Update dependencies.

Bump go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc from 0.45.0 to 0.46.0

.github/workflows/docker.yml

@@ -0,0 +1,58 @@
+name: Docker
+
+on:
+  push:
+
+jobs:
+  # Set variables that will be available to all builds.
+  env_vars:
+    runs-on: ubuntu-22.04
+    outputs:
+      release_version: ${{ steps.release_version.outputs.release_version }}
+      binary: ${{ steps.binary.outputs.binary }}
+    steps:
+      - id: release_version
+        run: |
+          RELEASE_VERSION=$(echo ${{ github.ref_name }} | sed -e 's/^[vt]//')
+          echo "release_version=${RELEASE_VERSION}" >> $GITHUB_OUTPUT
+      - id: binary
+        run: |
+          BINARY=$(basename ${{ github.repository }})
+          echo "binary=${BINARY}" >> $GITHUB_OUTPUT
+
+  # Build.
+  build:
+    runs-on: ubuntu-22.04
+    needs: [env_vars]
+    steps:
+      - name: Check out repository into the Go module directory
+        uses: actions/checkout@v3
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v2
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v2
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push
+        uses: docker/build-push-action@v4
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64/v8
+          push: true
+          tags: wealdtech/ethdo:latest
+
+      - name: build and push on release
+        uses: docker/build-push-action@v4
+        if: ${{ github.event.release.tag_name != '' }}
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64/v8
+          push: true
+          tags: wealdtech/ethdo:${{ github.event.release.tag_name }}

.golangci.yml

@@ -128,6 +128,7 @@ linters:
     - contextcheck
     - cyclop
     - deadcode
+    - depguard
     - dupl
     - errorlint
     - exhaustive

CHANGELOG.md

@@ -1,3 +1,52 @@
+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:1.20-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.
 
@@ -171,6 +171,15 @@ 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

@@ -22,6 +22,7 @@ import (
 	"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 +35,7 @@ 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 +47,7 @@ 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 +60,12 @@ 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 +86,7 @@ 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 +134,18 @@ 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 +251,18 @@ 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,
@@ -256,20 +272,20 @@ func ObtainChainInfoFromNode(ctx context.Context,
 	}
 
 	// 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 +293,34 @@ 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/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
@@ -28,6 +28,7 @@ type dataIn struct {
 	// Output options.
 	showPrivateKey            bool
 	showWithdrawalCredentials bool
+	generateKeystore          bool
 }
 
 func input(_ context.Context) (*dataIn, error) {
@@ -54,5 +55,8 @@ 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 +15,30 @@ 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 {
 	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 +46,17 @@ 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 +66,38 @@ 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")
+	}
+
+	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
@@ -40,7 +40,9 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	results := &dataOut{
 		showPrivateKey:            data.showPrivateKey,
 		showWithdrawalCredentials: data.showWithdrawalCredentials,
+		generateKeystore:          data.generateKeystore,
 		key:                       key.(*e2types.BLSPrivateKey),
+		path:                      data.path,
 	}
 
 	return results, nil

cmd/accountderive.go

@@ -49,6 +49,7 @@ 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")
 }
 
 func accountDeriveBindings(cmd *cobra.Command) {
@@ -58,4 +59,7 @@ 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)
+	}
 }

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/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

@@ -16,6 +16,7 @@ package attesterinclusion
 import (
 	"context"
 	"fmt"
+	"strconv"
 	"strings"
 
 	"github.com/attestantio/go-eth2-client/spec/phase0"
@@ -49,7 +50,7 @@ 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 +17,11 @@ 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/phase0"
 	"github.com/pkg/errors"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
@@ -38,7 +40,7 @@ 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 +63,22 @@ 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")
 		}
@@ -78,7 +88,7 @@ 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")
 		}
@@ -121,21 +131,25 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 func calcHeadCorrect(ctx context.Context, data *dataIn, attestation *phase0.Attestation) (bool, error) {
 	slot := attestation.Data.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[:], attestation.Data.BeaconBlockRoot[:]), nil
 	}
 }
 
@@ -143,30 +157,38 @@ func calcTargetCorrect(ctx context.Context, data *dataIn, attestation *phase0.At
 	// Start with first slot of the target epoch.
 	slot := data.chainTime.FirstSlotOfEpoch(attestation.Data.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[:], attestation.Data.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/block/analyze/output.go

@@ -17,6 +17,7 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"strconv"
 	"strings"
 )
 
@@ -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
@@ -19,6 +19,7 @@ import (
 	"fmt"
 
 	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 +34,17 @@ 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 == 404 {
+			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 {
@@ -145,7 +150,7 @@ func (c *command) analyzeAttestations(ctx context.Context, block *spec.Versioned
 			}
 
 			// Calculate head timely.
-			analysis.HeadTimely = attestation.Data.Slot == slot-1
+			analysis.HeadTimely = analysis.HeadCorrect && attestation.Data.Slot == slot-1
 
 			// Calculate source timely.
 			analysis.SourceTimely = attestation.Data.Slot >= slot-5
@@ -157,7 +162,11 @@ 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 = attestation.Data.Slot >= slot-32
+			} else {
+				analysis.TargetTimely = true
+			}
 		}
 
 		// Calculate score and value.
@@ -184,12 +193,30 @@ func (c *command) fetchParents(ctx context.Context, block *spec.VersionedSignedB
 	if err != nil {
 		return err
 	}
+	root, err := block.Deneb.HashTreeRoot()
+	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 == 404 {
+			return errors.New("empty beacon block")
+		}
 		return err
 	}
+	parentBlock := parentBlockResponse.Data
 	if parentBlock == nil {
 		return fmt.Errorf("unable to obtain parent block %s", parentBlock)
 	}
@@ -267,7 +294,7 @@ 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 +316,12 @@ 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 +332,7 @@ 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 +342,7 @@ 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 +352,7 @@ 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 +362,7 @@ 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 +372,7 @@ 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)
@@ -362,22 +389,31 @@ func (c *command) calcHeadCorrect(ctx context.Context, attestation *phase0.Attes
 	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 == 404 {
+					if c.debug {
+						fmt.Printf("No block available for slot %d, assuming not in canonical chain", slot)
+					}
+					return false, nil
+				}
 				return false, err
 			}
-			if 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[attestation.Data.Slot] = response.Data.Root
+			root = response.Data.Root
 			break
 		}
 	}
@@ -391,22 +427,30 @@ func (c *command) calcTargetCorrect(ctx context.Context, attestation *phase0.Att
 		// Start with first slot of the target epoch.
 		slot := c.chainTime.FirstSlotOfEpoch(attestation.Data.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 == 404 {
+					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[attestation.Data.Slot] = response.Data.Root
+			root = response.Data.Root
 			break
 		}
 	}
@@ -439,6 +483,13 @@ 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
 	default:
 		return fmt.Errorf("unsupported block version %d", block.Version)
 	}

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
@@ -20,14 +20,17 @@ import (
 	"fmt"
 	"math/big"
 	"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/phase0"
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/go-bitfield"
@@ -54,6 +57,7 @@ func output(_ context.Context, data *dataOut) (string, error) {
 func outputBlockGeneral(_ context.Context,
 	verbose bool,
 	slot phase0.Slot,
+	proposerIndex phase0.ValidatorIndex,
 	blockRoot phase0.Root,
 	bodyRoot phase0.Root,
 	parentRoot phase0.Root,
@@ -69,6 +73,7 @@ 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))
@@ -113,12 +118,14 @@ 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)
 							}
@@ -163,11 +170,14 @@ 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))
 			}
 
@@ -220,11 +230,14 @@ 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 +253,16 @@ 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 +278,9 @@ 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 +288,16 @@ 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++ {
 							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 +332,7 @@ 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 +407,116 @@ 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 = outputDenebBlobInfo(ctx, data.verbose, signedBlock.Message.Body, blobs)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	return res.String(), nil
+}
+
 func outputBellatrixBlockText(ctx context.Context, data *dataOut, signedBlock *bellatrix.SignedBeaconBlock) (string, error) {
 	if signedBlock == nil {
 		return "", errors.New("no block supplied")
@@ -410,6 +539,7 @@ 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 +630,7 @@ 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 +714,7 @@ 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,
@@ -676,7 +808,7 @@ 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 +838,100 @@ 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 outputDenebBlobInfo(_ context.Context,
+	verbose bool,
+	body *deneb.BeaconBlockBody,
+	blobs []*deneb.BlobSidecar,
+) (
+	string,
+	error,
+) {
+	if body == nil {
+		return "", nil
+	}
+
+	if !verbose {
+		return fmt.Sprintf("Blobs: %d\n", len(body.BlobKZGCommitments)), nil
+	}
+
+	res := strings.Builder{}
+
+	for i, blob := range blobs {
+		if i == 0 {
+			res.WriteString("Blobs\n")
+		}
+		res.WriteString(fmt.Sprintf("  Index: %d\n", blob.Index))
+		res.WriteString(fmt.Sprintf("  KZG commitment: %s\n", body.BlobKZGCommitments[i].String()))
+	}
+
+	return res.String(), nil
+}
+
 func outputBellatrixBlockExecutionPayload(_ context.Context,
 	verbose bool,
 	payload *bellatrix.ExecutionPayload,
@@ -744,7 +970,7 @@ 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: ")

cmd/block/info/process.go

@@ -17,16 +17,23 @@ 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/phase0"
 	"github.com/pkg/errors"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
 )
 
 var (
@@ -39,8 +46,8 @@ 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{
@@ -49,40 +56,72 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		eth2Client: data.eth2Client,
 	}
 
-	config, err := results.eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	specResponse, err := results.eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to connect to obtain configuration information")
 	}
-	genesis, err := results.eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
+	genesisResponse, err := results.eth2Client.(eth2client.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to connect to obtain genesis information")
 	}
+	genesis := genesisResponse.Data
 	results.genesisTime = genesis.GenesisTime
-	results.slotDuration = config["SECONDS_PER_SLOT"].(time.Duration)
-	results.slotsPerEpoch = config["SLOTS_PER_EPOCH"].(uint64)
+	results.slotDuration = specResponse.Data["SECONDS_PER_SLOT"].(time.Duration)
+	results.slotsPerEpoch = specResponse.Data["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
+		}
+	}
+
+	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")
 	}
-	if signedBlock == nil {
-		return nil, errors.New("empty beacon block")
+	block := blockResponse.Data
+	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 {
+		if err := outputPhase0Block(ctx, data.jsonOutput, block.Phase0); err != nil {
 			return nil, errors.Wrap(err, "failed to output block")
 		}
 	case spec.DataVersionAltair:
-		if err := outputAltairBlock(ctx, data.jsonOutput, data.sszOutput, signedBlock.Altair); err != nil {
+		if err := outputAltairBlock(ctx, data.jsonOutput, data.sszOutput, block.Altair); err != nil {
 			return nil, errors.Wrap(err, "failed to output block")
 		}
 	case spec.DataVersionBellatrix:
-		if err := outputBellatrixBlock(ctx, data.jsonOutput, data.sszOutput, signedBlock.Bellatrix); err != nil {
+		if err := outputBellatrixBlock(ctx, data.jsonOutput, data.sszOutput, block.Bellatrix); err != nil {
 			return nil, errors.Wrap(err, "failed to output block")
 		}
 	case spec.DataVersionCapella:
-		if err := outputCapellaBlock(ctx, data.jsonOutput, data.sszOutput, signedBlock.Capella); err != nil {
+		if err := outputCapellaBlock(ctx, data.jsonOutput, data.sszOutput, block.Capella); err != nil {
+			return nil, errors.Wrap(err, "failed to output block")
+		}
+	case spec.DataVersionDeneb:
+		blobSidecarsResponse, err := results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: data.blockID,
+		})
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to obtain blob sidecars")
+		}
+		blobSidecars := blobSidecarsResponse.Data
+		if err := outputDenebBlock(ctx, data.jsonOutput, data.sszOutput, block.Deneb, blobSidecars); err != nil {
 			return nil, errors.Wrap(err, "failed to output block")
 		}
 	default:
@@ -105,61 +144,57 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	return &dataOut{}, nil
 }
 
-func headEventHandler(event *api.Event) {
+func headEventHandler(event *apiv1.Event) {
+	ctx := context.Background()
+
 	// Only interested in head events.
 	if event.Topic != "head" {
 		return
 	}
 
-	blockID := fmt.Sprintf("%#x", event.Data.(*api.HeadEvent).Block[:])
-	signedBlock, err := results.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(context.Background(), blockID)
+	blockID := fmt.Sprintf("%#x", event.Data.(*apiv1.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)
-			}
-			return
+		err = outputCapellaBlock(ctx, jsonOutput, sszOutput, block.Capella)
+	case spec.DataVersionDeneb:
+		var blobSidecarsResponse *api.Response[[]*deneb.BlobSidecar]
+		blobSidecarsResponse, err = results.eth2Client.(eth2client.BlobSidecarsProvider).BlobSidecars(ctx, &api.BlobSidecarsOpts{
+			Block: blockID,
+		})
+		if err == nil {
+			err = outputDenebBlock(context.Background(), jsonOutput, sszOutput, block.Deneb, blobSidecarsResponse.Data)
 		}
 	default:
-		if !jsonOutput && !sszOutput {
-			fmt.Printf("Unknown block version: %v\n", signedBlock.Version)
-		}
+		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 +289,70 @@ 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 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/blockinfo.go

@@ -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/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 +77,33 @@ 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
 	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 +135,7 @@ 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 +151,12 @@ 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 +165,7 @@ 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/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/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/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 {
@@ -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/chaininfo.go

@@ -20,6 +20,7 @@ import (
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/api"
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
@@ -45,32 +46,32 @@ 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 +80,8 @@ 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))
 
 		os.Exit(_exitSuccess)
 	},

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"
@@ -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"
@@ -50,15 +52,18 @@ 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
 
 		slot := chainTime.CurrentSlot()
 
@@ -126,13 +131,13 @@ 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 +167,7 @@ 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/depositverify.go

@@ -16,6 +16,7 @@ package cmd
 import (
 	"bytes"
 	"encoding/hex"
+	"encoding/json"
 	"fmt"
 	"os"
 	"strings"
@@ -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/summary/command.go

@@ -18,6 +18,7 @@ import (
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/spec"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/spf13/viper"
@@ -49,6 +50,9 @@ type command struct {
 	beaconCommitteesProvider   eth2client.BeaconCommitteesProvider
 	beaconBlockHeadersProvider eth2client.BeaconBlockHeadersProvider
 
+	// Caches.
+	blocksCache map[string]*spec.VersionedSignedBeaconBlock
+
 	// Results.
 	summary *epochSummary
 }
@@ -67,6 +71,7 @@ type epochSummary struct {
 	TargetCorrectValidators    int                          `json:"target_correct_validators"`
 	TargetTimelyValidators     int                          `json:"target_timely_validators"`
 	NonParticipatingValidators []*nonParticipatingValidator `json:"nonparticipating_validators"`
+	Blobs                      int                          `json:"blobs"`
 }
 
 type epochProposal struct {
@@ -88,10 +93,11 @@ type nonParticipatingValidator struct {
 
 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"),
+		summary:     &epochSummary{},
+		blocksCache: make(map[string]*spec.VersionedSignedBeaconBlock),
 	}
 
 	// Timeout.

cmd/epoch/summary/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
@@ -16,12 +16,13 @@ package epochsummary
 import (
 	"context"
 	"fmt"
+	"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"
@@ -48,19 +49,22 @@ func (c *command) process(ctx context.Context) error {
 	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))
 		}
@@ -76,12 +80,14 @@ 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)
+	response, err := c.validatorsProvider.Validators(ctx, &api.ValidatorsOpts{
+		State: fmt.Sprintf("%d", c.chainTime.FirstSlotOfEpoch(c.summary.Epoch)),
+	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain validators for epoch")
 	}
 	activeValidators := make(map[phase0.ValidatorIndex]*apiv1.Validator)
-	for _, validator := range validators {
+	for _, validator := range response.Data {
 		if validator.Validator.ActivationEpoch <= c.summary.Epoch && validator.Validator.ExitEpoch > c.summary.Epoch {
 			activeValidators[validator.Index] = validator
 		}
@@ -161,7 +167,7 @@ func (c *command) processSlots(ctx context.Context,
 	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))
 		}
@@ -184,11 +190,13 @@ func (c *command) processSlots(ctx context.Context,
 			}
 			slotCommittees, exists := allCommittees[attestation.Data.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", attestation.Data.Slot),
+				})
 				if err != nil {
 					return 0, 0, 0, 0, 0, 0, nil, nil, errors.Wrap(err, fmt.Sprintf("failed to obtain committees for slot %d", attestation.Data.Slot))
 				}
-				for _, beaconCommittee := range beaconCommittees {
+				for _, beaconCommittee := range response.Data {
 					if _, exists := allCommittees[beaconCommittee.Slot]; !exists {
 						allCommittees[beaconCommittee.Slot] = make(map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
 					}
@@ -254,10 +262,13 @@ 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")
 	}
@@ -268,7 +279,7 @@ func (c *command) processSyncCommitteeDuties(ctx context.Context) error {
 	}
 
 	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))
 		}
@@ -276,19 +287,14 @@ 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)
+		}
+
+		aggregate, err := block.SyncAggregate()
+		if err != nil {
+			return errors.Wrapf(err, "failed to obtain sync aggregate for slot %d", slot)
 		}
 		for i := uint64(0); i < aggregate.SyncCommitteeBits.Len(); i++ {
 			if !aggregate.SyncCommitteeBits.BitAt(i) {
@@ -336,7 +342,7 @@ 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 +376,52 @@ func (c *command) setup(ctx context.Context) error {
 
 	return nil
 }
+
+func (c *command) processBlobs(ctx context.Context) error {
+	for slot := c.summary.FirstSlot; slot <= c.summary.LastSlot; slot++ {
+		block, err := c.fetchBlock(ctx, fmt.Sprintf("%d", slot))
+		if err != nil {
+			return errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", 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)
+		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/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"
@@ -67,10 +68,11 @@ 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")
+		response, err := eth2Client.(consensusclient.ForkProvider).Fork(ctx, &api.ForkOpts{State: "head"})
 		errCheck(err, "Failed to obtain fork information")
 
 		// Check against current and prior fork versions.
@@ -83,14 +85,14 @@ In quiet mode this will return 0 if the exit is verified correctly, otherwise 1.
 
 		// Try with the current fork.
 		domain := phase0.Domain{}
-		currentExitDomain, err := e2types.ComputeDomain(e2types.DomainVoluntaryExit, fork.CurrentVersion[:], genesis.GenesisValidatorsRoot[:])
+		currentExitDomain, err := e2types.ComputeDomain(e2types.DomainVoluntaryExit, response.Data.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[:])
+			previousExitDomain, err := e2types.ComputeDomain(e2types.DomainVoluntaryExit, response.Data.PreviousVersion[:], genesis.GenesisValidatorsRoot[:])
 			copy(domain[:], previousExitDomain)
 			errCheck(err, "Failed to compute domain")
 			verified, err = util.VerifyRoot(account, opRoot, domain, sig)

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"
@@ -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/proposerduties.go

@@ -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

@@ -76,6 +76,7 @@ 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 +159,7 @@ 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 +224,7 @@ 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/signaturesign.go

@@ -66,7 +66,7 @@ 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/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/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 +113,13 @@ 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)
+				}
 			default:
 				return fmt.Errorf("unhandled block version %v", block.Version)
 			}
@@ -123,7 +145,7 @@ 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/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"]`,
 		},
 	}
 

cmd/synccommittee/members/process.go

@@ -19,6 +19,7 @@ import (
 	"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"
 	"github.com/wealdtech/ethdo/util"
@@ -34,10 +35,14 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		return nil, err
 	}
 
-	syncCommittee, err := data.eth2Client.(eth2client.SyncCommitteesProvider).SyncCommitteeAtEpoch(ctx, "head", epoch)
+	syncCommitteeResponse, err := data.eth2Client.(eth2client.SyncCommitteesProvider).SyncCommittee(ctx, &api.SyncCommitteeOpts{
+		State: "head",
+		Epoch: &epoch,
+	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain sync committee information")
 	}
+	syncCommittee := syncCommitteeResponse.Data
 
 	if syncCommittee == nil {
 		return nil, errors.New("no sync committee returned")

cmd/synccommittee/members/process_internal_test.go

@@ -36,7 +36,7 @@ func TestProcess(t *testing.T) {
 	require.NoError(t, err)
 
 	chainTime, err := standardchaintime.New(context.Background(),
-		standardchaintime.WithGenesisTimeProvider(eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(eth2Client.(eth2client.GenesisProvider)),
 		standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
 	)
 	require.NoError(t, err)

cmd/synccommitteemembers.go

@@ -49,7 +49,7 @@ epoch can be a specific epoch.  period can be 'current' for the current sync per
 func init() {
 	synccommitteeCmd.AddCommand(synccommitteeMembersCmd)
 	synccommitteeFlags(synccommitteeMembersCmd)
-	synccommitteeMembersCmd.Flags().Int64("epoch", -1, "the epoch for which to fetch sync committees")
+	synccommitteeMembersCmd.Flags().String("epoch", "", "the epoch for which to fetch sync committees")
 	synccommitteeMembersCmd.Flags().String("period", "", "the sync committee period for which to fetch sync committees ('current', 'next')")
 }
 

cmd/validator/credentials/get/output.go

@@ -15,6 +15,7 @@ package validatorcredentialsget
 
 import (
 	"context"
+	"encoding/hex"
 	"fmt"
 	"strings"
 
@@ -47,7 +48,7 @@ func (c *command) output(_ context.Context) (string, error) {
 
 // addressBytesToEIP55 converts a byte array in to an EIP-55 string format.
 func addressBytesToEIP55(address []byte) string {
-	bytes := []byte(fmt.Sprintf("%x", address))
+	bytes := []byte(hex.EncodeToString(address))
 	hash := ethutil.Keccak256(bytes)
 	for i := 0; i < len(bytes); i++ {
 		hashByte := hash[i/2]

cmd/validator/credentials/set/process.go

@@ -163,7 +163,7 @@ func (c *command) generateOperationFromMnemonicAndPath(ctx context.Context) erro
 	}
 
 	validatorKeyPath := c.path
-	match := validatorPath.Match([]byte(c.path))
+	match := validatorPath.MatchString(c.path)
 	if !match {
 		return fmt.Errorf("path %s does not match EIP-2334 format for a validator", c.path)
 	}
@@ -732,7 +732,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	// Set up chaintime.
 	c.chainTime, err = standardchaintime.New(ctx,
-		standardchaintime.WithGenesisTimeProvider(c.consensusClient.(consensusclient.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.consensusClient.(consensusclient.GenesisProvider)),
 		standardchaintime.WithSpecProvider(c.consensusClient.(consensusclient.SpecProvider)),
 	)
 	if err != nil {
@@ -828,7 +828,7 @@ func (c *command) obtainForkVersion(_ context.Context) (phase0.Version, error) {
 
 // addressBytesToEIP55 converts a byte array in to an EIP-55 string format.
 func addressBytesToEIP55(address []byte) string {
-	bytes := []byte(fmt.Sprintf("%x", address))
+	bytes := []byte(hex.EncodeToString(address))
 	hash := ethutil.Keccak256(bytes)
 	for i := 0; i < len(bytes); i++ {
 		hashByte := hash[i/2]

cmd/validator/depositdata/output.go

@@ -109,9 +109,10 @@ func validatorDepositDataOutputLaunchpad(datum *dataOut) (string, error) {
 	forkVersionMap := map[spec.Version]string{
 		[4]byte{0x00, 0x00, 0x00, 0x00}: "mainnet",
 		[4]byte{0x00, 0x00, 0x20, 0x09}: "pyrmont",
-		[4]byte{0x00, 0x00, 0x10, 0x20}: "prater",
+		[4]byte{0x00, 0x00, 0x10, 0x20}: "goerli",
 		[4]byte{0x80, 0x00, 0x00, 0x69}: "ropsten",
 		[4]byte{0x90, 0x00, 0x00, 0x69}: "sepolia",
+		[4]byte{0x00, 0x01, 0x70, 0x00}: "holesky",
 	}
 
 	if datum.validatorPubKey == nil {
@@ -137,7 +138,7 @@ func validatorDepositDataOutputLaunchpad(datum *dataOut) (string, error) {
 	if network, exists := forkVersionMap[*datum.forkVersion]; exists {
 		networkName = network
 	}
-	output := fmt.Sprintf(`{"pubkey":"%x","withdrawal_credentials":"%x","amount":%d,"signature":"%x","deposit_message_root":"%x","deposit_data_root":"%x","fork_version":"%x","eth2_network_name":"%s","deposit_cli_version":"1.1.0"}`,
+	output := fmt.Sprintf(`{"pubkey":"%x","withdrawal_credentials":"%x","amount":%d,"signature":"%x","deposit_message_root":"%x","deposit_data_root":"%x","fork_version":"%x","eth2_network_name":"%s","deposit_cli_version":"2.5.0"}`,
 		*datum.validatorPubKey,
 		datum.withdrawalCredentials,
 		datum.amount,

cmd/validator/depositdata/output_internal_test.go

@@ -423,7 +423,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					depositMessageRoot:    depositMessageRoot,
 				},
 			},
-			res: `[{"pubkey":"a99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c","withdrawal_credentials":"00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b","amount":32000000000,"signature":"b7a757a4c506ac6ac5f2d23e065de7d00dc9f5a6a3f9610a8b60b65f166379139ae382c91ecbbf5c9fabc34b1cd2cf8f0211488d50d8754716d8e72e17c1a00b5d9b37cc73767946790ebe66cf9669abfc5c25c67e1e2d1c2e11429d149c25a2","deposit_message_root":"139b510ea7f2788ab82da1f427d6cbe1db147c15a053db738ad5500cd83754a6","deposit_data_root":"9e51b386f4271c18149dd0f73297a26a4a8c15c3622c44af79c92446f44a3554","fork_version":"00002009","eth2_network_name":"pyrmont","deposit_cli_version":"1.1.0"}]`,
+			res: `[{"pubkey":"a99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c","withdrawal_credentials":"00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b","amount":32000000000,"signature":"b7a757a4c506ac6ac5f2d23e065de7d00dc9f5a6a3f9610a8b60b65f166379139ae382c91ecbbf5c9fabc34b1cd2cf8f0211488d50d8754716d8e72e17c1a00b5d9b37cc73767946790ebe66cf9669abfc5c25c67e1e2d1c2e11429d149c25a2","deposit_message_root":"139b510ea7f2788ab82da1f427d6cbe1db147c15a053db738ad5500cd83754a6","deposit_data_root":"9e51b386f4271c18149dd0f73297a26a4a8c15c3622c44af79c92446f44a3554","fork_version":"00002009","eth2_network_name":"pyrmont","deposit_cli_version":"2.5.0"}]`,
 		},
 		{
 			name: "SinglePrater",
@@ -440,7 +440,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					depositMessageRoot:    depositMessageRoot,
 				},
 			},
-			res: `[{"pubkey":"a99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c","withdrawal_credentials":"00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b","amount":32000000000,"signature":"b7a757a4c506ac6ac5f2d23e065de7d00dc9f5a6a3f9610a8b60b65f166379139ae382c91ecbbf5c9fabc34b1cd2cf8f0211488d50d8754716d8e72e17c1a00b5d9b37cc73767946790ebe66cf9669abfc5c25c67e1e2d1c2e11429d149c25a2","deposit_message_root":"139b510ea7f2788ab82da1f427d6cbe1db147c15a053db738ad5500cd83754a6","deposit_data_root":"9e51b386f4271c18149dd0f73297a26a4a8c15c3622c44af79c92446f44a3554","fork_version":"00001020","eth2_network_name":"prater","deposit_cli_version":"1.1.0"}]`,
+			res: `[{"pubkey":"a99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c","withdrawal_credentials":"00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b","amount":32000000000,"signature":"b7a757a4c506ac6ac5f2d23e065de7d00dc9f5a6a3f9610a8b60b65f166379139ae382c91ecbbf5c9fabc34b1cd2cf8f0211488d50d8754716d8e72e17c1a00b5d9b37cc73767946790ebe66cf9669abfc5c25c67e1e2d1c2e11429d149c25a2","deposit_message_root":"139b510ea7f2788ab82da1f427d6cbe1db147c15a053db738ad5500cd83754a6","deposit_data_root":"9e51b386f4271c18149dd0f73297a26a4a8c15c3622c44af79c92446f44a3554","fork_version":"00001020","eth2_network_name":"goerli","deposit_cli_version":"2.5.0"}]`,
 		},
 		{
 			name: "Double",
@@ -468,7 +468,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					depositMessageRoot:    depositMessageRoot2,
 				},
 			},
-			res: `[{"pubkey":"a99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c","withdrawal_credentials":"00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b","amount":32000000000,"signature":"b7a757a4c506ac6ac5f2d23e065de7d00dc9f5a6a3f9610a8b60b65f166379139ae382c91ecbbf5c9fabc34b1cd2cf8f0211488d50d8754716d8e72e17c1a00b5d9b37cc73767946790ebe66cf9669abfc5c25c67e1e2d1c2e11429d149c25a2","deposit_message_root":"139b510ea7f2788ab82da1f427d6cbe1db147c15a053db738ad5500cd83754a6","deposit_data_root":"9e51b386f4271c18149dd0f73297a26a4a8c15c3622c44af79c92446f44a3554","fork_version":"00002009","eth2_network_name":"pyrmont","deposit_cli_version":"1.1.0"},{"pubkey":"b89bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0b","withdrawal_credentials":"00ec7ef7780c9d151597924036262dd28dc60e1228f4da6fecf9d402cb3f3594","amount":32000000000,"signature":"911fe0766e8b79d711dde46bc2142eb51e35be99e5f7da505af9eaad85707bbb8013f0dea35e30403b3e57bb13054c1d0d389aceeba1d4160a148026212c7e017044e3ea69cd96fbd23b6aa9fd1e6f7e82494fbd5f8fc75856711a6b8998926e","deposit_message_root":"bb4b6184b25873cdf430df3838c8d3e3d16cf3dc3b214e2f3ab7df9e6d5a9b52","deposit_data_root":"3b51670e9f266d44c879682a230d60f0d534c64ab25ee68700fe3adb17ddfcab","fork_version":"00002009","eth2_network_name":"pyrmont","deposit_cli_version":"1.1.0"}]`,
+			res: `[{"pubkey":"a99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c","withdrawal_credentials":"00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b","amount":32000000000,"signature":"b7a757a4c506ac6ac5f2d23e065de7d00dc9f5a6a3f9610a8b60b65f166379139ae382c91ecbbf5c9fabc34b1cd2cf8f0211488d50d8754716d8e72e17c1a00b5d9b37cc73767946790ebe66cf9669abfc5c25c67e1e2d1c2e11429d149c25a2","deposit_message_root":"139b510ea7f2788ab82da1f427d6cbe1db147c15a053db738ad5500cd83754a6","deposit_data_root":"9e51b386f4271c18149dd0f73297a26a4a8c15c3622c44af79c92446f44a3554","fork_version":"00002009","eth2_network_name":"pyrmont","deposit_cli_version":"2.5.0"},{"pubkey":"b89bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0b","withdrawal_credentials":"00ec7ef7780c9d151597924036262dd28dc60e1228f4da6fecf9d402cb3f3594","amount":32000000000,"signature":"911fe0766e8b79d711dde46bc2142eb51e35be99e5f7da505af9eaad85707bbb8013f0dea35e30403b3e57bb13054c1d0d389aceeba1d4160a148026212c7e017044e3ea69cd96fbd23b6aa9fd1e6f7e82494fbd5f8fc75856711a6b8998926e","deposit_message_root":"bb4b6184b25873cdf430df3838c8d3e3d16cf3dc3b214e2f3ab7df9e6d5a9b52","deposit_data_root":"3b51670e9f266d44c879682a230d60f0d534c64ab25ee68700fe3adb17ddfcab","fork_version":"00002009","eth2_network_name":"pyrmont","deposit_cli_version":"2.5.0"}]`,
 		},
 	}
 

cmd/validator/depositdata/process.go

@@ -155,7 +155,7 @@ func createWithdrawalCredentials(data *dataIn) ([]byte, error) {
 
 // addressBytesToEIP55 converts a byte array in to an EIP-55 string format.
 func addressBytesToEIP55(address []byte) string {
-	bytes := []byte(fmt.Sprintf("%x", address))
+	bytes := []byte(hex.EncodeToString(address))
 	hash := util.Keccak256(bytes)
 	for i := 0; i < len(bytes); i++ {
 		hashByte := hash[i/2]

cmd/validator/duties/process.go

@@ -18,7 +18,8 @@ import (
 	"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"
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/wealdtech/ethdo/util"
@@ -75,28 +76,32 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	}
 	results.nextEpochAttesterDuty = nextEpochAttesterDuty
 
-	genesis, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
+	genesisResponse, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain genesis data")
 	}
-	results.genesisTime = genesis.GenesisTime
+	results.genesisTime = genesisResponse.Data.GenesisTime
 
-	config, err := eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	specResponse, err := eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain beacon chain configuration")
 	}
-	results.slotsPerEpoch = config["SLOTS_PER_EPOCH"].(uint64)
-	results.slotDuration = config["SECONDS_PER_SLOT"].(time.Duration)
+	results.slotsPerEpoch = specResponse.Data["SLOTS_PER_EPOCH"].(uint64)
+	results.slotDuration = specResponse.Data["SECONDS_PER_SLOT"].(time.Duration)
 
 	return results, nil
 }
 
-func attesterDuty(ctx context.Context, eth2Client eth2client.Service, validatorIndex spec.ValidatorIndex, epoch spec.Epoch) (*api.AttesterDuty, error) {
+func attesterDuty(ctx context.Context, eth2Client eth2client.Service, validatorIndex spec.ValidatorIndex, epoch spec.Epoch) (*apiv1.AttesterDuty, error) {
 	// Find the attesting slot for the given epoch.
-	duties, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, epoch, []spec.ValidatorIndex{validatorIndex})
+	dutiesResponse, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, &api.AttesterDutiesOpts{
+		Epoch:   epoch,
+		Indices: []spec.ValidatorIndex{validatorIndex},
+	})
 	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")
@@ -105,30 +110,33 @@ func attesterDuty(ctx context.Context, eth2Client eth2client.Service, validatorI
 	return duties[0], nil
 }
 
-func proposerDuties(ctx context.Context, eth2Client eth2client.Service, validatorIndex spec.ValidatorIndex, epoch spec.Epoch) ([]*api.ProposerDuty, error) {
+func proposerDuties(ctx context.Context, eth2Client eth2client.Service, validatorIndex spec.ValidatorIndex, epoch spec.Epoch) ([]*apiv1.ProposerDuty, error) {
 	// Fetch the proposer duties for this epoch.
-	proposerDuties, err := eth2Client.(eth2client.ProposerDutiesProvider).ProposerDuties(ctx, epoch, []spec.ValidatorIndex{validatorIndex})
+	proposerDuties, err := eth2Client.(eth2client.ProposerDutiesProvider).ProposerDuties(ctx, &api.ProposerDutiesOpts{
+		Epoch:   epoch,
+		Indices: []spec.ValidatorIndex{validatorIndex},
+	})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain proposer duties")
 	}
 
-	return proposerDuties, nil
+	return proposerDuties.Data, nil
 }
 
 func currentEpoch(ctx context.Context, eth2Client eth2client.Service) (spec.Epoch, error) {
-	config, err := eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	specResponse, err := eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return 0, errors.Wrap(err, "failed to obtain beacon chain configuration")
 	}
-	slotsPerEpoch := config["SLOTS_PER_EPOCH"].(uint64)
-	slotDuration := config["SECONDS_PER_SLOT"].(time.Duration)
-	genesis, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
+	slotsPerEpoch := specResponse.Data["SLOTS_PER_EPOCH"].(uint64)
+	slotDuration := specResponse.Data["SECONDS_PER_SLOT"].(time.Duration)
+
+	genesisResponse, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx, &api.GenesisOpts{})
 	if err != nil {
 		return 0, errors.Wrap(err, "failed to obtain genesis data")
 	}
-
-	if genesis.GenesisTime.After(time.Now()) {
+	if genesisResponse.Data.GenesisTime.After(time.Now()) {
 		return spec.Epoch(0), nil
 	}
-	return spec.Epoch(uint64(time.Since(genesis.GenesisTime).Seconds()) / (uint64(slotDuration.Seconds()) * slotsPerEpoch)), nil
+	return spec.Epoch(uint64(time.Since(genesisResponse.Data.GenesisTime).Seconds()) / (uint64(slotDuration.Seconds()) * slotsPerEpoch)), nil
 }

cmd/validator/exit/command.go

@@ -42,7 +42,8 @@ type command struct {
 	forkVersion           string
 	genesisValidatorsRoot string
 	prepareOffline        bool
-	signedOperationInput  string
+	signedOperationsInput string
+	epoch                 string
 
 	// Beacon node connection.
 	timeout                  time.Duration
@@ -58,7 +59,7 @@ type command struct {
 	chainTime       chaintime.Service
 
 	// Output.
-	signedOperation *phase0.SignedVoluntaryExit
+	signedOperations []*phase0.SignedVoluntaryExit
 }
 
 func newCommand(_ context.Context) (*command, error) {
@@ -76,10 +77,12 @@ func newCommand(_ context.Context) (*command, error) {
 		mnemonic:                 viper.GetString("mnemonic"),
 		path:                     viper.GetString("path"),
 		privateKey:               viper.GetString("private-key"),
-		signedOperationInput:     viper.GetString("signed-operation"),
+		signedOperationsInput:    viper.GetString("signed-operations"),
 		validator:                viper.GetString("validator"),
 		forkVersion:              viper.GetString("fork-version"),
 		genesisValidatorsRoot:    viper.GetString("genesis-validators-root"),
+		epoch:                    viper.GetString("epoch"),
+		signedOperations:         make([]*phase0.SignedVoluntaryExit, 0),
 	}
 
 	// Account and validator are synonymous.

cmd/validator/exit/output.go

@@ -33,15 +33,21 @@ func (c *command) output(_ context.Context) (string, error) {
 	}
 
 	if c.json || c.offline {
-		data, err := json.Marshal(c.signedOperation)
+		var data []byte
+		var err error
+		if len(c.signedOperations) == 1 {
+			data, err = json.Marshal(c.signedOperations[0])
+		} else {
+			data, err = json.Marshal(c.signedOperations)
+		}
 		if err != nil {
-			return "", errors.Wrap(err, "failed to marshal signed operation")
+			return "", errors.Wrap(err, "failed to marshal signed operations")
 		}
 		if c.json {
 			return string(data), nil
 		}
-		if err := os.WriteFile(exitOperationFilename, data, 0o600); err != nil {
-			return "", errors.Wrap(err, fmt.Sprintf("failed to write %s", exitOperationFilename))
+		if err := os.WriteFile(exitOperationsFilename, data, 0o600); err != nil {
+			return "", errors.Wrap(err, fmt.Sprintf("failed to write %s", exitOperationsFilename))
 		}
 		return "", nil
 	}

cmd/validator/exit/process.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"os"
 	"regexp"
+	"strconv"
 	"strings"
 	"time"
 
@@ -48,7 +49,7 @@ var validatorPath = regexp.MustCompile("^m/12381/3600/[0-9]+/0/0$")
 
 var (
 	offlinePreparationFilename = "offline-preparation.json"
-	exitOperationFilename      = "exit-operation.json"
+	exitOperationsFilename     = "exit-operations.json"
 )
 
 func (c *command) process(ctx context.Context) error {
@@ -68,37 +69,41 @@ func (c *command) process(ctx context.Context) error {
 		return err
 	}
 
-	if err := c.obtainOperation(ctx); err != nil {
+	if err := c.obtainOperations(ctx); err != nil {
 		return err
 	}
 
-	if validated, reason := c.validateOperation(ctx); !validated {
-		return fmt.Errorf("operation failed validation: %s", reason)
+	if len(c.signedOperations) == 0 {
+		return errors.New("no suitable validators found; no operations generated")
+	}
+
+	if validated, reason := c.validateOperations(ctx); !validated {
+		return fmt.Errorf("operations failed validation: %s", reason)
 	}
 
 	if c.json || c.offline {
 		if c.debug {
-			fmt.Fprintf(os.Stderr, "Not broadcasting exit operation\n")
+			fmt.Fprintf(os.Stderr, "Not broadcasting exit operations\n")
 		}
 		// Want JSON output, or cannot broadcast.
 		return nil
 	}
 
-	return c.broadcastOperation(ctx)
+	return c.broadcastOperations(ctx)
 }
 
-func (c *command) obtainOperation(ctx context.Context) error {
-	if (c.mnemonic == "" || c.path == "") && c.privateKey == "" && c.validator == "" {
+func (c *command) obtainOperations(ctx context.Context) error {
+	if c.mnemonic == "" && c.privateKey == "" && c.validator == "" {
 		// No input information; fetch the operation from a file.
-		err := c.obtainOperationFromFileOrInput(ctx)
+		err := c.obtainOperationsFromFileOrInput(ctx)
 		if err == nil {
 			// Success.
 			return nil
 		}
-		if c.signedOperationInput != "" {
+		if c.signedOperationsInput != "" {
 			return errors.Wrap(err, "failed to obtain supplied signed operation")
 		}
-		return errors.Wrap(err, fmt.Sprintf("no account, mnemonic or private key specified, and no %s file loaded", exitOperationFilename))
+		return errors.Wrap(err, fmt.Sprintf("no account, mnemonic or private key specified, and no %s file loaded", exitOperationsFilename))
 	}
 
 	if c.mnemonic != "" {
@@ -110,7 +115,8 @@ func (c *command) obtainOperation(ctx context.Context) error {
 			// Have a mnemonic and validator.
 			return c.generateOperationFromMnemonicAndValidator(ctx)
 		default:
-			return errors.New("mnemonic must be supplied with either a path or validator")
+			// Have a mnemonic only.
+			return c.generateOperationsFromMnemonic(ctx)
 		}
 	}
 
@@ -126,20 +132,30 @@ func (c *command) obtainOperation(ctx context.Context) error {
 }
 
 func (c *command) generateOperationFromMnemonicAndPath(ctx context.Context) error {
+	// Turn the validators in to a map for easy lookup.
+	validators := make(map[string]*beacon.ValidatorInfo, 0)
+	for _, validator := range c.chainInfo.Validators {
+		validators[fmt.Sprintf("%#x", validator.Pubkey)] = validator
+	}
+
 	seed, err := util.SeedFromMnemonic(c.mnemonic)
 	if err != nil {
 		return err
 	}
 
 	validatorKeyPath := c.path
-	match := validatorPath.Match([]byte(c.path))
+	match := validatorPath.MatchString(c.path)
 	if !match {
 		return fmt.Errorf("path %s does not match EIP-2334 format for a validator", c.path)
 	}
 
-	if err := c.generateOperationFromSeedAndPath(ctx, seed, validatorKeyPath); err != nil {
+	found, err := c.generateOperationFromSeedAndPath(ctx, validators, seed, validatorKeyPath)
+	if err != nil {
 		return errors.Wrap(err, "failed to generate operation from seed and path")
 	}
+	if !found {
+		return errors.New("no validator found with the provided path and mnemonic, please run with --debug to see more information")
+	}
 
 	return nil
 }
@@ -155,6 +171,10 @@ func (c *command) generateOperationFromMnemonicAndValidator(ctx context.Context)
 		return err
 	}
 
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "Searching for validator with index %d and public key %s\n", validatorInfo.Index, validatorInfo.Pubkey.String())
+	}
+
 	// Scan the keys from the seed to find the path.
 	maxDistance := 1024
 	// Start scanning the validator keys.
@@ -187,6 +207,49 @@ func (c *command) generateOperationFromMnemonicAndValidator(ctx context.Context)
 	return nil
 }
 
+func (c *command) generateOperationsFromMnemonic(ctx context.Context) error {
+	seed, err := util.SeedFromMnemonic(c.mnemonic)
+	if err != nil {
+		return err
+	}
+
+	// Turn the validators in to a map for easy lookup.
+	validators := make(map[string]*beacon.ValidatorInfo, 0)
+	for _, validator := range c.chainInfo.Validators {
+		validators[fmt.Sprintf("%#x", validator.Pubkey)] = validator
+	}
+
+	maxDistance := 1024
+	// Start scanning the validator keys.
+	lastFoundIndex := 0
+	foundValidatorCount := 0
+	for i := 0; ; i++ {
+		// If no validators have been found in the last maxDistance indices, stop scanning.
+		if i-lastFoundIndex > maxDistance {
+			// If no validators were found at all, return an error.
+			if foundValidatorCount == 0 {
+				return fmt.Errorf("failed to find validators using the provided mnemonic: searched %d indices without finding a validator", maxDistance)
+			}
+			break
+		}
+		validatorKeyPath := fmt.Sprintf("m/12381/3600/%d/0/0", i)
+
+		found, err := c.generateOperationFromSeedAndPath(ctx, validators, seed, validatorKeyPath)
+		if err != nil {
+			// We log errors but keep going.
+			if c.debug {
+				fmt.Fprintf(os.Stderr, "Failed to generate for path %s: %v\n", validatorKeyPath, err.Error())
+			}
+		}
+		if found {
+			lastFoundIndex = i
+			foundValidatorCount++
+		}
+	}
+
+	return nil
+}
+
 func (c *command) generateOperationFromPrivateKey(ctx context.Context) error {
 	validatorAccount, err := util.ParseAccount(ctx, c.privateKey, nil, true)
 	if err != nil {
@@ -205,62 +268,104 @@ func (c *command) generateOperationFromValidator(ctx context.Context) error {
 	return c.generateOperationFromAccount(ctx, validatorAccount)
 }
 
-func (c *command) obtainOperationFromFileOrInput(ctx context.Context) error {
-	// Start off by attempting to use the provided signed operation.
-	if c.signedOperationInput != "" {
-		return c.obtainOperationFromInput(ctx)
+func (c *command) obtainOperationsFromFileOrInput(ctx context.Context) error {
+	// Start off by attempting to use the provided signed operations.
+	if c.signedOperationsInput != "" {
+		return c.obtainOperationsFromInput(ctx)
 	}
 	// If not, read it from the file with the standard name.
-	return c.obtainOperationFromFile(ctx)
+	return c.obtainOperationsFromFile(ctx)
 }
 
-func (c *command) obtainOperationFromFile(ctx context.Context) error {
-	_, err := os.Stat(exitOperationFilename)
+func (c *command) obtainOperationsFromFile(ctx context.Context) error {
+	_, err := os.Stat(exitOperationsFilename)
 	if err != nil {
-		return errors.Wrap(err, "failed to read exit operation file")
+		return errors.Wrap(err, "failed to read exit operations file")
 	}
 	if c.debug {
-		fmt.Fprintf(os.Stderr, "%s found; loading operation\n", exitOperationFilename)
+		fmt.Fprintf(os.Stderr, "%s found; loading operations\n", exitOperationsFilename)
 	}
-	data, err := os.ReadFile(exitOperationFilename)
+	data, err := os.ReadFile(exitOperationsFilename)
 	if err != nil {
-		return errors.Wrap(err, "failed to read exit operation file")
+		return errors.Wrap(err, "failed to read exit operations file")
 	}
-	if err := json.Unmarshal(data, &c.signedOperation); err != nil {
-		return errors.Wrap(err, "failed to parse exit operation file")
+	if err := json.Unmarshal(data, &c.signedOperations); err != nil {
+		return errors.Wrap(err, "failed to parse exit operations file")
 	}
 
-	return c.verifySignedOperation(ctx, c.signedOperation)
+	return c.verifySignedOperations(ctx)
 }
 
-func (c *command) obtainOperationFromInput(ctx context.Context) error {
-	if !strings.HasPrefix(c.signedOperationInput, "{") {
+func (c *command) obtainOperationsFromInput(ctx context.Context) error {
+	if !strings.HasPrefix(c.signedOperationsInput, "{") &&
+		!strings.HasPrefix(c.signedOperationsInput, "[") {
 		// This looks like a file; read it in.
-		data, err := os.ReadFile(c.signedOperationInput)
+		data, err := os.ReadFile(c.signedOperationsInput)
 		if err != nil {
 			return errors.Wrap(err, "failed to read input file")
 		}
-		c.signedOperationInput = string(data)
+		c.signedOperationsInput = string(data)
 	}
 
-	if err := json.Unmarshal([]byte(c.signedOperationInput), &c.signedOperation); err != nil {
+	if strings.HasPrefix(c.signedOperationsInput, "{") {
+		// Single operation; put it in an array.
+		c.signedOperationsInput = fmt.Sprintf("[%s]", c.signedOperationsInput)
+	}
+
+	if err := json.Unmarshal([]byte(c.signedOperationsInput), &c.signedOperations); err != nil {
 		return errors.Wrap(err, "failed to parse exit operation input")
 	}
 
-	return c.verifySignedOperation(ctx, c.signedOperation)
+	return c.verifySignedOperations(ctx)
 }
 
 func (c *command) generateOperationFromSeedAndPath(ctx context.Context,
+	validators map[string]*beacon.ValidatorInfo,
 	seed []byte,
 	path string,
-) error {
+) (
+	bool,
+	error,
+) {
 	validatorPrivkey, err := ethutil.PrivateKeyFromSeedAndPath(seed, path)
 	if err != nil {
-		return errors.Wrap(err, "failed to generate validator private key")
+		return false, errors.Wrap(err, "failed to generate validator private key")
 	}
 
-	c.privateKey = fmt.Sprintf("%#x", validatorPrivkey.Marshal())
-	return c.generateOperationFromPrivateKey(ctx)
+	privateKey := fmt.Sprintf("%#x", validatorPrivkey.Marshal())
+
+	validatorInfo, exists := validators[fmt.Sprintf("%#x", validatorPrivkey.PublicKey().Marshal())]
+	if !exists {
+		return false, errors.New("unknown validator")
+	}
+	if validatorInfo.State == apiv1.ValidatorStateActiveExiting ||
+		validatorInfo.State == apiv1.ValidatorStateActiveSlashed ||
+		validatorInfo.State == apiv1.ValidatorStateExitedUnslashed ||
+		validatorInfo.State == apiv1.ValidatorStateExitedSlashed ||
+		validatorInfo.State == apiv1.ValidatorStateWithdrawalPossible ||
+		validatorInfo.State == apiv1.ValidatorStateWithdrawalDone {
+		return false, fmt.Errorf("validator is in state %v, not suitable to generate an exit", validatorInfo.State)
+	}
+
+	validatorAccount, err := util.ParseAccount(ctx, privateKey, nil, true)
+	if err != nil {
+		if c.debug {
+			fmt.Fprintf(os.Stderr, "no validator found at path %s: %v\n", path, err)
+		}
+		return false, nil
+	}
+	if validatorAccount == nil {
+		return false, nil
+	}
+
+	if err := c.generateOperationFromAccount(ctx, validatorAccount); err != nil {
+		if c.debug {
+			fmt.Fprintf(os.Stderr, "failed to generate operation at path %s: %v\n", path, err)
+		}
+		return false, nil
+	}
+
+	return true, nil
 }
 
 func (c *command) generateOperationFromAccount(ctx context.Context,
@@ -276,8 +381,40 @@ func (c *command) generateOperationFromAccount(ctx context.Context,
 		return err
 	}
 
-	c.signedOperation, err = c.createSignedOperation(ctx, info, account, c.chainInfo.Epoch)
-	return err
+	epoch, err := c.selectEpoch()
+	if err != nil {
+		return err
+	}
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "Using %d for epoch\n", epoch)
+	}
+
+	signedOperation, err := c.createSignedOperation(ctx, info, account, epoch)
+	if err != nil {
+		return err
+	}
+	c.signedOperations = append(c.signedOperations, signedOperation)
+
+	return nil
+}
+
+func (c *command) selectEpoch() (phase0.Epoch, error) {
+	if c.epoch == "" {
+		// No user-supplied epoch; use the one from chain info.
+		return c.chainInfo.Epoch, nil
+	}
+
+	epoch, err := strconv.ParseInt(c.epoch, 10, 64)
+	if err != nil {
+		return 0, errors.New("epoch invalid")
+	}
+
+	if epoch < 0 {
+		// Relative epoch.
+		return c.chainInfo.Epoch - phase0.Epoch(-epoch), nil
+	}
+
+	return phase0.Epoch(epoch), nil
 }
 
 func (c *command) createSignedOperation(ctx context.Context,
@@ -322,6 +459,15 @@ func (c *command) createSignedOperation(ctx context.Context,
 	}, nil
 }
 
+func (c *command) verifySignedOperations(ctx context.Context) error {
+	for _, op := range c.signedOperations {
+		if err := c.verifySignedOperation(ctx, op); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
 func (c *command) verifySignedOperation(ctx context.Context, op *phase0.SignedVoluntaryExit) error {
 	root, err := op.Message.HashTreeRoot()
 	if err != nil {
@@ -366,14 +512,26 @@ func (c *command) verifySignedOperation(ctx context.Context, op *phase0.SignedVo
 	return nil
 }
 
+func (c *command) validateOperations(ctx context.Context) (bool, string) {
+	for _, op := range c.signedOperations {
+		valid, issue := c.validateOperation(ctx, op)
+		if !valid {
+			return valid, issue
+		}
+	}
+
+	return true, ""
+}
+
 func (c *command) validateOperation(_ context.Context,
+	op *phase0.SignedVoluntaryExit,
 ) (
 	bool,
 	string,
 ) {
 	var validatorInfo *beacon.ValidatorInfo
 	for _, chainValidatorInfo := range c.chainInfo.Validators {
-		if chainValidatorInfo.Index == c.signedOperation.Message.ValidatorIndex {
+		if chainValidatorInfo.Index == op.Message.ValidatorIndex {
 			validatorInfo = chainValidatorInfo
 			break
 		}
@@ -382,7 +540,7 @@ func (c *command) validateOperation(_ context.Context,
 		return false, "validator not known on chain"
 	}
 	if c.debug {
-		fmt.Fprintf(os.Stderr, "Validator exit operation: %v", c.signedOperation)
+		fmt.Fprintf(os.Stderr, "Validator exit operation: %v", op)
 		fmt.Fprintf(os.Stderr, "On-chain validator info: %v\n", validatorInfo)
 	}
 
@@ -398,8 +556,20 @@ func (c *command) validateOperation(_ context.Context,
 	return true, ""
 }
 
-func (c *command) broadcastOperation(ctx context.Context) error {
-	return c.consensusClient.(consensusclient.VoluntaryExitSubmitter).SubmitVoluntaryExit(ctx, c.signedOperation)
+func (c *command) broadcastOperations(ctx context.Context) error {
+	for _, op := range c.signedOperations {
+		if c.debug {
+			data, err := json.Marshal(op)
+			if err != nil {
+				fmt.Fprintf(os.Stderr, "Broadcasting %s\n", string(data))
+			}
+		}
+		if err := c.consensusClient.(consensusclient.VoluntaryExitSubmitter).SubmitVoluntaryExit(ctx, op); err != nil {
+			return err
+		}
+	}
+
+	return nil
 }
 
 func (c *command) setup(ctx context.Context) error {
@@ -429,7 +599,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	// Set up chaintime.
 	c.chainTime, err = standardchaintime.New(ctx,
-		standardchaintime.WithGenesisTimeProvider(c.consensusClient.(consensusclient.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.consensusClient.(consensusclient.GenesisProvider)),
 		standardchaintime.WithSpecProvider(c.consensusClient.(consensusclient.SpecProvider)),
 	)
 	if err != nil {
@@ -444,7 +614,7 @@ func (c *command) generateDomain(ctx context.Context) error {
 	if err != nil {
 		return err
 	}
-	forkVersion, err := c.obtainForkVersion(ctx)
+	forkVersion, err := c.obtainExitForkVersion(ctx)
 	if err != nil {
 		return err
 	}
@@ -491,10 +661,11 @@ func (c *command) obtainGenesisValidatorsRoot(_ context.Context) (phase0.Root, e
 	if c.debug {
 		fmt.Fprintf(os.Stderr, "Using genesis validators root %#x\n", genesisValidatorsRoot)
 	}
+
 	return genesisValidatorsRoot, nil
 }
 
-func (c *command) obtainForkVersion(_ context.Context) (phase0.Version, error) {
+func (c *command) obtainExitForkVersion(_ context.Context) (phase0.Version, error) {
 	forkVersion := phase0.Version{}
 
 	if c.forkVersion != "" {
@@ -513,12 +684,13 @@ func (c *command) obtainForkVersion(_ context.Context) (phase0.Version, error) {
 		if c.debug {
 			fmt.Fprintf(os.Stderr, "Fork version obtained from chain info\n")
 		}
-		// Use the current fork version for generating an exit as per the spec.
-		copy(forkVersion[:], c.chainInfo.CurrentForkVersion[:])
+		// Use the Capella fork version for generating an exit as per the spec.
+		copy(forkVersion[:], c.chainInfo.ExitForkVersion[:])
 	}
 
 	if c.debug {
 		fmt.Fprintf(os.Stderr, "Using fork version %#x\n", forkVersion)
 	}
+
 	return forkVersion, nil
 }

cmd/validator/exit/process_internal_test.go

@@ -17,6 +17,7 @@ import (
 	"context"
 	"testing"
 
+	apiv1 "github.com/attestantio/go-eth2-client/api/v1"
 	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/stretchr/testify/require"
 	"github.com/wealdtech/ethdo/beacon"
@@ -95,7 +96,7 @@ func TestGenerateOperationFromMnemonicAndPath(t *testing.T) {
 				require.EqualError(t, err, test.err)
 			} else {
 				require.NoError(t, err)
-				require.Equal(t, test.expected, test.command.signedOperation)
+				require.Equal(t, test.expected, test.command.signedOperations[0])
 			}
 		})
 	}
@@ -187,7 +188,7 @@ func TestGenerateOperationFromMnemonicAndValidator(t *testing.T) {
 				require.EqualError(t, err, test.err)
 			} else {
 				require.NoError(t, err)
-				require.Equal(t, test.expected, test.command.signedOperation)
+				require.Equal(t, test.expected, test.command.signedOperations[0])
 			}
 		})
 	}
@@ -198,29 +199,44 @@ func TestGenerateOperationFromSeedAndPath(t *testing.T) {
 
 	require.NoError(t, e2types.InitBLS())
 
+	validator0 := &beacon.ValidatorInfo{
+		Index:                 0,
+		Pubkey:                phase0.BLSPubKey{0xb3, 0x84, 0xf7, 0x67, 0xd9, 0x64, 0xe1, 0x00, 0xc8, 0xa9, 0xb2, 0x10, 0x18, 0xd0, 0x8c, 0x25, 0xff, 0xeb, 0xae, 0x26, 0x8b, 0x3a, 0xb6, 0xd6, 0x10, 0x35, 0x38, 0x97, 0x54, 0x19, 0x71, 0x72, 0x6d, 0xbf, 0xc3, 0xc7, 0x46, 0x38, 0x84, 0xc6, 0x8a, 0x53, 0x15, 0x15, 0xaa, 0xb9, 0x4c, 0x87},
+		WithdrawalCredentials: []byte{0x00, 0x8b, 0xa1, 0xcc, 0x4b, 0x09, 0x1b, 0x91, 0xc1, 0x20, 0x2b, 0xba, 0x3f, 0x50, 0x80, 0x75, 0xd6, 0xff, 0x56, 0x5c, 0x77, 0xe5, 0x59, 0xf0, 0x80, 0x3c, 0x07, 0x92, 0xe0, 0x30, 0x2b, 0xf1},
+		State:                 apiv1.ValidatorStateActiveOngoing,
+	}
+	validator1 := &beacon.ValidatorInfo{
+		Index:                 1,
+		Pubkey:                phase0.BLSPubKey{0xb3, 0xd8, 0x9e, 0x2f, 0x29, 0xc7, 0x12, 0xc6, 0xa9, 0xf8, 0xe5, 0xa2, 0x69, 0xb9, 0x76, 0x17, 0xc4, 0xa9, 0x4d, 0xd6, 0xf6, 0x66, 0x2a, 0xb3, 0xb0, 0x7c, 0xe9, 0xe5, 0x43, 0x45, 0x73, 0xf1, 0x5b, 0x5c, 0x98, 0x8c, 0xd1, 0x4b, 0xbd, 0x58, 0x04, 0xf7, 0x71, 0x56, 0xa8, 0xaf, 0x1c, 0xfa},
+		WithdrawalCredentials: []byte{0x00, 0x78, 0x6c, 0xb0, 0x2e, 0xd2, 0x8e, 0x5f, 0xbb, 0x1f, 0x7f, 0x9e, 0x93, 0x1a, 0x2b, 0x72, 0x69, 0x29, 0x06, 0xe6, 0xb1, 0x2c, 0xe4, 0x64, 0x39, 0x75, 0xe3, 0x2b, 0x51, 0x76, 0x91, 0xf2},
+		State:                 apiv1.ValidatorStateActiveOngoing,
+	}
+	validator2 := &beacon.ValidatorInfo{
+		Index:                 2,
+		Pubkey:                phase0.BLSPubKey{0xaf, 0x9c, 0xe4, 0x4f, 0x50, 0x14, 0x8d, 0xb4, 0x12, 0x19, 0x4a, 0xf0, 0xba, 0xf0, 0xba, 0xb3, 0x6b, 0xd5, 0xc3, 0xe0, 0xc4, 0x93, 0x89, 0x11, 0xa4, 0xe5, 0x02, 0xe3, 0x98, 0xb5, 0x9e, 0x5c, 0xca, 0x7c, 0x78, 0xe3, 0xfe, 0x03, 0x41, 0x95, 0x47, 0x88, 0x79, 0xee, 0xb2, 0x3d, 0xb0, 0xa6},
+		WithdrawalCredentials: []byte{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x93, 0x1a, 0x2b, 0x72, 0x69, 0x29, 0x06, 0xe6, 0xb1, 0x2c, 0xe4, 0x64, 0x39, 0x75, 0xe3, 0x2b, 0x51, 0x76, 0x91, 0xf2},
+		State:                 apiv1.ValidatorStateActiveOngoing,
+	}
+	validator3 := &beacon.ValidatorInfo{
+		Index:                 3,
+		Pubkey:                phase0.BLSPubKey{0x86, 0xd3, 0x30, 0xaf, 0x51, 0xfa, 0x59, 0x3f, 0xa9, 0xf9, 0x3e, 0xdb, 0x9d, 0x16, 0x64, 0x01, 0x86, 0xbe, 0x2e, 0x93, 0xea, 0x94, 0xd2, 0x59, 0x78, 0x1e, 0x1e, 0xb3, 0x4d, 0xeb, 0x84, 0x4c, 0x39, 0x68, 0xd7, 0x5e, 0xa9, 0x1d, 0x19, 0xf1, 0x59, 0xdb, 0xd0, 0x52, 0x3c, 0x6c, 0x5b, 0xa5},
+		WithdrawalCredentials: []byte{0x00, 0x81, 0x68, 0x45, 0x6b, 0x6d, 0x9a, 0x32, 0x83, 0x93, 0x1f, 0xea, 0x52, 0x10, 0xda, 0x12, 0x2d, 0x1e, 0x65, 0xe8, 0xed, 0x50, 0xb8, 0xe8, 0xf5, 0x91, 0x11, 0x83, 0xb0, 0x2f, 0xd1, 0x25},
+		State:                 apiv1.ValidatorStateActiveOngoing,
+	}
+
+	validators := map[string]*beacon.ValidatorInfo{
+		"0xb384f767d964e100c8a9b21018d08c25ffebae268b3ab6d610353897541971726dbfc3c7463884c68a531515aab94c87": validator0,
+		"0xb3d89e2f29c712c6a9f8e5a269b97617c4a94dd6f6662ab3b07ce9e5434573f15b5c988cd14bbd5804f77156a8af1cfa": validator1,
+		"0xaf9ce44f50148db412194af0baf0bab36bd5c3e0c4938911a4e502e398b59e5cca7c78e3fe034195478879eeb23db0a6": validator2,
+		"0x86d330af51fa593fa9f93edb9d16640186be2e93ea94d259781e1eb34deb844c3968d75ea91d19f159dbd0523c6c5ba5": validator3,
+	}
 	chainInfo := &beacon.ChainInfo{
 		Version: 1,
 		Validators: []*beacon.ValidatorInfo{
-			{
-				Index:                 0,
-				Pubkey:                phase0.BLSPubKey{0xb3, 0x84, 0xf7, 0x67, 0xd9, 0x64, 0xe1, 0x00, 0xc8, 0xa9, 0xb2, 0x10, 0x18, 0xd0, 0x8c, 0x25, 0xff, 0xeb, 0xae, 0x26, 0x8b, 0x3a, 0xb6, 0xd6, 0x10, 0x35, 0x38, 0x97, 0x54, 0x19, 0x71, 0x72, 0x6d, 0xbf, 0xc3, 0xc7, 0x46, 0x38, 0x84, 0xc6, 0x8a, 0x53, 0x15, 0x15, 0xaa, 0xb9, 0x4c, 0x87},
-				WithdrawalCredentials: []byte{0x00, 0x8b, 0xa1, 0xcc, 0x4b, 0x09, 0x1b, 0x91, 0xc1, 0x20, 0x2b, 0xba, 0x3f, 0x50, 0x80, 0x75, 0xd6, 0xff, 0x56, 0x5c, 0x77, 0xe5, 0x59, 0xf0, 0x80, 0x3c, 0x07, 0x92, 0xe0, 0x30, 0x2b, 0xf1},
-			},
-			{
-				Index:                 1,
-				Pubkey:                phase0.BLSPubKey{0xb3, 0xd8, 0x9e, 0x2f, 0x29, 0xc7, 0x12, 0xc6, 0xa9, 0xf8, 0xe5, 0xa2, 0x69, 0xb9, 0x76, 0x17, 0xc4, 0xa9, 0x4d, 0xd6, 0xf6, 0x66, 0x2a, 0xb3, 0xb0, 0x7c, 0xe9, 0xe5, 0x43, 0x45, 0x73, 0xf1, 0x5b, 0x5c, 0x98, 0x8c, 0xd1, 0x4b, 0xbd, 0x58, 0x04, 0xf7, 0x71, 0x56, 0xa8, 0xaf, 0x1c, 0xfa},
-				WithdrawalCredentials: []byte{0x00, 0x78, 0x6c, 0xb0, 0x2e, 0xd2, 0x8e, 0x5f, 0xbb, 0x1f, 0x7f, 0x9e, 0x93, 0x1a, 0x2b, 0x72, 0x69, 0x29, 0x06, 0xe6, 0xb1, 0x2c, 0xe4, 0x64, 0x39, 0x75, 0xe3, 0x2b, 0x51, 0x76, 0x91, 0xf2},
-			},
-			{
-				Index:                 2,
-				Pubkey:                phase0.BLSPubKey{0xaf, 0x9c, 0xe4, 0x4f, 0x50, 0x14, 0x8d, 0xb4, 0x12, 0x19, 0x4a, 0xf0, 0xba, 0xf0, 0xba, 0xb3, 0x6b, 0xd5, 0xc3, 0xe0, 0xc4, 0x93, 0x89, 0x11, 0xa4, 0xe5, 0x02, 0xe3, 0x98, 0xb5, 0x9e, 0x5c, 0xca, 0x7c, 0x78, 0xe3, 0xfe, 0x03, 0x41, 0x95, 0x47, 0x88, 0x79, 0xee, 0xb2, 0x3d, 0xb0, 0xa6},
-				WithdrawalCredentials: []byte{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x93, 0x1a, 0x2b, 0x72, 0x69, 0x29, 0x06, 0xe6, 0xb1, 0x2c, 0xe4, 0x64, 0x39, 0x75, 0xe3, 0x2b, 0x51, 0x76, 0x91, 0xf2},
-			},
-			{
-				Index:                 3,
-				Pubkey:                phase0.BLSPubKey{0x86, 0xd3, 0x30, 0xaf, 0x51, 0xfa, 0x59, 0x3f, 0xa9, 0xf9, 0x3e, 0xdb, 0x9d, 0x16, 0x64, 0x01, 0x86, 0xbe, 0x2e, 0x93, 0xea, 0x94, 0xd2, 0x59, 0x78, 0x1e, 0x1e, 0xb3, 0x4d, 0xeb, 0x84, 0x4c, 0x39, 0x68, 0xd7, 0x5e, 0xa9, 0x1d, 0x19, 0xf1, 0x59, 0xdb, 0xd0, 0x52, 0x3c, 0x6c, 0x5b, 0xa5},
-				WithdrawalCredentials: []byte{0x00, 0x81, 0x68, 0x45, 0x6b, 0x6d, 0x9a, 0x32, 0x83, 0x93, 0x1f, 0xea, 0x52, 0x10, 0xda, 0x12, 0x2d, 0x1e, 0x65, 0xe8, 0xed, 0x50, 0xb8, 0xe8, 0xf5, 0x91, 0x11, 0x83, 0xb0, 0x2f, 0xd1, 0x25},
-			},
+			validator0,
+			validator1,
+			validator2,
+			validator3,
 		},
 		GenesisValidatorsRoot: phase0.Root{},
 		Epoch:                 1,
@@ -296,12 +312,14 @@ func TestGenerateOperationFromSeedAndPath(t *testing.T) {
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			err := test.command.generateOperationFromSeedAndPath(ctx, test.seed, test.path)
+			found, err := test.command.generateOperationFromSeedAndPath(ctx, validators, test.seed, test.path)
 			if test.err != "" {
+				require.False(t, found)
 				require.EqualError(t, err, test.err)
 			} else {
 				require.NoError(t, err)
-				require.Equal(t, test.expected, test.command.signedOperation)
+				require.True(t, found)
+				require.Equal(t, test.expected, test.command.signedOperations[0])
 			}
 		})
 	}
@@ -340,10 +358,12 @@ func TestVerifyOperation(t *testing.T) {
 			name: "SignatureMissing",
 			command: &command{
 				chainInfo: chainInfo,
-				signedOperation: &phase0.SignedVoluntaryExit{
-					Message: &phase0.VoluntaryExit{
-						Epoch:          1,
-						ValidatorIndex: 0,
+				signedOperations: []*phase0.SignedVoluntaryExit{
+					{
+						Message: &phase0.VoluntaryExit{
+							Epoch:          1,
+							ValidatorIndex: 0,
+						},
 					},
 				},
 			},
@@ -353,12 +373,14 @@ func TestVerifyOperation(t *testing.T) {
 			name: "SignatureShort",
 			command: &command{
 				chainInfo: chainInfo,
-				signedOperation: &phase0.SignedVoluntaryExit{
-					Message: &phase0.VoluntaryExit{
-						Epoch:          1,
-						ValidatorIndex: 0,
+				signedOperations: []*phase0.SignedVoluntaryExit{
+					{
+						Message: &phase0.VoluntaryExit{
+							Epoch:          1,
+							ValidatorIndex: 0,
+						},
+						Signature: phase0.BLSSignature{0xf5, 0xc4, 0x42, 0x88, 0xf9, 0x5e, 0x19, 0xb6, 0xc1, 0x39, 0xf2, 0x62, 0x30, 0x05, 0x66, 0x5b, 0x98, 0x34, 0x62, 0xa2, 0x28, 0x12, 0x09, 0x77, 0xd8, 0x1f, 0x2e, 0xf5, 0x47, 0x56, 0x0b, 0xe2, 0x24, 0x46, 0xde, 0x21, 0xa8, 0xa9, 0x37, 0xd9, 0xdd, 0xa4, 0xe2, 0xd2, 0xec, 0x41, 0x75, 0x19, 0x64, 0x96, 0xcd, 0xd1, 0x30, 0x6d, 0xec, 0x4a, 0x12, 0x5f, 0x8c, 0x86, 0x1f, 0x80, 0x61, 0x71, 0x50, 0x4a, 0x9d, 0x6a, 0x61, 0x0e, 0xc4, 0xe1, 0x35, 0x04, 0x7e, 0x4f, 0xb6, 0x70, 0x52, 0xec, 0xc4, 0x56, 0x13, 0x60, 0xd0, 0xc3, 0xde, 0x04, 0xb6, 0xfb, 0xc4, 0x47, 0x42, 0x23, 0xff},
 					},
-					Signature: phase0.BLSSignature{0xf5, 0xc4, 0x42, 0x88, 0xf9, 0x5e, 0x19, 0xb6, 0xc1, 0x39, 0xf2, 0x62, 0x30, 0x05, 0x66, 0x5b, 0x98, 0x34, 0x62, 0xa2, 0x28, 0x12, 0x09, 0x77, 0xd8, 0x1f, 0x2e, 0xf5, 0x47, 0x56, 0x0b, 0xe2, 0x24, 0x46, 0xde, 0x21, 0xa8, 0xa9, 0x37, 0xd9, 0xdd, 0xa4, 0xe2, 0xd2, 0xec, 0x41, 0x75, 0x19, 0x64, 0x96, 0xcd, 0xd1, 0x30, 0x6d, 0xec, 0x4a, 0x12, 0x5f, 0x8c, 0x86, 0x1f, 0x80, 0x61, 0x71, 0x50, 0x4a, 0x9d, 0x6a, 0x61, 0x0e, 0xc4, 0xe1, 0x35, 0x04, 0x7e, 0x4f, 0xb6, 0x70, 0x52, 0xec, 0xc4, 0x56, 0x13, 0x60, 0xd0, 0xc3, 0xde, 0x04, 0xb6, 0xfb, 0xc4, 0x47, 0x42, 0x23, 0xff},
 				},
 			},
 			err: "invalid signature",
@@ -367,12 +389,14 @@ func TestVerifyOperation(t *testing.T) {
 			name: "SignatureIncorrect",
 			command: &command{
 				chainInfo: chainInfo,
-				signedOperation: &phase0.SignedVoluntaryExit{
-					Message: &phase0.VoluntaryExit{
-						Epoch:          1,
-						ValidatorIndex: 0,
+				signedOperations: []*phase0.SignedVoluntaryExit{
+					{
+						Message: &phase0.VoluntaryExit{
+							Epoch:          1,
+							ValidatorIndex: 0,
+						},
+						Signature: phase0.BLSSignature{0x99, 0x78, 0xb4, 0x9c, 0x21, 0x60, 0x3f, 0x04, 0xa3, 0x04, 0x4e, 0x4c, 0x49, 0x0c, 0xb4, 0x68, 0x7c, 0x6e, 0x14, 0xc2, 0xda, 0xed, 0x25, 0x92, 0xe0, 0x02, 0x2d, 0xcd, 0x63, 0xeb, 0xe7, 0x4a, 0xf1, 0x1a, 0xca, 0xba, 0xae, 0x50, 0xe1, 0x8a, 0x1d, 0xae, 0x96, 0xd9, 0xd2, 0x56, 0xbf, 0x9f, 0x02, 0x48, 0x85, 0x05, 0xc1, 0xfb, 0xb3, 0x4a, 0x0b, 0x68, 0xec, 0xc5, 0xb5, 0xf5, 0xea, 0x53, 0xdb, 0xd0, 0x09, 0x08, 0xe3, 0x1e, 0xa8, 0xca, 0x9d, 0x02, 0x08, 0x3b, 0x9e, 0xf1, 0xc7, 0xd2, 0x32, 0xf4, 0xba, 0xd9, 0xea, 0x56, 0x4b, 0xc5, 0x87, 0xd5, 0x27, 0xb7, 0x74, 0x97, 0x8a, 0xee},
 					},
-					Signature: phase0.BLSSignature{0x99, 0x78, 0xb4, 0x9c, 0x21, 0x60, 0x3f, 0x04, 0xa3, 0x04, 0x4e, 0x4c, 0x49, 0x0c, 0xb4, 0x68, 0x7c, 0x6e, 0x14, 0xc2, 0xda, 0xed, 0x25, 0x92, 0xe0, 0x02, 0x2d, 0xcd, 0x63, 0xeb, 0xe7, 0x4a, 0xf1, 0x1a, 0xca, 0xba, 0xae, 0x50, 0xe1, 0x8a, 0x1d, 0xae, 0x96, 0xd9, 0xd2, 0x56, 0xbf, 0x9f, 0x02, 0x48, 0x85, 0x05, 0xc1, 0xfb, 0xb3, 0x4a, 0x0b, 0x68, 0xec, 0xc5, 0xb5, 0xf5, 0xea, 0x53, 0xdb, 0xd0, 0x09, 0x08, 0xe3, 0x1e, 0xa8, 0xca, 0x9d, 0x02, 0x08, 0x3b, 0x9e, 0xf1, 0xc7, 0xd2, 0x32, 0xf4, 0xba, 0xd9, 0xea, 0x56, 0x4b, 0xc5, 0x87, 0xd5, 0x27, 0xb7, 0x74, 0x97, 0x8a, 0xee},
 				},
 			},
 			err: "signature does not verify",
@@ -383,12 +407,14 @@ func TestVerifyOperation(t *testing.T) {
 				mnemonic:  "abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art",
 				validator: "0",
 				chainInfo: chainInfo,
-				signedOperation: &phase0.SignedVoluntaryExit{
-					Message: &phase0.VoluntaryExit{
-						Epoch:          1,
-						ValidatorIndex: 0,
+				signedOperations: []*phase0.SignedVoluntaryExit{
+					{
+						Message: &phase0.VoluntaryExit{
+							Epoch:          1,
+							ValidatorIndex: 0,
+						},
+						Signature: phase0.BLSSignature{0x89, 0xf5, 0xc4, 0x42, 0x88, 0xf9, 0x5e, 0x19, 0xb6, 0xc1, 0x39, 0xf2, 0x62, 0x30, 0x05, 0x66, 0x5b, 0x98, 0x34, 0x62, 0xa2, 0x28, 0x12, 0x09, 0x77, 0xd8, 0x1f, 0x2e, 0xf5, 0x47, 0x56, 0x0b, 0xe2, 0x24, 0x46, 0xde, 0x21, 0xa8, 0xa9, 0x37, 0xd9, 0xdd, 0xa4, 0xe2, 0xd2, 0xec, 0x41, 0x75, 0x19, 0x64, 0x96, 0xcd, 0xd1, 0x30, 0x6d, 0xec, 0x4a, 0x12, 0x5f, 0x8c, 0x86, 0x1f, 0x80, 0x61, 0x71, 0x50, 0x4a, 0x9d, 0x6a, 0x61, 0x0e, 0xc4, 0xe1, 0x35, 0x04, 0x7e, 0x4f, 0xb6, 0x70, 0x52, 0xec, 0xc4, 0x56, 0x13, 0x60, 0xd0, 0xc3, 0xde, 0x04, 0xb6, 0xfb, 0xc4, 0x47, 0x42, 0x23, 0xff},
 					},
-					Signature: phase0.BLSSignature{0x89, 0xf5, 0xc4, 0x42, 0x88, 0xf9, 0x5e, 0x19, 0xb6, 0xc1, 0x39, 0xf2, 0x62, 0x30, 0x05, 0x66, 0x5b, 0x98, 0x34, 0x62, 0xa2, 0x28, 0x12, 0x09, 0x77, 0xd8, 0x1f, 0x2e, 0xf5, 0x47, 0x56, 0x0b, 0xe2, 0x24, 0x46, 0xde, 0x21, 0xa8, 0xa9, 0x37, 0xd9, 0xdd, 0xa4, 0xe2, 0xd2, 0xec, 0x41, 0x75, 0x19, 0x64, 0x96, 0xcd, 0xd1, 0x30, 0x6d, 0xec, 0x4a, 0x12, 0x5f, 0x8c, 0x86, 0x1f, 0x80, 0x61, 0x71, 0x50, 0x4a, 0x9d, 0x6a, 0x61, 0x0e, 0xc4, 0xe1, 0x35, 0x04, 0x7e, 0x4f, 0xb6, 0x70, 0x52, 0xec, 0xc4, 0x56, 0x13, 0x60, 0xd0, 0xc3, 0xde, 0x04, 0xb6, 0xfb, 0xc4, 0x47, 0x42, 0x23, 0xff},
 				},
 			},
 		},
@@ -396,7 +422,7 @@ func TestVerifyOperation(t *testing.T) {
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			err := test.command.verifySignedOperation(ctx, test.command.signedOperation)
+			err := test.command.verifySignedOperation(ctx, test.command.signedOperations[0])
 			if test.err != "" {
 				require.EqualError(t, err, test.err)
 			} else {
@@ -438,39 +464,39 @@ func TestObtainOperationFromInput(t *testing.T) {
 		{
 			name: "InvalidFilename",
 			command: &command{
-				signedOperationInput: `[]`,
-				chainInfo:            chainInfo,
+				signedOperationsInput: `missing.json`,
+				chainInfo:             chainInfo,
 			},
-			err: "failed to read input file: open []: no such file or directory",
+			err: "failed to read input file: open missing.json: no such file or directory",
 		},
 		{
 			name: "InvalidJSON",
 			command: &command{
-				signedOperationInput: `{invalid}`,
-				chainInfo:            chainInfo,
+				signedOperationsInput: `{invalid}`,
+				chainInfo:             chainInfo,
 			},
 			err: "failed to parse exit operation input: invalid character 'i' looking for beginning of object key string",
 		},
 		{
 			name: "Unverifable",
 			command: &command{
-				signedOperationInput: `{"message":{"epoch":"1","validator_index":"0"},"signature":"0x9978b49c21603f04a3044e4c490cb4687c6e14c2daed2592e0022dcd63ebe74af11acabaae50e18a1dae96d9d256bf9f02488505c1fbb34a0b68ecc5b5f5ea53dbd00908e31ea8ca9d02083b9ef1c7d232f4bad9ea564bc587d527b774978aee"}`,
-				chainInfo:            chainInfo,
+				signedOperationsInput: `{"message":{"epoch":"1","validator_index":"0"},"signature":"0x9978b49c21603f04a3044e4c490cb4687c6e14c2daed2592e0022dcd63ebe74af11acabaae50e18a1dae96d9d256bf9f02488505c1fbb34a0b68ecc5b5f5ea53dbd00908e31ea8ca9d02083b9ef1c7d232f4bad9ea564bc587d527b774978aee"}`,
+				chainInfo:             chainInfo,
 			},
 			err: "signature does not verify",
 		},
 		{
 			name: "Good",
 			command: &command{
-				signedOperationInput: `{"message":{"epoch":"1","validator_index":"0"},"signature":"0x89f5c44288f95e19b6c139f2623005665b983462a228120977d81f2ef547560be22446de21a8a937d9dda4e2d2ec4175196496cdd1306dec4a125f8c861f806171504a9d6a610ec4e135047e4fb67052ecc4561360d0c3de04b6fbc4474223ff"}`,
-				chainInfo:            chainInfo,
+				signedOperationsInput: `{"message":{"epoch":"1","validator_index":"0"},"signature":"0x89f5c44288f95e19b6c139f2623005665b983462a228120977d81f2ef547560be22446de21a8a937d9dda4e2d2ec4175196496cdd1306dec4a125f8c861f806171504a9d6a610ec4e135047e4fb67052ecc4561360d0c3de04b6fbc4474223ff"}`,
+				chainInfo:             chainInfo,
 			},
 		},
 	}
 
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
-			err := test.command.obtainOperationFromInput(ctx)
+			err := test.command.obtainOperationsFromFileOrInput(ctx)
 			if test.err != "" {
 				require.EqualError(t, err, test.err)
 			} else {

cmd/validator/expectation/command.go

@@ -15,9 +15,12 @@ package validatorexpectation
 
 import (
 	"context"
+	"encoding/json"
+	"strconv"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/hako/durafmt"
 	"github.com/pkg/errors"
 	"github.com/spf13/viper"
 )
@@ -26,6 +29,7 @@ type command struct {
 	quiet   bool
 	verbose bool
 	debug   bool
+	json    bool
 
 	// Beacon node connection.
 	timeout                  time.Duration
@@ -38,18 +42,43 @@ type command struct {
 	// Data access.
 	eth2Client         eth2client.Service
 	validatorsProvider eth2client.ValidatorsProvider
-	activeValidators   int
 
-	// Output.
+	// Results.
+	res *results
+}
+
+type results struct {
+	activeValidators          uint64
 	timeBetweenProposals      time.Duration
 	timeBetweenSyncCommittees time.Duration
 }
 
+type resultsJSON struct {
+	ActiveValidators          string `json:"active_validators"`
+	TimeBetweenProposals      string `json:"time_between_proposals"`
+	SecsBetweenProposals      string `json:"secs_between_proposals"`
+	TimeBetweenSyncCommittees string `json:"time_between_sync_committees"`
+	SecsBetweenSyncCommittees string `json:"secs_between_sync_committees"`
+}
+
+func (r *results) MarshalJSON() ([]byte, error) {
+	data := &resultsJSON{
+		ActiveValidators:          strconv.FormatUint(r.activeValidators, 10),
+		TimeBetweenProposals:      durafmt.Parse(r.timeBetweenProposals).LimitFirstN(2).String(),
+		SecsBetweenProposals:      strconv.FormatInt(int64(r.timeBetweenProposals.Seconds()), 10),
+		TimeBetweenSyncCommittees: durafmt.Parse(r.timeBetweenSyncCommittees).LimitFirstN(2).String(),
+		SecsBetweenSyncCommittees: strconv.FormatInt(int64(r.timeBetweenSyncCommittees.Seconds()), 10),
+	}
+	return json.Marshal(data)
+}
+
 func newCommand(_ context.Context) (*command, error) {
 	c := &command{
 		quiet:   viper.GetBool("quiet"),
 		verbose: viper.GetBool("verbose"),
 		debug:   viper.GetBool("debug"),
+		json:    viper.GetBool("json"),
+		res:     &results{},
 	}
 
 	// Timeout.

cmd/validator/expectation/output.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading.
+// Copyright © 2021, 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
@@ -15,24 +15,42 @@ package validatorexpectation
 
 import (
 	"context"
+	"encoding/json"
+	"fmt"
 	"strings"
 
 	"github.com/hako/durafmt"
 )
 
-func (c *command) output(_ context.Context) (string, error) {
+func (c *command) output(ctx context.Context) (string, error) {
 	if c.quiet {
 		return "", nil
 	}
 
+	if c.json {
+		return c.outputJSON(ctx)
+	}
+	return c.outputTxt(ctx)
+}
+
+func (c *command) outputJSON(_ context.Context) (string, error) {
+	data, err := json.Marshal(c.res)
+	if err != nil {
+		return "", err
+	}
+
+	return fmt.Sprintf("%s\n", string(data)), nil
+}
+
+func (c *command) outputTxt(_ context.Context) (string, error) {
 	builder := strings.Builder{}
 
 	builder.WriteString("Expected time between block proposals: ")
-	builder.WriteString(durafmt.Parse(c.timeBetweenProposals).LimitFirstN(2).String())
+	builder.WriteString(durafmt.Parse(c.res.timeBetweenProposals).LimitFirstN(2).String())
 	builder.WriteString("\n")
 
 	builder.WriteString("Expected time between sync committees: ")
-	builder.WriteString(durafmt.Parse(c.timeBetweenSyncCommittees).LimitFirstN(2).String())
+	builder.WriteString(durafmt.Parse(c.res.timeBetweenSyncCommittees).LimitFirstN(2).String())
 	builder.WriteString("\n")
 
 	return builder.String(), nil

cmd/validator/expectation/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading.
+// Copyright © 2021, 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
@@ -19,6 +19,7 @@ import (
 	"time"
 
 	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"
@@ -31,7 +32,7 @@ func (c *command) process(ctx context.Context) error {
 	}
 
 	if c.debug {
-		fmt.Printf("Active validators: %d\n", c.activeValidators)
+		fmt.Printf("Active validators: %d\n", c.res.activeValidators)
 	}
 
 	if err := c.calculateProposalChance(ctx); err != nil {
@@ -45,12 +46,12 @@ func (c *command) calculateProposalChance(ctx context.Context) error {
 	// Chance of proposing a block is 1/activeValidators.
 	// Expectation of number of slots before proposing a block is 1/p, == activeValidators slots.
 
-	spec, err := c.eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	specResponse, err := c.eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return err
 	}
 
-	tmp, exists := spec["SECONDS_PER_SLOT"]
+	tmp, exists := specResponse.Data["SECONDS_PER_SLOT"]
 	if !exists {
 		return errors.New("spec missing SECONDS_PER_SLOT")
 	}
@@ -59,7 +60,7 @@ func (c *command) calculateProposalChance(ctx context.Context) error {
 		return errors.New("SECONDS_PER_SLOT of incorrect type")
 	}
 
-	c.timeBetweenProposals = slotDuration * time.Duration(c.activeValidators) / time.Duration(c.validators)
+	c.res.timeBetweenProposals = slotDuration * time.Duration(c.res.activeValidators) / time.Duration(c.validators)
 
 	return nil
 }
@@ -68,12 +69,12 @@ func (c *command) calculateSyncCommitteeChance(ctx context.Context) error {
 	// Chance of being in a sync committee is SYNC_COMMITTEE_SIZE/activeValidators.
 	// Expectation of number of periods before being in a sync committee is 1/p, activeValidators/SYNC_COMMITTEE_SIZE periods.
 
-	spec, err := c.eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	specResponse, err := c.eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return err
 	}
 
-	tmp, exists := spec["SECONDS_PER_SLOT"]
+	tmp, exists := specResponse.Data["SECONDS_PER_SLOT"]
 	if !exists {
 		return errors.New("spec missing SECONDS_PER_SLOT")
 	}
@@ -82,7 +83,7 @@ func (c *command) calculateSyncCommitteeChance(ctx context.Context) error {
 		return errors.New("SECONDS_PER_SLOT of incorrect type")
 	}
 
-	tmp, exists = spec["SYNC_COMMITTEE_SIZE"]
+	tmp, exists = specResponse.Data["SYNC_COMMITTEE_SIZE"]
 	if !exists {
 		return errors.New("spec missing SYNC_COMMITTEE_SIZE")
 	}
@@ -91,7 +92,7 @@ func (c *command) calculateSyncCommitteeChance(ctx context.Context) error {
 		return errors.New("SYNC_COMMITTEE_SIZE of incorrect type")
 	}
 
-	tmp, exists = spec["SLOTS_PER_EPOCH"]
+	tmp, exists = specResponse.Data["SLOTS_PER_EPOCH"]
 	if !exists {
 		return errors.New("spec missing SLOTS_PER_EPOCH")
 	}
@@ -100,7 +101,7 @@ func (c *command) calculateSyncCommitteeChance(ctx context.Context) error {
 		return errors.New("SLOTS_PER_EPOCH of incorrect type")
 	}
 
-	tmp, exists = spec["EPOCHS_PER_SYNC_COMMITTEE_PERIOD"]
+	tmp, exists = specResponse.Data["EPOCHS_PER_SYNC_COMMITTEE_PERIOD"]
 	if !exists {
 		return errors.New("spec missing EPOCHS_PER_SYNC_COMMITTEE_PERIOD")
 	}
@@ -109,12 +110,12 @@ func (c *command) calculateSyncCommitteeChance(ctx context.Context) error {
 		return errors.New("EPOCHS_PER_SYNC_COMMITTEE_PERIOD of incorrect type")
 	}
 
-	periodsBetweenSyncCommittees := uint64(c.activeValidators) / syncCommitteeSize
+	periodsBetweenSyncCommittees := c.res.activeValidators / syncCommitteeSize
 	if c.debug {
 		fmt.Printf("Sync committee periods between inclusion: %d\n", periodsBetweenSyncCommittees)
 	}
 
-	c.timeBetweenSyncCommittees = slotDuration * time.Duration(slotsPerEpoch*epochsPerPeriod) * time.Duration(periodsBetweenSyncCommittees) / time.Duration(c.validators)
+	c.res.timeBetweenSyncCommittees = slotDuration * time.Duration(slotsPerEpoch*epochsPerPeriod) * time.Duration(periodsBetweenSyncCommittees) / time.Duration(c.validators)
 
 	return nil
 }
@@ -135,7 +136,7 @@ func (c *command) setup(ctx context.Context) error {
 
 	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")
@@ -148,16 +149,18 @@ func (c *command) setup(ctx context.Context) error {
 		return errors.New("connection does not provide validator information")
 	}
 
-	validators, err := c.validatorsProvider.Validators(ctx, "head", nil)
+	response, err := c.validatorsProvider.Validators(ctx, &api.ValidatorsOpts{
+		State: "head",
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain validators")
 	}
 
 	currentEpoch := chainTime.CurrentEpoch()
-	for _, validator := range validators {
+	for _, validator := range response.Data {
 		if validator.Validator.ActivationEpoch <= currentEpoch &&
 			validator.Validator.ExitEpoch > currentEpoch {
-			c.activeValidators++
+			c.res.activeValidators++
 		}
 	}
 

cmd/validator/keycheck/input.go

@@ -46,9 +46,9 @@ func input(_ context.Context) (*dataIn, error) {
 	}
 
 	data.mnemonic = viper.GetString("mnemonic")
-	data.privKey = viper.GetString("privkey")
+	data.privKey = viper.GetString("private-key")
 	if data.mnemonic == "" && data.privKey == "" {
-		return nil, errors.New("mnemonic or privkey is required")
+		return nil, errors.New("mnemonic or private key is required")
 	}
 
 	return data, nil

cmd/validator/keycheck/input_internal_test.go

@@ -38,7 +38,7 @@ func TestInput(t *testing.T) {
 			vars: map[string]interface{}{
 				"withdrawal-credentials": "0x007e28dcf9029e8d92ca4b5d01c66c934e7f3110606f34ae3052cbf67bd3fc02",
 			},
-			err: "mnemonic or privkey is required",
+			err: "mnemonic or private key is required",
 		},
 		{
 			name: "GoodWithMnemonic",

cmd/validator/summary/process.go

@@ -16,9 +16,11 @@ package validatorsummary
 import (
 	"context"
 	"fmt"
+	"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/phase0"
 	"github.com/pkg/errors"
@@ -27,6 +29,10 @@ import (
 )
 
 func (c *command) process(ctx context.Context) error {
+	if len(c.validators) == 0 {
+		return errors.New("no validators supplied")
+	}
+
 	// Obtain information we need to process.
 	err := c.setup(ctx)
 	if err != nil {
@@ -77,21 +83,28 @@ func (c *command) process(ctx context.Context) error {
 }
 
 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 {
+	for _, duty := range response.Data {
 		if _, exists := c.validatorsByIndex[duty.ValidatorIndex]; !exists {
 			continue
 		}
-		block, err := c.blocksProvider.SignedBeaconBlock(ctx, fmt.Sprintf("%d", duty.Slot))
+		blockResponse, err := c.blocksProvider.SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+			Block: fmt.Sprintf("%d", duty.Slot),
+		})
 		if err != nil {
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+				return nil
+			}
+
 			return errors.Wrap(err, fmt.Sprintf("failed to obtain block for slot %d", duty.Slot))
 		}
+		block := blockResponse.Data
 		present := block != nil
 		c.summary.Proposals = append(c.summary.Proposals, &epochProposal{
 			Slot:     duty.Slot,
@@ -129,10 +142,14 @@ func (c *command) processAttesterDuties(ctx context.Context) error {
 	}
 
 	// Obtain the duties for the validators to know where they should be attesting.
-	duties, err := c.attesterDutiesProvider.AttesterDuties(ctx, c.summary.Epoch, activeValidatorIndices)
+	dutiesResponse, err := c.attesterDutiesProvider.AttesterDuties(ctx, &api.AttesterDutiesOpts{
+		Epoch:   c.summary.Epoch,
+		Indices: activeValidatorIndices,
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain attester duties")
 	}
+	duties := dutiesResponse.Data
 	for slot := c.chainTime.FirstSlotOfEpoch(c.summary.Epoch); slot < c.chainTime.FirstSlotOfEpoch(c.summary.Epoch+1); slot++ {
 		index := int(slot - c.chainTime.FirstSlotOfEpoch(c.summary.Epoch))
 		c.summary.Slots[index].Attestations = &slotAttestations{}
@@ -209,14 +226,18 @@ func (c *command) processAttesterDutiesSlot(ctx context.Context,
 	headersCache *util.BeaconBlockHeaderCache,
 	activeValidatorIndices []phase0.ValidatorIndex,
 ) error {
-	block, err := c.blocksProvider.SignedBeaconBlock(ctx, fmt.Sprintf("%d", slot))
+	blockResponse, err := c.blocksProvider.SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+		Block: fmt.Sprintf("%d", slot),
+	})
 	if err != nil {
-		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.
-		return nil
+		var apiErr *api.Error
+		if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+			return nil
+		}
+
+		return errors.Wrap(err, "failed to obtain beacon block")
 	}
+	block := blockResponse.Data
 	attestations, err := block.Attestations()
 	if err != nil {
 		return err
@@ -389,7 +410,7 @@ 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/validator/withdrawal/process.go

@@ -20,8 +20,8 @@ import (
 	"time"
 
 	consensusclient "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/phase0"
 	"github.com/pkg/errors"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
@@ -49,10 +49,13 @@ func (c *command) process(ctx context.Context) error {
 		return errors.New("validator has nothing to withdraw")
 	}
 
-	block, err := c.consensusClient.(consensusclient.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, "head")
+	blockResponse, err := c.consensusClient.(consensusclient.SignedBeaconBlockProvider).SignedBeaconBlock(ctx, &api.SignedBeaconBlockOpts{
+		Block: "head",
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain block")
 	}
+	block := blockResponse.Data
 	slot, err := block.Slot()
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain block slot")
@@ -61,26 +64,25 @@ func (c *command) process(ctx context.Context) error {
 		fmt.Fprintf(os.Stderr, "Slot is %d\n", slot)
 	}
 
-	validatorsMap, err := c.consensusClient.(consensusclient.ValidatorsProvider).Validators(ctx, fmt.Sprintf("%d", slot), nil)
+	response, err := c.consensusClient.(consensusclient.ValidatorsProvider).Validators(ctx, &api.ValidatorsOpts{
+		State: fmt.Sprintf("%d", slot),
+	})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain validators")
 	}
-	validators := make([]*apiv1.Validator, len(validatorsMap))
-	for _, validator := range validatorsMap {
+	validators := make([]*apiv1.Validator, len(response.Data))
+	for _, validator := range response.Data {
 		validators[validator.Index] = validator
 	}
 
-	var nextWithdrawalValidatorIndex phase0.ValidatorIndex
-	switch block.Version {
-	case spec.DataVersionCapella:
-		withdrawals := block.Capella.Message.Body.ExecutionPayload.Withdrawals
-		if len(withdrawals) == 0 {
-			return errors.New("block without withdrawals; cannot obtain next withdrawal validator index")
-		}
-		nextWithdrawalValidatorIndex = phase0.ValidatorIndex((int(withdrawals[len(withdrawals)-1].ValidatorIndex) + 1) % len(validators))
-	default:
-		return fmt.Errorf("unhandled block version %v", block.Version)
+	withdrawals, err := block.Withdrawals()
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain withdrawals from block")
 	}
+	if len(withdrawals) == 0 {
+		return errors.New("block without withdrawals; cannot obtain next withdrawal validator index")
+	}
+	nextWithdrawalValidatorIndex := phase0.ValidatorIndex((int(withdrawals[len(withdrawals)-1].ValidatorIndex) + 1) % len(validators))
 
 	if c.debug {
 		fmt.Fprintf(os.Stderr, "Next withdrawal validator index is %d\n", nextWithdrawalValidatorIndex)
@@ -127,25 +129,25 @@ func (c *command) setup(ctx context.Context) error {
 
 	// Set up chaintime.
 	c.chainTime, err = standardchaintime.New(ctx,
-		standardchaintime.WithGenesisTimeProvider(c.consensusClient.(consensusclient.GenesisTimeProvider)),
+		standardchaintime.WithGenesisProvider(c.consensusClient.(consensusclient.GenesisProvider)),
 		standardchaintime.WithSpecProvider(c.consensusClient.(consensusclient.SpecProvider)),
 	)
 	if err != nil {
 		return errors.Wrap(err, "failed to create chaintime service")
 	}
 
-	spec, err := c.consensusClient.(consensusclient.SpecProvider).Spec(ctx)
+	specResponse, err := c.consensusClient.(consensusclient.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return errors.Wrap(err, "failed to obtain spec")
 	}
 
-	if val, exists := spec["MAX_WITHDRAWALS_PER_PAYLOAD"]; !exists {
+	if val, exists := specResponse.Data["MAX_WITHDRAWALS_PER_PAYLOAD"]; !exists {
 		c.maxWithdrawalsPerPayload = 16
 	} else {
 		c.maxWithdrawalsPerPayload = val.(uint64)
 	}
 
-	if val, exists := spec["MAX_EFFECTIVE_BALANCE"]; !exists {
+	if val, exists := specResponse.Data["MAX_EFFECTIVE_BALANCE"]; !exists {
 		c.maxEffectiveBalance = 32000000000
 	} else {
 		c.maxEffectiveBalance = phase0.Gwei(val.(uint64))

cmd/validator/yield/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
@@ -36,6 +36,7 @@ type command struct {
 
 	// Input.
 	validators string
+	epoch      string
 
 	// Data access.
 	eth2Client eth2client.Service
@@ -63,6 +64,7 @@ func newCommand(_ context.Context) (*command, error) {
 		verbose: viper.GetBool("verbose"),
 		debug:   viper.GetBool("debug"),
 		json:    viper.GetBool("json"),
+		epoch:   viper.GetString("epoch"),
 		results: &output{},
 	}
 

cmd/validator/yield/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/pkg/errors"
 	"github.com/shopspring/decimal"
 	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
@@ -48,12 +49,12 @@ var (
 
 // calculateYield calculates yield from the number of active validators.
 func (c *command) calculateYield(ctx context.Context) error {
-	spec, err := c.eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	specResponse, err := c.eth2Client.(eth2client.SpecProvider).Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return err
 	}
 
-	tmp, exists := spec["BASE_REWARD_FACTOR"]
+	tmp, exists := specResponse.Data["BASE_REWARD_FACTOR"]
 	if !exists {
 		return errors.New("spec missing BASE_REWARD_FACTOR")
 	}
@@ -125,7 +126,7 @@ func (c *command) setup(ctx context.Context) error {
 	if c.validators == "" {
 		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")
@@ -138,17 +139,23 @@ func (c *command) setup(ctx context.Context) error {
 			return errors.New("connection does not provide validator information")
 		}
 
-		validators, err := validatorsProvider.Validators(ctx, "head", nil)
+		epoch, err := util.ParseEpoch(ctx, chainTime, c.epoch)
 		if err != nil {
-			return errors.Wrap(err, "failed to obtain validators")
+			return errors.Wrap(err, "failed to parse epoch")
+		}
+
+		response, err := validatorsProvider.Validators(ctx, &api.ValidatorsOpts{
+			State: fmt.Sprintf("%d", chainTime.FirstSlotOfEpoch(epoch)),
+		})
+		if err != nil {
+			return err
 		}
 
-		currentEpoch := chainTime.CurrentEpoch()
 		activeValidators := decimal.Zero
 		activeValidatorBalance := decimal.Zero
-		for _, validator := range validators {
-			if validator.Validator.ActivationEpoch <= currentEpoch &&
-				validator.Validator.ExitEpoch > currentEpoch {
+		for _, validator := range response.Data {
+			if validator.Validator.ActivationEpoch <= epoch &&
+				validator.Validator.ExitEpoch > epoch {
 				activeValidators = activeValidators.Add(one)
 				activeValidatorBalance = activeValidatorBalance.Add(decimal.NewFromInt(int64(validator.Validator.EffectiveBalance)))
 			}

cmd/validatorexit.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
@@ -23,13 +23,16 @@ import (
 
 var validatorExitCmd = &cobra.Command{
 	Use:   "exit",
-	Short: "Send an exit request for a validator",
-	Long: `Send an exit request for a validator.  For example:
+	Short: "Send an exit request for one or more validators",
+	Long: `Send an exit request for one or more validators.  For example:
 
     ethdo validator exit --validator=12345
 
 The validator and key can be specified in one of a number of ways:
 
+  - mnemonic using --mnemonic; this will scan the mnemonic and generate all applicable operations
+  - mnemonic and path to the validator key using --mnemonic and --path; this will generate a single operation
+  - mnemonic and validator index or public key --mnemonic and --validator; this will generate a single operation
   - mnemonic and path to the validator using --mnemonic and --path
   - mnemonic and validator index or public key using --mnemonic and --validator
   - validator private key using --private-key
@@ -54,10 +57,10 @@ In quiet mode this will return 0 if the exit operation has been generated (and s
 func init() {
 	validatorCmd.AddCommand(validatorExitCmd)
 	validatorFlags(validatorExitCmd)
-	validatorExitCmd.Flags().Int64("epoch", -1, "Epoch at which to exit (defaults to current epoch)")
+	validatorExitCmd.Flags().String("epoch", "", "Epoch at which to exit (defaults to current epoch)")
 	validatorExitCmd.Flags().Bool("prepare-offline", false, "Create files for offline use")
 	validatorExitCmd.Flags().String("validator", "", "Validator to exit")
-	validatorExitCmd.Flags().String("signed-operation", "", "Use pre-defined JSON signed operation as created by --json to transmit the exit operation (reads from exit-operation.json if not present)")
+	validatorExitCmd.Flags().String("signed-operations", "", "Use pre-defined JSON signed operation as created by --json to transmit the exit operations (reads from exit-operations.json if not present)")
 	validatorExitCmd.Flags().Bool("offline", false, "Do not attempt to connect to a beacon node to obtain information for the operation")
 	validatorExitCmd.Flags().String("fork-version", "", "Fork version to use for signing (overrides fetching from beacon node)")
 	validatorExitCmd.Flags().String("genesis-validators-root", "", "Genesis validators root to use for signing (overrides fetching from beacon node)")
@@ -73,7 +76,7 @@ func validatorExitBindings(cmd *cobra.Command) {
 	if err := viper.BindPFlag("validator", cmd.Flags().Lookup("validator")); err != nil {
 		panic(err)
 	}
-	if err := viper.BindPFlag("signed-operation", cmd.Flags().Lookup("signed-operation")); err != nil {
+	if err := viper.BindPFlag("signed-operations", cmd.Flags().Lookup("signed-operations")); err != nil {
 		panic(err)
 	}
 	if err := viper.BindPFlag("offline", cmd.Flags().Lookup("offline")); err != nil {

cmd/validatorinfo.go

@@ -30,6 +30,7 @@ import (
 	"github.com/pkg/errors"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
 	"github.com/wealdtech/ethdo/util"
 	string2eth "github.com/wealdtech/go-string2eth"
 )
@@ -53,6 +54,14 @@ In quiet mode this will return 0 if the validator information can be obtained, o
 		})
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")
 
+		chainTime, err := standardchaintime.New(ctx,
+			standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
+			standardchaintime.WithGenesisProvider(eth2Client.(eth2client.GenesisProvider)),
+		)
+		if err != nil {
+			errCheck(err, "failed to set up chaintime service")
+		}
+
 		if viper.GetString("validator") == "" {
 			fmt.Println("validator is required")
 			os.Exit(_exitFailure)
@@ -84,7 +93,13 @@ In quiet mode this will return 0 if the validator information can be obtained, o
 		}
 		if viper.GetBool("verbose") {
 			if validator.Status.IsPending() {
-				fmt.Printf("Activation eligibility epoch: %d\n", validator.Validator.ActivationEligibilityEpoch)
+				if validator.Validator.ActivationEpoch == 0xffffffffffffffff {
+					fmt.Printf("Activation eligibility epoch: %d\n", validator.Validator.ActivationEligibilityEpoch)
+					fmt.Printf("Activation eligibility timestamp: %v\n", chainTime.StartOfEpoch(validator.Validator.ActivationEligibilityEpoch))
+				} else {
+					fmt.Printf("Activation epoch: %d\n", validator.Validator.ActivationEpoch)
+					fmt.Printf("Activation timestamp: %v\n", chainTime.StartOfEpoch(validator.Validator.ActivationEpoch))
+				}
 			}
 			if validator.Status.HasActivated() {
 				fmt.Printf("Activation epoch: %d\n", validator.Validator.ActivationEpoch)

cmd/validatorkeycheck.go

@@ -26,7 +26,7 @@ var validatorKeycheckCmd = &cobra.Command{
 	Short: "Check that the withdrawal credentials for a validator matches the given key.",
 	Long: `Check that the withdrawal credentials for a validator matches the given key.  For example:
 
-    ethdo validator keycheck --withdrawal-credentials=0x007e28dcf9029e8d92ca4b5d01c66c934e7f3110606f34ae3052cbf67bd3fc02 --privkey=0x1b46e61babc7a6a0fbfe8e416de3c71f85e367f24e0bfcb12e57adb11117662c
+    ethdo validator keycheck --withdrawal-credentials=0x007e28dcf9029e8d92ca4b5d01c66c934e7f3110606f34ae3052cbf67bd3fc02 --private-key=0x1b46e61babc7a6a0fbfe8e416de3c71f85e367f24e0bfcb12e57adb11117662c
 
 A mnemonic can be used in place of a private key, in which case the first 1,024 indices of the standard withdrawal key path will be scanned for a matching key.
 
@@ -50,14 +50,10 @@ func init() {
 	validatorCmd.AddCommand(validatorKeycheckCmd)
 	validatorFlags(validatorKeycheckCmd)
 	validatorKeycheckCmd.Flags().String("withdrawal-credentials", "", "Withdrawal credentials to check (can run offline)")
-	validatorKeycheckCmd.Flags().String("privkey", "", "Private key from which to generate withdrawal credentials")
 }
 
 func validatorKeycheckBindings(cmd *cobra.Command) {
 	if err := viper.BindPFlag("withdrawal-credentials", cmd.Flags().Lookup("withdrawal-credentials")); err != nil {
 		panic(err)
 	}
-	if err := viper.BindPFlag("privkey", cmd.Flags().Lookup("privkey")); err != nil {
-		panic(err)
-	}
 }

cmd/validatoryield.go

@@ -48,10 +48,14 @@ func init() {
 	validatorCmd.AddCommand(validatorYieldCmd)
 	validatorFlags(validatorYieldCmd)
 	validatorYieldCmd.Flags().String("validators", "", "Number of active validators (default fetches from chain)")
+	validatorYieldCmd.Flags().String("epoch", "", "Epoch at which to calculate yield")
 }
 
 func validatorYieldBindings(cmd *cobra.Command) {
 	if err := viper.BindPFlag("validators", cmd.Flags().Lookup("validators")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("epoch", cmd.Flags().Lookup("epoch")); err != nil {
+		panic(err)
+	}
 }

cmd/version.go

@@ -1,4 +1,4 @@
-// Copyright © 2019 - 2023 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
@@ -16,7 +16,7 @@ package cmd
 import (
 	"fmt"
 	"os"
-	dbg "runtime/debug"
+	"runtime/debug"
 
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
@@ -24,7 +24,7 @@ import (
 
 // ReleaseVersion is the release version of the codebase.
 // Usually overridden by tag names when building binaries.
-var ReleaseVersion = "local build (latest release 1.30.0)"
+var ReleaseVersion = "local build (latest release 1.35.2)"
 
 // versionCmd represents the version command.
 var versionCmd = &cobra.Command{
@@ -36,7 +36,16 @@ var versionCmd = &cobra.Command{
 	Run: func(cmd *cobra.Command, args []string) {
 		fmt.Println(ReleaseVersion)
 		if viper.GetBool("verbose") {
-			buildInfo, ok := dbg.ReadBuildInfo()
+			if info, ok := debug.ReadBuildInfo(); ok {
+				for _, setting := range info.Settings {
+					if setting.Key == "vcs.revision" {
+						fmt.Printf("Commit hash: %s\n", setting.Value)
+						break
+					}
+				}
+			}
+
+			buildInfo, ok := debug.ReadBuildInfo()
 			if ok {
 				fmt.Printf("Package: %s\n", buildInfo.Path)
 				fmt.Println("Dependencies:")

cmd/wallet/batch/command.go

@@ -0,0 +1,62 @@
+// Copyright © 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
+//
+//     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 walletbatch
+
+import (
+	"context"
+	"time"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+	"github.com/wealdtech/ethdo/util"
+)
+
+type command struct {
+	quiet   bool
+	verbose bool
+	debug   bool
+
+	timeout time.Duration
+
+	// Operation.
+	walletName      string
+	passphrases     []string
+	batchPassphrase string
+}
+
+func newCommand(_ context.Context) (*command, error) {
+	c := &command{
+		quiet:           viper.GetBool("quiet"),
+		verbose:         viper.GetBool("verbose"),
+		debug:           viper.GetBool("debug"),
+		timeout:         viper.GetDuration("timeout"),
+		walletName:      viper.GetString("wallet"),
+		passphrases:     util.GetPassphrases(),
+		batchPassphrase: viper.GetString("batch-passphrase"),
+	}
+
+	if c.timeout == 0 {
+		return nil, errors.New("timeout is required")
+	}
+
+	if c.walletName == "" {
+		return nil, errors.New("wallet is required")
+	}
+
+	if c.batchPassphrase == "" {
+		return nil, errors.New("batch passphrase is required")
+	}
+
+	return c, nil
+}

cmd/wallet/batch/output.go

@@ -0,0 +1,22 @@
+// Copyright © 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
+//
+//     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 walletbatch
+
+import (
+	"context"
+)
+
+func (c *command) output(_ context.Context) (string, error) {
+	return "", nil
+}

cmd/wallet/batch/process.go

@@ -0,0 +1,43 @@
+// Copyright © 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
+//
+//     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 walletbatch
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/wealdtech/ethdo/util"
+	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
+)
+
+func (c *command) process(ctx context.Context) error {
+	// Obtain the wallet.
+	opCtx, cancel := context.WithTimeout(ctx, c.timeout)
+	wallet, err := util.WalletFromInput(opCtx)
+	cancel()
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain wallet")
+	}
+	batchCreator, isBatchCreator := wallet.(e2wtypes.WalletBatchCreator)
+	if !isBatchCreator {
+		return errors.New("wallet does not support batching")
+	}
+
+	// Create the batch.
+	if err := batchCreator.BatchWallet(ctx, util.GetPassphrases(), c.batchPassphrase); err != nil {
+		return errors.Wrap(err, "failed to batch wallet")
+	}
+
+	return nil
+}

cmd/wallet/batch/process_internal_test.go

@@ -0,0 +1,63 @@
+// Copyright © 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
+//
+//     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 walletbatch
+
+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\":\"Invalid block: invalid\"}",
+		},
+	}
+
+	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/wallet/batch/run.go

@@ -0,0 +1,50 @@
+// Copyright © 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
+//
+//     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 walletbatch
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"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.Wrap(err, "failed to set up command")
+	}
+
+	// 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")
+	}
+
+	if viper.GetBool("quiet") {
+		return "", nil
+	}
+
+	results, err := c.output(ctx)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to obtain output")
+	}
+
+	return results, nil
+}

cmd/wallet/import/process_internal_test.go

@@ -62,7 +62,7 @@ func TestProcess(t *testing.T) {
 				data:       append([]byte{0x00}, data...),
 				passphrase: "ce%NohGhah4ye5ra",
 			},
-			err: "failed to import wallet: unhandled version 0x00",
+			err: "failed to import wallet: failed to decrypt wallet: unhandled version 0x00",
 		},
 		{
 			name: "PassphraseMissing",
@@ -70,7 +70,7 @@ func TestProcess(t *testing.T) {
 				timeout: 5 * time.Second,
 				data:    data,
 			},
-			err: "failed to import wallet: invalid key",
+			err: "failed to import wallet: failed to decrypt wallet: invalid key",
 		},
 		{
 			name: "PassphraseIncorrect",
@@ -79,7 +79,7 @@ func TestProcess(t *testing.T) {
 				data:       data,
 				passphrase: "weak",
 			},
-			err: "failed to import wallet: invalid key",
+			err: "failed to import wallet: failed to decrypt wallet: invalid key",
 		},
 		{
 			name: "Good",

cmd/wallet/sharedexport/output.go

@@ -15,7 +15,7 @@ package walletsharedexport
 
 import (
 	"context"
-	"fmt"
+	"encoding/hex"
 	"strings"
 
 	"github.com/pkg/errors"
@@ -32,7 +32,7 @@ func output(_ context.Context, data *dataOut) (string, error) {
 
 	builder := strings.Builder{}
 	for i := range data.shares {
-		builder.WriteString(fmt.Sprintf("%x", data.shares[i]))
+		builder.WriteString(hex.EncodeToString(data.shares[i]))
 		if i != len(data.shares)-1 {
 			builder.WriteString("\n")
 		}

cmd/walletbatch.go

@@ -0,0 +1,54 @@
+// Copyright © 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
+//
+//     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"
+	walletbatch "github.com/wealdtech/ethdo/cmd/wallet/batch"
+)
+
+var walletBatchCmd = &cobra.Command{
+	Use:   "batch",
+	Short: "Batch a wallet",
+	Long: `Batch a wallet.  For example:
+
+    ethdo wallet batch --wallet="Primary wallet" --passphrase=accounts-secret --batch-passphrase=batch-secret
+
+In quiet mode this will return 0 if the wallet is batched successfully, otherwise 1.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := walletbatch.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if res != "" {
+			fmt.Println(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	walletCmd.AddCommand(walletBatchCmd)
+	walletFlags(walletBatchCmd)
+	walletBatchCmd.Flags().String("batch-passphrase", "", "The passphrase to use for the batch")
+}
+
+func walletBatchBindings(cmd *cobra.Command) {
+	if err := viper.BindPFlag("batch-passphrase", cmd.Flags().Lookup("batch-passphrase")); err != nil {
+		panic(err)
+	}
+}

docs/exitingvalidators.md

@@ -0,0 +1,204 @@
+# Exiting validators
+Exiting a validator relieves the validator of its duties and makes the initial deposit eligible for withdrawal.  This document provides information on how to exit one or more validators given account information.
+
+## Concepts
+The following concepts are useful when understanding the rest of this guide.
+
+### Validator
+A validator is a logical entity that secures the Ethereum beacon chain (and hence the execution chain) by proposing blocks and attesting to blocks proposed by other validators.
+
+### Private key
+A private key is a hexadecimal string (_e.g._ 0x010203…a1a2a3) that can be used to generate a public key and (in the case of the execution chain) Ethereum address.
+
+### Mnemonic
+A mnemonic is a 24-word phrase that can be used to generate multiple private keys with the use of _paths_.  Mnemonics are supported in the following languages:
+* chinese simplified
+* chinese traditional
+* czech
+* english
+* french
+* italian
+* japanese
+* korean
+* spanish
+
+### Path
+A path is a string starting with "m" and containing a number of components separated by "/", for example "m/12381/3600/0/0".  The process to obtain a key from a mnemonic and path is known as "hierarchical derivation".
+
+### Online and Offline
+An _online_ computer is one that is is connected to the internet.  It should be running a consensus node connected to the larger Ethereum network.  An online computer is required to carry out the process, to obtain information from the consensus node and to broadcast your actions to the rest of the Ethereum network.
+
+An _offline_ computer is one that is not connected to the internet.  As such, it will not be running a consensus node.  It can optionally be used in conjunction with an online computer to provide higher levels of security for your mnemonic or private key, but is less convenient because it requires manual transfer of files from the online computer to the offline computer, and back.
+
+If you use your mnemonic when generating exit operations you should use the offline process.  If you use a private key or keystore then the online process should be safe.
+
+With only an online computer the flow of information is roughly as follows:
+
+![Online process](images/exit-online.png)
+
+Here it can be seen that a copy of `ethdo` with access to private keys connects to a consensus node with access to the internet.  Due to its connection to the internet it is possible that the computer on which `ethdo` and the consensus node runs has been compromised, and as such would expose the private keys to an attacker.
+
+With both an offline and an online computer the flow of information is roughly as follows:
+
+![Offline process](images/exit-offline.png)
+
+Here the copy of `ethdo` with access to private keys is on an offline computer, which protects it from being compromised via the internet.  Data is physically moved from the offline to the online computer via a USB storage key or similar, and none of the information on the online computer is sensitive.
+
+## Preparation
+Regardless of the method selected, preparation must take place on the online computer to ensure that `ethdo` can access your consensus node.  `ethdo` will attempt to find a local consensus node automatically, but if not then an explicit connection value will be required.  To find out if `ethdo` has access to the consensus node run:
+
+```sh
+ethdo node info
+```
+
+The result should be something similar to the following:
+
+```
+Syncing: false
+```
+
+Alternatively, the result may look like this:
+
+```
+No connection supplied; using mainnet public access endpoint
+Syncing: false
+```
+
+which means that a local consensus node was not accessed and instead a public endpoint specifically assigned to handle these operations was used instead.  If you do have a local consensus node but see this message it means that the local node could not be accessed, usually because it is running on a non-standard port.  If this is the case for your configuration, you need to let `ethdo` know where the consensus node's REST API is.  For example, if your consensus node is serving its REST API on port 12345 then you should add `--connection=http://localhost:12345` to all `ethdo` commands in this process, for example:
+
+```sh
+ethdo --connection=http://localhost:12345 node info
+```
+
+Note that some consensus nodes may require configuration to serve their REST API.  Please refer to the documentation of your specific consensus node to enable this.
+
+Regardless of your method used above, it is important to confirm that the "Syncing" value is "false".  If this is "true" it means that the node is currently syncing, and you will need to wait for the process to finish before proceeding.
+
+Once the preparation is complete you should select either basic or advanced operation, depending on your requirements.
+
+## Basic operation
+Given the above concepts, the purpose of this guide is to exit one or more active validators, allowing the initial deposit to be returned.
+
+Basic operation is suitable in the majority of cases.  If you:
+
+- generated your validators using a mnemonic (_e.g._ using the deposit CLI or launchpad)
+- want to exit all of your validators at the same time
+
+then this method is for you.  If any of the above does not apply then please go to the "Advanced operation" section.
+
+### Online process
+The online process generates and broadcasts the operations to exit all of your validators tied to a mnemonic in a single action.
+
+One piece of information are required for carrying out this process online: the mnemonic.
+
+On your _online_ computer run the following:
+
+```
+ethdo validator exit --mnemonic="abandon abandon abandon … art"
+```
+
+Replacing the `mnemonic` value with your own values.  This command will:
+
+1. obtain information from your consensus node about all currently-running validators and various additional information required to generate the operations
+2. scan your mnemonic to find any validators that were generated by it, and create the operations to exit
+3. broadcast the exit operations to the Ethereum network
+
+### Online and Offline process
+The online and offline process contains three steps.  In the first, data is gathered on the online computer.  In the second, the exit operations are generated on the offline computer.  In the third, the operations are broadcast on the online computer.
+
+One piece of information are required for carrying out this process online: the mnemonic from which the validators were derived.
+
+On your _online_ computer run the following:
+
+```
+ethdo validator exit --prepare-offline
+```
+
+This command will:
+
+1. obtain information from your consensus node about all currently-running validators and various additional information required to generate the operations
+2. write this information to a file called `offline-preparation.json`
+
+The `offline-preparation.json` file must be copied to your _offline_ computer.  Once this has been done, on your _offline_ computer run the following:
+
+```
+ethdo validator exit --offline --mnemonic="abandon abandon abandon … art"
+```
+
+Replacing the `mnemonic` value with your own value.  This command will:
+
+1. read the `offline-preparation.json` file to obtain information about all currently-running validators and various additional information required to generate the operations
+2. scan your mnemonic to find any validators that were generated by it, and create the operations to exit
+3. write this information to a file called `exit-operations.json`
+
+The `exit-operations.json` file must be copied to your _online_ computer.  Once this has been done, on your _online_ computer run the following:
+
+```
+ethdo validator exit
+```
+
+This command will:
+
+1. read the `exit-operations.json` file to obtain the operations to exit the validators
+2. broadcast the exit operations to the Ethereum network
+
+## Advanced operation
+Advanced operation is required when any of the following conditions are met:
+
+- your validators were created using something other than the deposit CLI or launchpad (_e.g._ `ethdo`)
+- you want to exit your validators individually
+
+### Validator reference
+There are three options to reference a validator:
+
+- the `ethdo` account of the validator (in format wallet/account)
+- the validator's public key (in format 0x…)
+- the validator's on-chain index (in format 123…)
+- the validator's keystore, either provided directly or as a path to the keystore on the local filesystem
+
+Any of these can be passed to the following commands with the `--validator` parameter.  You need to ensure that you have this information before starting the process.
+
+**In the following examples we will use the validator with index 123.  Please replace this with the reference to your validator in all commands.**
+
+### Generating exit operations
+Note that if you are carrying out this process offline then you still need to carry out the first and third steps outlined in the "Basic operation" section above.  This is to ensure that the offline computer has the correct information to generate the operations, and that the operations are made available to the online computer for broadcasting to the network.
+
+If using the online and offline process run the commands below on the offline computer, and add the `--offline` flag to the commands below.  You will need to copy the resultant `exit-operations.json` file to the online computer to broadcast to the network.
+
+If using the online process run the commands below on the online computer.  The operation will be broadcast to the network automatically.
+
+#### Using a mnemonic and path.
+A mnemonic is a 24-word phrase from which withdrawal and validator keys are derived using a _path_.  Commonly, keys will have been generated using the path m/12381/3600/_i_/0/0, where _i_ starts at 0 for the first validator, 1 for the second validator, _etc._
+
+however this is only a standard and not a restriction, and it is possible for users to have created validators using paths of their own choice.
+
+```
+ethdo validator exit --mnemonic="abandon abandon abandon … art" --path='m/12381/3600/0/0/0'
+```
+
+replacing the path with the path to your validator key, and all other parameters with your own values.
+
+#### Using a mnemonic and validator.
+Similar to the previous section, however instead of specifying a path instead the index, public key or account of the validator is provided.
+
+```
+ethdo validator exit --mnemonic="abandon abandon abandon … art" --validator=123
+```
+
+#### Using an account
+If you used `ethdo` to create your validator you can specify the accout of the validator to generate and broadcast the exit operation with the following command:
+
+```
+ethdo validator exit --account=Wallet/Account --passphrase=secret
+```
+
+replacing the parameters with your own values.  Note that the passphrase here is the passphrsae of the validator account.
+
+## Confirming the process has succeeded
+The final step is confirming the operation has taken place.  To do so, run the following command on an online server:
+
+```sh
+ethdo validator info --validator=123
+```
+
+The result should show the state of the validator as exiting or exited.

docs/usage.md

@@ -2,7 +2,11 @@
 
 ethdo provides features to manage wallets and accounts, as well as interacting with Ethereum consensus nodes and remote signers.  Below are a list of all available commands.
 
-Note that the below provides a list of commands rather than a howto guide.  Please follow the
+Note that the below provides a list of commands rather than a guide for specific situations.  Other guides available are:
+
+- [How to change withdrawal credentials for a validator](./changingwithdrawalcredentials.md)
+- [How to convert from mnemonics to keys and accounts](./conversions.md)
+- [How to achieve common tasks with ethdo](./howto.md)
 
 ### `wallet` commands
 
@@ -25,13 +29,27 @@ Auctions: 0x812f340269c315c1d882ae7c13cdaddf862dbdbd482b1836798b2070160dd1e19408
 Operations: 0x8e2f9e8cc29658ff37ecc30e95a0807579b224586c185d128cb7a7490784c1ad9b0ab93dbe604ab075b40079931e6670
 Spending: 0x85dfc6dcee4c9da36f6473ec02fda283d6c920c641fc8e3a76113c5c227d4aeeb100efcfec977b12d20d571907d05650
 ```
+
+#### `batch`
+
+`ethdo wallet batch` batches the accounts in a wallet into a single file to allow faster decryption. Options for batching a wallet include:
+
+- `wallet`: the name of the wallet to batch
+- `passphrase`: the passphrase for of the accounts in the wallet
+- `batch-passphrase`: the passphrase for the batch.   Note that this can be the same as the passphrase for the accounts
+
+```sh
+$ ethdo wallet batch --wallet="Validators" ---passphrase="my account secret" --batch-passphrase="my batch secret"
+```
+
 #### `create`
 
 `ethdo wallet create` creates a new wallet with the given parameters.  Options for creating a wallet include:
-  - `wallet`: the name of the wallet to create
-  - `type`: the type of wallet to create.  This can be either "nd" for a non-deterministic wallet, where private keys are generated randomly, or "hd" for a hierarchical deterministic wallet, where private keys are generated from a seed and path as per [ERC-2333](https://github.com/CarlBeek/EIPs/blob/bls_path/EIPS/eip-2334.md) (defaults to "nd")
-  - `wallet-passphrase`: the passphrase for of the wallet.  This is required for hierarchical deterministic wallets, to protect the seed
-  - `mnemonic`: for hierarchical deterministic wallets only, use a pre-defined 24-word [BIP-39 seed phrase](https://en.bitcoin.it/wiki/Seed_phrase) to create the wallet, along with an additional "seed extension" phrase if required.  **Warning** The same mnemonic can be used to create multiple wallets, in which case they will generate the same keys.
+
+- `wallet`: the name of the wallet to create
+- `type`: the type of wallet to create.  This can be either "nd" for a non-deterministic wallet, where private keys are generated randomly, or "hd" for a hierarchical deterministic wallet, where private keys are generated from a seed and path as per [EIP-2333](https://eips.ethereum.org/EIPS/eip-2333) (defaults to "nd")
+- `wallet-passphrase`: the passphrase for of the wallet.  This is required for hierarchical deterministic wallets, to protect the seed
+- `mnemonic`: for hierarchical deterministic wallets only, use a pre-defined 24-word [BIP-39 seed phrase](https://en.bitcoin.it/wiki/Seed_phrase) to create the wallet, along with an additional "seed extension" phrase if required.  **Warning** The same mnemonic can be used to create multiple wallets, in which case they will generate the same keys.
 
 ```sh
 $ ethdo wallet create --wallet="Personal wallet" --type="hd" --wallet-passphrase="my wallet secret"
@@ -39,7 +57,8 @@ $ ethdo wallet create --wallet="Personal wallet" --type="hd" --wallet-passphrase
 
 #### `delete`
 `ethdo wallet delete` deletes a wallet.  Options for deleting a wallet include:
-  - `wallet`: the name of the wallet to delete
+
+- `wallet`: the name of the wallet to delete
 
 ```sh
 $ ethdo wallet delete --wallet="Old wallet"
@@ -50,8 +69,9 @@ $ ethdo wallet delete --wallet="Old wallet"
 #### `export`
 
 `ethdo wallet export` exports the wallet and all of its accounts.  Options for exporting a wallet include:
-  - `wallet`: the name of the wallet to export (defaults to "primary")
-  - `passphrase`: the passphrase with which to encrypt the wallet backup
+
+- `wallet`: the name of the wallet to export (defaults to "primary")
+- `passphrase`: the passphrase with which to encrypt the wallet backup
 
 ```sh
 $ ethdo wallet export --wallet="Personal wallet" --passphrase="my export secret"
@@ -67,9 +87,10 @@ $ ethdo wallet export --wallet="Personal wallet" --passphrase="my export secret"
 #### `import`
 
 `ethdo wallet import` imports a wallet and all of its accounts exported by `ethdo wallet export`.  Options for importing a wallet include:
-  - `data`: the data exported by `ethdo wallet export`
-  - `passphrase`: the passphrase that was provided to `ethdo wallet export` to encrypt the data
-  - `verify`: confirm information about the wallet import without importing it
+
+- `data`: the data exported by `ethdo wallet export`
+- `passphrase`: the passphrase that was provided to `ethdo wallet export` to encrypt the data
+- `verify`: confirm information about the wallet import without importing it
 
 ```sh
 $ ethdo wallet import --data="0x01c7a27ad40d45b4ae5be5f..." --passphrase="my export secret"
@@ -84,7 +105,8 @@ $ ethdo wallet import --data=`cat export.dat` --passphrase="my export secret"
 #### `info`
 
 `ethdo wallet info` provides information about a given wallet.  Options include:
-  - `wallet`: the name of the wallet
+
+- `wallet`: the name of the wallet
 
 ```sh
 $ ethdo wallet info --wallet="Personal wallet"
@@ -106,10 +128,11 @@ Personal wallet
 #### `sharedexport`
 
 `ethdo wallet sharedexport` exports the wallet and all of its accounts with shared keys.  Options for exporting a wallet include:
-  - `wallet`: the name of the wallet to export (defaults to "primary")
-  - `participants`: the total number of participants that each hold a share
-  - `threshold`: the number of participants necessary to provide their share to restore the wallet
-  - `file`: the name of the file that stores the backup
+
+- `wallet`: the name of the wallet to export (defaults to "primary")
+- `participants`: the total number of participants that each hold a share
+- `threshold`: the number of participants necessary to provide their share to restore the wallet
+- `file`: the name of the file that stores the backup
 
 ```sh
 $ ethdo wallet sharedexport --wallet="Personal wallet" --participants=3 --threshold=2 --file=backup.dat
@@ -123,8 +146,9 @@ Each line of the output is a share and should be provided to one of the particip
 #### `sharedimport`
 
 `ethdo wallet sharedimport` imports a wallet and all of its accounts exported by `ethdo wallet sharedexport`.  Options for importing a wallet include:
-  - `file`: the name of the file that stores the backup
-  - `shares`: a number of shares, defined by _threshold_ during the export, separated by spaces
+
+- `file`: the name of the file that stores the backup
+- `shares`: a number of shares, defined by _threshold_ during the export, separated by spaces
 
 ```sh
 $ ethdo wallet sharedimport --file=backup.dat --shares="298a…9189 10ea…5063"
@@ -137,9 +161,10 @@ Account commands focus on information about local accounts, generally those used
 #### `create`
 
 `ethdo account create` creates a new account with the given parameters.  Options for creating an account include:
-  - `account`: the name of the account to create (in format "wallet/account")
-  - `passphrase`: the passphrase for the account
-  - `path`: the HD path for the account (only for hierarchical deterministic accounts)
+
+- `account`: the name of the account to create (in format "wallet/account")
+- `passphrase`: the passphrase for the account
+- `path`: the HD path for the account (only for hierarchical deterministic accounts)
 
 Note that for hierarchical deterministic wallets you will also need to supply `--wallet-passphrase` to unlock the wallet seed.
 
@@ -153,10 +178,11 @@ $ ethdo account create --account="Personal wallet/Operations" --wallet-passphras
 
 `ethdo account derive` provides the ability to derive an account's keys without creating either the wallet or the account.  This allows users to quickly obtain or confirm keys without going through a relatively long process, and has the added security benefit of not writing any information to disk.  Options for deriving the account include:
 
-  - `mnemonic`: a pre-defined 24-word [BIP-39 seed phrase](https://en.bitcoin.it/wiki/Seed_phrase) to derive the account, along with an additional "seed extension" phrase if required supplied as the 25th word
-  - `path`: the HD path used to derive the account
-  - `show-private-key`: show the private of the derived account.  **Warning** displaying private keys, especially those derived from seeds held on hardware wallets, can expose your Ether to risk of being stolen.  Only use this option if you are sure you understand the risks involved
-  - `show-withdrawal-credentials`: show the withdrawal credentials of the derived account
+- `mnemonic`: a pre-defined 24-word [BIP-39 seed phrase](https://en.bitcoin.it/wiki/Seed_phrase) to derive the account, along with an additional "seed extension" phrase if required supplied as the 25th word
+- `path`: the HD path used to derive the account
+- `show-private-key`: show the private of the derived account.  **Warning** displaying private keys, especially those derived from seeds held on hardware wallets, can expose your Ether to risk of being stolen.  Only use this option if you are sure you understand the risks involved
+- `show-withdrawal-credentials`: show the withdrawal credentials of the derived account
+- `generate-keystore`: generate a keystore for the account
 
 ```sh
 $ ethdo account derive --mnemonic="abandon ... abandon art" --path="m/12381/3600/0/0"
@@ -166,9 +192,10 @@ Public key: 0x99b1f1d84d76185466d86c34bde1101316afddae76217aa86cd066979b19858c2c
 #### `import`
 
 `ethdo account import` creates a new account by importing its private key.  Options for creating the account include:
-  - `account`: the name of the account to create (in format "wallet/account")
-  - `passphrase`: the passphrase for the account
-  - `key`: the private key to import
+
+- `account`: the name of the account to create (in format "wallet/account")
+- `passphrase`: the passphrase for the account
+- `key`: the private key to import
 
 ```sh
 $ ethdo account import --account=Validators/123 --key=6dd12d588d1c05ba40e80880ac7e894aa20babdbf16da52eae26b3f267d68032 --passphrase="my account secret"
@@ -179,12 +206,14 @@ You can also import from an existing keystore such as those generated by the dep
 ```sh
 $ ethdo account import --account=Validators/123 --keystore=/path/to/keystore.json --keystore-passphrase="the keystore secret" --passphrase="my account secret"
 ```
+
 `--keystore` can either be the path to the keystore file, or the contents of the keystore file.
 
 #### `info`
 
 `ethdo account info` provides information about the given account.  Options include:
-  - `account`: the name of the account on which to obtain information (in format "wallet/account")
+
+- `account`: the name of the account on which to obtain information (in format "wallet/account")
 
 ```sh
 $ ethdo account info --account="Personal wallet/Operations"
@@ -194,8 +223,9 @@ Public key: 0x8e2f9e8cc29658ff37ecc30e95a0807579b224586c185d128cb7a7490784c1ad9b
 #### `key`
 
 `ethdo account key` provides the private key for an account.  Options include:
-  - `account`: the name of the account on which to obtain information (in format "wallet/account")
-  - `passphrase`: the passphrase for the account
+
+- `account`: the name of the account on which to obtain information (in format "wallet/account")
+- `passphrase`: the passphrase for the account
 
 ```sh
 $ ethdo account key --account=interop/00001 --passphrase=secret
@@ -205,7 +235,8 @@ $ ethdo account key --account=interop/00001 --passphrase=secret
 #### `lock`
 
 `ethdo account lock` manually locks an account on a remote signer.  Locked accounts cannot carry out signing requests.  Options include:
-  - `account`: the name of the account to lock (in format "wallet/account")
+
+- `account`: the name of the account to lock (in format "wallet/account")
 
 Note that this command only works with remote signers; it has no effect on local accounts.
 
@@ -216,8 +247,9 @@ $ ethdo account lock --account=Validators/123
 #### `unlock`
 
 `ethdo account unlock` manually unlocks an account on a remote signer.  Unlocked accounts cannot carry out signing requests.  Options include:
-  - `account`: the name of the account to unlock (in format "wallet/account")
-  - `passphrase`: the passphrase for the account
+
+- `account`: the name of the account to unlock (in format "wallet/account")
+- `passphrase`: the passphrase for the account
 
 Note that this command only works with remote signers; it has no effect on local accounts.
 
@@ -232,10 +264,11 @@ Signature commands focus on generation and verification of data signatures.
 #### `signature sign`
 
 `ethdo signature sign` signs provided data.  Options include:
-  - `data`: the data to sign, as a hex string
-  - `domain`: the domain in which to sign the data.  This is a 32-byte hex string
-  - `account`: the account to sign the data (in format "wallet/account")
-  - `passphrase`: the passphrase for the account
+
+- `data`: the data to sign, as a hex string
+- `domain`: the domain in which to sign the data.  This is a 32-byte hex string
+- `account`: the account to sign the data (in format "wallet/account")
+- `passphrase`: the passphrase for the account
 
 ```sh
 $ ethdo signature sign --data="0x08140077a94642919041503caf5cc1c89c7744a2a08d43cec91df1795b23ecf2" --account="Personal wallet/Operations" --passphrase="my account secret"
@@ -245,10 +278,11 @@ $ ethdo signature sign --data="0x08140077a94642919041503caf5cc1c89c7744a2a08d43c
 #### `signature verify`
 
 `ethdo signature verify` verifies signed data.  Options include:
-  - `data`: the data whose signature to verify, as a hex string
-  - `signature`: the signature to verify, as a hex string
-  - `account`: the account which signed the data (if available as an account, in format "wallet/account")
-  - `signer`: the public key of the account which signed the data (if not available as an account)
+
+- `data`: the data whose signature to verify, as a hex string
+- `signature`: the signature to verify, as a hex string
+- `account`: the account which signed the data (if available as an account, in format "wallet/account")
+- `signer`: the public key of the account which signed the data (if not available as an account)
 
 ```sh
 $ ethdo signature verify --data="0x08140077a94642919041503caf5cc1c89c7744a2a08d43cec91df1795b23ecf2" --signature="0x87c83b31081744667406a11170c5585a11195621d0d3f796bd9006ac4cb5f61c10bf8c5b3014cd4f792b143a644cae100cb3155e8b00a961287bd9e7a5e18cb3b80930708bc9074d11ff47f1e8b9dd0b633e71bcea725fc3e550fdc259c3d130" --account="Personal wallet/Operations"
@@ -274,8 +308,9 @@ $ ethdo version
 
 Block commands focus on providing information about Ethereum consensus blocks.
 #### `analyze`
-`ethdo block info` obtains information about a block in the Ethereum consensus chain.  Options include:
-  - `blockid`: the ID (slot, root, 'head') of the block to obtain
+`ethdo block analyze` obtains information about a block in the Ethereum consensus chain.  Options include:
+
+- `blockid`: the ID (slot, root, 'head') of the block to obtain
 
 ```sh
 $ ethdo block analyze --blockid=80
@@ -298,7 +333,9 @@ Value for block 80: 488.531
 #### `info`
 
 `ethdo block info` obtains information about a block in the Ethereum consensus chain.  Options include:
-  - `blockid`: the ID (slot, root, 'head') of the block to obtain
+
+- `blockid`: the ID (slot, root, 'head') of the block to obtain
+- `block-time`: the time (unix timestamp in decimal or hex, or a time in format YYYY-MM-DDTHH:MM:SS) of the block to obtain
 
 ```sh
 $ ethdo block info --blockid=80
@@ -311,7 +348,7 @@ Voluntary exits: 0
 Additional information is supplied when using `--verbose`
 
 ```sh
-$ ethdo block info --slot=80 --verbose
+$ ethdo block info --blockid=80 --verbose
 Parent root: 0x9a08aab7d5bbc816a9d2c20c79895519da2045e99ac6782ab3d05323a395fe51
 State root: 0xc6a2626ba5cb37f984bdc4da4dc93a5012be5b69fdcebc50be70a1181a290265
 Ethereum 1 deposit count: 512
@@ -340,8 +377,9 @@ Chain commands focus on providing information about Ethereum consensus chains.
 #### `eth1votes`
 
 `ethdo chain eth1votes` obtains information about the votes for the next Ethereum 1 block to be incorporated in to the chain for deposits.  Options include:
-  - `epoch` show the votes at the end of the given epoch
-  - `json` provide JSON output
+
+- `epoch` show the votes at the end of the given epoch
+- `json` provide JSON output
 
 ```sh
 $ ethdo chain eth1votes
@@ -375,8 +413,9 @@ Slots per epoch:	32
 #### `queues`
 
 `ethdo chain queues` obtains the activation and exit queue lengths of an Ethereum chain from the node's point of view.  Options include:
-  - `epoch` show the queue length at a given epoch
-  - `json` provide JSON output
+
+- `epoch` show the queue length at a given epoch
+- `json` provide JSON output
 
 ```sh
 $ ethdo chain queues
@@ -398,7 +437,8 @@ BASE_REWARD_FACTOR: 64
 #### `status`
 
 `ethdo chain status` obtains the status of an Ethereum consensus chain from the node's point of view.  Options include:
-  - `slot` show output in terms of slots rather than epochs
+
+- `slot` show output in terms of slots rather than epochs
 
 ```sh
 $ ethdo chain status
@@ -423,9 +463,10 @@ Prior justified epoch distance: 4
 #### `time`
 
 `ethdo chain time` calculates the time period of Ethereum consensus epochs and slots.  Options include:
-  - `epoch` show epoch and slot times for the given epoch
-  - `slot` show epoch and slot times for the given slot
-  - `timestamp` show epoch and slot times for the given timestamp
+
+- `epoch` show epoch and slot times for the given epoch
+- `slot` show epoch and slot times for the given slot
+- `timestamp` show epoch and slot times for the given timestamp
 
 ```sh
 $ ethdo chain time --epoch=1234
@@ -444,10 +485,11 @@ Deposit commands focus on information about deposit data information in a JSON f
 #### `verify`
 
 `ethdo deposit verify` verifies one or more deposit data information in a JSON file generated by the `ethdo validator depositdata` command.  Options include:
-  - `data`: either a path to the JSON file, the JSON itself, or a hex string representing a deposit transaction
-  - `withdrawalpubkey`: the public key of the withdrawal for the deposit.  If no value is supplied then withdrawal credentials for deposits will not be checked
-  - `validatorpubkey`: the public key of the validator for the deposit.  If no value is supplied then validator public keys will not be checked
-  - `depositvalue`: the value of the Ether being deposited.  If no value is supplied then deposit values will not be checked.
+
+- `data`: either a path to the JSON file, the JSON itself, or a hex string representing a deposit transaction
+- `withdrawalpubkey`: the public key of the withdrawal for the deposit.  If no value is supplied then withdrawal credentials for deposits will not be checked
+- `validatorpubkey`: the public key of the validator for the deposit.  If no value is supplied then validator public keys will not be checked
+- `depositvalue`: the value of the Ether being deposited.  If no value is supplied then deposit values will not be checked.
 
 ```sh
 $ ethdo deposit verify --data=${HOME}/depositdata.json --withdrawalpubkey=0xad1868210a0cff7aff22633c003c503d4c199c8dcca13bba5b3232fc784d39d3855936e94ce184c3ce27bf15d4347695 --validatorpubkey=0xa951530887ae2494a8cc4f11cf186963b0051ac4f7942375585b9cf98324db1e532a67e521d0fcaab510edad1352394c --depositvalue=32Ether
@@ -460,8 +502,9 @@ Epoch commands focus on information about a beacon chain epoch.
 #### `summary`
 
 `ethdo epoch summary` provides a summary of the given epoch.  Options include:
-  - `epoch`: the epoch for which to provide a summary; defaults to last complete epoch
-  - `json`: provide JSON output
+
+- `epoch`: the epoch for which to provide a summary; defaults to last complete epoch
+- `json`: provide JSON output
 
 ```sh
 $ ethdo epoch summary
@@ -493,7 +536,8 @@ Exit commands focus on information about validator exits generated by the `ethdo
 #### `verify`
 
 `ethdo exit verify` verifies the validator exit information in a JSON file generated by the `ethdo validator exit` command.  Options include:
-  - `signed-operation`: either a path to the JSON file or the JSON itself
+
+- `signed-operation`: either a path to the JSON file or the JSON itself
 
 ```sh
 $ ethdo exit verify --signed-operation=${HOME}/exit.json
@@ -543,7 +587,8 @@ Slot commands focus on information about Ethereum consensus slots.
 #### `slottime`
 
 `ethdo slot time` provides information about the time of a slot.  options include:
-  - `slot` the slot for which to provide the time
+
+- `slot` the slot for which to provide the time
 
 ```sh
 $ ethdo slot time --slot=5
@@ -557,9 +602,9 @@ Sync committee commands focus on information about sync committees.
 #### `inclusion`
 
 `ethdo synccommittee inclusion` provides information about the inclusion, or not, of a validator's sync committee messages.  Options include:
-  - `validator`: the index, public key or account of the validator in format "wallet/account"
-  - `epoch` the specific epoch for which to print sync committee contributions.  Defaults to the last complete epoch
 
+- `validator`: a [validator specifier](https://github.com/wealdtech/ethdo#validator-specifier)
+- `epoch` the specific epoch for which to print sync committee contributions.  Defaults to the last complete epoch
 
 ```sh
 $ ethdo synccommittee inclusion --index=274946 --epoch=91592
@@ -574,8 +619,9 @@ Per-slot result: ✓✓✓✓✓✓✓✓ ✓✓✕✓✓✓✓✓ ✓✓✓✓-
 #### `members`
 
 `ethdo synccommittee members` provides information about the members of a sync committee.  Options include:
-  - `epoch` the specific epoch for which to provide sync committee members.
-  - `period` the period for which to provide sync committee members.  Can be 'current' or 'next'; dfeaults to 'current'
+
+- `epoch` the specific epoch for which to provide sync committee members.
+- `period` the period for which to provide sync committee members.  Can be 'current' or 'next'; dfeaults to 'current'
 
 ```sh
 $ ethdo synccommittee members
@@ -589,7 +635,8 @@ Validator commands focus on interaction with Ethereum consensus validators.
 #### `credentials get`
 
 `ethdo validator credentials get` provides information about the withdrawal credentials for the provided validator.  Options include:
-  - `validator` the account, public key or index for which to obtain the withdrawal credentials
+
+- `validator`: a [validator specifier](https://github.com/wealdtech/ethdo#validator-specifier)
 
 ```sh
 $ ethdo validator credentials get --validator=Validators/1
@@ -606,34 +653,34 @@ $ ethdo validator credentials set --validator=Validators/1 --withdrawal-address=
 #### `depositdata`
 
 `ethdo validator depositdata` generates the data required to deposit one or more Ethereum consensus validators.  Options include:
-  - `withdrawalaccount` specify the account to be used for the withdrawal credentials (if withdrawalpubkey is not supplied)
-  - `withdrawaladdress` specify the Ethereum execution address to be used for the withdrawal credentials (if withdrawalpubkey is not supplied)
-  - `withdrawalpubkey` specify the public key to be used for the withdrawal credentials (if withdrawalaccount is not supplied)
-  - `validatoraccount` specify the account to be used for the validator
-  - `depositvalue` specify the amount of the deposit
-  - `forkversion` specify the fork version for the deposit signature; this defaults to mainnet.  Note that supplying an incorrect value could result in the loss of your deposit, so only supply this value if you are sure you know what you are doing.  You can find the value for other chains by fetching the value supplied in "Genesis fork version" of the `ethdo chain info` command
-  - `raw` generate raw hex output that can be supplied as the data to an Ethereum 1 deposit transaction
+
+- `withdrawalaccount` specify the account to be used for the withdrawal credentials (if withdrawalpubkey is not supplied)
+- `withdrawaladdress` specify the Ethereum execution address to be used for the withdrawal credentials (if withdrawalpubkey is not supplied)
+- `withdrawalpubkey` specify the public key to be used for the withdrawal credentials (if withdrawalaccount is not supplied)
+- `validatoraccount` specify the account to be used for the validator
+- `depositvalue` specify the amount of the deposit
+- `forkversion` specify the fork version for the deposit signature; this defaults to mainnet.  Note that supplying an incorrect value could result in the loss of your deposit, so only supply this value if you are sure you know what you are doing.  You can find the value for other chains by fetching the value supplied in "Genesis fork version" of the `ethdo chain info` command
+- `raw` generate raw hex output that can be supplied as the data to an Ethereum 1 deposit transaction
 
 #### `exit`
 
-`ethdo validator exit` sends a transaction to the chain to tell an active validator to exit the validation queue.  Options include:
-  - `epoch` specify an epoch before which this exit is not valid
-  - `json` generate JSON output rather than sending a transaction immediately
-  - `exit` use JSON exit input created by the `--json` option rather than generate data from scratch
+`ethdo validator exit` sends a transaction to the chain to tell an active validator to exit the validation queue.  Full information about using this command can be found in the [specific documentation](./exitingvalidators.md).
 
 ```sh
-$ ethdo validator exit --account=Validators/1 --passphrase="my validator secret"
+$ ethdo validator exit --validator=Validators/1 --passphrase="my validator secret"
 ```
 
 To send a transaction when the account is not accessible to ethdo accout you can use the validator's private key instead:
 
 ```sh
-$ ethdo validator exit --key=0x01e748d098d3bcb477d636f19d510399ae18205fadf9814ee67052f88c1f88c0
+$ ethdo validator exit --private-key=0x01e748d098d3bcb477d636f19d510399ae18205fadf9814ee67052f88c1f88c0
 ```
 
 #### `info`
 
-`ethdo validator info` provides information for a given validator.
+`ethdo validator info` provides information for a given validator.  Options include:
+
+- `validator`: the validator for which to obtain information, as a [validator specifier](https://github.com/wealdtech/ethdo#validator-specifier)
 
 ```sh
 $ ethdo validator info --validator=Validators/1
@@ -645,7 +692,7 @@ Effective balance: 3.1 Ether
 Additional information is supplied when using `--verbose`
 
 ```sh
-$ ethdo validator info --validator=Validators/1 --verbose
+$ ethdo validator info --validator=0xb3bb6b7a8d809e59544472853d219499765bf01d14de1e0549bd6fc2a86627ac9033264c84cd503b6339e3334726562f --verbose
 Epoch of data:          3398
 Index:                  26913
 Public key:             0xb3bb6b7a8d809e59544472853d219499765bf01d14de1e0549bd6fc2a86627ac9033264c84cd503b6339e3334726562f
@@ -655,21 +702,13 @@ Effective balance:      3.1 Ether
 Withdrawal credentials: 0x0033ef3cb10b36d0771ffe8a02bc5bfc7e64ea2f398ce77e25bb78989edbee36
 ```
 
-If the validator is not an account then `--validator` option can be supplied with a validator index or public key.
-
-```sh
-$ ethdo validator info --validator=0x842dd66cfeaeff4397fc7c94f7350d2131ca0c4ad14ff727963be9a1edb4526604970df6010c3da6474a9820fa81642b
-Status:            Active
-Balance:           3.201850307 Ether
-Effective balance: 3.1 Ether
-```
-
 #### `keycheck`
 
 `ethdo validator keycheck` checks if a given key matches a validator's withdrawal credentials.  Options include:
-  - `withdrawal-credentials` the withdrawal credentials against which to match
-  - `privkey` the private key used to generat matching withdrawal credentials
-  - `mnemonic` the mnemonic used to generate matching withdrawal credentials
+
+- `withdrawal-credentials` the withdrawal credentials against which to match
+- `private-key` the private key used to generat matching withdrawal credentials
+- `mnemonic` the mnemonic used to generate matching withdrawal credentials
 
 ```sh
 $ ethdo validator keycheck --withdrawal-credentials=0x007e28dcf9029e8d92ca4b5d01c66c934e7f3110606f34ae3052cbf67bd3fc02 --mnemonic='abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon abandon art'
@@ -678,7 +717,9 @@ Withdrawal credentials confirmed at path m/12381/3600/10/0
 
 #### `expectation`
 
-`ethdo validator expectation` calculates the times between expected actions.
+`ethdo validator expectation` calculates the times between expected actions.  Options include:
+
+- `validators` the number of active validators to use as the basis for calculations
 
 ```sh
 $ ethdo validator expectation
@@ -693,8 +734,9 @@ Attester commands focus on Ethereum consensus validators' actions as attesters.
 #### `duties`
 
 `ethdo attester duties` provides information on the duties that a given validator has in a given epoch.  Options include:
-  - `epoch` the epoch in which to obtain the duties (defaults to current epoch)
-  - `validator` the validator for which to fetch the duties, as an index, publi key or account in the format "wallet/account"
+
+- `epoch` the epoch in which to obtain the duties (defaults to current epoch)
+- `validator`: the validator for which to fetch the duties, as a [validator specifier](https://github.com/wealdtech/ethdo#validator-specifier)
 
 ```sh
 $ ethdo attester duties --validator=Validators/0 --epoch=5
@@ -704,8 +746,9 @@ Validator attesting in slot 186 committee 3
 #### `inclusion`
 
 `ethdo attester inclusion` finds the block with wihch an attestation is included on the chain.  Options include:
-  - `epoch` the epoch in which to obtain the inclusion information (defaults to previous epoch)
-  - `validator` the validator for which to fetch the duties, as an index, publi key or account in the format "wallet/account"
+
+- `epoch` the epoch in which to obtain the inclusion information (defaults to previous epoch)
+- `validator`: the validator for which to fetch the duties, as a [validator specifier](https://github.com/wealdtech/ethdo#validator-specifier)
 
 ```sh
 $ ethdo attester inclusion --validator=Validators/1 --epoch=6484
@@ -714,8 +757,9 @@ Attestation included in block 207492 (inclusion delay 1)
 
 #### `withdrawal`
 `ethdo validator withdrawal` provides information about the next withdrawal for the given validator.  Options include:
-  - `validator`: the list of validators for which to provide a summary
-  - `json`: provide JSON output
+
+- `validator`: the validator for which to fetch the withdrawal, as a [validator specifier](https://github.com/wealdtech/ethdo#validator-specifier)
+- `json`: provide JSON output
 
 ```sh
 $ ethdo validator withdrawal --validator=12345
@@ -725,8 +769,10 @@ Withdrawal expected at 2023-04-17T15:08:35 in block 6243041
 #### `yield`
 
 `ethdo validator yield` calculates the expected yield given the number of validators.  Options include:
-  - `validators` use a specified number of validators rather than the current number of active validators
-  - `json` obtain detailed information in JSON format
+
+- `validators` use a specified number of validators rather than the current number of active validators
+- `epoch` the epoch for which to calculate yield; defaults to the current epoch
+- `json` obtain detailed information in JSON format
 
 ```sh
 $ ethdo validator yield
@@ -735,9 +781,10 @@ Yield: 4.64%
 
 #### `summary`
 `ethdo validator summary` provides a summary of the given epoch for the given validators.  Options include:
-  - `epoch`: the epoch for which to provide a summary; defaults to last complete epoch
-  - `validators`: the list of validators for which to provide a summary
-  - `json`: provide JSON output
+
+- `epoch`: the epoch for which to provide a summary; defaults to last complete epoch
+- `validators`: the list of validators for which to provide a summary, as [validator specifiers](https://github.com/wealdtech/ethdo#validator-specifier)
+- `json`: provide JSON output
 
 ### `proposer` commands
 
@@ -746,8 +793,10 @@ Proposer commands focus on Ethereum consensus validators' actions as proposers.
 #### `duties`
 
 `ethdo proposer duties` provides information on the proposal duties for a given epoch.  Options include:
-  - `epoch` the epoch in which to obtain the duties (defaults to current epoch)
-  - `json` obtain detailed information in JSON format
+
+- `epoch` the epoch in which to obtain the duties (defaults to current epoch)
+- `slot` the slot in which to obtain the duties (overrides epoch if present)
+- `json` obtain detailed information in JSON format
 
 ```sh
 $ ethdo proposer duties --epoch=5

go.mod

@@ -3,95 +3,102 @@ module github.com/wealdtech/ethdo
 go 1.20
 
 require (
-	github.com/attestantio/go-eth2-client v0.15.8
+	github.com/attestantio/go-eth2-client v0.19.10
 	github.com/ferranbt/fastssz v0.1.3
 	github.com/gofrs/uuid v4.4.0+incompatible
-	github.com/google/uuid v1.3.0
+	github.com/google/uuid v1.5.0
 	github.com/hako/durafmt v0.0.0-20210608085754-5c1018a4e16b
-	github.com/herumi/bls-eth-go-binary v1.29.1
+	github.com/herumi/bls-eth-go-binary v1.33.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/nbutton23/zxcvbn-go v0.0.0-20210217022336-fa2cb2858354
 	github.com/pkg/errors v0.9.1
 	github.com/prysmaticlabs/go-bitfield v0.0.0-20210809151128-385d8c5e3fb7
 	github.com/prysmaticlabs/go-ssz v0.0.0-20210121151755-f6208871c388
-	github.com/rs/zerolog v1.29.0
+	github.com/rs/zerolog v1.31.0
 	github.com/shopspring/decimal v1.3.1
-	github.com/spf13/cobra v1.7.0
+	github.com/spf13/cobra v1.8.0
 	github.com/spf13/pflag v1.0.5
-	github.com/spf13/viper v1.15.0
-	github.com/stretchr/testify v1.8.2
+	github.com/spf13/viper v1.18.2
+	github.com/stretchr/testify v1.8.4
 	github.com/tyler-smith/go-bip39 v1.1.0
 	github.com/wealdtech/go-bytesutil v1.2.1
-	github.com/wealdtech/go-ecodec v1.1.3
-	github.com/wealdtech/go-eth2-types/v2 v2.8.1
-	github.com/wealdtech/go-eth2-util v1.8.1
-	github.com/wealdtech/go-eth2-wallet v1.15.1
-	github.com/wealdtech/go-eth2-wallet-dirk v1.4.2
-	github.com/wealdtech/go-eth2-wallet-distributed v1.1.5
-	github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4 v1.3.1
-	github.com/wealdtech/go-eth2-wallet-hd/v2 v2.6.1
-	github.com/wealdtech/go-eth2-wallet-nd/v2 v2.4.1
-	github.com/wealdtech/go-eth2-wallet-store-filesystem v1.17.1
-	github.com/wealdtech/go-eth2-wallet-store-s3 v1.11.3
-	github.com/wealdtech/go-eth2-wallet-store-scratch v1.7.1
-	github.com/wealdtech/go-eth2-wallet-types/v2 v2.10.1
+	github.com/wealdtech/go-ecodec v1.1.4
+	github.com/wealdtech/go-eth2-types/v2 v2.8.2
+	github.com/wealdtech/go-eth2-util v1.8.2
+	github.com/wealdtech/go-eth2-wallet v1.16.0
+	github.com/wealdtech/go-eth2-wallet-dirk v1.4.7
+	github.com/wealdtech/go-eth2-wallet-distributed v1.2.1
+	github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4 v1.4.1
+	github.com/wealdtech/go-eth2-wallet-hd/v2 v2.7.0
+	github.com/wealdtech/go-eth2-wallet-nd/v2 v2.5.0
+	github.com/wealdtech/go-eth2-wallet-store-filesystem v1.18.1
+	github.com/wealdtech/go-eth2-wallet-store-s3 v1.12.0
+	github.com/wealdtech/go-eth2-wallet-store-scratch v1.7.2
+	github.com/wealdtech/go-eth2-wallet-types/v2 v2.11.0
 	github.com/wealdtech/go-string2eth v1.2.1
-	golang.org/x/text v0.9.0
+	golang.org/x/text v0.14.0
 )
 
 require (
-	github.com/aws/aws-sdk-go v1.44.213 // indirect
+	github.com/aws/aws-sdk-go v1.50.0 // indirect
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.2 // indirect
-	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc // indirect
 	github.com/dgraph-io/ristretto v0.1.1 // indirect
-	github.com/dustin/go-humanize v1.0.0 // indirect
-	github.com/fatih/color v1.13.0 // indirect
-	github.com/fsnotify/fsnotify v1.6.0 // indirect
-	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/dustin/go-humanize v1.0.1 // indirect
+	github.com/fatih/color v1.16.0 // indirect
+	github.com/fsnotify/fsnotify v1.7.0 // indirect
+	github.com/go-logr/logr v1.4.1 // indirect
 	github.com/go-logr/stdr v1.2.2 // indirect
-	github.com/goccy/go-yaml v1.9.2 // indirect
-	github.com/golang/glog v0.0.0-20160126235308-23def4e6c14b // indirect
-	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/goccy/go-yaml v1.11.2 // indirect
+	github.com/golang/glog v1.2.0 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
+	github.com/holiman/uint256 v1.2.4 // indirect
+	github.com/huandu/go-clone v1.7.2 // indirect
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/jackc/puddle v1.3.0 // indirect
+	github.com/jackc/puddle/v2 v2.2.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect
-	github.com/klauspost/cpuid/v2 v2.2.4 // indirect
+	github.com/klauspost/cpuid/v2 v2.2.6 // indirect
 	github.com/magiconair/properties v1.8.7 // indirect
 	github.com/mattn/go-colorable v0.1.13 // indirect
-	github.com/mattn/go-isatty v0.0.16 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
+	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/minio/highwayhash v1.0.2 // indirect
-	github.com/minio/sha256-simd v1.0.0 // indirect
+	github.com/minio/sha256-simd v1.0.1 // indirect
 	github.com/mitchellh/mapstructure v1.5.0 // indirect
-	github.com/pelletier/go-toml/v2 v2.0.6 // indirect
-	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_golang v1.14.0 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
-	github.com/prometheus/common v0.37.0 // indirect
-	github.com/prometheus/procfs v0.8.0 // indirect
+	github.com/pelletier/go-toml/v2 v2.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 // indirect
+	github.com/prometheus/client_golang v1.18.0 // indirect
+	github.com/prometheus/client_model v0.5.0 // indirect
+	github.com/prometheus/common v0.46.0 // indirect
+	github.com/prometheus/procfs v0.12.0 // indirect
 	github.com/protolambda/zssz v0.1.5 // indirect
-	github.com/r3labs/sse/v2 v2.7.4 // indirect
+	github.com/r3labs/sse/v2 v2.10.0 // indirect
+	github.com/sagikazarmark/locafero v0.4.0 // indirect
+	github.com/sagikazarmark/slog-shim v0.1.0 // indirect
 	github.com/shibukawa/configdir v0.0.0-20170330084843-e180dbdc8da0 // indirect
-	github.com/spf13/afero v1.9.3 // indirect
-	github.com/spf13/cast v1.5.0 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/subosito/gotenv v1.4.2 // indirect
-	github.com/wealdtech/eth2-signer-api v1.7.1 // indirect
-	github.com/wealdtech/go-indexer v1.0.1 // indirect
-	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.37.0 // indirect
-	go.opentelemetry.io/otel v1.11.2 // indirect
-	go.opentelemetry.io/otel/metric v0.34.0 // indirect
-	go.opentelemetry.io/otel/trace v1.11.2 // indirect
-	golang.org/x/crypto v0.6.0 // indirect
-	golang.org/x/net v0.6.0 // indirect
-	golang.org/x/sync v0.1.0 // indirect
-	golang.org/x/sys v0.5.0 // indirect
-	golang.org/x/xerrors v0.0.0-20220907171357-04be3eba64a2 // indirect
-	google.golang.org/genproto v0.0.0-20221227171554-f9683d7f8bef // indirect
-	google.golang.org/grpc v1.52.0 // indirect
-	google.golang.org/protobuf v1.28.1 // indirect
+	github.com/sourcegraph/conc v0.3.0 // indirect
+	github.com/spf13/afero v1.11.0 // indirect
+	github.com/spf13/cast v1.6.0 // indirect
+	github.com/subosito/gotenv v1.6.0 // indirect
+	github.com/wealdtech/eth2-signer-api v1.7.2 // indirect
+	github.com/wealdtech/go-indexer v1.1.0 // indirect
+	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.47.0 // indirect
+	go.opentelemetry.io/otel v1.22.0 // indirect
+	go.opentelemetry.io/otel/metric v1.22.0 // indirect
+	go.opentelemetry.io/otel/trace v1.22.0 // indirect
+	go.uber.org/multierr v1.11.0 // indirect
+	golang.org/x/crypto v0.18.0 // indirect
+	golang.org/x/exp v0.0.0-20240119083558-1b970713d09a // indirect
+	golang.org/x/net v0.20.0 // indirect
+	golang.org/x/sync v0.6.0 // indirect
+	golang.org/x/sys v0.16.0 // indirect
+	golang.org/x/xerrors v0.0.0-20231012003039-104605ab7028 // indirect
+	google.golang.org/genproto v0.0.0-20240116215550-a9fa1716bcac // indirect
+	google.golang.org/genproto/googleapis/api v0.0.0-20240116215550-a9fa1716bcac // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20240116215550-a9fa1716bcac // indirect
+	google.golang.org/grpc v1.60.1 // indirect
+	google.golang.org/protobuf v1.32.0 // indirect
 	gopkg.in/cenkalti/backoff.v1 v1.1.0 // indirect
 	gopkg.in/ini.v1 v1.67.0 // indirect
 	gopkg.in/yaml.v2 v2.4.0 // indirect

go.sum

@@ -1,817 +1,266 @@
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.44.3/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.50.0/go.mod h1:r9sluTvynVuxRIOHXQEHMFffphuXHOMZMycpNR5e6To=
-cloud.google.com/go v0.52.0/go.mod h1:pXajvRH/6o3+F9jDHZWQ5PbGhn+o8w9qiu/CffaVdO4=
-cloud.google.com/go v0.53.0/go.mod h1:fp/UouUEsRkN6ryDKNW/Upv/JBKnv6WDthjR6+vze6M=
-cloud.google.com/go v0.54.0/go.mod h1:1rq2OEkV3YMf6n/9ZvGWI3GWw0VoqH/1x2nd8Is/bPc=
-cloud.google.com/go v0.56.0/go.mod h1:jr7tqZxxKOVYizybht9+26Z/gUq7tiRzu+ACVAMbKVk=
-cloud.google.com/go v0.57.0/go.mod h1:oXiQ6Rzq3RAkkY7N6t3TcE6jE+CIBBbA36lwQ1JyzZs=
-cloud.google.com/go v0.62.0/go.mod h1:jmCYTdRCQuc1PHIIJ/maLInMho30T/Y0M4hTdTShOYc=
-cloud.google.com/go v0.65.0/go.mod h1:O5N8zS7uWy9vkA9vayVHs65eM1ubvY4h553ofrNHObY=
-cloud.google.com/go v0.72.0/go.mod h1:M+5Vjvlc2wnp6tjzE102Dw08nGShTscUx2nZMufOKPI=
-cloud.google.com/go v0.74.0/go.mod h1:VV1xSbzvo+9QJOxLDaJfTjx5e+MePCpCWwvftOeQmWk=
-cloud.google.com/go v0.75.0/go.mod h1:VGuuCn7PG0dwsd5XPVm2Mm3wlh3EL55/79EKB6hlPTY=
-cloud.google.com/go v0.105.0 h1:DNtEKRBAAzeS4KyIory52wWHuClNaXJ5x1F7xa4q+5Y=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/bigquery v1.3.0/go.mod h1:PjpwJnslEMmckchkHFfq+HTD2DmtT67aNFKH1/VBDHE=
-cloud.google.com/go/bigquery v1.4.0/go.mod h1:S8dzgnTigyfTmLBfrtrhyYhwRxG72rYxvftPBK2Dvzc=
-cloud.google.com/go/bigquery v1.5.0/go.mod h1:snEHRnqQbz117VIFhE8bmtwIDY80NLUZUMb4Nv6dBIg=
-cloud.google.com/go/bigquery v1.7.0/go.mod h1://okPTzCYNXSlb24MZs83e2Do+h+VXtc4gLoIoXIAPc=
-cloud.google.com/go/bigquery v1.8.0/go.mod h1:J5hqkt3O0uAFnINi6JXValWIb1v0goeZM77hZzJN/fQ=
-cloud.google.com/go/compute v1.14.0 h1:hfm2+FfxVmnRlh6LpB7cg1ZNU+5edAHmW679JePztk0=
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 cloud.google.com/go/compute/metadata v0.2.3 h1:mg4jlk7mCAj6xXp9UJ4fjI9VUI5rubuGBW5aJ7UnBMY=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/datastore v1.1.0/go.mod h1:umbIZjpQpHh4hmRpGhH4tLFup+FVzqBi1b3c64qFpCk=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/pubsub v1.1.0/go.mod h1:EwwdRX2sKPjnvnqCa270oGRyludottCI76h+R3AArQw=
-cloud.google.com/go/pubsub v1.2.0/go.mod h1:jhfEVHT8odbXTkndysNHCcx0awwzvfOlguIAii9o8iA=
-cloud.google.com/go/pubsub v1.3.1/go.mod h1:i+ucay31+CNRpDW4Lu78I4xXG+O1r/MAHgjpRVR+TSU=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-cloud.google.com/go/storage v1.5.0/go.mod h1:tpKbwo567HUNpVclU5sGELwQWBDZ8gh0ZeosJ0Rtdos=
-cloud.google.com/go/storage v1.6.0/go.mod h1:N7U0C8pVQ/+NIKOBQyamJIeKQKkZ+mxpohlUTyfDhBk=
-cloud.google.com/go/storage v1.8.0/go.mod h1:Wv1Oy7z6Yz3DshWRJFhqM/UCfaWIRTdp0RXyy7KQOVs=
-cloud.google.com/go/storage v1.10.0/go.mod h1:FLPqc6j+Ki4BU591ie1oL6qBQGu2Bl/tZ9ullr3+Kg0=
-cloud.google.com/go/storage v1.14.0/go.mod h1:GrKmX003DSIwi9o29oFT7YDnHYwZoctc3fOKtUw0Xmo=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
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-github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751/go.mod h1:LOuyumcjzFXgccqObfd/Ljyb9UuFJ6TxHnclSeseNhc=
-github.com/alecthomas/units v0.0.0-20151022065526-2efee857e7cf/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/alecthomas/units v0.0.0-20190717042225-c3de453c63f4/go.mod h1:ybxpYRFXyAe+OPACYpWeL0wqObRcbAqCMya13uyzqw0=
-github.com/alecthomas/units v0.0.0-20190924025748-f65c72e2690d/go.mod h1:rBZYJk541a8SKzHPHnH3zbiI+7dagKZ0cgpgrD7Fyho=
-github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
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-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/cespare/xxhash v1.1.0/go.mod h1:XrSqR1VqqWfGrhpAt58auRo0WTKS1nRRg3ghfAqPWnc=
 github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/cespare/xxhash/v2 v2.1.2 h1:YRXhKfTDauu4ajMg1TPgFO5jnlC2HCbmLXMcTG5cbYE=
-github.com/cespare/xxhash/v2 v2.1.2/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
-github.com/chzyer/logex v1.1.10/go.mod h1:+Ywpsq7O8HXn0nuIou7OrIPyXbp3wmkHB+jjWRnGsAI=
-github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e/go.mod h1:nSuG5e5PlCu98SY8svDHJxuZscDgtXS6KTTbou5AhLI=
-github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1/go.mod h1:Q3SI9o4m/ZMnBNeIyt5eFwwo7qiLfzFZmjNmxjkiQlU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/cncf/udpa/go v0.0.0-20191209042840-269d4d468f6f/go.mod h1:M8M6+tZqaGXZJjfX53e64911xZQV5JYwmTeXPW+k8Sc=
-github.com/cncf/udpa/go v0.0.0-20200629203442-efcf912fb354/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/udpa/go v0.0.0-20201120205902-5459f2c99403/go.mod h1:WmhPx2Nbnhtbo57+VJT5O0JRkEi1Wbu0z5j0R8u5Hbk=
-github.com/cncf/xds/go v0.0.0-20210312221358-fbca930ec8ed/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/cncf/xds/go v0.0.0-20210805033703-aa0b78936158/go.mod h1:eXthEFrGJvWHgFFCl3hGmgk+/aYT6PnTQLykKQRLhEs=
-github.com/coreos/go-systemd/v22 v22.3.2/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/coreos/go-systemd/v22 v22.3.3-0.20220203105225-a9a7ef127534/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
-github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
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+github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
+github.com/cpuguy83/go-md2man/v2 v2.0.3/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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-honnef.co/go/tools v0.0.1-2020.1.4/go.mod h1:X/FiERA/W4tHapMX5mGpAtMSVEeEUOyHaw9vFzvIQ3k=
-rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
-rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
-rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=

services/chaintime/service.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading.
+// Copyright © 2021 - 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
@@ -60,4 +60,6 @@ type Service interface {
 	AltairInitialSyncCommitteePeriod() uint64
 	// CapellaInitialEpoch provides the epoch at which the Capella hard fork takes place.
 	CapellaInitialEpoch() phase0.Epoch
+	// DenebInitialEpoch provides the epoch at which the Deneb hard fork takes place.
+	DenebInitialEpoch() phase0.Epoch
 }

services/chaintime/standard/parameters.go

@@ -20,14 +20,14 @@ import (
 )
 
 type parameters struct {
-	logLevel            zerolog.Level
-	genesisTimeProvider eth2client.GenesisTimeProvider
-	specProvider        eth2client.SpecProvider
+	logLevel        zerolog.Level
+	genesisProvider eth2client.GenesisProvider
+	specProvider    eth2client.SpecProvider
 }
 
 // Parameter is the interface for service parameters.
 type Parameter interface {
-	apply(*parameters)
+	apply(p *parameters)
 }
 
 type parameterFunc func(*parameters)
@@ -43,10 +43,10 @@ func WithLogLevel(logLevel zerolog.Level) Parameter {
 	})
 }
 
-// WithGenesisTimeProvider sets the genesis time provider.
-func WithGenesisTimeProvider(provider eth2client.GenesisTimeProvider) Parameter {
+// WithGenesisProvider sets the genesis time provider.
+func WithGenesisProvider(provider eth2client.GenesisProvider) Parameter {
 	return parameterFunc(func(p *parameters) {
-		p.genesisTimeProvider = provider
+		p.genesisProvider = provider
 	})
 }
 
@@ -71,8 +71,8 @@ func parseAndCheckParameters(params ...Parameter) (*parameters, error) {
 	if parameters.specProvider == nil {
 		return nil, errors.New("no spec provider specified")
 	}
-	if parameters.genesisTimeProvider == nil {
-		return nil, errors.New("no genesis time provider specified")
+	if parameters.genesisProvider == nil {
+		return nil, errors.New("no genesis provider specified")
 	}
 
 	return &parameters, nil

services/chaintime/standard/service.go

@@ -1,4 +1,4 @@
-// Copyright © 2021 Weald Technology Trading.
+// Copyright © 2021 - 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
@@ -18,6 +18,7 @@ import (
 	"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/pkg/errors"
 	"github.com/rs/zerolog"
@@ -33,6 +34,7 @@ type Service struct {
 	altairForkEpoch              phase0.Epoch
 	bellatrixForkEpoch           phase0.Epoch
 	capellaForkEpoch             phase0.Epoch
+	denebForkEpoch               phase0.Epoch
 }
 
 // module-wide log.
@@ -48,18 +50,18 @@ func New(ctx context.Context, params ...Parameter) (*Service, error) {
 	// Set logging.
 	log = zerologger.With().Str("service", "chaintime").Str("impl", "standard").Logger().Level(parameters.logLevel)
 
-	genesisTime, err := parameters.genesisTimeProvider.GenesisTime(ctx)
+	genesisResponse, err := parameters.genesisProvider.Genesis(ctx, &api.GenesisOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain genesis time")
 	}
-	log.Trace().Time("genesis_time", genesisTime).Msg("Obtained genesis time")
+	log.Trace().Time("genesis_time", genesisResponse.Data.GenesisTime).Msg("Obtained genesis time")
 
-	spec, err := parameters.specProvider.Spec(ctx)
+	specResponse, err := parameters.specProvider.Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain spec")
 	}
 
-	tmp, exists := spec["SECONDS_PER_SLOT"]
+	tmp, exists := specResponse.Data["SECONDS_PER_SLOT"]
 	if !exists {
 		return nil, errors.New("SECONDS_PER_SLOT not found in spec")
 	}
@@ -68,7 +70,7 @@ func New(ctx context.Context, params ...Parameter) (*Service, error) {
 		return nil, errors.New("SECONDS_PER_SLOT of unexpected type")
 	}
 
-	tmp, exists = spec["SLOTS_PER_EPOCH"]
+	tmp, exists = specResponse.Data["SLOTS_PER_EPOCH"]
 	if !exists {
 		return nil, errors.New("SLOTS_PER_EPOCH not found in spec")
 	}
@@ -78,7 +80,7 @@ func New(ctx context.Context, params ...Parameter) (*Service, error) {
 	}
 
 	var epochsPerSyncCommitteePeriod uint64
-	if tmp, exists := spec["EPOCHS_PER_SYNC_COMMITTEE_PERIOD"]; exists {
+	if tmp, exists := specResponse.Data["EPOCHS_PER_SYNC_COMMITTEE_PERIOD"]; exists {
 		tmp2, ok := tmp.(uint64)
 		if !ok {
 			return nil, errors.New("EPOCHS_PER_SYNC_COMMITTEE_PERIOD of unexpected type")
@@ -107,14 +109,22 @@ func New(ctx context.Context, params ...Parameter) (*Service, error) {
 	}
 	log.Trace().Uint64("epoch", uint64(capellaForkEpoch)).Msg("Obtained Capella fork epoch")
 
+	denebForkEpoch, err := fetchDenebForkEpoch(ctx, parameters.specProvider)
+	if err != nil {
+		// Set to far future epoch.
+		denebForkEpoch = 0xffffffffffffffff
+	}
+	log.Trace().Uint64("epoch", uint64(denebForkEpoch)).Msg("Obtained Deneb fork epoch")
+
 	s := &Service{
-		genesisTime:                  genesisTime,
+		genesisTime:                  genesisResponse.Data.GenesisTime,
 		slotDuration:                 slotDuration,
 		slotsPerEpoch:                slotsPerEpoch,
 		epochsPerSyncCommitteePeriod: epochsPerSyncCommitteePeriod,
 		altairForkEpoch:              altairForkEpoch,
 		bellatrixForkEpoch:           bellatrixForkEpoch,
 		capellaForkEpoch:             capellaForkEpoch,
+		denebForkEpoch:               denebForkEpoch,
 	}
 
 	return s, nil
@@ -228,11 +238,11 @@ func fetchAltairForkEpoch(ctx context.Context,
 	error,
 ) {
 	// Fetch the fork version.
-	spec, err := specProvider.Spec(ctx)
+	specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return 0, errors.Wrap(err, "failed to obtain spec")
 	}
-	tmp, exists := spec["ALTAIR_FORK_EPOCH"]
+	tmp, exists := specResponse.Data["ALTAIR_FORK_EPOCH"]
 	if !exists {
 		return 0, errors.New("altair fork version not known by chain")
 	}
@@ -257,11 +267,11 @@ func fetchBellatrixForkEpoch(ctx context.Context,
 	error,
 ) {
 	// Fetch the fork version.
-	spec, err := specProvider.Spec(ctx)
+	specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return 0, errors.Wrap(err, "failed to obtain spec")
 	}
-	tmp, exists := spec["BELLATRIX_FORK_EPOCH"]
+	tmp, exists := specResponse.Data["BELLATRIX_FORK_EPOCH"]
 	if !exists {
 		return 0, errors.New("bellatrix fork version not known by chain")
 	}
@@ -286,11 +296,11 @@ func fetchCapellaForkEpoch(ctx context.Context,
 	error,
 ) {
 	// Fetch the fork version.
-	spec, err := specProvider.Spec(ctx)
+	specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
 	if err != nil {
 		return 0, errors.Wrap(err, "failed to obtain spec")
 	}
-	tmp, exists := spec["CAPELLA_FORK_EPOCH"]
+	tmp, exists := specResponse.Data["CAPELLA_FORK_EPOCH"]
 	if !exists {
 		return 0, errors.New("capella fork version not known by chain")
 	}
@@ -302,3 +312,32 @@ func fetchCapellaForkEpoch(ctx context.Context,
 
 	return phase0.Epoch(epoch), nil
 }
+
+// DenebInitialEpoch provides the epoch at which the Deneb hard fork takes place.
+func (s *Service) DenebInitialEpoch() phase0.Epoch {
+	return s.denebForkEpoch
+}
+
+func fetchDenebForkEpoch(ctx context.Context,
+	specProvider eth2client.SpecProvider,
+) (
+	phase0.Epoch,
+	error,
+) {
+	// Fetch the fork version.
+	specResponse, err := specProvider.Spec(ctx, &api.SpecOpts{})
+	if err != nil {
+		return 0, errors.Wrap(err, "failed to obtain spec")
+	}
+	tmp, exists := specResponse.Data["DENEB_FORK_EPOCH"]
+	if !exists {
+		return 0, errors.New("deneb fork version not known by chain")
+	}
+	epoch, isEpoch := tmp.(uint64)
+	if !isEpoch {
+		//nolint:revive
+		return 0, errors.New("DENEB_FORK_EPOCH is not a uint64!")
+	}
+
+	return phase0.Epoch(epoch), nil
+}

services/chaintime/standard/service_test.go

@@ -32,7 +32,7 @@ func TestService(t *testing.T) {
 	slotsPerEpoch := uint64(32)
 	epochsPerSyncCommitteePeriod := uint64(256)
 
-	mockGenesisTimeProvider := mock.NewGenesisTimeProvider(genesisTime)
+	mockGenesisProvider := mock.NewGenesisProvider(genesisTime)
 	mockSpecProvider := mock.NewSpecProvider(slotDuration, slotsPerEpoch, epochsPerSyncCommitteePeriod)
 
 	tests := []struct {
@@ -41,18 +41,18 @@ func TestService(t *testing.T) {
 		err    string
 	}{
 		{
-			name: "GenesisTimeProviderMissing",
+			name: "GenesisProviderMissing",
 			params: []standard.Parameter{
 				standard.WithLogLevel(zerolog.Disabled),
 				standard.WithSpecProvider(mockSpecProvider),
 			},
-			err: "problem with parameters: no genesis time provider specified",
+			err: "problem with parameters: no genesis provider specified",
 		},
 		{
 			name: "SpecProviderMissing",
 			params: []standard.Parameter{
 				standard.WithLogLevel(zerolog.Disabled),
-				standard.WithGenesisTimeProvider(mockGenesisTimeProvider),
+				standard.WithGenesisProvider(mockGenesisProvider),
 			},
 			err: "problem with parameters: no spec provider specified",
 		},
@@ -60,7 +60,7 @@ func TestService(t *testing.T) {
 			name: "Good",
 			params: []standard.Parameter{
 				standard.WithLogLevel(zerolog.Disabled),
-				standard.WithGenesisTimeProvider(mockGenesisTimeProvider),
+				standard.WithGenesisProvider(mockGenesisProvider),
 				standard.WithSpecProvider(mockSpecProvider),
 			},
 		},
@@ -96,10 +96,10 @@ func createService(genesisTime time.Time) (chaintime.Service, time.Duration, uin
 		},
 	}
 
-	mockGenesisTimeProvider := mock.NewGenesisTimeProvider(genesisTime)
+	mockGenesisProvider := mock.NewGenesisProvider(genesisTime)
 	mockSpecProvider := mock.NewSpecProvider(slotDuration, slotsPerEpoch, epochsPerSyncCommitteePeriod)
 	s, err := standard.New(context.Background(),
-		standard.WithGenesisTimeProvider(mockGenesisTimeProvider),
+		standard.WithGenesisProvider(mockGenesisProvider),
 		standard.WithSpecProvider(mockSpecProvider),
 	)
 	return s, slotDuration, slotsPerEpoch, epochsPerSyncCommitteePeriod, forkSchedule, err

testing/mock/eth2client.go

@@ -18,31 +18,37 @@ import (
 	"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/phase0"
 )
 
-// GenesisTimeProvider is a mock for eth2client.GenesisTimeProvider.
-type GenesisTimeProvider struct {
+// GenesisProvider is a mock for eth2client.GenesisProvider.
+type GenesisProvider struct {
 	genesisTime time.Time
 }
 
-// NewGenesisTimeProvider returns a mock genesis time provider with the provided value.
-func NewGenesisTimeProvider(genesisTime time.Time) eth2client.GenesisTimeProvider {
-	return &GenesisTimeProvider{
+// NewGenesisProvider returns a mock genesis provider with the provided value.
+func NewGenesisProvider(genesisTime time.Time) eth2client.GenesisProvider {
+	return &GenesisProvider{
 		genesisTime: genesisTime,
 	}
 }
 
-// GenesisTime is a mock.
-func (m *GenesisTimeProvider) GenesisTime(_ context.Context) (time.Time, error) {
-	return m.genesisTime, nil
+// Genesisis a mock.
+func (m *GenesisProvider) Genesis(_ context.Context, _ *api.GenesisOpts) (*api.Response[*apiv1.Genesis], error) {
+	return &api.Response[*apiv1.Genesis]{
+		Data: &apiv1.Genesis{
+			GenesisTime: m.genesisTime,
+		},
+		Metadata: make(map[string]any),
+	}, nil
 }
 
 // SpecProvider is a mock for eth2client.SpecProvider.
 type SpecProvider struct {
-	spec map[string]interface{}
+	spec map[string]any
 }
 
 // NewSpecProvider returns a mock spec provider with the provided values.
@@ -51,7 +57,7 @@ func NewSpecProvider(slotDuration time.Duration,
 	epochsPerSyncCommitteePeriod uint64,
 ) eth2client.SpecProvider {
 	return &SpecProvider{
-		spec: map[string]interface{}{
+		spec: map[string]any{
 			"SECONDS_PER_SLOT":                 slotDuration,
 			"SLOTS_PER_EPOCH":                  slotsPerEpoch,
 			"EPOCHS_PER_SYNC_COMMITTEE_PERIOD": epochsPerSyncCommitteePeriod,
@@ -60,8 +66,11 @@ func NewSpecProvider(slotDuration time.Duration,
 }
 
 // Spec is a mock.
-func (m *SpecProvider) Spec(_ context.Context) (map[string]interface{}, error) {
-	return m.spec, nil
+func (m *SpecProvider) Spec(_ context.Context, _ *api.SpecOpts) (*api.Response[map[string]any], error) {
+	return &api.Response[map[string]any]{
+		Data:     m.spec,
+		Metadata: make(map[string]any),
+	}, nil
 }
 
 // ForkScheduleProvider is a mock for eth2client.ForkScheduleProvider.
@@ -77,8 +86,11 @@ func NewForkScheduleProvider(schedule []*phase0.Fork) eth2client.ForkSchedulePro
 }
 
 // ForkSchedule is a mock.
-func (m *ForkScheduleProvider) ForkSchedule(_ context.Context) ([]*phase0.Fork, error) {
-	return m.schedule, nil
+func (m *ForkScheduleProvider) ForkSchedule(_ context.Context, _ *api.ForkScheduleOpts) (*api.Response[[]*phase0.Fork], error) {
+	return &api.Response[[]*phase0.Fork]{
+		Data:     m.schedule,
+		Metadata: make(map[string]any),
+	}, nil
 }
 
 // SlotsPerEpochProvider is a mock for eth2client.SlotsPerEpochProvider.
@@ -146,6 +158,6 @@ func NewBeaconCommitteeSubscriptionsSubmitter() eth2client.BeaconCommitteeSubscr
 }
 
 // SubmitBeaconCommitteeSubscriptions is a mock.
-func (m *BeaconCommitteeSubscriptionsSubmitter) SubmitBeaconCommitteeSubscriptions(_ context.Context, _ []*api.BeaconCommitteeSubscription) error {
+func (m *BeaconCommitteeSubscriptionsSubmitter) SubmitBeaconCommitteeSubscriptions(_ context.Context, _ []*apiv1.BeaconCommitteeSubscription) error {
 	return nil
 }

util/account.go

@@ -252,7 +252,7 @@ func accountFromMnemonicAndPath(mnemonic string, path string) (e2wtypes.Account,
 	}
 
 	// Ensure the path is valid.
-	match := hdPathRegex.Match([]byte(path))
+	match := hdPathRegex.MatchString(path)
 	if !match {
 		return nil, errors.New("path does not match expected format m/…")
 	}

util/beaconheadercache.go

@@ -15,9 +15,12 @@ package util
 
 import (
 	"context"
+	"errors"
 	"fmt"
+	"net/http"
 
 	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"
 )
@@ -50,20 +53,23 @@ func (b *BeaconBlockHeaderCache) Fetch(ctx context.Context,
 ) {
 	entry, exists := b.entries[slot]
 	if !exists {
-		header, err := b.beaconBlockHeadersProvider.BeaconBlockHeader(ctx, fmt.Sprintf("%d", slot))
+		response, err := b.beaconBlockHeadersProvider.BeaconBlockHeader(ctx, &api.BeaconBlockHeaderOpts{Block: fmt.Sprintf("%d", slot)})
 		if err != nil {
-			return nil, err
-		}
-		if header == nil {
-			entry = &beaconBlockHeaderEntry{
-				present: false,
+			var apiErr *api.Error
+			if errors.As(err, &apiErr) && apiErr.StatusCode == http.StatusNotFound {
+				entry = &beaconBlockHeaderEntry{
+					present: false,
+				}
+			} else {
+				return nil, err
 			}
 		} else {
 			entry = &beaconBlockHeaderEntry{
 				present: true,
-				value:   header,
+				value:   response.Data,
 			}
 		}
+
 		b.entries[slot] = entry
 	}
 	return entry.value, nil

util/epoch_test.go

@@ -34,11 +34,11 @@ func TestParseEpoch(t *testing.T) {
 	slotDuration := 12 * time.Second
 	slotsPerEpoch := uint64(32)
 	epochsPerSyncCommitteePeriod := uint64(256)
-	mockGenesisTimeProvider := mock.NewGenesisTimeProvider(genesisTime)
+	mockGenesisProvider := mock.NewGenesisProvider(genesisTime)
 	mockSpecProvider := mock.NewSpecProvider(slotDuration, slotsPerEpoch, epochsPerSyncCommitteePeriod)
 	chainTime, err := standardchaintime.New(context.Background(),
 		standardchaintime.WithLogLevel(zerolog.Disabled),
-		standardchaintime.WithGenesisTimeProvider(mockGenesisTimeProvider),
+		standardchaintime.WithGenesisProvider(mockGenesisProvider),
 		standardchaintime.WithSpecProvider(mockSpecProvider),
 	)
 	require.NoError(t, err)

util/misc.go

@@ -196,7 +196,7 @@ func WalletAndAccountsFromPath(ctx context.Context, path string) (e2wtypes.Walle
 
 	accounts := make([]e2wtypes.Account, 0)
 	for account := range wallet.Accounts(ctx) {
-		if re.Match([]byte(account.Name())) {
+		if re.MatchString(account.Name()) {
 			accounts = append(accounts, account)
 		}
 	}