phase0.ValidatorIndex{1, 2, 3},
 			},
-			res: "[1,2,3]",
+			res: `["1","2","3"]`,
 		},
 	}