Bump version.

Output "prater" as network name in launchpad format

.github/workflows/golangci-lint.yml

@@ -0,0 +1,23 @@
+name: golangci-lint
+on: [ push, pull_request ]
+jobs:
+  golangci:
+    name: lint
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          # Required: the version of golangci-lint is required and must be specified without patch version: we always use the latest patch version.
+          version: v1.29
+
+          # Optional: working directory, useful for monorepos
+          # working-directory: somedir
+
+          # Optional: golangci-lint command line arguments.
+          args: --timeout=10m
+
+          # Optional: show only new issues if it's a pull request. The default value is `false`.
+          # only-new-issues: true

.github/workflows/release.yml

@@ -14,7 +14,7 @@ jobs:
     - name: Set up Go 1.x
       uses: actions/setup-go@v2
       with:
-        go-version: ^1.13
+        go-version: ^1.16
       id: go
 
     - name: Check out code into the Go module directory
@@ -50,11 +50,11 @@ jobs:
 
     - name: Fetch xgo
       run: |
-       go get github.com/suburbandad/xgo
+       go install github.com/wealdtech/xgo@latest
 
     - name: Cross-compile linux
       run: |
-        xgo -v -x -ldflags="-X github.com/wealdtech/ethdo/cmd.ReleaseVersion=${RELEASE_VERSION}" --targets="linux/amd64,linux/arm64" github.com/wealdtech/ethdo
+        xgo -v -x -ldflags="-X github.com/wealdtech/ethdo/cmd.ReleaseVersion=${RELEASE_VERSION}" --targets="linux/amd64" github.com/wealdtech/ethdo
 
     - name: Cross-compile windows
       run: |
@@ -63,20 +63,20 @@ jobs:
     - name: Create windows release files
       run: |
        mv ethdo-windows-4.0-amd64.exe ethdo.exe
-       sha256sum ethdo.exe >ethdo-${RELEASE_VERSION}-windows.sha256
        zip --junk-paths ethdo-${RELEASE_VERSION}-windows-exe.zip ethdo.exe
+       sha256sum ethdo-${RELEASE_VERSION}-windows-exe.zip >ethdo-${RELEASE_VERSION}-windows.sha256
 
     - name: Create linux AMD64 tgz file
       run: |
        mv ethdo-linux-amd64 ethdo
-       sha256sum ethdo >ethdo-${RELEASE_VERSION}-linux-amd64.sha256
        tar zcf ethdo-${RELEASE_VERSION}-linux-amd64.tar.gz ethdo
+       sha256sum ethdo-${RELEASE_VERSION}-linux-amd64.tar.gz >ethdo-${RELEASE_VERSION}-linux-amd64.sha256
 
-    - name: Create linux ARM64 tgz file
-      run: |
-       mv ethdo-linux-arm64 ethdo
-       sha256sum ethdo >ethdo-${RELEASE_VERSION}-linux-arm64.sha256
-       tar zcf ethdo-${RELEASE_VERSION}-linux-arm64.tar.gz ethdo
+       # - name: Create linux ARM64 tgz file
+       #   run: |
+       #    mv ethdo-linux-arm64 ethdo
+       #    tar zcf ethdo-${RELEASE_VERSION}-linux-arm64.tar.gz ethdo
+       #    sha256sum ethdo-${RELEASE_VERSION}-linux-arm64.tar.gz >ethdo-${RELEASE_VERSION}-linux-arm64.sha256
 
     - name: Create release
       id: create_release
@@ -133,24 +133,24 @@ jobs:
         asset_name: ethdo-${{ env.RELEASE_VERSION }}-linux-amd64.tar.gz
         asset_content_type: application/gzip
 
-    - name: Upload linux ARM64 checksum file
-      id: upload-release-asset-linux-arm64-checksum
-      uses: actions/upload-release-asset@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: ./ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.sha256
-        asset_name: ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.sha256
-        asset_content_type: text/plain
+          # - name: Upload linux ARM64 checksum file
+          #   id: upload-release-asset-linux-arm64-checksum
+          #   uses: actions/upload-release-asset@v1
+          #   env:
+          #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          #   with:
+          #     upload_url: ${{ steps.create_release.outputs.upload_url }}
+          #     asset_path: ./ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.sha256
+          #     asset_name: ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.sha256
+          #     asset_content_type: text/plain
 
-    - name: Upload linux ARM64 tgz file
-      id: upload-release-asset-linux-arm64
-      uses: actions/upload-release-asset@v1
-      env:
-        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-      with:
-        upload_url: ${{ steps.create_release.outputs.upload_url }}
-        asset_path: ./ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.tar.gz
-        asset_name: ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.tar.gz
-        asset_content_type: application/gzip
+          # - name: Upload linux ARM64 tgz file
+          #   id: upload-release-asset-linux-arm64
+          #   uses: actions/upload-release-asset@v1
+          #   env:
+          #     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          #   with:
+          #     upload_url: ${{ steps.create_release.outputs.upload_url }}
+          #     asset_path: ./ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.tar.gz
+          #     asset_name: ethdo-${{ env.RELEASE_VERSION }}-linux-arm64.tar.gz
+          #     asset_content_type: application/gzip

CHANGELOG.md

@@ -1,3 +1,56 @@
+1.18.0:
+  - add "-ssz" option to "block info"
+  - add "block analyze" command
+  - support bellatrix
+
+1.17.0:
+  - add sync committee information to "chain time"
+  - add details of vote success to "attester inclusion --verbose"
+  - add "synccommittee inclusion"
+
+1.15.1:
+  - provide sync committee slots in "chain status"
+  - clarify that --connection should be a URL
+
+1.15.0:
+  - add --period to "synccommittee members", can be "current", "next"
+  - add "validator expectation"
+
+1.14.0:
+  - add "chain verify signedcontributionandproof"
+  - show both block and body root in "block info"
+  - add exit / withdrawable epoch to "validator info"
+
+1.13.0:
+  - rework and provide additional information to "chain status" output
+
+1.12.0:
+  - add "synccommittee members"
+
+1.11.0
+  - add Altair information to "block info"
+  - add more information to "chain info"
+
+1.10.2
+  - use local shamir code (copied from github.com/hashicorp/vault)
+
+1.10.0
+  - add "wallet sharedexport" and "wallet sharedimport"
+
+1.9.1
+  - Avoid crash when required interfaces for chain status command are not supported
+  - Avoid crash with latest version of herumi/go-bls
+
+1.9.0
+  - allow use of Ethereum 1 address as withdrawal credentials
+
+1.8.1
+  - fix issue where 'attester duties' and 'attester inclusion' could crash
+
+1.8.0
+  - add "chain time"
+  - add "validator keycheck"
+
 1.7.5:
   - add "slot time"
   - add "attester duties"

Dockerfile

@@ -1,4 +1,4 @@
-FROM golang:1.14-buster as builder
+FROM golang:1.17-bullseye as builder
 
 WORKDIR /app
 
@@ -10,10 +10,12 @@ COPY . .
 
 RUN go build
 
-FROM debian:buster-slim
+FROM debian:bullseye-slim
+
+RUN apt-get update && DEBIAN_FRONTEND=noninteractive apt install -y ca-certificates && apt-get clean && rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app
 
 COPY --from=builder /app/ethdo /app
 
-ENTRYPOINT ["/app/ethdo"]
+ENTRYPOINT ["/app/ethdo"]

cmd/account/derive/output_internal_test.go

@@ -25,6 +25,9 @@ import (
 
 func blsPrivateKey(input string) *e2types.BLSPrivateKey {
 	data, err := hex.DecodeString(strings.TrimPrefix(input, "0x"))
+	if err != nil {
+		panic(err)
+	}
 	key, err := e2types.BLSPrivateKeyFromBytes(data)
 	if err != nil {
 		panic(err)
@@ -58,7 +61,7 @@ func TestOutput(t *testing.T) {
 		{
 			name: "PrivatKey",
 			dataOut: &dataOut{
-				key:     blsPrivateKey("0x068dce0c90cb428ab37a74af0191eac49648035f1aaef077734b91e05985ec55"),
+				key:            blsPrivateKey("0x068dce0c90cb428ab37a74af0191eac49648035f1aaef077734b91e05985ec55"),
 				showPrivateKey: true,
 			},
 			needs: []string{"Public key", "Private key"},
@@ -75,7 +78,7 @@ func TestOutput(t *testing.T) {
 			name: "All",
 			dataOut: &dataOut{
 				key:                       blsPrivateKey("0x068dce0c90cb428ab37a74af0191eac49648035f1aaef077734b91e05985ec55"),
-				showPrivateKey:                   true,
+				showPrivateKey:            true,
 				showWithdrawalCredentials: true,
 			},
 			needs: []string{"Public key", "Private key", "Withdrawal credentials"},

cmd/attestation.go

@@ -27,6 +27,3 @@ var attestationCmd = &cobra.Command{
 func init() {
 	RootCmd.AddCommand(attestationCmd)
 }
-
-func attestationFlags(cmd *cobra.Command) {
-}

cmd/attester/duties/input.go

@@ -63,17 +63,19 @@ func input(ctx context.Context) (*dataIn, error) {
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, viper.GetString("connection"), viper.GetDuration("timeout"), viper.GetBool("allow-insecure-connections"))
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to connect to Ethereum 2 beacon node")
+		return nil, err
 	}
 
+	// Required data.
+	config, err := data.eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to obtain beacon chain configuration")
+	}
+	data.slotsPerEpoch = config["SLOTS_PER_EPOCH"].(uint64)
+
 	// Epoch
 	epoch := viper.GetInt64("epoch")
 	if epoch == -1 {
-		config, err := data.eth2Client.(eth2client.SpecProvider).Spec(ctx)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to obtain beacon chain configuration")
-		}
-		data.slotsPerEpoch = config["SLOTS_PER_EPOCH"].(uint64)
 		slotDuration := config["SECONDS_PER_SLOT"].(time.Duration)
 		genesis, err := data.eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
 		if err != nil {

cmd/attester/duties/input_internal_test.go

@@ -73,7 +73,7 @@ func TestInput(t *testing.T) {
 				"timeout": "5s",
 				"pubkey":  "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
 			},
-			err: "failed to connect to Ethereum 2 beacon node: failed to connect to beacon node: problem with parameters: no address specified",
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
 		},
 	}
 

cmd/attester/duties/process.go

@@ -66,7 +66,10 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	if len(validators) == 0 {
 		return nil, errors.New("validator is not known")
 	}
-	validator := validators[0]
+	var validator *api.Validator
+	for _, v := range validators {
+		validator = v
+	}
 
 	results := &dataOut{
 		debug:   data.debug,

cmd/attester/inclusion/input.go

@@ -15,12 +15,14 @@ package attesterinclusion
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/spf13/viper"
+	"github.com/wealdtech/ethdo/services/chaintime"
 	"github.com/wealdtech/ethdo/util"
 )
 
@@ -34,9 +36,11 @@ type dataIn struct {
 	slotsPerEpoch uint64
 	// Operation.
 	eth2Client eth2client.Service
+	chainTime  chaintime.Service
 	epoch      spec.Epoch
 	account    string
 	pubKey     string
+	index      string
 }
 
 func input(ctx context.Context) (*dataIn, error) {
@@ -50,18 +54,24 @@ func input(ctx context.Context) (*dataIn, error) {
 	data.verbose = viper.GetBool("verbose")
 	data.debug = viper.GetBool("debug")
 
-	// Account or pubkey.
-	if viper.GetString("account") == "" && viper.GetString("pubkey") == "" {
-		return nil, errors.New("account or pubkey is required")
-	}
+	// Account.
 	data.account = viper.GetString("account")
+
+	// PubKey.
 	data.pubKey = viper.GetString("pubkey")
 
+	// ID.
+	data.index = viper.GetString("index")
+
+	if viper.GetString("account") == "" && viper.GetString("index") == "" && viper.GetString("pubkey") == "" {
+		return nil, errors.New("account, index or pubkey is required")
+	}
+
 	// Ethereum 2 client.
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, viper.GetString("connection"), viper.GetDuration("timeout"), viper.GetBool("allow-insecure-connections"))
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to connect to Ethereum 2 beacon node")
+		return nil, err
 	}
 
 	config, err := data.eth2Client.(eth2client.SpecProvider).Spec(ctx)
@@ -84,6 +94,9 @@ func input(ctx context.Context) (*dataIn, error) {
 		}
 	}
 	data.epoch = spec.Epoch(epoch)
+	if data.debug {
+		fmt.Printf("Epoch is %d\n", data.epoch)
+	}
 
 	return data, nil
 }

cmd/attester/inclusion/input_internal_test.go

@@ -61,11 +61,11 @@ func TestInput(t *testing.T) {
 			err:  "timeout is required",
 		},
 		{
-			name: "AccountMissing",
+			name: "IndexMissing",
 			vars: map[string]interface{}{
 				"timeout": "5s",
 			},
-			err: "account or pubkey is required",
+			err: "account, index or pubkey is required",
 		},
 		{
 			name: "ConnectionMissing",
@@ -73,7 +73,7 @@ func TestInput(t *testing.T) {
 				"timeout": "5s",
 				"pubkey":  "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
 			},
-			err: "failed to connect to Ethereum 2 beacon node: failed to connect to beacon node: problem with parameters: no address specified",
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
 		},
 	}
 

cmd/attester/inclusion/output.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019 - 2022 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 +16,9 @@ package attesterinclusion
 import (
 	"context"
 	"fmt"
+	"strings"
 
-	spec "github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 )
 
@@ -25,22 +26,67 @@ type dataOut struct {
 	debug            bool
 	quiet            bool
 	verbose          bool
-	slot             spec.Slot
+	attestation      *phase0.Attestation
+	slot             phase0.Slot
 	attestationIndex uint64
-	inclusionDelay   spec.Slot
+	inclusionDelay   phase0.Slot
 	found            bool
+	headCorrect      bool
+	headTimely       bool
+	sourceTimely     bool
+	targetCorrect    bool
+	targetTimely     bool
 }
 
 func output(ctx context.Context, data *dataOut) (string, error) {
+	buf := strings.Builder{}
 	if data == nil {
-		return "", errors.New("no data")
+		return buf.String(), errors.New("no data")
 	}
 
 	if !data.quiet {
 		if data.found {
-			return fmt.Sprintf("Attestation included in block %d, attestation %d (inclusion delay %d)", data.slot, data.attestationIndex, data.inclusionDelay), nil
+			buf.WriteString("Attestation included in block ")
+			buf.WriteString(fmt.Sprintf("%d", data.slot))
+			buf.WriteString(", index ")
+			buf.WriteString(fmt.Sprintf("%d", data.attestationIndex))
+			if data.verbose {
+				buf.WriteString("\nInclusion delay: ")
+				buf.WriteString(fmt.Sprintf("%d", data.inclusionDelay))
+				buf.WriteString("\nHead correct: ")
+				if data.headCorrect {
+					buf.WriteString("✓")
+				} else {
+					buf.WriteString("✕")
+				}
+				buf.WriteString("\nHead timely: ")
+				if data.headTimely {
+					buf.WriteString("✓")
+				} else {
+					buf.WriteString("✕")
+				}
+				buf.WriteString("\nSource timely: ")
+				if data.sourceTimely {
+					buf.WriteString("✓")
+				} else {
+					buf.WriteString("✕")
+				}
+				buf.WriteString("\nTarget correct: ")
+				if data.targetCorrect {
+					buf.WriteString("✓")
+				} else {
+					buf.WriteString("✕")
+				}
+				buf.WriteString("\nTarget timely: ")
+				if data.targetTimely {
+					buf.WriteString("✓")
+				} else {
+					buf.WriteString("✕")
+				}
+			}
+		} else {
+			buf.WriteString("Attestation not found")
 		}
-		return "Attestation not found", nil
 	}
-	return "", nil
+	return buf.String(), nil
 }

cmd/attester/inclusion/output_internal_test.go

@@ -44,7 +44,29 @@ func TestOutput(t *testing.T) {
 				attestationIndex: 456,
 				inclusionDelay:   7,
 			},
-			res: "Attestation included in block 123, attestation 456 (inclusion delay 7)",
+			res: `Attestation included in block 123, index 456`,
+		},
+		{
+			name: "Verbose",
+			dataOut: &dataOut{
+				verbose:          true,
+				found:            true,
+				slot:             123,
+				attestationIndex: 456,
+				inclusionDelay:   7,
+				headCorrect:      true,
+				headTimely:       false,
+				sourceTimely:     false,
+				targetCorrect:    true,
+				targetTimely:     true,
+			},
+			res: `Attestation included in block 123, index 456
+Inclusion delay: 7
+Head correct: ✓
+Head timely: ✕
+Source timely: ✕
+Target correct: ✓
+Target timely: ✓`,
 		},
 	}
 

cmd/attester/inclusion/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019 - 2022 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
@@ -14,17 +14,16 @@
 package attesterinclusion
 
 import (
+	"bytes"
 	"context"
-	"encoding/hex"
 	"fmt"
-	"strings"
 
 	eth2client "github.com/attestantio/go-eth2-client"
 	api "github.com/attestantio/go-eth2-client/api/v1"
-	spec "github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
 	"github.com/wealdtech/ethdo/util"
-	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
 )
 
 func process(ctx context.Context, data *dataIn) (*dataOut, error) {
@@ -32,41 +31,33 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		return nil, errors.New("no data")
 	}
 
-	var account e2wtypes.Account
 	var err error
-	if data.account != "" {
-		ctx, cancel := context.WithTimeout(ctx, data.timeout)
-		defer cancel()
-		_, account, err = util.WalletAndAccountFromPath(ctx, data.account)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to obtain account")
-		}
-	} else {
-		pubKeyBytes, err := hex.DecodeString(strings.TrimPrefix(data.pubKey, "0x"))
-		if err != nil {
-			return nil, errors.Wrap(err, fmt.Sprintf("failed to decode public key %s", data.pubKey))
-		}
-		account, err = util.NewScratchAccount(nil, pubKeyBytes)
-		if err != nil {
-			return nil, errors.Wrap(err, fmt.Sprintf("invalid public key %s", data.pubKey))
-		}
+
+	data.chainTime, err = standardchaintime.New(ctx,
+		standardchaintime.WithSpecProvider(data.eth2Client.(eth2client.SpecProvider)),
+		standardchaintime.WithForkScheduleProvider(data.eth2Client.(eth2client.ForkScheduleProvider)),
+		standardchaintime.WithGenesisTimeProvider(data.eth2Client.(eth2client.GenesisTimeProvider)),
+	)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to set up chaintime service")
 	}
 
-	// Fetch validator
-	pubKeys := make([]spec.BLSPubKey, 1)
-	pubKey, err := util.BestPublicKey(account)
+	validatorIndex, err := util.ValidatorIndex(ctx, data.eth2Client, data.account, data.pubKey, data.index)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to obtain public key for account")
+		return nil, errors.Wrap(err, "failed to obtain validator index")
 	}
-	copy(pubKeys[0][:], pubKey.Marshal())
-	validators, err := data.eth2Client.(eth2client.ValidatorsProvider).ValidatorsByPubKey(ctx, fmt.Sprintf("%d", uint64(data.epoch)*data.slotsPerEpoch), pubKeys)
+
+	validators, err := data.eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, fmt.Sprintf("%d", uint64(data.epoch)*data.slotsPerEpoch), []phase0.ValidatorIndex{validatorIndex})
 	if err != nil {
 		return nil, errors.New("failed to obtain validator information")
 	}
 	if len(validators) == 0 {
 		return nil, errors.New("validator is not known")
 	}
-	validator := validators[0]
+	var validator *api.Validator
+	for _, v := range validators {
+		validator = v
+	}
 
 	results := &dataOut{
 		debug:   data.debug,
@@ -78,6 +69,9 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain duty for validator")
 	}
+	if data.debug {
+		fmt.Printf("Duty is %s\n", duty.String())
+	}
 
 	startSlot := duty.Slot + 1
 	endSlot := startSlot + 32
@@ -89,20 +83,50 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		if signedBlock == nil {
 			continue
 		}
-		if signedBlock.Message.Slot != slot {
+		blockSlot, err := signedBlock.Slot()
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to obtain block slot")
+		}
+		if blockSlot != slot {
 			continue
 		}
 		if data.debug {
 			fmt.Printf("Fetched block for slot %d\n", slot)
 		}
-		for i, attestation := range signedBlock.Message.Body.Attestations {
+		attestations, err := signedBlock.Attestations()
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to obtain block attestations")
+		}
+		for i, attestation := range attestations {
 			if attestation.Data.Slot == duty.Slot &&
 				attestation.Data.Index == duty.CommitteeIndex &&
 				attestation.AggregationBits.BitAt(duty.ValidatorCommitteeIndex) {
+
+				headCorrect := false
+				targetCorrect := false
+				if data.verbose {
+					headCorrect, err = calcHeadCorrect(ctx, data, attestation)
+					if err != nil {
+						return nil, errors.Wrap(err, "failed to obtain head correct result")
+					}
+					targetCorrect, err = calcTargetCorrect(ctx, data, attestation)
+					if err != nil {
+						return nil, errors.Wrap(err, "failed to obtain target correct result")
+					}
+				}
+				results.found = true
+				results.attestation = attestation
 				results.slot = slot
 				results.attestationIndex = uint64(i)
 				results.inclusionDelay = slot - duty.Slot
-				results.found = true
+				results.sourceTimely = results.inclusionDelay <= 5 // sqrt(32)
+				results.targetCorrect = targetCorrect
+				results.targetTimely = targetCorrect && results.inclusionDelay <= 32
+				results.headCorrect = headCorrect
+				results.headTimely = headCorrect && results.inclusionDelay == 1
+				if data.debug {
+					fmt.Printf("Attestation is %s\n", attestation.String())
+				}
 				return results, nil
 			}
 		}
@@ -110,9 +134,52 @@ 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, slotsPerEpoch uint64) (*api.AttesterDuty, 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))
+		if err != nil {
+			return false, nil
+		}
+		if header == nil {
+			// No block.
+			slot--
+			continue
+		}
+		if !header.Canonical {
+			// Not canonical.
+			slot--
+			continue
+		}
+		return bytes.Equal(header.Root[:], attestation.Data.BeaconBlockRoot[:]), nil
+	}
+}
+
+func calcTargetCorrect(ctx context.Context, data *dataIn, attestation *phase0.Attestation) (bool, error) {
+	// 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))
+		if err != nil {
+			return false, nil
+		}
+		if header == nil {
+			// No block.
+			slot--
+			continue
+		}
+		if !header.Canonical {
+			// Not canonical.
+			slot--
+			continue
+		}
+		return bytes.Equal(header.Root[:], attestation.Data.Target.Root[:]), nil
+	}
+}
+
+func duty(ctx context.Context, eth2Client eth2client.Service, validator *api.Validator, epoch phase0.Epoch, slotsPerEpoch uint64) (*api.AttesterDuty, error) {
 	// Find the attesting slot for the given epoch.
-	duties, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, epoch, []spec.ValidatorIndex{validator.Index})
+	duties, err := eth2Client.(eth2client.AttesterDutiesProvider).AttesterDuties(ctx, epoch, []phase0.ValidatorIndex{validator.Index})
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain attester duties")
 	}

cmd/attesterinclusion.go

@@ -49,6 +49,7 @@ func init() {
 	attesterFlags(attesterInclusionCmd)
 	attesterInclusionCmd.Flags().Int64("epoch", -1, "the last complete epoch")
 	attesterInclusionCmd.Flags().String("pubkey", "", "the public key of the attester")
+	attesterInclusionCmd.Flags().Int64("index", -1, "the index of the attester")
 }
 
 func attesterInclusionBindings() {
@@ -58,4 +59,7 @@ func attesterInclusionBindings() {
 	if err := viper.BindPFlag("pubkey", attesterInclusionCmd.Flags().Lookup("pubkey")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("index", attesterInclusionCmd.Flags().Lookup("index")); err != nil {
+		panic(err)
+	}
 }

cmd/block/analyze/command.go

@@ -0,0 +1,136 @@
+// Copyright © 2022 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 blockanalyze
+
+import (
+	"context"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/go-bitfield"
+	"github.com/spf13/viper"
+	"github.com/wealdtech/ethdo/services/chaintime"
+)
+
+type command struct {
+	quiet   bool
+	verbose bool
+	debug   bool
+
+	// Beacon node connection.
+	timeout                  time.Duration
+	connection               string
+	allowInsecureConnections bool
+
+	// Operation.
+	blockID    string
+	stream     bool
+	jsonOutput bool
+
+	// Data access.
+	eth2Client           eth2client.Service
+	chainTime            chaintime.Service
+	blocksProvider       eth2client.SignedBeaconBlockProvider
+	blockHeadersProvider eth2client.BeaconBlockHeadersProvider
+
+	// Constants.
+	timelySourceWeight uint64
+	timelyTargetWeight uint64
+	timelyHeadWeight   uint64
+	syncRewardWeight   uint64
+	proposerWeight     uint64
+	weightDenominator  uint64
+
+	// Processing.
+	priorAttestations map[string]*attestationData
+	// Head roots provides the root of the head slot at given slots.
+	headRoots map[phase0.Slot]phase0.Root
+	// Target roots provides the root of the target epoch at given slots.
+	targetRoots map[phase0.Slot]phase0.Root
+
+	// Block info.
+	// Map is slot -> committee index -> validator committee index -> votes.
+	votes map[phase0.Slot]map[phase0.CommitteeIndex]bitfield.Bitlist
+
+	// Results.
+	analysis *blockAnalysis
+}
+
+type blockAnalysis struct {
+	Slot         phase0.Slot            `json:"slot"`
+	Attestations []*attestationAnalysis `json:"attestations"`
+	SyncCommitee *syncCommitteeAnalysis `json:"sync_committee"`
+	Value        float64                `json:"value"`
+}
+
+type attestationAnalysis struct {
+	Head          phase0.Root      `json:"head"`
+	Target        phase0.Root      `json:"target"`
+	Distance      int              `json:"distance"`
+	Duplicate     *attestationData `json:"duplicate,omitempty"`
+	NewVotes      int              `json:"new_votes"`
+	Votes         int              `json:"votes"`
+	PossibleVotes int              `json:"possible_votes"`
+	HeadCorrect   bool             `json:"head_correct"`
+	HeadTimely    bool             `json:"head_timely"`
+	SourceTimely  bool             `json:"source_timely"`
+	TargetCorrect bool             `json:"target_correct"`
+	TargetTimely  bool             `json:"target_timely"`
+	Score         float64          `json:"score"`
+	Value         float64          `json:"value"`
+}
+
+type syncCommitteeAnalysis struct {
+	Contributions         int     `json:"contributions"`
+	PossibleContributions int     `json:"possible_contributions"`
+	Score                 float64 `json:"score"`
+	Value                 float64 `json:"value"`
+}
+
+type attestationData struct {
+	Block phase0.Slot `json:"block"`
+	Index int         `json:"index"`
+}
+
+func newCommand(ctx context.Context) (*command, error) {
+	c := &command{
+		quiet:             viper.GetBool("quiet"),
+		verbose:           viper.GetBool("verbose"),
+		debug:             viper.GetBool("debug"),
+		priorAttestations: make(map[string]*attestationData),
+		headRoots:         make(map[phase0.Slot]phase0.Root),
+		targetRoots:       make(map[phase0.Slot]phase0.Root),
+		votes:             make(map[phase0.Slot]map[phase0.CommitteeIndex]bitfield.Bitlist),
+	}
+
+	// Timeout.
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	c.timeout = viper.GetDuration("timeout")
+
+	if viper.GetString("connection") == "" {
+		return nil, errors.New("connection is required")
+	}
+	c.connection = viper.GetString("connection")
+	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+
+	c.blockID = viper.GetString("blockid")
+	c.stream = viper.GetBool("stream")
+	c.jsonOutput = viper.GetBool("json")
+
+	return c, nil
+}

cmd/block/analyze/command_internal_test.go

@@ -0,0 +1,82 @@
+// Copyright © 2022 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 blockanalyze
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInput(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: "TimeoutMissing",
+			vars: map[string]interface{}{},
+			err:  "timeout is required",
+		},
+		{
+			name: "ConnectionMissing",
+			vars: map[string]interface{}{
+				"validators": "1",
+				"timeout":    "5s",
+			},
+			err: "connection is required",
+		},
+		{
+			name: "ValidatorsZero",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"validators": "0",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+			err: "validators must be at least 1",
+		},
+		{
+			name: "Good",
+			vars: map[string]interface{}{
+				"validators": "1",
+				"timeout":    "5s",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			_, err := newCommand(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

cmd/block/analyze/output.go

@@ -0,0 +1,157 @@
+// Copyright © 2022 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 blockanalyze
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+)
+
+func (c *command) output(ctx context.Context) (string, error) {
+	if c.quiet {
+		return "", nil
+	}
+
+	if c.jsonOutput {
+		return c.outputJSON(ctx)
+	}
+
+	return c.outputTxt(ctx)
+}
+
+type attestationAnalysisJSON struct {
+	Head          string           `json:"head"`
+	Target        string           `json:"target"`
+	Distance      int              `json:"distance"`
+	Duplicate     *attestationData `json:"duplicate,omitempty"`
+	NewVotes      int              `json:"new_votes"`
+	Votes         int              `json:"votes"`
+	PossibleVotes int              `json:"possible_votes"`
+	HeadCorrect   bool             `json:"head_correct"`
+	HeadTimely    bool             `json:"head_timely"`
+	SourceTimely  bool             `json:"source_timely"`
+	TargetCorrect bool             `json:"target_correct"`
+	TargetTimely  bool             `json:"target_timely"`
+	Score         float64          `json:"score"`
+	Value         float64          `json:"value"`
+}
+
+func (a *attestationAnalysis) MarshalJSON() ([]byte, error) {
+	return json.Marshal(attestationAnalysisJSON{
+		Head:          fmt.Sprintf("%#x", a.Head),
+		Target:        fmt.Sprintf("%#x", a.Target),
+		Distance:      a.Distance,
+		Duplicate:     a.Duplicate,
+		NewVotes:      a.NewVotes,
+		Votes:         a.Votes,
+		PossibleVotes: a.PossibleVotes,
+		HeadCorrect:   a.HeadCorrect,
+		HeadTimely:    a.HeadTimely,
+		SourceTimely:  a.SourceTimely,
+		TargetCorrect: a.TargetCorrect,
+		TargetTimely:  a.TargetTimely,
+		Score:         a.Score,
+		Value:         a.Value,
+	})
+}
+
+func (c *command) outputJSON(_ context.Context) (string, error) {
+	data, err := json.Marshal(c.analysis)
+	if err != nil {
+		return "", err
+	}
+	return string(data), nil
+}
+
+func (c *command) outputTxt(_ context.Context) (string, error) {
+	builder := strings.Builder{}
+
+	for i, attestation := range c.analysis.Attestations {
+		if c.verbose {
+			builder.WriteString("Attestation ")
+			builder.WriteString(fmt.Sprintf("%d", i))
+			builder.WriteString(": ")
+			builder.WriteString("distance ")
+			builder.WriteString(fmt.Sprintf("%d", attestation.Distance))
+			builder.WriteString(", ")
+
+			if attestation.Duplicate != nil {
+				builder.WriteString("duplicate of attestation ")
+				builder.WriteString(fmt.Sprintf("%d", 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("/")
+			builder.WriteString(fmt.Sprintf("%d", attestation.Votes))
+			builder.WriteString("/")
+			builder.WriteString(fmt.Sprintf("%d", attestation.PossibleVotes))
+			builder.WriteString(" new/total/possible votes")
+			if attestation.NewVotes == 0 {
+				builder.WriteString("\n")
+				continue
+			} else {
+				builder.WriteString(", ")
+			}
+			switch {
+			case !attestation.HeadCorrect:
+				builder.WriteString("head vote incorrect, ")
+			case !attestation.HeadTimely:
+				builder.WriteString("head vote correct but late, ")
+			}
+
+			if !attestation.SourceTimely {
+				builder.WriteString("source vote late, ")
+			}
+
+			switch {
+			case !attestation.TargetCorrect:
+				builder.WriteString("target vote incorrect, ")
+			case !attestation.TargetTimely:
+				builder.WriteString("target vote correct but late, ")
+			}
+
+			builder.WriteString("score ")
+			builder.WriteString(fmt.Sprintf("%0.3f", attestation.Score))
+			builder.WriteString(", value ")
+			builder.WriteString(fmt.Sprintf("%0.3f", attestation.Value))
+			builder.WriteString("\n")
+		}
+	}
+
+	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(" contributions, score ")
+			builder.WriteString(fmt.Sprintf("%0.3f", c.analysis.SyncCommitee.Score))
+			builder.WriteString(", value ")
+			builder.WriteString(fmt.Sprintf("%0.3f", c.analysis.SyncCommitee.Value))
+			builder.WriteString("\n")
+		}
+	}
+
+	builder.WriteString("Value for block ")
+	builder.WriteString(fmt.Sprintf("%d", c.analysis.Slot))
+	builder.WriteString(": ")
+	builder.WriteString(fmt.Sprintf("%0.3f", c.analysis.Value))
+	builder.WriteString("\n")
+
+	return builder.String(), nil
+}

cmd/block/analyze/process.go

@@ -0,0 +1,431 @@
+// Copyright © 2022 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 blockanalyze
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+
+	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/prysmaticlabs/go-bitfield"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
+	"github.com/wealdtech/ethdo/util"
+)
+
+func (c *command) process(ctx context.Context) error {
+	// Obtain information we need to process.
+	if err := c.setup(ctx); err != nil {
+		return err
+	}
+
+	block, err := c.blocksProvider.SignedBeaconBlock(ctx, c.blockID)
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain beacon block")
+	}
+	if block == nil {
+		return errors.New("empty beacon block")
+	}
+
+	slot, err := block.Slot()
+	if err != nil {
+		return err
+	}
+	attestations, err := block.Attestations()
+	if err != nil {
+		return err
+	}
+
+	c.analysis = &blockAnalysis{
+		Slot: slot,
+	}
+
+	// Calculate how many parents we need to fetch.
+	minSlot := slot
+	for _, attestation := range attestations {
+		if attestation.Data.Slot < minSlot {
+			minSlot = attestation.Data.Slot
+		}
+	}
+	if c.debug {
+		fmt.Printf("Need to fetch blocks to slot %d\n", minSlot)
+	}
+
+	if err := c.fetchParents(ctx, block, minSlot); err != nil {
+		return err
+	}
+
+	return c.analyze(ctx, block)
+}
+
+func (c *command) analyze(ctx context.Context, block *spec.VersionedSignedBeaconBlock) error {
+	if err := c.analyzeAttestations(ctx, block); err != nil {
+		return err
+	}
+
+	if err := c.analyzeSyncCommittees(ctx, block); err != nil {
+		return err
+	}
+
+	return nil
+}
+
+func (c *command) analyzeAttestations(ctx context.Context, block *spec.VersionedSignedBeaconBlock) error {
+	attestations, err := block.Attestations()
+	if err != nil {
+		return err
+	}
+	slot, err := block.Slot()
+	if err != nil {
+		return err
+	}
+
+	c.analysis.Attestations = make([]*attestationAnalysis, len(attestations))
+
+	blockVotes := make(map[phase0.Slot]map[phase0.CommitteeIndex]bitfield.Bitlist)
+	for i, attestation := range attestations {
+		if c.debug {
+			fmt.Printf("Processing attestation %d\n", i)
+		}
+		analysis := &attestationAnalysis{
+			Head:     attestation.Data.BeaconBlockRoot,
+			Target:   attestation.Data.Target.Root,
+			Distance: int(slot - attestation.Data.Slot),
+		}
+
+		root, err := attestation.HashTreeRoot()
+		if err != nil {
+			return err
+		}
+		if info, exists := c.priorAttestations[fmt.Sprintf("%#x", root)]; exists {
+			analysis.Duplicate = info
+		} else {
+			data := attestation.Data
+			_, exists := blockVotes[data.Slot]
+			if !exists {
+				blockVotes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+			}
+			_, exists = blockVotes[data.Slot][data.Index]
+			if !exists {
+				blockVotes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
+			}
+
+			// Count new votes.
+			analysis.PossibleVotes = int(attestation.AggregationBits.Len())
+			for j := uint64(0); j < attestation.AggregationBits.Len(); j++ {
+				if attestation.AggregationBits.BitAt(j) {
+					analysis.Votes++
+					if blockVotes[data.Slot][data.Index].BitAt(j) {
+						// Already attested to in this block; skip.
+						continue
+					}
+					if c.votes[data.Slot][data.Index].BitAt(j) {
+						// Already attested to in a previous block; skip.
+						continue
+					}
+					analysis.NewVotes++
+					blockVotes[data.Slot][data.Index].SetBitAt(j, true)
+				}
+			}
+			// Calculate head correct.
+			var err error
+			analysis.HeadCorrect, err = c.calcHeadCorrect(ctx, attestation)
+			if err != nil {
+				return err
+			}
+
+			// Calculate head timely.
+			analysis.HeadTimely = attestation.Data.Slot == slot-1
+
+			// Calculate source timely.
+			analysis.SourceTimely = attestation.Data.Slot >= slot-5
+
+			// Calculate target correct.
+			analysis.TargetCorrect, err = c.calcTargetCorrect(ctx, attestation)
+			if err != nil {
+				return err
+			}
+
+			// Calculate target timely.
+			analysis.TargetTimely = attestation.Data.Slot >= slot-32
+		}
+
+		// Calculate score and value.
+		if analysis.TargetCorrect && analysis.TargetTimely {
+			analysis.Score += float64(c.timelyTargetWeight) / float64(c.weightDenominator)
+		}
+		if analysis.SourceTimely {
+			analysis.Score += float64(c.timelySourceWeight) / float64(c.weightDenominator)
+		}
+		if analysis.HeadCorrect && analysis.HeadTimely {
+			analysis.Score += float64(c.timelyHeadWeight) / float64(c.weightDenominator)
+		}
+		analysis.Value = analysis.Score * float64(analysis.NewVotes)
+		c.analysis.Value += analysis.Value
+
+		c.analysis.Attestations[i] = analysis
+	}
+
+	return nil
+}
+
+func (c *command) fetchParents(ctx context.Context, block *spec.VersionedSignedBeaconBlock, minSlot phase0.Slot) error {
+	parentRoot, err := block.ParentRoot()
+	if err != nil {
+		return err
+	}
+
+	// Obtain the parent block.
+	parentBlock, err := c.blocksProvider.SignedBeaconBlock(ctx, fmt.Sprintf("%#x", parentRoot))
+	if err != nil {
+		return err
+	}
+	if parentBlock == nil {
+		return fmt.Errorf("unable to obtain parent block %s", parentBlock)
+	}
+
+	parentSlot, err := parentBlock.Slot()
+	if err != nil {
+		return err
+	}
+	if parentSlot < minSlot {
+		return nil
+	}
+
+	if err := c.processParentBlock(ctx, parentBlock); err != nil {
+		return err
+	}
+
+	return c.fetchParents(ctx, parentBlock, minSlot)
+}
+
+func (c *command) processParentBlock(ctx context.Context, block *spec.VersionedSignedBeaconBlock) error {
+	attestations, err := block.Attestations()
+	if err != nil {
+		return err
+	}
+	slot, err := block.Slot()
+	if err != nil {
+		return err
+	}
+	if c.debug {
+		fmt.Printf("Processing block %d\n", slot)
+	}
+
+	for i, attestation := range attestations {
+		root, err := attestation.HashTreeRoot()
+		if err != nil {
+			return err
+		}
+		c.priorAttestations[fmt.Sprintf("%#x", root)] = &attestationData{
+			Block: slot,
+			Index: i,
+		}
+
+		data := attestation.Data
+		_, exists := c.votes[data.Slot]
+		if !exists {
+			c.votes[data.Slot] = make(map[phase0.CommitteeIndex]bitfield.Bitlist)
+		}
+		_, exists = c.votes[data.Slot][data.Index]
+		if !exists {
+			c.votes[data.Slot][data.Index] = bitfield.NewBitlist(attestation.AggregationBits.Len())
+		}
+		for j := uint64(0); j < attestation.AggregationBits.Len(); j++ {
+			if attestation.AggregationBits.BitAt(j) {
+				c.votes[data.Slot][data.Index].SetBitAt(j, true)
+			}
+		}
+	}
+
+	return nil
+}
+
+func (c *command) setup(ctx context.Context) error {
+	var err error
+
+	// Connect to the client.
+	c.eth2Client, err = util.ConnectToBeaconNode(ctx, c.connection, c.timeout, c.allowInsecureConnections)
+	if err != nil {
+		return errors.Wrap(err, "failed to connect to beacon node")
+	}
+
+	c.chainTime, err = standardchaintime.New(ctx,
+		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
+		standardchaintime.WithForkScheduleProvider(c.eth2Client.(eth2client.ForkScheduleProvider)),
+		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+	)
+	if err != nil {
+		return errors.Wrap(err, "failed to set up chaintime service")
+	}
+
+	// Obtain the number of active validators.
+	var isProvider bool
+	c.blocksProvider, isProvider = c.eth2Client.(eth2client.SignedBeaconBlockProvider)
+	if !isProvider {
+		return errors.New("connection does not provide signed beacon block information")
+	}
+	c.blockHeadersProvider, isProvider = c.eth2Client.(eth2client.BeaconBlockHeadersProvider)
+	if !isProvider {
+		return errors.New("connection does not provide beacon block header information")
+	}
+
+	specProvider, isProvider := c.eth2Client.(eth2client.SpecProvider)
+	if !isProvider {
+		return errors.New("connection does not provide spec information")
+	}
+
+	spec, err := specProvider.Spec(ctx)
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain spec")
+	}
+
+	tmp, exists := spec["TIMELY_SOURCE_WEIGHT"]
+	if !exists {
+		// Set a default value based on the Altair spec.
+		tmp = uint64(14)
+	}
+	var ok bool
+	c.timelySourceWeight, ok = tmp.(uint64)
+	if !ok {
+		return errors.New("TIMELY_SOURCE_WEIGHT of unexpected type")
+	}
+
+	tmp, exists = spec["TIMELY_TARGET_WEIGHT"]
+	if !exists {
+		// Set a default value based on the Altair spec.
+		tmp = uint64(26)
+	}
+	c.timelyTargetWeight, ok = tmp.(uint64)
+	if !ok {
+		return errors.New("TIMELY_TARGET_WEIGHT of unexpected type")
+	}
+
+	tmp, exists = spec["TIMELY_HEAD_WEIGHT"]
+	if !exists {
+		// Set a default value based on the Altair spec.
+		tmp = uint64(14)
+	}
+	c.timelyHeadWeight, ok = tmp.(uint64)
+	if !ok {
+		return errors.New("TIMELY_HEAD_WEIGHT of unexpected type")
+	}
+
+	tmp, exists = spec["SYNC_REWARD_WEIGHT"]
+	if !exists {
+		// Set a default value based on the Altair spec.
+		tmp = uint64(2)
+	}
+	c.syncRewardWeight, ok = tmp.(uint64)
+	if !ok {
+		return errors.New("SYNC_REWARD_WEIGHT of unexpected type")
+	}
+
+	tmp, exists = spec["PROPOSER_WEIGHT"]
+	if !exists {
+		// Set a default value based on the Altair spec.
+		tmp = uint64(8)
+	}
+	c.proposerWeight, ok = tmp.(uint64)
+	if !ok {
+		return errors.New("PROPOSER_WEIGHT of unexpected type")
+	}
+
+	tmp, exists = spec["WEIGHT_DENOMINATOR"]
+	if !exists {
+		// Set a default value based on the Altair spec.
+		tmp = uint64(64)
+	}
+	c.weightDenominator, ok = tmp.(uint64)
+	if !ok {
+		return errors.New("WEIGHT_DENOMINATOR of unexpected type")
+	}
+	return nil
+}
+
+func (c *command) calcHeadCorrect(ctx context.Context, attestation *phase0.Attestation) (bool, error) {
+	slot := attestation.Data.Slot
+	root, exists := c.headRoots[slot]
+	if !exists {
+		for {
+			header, err := c.blockHeadersProvider.BeaconBlockHeader(ctx, fmt.Sprintf("%d", slot))
+			if err != nil {
+				return false, nil
+			}
+			if header == nil {
+				// No block.
+				slot--
+				continue
+			}
+			if !header.Canonical {
+				// Not canonical.
+				slot--
+				continue
+			}
+			c.headRoots[attestation.Data.Slot] = header.Root
+			root = header.Root
+			break
+		}
+	}
+
+	return bytes.Equal(root[:], attestation.Data.BeaconBlockRoot[:]), nil
+}
+
+func (c *command) calcTargetCorrect(ctx context.Context, attestation *phase0.Attestation) (bool, error) {
+	root, exists := c.targetRoots[attestation.Data.Slot]
+	if !exists {
+		// Start with first slot of the target epoch.
+		slot := c.chainTime.FirstSlotOfEpoch(attestation.Data.Target.Epoch)
+		for {
+			header, err := c.blockHeadersProvider.BeaconBlockHeader(ctx, fmt.Sprintf("%d", slot))
+			if err != nil {
+				return false, nil
+			}
+			if header == nil {
+				// No block.
+				slot--
+				continue
+			}
+			if !header.Canonical {
+				// Not canonical.
+				slot--
+				continue
+			}
+			c.targetRoots[attestation.Data.Slot] = header.Root
+			root = header.Root
+			break
+		}
+	}
+	return bytes.Equal(root[:], attestation.Data.Target.Root[:]), nil
+}
+
+func (c *command) analyzeSyncCommittees(ctx context.Context, block *spec.VersionedSignedBeaconBlock) error {
+	c.analysis.SyncCommitee = &syncCommitteeAnalysis{}
+	switch block.Version {
+	case spec.DataVersionPhase0:
+		return nil
+	case spec.DataVersionAltair:
+		c.analysis.SyncCommitee.Contributions = int(block.Altair.Message.Body.SyncAggregate.SyncCommitteeBits.Count())
+		c.analysis.SyncCommitee.PossibleContributions = int(block.Altair.Message.Body.SyncAggregate.SyncCommitteeBits.Len())
+		c.analysis.SyncCommitee.Score = float64(c.syncRewardWeight) / float64(c.weightDenominator)
+		c.analysis.SyncCommitee.Value = c.analysis.SyncCommitee.Score * float64(c.analysis.SyncCommitee.Contributions)
+		c.analysis.Value += c.analysis.SyncCommitee.Value
+		return nil
+	default:
+		return fmt.Errorf("unsupported block version %d", block.Version)
+	}
+}

cmd/block/analyze/process_internal_test.go

@@ -0,0 +1,63 @@
+// Copyright © 2022 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 blockanalyze
+
+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: "InvalidData",
+			vars: map[string]interface{}{
+				"timeout":    "60s",
+				"validators": "1",
+				"data":       "[[",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			cmd, err := newCommand(context.Background())
+			require.NoError(t, err)
+			err = cmd.process(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

cmd/block/analyze/run.go

@@ -0,0 +1,50 @@
+// Copyright © 2022 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 blockanalyze
+
+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/block/info/input.go

@@ -32,6 +32,7 @@ type dataIn struct {
 	// Operation.
 	eth2Client eth2client.Service
 	jsonOutput bool
+	sszOutput  bool
 	// Chain information.
 	blockID string
 	stream  bool
@@ -48,13 +49,14 @@ func input(ctx context.Context) (*dataIn, error) {
 	data.verbose = viper.GetBool("verbose")
 	data.debug = viper.GetBool("debug")
 	data.jsonOutput = viper.GetBool("json")
+	data.sszOutput = viper.GetBool("ssz")
 
 	data.stream = viper.GetBool("stream")
 
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, viper.GetString("connection"), viper.GetDuration("timeout"), viper.GetBool("allow-insecure-connections"))
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to connect to Ethereum 2 beacon node")
+		return nil, err
 	}
 
 	if viper.GetString("blockid") == "" {

cmd/block/info/input_internal_test.go

@@ -66,7 +66,7 @@ func TestInput(t *testing.T) {
 			vars: map[string]interface{}{
 				"timeout": "5s",
 			},
-			err: "failed to connect to Ethereum 2 beacon node: failed to connect to beacon node: problem with parameters: no address specified",
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
 		},
 		{
 			name: "ConnectionBad",
@@ -79,7 +79,7 @@ func TestInput(t *testing.T) {
 				timeout: 5 * time.Second,
 				blockID: "justified",
 			},
-			err: "failed to connect to Ethereum 2 beacon node: failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
 		},
 		{
 			name: "BlockIDNil",

cmd/block/info/output.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019, 2020, 2021 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
@@ -18,13 +18,16 @@ import (
 	"context"
 	"encoding/hex"
 	"fmt"
+	"math/big"
 	"sort"
 	"strings"
 	"time"
 	"unicode/utf8"
 
 	eth2client "github.com/attestantio/go-eth2-client"
-	spec "github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/attestantio/go-eth2-client/spec/altair"
+	"github.com/attestantio/go-eth2-client/spec/bellatrix"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/wealdtech/go-string2eth"
@@ -47,34 +50,44 @@ func output(ctx context.Context, data *dataOut) (string, error) {
 	return "", nil
 }
 
-func outputBlockGeneral(ctx context.Context, verbose bool, block *spec.BeaconBlock, genesisTime time.Time, slotDuration time.Duration, slotsPerEpoch uint64) (string, error) {
-	bodyRoot, err := block.Body.HashTreeRoot()
-	if err != nil {
-		return "", errors.Wrap(err, "failed to generate block root")
-	}
-
+func outputBlockGeneral(ctx context.Context,
+	verbose bool,
+	slot phase0.Slot,
+	blockRoot phase0.Root,
+	bodyRoot phase0.Root,
+	parentRoot phase0.Root,
+	stateRoot phase0.Root,
+	graffiti []byte,
+	genesisTime time.Time,
+	slotDuration time.Duration,
+	slotsPerEpoch uint64,
+) (
+	string,
+	error,
+) {
 	res := strings.Builder{}
 
-	res.WriteString(fmt.Sprintf("Slot: %d\n", block.Slot))
-	res.WriteString(fmt.Sprintf("Epoch: %d\n", spec.Epoch(uint64(block.Slot)/slotsPerEpoch)))
-	res.WriteString(fmt.Sprintf("Timestamp: %v\n", time.Unix(genesisTime.Unix()+int64(block.Slot)*int64(slotDuration.Seconds()), 0)))
-	res.WriteString(fmt.Sprintf("Block root: %#x\n", bodyRoot))
+	res.WriteString(fmt.Sprintf("Slot: %d\n", slot))
+	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))
 	if verbose {
-		res.WriteString(fmt.Sprintf("Parent root: %#x\n", block.ParentRoot))
-		res.WriteString(fmt.Sprintf("State root: %#x\n", block.StateRoot))
+		res.WriteString(fmt.Sprintf("Body root: %#x\n", bodyRoot))
+		res.WriteString(fmt.Sprintf("Parent root: %#x\n", parentRoot))
+		res.WriteString(fmt.Sprintf("State root: %#x\n", stateRoot))
 	}
-	if len(block.Body.Graffiti) > 0 && hex.EncodeToString(block.Body.Graffiti) != "0000000000000000000000000000000000000000000000000000000000000000" {
-		if utf8.Valid(block.Body.Graffiti) {
-			res.WriteString(fmt.Sprintf("Graffiti: %s\n", string(block.Body.Graffiti)))
+	if len(graffiti) > 0 && hex.EncodeToString(graffiti) != "0000000000000000000000000000000000000000000000000000000000000000" {
+		if utf8.Valid(graffiti) {
+			res.WriteString(fmt.Sprintf("Graffiti: %s\n", strings.TrimRight(string(graffiti), "\u0000")))
 		} else {
-			res.WriteString(fmt.Sprintf("Graffiti: %#x\n", block.Body.Graffiti))
+			res.WriteString(fmt.Sprintf("Graffiti: %#x\n", graffiti))
 		}
 	}
 
 	return res.String(), nil
 }
 
-func outputBlockETH1Data(ctx context.Context, eth1Data *spec.ETH1Data) (string, error) {
+func outputBlockETH1Data(ctx context.Context, eth1Data *phase0.ETH1Data) (string, error) {
 	res := strings.Builder{}
 
 	res.WriteString(fmt.Sprintf("Ethereum 1 deposit count: %d\n", eth1Data.DepositCount))
@@ -84,10 +97,10 @@ func outputBlockETH1Data(ctx context.Context, eth1Data *spec.ETH1Data) (string,
 	return res.String(), nil
 }
 
-func outputBlockAttestations(ctx context.Context, eth2Client eth2client.Service, verbose bool, attestations []*spec.Attestation) (string, error) {
+func outputBlockAttestations(ctx context.Context, eth2Client eth2client.Service, verbose bool, attestations []*phase0.Attestation) (string, error) {
 	res := strings.Builder{}
 
-	validatorCommittees := make(map[spec.Slot]map[spec.CommitteeIndex][]spec.ValidatorIndex)
+	validatorCommittees := make(map[phase0.Slot]map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
 	res.WriteString(fmt.Sprintf("Attestations: %d\n", len(attestations)))
 	if verbose {
 		beaconCommitteesProvider, isProvider := eth2Client.(eth2client.BeaconCommitteesProvider)
@@ -100,21 +113,25 @@ func outputBlockAttestations(ctx context.Context, eth2Client eth2client.Service,
 				if !exists {
 					beaconCommittees, err := beaconCommitteesProvider.BeaconCommittees(ctx, fmt.Sprintf("%d", att.Data.Slot))
 					if err != nil {
-						return "", errors.Wrap(err, "failed to obtain beacon committees")
-					}
-					for _, beaconCommittee := range beaconCommittees {
-						if _, exists := validatorCommittees[beaconCommittee.Slot]; !exists {
-							validatorCommittees[beaconCommittee.Slot] = make(map[spec.CommitteeIndex][]spec.ValidatorIndex)
+						// 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 {
+							if _, exists := validatorCommittees[beaconCommittee.Slot]; !exists {
+								validatorCommittees[beaconCommittee.Slot] = make(map[phase0.CommitteeIndex][]phase0.ValidatorIndex)
+							}
+							validatorCommittees[beaconCommittee.Slot][beaconCommittee.Index] = beaconCommittee.Validators
 						}
-						validatorCommittees[beaconCommittee.Slot][beaconCommittee.Index] = beaconCommittee.Validators
 					}
 					committees = validatorCommittees[att.Data.Slot]
 				}
 
 				res.WriteString(fmt.Sprintf("    Committee index: %d\n", att.Data.Index))
 				res.WriteString(fmt.Sprintf("    Attesters: %d/%d\n", att.AggregationBits.Count(), att.AggregationBits.Len()))
-				res.WriteString(fmt.Sprintf("    Aggregation bits: %s\n", bitsToString(att.AggregationBits)))
-				res.WriteString(fmt.Sprintf("    Attesting indices: %s\n", attestingIndices(att.AggregationBits, committees[att.Data.Index])))
+				res.WriteString(fmt.Sprintf("    Aggregation bits: %s\n", bitlistToString(att.AggregationBits)))
+				if _, exists := committees[att.Data.Index]; exists {
+					res.WriteString(fmt.Sprintf("    Attesting indices: %s\n", attestingIndices(att.AggregationBits, committees[att.Data.Index])))
+				}
 				res.WriteString(fmt.Sprintf("    Slot: %d\n", att.Data.Slot))
 				res.WriteString(fmt.Sprintf("    Beacon block root: %#x\n", att.Data.BeaconBlockRoot))
 				res.WriteString(fmt.Sprintf("    Source epoch: %d\n", att.Data.Source.Epoch))
@@ -128,7 +145,7 @@ func outputBlockAttestations(ctx context.Context, eth2Client eth2client.Service,
 	return res.String(), nil
 }
 
-func outputBlockAttesterSlashings(ctx context.Context, eth2Client eth2client.Service, verbose bool, attesterSlashings []*spec.AttesterSlashing) (string, error) {
+func outputBlockAttesterSlashings(ctx context.Context, eth2Client eth2client.Service, verbose bool, attesterSlashings []*phase0.AttesterSlashing) (string, error) {
 	res := strings.Builder{}
 
 	res.WriteString(fmt.Sprintf("Attester slashings: %d\n", len(attesterSlashings)))
@@ -175,7 +192,7 @@ func outputBlockAttesterSlashings(ctx context.Context, eth2Client eth2client.Ser
 	return res.String(), nil
 }
 
-func outputBlockDeposits(ctx context.Context, verbose bool, deposits []*spec.Deposit) (string, error) {
+func outputBlockDeposits(ctx context.Context, verbose bool, deposits []*phase0.Deposit) (string, error) {
 	res := strings.Builder{}
 
 	// Deposits.
@@ -194,14 +211,14 @@ func outputBlockDeposits(ctx context.Context, verbose bool, deposits []*spec.Dep
 	return res.String(), nil
 }
 
-func outputBlockVoluntaryExits(ctx context.Context, eth2Client eth2client.Service, verbose bool, voluntaryExits []*spec.SignedVoluntaryExit) (string, error) {
+func outputBlockVoluntaryExits(ctx context.Context, eth2Client eth2client.Service, verbose bool, voluntaryExits []*phase0.SignedVoluntaryExit) (string, error) {
 	res := strings.Builder{}
 
 	res.WriteString(fmt.Sprintf("Voluntary exits: %d\n", len(voluntaryExits)))
 	if verbose {
 		for i, voluntaryExit := range voluntaryExits {
 			res.WriteString(fmt.Sprintf("  %d:\n", i))
-			validators, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, "head", []spec.ValidatorIndex{voluntaryExit.Message.ValidatorIndex})
+			validators, err := eth2Client.(eth2client.ValidatorsProvider).Validators(ctx, "head", []phase0.ValidatorIndex{voluntaryExit.Message.ValidatorIndex})
 			if err != nil {
 				res.WriteString(fmt.Sprintf("  Error: failed to obtain validators: %v\n", err))
 			} else {
@@ -214,7 +231,45 @@ func outputBlockVoluntaryExits(ctx context.Context, eth2Client eth2client.Servic
 	return res.String(), nil
 }
 
-func outputBlockText(ctx context.Context, data *dataOut, signedBlock *spec.SignedBeaconBlock) (string, error) {
+func outputBlockSyncAggregate(ctx context.Context, eth2Client eth2client.Service, verbose bool, syncAggregate *altair.SyncAggregate, epoch phase0.Epoch) (string, error) {
+	res := strings.Builder{}
+
+	res.WriteString("Sync aggregate: ")
+	res.WriteString(fmt.Sprintf("%d/%d\n", syncAggregate.SyncCommitteeBits.Count(), syncAggregate.SyncCommitteeBits.Len()))
+	if verbose {
+		specProvider, isProvider := eth2Client.(eth2client.SpecProvider)
+		if isProvider {
+			config, err := specProvider.Spec(ctx)
+			if err == nil {
+				slotsPerEpoch := config["SLOTS_PER_EPOCH"].(uint64)
+
+				res.WriteString("  Contributions: ")
+				res.WriteString(bitvectorToString(syncAggregate.SyncCommitteeBits))
+				res.WriteString("\n")
+
+				syncCommitteesProvider, isProvider := eth2Client.(eth2client.SyncCommitteesProvider)
+				if isProvider {
+					syncCommittee, err := syncCommitteesProvider.SyncCommittee(ctx, fmt.Sprintf("%d", uint64(epoch)*slotsPerEpoch))
+					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("\n")
+					}
+				}
+			}
+		}
+	}
+
+	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")
 	}
@@ -224,7 +279,199 @@ func outputBlockText(ctx context.Context, data *dataOut, signedBlock *spec.Signe
 	res := strings.Builder{}
 
 	// General info.
-	tmp, err := outputBlockGeneral(ctx, data.verbose, signedBlock.Message, data.genesisTime, data.slotDuration, data.slotsPerEpoch)
+	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,
+		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 = outputBlockExecutionPayload(ctx, data.verbose, signedBlock.Message.Body.ExecutionPayload)
+	if err != nil {
+		return "", err
+	}
+	res.WriteString(tmp)
+
+	return res.String(), nil
+}
+
+func outputAltairBlockText(ctx context.Context, data *dataOut, signedBlock *altair.SignedBeaconBlock) (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,
+		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)
+
+	return res.String(), nil
+}
+
+func outputPhase0BlockText(ctx context.Context, data *dataOut, signedBlock *phase0.SignedBeaconBlock) (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 block root")
+	}
+	tmp, err := outputBlockGeneral(ctx,
+		data.verbose,
+		signedBlock.Message.Slot,
+		blockRoot,
+		bodyRoot,
+		signedBlock.Message.ParentRoot,
+		signedBlock.Message.StateRoot,
+		signedBlock.Message.Body.Graffiti,
+		data.genesisTime,
+		data.slotDuration,
+		data.slotsPerEpoch)
 	if err != nil {
 		return "", err
 	}
@@ -272,11 +519,61 @@ func outputBlockText(ctx context.Context, data *dataOut, signedBlock *spec.Signe
 	return res.String(), nil
 }
 
+func outputBlockExecutionPayload(ctx context.Context,
+	verbose bool,
+	payload *bellatrix.ExecutionPayload,
+) (
+	string,
+	error,
+) {
+	if payload == nil {
+		return "", nil
+	}
+
+	res := strings.Builder{}
+	res.WriteString("Execution payload:\n")
+	res.WriteString("  Execution block number: ")
+	res.WriteString(fmt.Sprintf("%d\n", payload.BlockNumber))
+	if verbose {
+		baseFeePerGasBEBytes := make([]byte, len(payload.BaseFeePerGas))
+		for i := 0; i < 32; i++ {
+			baseFeePerGasBEBytes[i] = payload.BaseFeePerGas[32-1-i]
+		}
+		baseFeePerGas := new(big.Int).SetBytes(baseFeePerGasBEBytes)
+		res.WriteString("  Base fee per gas: ")
+		res.WriteString(string2eth.WeiToString(baseFeePerGas, 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(fmt.Sprintf("%#x\n", payload.FeeRecipient))
+		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: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.ExtraData))
+		res.WriteString("  Logs bloom: ")
+		res.WriteString(fmt.Sprintf("%#x\n", payload.LogsBloom))
+	}
+
+	return res.String(), nil
+}
+
 // intersection returns a list of items common between the two sets.
-func intersection(set1 []uint64, set2 []uint64) []spec.ValidatorIndex {
+func intersection(set1 []uint64, set2 []uint64) []phase0.ValidatorIndex {
 	sort.Slice(set1, func(i, j int) bool { return set1[i] < set1[j] })
 	sort.Slice(set2, func(i, j int) bool { return set2[i] < set2[j] })
-	res := make([]spec.ValidatorIndex, 0)
+	res := make([]phase0.ValidatorIndex, 0)
 
 	set1Pos := 0
 	set2Pos := 0
@@ -287,7 +584,7 @@ func intersection(set1 []uint64, set2 []uint64) []spec.ValidatorIndex {
 		case set2[set2Pos] < set1[set1Pos]:
 			set2Pos++
 		default:
-			res = append(res, spec.ValidatorIndex(set1[set1Pos]))
+			res = append(res, phase0.ValidatorIndex(set1[set1Pos]))
 			set1Pos++
 			set2Pos++
 		}
@@ -296,7 +593,7 @@ func intersection(set1 []uint64, set2 []uint64) []spec.ValidatorIndex {
 	return res
 }
 
-func bitsToString(input bitfield.Bitlist) string {
+func bitlistToString(input bitfield.Bitlist) string {
 	bits := int(input.Len())
 
 	res := ""
@@ -313,7 +610,24 @@ func bitsToString(input bitfield.Bitlist) string {
 	return strings.TrimSpace(res)
 }
 
-func attestingIndices(input bitfield.Bitlist, indices []spec.ValidatorIndex) string {
+func bitvectorToString(input bitfield.Bitvector512) string {
+	bits := int(input.Len())
+
+	res := strings.Builder{}
+	for i := 0; i < bits; i++ {
+		if input.BitAt(uint64(i)) {
+			res.WriteString("✓")
+		} else {
+			res.WriteString("✕")
+		}
+		if i%8 == 7 && i != bits-1 {
+			res.WriteString(" ")
+		}
+	}
+	return res.String()
+}
+
+func attestingIndices(input bitfield.Bitlist, indices []phase0.ValidatorIndex) string {
 	bits := int(input.Len())
 	res := ""
 	for i := 0; i < bits; i++ {

cmd/block/info/process.go

@@ -21,11 +21,15 @@ import (
 
 	eth2client "github.com/attestantio/go-eth2-client"
 	api "github.com/attestantio/go-eth2-client/api/v1"
-	spec "github.com/attestantio/go-eth2-client/spec/phase0"
+	"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/phase0"
 	"github.com/pkg/errors"
 )
 
 var jsonOutput bool
+var sszOutput bool
 var results *dataOut
 
 func process(ctx context.Context, data *dataIn) (*dataOut, error) {
@@ -55,13 +59,29 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain beacon block")
 	}
-
-	if err := outputBlock(ctx, data.jsonOutput, signedBlock); err != nil {
-		return nil, errors.Wrap(err, "failed to output block")
+	if signedBlock == nil {
+		return nil, errors.New("empty beacon block")
+	}
+	switch signedBlock.Version {
+	case spec.DataVersionPhase0:
+		if err := outputPhase0Block(ctx, data.jsonOutput, signedBlock.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 {
+			return nil, errors.Wrap(err, "failed to output block")
+		}
+	case spec.DataVersionBellatrix:
+		if err := outputBellatrixBlock(ctx, data.jsonOutput, data.sszOutput, signedBlock.Bellatrix); err != nil {
+			return nil, errors.Wrap(err, "failed to output block")
+		}
+	default:
+		return nil, errors.New("unknown block version")
 	}
 
 	if data.stream {
 		jsonOutput = data.jsonOutput
+		sszOutput = data.sszOutput
 		err := data.eth2Client.(eth2client.EventsProvider).Events(ctx, []string{"head"}, headEventHandler)
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to start block stream")
@@ -81,14 +101,48 @@ func headEventHandler(event *api.Event) {
 	blockID := fmt.Sprintf("%#x", event.Data.(*api.HeadEvent).Block[:])
 	signedBlock, err := results.eth2Client.(eth2client.SignedBeaconBlockProvider).SignedBeaconBlock(context.Background(), blockID)
 	if err != nil {
-		fmt.Printf("Failed to obtain block: %v\n", err)
+		if !jsonOutput {
+			fmt.Printf("Failed to obtain block: %v\n", err)
+		}
+		return
 	}
-	if err := outputBlock(context.Background(), jsonOutput, signedBlock); err != nil {
-		fmt.Printf("Failed to display block: %v\n", err)
+	if signedBlock == nil {
+		if !jsonOutput {
+			fmt.Println("Empty beacon block")
+		}
+		return
+	}
+	switch signedBlock.Version {
+	case spec.DataVersionPhase0:
+		if err := outputPhase0Block(context.Background(), jsonOutput, signedBlock.Phase0); err != nil {
+			if !jsonOutput {
+				fmt.Printf("Failed to output block: %v\n", err)
+			}
+			return
+		}
+	case spec.DataVersionAltair:
+		if err := outputAltairBlock(context.Background(), jsonOutput, sszOutput, signedBlock.Altair); err != nil {
+			if !jsonOutput {
+				fmt.Printf("Failed to output block: %v\n", err)
+			}
+			return
+		}
+	case spec.DataVersionBellatrix:
+		if err := outputBellatrixBlock(context.Background(), jsonOutput, sszOutput, signedBlock.Bellatrix); err != nil {
+			if !jsonOutput {
+				fmt.Printf("Failed to output block: %v\n", err)
+			}
+			return
+		}
+	default:
+		if !jsonOutput {
+			fmt.Printf("Unknown block version: %v\n", signedBlock.Version)
+		}
+		return
 	}
 }
 
-func outputBlock(ctx context.Context, jsonOutput bool, signedBlock *spec.SignedBeaconBlock) error {
+func outputPhase0Block(ctx context.Context, jsonOutput bool, signedBlock *phase0.SignedBeaconBlock) error {
 	switch {
 	case jsonOutput:
 		data, err := json.Marshal(signedBlock)
@@ -97,7 +151,55 @@ func outputBlock(ctx context.Context, jsonOutput bool, signedBlock *spec.SignedB
 		}
 		fmt.Printf("%s\n", string(data))
 	default:
-		data, err := outputBlockText(ctx, results, signedBlock)
+		data, err := outputPhase0BlockText(ctx, results, signedBlock)
+		if err != nil {
+			return errors.Wrap(err, "failed to generate text")
+		}
+		fmt.Printf("%s\n", data)
+	}
+	return nil
+}
+
+func outputAltairBlock(ctx context.Context, jsonOutput bool, sszOutput bool, signedBlock *altair.SignedBeaconBlock) 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 := outputAltairBlockText(ctx, results, signedBlock)
+		if err != nil {
+			return errors.Wrap(err, "failed to generate text")
+		}
+		fmt.Printf("%s\n", data)
+	}
+	return nil
+}
+
+func outputBellatrixBlock(ctx context.Context, jsonOutput bool, sszOutput bool, signedBlock *bellatrix.SignedBeaconBlock) 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 := outputBellatrixBlockText(ctx, results, signedBlock)
 		if err != nil {
 			return errors.Wrap(err, "failed to generate text")
 		}

cmd/block/info/process_internal_test.go

@@ -47,7 +47,7 @@ func TestProcess(t *testing.T) {
 			dataIn: &dataIn{
 				eth2Client: eth2Client,
 			},
-			err: "failed to output block: failed to generate text: no block supplied",
+			err: "empty beacon block",
 		},
 	}
 

cmd/blockanalyze.go

@@ -0,0 +1,65 @@
+// Copyright © 2022 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"
+	blockanalyze "github.com/wealdtech/ethdo/cmd/block/analyze"
+)
+
+var blockAnalyzeCmd = &cobra.Command{
+	Use:   "analyze",
+	Short: "Analyze a block",
+	Long: `Analyze the contents of a block.  For example:
+
+    ethdo block analyze --blockid=12345
+
+In quiet mode this will return 0 if the block information is present and not skipped, otherwise 1.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := blockanalyze.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if viper.GetBool("quiet") {
+			return nil
+		}
+		if res != "" {
+			fmt.Print(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	blockCmd.AddCommand(blockAnalyzeCmd)
+	blockFlags(blockAnalyzeCmd)
+	blockAnalyzeCmd.Flags().String("blockid", "head", "the ID of the block to fetch")
+	blockAnalyzeCmd.Flags().Bool("stream", false, "continually stream blocks as they arrive")
+	blockAnalyzeCmd.Flags().Bool("json", false, "output data in JSON format")
+}
+
+func blockAnalyzeBindings() {
+	if err := viper.BindPFlag("blockid", blockAnalyzeCmd.Flags().Lookup("blockid")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("stream", blockAnalyzeCmd.Flags().Lookup("stream")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("json", blockAnalyzeCmd.Flags().Lookup("json")); err != nil {
+		panic(err)
+	}
+}

cmd/blockinfo.go

@@ -26,7 +26,7 @@ var blockInfoCmd = &cobra.Command{
 	Short: "Obtain information about a block",
 	Long: `Obtain information about a block.  For example:
 
-    ethdo block info --slot=12345
+    ethdo block info --blockid=12345
 
 In quiet mode this will return 0 if the block information is present and not skipped, otherwise 1.`,
 	RunE: func(cmd *cobra.Command, args []string) error {
@@ -50,6 +50,7 @@ func init() {
 	blockInfoCmd.Flags().String("blockid", "head", "the ID of the block to fetch")
 	blockInfoCmd.Flags().Bool("stream", false, "continually stream blocks as they arrive")
 	blockInfoCmd.Flags().Bool("json", false, "output data in JSON format")
+	blockInfoCmd.Flags().Bool("ssz", false, "output data in SSZ format")
 }
 
 func blockInfoBindings() {
@@ -62,4 +63,7 @@ func blockInfoBindings() {
 	if err := viper.BindPFlag("json", blockInfoCmd.Flags().Lookup("json")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("ssz", blockInfoCmd.Flags().Lookup("ssz")); err != nil {
+		panic(err)
+	}
 }

cmd/chain/time/input.go

@@ -0,0 +1,81 @@
+// Copyright © 2021 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 chaintime
+
+import (
+	"context"
+	"time"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+)
+
+type dataIn struct {
+	// System.
+	timeout time.Duration
+	quiet   bool
+	verbose bool
+	debug   bool
+	json    bool
+	// Input
+	connection               string
+	allowInsecureConnections bool
+	timestamp                string
+	slot                     string
+	epoch                    string
+}
+
+func input(ctx context.Context) (*dataIn, error) {
+	data := &dataIn{}
+
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	data.timeout = viper.GetDuration("timeout")
+	data.quiet = viper.GetBool("quiet")
+	data.verbose = viper.GetBool("verbose")
+	data.debug = viper.GetBool("debug")
+	data.json = viper.GetBool("json")
+
+	haveInput := false
+	if viper.GetString("timestamp") != "" {
+		data.timestamp = viper.GetString("timestamp")
+		haveInput = true
+	}
+	if viper.GetString("slot") != "" {
+		if haveInput {
+			return nil, errors.New("only one of timestamp, slot and epoch allowed")
+		}
+		data.slot = viper.GetString("slot")
+		haveInput = true
+	}
+	if viper.GetString("epoch") != "" {
+		if haveInput {
+			return nil, errors.New("only one of timestamp, slot and epoch allowed")
+		}
+		data.epoch = viper.GetString("epoch")
+		haveInput = true
+	}
+	if !haveInput {
+		return nil, errors.New("one of timestamp, slot or epoch required")
+	}
+
+	if viper.GetString("connection") == "" {
+		return nil, errors.New("connection is required")
+	}
+	data.connection = viper.GetString("connection")
+	data.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+
+	return data, nil
+}

cmd/chain/time/input_internal_test.go

@@ -0,0 +1,97 @@
+// Copyright © 2021 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 chaintime
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+	"github.com/wealdtech/ethdo/testutil"
+	e2types "github.com/wealdtech/go-eth2-types/v2"
+	e2wallet "github.com/wealdtech/go-eth2-wallet"
+	keystorev4 "github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4"
+	nd "github.com/wealdtech/go-eth2-wallet-nd/v2"
+	scratch "github.com/wealdtech/go-eth2-wallet-store-scratch"
+	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
+)
+
+func TestInput(t *testing.T) {
+	if os.Getenv("ETHDO_TEST_CONNECTION") == "" {
+		t.Skip("ETHDO_TEST_CONNECTION not configured; cannot run tests")
+	}
+
+	require.NoError(t, e2types.InitBLS())
+
+	store := scratch.New()
+	require.NoError(t, e2wallet.UseStore(store))
+	testWallet, err := nd.CreateWallet(context.Background(), "Test wallet", store, keystorev4.New())
+	require.NoError(t, err)
+	require.NoError(t, testWallet.(e2wtypes.WalletLocker).Unlock(context.Background(), nil))
+	viper.Set("passphrase", "pass")
+	_, err = testWallet.(e2wtypes.WalletAccountImporter).ImportAccount(context.Background(),
+		"Interop 0",
+		testutil.HexToBytes("0x25295f0d1d592a90b333e26e85149708208e9f8e8bc18f6c77bd62f8ad7a6866"),
+		[]byte("pass"),
+	)
+	require.NoError(t, err)
+
+	tests := []struct {
+		name string
+		vars map[string]interface{}
+		res  *dataIn
+		err  string
+	}{
+		{
+			name: "TimeoutMissing",
+			vars: map[string]interface{}{},
+			err:  "timeout is required",
+		},
+		{
+			name: "ConnectionMissing",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+				"slot":    "1",
+			},
+			err: "connection is required",
+		},
+		{
+			name: "IDMissing",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+			err: "one of timestamp, slot or epoch required",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			res, err := input(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, test.res.timeout, res.timeout)
+			}
+		})
+	}
+}

cmd/chain/time/output.go

@@ -0,0 +1,82 @@
+// Copyright © 2021 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 chaintime
+
+import (
+	"context"
+	"fmt"
+	"strings"
+	"time"
+
+	spec "github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+)
+
+type dataOut struct {
+	debug   bool
+	quiet   bool
+	verbose bool
+
+	epoch                         spec.Epoch
+	epochStart                    time.Time
+	epochEnd                      time.Time
+	slot                          spec.Slot
+	slotStart                     time.Time
+	slotEnd                       time.Time
+	syncCommitteePeriod           uint64
+	syncCommitteePeriodStart      time.Time
+	syncCommitteePeriodEpochStart spec.Epoch
+	syncCommitteePeriodEnd        time.Time
+	syncCommitteePeriodEpochEnd   spec.Epoch
+}
+
+func output(ctx context.Context, data *dataOut) (string, error) {
+	if data == nil {
+		return "", errors.New("no data")
+	}
+
+	if data.quiet {
+		return "", nil
+	}
+
+	builder := strings.Builder{}
+
+	builder.WriteString("Epoch ")
+	builder.WriteString(fmt.Sprintf("%d", data.epoch))
+	builder.WriteString("\n  Epoch start ")
+	builder.WriteString(data.epochStart.Format("2006-01-02 15:04:05"))
+	builder.WriteString("\n  Epoch end ")
+	builder.WriteString(data.epochEnd.Format("2006-01-02 15:04:05"))
+
+	builder.WriteString("\nSlot ")
+	builder.WriteString(fmt.Sprintf("%d", data.slot))
+	builder.WriteString("\n  Slot start ")
+	builder.WriteString(data.slotStart.Format("2006-01-02 15:04:05"))
+	builder.WriteString("\n  Slot end ")
+	builder.WriteString(data.slotEnd.Format("2006-01-02 15:04:05"))
+
+	builder.WriteString("\nSync committee period ")
+	builder.WriteString(fmt.Sprintf("%d", data.syncCommitteePeriod))
+	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))
+	builder.WriteString(")\n  Sync committee period end ")
+	builder.WriteString(data.syncCommitteePeriodEnd.Format("2006-01-02 15:04:05"))
+	builder.WriteString(" (epoch ")
+	builder.WriteString(fmt.Sprintf("%d", data.syncCommitteePeriodEpochEnd))
+	builder.WriteString(")\n")
+
+	return builder.String(), nil
+}

cmd/chain/time/output_internal_test.go

@@ -0,0 +1,85 @@
+// Copyright © 2021 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 chaintime
+
+// import (
+// 	"context"
+// 	"testing"
+//
+// 	api "github.com/attestantio/go-eth2-client/api/v1"
+// 	"github.com/stretchr/testify/require"
+// 	"github.com/wealdtech/ethdo/testutil"
+// )
+//
+// func TestOutput(t *testing.T) {
+// 	tests := []struct {
+// 		name    string
+// 		dataOut *dataOut
+// 		res     string
+// 		err     string
+// 	}{
+// 		{
+// 			name: "Nil",
+// 			err:  "no data",
+// 		},
+// 		{
+// 			name:    "Empty",
+// 			dataOut: &dataOut{},
+// 			res:     "No duties found",
+// 		},
+// 		{
+// 			name: "Present",
+// 			dataOut: &dataOut{
+// 				duty: &api.AttesterDuty{
+// 					PubKey:                  testutil.HexToPubKey("0x933ad9491b62059dd065b560d256d8957a8c402cc6e8d8ee7290ae11e8f7329267a8811c397529dac52ae1342ba58c95"),
+// 					Slot:                    1,
+// 					ValidatorIndex:          2,
+// 					CommitteeIndex:          3,
+// 					CommitteeLength:         4,
+// 					CommitteesAtSlot:        5,
+// 					ValidatorCommitteeIndex: 6,
+// 				},
+// 			},
+// 			res: "Validator attesting in slot 1 committee 3",
+// 		},
+// 		{
+// 			name: "JSON",
+// 			dataOut: &dataOut{
+// 				json: true,
+// 				duty: &api.AttesterDuty{
+// 					PubKey:                  testutil.HexToPubKey("0x933ad9491b62059dd065b560d256d8957a8c402cc6e8d8ee7290ae11e8f7329267a8811c397529dac52ae1342ba58c95"),
+// 					Slot:                    1,
+// 					ValidatorIndex:          2,
+// 					CommitteeIndex:          3,
+// 					CommitteeLength:         4,
+// 					CommitteesAtSlot:        5,
+// 					ValidatorCommitteeIndex: 6,
+// 				},
+// 			},
+// 			res: `{"pubkey":"0x933ad9491b62059dd065b560d256d8957a8c402cc6e8d8ee7290ae11e8f7329267a8811c397529dac52ae1342ba58c95","slot":"1","validator_index":"2","committee_index":"3","committee_length":"4","committees_at_slot":"5","validator_committee_index":"6"}`,
+// 		},
+// 	}
+//
+// 	for _, test := range tests {
+// 		t.Run(test.name, func(t *testing.T) {
+// 			res, err := output(context.Background(), test.dataOut)
+// 			if test.err != "" {
+// 				require.EqualError(t, err, test.err)
+// 			} else {
+// 				require.NoError(t, err)
+// 				require.Equal(t, test.res, res)
+// 			}
+// 		})
+// 	}
+// }

cmd/chain/time/process.go

@@ -0,0 +1,95 @@
+// Copyright © 2021 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 chaintime
+
+import (
+	"context"
+	"strconv"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+	"github.com/wealdtech/ethdo/util"
+)
+
+func process(ctx context.Context, data *dataIn) (*dataOut, error) {
+	if data == nil {
+		return nil, errors.New("no data")
+	}
+
+	eth2Client, err := util.ConnectToBeaconNode(ctx, data.connection, data.timeout, data.allowInsecureConnections)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to connect to Ethereum 2 beacon node")
+	}
+
+	config, err := eth2Client.(eth2client.SpecProvider).Spec(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to obtain beacon chain configuration")
+	}
+
+	slotsPerEpoch := config["SLOTS_PER_EPOCH"].(uint64)
+	slotDuration := config["SECONDS_PER_SLOT"].(time.Duration)
+	epochsPerSyncCommitteePeriod := config["EPOCHS_PER_SYNC_COMMITTEE_PERIOD"].(uint64)
+	genesis, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to obtain genesis data")
+	}
+
+	results := &dataOut{
+		debug:   data.debug,
+		quiet:   data.quiet,
+		verbose: data.verbose,
+	}
+
+	// Calculate the slot given the input.
+	switch {
+	case data.slot != "":
+		slot, err := strconv.ParseUint(data.slot, 10, 64)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to parse slot")
+		}
+		results.slot = phase0.Slot(slot)
+	case data.epoch != "":
+		epoch, err := strconv.ParseUint(data.epoch, 10, 64)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to parse epoch")
+		}
+		results.slot = phase0.Slot(epoch * slotsPerEpoch)
+	case data.timestamp != "":
+		timestamp, err := time.Parse("2006-01-02T15:04:05-0700", data.timestamp)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to parse timestamp")
+		}
+		secs := timestamp.Sub(genesis.GenesisTime)
+		if secs < 0 {
+			return nil, errors.New("timestamp prior to genesis")
+		}
+		results.slot = phase0.Slot(secs / slotDuration)
+	}
+
+	// Fill in the info given the slot.
+	results.slotStart = genesis.GenesisTime.Add(time.Duration(results.slot) * slotDuration)
+	results.slotEnd = genesis.GenesisTime.Add(time.Duration(results.slot+1) * slotDuration)
+	results.epoch = phase0.Epoch(uint64(results.slot) / slotsPerEpoch)
+	results.epochStart = genesis.GenesisTime.Add(time.Duration(uint64(results.epoch)*slotsPerEpoch) * slotDuration)
+	results.epochEnd = genesis.GenesisTime.Add(time.Duration(uint64(results.epoch+1)*slotsPerEpoch) * slotDuration)
+	results.syncCommitteePeriod = uint64(results.epoch) / epochsPerSyncCommitteePeriod
+	results.syncCommitteePeriodEpochStart = phase0.Epoch(results.syncCommitteePeriod * epochsPerSyncCommitteePeriod)
+	results.syncCommitteePeriodEpochEnd = phase0.Epoch((results.syncCommitteePeriod+1)*epochsPerSyncCommitteePeriod) - 1
+	results.syncCommitteePeriodStart = genesis.GenesisTime.Add(time.Duration(uint64(results.syncCommitteePeriodEpochStart)*slotsPerEpoch) * slotDuration)
+	results.syncCommitteePeriodEnd = genesis.GenesisTime.Add(time.Duration(uint64(results.syncCommitteePeriodEpochEnd)*slotsPerEpoch) * slotDuration)
+
+	return results, nil
+}

cmd/chain/time/process_internal_test.go

@@ -0,0 +1,120 @@
+// Copyright © 2021 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 chaintime
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"testing"
+	"time"
+
+	"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
+		dataIn   *dataIn
+		expected *dataOut
+		err      string
+	}{
+		{
+			name: "Nil",
+			err:  "no data",
+		},
+		{
+			name: "Slot",
+			dataIn: &dataIn{
+				connection:               os.Getenv("ETHDO_TEST_CONNECTION"),
+				timeout:                  10 * time.Second,
+				allowInsecureConnections: true,
+				slot:                     "1",
+			},
+			expected: &dataOut{
+				epochStart:                    time.Unix(1606824023, 0),
+				epochEnd:                      time.Unix(1606824407, 0),
+				slot:                          1,
+				slotStart:                     time.Unix(1606824035, 0),
+				slotEnd:                       time.Unix(1606824047, 0),
+				syncCommitteePeriod:           0,
+				syncCommitteePeriodStart:      time.Unix(1606824023, 0),
+				syncCommitteePeriodEnd:        time.Unix(1606921943, 0),
+				syncCommitteePeriodEpochStart: 0,
+				syncCommitteePeriodEpochEnd:   255,
+			},
+		},
+		{
+			name: "Epoch",
+			dataIn: &dataIn{
+				connection:               os.Getenv("ETHDO_TEST_CONNECTION"),
+				timeout:                  10 * time.Second,
+				allowInsecureConnections: true,
+				epoch:                    "2",
+			},
+			expected: &dataOut{
+				epoch:                         2,
+				epochStart:                    time.Unix(1606824791, 0),
+				epochEnd:                      time.Unix(1606825175, 0),
+				slot:                          64,
+				slotStart:                     time.Unix(1606824791, 0),
+				slotEnd:                       time.Unix(1606824803, 0),
+				syncCommitteePeriod:           0,
+				syncCommitteePeriodStart:      time.Unix(1606824023, 0),
+				syncCommitteePeriodEnd:        time.Unix(1606921943, 0),
+				syncCommitteePeriodEpochStart: 0,
+				syncCommitteePeriodEpochEnd:   255,
+			},
+		},
+		{
+			name: "Timestamp",
+			dataIn: &dataIn{
+				connection:               os.Getenv("ETHDO_TEST_CONNECTION"),
+				timeout:                  10 * time.Second,
+				allowInsecureConnections: true,
+				timestamp:                "2021-01-01T00:00:00+0000",
+			},
+			expected: &dataOut{
+				epoch:                         6862,
+				epochStart:                    time.Unix(1609459031, 0),
+				epochEnd:                      time.Unix(1609459415, 0),
+				slot:                          219598,
+				slotStart:                     time.Unix(1609459199, 0),
+				slotEnd:                       time.Unix(1609459211, 0),
+				syncCommitteePeriod:           26,
+				syncCommitteePeriodStart:      time.Unix(1609379927, 0),
+				syncCommitteePeriodEnd:        time.Unix(1609477847, 0),
+				syncCommitteePeriodEpochStart: 6656,
+				syncCommitteePeriodEpochEnd:   6911,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			res, err := process(context.Background(), test.dataIn)
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+				fmt.Printf("****** %d %d\n", res.syncCommitteePeriodStart.Unix(), res.syncCommitteePeriodEnd.Unix())
+				require.Equal(t, test.expected, res)
+			}
+		})
+	}
+}

cmd/chain/time/run.go

@@ -0,0 +1,50 @@
+// Copyright © 2021 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 chaintime
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// Run runs the wallet create data command.
+func Run(cmd *cobra.Command) (string, error) {
+	ctx := context.Background()
+	dataIn, err := input(ctx)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to obtain input")
+	}
+
+	// Further errors do not need a usage report.
+	cmd.SilenceUsage = true
+
+	dataOut, err := process(ctx, dataIn)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to process")
+	}
+
+	if viper.GetBool("quiet") {
+		return "", nil
+	}
+
+	results, err := output(ctx, dataOut)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to obtain output")
+	}
+
+	return results, nil
+}

cmd/chain/verify/signedcontributionandproof/command.go

@@ -0,0 +1,86 @@
+// Copyright © 2021 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 chainverifysignedcontributionandproof
+
+import (
+	"context"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	api "github.com/attestantio/go-eth2-client/api/v1"
+	"github.com/attestantio/go-eth2-client/spec/altair"
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+)
+
+type command struct {
+	quiet   bool
+	verbose bool
+	debug   bool
+
+	// Beacon node connection.
+	timeout                  time.Duration
+	connection               string
+	allowInsecureConnections bool
+
+	// Input.
+	data string
+	item *altair.SignedContributionAndProof
+
+	// Data access.
+	eth2Client         eth2client.Service
+	validatorsProvider eth2client.ValidatorsProvider
+
+	// Data.
+	spec          map[string]interface{}
+	validator     *api.Validator
+	syncCommittee *api.SyncCommittee
+
+	// Output.
+	itemStructureValid                       bool
+	validatorKnown                           bool
+	validatorInSyncCommittee                 bool
+	validatorIsAggregator                    bool
+	contributionSignatureValidFormat         bool
+	contributionAndProofSignatureValidFormat bool
+	contributionAndProofSignatureValid       bool
+	additionalInfo                           string
+}
+
+func newCommand(ctx context.Context) (*command, error) {
+	c := &command{
+		quiet:   viper.GetBool("quiet"),
+		verbose: viper.GetBool("verbose"),
+		debug:   viper.GetBool("debug"),
+	}
+
+	// Timeout.
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	c.timeout = viper.GetDuration("timeout")
+
+	if viper.GetString("data") == "" {
+		return nil, errors.New("data is required")
+	}
+	c.data = viper.GetString("data")
+
+	if viper.GetString("connection") == "" {
+		return nil, errors.New("connection is required")
+	}
+	c.connection = viper.GetString("connection")
+	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+
+	return c, nil
+}

cmd/chain/verify/signedcontributionandproof/command_internal_test.go

@@ -0,0 +1,80 @@
+// Copyright © 2021 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 chainverifysignedcontributionandproof
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInput(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: "TimeoutMissing",
+			vars: map[string]interface{}{},
+			err:  "timeout is required",
+		},
+		{
+			name: "DataMissing",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+			},
+			err: "data is required",
+		},
+		{
+			name: "ConnectionMissing",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+				"data":    "{}",
+			},
+			err: "connection is required",
+		},
+		{
+			name: "Good",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"data":       "{}",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			_, err := newCommand(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

cmd/chain/verify/signedcontributionandproof/output.go

@@ -0,0 +1,127 @@
+// Copyright © 2021 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 chainverifysignedcontributionandproof
+
+import (
+	"context"
+	"strings"
+)
+
+func (c *command) output(ctx context.Context) (string, error) {
+	if c.quiet {
+		return "", nil
+	}
+
+	builder := strings.Builder{}
+
+	builder.WriteString("Valid data structure: ")
+	if c.itemStructureValid {
+		builder.WriteString("✓\n")
+	} else {
+		builder.WriteString("✕")
+		if c.additionalInfo != "" {
+			builder.WriteString(" (")
+			builder.WriteString(c.additionalInfo)
+			builder.WriteString(")")
+		}
+		builder.WriteString("\n")
+		return builder.String(), nil
+	}
+
+	builder.WriteString("Validator known: ")
+	if c.validatorKnown {
+		builder.WriteString("✓\n")
+	} else {
+		builder.WriteString("✕")
+		if c.additionalInfo != "" {
+			builder.WriteString(" (")
+			builder.WriteString(c.additionalInfo)
+			builder.WriteString(")")
+		}
+		builder.WriteString("\n")
+		return builder.String(), nil
+	}
+
+	builder.WriteString("Validator in sync committee: ")
+	if c.validatorInSyncCommittee {
+		builder.WriteString("✓\n")
+	} else {
+		builder.WriteString("✕")
+		if c.additionalInfo != "" {
+			builder.WriteString(" (")
+			builder.WriteString(c.additionalInfo)
+			builder.WriteString(")")
+		}
+		builder.WriteString("\n")
+		return builder.String(), nil
+	}
+
+	builder.WriteString("Validator is aggregator: ")
+	if c.validatorIsAggregator {
+		builder.WriteString("✓\n")
+	} else {
+		builder.WriteString("✕")
+		if c.additionalInfo != "" {
+			builder.WriteString(" (")
+			builder.WriteString(c.additionalInfo)
+			builder.WriteString(")")
+		}
+		builder.WriteString("\n")
+		return builder.String(), nil
+	}
+
+	builder.WriteString("Contribution signature has valid format: ")
+	if c.contributionSignatureValidFormat {
+		builder.WriteString("✓\n")
+	} else {
+		builder.WriteString("✕")
+		if c.additionalInfo != "" {
+			builder.WriteString(" (")
+			builder.WriteString(c.additionalInfo)
+			builder.WriteString(")")
+		}
+		builder.WriteString("\n")
+		return builder.String(), nil
+	}
+
+	builder.WriteString("Contribution and proof signature has valid format: ")
+	if c.contributionAndProofSignatureValidFormat {
+		builder.WriteString("✓\n")
+	} else {
+		builder.WriteString("✕")
+		if c.additionalInfo != "" {
+			builder.WriteString(" (")
+			builder.WriteString(c.additionalInfo)
+			builder.WriteString(")")
+		}
+		builder.WriteString("\n")
+		return builder.String(), nil
+	}
+
+	builder.WriteString("Contribution and proof signature is valid: ")
+	if c.contributionAndProofSignatureValid {
+		builder.WriteString("✓\n")
+	} else {
+		builder.WriteString("✕")
+		if c.additionalInfo != "" {
+			builder.WriteString(" (")
+			builder.WriteString(c.additionalInfo)
+			builder.WriteString(")")
+		}
+		builder.WriteString("\n")
+		return builder.String(), nil
+	}
+
+	return builder.String(), nil
+}

cmd/chain/verify/signedcontributionandproof/process.go

@@ -0,0 +1,303 @@
+// Copyright © 2021 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 chainverifysignedcontributionandproof
+
+import (
+	"context"
+	"crypto/sha256"
+	"encoding/binary"
+	"encoding/json"
+	"fmt"
+	"os"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/spec/altair"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+	"github.com/wealdtech/ethdo/util"
+	e2types "github.com/wealdtech/go-eth2-types/v2"
+)
+
+func (c *command) process(ctx context.Context) error {
+	// Parse the data.
+	if c.data == "" {
+		return errors.New("no data supplied")
+	}
+	c.item = &altair.SignedContributionAndProof{}
+	err := json.Unmarshal([]byte(c.data), c.item)
+	if err != nil {
+		c.additionalInfo = err.Error()
+		return nil
+	}
+	c.itemStructureValid = true
+
+	// Obtain information we need to process.
+	if err := c.setup(ctx); err != nil {
+		return err
+	}
+
+	for _, validatorIndex := range c.syncCommittee.Validators {
+		if validatorIndex == c.item.Message.AggregatorIndex {
+			c.validatorInSyncCommittee = true
+			break
+		}
+	}
+	if !c.validatorInSyncCommittee {
+		return nil
+	}
+
+	// Ensure the validator is an aggregator.
+	isAggregator, err := c.isAggregator(ctx)
+	if err != nil {
+		return errors.Wrap(err, "failed to ascertain if sync committee member is aggregator")
+	}
+	if !isAggregator {
+		return nil
+	}
+	c.validatorIsAggregator = true
+
+	// Confirm the contribution signature.
+	if err := c.confirmContributionSignature(ctx); err != nil {
+		return errors.Wrap(err, "failed to confirm the contribution signature")
+	}
+
+	// Confirm the contribution and proof signature.
+	if err := c.confirmContributionAndProofSignature(ctx); err != nil {
+		return errors.Wrap(err, "failed to confirm the contribution and proof signature")
+	}
+
+	return nil
+}
+
+func (c *command) setup(ctx context.Context) error {
+	var err error
+
+	// Connect to the client.
+	c.eth2Client, err = util.ConnectToBeaconNode(ctx, c.connection, c.timeout, c.allowInsecureConnections)
+	if err != nil {
+		return errors.Wrap(err, "failed to connect to beacon node")
+	}
+
+	// Obtain the validator.
+	var isProvider bool
+	c.validatorsProvider, isProvider = c.eth2Client.(eth2client.ValidatorsProvider)
+	if !isProvider {
+		return errors.New("connection does not provide validator information")
+	}
+
+	stateID := fmt.Sprintf("%d", c.item.Message.Contribution.Slot)
+	validators, err := c.validatorsProvider.Validators(ctx,
+		stateID,
+		[]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 {
+		return nil
+	}
+	c.validatorKnown = true
+	c.validator = validators[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)
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain sync committee information")
+	}
+
+	return nil
+}
+
+// isAggregator returns true if the given
+func (c *command) isAggregator(ctx context.Context) (bool, error) {
+	// Calculate the modulo.
+	specProvider, isProvider := c.eth2Client.(eth2client.SpecProvider)
+	if !isProvider {
+		return false, errors.New("connection does not provide spec information")
+	}
+	var err error
+	c.spec, err = specProvider.Spec(ctx)
+	if err != nil {
+		return false, errors.Wrap(err, "failed to obtain spec information")
+	}
+
+	tmp, exists := c.spec["SYNC_COMMITTEE_SIZE"]
+	if !exists {
+		return false, errors.New("spec does not contain SYNC_COMMITTEE_SIZE")
+	}
+	if _, isUint64 := tmp.(uint64); !isUint64 {
+		return false, errors.New("spec returned non-integer value for SYNC_COMMITTEE_SIZE")
+	}
+	syncCommitteeSize := tmp.(uint64)
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "sync committee size is %d\n", syncCommitteeSize)
+	}
+
+	tmp, exists = c.spec["SYNC_COMMITTEE_SUBNET_COUNT"]
+	if !exists {
+		return false, errors.New("spec does not contain SYNC_COMMITTEE_SUBNET_COUNT")
+	}
+	if _, isUint64 := tmp.(uint64); !isUint64 {
+		return false, errors.New("spec returned non-integer value for SYNC_COMMITTEE_SUBNET_COUNT")
+	}
+	syncCommitteeSubnetCount := tmp.(uint64)
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "sync committee subnet count is %d\n", syncCommitteeSubnetCount)
+	}
+
+	tmp, exists = c.spec["TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE"]
+	if !exists {
+		return false, errors.New("spec does not contain TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE")
+	}
+	if _, isUint64 := tmp.(uint64); !isUint64 {
+		return false, errors.New("spec returned non-integer value for TARGET_AGGREGATORS_PER_SYNC_SUBCOMMITTEE")
+	}
+	targetAggregatorsPerSyncSubcommittee := tmp.(uint64)
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "target aggregators per sync subcommittee is %d\n", targetAggregatorsPerSyncSubcommittee)
+	}
+
+	modulo := syncCommitteeSize / syncCommitteeSubnetCount / targetAggregatorsPerSyncSubcommittee
+	if modulo < 1 {
+		modulo = 1
+	}
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "modulo is %d\n", modulo)
+	}
+
+	// Hash the selection proof.
+	sigHash := sha256.New()
+	n, err := sigHash.Write(c.item.Message.SelectionProof[:])
+	if err != nil {
+		return false, errors.Wrap(err, "failed to hash the selection proof")
+	}
+	if n != len(c.item.Signature[:]) {
+		return false, errors.New("failed to write all bytes of the selection proof to the hash")
+	}
+	hash := sigHash.Sum(nil)
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "hash of selection proof is %#x\n", hash)
+	}
+
+	return binary.LittleEndian.Uint64(hash[:8])%modulo == 0, nil
+}
+
+func (c *command) confirmContributionSignature(ctx context.Context) error {
+	sigBytes := make([]byte, 96)
+	copy(sigBytes, c.item.Message.Contribution.Signature[:])
+	_, err := e2types.BLSSignatureFromBytes(sigBytes)
+	if err != nil {
+		c.additionalInfo = err.Error()
+		return nil
+	}
+	c.contributionSignatureValidFormat = true
+
+	subCommittee := c.syncCommittee.ValidatorAggregates[c.item.Message.Contribution.SubcommitteeIndex]
+	includedIndices := make([]phase0.ValidatorIndex, 0, len(subCommittee))
+	for i := uint64(0); i < c.item.Message.Contribution.AggregationBits.Len(); i++ {
+		if c.item.Message.Contribution.AggregationBits.BitAt(i) {
+			includedIndices = append(includedIndices, subCommittee[int(i)])
+		}
+	}
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "Contribution validator indices: %v (%d)\n", includedIndices, len(includedIndices))
+	}
+
+	includedValidators, err := c.validatorsProvider.Validators(ctx, "head", includedIndices)
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain subcommittee validators")
+	}
+	if len(includedValidators) == 0 {
+		return errors.New("obtained empty subcommittee validator list")
+	}
+
+	var aggregatePubKey *e2types.BLSPublicKey
+	for _, v := range includedValidators {
+		pubKeyBytes := make([]byte, 48)
+		copy(pubKeyBytes, v.Validator.PublicKey[:])
+		pubKey, err := e2types.BLSPublicKeyFromBytes(pubKeyBytes)
+		if err != nil {
+			return errors.Wrap(err, "failed to aggregate public key")
+		}
+		if aggregatePubKey == nil {
+			aggregatePubKey = pubKey
+		} else {
+			aggregatePubKey.Aggregate(pubKey)
+		}
+	}
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "Aggregate public key is %#x\n", aggregatePubKey.Marshal())
+	}
+
+	// Don't have the ability to carry out the batch verification at current.
+
+	return nil
+}
+
+func (c *command) confirmContributionAndProofSignature(ctx context.Context) error {
+	sigBytes := make([]byte, 96)
+	copy(sigBytes, c.item.Signature[:])
+	sig, err := e2types.BLSSignatureFromBytes(sigBytes)
+	if err != nil {
+		c.additionalInfo = err.Error()
+		return nil
+	}
+	c.contributionAndProofSignatureValidFormat = true
+
+	pubKeyBytes := make([]byte, 48)
+	copy(pubKeyBytes, c.validator.Validator.PublicKey[:])
+	pubKey, err := e2types.BLSPublicKeyFromBytes(pubKeyBytes)
+	if err != nil {
+		return errors.Wrap(err, "failed to configure public key")
+	}
+
+	objectRoot, err := c.item.Message.HashTreeRoot()
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain signging root")
+	}
+
+	tmp, exists := c.spec["DOMAIN_CONTRIBUTION_AND_PROOF"]
+	if !exists {
+		return errors.New("spec does not contain DOMAIN_CONTRIBUTION_AND_PROOF")
+	}
+	if _, isUint64 := tmp.(phase0.DomainType); !isUint64 {
+		return errors.New("spec returned non-domain type value for DOMAIN_CONTRIBUTION_AND_PROOF")
+	}
+	contributionAndProofDomainType := tmp.(phase0.DomainType)
+	if c.debug {
+		fmt.Fprintf(os.Stderr, "contribution and proof domain type is %#x\n", contributionAndProofDomainType)
+	}
+	domain, err := c.eth2Client.(eth2client.DomainProvider).Domain(ctx, contributionAndProofDomainType, phase0.Epoch(c.item.Message.Contribution.Slot/32))
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain domain")
+	}
+
+	container := &phase0.SigningData{
+		ObjectRoot: objectRoot,
+		Domain:     domain,
+	}
+	signingRoot, err := container.HashTreeRoot()
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain signging root")
+	}
+
+	c.contributionAndProofSignatureValid = sig.Verify(signingRoot[:], pubKey)
+
+	return nil
+}

cmd/chain/verify/signedcontributionandproof/process_internal_test.go

@@ -0,0 +1,62 @@
+// Copyright © 2021 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 chainverifysignedcontributionandproof
+
+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: "InvalidData",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"data":       "[[",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	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/chain/verify/signedcontributionandproof/run.go

@@ -0,0 +1,50 @@
+// Copyright © 2021 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 chainverifysignedcontributionandproof
+
+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/chaininfo.go

@@ -46,6 +46,9 @@ In quiet mode this will return 0 if the chain information can be obtained, other
 		genesis, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
 		errCheck(err, "Failed to obtain beacon chain genesis")
 
+		fork, err := eth2Client.(eth2client.ForkProvider).Fork(ctx, "head")
+		errCheck(err, "Failed to obtain current fork")
+
 		if quiet {
 			os.Exit(_exitSuccess)
 		}
@@ -57,7 +60,20 @@ In quiet mode this will return 0 if the chain information can be obtained, other
 			outputIf(verbose, fmt.Sprintf("Genesis timestamp: %v", genesis.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("Genesis fork version: %#x\n", config["GENESIS_FORK_VERSION"].(spec.Version))
+		fmt.Printf("Current fork version: %#x\n", fork.CurrentVersion)
+		if verbose {
+			forkData := &spec.ForkData{
+				CurrentVersion:        fork.CurrentVersion,
+				GenesisValidatorsRoot: genesis.GenesisValidatorsRoot,
+			}
+			forkDataRoot, err := forkData.HashTreeRoot()
+			if err == nil {
+				var forkDigest spec.ForkDigest
+				copy(forkDigest[:], forkDataRoot[:])
+				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))
 
@@ -69,18 +85,3 @@ func init() {
 	chainCmd.AddCommand(chainInfoCmd)
 	chainFlags(chainInfoCmd)
 }
-
-func timestampToSlot(genesis time.Time, timestamp time.Time, secondsPerSlot time.Duration) spec.Slot {
-	if timestamp.Unix() < genesis.Unix() {
-		return 0
-	}
-	return spec.Slot(uint64(timestamp.Unix()-genesis.Unix()) / uint64(secondsPerSlot.Seconds()))
-}
-
-func slotToTimestamp(genesis time.Time, slot spec.Slot, slotDuration time.Duration) int64 {
-	return genesis.Unix() + int64(slot)*int64(slotDuration.Seconds())
-}
-
-func epochToTimestamp(genesis time.Time, slot spec.Slot, slotDuration time.Duration, slotsPerEpoch uint64) int64 {
-	return genesis.Unix() + int64(slot)*int64(slotDuration.Seconds())*int64(slotsPerEpoch)
-}

cmd/chainstatus.go

@@ -1,4 +1,4 @@
-// Copyright © 2020 Weald Technology Trading
+// Copyright © 2020, 2021 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
@@ -17,12 +17,13 @@ import (
 	"context"
 	"fmt"
 	"os"
+	"strings"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
-	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
 	"github.com/wealdtech/ethdo/util"
 )
 
@@ -40,46 +41,116 @@ In quiet mode this will return 0 if the chain status can be obtained, otherwise
 		eth2Client, err := util.ConnectToBeaconNode(ctx, viper.GetString("connection"), viper.GetDuration("timeout"), viper.GetBool("allow-insecure-connections"))
 		errCheck(err, "Failed to connect to Ethereum 2 beacon node")
 
-		config, err := eth2Client.(eth2client.SpecProvider).Spec(ctx)
-		errCheck(err, "Failed to obtain beacon chain specification")
+		chainTime, err := standardchaintime.New(ctx,
+			standardchaintime.WithGenesisTimeProvider(eth2Client.(eth2client.GenesisTimeProvider)),
+			standardchaintime.WithForkScheduleProvider(eth2Client.(eth2client.ForkScheduleProvider)),
+			standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
+		)
+		errCheck(err, "Failed to configure chaintime service")
 
-		finality, err := eth2Client.(eth2client.FinalityProvider).Finality(ctx, "head")
+		finalityProvider, isProvider := eth2Client.(eth2client.FinalityProvider)
+		assert(isProvider, "beacon node does not provide finality; cannot report on chain status")
+		finality, err := finalityProvider.Finality(ctx, "head")
 		errCheck(err, "Failed to obtain finality information")
 
-		genesis, err := eth2Client.(eth2client.GenesisProvider).Genesis(ctx)
-		errCheck(err, "Failed to obtain genesis information")
+		slot := chainTime.CurrentSlot()
 
-		slotDuration := config["SECONDS_PER_SLOT"].(time.Duration)
-		curSlot := timestampToSlot(genesis.GenesisTime, time.Now(), slotDuration)
-		slotsPerEpoch := config["SLOTS_PER_EPOCH"].(uint64)
-		curEpoch := spec.Epoch(uint64(curSlot) / slotsPerEpoch)
-		fmt.Printf("Current epoch: %d\n", curEpoch)
-		fmt.Printf("Justified epoch: %d\n", finality.Justified.Epoch)
-		if verbose {
-			distance := curEpoch - finality.Justified.Epoch
-			fmt.Printf("Justified epoch distance: %d\n", distance)
-		}
-		fmt.Printf("Finalized epoch: %d\n", finality.Finalized.Epoch)
-		if verbose {
-			distance := curEpoch - finality.Finalized.Epoch
-			fmt.Printf("Finalized epoch distance: %d\n", distance)
-		}
-		if verbose {
-			fmt.Printf("Prior justified epoch: %d\n", finality.PreviousJustified.Epoch)
-			distance := curEpoch - finality.PreviousJustified.Epoch
-			fmt.Printf("Prior justified epoch distance: %d\n", distance)
-		}
+		nextSlot := slot + 1
+		nextSlotTimestamp := chainTime.StartOfSlot(nextSlot)
+
+		epoch := chainTime.CurrentEpoch()
+		epochStartSlot := chainTime.FirstSlotOfEpoch(epoch)
+		epochEndSlot := chainTime.FirstSlotOfEpoch(epoch+1) - 1
+
+		nextEpoch := epoch + 1
+		nextEpochStartSlot := chainTime.FirstSlotOfEpoch(nextEpoch)
+		nextEpochTimestamp := chainTime.StartOfEpoch(nextEpoch)
+
+		res := strings.Builder{}
+
+		res.WriteString("Current slot: ")
+		res.WriteString(fmt.Sprintf("%d", slot))
+		res.WriteString("\n")
+
+		res.WriteString("Current epoch: ")
+		res.WriteString(fmt.Sprintf("%d", epoch))
+		res.WriteString("\n")
 
 		if verbose {
-			epochStartSlot := (uint64(curSlot) / slotsPerEpoch) * slotsPerEpoch
-			fmt.Printf("Epoch slots: %d-%d\n", epochStartSlot, epochStartSlot+slotsPerEpoch-1)
-			nextSlotTimestamp := slotToTimestamp(genesis.GenesisTime, curSlot+1, slotDuration)
-			fmt.Printf("Time until next slot: %2.1fs\n", float64(time.Until(time.Unix(nextSlotTimestamp, 0)).Milliseconds())/1000)
-			nextEpoch := epochToTimestamp(genesis.GenesisTime, spec.Slot(uint64(curSlot)/slotsPerEpoch+1), slotDuration, slotsPerEpoch)
-			fmt.Printf("Slots until next epoch: %d\n", (uint64(curSlot)/slotsPerEpoch+1)*slotsPerEpoch-uint64(curSlot))
-			fmt.Printf("Time until next epoch: %2.1fs\n", float64(time.Until(time.Unix(nextEpoch, 0)).Milliseconds())/1000)
+			res.WriteString("Epoch slots: ")
+			res.WriteString(fmt.Sprintf("%d", epochStartSlot))
+			res.WriteString("-")
+			res.WriteString(fmt.Sprintf("%d", epochEndSlot))
+			res.WriteString("\n")
 		}
 
+		res.WriteString("Time until next slot: ")
+		res.WriteString(time.Until(nextSlotTimestamp).Round(time.Second).String())
+		res.WriteString("\n")
+
+		res.WriteString("Time until next epoch: ")
+		res.WriteString(time.Until(nextEpochTimestamp).Round(time.Second).String())
+		res.WriteString("\n")
+
+		res.WriteString("Slots until next epoch: ")
+		res.WriteString(fmt.Sprintf("%d", nextEpochStartSlot-slot))
+		res.WriteString("\n")
+
+		res.WriteString("Justified epoch: ")
+		res.WriteString(fmt.Sprintf("%d", finality.Justified.Epoch))
+		res.WriteString("\n")
+		if verbose {
+			distance := epoch - finality.Justified.Epoch
+			res.WriteString("Justified epoch distance: ")
+			res.WriteString(fmt.Sprintf("%d", distance))
+			res.WriteString("\n")
+		}
+
+		res.WriteString("Finalized epoch: ")
+		res.WriteString(fmt.Sprintf("%d", finality.Finalized.Epoch))
+		res.WriteString("\n")
+		if verbose {
+			distance := epoch - finality.Finalized.Epoch
+			res.WriteString("Finalized epoch distance: ")
+			res.WriteString(fmt.Sprintf("%d", distance))
+			res.WriteString("\n")
+		}
+
+		if epoch >= chainTime.AltairInitialEpoch() {
+			period := chainTime.SlotToSyncCommitteePeriod(slot)
+			periodStartEpoch := chainTime.FirstEpochOfSyncPeriod(period)
+			periodStartSlot := chainTime.FirstSlotOfEpoch(periodStartEpoch)
+			nextPeriod := period + 1
+			nextPeriodStartEpoch := chainTime.FirstEpochOfSyncPeriod(nextPeriod)
+			periodEndEpoch := nextPeriodStartEpoch - 1
+			periodEndSlot := chainTime.FirstSlotOfEpoch(periodEndEpoch+1) - 1
+			nextPeriodTimestamp := chainTime.StartOfEpoch(nextPeriodStartEpoch)
+
+			res.WriteString("Sync committee period: ")
+			res.WriteString(fmt.Sprintf("%d", period))
+			res.WriteString("\n")
+
+			if verbose {
+				res.WriteString("Sync committee epochs: ")
+				res.WriteString(fmt.Sprintf("%d", periodStartEpoch))
+				res.WriteString("-")
+				res.WriteString(fmt.Sprintf("%d", periodEndEpoch))
+				res.WriteString("\n")
+
+				res.WriteString("Sync committee slots: ")
+				res.WriteString(fmt.Sprintf("%d", periodStartSlot))
+				res.WriteString("-")
+				res.WriteString(fmt.Sprintf("%d", periodEndSlot))
+				res.WriteString("\n")
+
+				res.WriteString("Time until next sync committee period: ")
+				res.WriteString(time.Until(nextPeriodTimestamp).Round(time.Second).String())
+				res.WriteString("\n")
+			}
+		}
+
+		fmt.Print(res.String())
+
 		os.Exit(_exitSuccess)
 	},
 }

cmd/chaintime.go

@@ -0,0 +1,60 @@
+// Copyright © 2021 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"
+	chaintime "github.com/wealdtech/ethdo/cmd/chain/time"
+)
+
+var chainTimeCmd = &cobra.Command{
+	Use:   "time",
+	Short: "Obtain info about the chain at a given time",
+	Long: `Obtain info about the chain at a given time.  For example:
+
+    ethdo chain time --slot=12345`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := chaintime.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if res != "" {
+			fmt.Print(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	chainCmd.AddCommand(chainTimeCmd)
+	chainFlags(chainTimeCmd)
+	chainTimeCmd.Flags().String("slot", "", "The slot for which to obtain information")
+	chainTimeCmd.Flags().String("epoch", "", "The epoch for which to obtain information")
+	chainTimeCmd.Flags().String("timestamp", "", "The timestamp for which to obtain information (format YYYY-MM-DDTHH:MM:SS+ZZZZ)")
+}
+
+func chainTimeBindings() {
+	if err := viper.BindPFlag("slot", chainTimeCmd.Flags().Lookup("slot")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("epoch", chainTimeCmd.Flags().Lookup("epoch")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("timestamp", chainTimeCmd.Flags().Lookup("timestamp")); err != nil {
+		panic(err)
+	}
+}

cmd/chainverify.go

@@ -0,0 +1,45 @@
+// Copyright © 2021 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 (
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// chainVerifyCmd represents the chain verify command
+var chainVerifyCmd = &cobra.Command{
+	Use:   "verify",
+	Short: "Verify a beacon chain signature",
+	Long:  "Verify the signature for a given beacon chain structure is correct",
+}
+
+func init() {
+	chainCmd.AddCommand(chainVerifyCmd)
+}
+
+func chainVerifyFlags(cmd *cobra.Command) {
+	chainFlags(cmd)
+	cmd.Flags().String("validator", "", "The account, public key or index of the validator")
+	cmd.Flags().String("data", "", "The data to verify, as a JSON structure")
+}
+
+func chainVerifyBindings(cmd *cobra.Command) {
+	if err := viper.BindPFlag("validator", cmd.Flags().Lookup("validator")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("data", cmd.Flags().Lookup("data")); err != nil {
+		panic(err)
+	}
+}

cmd/chainverifysignedcontributionandproof.go

@@ -0,0 +1,50 @@
+// Copyright © 2021 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"
+	chainverifysignedcontributionandproof "github.com/wealdtech/ethdo/cmd/chain/verify/signedcontributionandproof"
+)
+
+var chainVerifySignedContributionAndProofCmd = &cobra.Command{
+	Use:   "signedcontributionandproof",
+	Short: "Verify a signed contribution and proof",
+	Long: `Verify a signed contribution and proof.  For example:
+
+    ethdo chain verify signedcontributionandproof --data=... --validator=...
+
+validator can be an account, a public key or an index.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := chainverifysignedcontributionandproof.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if res != "" {
+			fmt.Print(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	chainVerifyCmd.AddCommand(chainVerifySignedContributionAndProofCmd)
+	chainVerifyFlags(chainVerifySignedContributionAndProofCmd)
+}
+
+func chainVerifySignedContributionAndProofBindings(cmd *cobra.Command) {
+	chainVerifyBindings(cmd)
+}

cmd/depositverify.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019-2021 Weald Technology Limited.
 // 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
@@ -32,6 +32,7 @@ import (
 
 var depositVerifyData string
 var depositVerifyWithdrawalPubKey string
+var depositVerifyWithdrawalAddress string
 var depositVerifyValidatorPubKey string
 var depositVerifyDepositAmount string
 var depositVerifyForkVersion string
@@ -81,7 +82,14 @@ In quiet mode this will return 0 if the the data is verified correctly, otherwis
 			withdrawalPubKey, err := e2types.BLSPublicKeyFromBytes(withdrawalPubKeyBytes)
 			errCheck(err, "Value supplied with --withdrawalpubkey is not a valid public key")
 			withdrawalCredentials = eth2util.SHA256(withdrawalPubKey.Marshal())
-			withdrawalCredentials[0] = 0 // BLS_WITHDRAWAL_PREFIX
+			withdrawalCredentials[0] = 0x00 // BLS_WITHDRAWAL_PREFIX
+		} else if depositVerifyWithdrawalAddress != "" {
+			withdrawalAddressBytes, err := hex.DecodeString(strings.TrimPrefix(depositVerifyWithdrawalAddress, "0x"))
+			errCheck(err, "Invalid withdrawal address")
+			assert(len(withdrawalAddressBytes) == 20, "address should be 20 bytes")
+			withdrawalCredentials = make([]byte, 32)
+			withdrawalCredentials[0] = 0x01 // ETH1_ADDRESS_WITHDRAWAL_PREFIX
+			copy(withdrawalCredentials[12:], withdrawalAddressBytes)
 		}
 		outputIf(debug, fmt.Sprintf("Withdrawal credentials are %#x", withdrawalCredentials))
 
@@ -181,10 +189,10 @@ func validatorPubKeysFromInput(input string) (map[[48]byte]bool, error) {
 
 func verifyDeposit(deposit *util.DepositInfo, withdrawalCredentials []byte, validatorPubKeys map[[48]byte]bool, amount uint64) (bool, error) {
 	if withdrawalCredentials == nil {
-		outputIf(!quiet, "Withdrawal public key not supplied; withdrawal credentials NOT checked")
+		outputIf(!quiet, "Withdrawal public key or address not supplied; withdrawal credentials NOT checked")
 	} else {
 		if !bytes.Equal(deposit.WithdrawalCredentials, withdrawalCredentials) {
-			outputIf(!quiet, "Withdrawal public key incorrect")
+			outputIf(!quiet, "Withdrawal credentials incorrect")
 			return false, nil
 		}
 		outputIf(!quiet, "Withdrawal credentials verified")
@@ -246,7 +254,7 @@ func verifyDeposit(deposit *util.DepositInfo, withdrawalCredentials []byte, vali
 			if err != nil {
 				return false, errors.Wrap(err, "failed to decode fork version")
 			}
-			if bytes.Equal(deposit.ForkVersion, forkVersion[:]) {
+			if bytes.Equal(deposit.ForkVersion, forkVersion) {
 				outputIf(!quiet, "Fork version verified")
 			} else {
 				outputIf(!quiet, "Fork version incorrect")
@@ -263,6 +271,7 @@ func init() {
 	depositFlags(depositVerifyCmd)
 	depositVerifyCmd.Flags().StringVar(&depositVerifyData, "data", "", "JSON data, or path to JSON data")
 	depositVerifyCmd.Flags().StringVar(&depositVerifyWithdrawalPubKey, "withdrawalpubkey", "", "Public key of the account to which the validator funds will be withdrawn")
+	depositVerifyCmd.Flags().StringVar(&depositVerifyWithdrawalAddress, "withdrawaladdress", "", "Ethereum 1 address of the account to which the validator funds will be withdrawn")
 	depositVerifyCmd.Flags().StringVar(&depositVerifyDepositAmount, "depositvalue", "32 Ether", "Value of the amount to be deposited")
 	depositVerifyCmd.Flags().StringVar(&depositVerifyValidatorPubKey, "validatorpubkey", "", "Public key(s) of the account(s) that will be carrying out validation")
 	depositVerifyCmd.Flags().StringVar(&depositVerifyForkVersion, "forkversion", "0x00000000", "Fork version of the chain of the deposit")

cmd/exitverify.go

@@ -70,7 +70,9 @@ In quiet mode this will return 0 if the the exit is verified correctly, otherwis
 		}
 		exitRoot, err := exit.HashTreeRoot()
 		errCheck(err, "Failed to obtain exit hash tree root")
-		sig, err := e2types.BLSSignatureFromBytes(data.Exit.Signature[:])
+		signatureBytes := make([]byte, 96)
+		copy(signatureBytes, data.Exit.Signature[:])
+		sig, err := e2types.BLSSignatureFromBytes(signatureBytes)
 		errCheck(err, "Invalid signature")
 		verified, err := util.VerifyRoot(account, exitRoot, exitDomain, sig)
 		errCheck(err, "Failed to verify voluntary exit")

cmd/node/events/input.go

@@ -52,7 +52,7 @@ func input(ctx context.Context) (*dataIn, error) {
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, viper.GetString("connection"), viper.GetDuration("timeout"), viper.GetBool("allow-insecure-connections"))
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to connect to Ethereum 2 beacon node")
+		return nil, err
 	}
 
 	return data, nil

cmd/node/events/input_internal_test.go

@@ -66,7 +66,7 @@ func TestInput(t *testing.T) {
 			vars: map[string]interface{}{
 				"timeout": "5s",
 			},
-			err: "failed to connect to Ethereum 2 beacon node: failed to connect to beacon node: problem with parameters: no address specified",
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
 		},
 		{
 			name: "ConnectionBad",
@@ -75,7 +75,7 @@ func TestInput(t *testing.T) {
 				"connection": "localhost:1",
 				"topics":     []string{"one", "two"},
 			},
-			err: "failed to connect to Ethereum 2 beacon node: failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
 		},
 		{
 			name: "TopicsNil",

cmd/node/events/process.go

@@ -23,8 +23,6 @@ import (
 	"github.com/pkg/errors"
 )
 
-var jsonOutput bool
-
 func process(ctx context.Context, data *dataIn) error {
 	if data == nil {
 		return errors.New("no data")

cmd/proposer.go

@@ -27,6 +27,3 @@ var proposerCmd = &cobra.Command{
 func init() {
 	RootCmd.AddCommand(proposerCmd)
 }
-
-func proposerFlags(cmd *cobra.Command) {
-}

cmd/root.go

@@ -1,4 +1,4 @@
-// Copyright © 2019 Weald Technology Trading
+// Copyright © 2019 - 2021 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
@@ -23,6 +23,7 @@ import (
 
 	homedir "github.com/mitchellh/go-homedir"
 	"github.com/pkg/errors"
+	"github.com/rs/zerolog"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 	"github.com/wealdtech/ethdo/util"
@@ -56,12 +57,28 @@ func persistentPreRunE(cmd *cobra.Command, args []string) error {
 		return nil
 	}
 
+	// Disable service logging.
+	zerolog.SetGlobalLevel(zerolog.Disabled)
+
 	// We bind viper here so that we bind to the correct command.
 	quiet = viper.GetBool("quiet")
 	verbose = viper.GetBool("verbose")
 	debug = viper.GetBool("debug")
-	// Command-specific bindings.
-	switch fmt.Sprintf("%s/%s", cmd.Parent().Name(), cmd.Name()) {
+
+	includeCommandBindings(cmd)
+
+	if quiet && verbose {
+		fmt.Println("Cannot supply both quiet and verbose flags")
+	}
+	if quiet && debug {
+		fmt.Println("Cannot supply both quiet and debug flags")
+	}
+
+	return util.SetupStore()
+}
+
+func includeCommandBindings(cmd *cobra.Command) {
+	switch commandPath(cmd) {
 	case "account/create":
 		accountCreateBindings()
 	case "account/derive":
@@ -72,14 +89,24 @@ func persistentPreRunE(cmd *cobra.Command, args []string) error {
 		attesterDutiesBindings()
 	case "attester/inclusion":
 		attesterInclusionBindings()
+	case "block/analyze":
+		blockAnalyzeBindings()
 	case "block/info":
 		blockInfoBindings()
+	case "chain/time":
+		chainTimeBindings()
+	case "chain/verify/signedcontributionandproof":
+		chainVerifySignedContributionAndProofBindings(cmd)
 	case "exit/verify":
 		exitVerifyBindings()
 	case "node/events":
 		nodeEventsBindings()
 	case "slot/time":
 		slotTimeBindings()
+	case "synccommittee/inclusion":
+		synccommitteeInclusionBindings()
+	case "synccommittee/members":
+		synccommitteeMembersBindings()
 	case "validator/depositdata":
 		validatorDepositdataBindings()
 	case "validator/duties":
@@ -88,24 +115,19 @@ func persistentPreRunE(cmd *cobra.Command, args []string) error {
 		validatorExitBindings()
 	case "validator/info":
 		validatorInfoBindings()
+	case "validator/keycheck":
+		validatorKeycheckBindings()
+	case "validator/expectation":
+		validatorExpectationBindings()
 	case "wallet/create":
 		walletCreateBindings()
 	case "wallet/import":
 		walletImportBindings()
+	case "wallet/sharedexport":
+		walletSharedExportBindings()
+	case "wallet/sharedimport":
+		walletSharedImportBindings()
 	}
-
-	if quiet && verbose {
-		fmt.Println("Cannot supply both quiet and verbose flags")
-	}
-	if quiet && debug {
-		fmt.Println("Cannot supply both quiet and debug flags")
-	}
-
-	if err := util.SetupStore(); err != nil {
-		return err
-	}
-
-	return nil
 }
 
 // Execute adds all child commands to the root command and sets flags appropriately.
@@ -187,7 +209,7 @@ func init() {
 	if err := viper.BindPFlag("debug", RootCmd.PersistentFlags().Lookup("debug")); err != nil {
 		panic(err)
 	}
-	RootCmd.PersistentFlags().String("connection", "localhost:4000", "connection to an Ethereum 2 node")
+	RootCmd.PersistentFlags().String("connection", "http://localhost:3500", "URL to an Ethereum 2 node's RET API endpoint")
 	if err := viper.BindPFlag("connection", RootCmd.PersistentFlags().Lookup("connection")); err != nil {
 		panic(err)
 	}
@@ -379,3 +401,14 @@ func remotesToEndpoints(remotes []string) ([]*dirk.Endpoint, error) {
 func relockAccount(locker e2wtypes.AccountLocker) {
 	errCheck(locker.Lock(context.Background()), "failed to re-lock account")
 }
+
+func commandPath(cmd *cobra.Command) string {
+	path := ""
+	for {
+		path = fmt.Sprintf("%s/%s", cmd.Name(), path)
+		if cmd.Parent().Name() == "ethdo" {
+			return strings.TrimRight(path, "/")
+		}
+		cmd = cmd.Parent()
+	}
+}

cmd/slot/time/input.go

@@ -54,7 +54,7 @@ func input(ctx context.Context) (*dataIn, error) {
 	var err error
 	data.eth2Client, err = util.ConnectToBeaconNode(ctx, viper.GetString("connection"), viper.GetDuration("timeout"), viper.GetBool("allow-insecure-connections"))
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to connect to Ethereum 2 beacon node")
+		return nil, err
 	}
 
 	return data, nil

cmd/slot/time/input_internal_test.go

@@ -73,7 +73,7 @@ func TestInput(t *testing.T) {
 				"timeout": "5s",
 				"slot":    "1",
 			},
-			err: "failed to connect to Ethereum 2 beacon node: failed to connect to beacon node: problem with parameters: no address specified",
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
 		},
 	}
 

cmd/slot/time/output.go

@@ -40,5 +40,5 @@ func output(ctx context.Context, data *dataOut) (string, error) {
 	if data.verbose {
 		return fmt.Sprintf("%s - %s", data.startTime, data.endTime), nil
 	}
-	return fmt.Sprintf("%s", data.startTime), nil
+	return data.startTime.String(), nil
 }

cmd/slot/time/process.go

@@ -53,7 +53,7 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 
 	slotDuration := config["SECONDS_PER_SLOT"].(time.Duration)
 
-	results.startTime = genesis.GenesisTime.Add(time.Duration((time.Duration(slot*int64(slotDuration.Seconds())) * time.Second)))
+	results.startTime = genesis.GenesisTime.Add((time.Duration(slot*int64(slotDuration.Seconds())) * time.Second))
 	results.endTime = results.startTime.Add(slotDuration)
 
 	return results, nil

cmd/synccommittee.go

@@ -0,0 +1,32 @@
+// Copyright © 2021 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 (
+	"github.com/spf13/cobra"
+)
+
+// synccommitteeCmd represents the synccommittee command
+var synccommitteeCmd = &cobra.Command{
+	Use:   "synccommittee",
+	Short: "Obtain information about Ethereum 2 sync committees",
+	Long:  "Obtain information about Ethereum 2 sync committees",
+}
+
+func init() {
+	RootCmd.AddCommand(synccommitteeCmd)
+}
+
+func synccommitteeFlags(cmd *cobra.Command) {
+}

cmd/synccommittee/inclusion/command.go

@@ -0,0 +1,83 @@
+// Copyright © 2022 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 inclusion
+
+import (
+	"context"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+	"github.com/wealdtech/ethdo/services/chaintime"
+)
+
+type command struct {
+	quiet   bool
+	verbose bool
+	debug   bool
+
+	// Beacon node connection.
+	timeout                  time.Duration
+	connection               string
+	allowInsecureConnections bool
+
+	// Input.
+	account string
+	pubKey  string
+	index   string
+	epoch   int64
+
+	// Data access.
+	eth2Client eth2client.Service
+	chainTime  chaintime.Service
+
+	// Output.
+	inCommittee    bool
+	committeeIndex uint64
+	inclusions     []int
+}
+
+func newCommand(ctx context.Context) (*command, error) {
+	c := &command{
+		quiet:   viper.GetBool("quiet"),
+		verbose: viper.GetBool("verbose"),
+		debug:   viper.GetBool("debug"),
+	}
+
+	// Timeout.
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	c.timeout = viper.GetDuration("timeout")
+
+	if viper.GetString("connection") == "" {
+		return nil, errors.New("connection is required")
+	}
+	c.connection = viper.GetString("connection")
+	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+
+	// Validator.
+	c.account = viper.GetString("account")
+	c.pubKey = viper.GetString("pubkey")
+	c.index = viper.GetString("index")
+	if c.account == "" && c.pubKey == "" && c.index == "" {
+		return nil, errors.New("account, pubkey or index required")
+	}
+
+	// Epoch.
+	c.epoch = viper.GetInt64("epoch")
+
+	return c, nil
+}

cmd/synccommittee/inclusion/command_internal_test.go

@@ -0,0 +1,82 @@
+// Copyright © 2022 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 inclusion
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInput(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: "TimeoutMissing",
+			vars: map[string]interface{}{},
+			err:  "timeout is required",
+		},
+		{
+			name: "ConnectionMissing",
+			vars: map[string]interface{}{
+				"validators": "1",
+				"timeout":    "5s",
+			},
+			err: "connection is required",
+		},
+		{
+			name: "NoValidator",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+			err: "account, pubkey or index required",
+		},
+		{
+			name: "Good",
+			vars: map[string]interface{}{
+				"validators": "1",
+				"timeout":    "5s",
+				"index":      "1",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			_, err := newCommand(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

cmd/synccommittee/inclusion/output.go

@@ -0,0 +1,81 @@
+// Copyright © 2022 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 inclusion
+
+import (
+	"context"
+	"fmt"
+	"strings"
+)
+
+func (c *command) output(ctx context.Context) (string, error) {
+	if c.quiet {
+		return "", nil
+	}
+
+	builder := strings.Builder{}
+
+	if c.verbose {
+		builder.WriteString("Epoch: ")
+		builder.WriteString(fmt.Sprintf("%d\n", c.epoch))
+	}
+
+	if !c.inCommittee {
+		builder.WriteString("Validator not in sync committee")
+	} else {
+		if c.verbose {
+			builder.WriteString("Validator sync committee index ")
+			builder.WriteString(fmt.Sprintf("%d\n", c.committeeIndex))
+		}
+
+		noBlock := 0
+		included := 0
+		missed := 0
+		for _, inclusion := range c.inclusions {
+			switch inclusion {
+			case 0:
+				noBlock++
+			case 1:
+				included++
+			case 2:
+				missed++
+			}
+		}
+		builder.WriteString("Expected: ")
+		builder.WriteString(fmt.Sprintf("%d", len(c.inclusions)))
+		builder.WriteString("\nIncluded: ")
+		builder.WriteString(fmt.Sprintf("%d", included))
+		builder.WriteString("\nMissed: ")
+		builder.WriteString(fmt.Sprintf("%d", missed))
+		builder.WriteString("\nNo block: ")
+		builder.WriteString(fmt.Sprintf("%d", noBlock))
+
+		builder.WriteString("\nPer-slot result: ")
+		for i, inclusion := range c.inclusions {
+			switch inclusion {
+			case 0:
+				builder.WriteString("-")
+			case 1:
+				builder.WriteString("✓")
+			case 2:
+				builder.WriteString("✕")
+			}
+			if i%8 == 7 && i != len(c.inclusions)-1 {
+				builder.WriteString(" ")
+			}
+		}
+	}
+
+	return builder.String(), nil
+}

cmd/synccommittee/inclusion/process.go

@@ -0,0 +1,130 @@
+// Copyright © 2022 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 inclusion
+
+import (
+	"context"
+	"fmt"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"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"
+	"github.com/wealdtech/ethdo/util"
+)
+
+func (c *command) process(ctx context.Context) error {
+	// Obtain information we need to process.
+	if err := c.setup(ctx); err != nil {
+		return err
+	}
+
+	firstSlot, lastSlot := c.calculateSlots(ctx)
+
+	validatorIndex, err := util.ValidatorIndex(ctx, c.eth2Client, c.account, c.pubKey, c.index)
+	if err != nil {
+		return err
+	}
+
+	syncCommittee, err := c.eth2Client.(eth2client.SyncCommitteesProvider).SyncCommitteeAtEpoch(ctx, "head", phase0.Epoch(c.epoch))
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain sync committee information")
+	}
+
+	if syncCommittee == nil {
+		return errors.New("no sync committee returned")
+	}
+
+	for i := range syncCommittee.Validators {
+		if syncCommittee.Validators[i] == validatorIndex {
+			c.inCommittee = true
+			c.committeeIndex = uint64(i)
+			break
+		}
+	}
+
+	if c.inCommittee {
+		// This validator is in the sync committee.  Check blocks to see where it has been included.
+		c.inclusions = make([]int, 0)
+		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))
+			if err != nil {
+				return err
+			}
+			if block == nil {
+				c.inclusions = append(c.inclusions, 0)
+				continue
+			}
+			var aggregate *altair.SyncAggregate
+			switch block.Version {
+			case spec.DataVersionAltair:
+				aggregate = block.Altair.Message.Body.SyncAggregate
+				if aggregate.SyncCommitteeBits.BitAt(c.committeeIndex) {
+					c.inclusions = append(c.inclusions, 1)
+				} else {
+					c.inclusions = append(c.inclusions, 2)
+				}
+			case spec.DataVersionBellatrix:
+				aggregate = block.Bellatrix.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)
+			}
+		}
+	}
+
+	return nil
+}
+
+func (c *command) setup(ctx context.Context) error {
+	var err error
+
+	// Connect to the client.
+	c.eth2Client, err = util.ConnectToBeaconNode(ctx, c.connection, c.timeout, c.allowInsecureConnections)
+	if err != nil {
+		return err
+	}
+
+	c.chainTime, err = standardchaintime.New(ctx,
+		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
+		standardchaintime.WithForkScheduleProvider(c.eth2Client.(eth2client.ForkScheduleProvider)),
+		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+	)
+	if err != nil {
+		return errors.Wrap(err, "failed to set up chaintime service")
+	}
+
+	return nil
+}
+
+func (c *command) calculateSlots(ctx context.Context) (phase0.Slot, phase0.Slot) {
+	var firstSlot phase0.Slot
+	var lastSlot phase0.Slot
+	if c.epoch == -1 {
+		c.epoch = int64(c.chainTime.CurrentEpoch()) - 1
+	}
+	firstSlot = c.chainTime.FirstSlotOfEpoch(phase0.Epoch(c.epoch))
+	lastSlot = c.chainTime.FirstSlotOfEpoch(phase0.Epoch(c.epoch) + 1)
+
+	return firstSlot, lastSlot
+}

cmd/synccommittee/inclusion/process_internal_test.go

@@ -0,0 +1,72 @@
+// Copyright © 2022 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 inclusion
+
+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: "InvalidConnection",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"index":      "1",
+				"connection": "invalid",
+			},
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
+		},
+		{
+			name: "Good",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"index":      "1",
+				"epoch":      "-1",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	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/synccommittee/inclusion/run.go

@@ -0,0 +1,50 @@
+// Copyright © 2022 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 inclusion
+
+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/synccommittee/members/input.go

@@ -0,0 +1,74 @@
+// Copyright © 2021 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 members
+
+import (
+	"context"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+	"github.com/wealdtech/ethdo/services/chaintime"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
+	"github.com/wealdtech/ethdo/util"
+)
+
+type dataIn struct {
+	// System.
+	timeout time.Duration
+	quiet   bool
+	verbose bool
+	debug   bool
+	// Operation.
+	eth2Client eth2client.Service
+	chainTime  chaintime.Service
+	epoch      int64
+	period     string
+}
+
+func input(ctx context.Context) (*dataIn, error) {
+	data := &dataIn{}
+
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	data.timeout = viper.GetDuration("timeout")
+	data.quiet = viper.GetBool("quiet")
+	data.verbose = viper.GetBool("verbose")
+	data.debug = viper.GetBool("debug")
+
+	// Ethereum 2 client.
+	var err error
+	data.eth2Client, err = util.ConnectToBeaconNode(ctx, viper.GetString("connection"), viper.GetDuration("timeout"), viper.GetBool("allow-insecure-connections"))
+	if err != nil {
+		return nil, err
+	}
+
+	// Chain time.
+	data.chainTime, err = standardchaintime.New(ctx,
+		standardchaintime.WithGenesisTimeProvider(data.eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithForkScheduleProvider(data.eth2Client.(eth2client.ForkScheduleProvider)),
+		standardchaintime.WithSpecProvider(data.eth2Client.(eth2client.SpecProvider)),
+	)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to configure chaintime service")
+	}
+
+	// Epoch
+	data.epoch = viper.GetInt64("epoch")
+	data.period = viper.GetString("period")
+
+	return data, nil
+}

cmd/synccommittee/members/input_internal_test.go

@@ -0,0 +1,88 @@
+// Copyright © 2021 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 members
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+	"github.com/wealdtech/ethdo/testutil"
+	e2types "github.com/wealdtech/go-eth2-types/v2"
+	e2wallet "github.com/wealdtech/go-eth2-wallet"
+	keystorev4 "github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4"
+	nd "github.com/wealdtech/go-eth2-wallet-nd/v2"
+	scratch "github.com/wealdtech/go-eth2-wallet-store-scratch"
+	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
+)
+
+func TestInput(t *testing.T) {
+	if os.Getenv("ETHDO_TEST_CONNECTION") == "" {
+		t.Skip("ETHDO_TEST_CONNECTION not configured; cannot run tests")
+	}
+
+	require.NoError(t, e2types.InitBLS())
+
+	store := scratch.New()
+	require.NoError(t, e2wallet.UseStore(store))
+	testWallet, err := nd.CreateWallet(context.Background(), "Test wallet", store, keystorev4.New())
+	require.NoError(t, err)
+	require.NoError(t, testWallet.(e2wtypes.WalletLocker).Unlock(context.Background(), nil))
+	viper.Set("passphrase", "pass")
+	_, err = testWallet.(e2wtypes.WalletAccountImporter).ImportAccount(context.Background(),
+		"Interop 0",
+		testutil.HexToBytes("0x25295f0d1d592a90b333e26e85149708208e9f8e8bc18f6c77bd62f8ad7a6866"),
+		[]byte("pass"),
+	)
+	require.NoError(t, err)
+
+	tests := []struct {
+		name string
+		vars map[string]interface{}
+		res  *dataIn
+		err  string
+	}{
+		{
+			name: "TimeoutMissing",
+			vars: map[string]interface{}{},
+			err:  "timeout is required",
+		},
+		{
+			name: "ConnectionMissing",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+			},
+			err: "failed to connect to beacon node: failed to connect to Ethereum 2 client with any known method",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			res, err := input(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, test.res.timeout, res.timeout)
+			}
+		})
+	}
+}

cmd/synccommittee/members/output.go

@@ -0,0 +1,61 @@
+// Copyright © 2021 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 members
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"strings"
+
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+)
+
+type dataOut struct {
+	debug      bool
+	quiet      bool
+	verbose    bool
+	json       bool
+	validators []phase0.ValidatorIndex
+}
+
+func output(ctx context.Context, data *dataOut) (string, error) {
+	if data == nil {
+		return "", errors.New("no data")
+	}
+
+	if data.quiet {
+		return "", nil
+	}
+
+	if data.validators == nil {
+		return "No sync committee validators found", nil
+	}
+
+	if data.json {
+		bytes, err := json.Marshal(data.validators)
+		if err != nil {
+			return "", errors.Wrap(err, "failed to marshal JSON")
+		}
+		return string(bytes), nil
+	}
+
+	validators := make([]string, len(data.validators))
+	for i := range data.validators {
+		validators[i] = fmt.Sprintf("%d", data.validators[i])
+	}
+
+	return strings.Join(validators, ","), nil
+}

cmd/synccommittee/members/output_internal_test.go

@@ -0,0 +1,68 @@
+// Copyright © 2021 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 members
+
+import (
+	"context"
+	"testing"
+
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/stretchr/testify/require"
+)
+
+func TestOutput(t *testing.T) {
+	tests := []struct {
+		name    string
+		dataOut *dataOut
+		res     string
+		err     string
+	}{
+		{
+			name: "Nil",
+			err:  "no data",
+		},
+		{
+			name:    "Empty",
+			dataOut: &dataOut{},
+			res:     "No sync committee validators found",
+		},
+		{
+			name: "Present",
+			dataOut: &dataOut{
+				validators: []phase0.ValidatorIndex{1, 2, 3},
+			},
+			res: "1,2,3",
+		},
+		{
+			name: "JSON",
+			dataOut: &dataOut{
+				json:       true,
+				validators: []phase0.ValidatorIndex{1, 2, 3},
+			},
+			res: "[1,2,3]",
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			res, err := output(context.Background(), test.dataOut)
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, test.res, res)
+			}
+		})
+	}
+}

cmd/synccommittee/members/process.go

@@ -0,0 +1,77 @@
+// Copyright © 2021 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 members
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/spec/phase0"
+	"github.com/pkg/errors"
+)
+
+func process(ctx context.Context, data *dataIn) (*dataOut, error) {
+	if data == nil {
+		return nil, errors.New("no data")
+	}
+
+	epoch, err := calculateEpoch(ctx, data)
+	if err != nil {
+		return nil, err
+	}
+
+	syncCommittee, err := data.eth2Client.(eth2client.SyncCommitteesProvider).SyncCommitteeAtEpoch(ctx, "head", epoch)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to obtain sync committee information")
+	}
+
+	if syncCommittee == nil {
+		return nil, errors.New("no sync committee returned")
+	}
+
+	results := &dataOut{
+		debug:      data.debug,
+		quiet:      data.quiet,
+		verbose:    data.verbose,
+		validators: syncCommittee.Validators,
+	}
+
+	return results, nil
+}
+
+func calculateEpoch(ctx context.Context, data *dataIn) (phase0.Epoch, error) {
+	var epoch phase0.Epoch
+	if data.epoch != -1 {
+		epoch = phase0.Epoch(data.epoch)
+	} else {
+		switch strings.ToLower(data.period) {
+		case "", "current":
+			epoch = data.chainTime.CurrentEpoch()
+		case "next":
+			period := data.chainTime.SlotToSyncCommitteePeriod(data.chainTime.CurrentSlot())
+			nextPeriod := period + 1
+			epoch = data.chainTime.FirstEpochOfSyncPeriod(nextPeriod)
+		default:
+			return 0, fmt.Errorf("period %s not known", data.period)
+		}
+	}
+
+	if data.debug {
+		fmt.Printf("epoch is %d\n", epoch)
+	}
+
+	return epoch, nil
+}

cmd/synccommittee/members/process_internal_test.go

@@ -0,0 +1,74 @@
+// Copyright © 2021 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 members
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/attestantio/go-eth2-client/auto"
+	"github.com/rs/zerolog"
+	"github.com/stretchr/testify/require"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
+)
+
+func TestProcess(t *testing.T) {
+	if os.Getenv("ETHDO_TEST_CONNECTION") == "" {
+		t.Skip("ETHDO_TEST_CONNECTION not configured; cannot run tests")
+	}
+	eth2Client, err := auto.New(context.Background(),
+		auto.WithLogLevel(zerolog.Disabled),
+		auto.WithAddress(os.Getenv("ETHDO_TEST_CONNECTION")),
+	)
+	require.NoError(t, err)
+
+	chainTime, err := standardchaintime.New(context.Background(),
+		standardchaintime.WithGenesisTimeProvider(eth2Client.(eth2client.GenesisTimeProvider)),
+		standardchaintime.WithForkScheduleProvider(eth2Client.(eth2client.ForkScheduleProvider)),
+		standardchaintime.WithSpecProvider(eth2Client.(eth2client.SpecProvider)),
+	)
+	require.NoError(t, err)
+
+	tests := []struct {
+		name   string
+		dataIn *dataIn
+		err    string
+	}{
+		{
+			name: "Nil",
+			err:  "no data",
+		},
+		{
+			name: "Good",
+			dataIn: &dataIn{
+				eth2Client: eth2Client,
+				chainTime:  chainTime,
+				epoch:      -1,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			_, err := process(context.Background(), test.dataIn)
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

cmd/synccommittee/members/run.go

@@ -0,0 +1,50 @@
+// Copyright © 2021 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 members
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+)
+
+// Run runs the wallet create data command.
+func Run(cmd *cobra.Command) (string, error) {
+	ctx := context.Background()
+	dataIn, err := input(ctx)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to obtain input")
+	}
+
+	// Further errors do not need a usage report.
+	cmd.SilenceUsage = true
+
+	dataOut, err := process(ctx, dataIn)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to process")
+	}
+
+	if viper.GetBool("quiet") {
+		return "", nil
+	}
+
+	results, err := output(ctx, dataOut)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to obtain output")
+	}
+
+	return results, nil
+}

cmd/synccommitteeinclusion.go

@@ -0,0 +1,67 @@
+// Copyright © 2022 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"
+	synccommitteeinclusion "github.com/wealdtech/ethdo/cmd/synccommittee/inclusion"
+)
+
+var synccommitteeInclusionCmd = &cobra.Command{
+	Use:   "inclusion",
+	Short: "Obtain sync committee inclusion data for a validator",
+	Long: `Obtain sync committee inclusion data for a validator.  For example:
+
+    ethdo synccommittee inclusion --epoch=12345 --index=11111
+
+In quiet mode this will return 0 if the validator was in the sync committee, otherwise 1.
+
+epoch can be a specific epoch; If not supplied all slots for the current sync committee period will be provided`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := synccommitteeinclusion.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if viper.GetBool("quiet") {
+			return nil
+		}
+		if res != "" {
+			fmt.Println(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	synccommitteeCmd.AddCommand(synccommitteeInclusionCmd)
+	synccommitteeFlags(synccommitteeInclusionCmd)
+	synccommitteeInclusionCmd.Flags().Int64("epoch", -1, "the epoch for which to fetch sync committee inclusion")
+	synccommitteeInclusionCmd.Flags().String("pubkey", "", "validator public key for sync committee")
+	synccommitteeInclusionCmd.Flags().String("index", "", "validator index for sync committee")
+}
+
+func synccommitteeInclusionBindings() {
+	if err := viper.BindPFlag("epoch", synccommitteeInclusionCmd.Flags().Lookup("epoch")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("pubkey", synccommitteeInclusionCmd.Flags().Lookup("pubkey")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("index", synccommitteeInclusionCmd.Flags().Lookup("index")); err != nil {
+		panic(err)
+	}
+}

cmd/synccommitteemembers.go

@@ -0,0 +1,63 @@
+// Copyright © 2021 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"
+	synccommitteemembers "github.com/wealdtech/ethdo/cmd/synccommittee/members"
+)
+
+var synccommitteeMembersCmd = &cobra.Command{
+	Use:   "members",
+	Short: "Obtain information about members of a synccommittee",
+	Long: `Obtain information about members of a synccommittee.  For example:
+
+    ethdo synccommittee members --epoch=12345
+
+In quiet mode this will return 0 if the synccommittee members are found, otherwise 1.
+
+epoch can be a specific epoch.  period can be 'current' for the current sync period or 'next' for the next sync period`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := synccommitteemembers.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if viper.GetBool("quiet") {
+			return nil
+		}
+		if res != "" {
+			fmt.Println(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	synccommitteeCmd.AddCommand(synccommitteeMembersCmd)
+	synccommitteeFlags(synccommitteeMembersCmd)
+	synccommitteeMembersCmd.Flags().Int64("epoch", -1, "the epoch for which to fetch sync committees")
+	synccommitteeMembersCmd.Flags().String("period", "", "the sync committee period for which to fetch sync committees ('current', 'next')")
+}
+
+func synccommitteeMembersBindings() {
+	if err := viper.BindPFlag("epoch", synccommitteeMembersCmd.Flags().Lookup("epoch")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("period", synccommitteeMembersCmd.Flags().Lookup("period")); err != nil {
+		panic(err)
+	}
+}

cmd/validator/depositdata/input.go

@@ -17,25 +17,28 @@ import (
 	"context"
 	"encoding/hex"
 	"strings"
+	"time"
 
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/spf13/viper"
 	ethdoutil "github.com/wealdtech/ethdo/util"
 	e2types "github.com/wealdtech/go-eth2-types/v2"
-	util "github.com/wealdtech/go-eth2-util"
 	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
 	string2eth "github.com/wealdtech/go-string2eth"
 )
 
 type dataIn struct {
-	format                string
-	withdrawalCredentials []byte
-	amount                spec.Gwei
-	validatorAccounts     []e2wtypes.Account
-	forkVersion           *spec.Version
-	domain                *spec.Domain
-	passphrases           []string
+	format            string
+	timeout           time.Duration
+	withdrawalAccount string
+	withdrawalPubKey  string
+	withdrawalAddress string
+	amount            spec.Gwei
+	validatorAccounts []e2wtypes.Account
+	forkVersion       *spec.Version
+	domain            *spec.Domain
+	passphrases       []string
 }
 
 func input() (*dataIn, error) {
@@ -49,6 +52,11 @@ func input() (*dataIn, error) {
 		return nil, errors.New("validator account is required")
 	}
 
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	data.timeout = viper.GetDuration("timeout")
+
 	ctx, cancel := context.WithTimeout(context.Background(), viper.GetDuration("timeout"))
 	defer cancel()
 	_, data.validatorAccounts, err = ethdoutil.WalletAndAccountsFromPath(ctx, viper.GetString("validatoraccount"))
@@ -70,37 +78,25 @@ func input() (*dataIn, error) {
 
 	data.passphrases = ethdoutil.GetPassphrases()
 
-	switch {
-	case viper.GetString("withdrawalaccount") != "":
-		ctx, cancel := context.WithTimeout(context.Background(), viper.GetDuration("timeout"))
-		defer cancel()
-		_, withdrawalAccount, err := ethdoutil.WalletAndAccountFromPath(ctx, viper.GetString("withdrawalaccount"))
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to obtain withdrawal account")
-		}
-		pubKey, err := ethdoutil.BestPublicKey(withdrawalAccount)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to obtain public key for withdrawal account")
-		}
-		data.withdrawalCredentials = util.SHA256(pubKey.Marshal())
-	case viper.GetString("withdrawalpubkey") != "":
-		withdrawalPubKeyBytes, err := hex.DecodeString(strings.TrimPrefix(viper.GetString("withdrawalpubkey"), "0x"))
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to decode withdrawal public key")
-		}
-		if len(withdrawalPubKeyBytes) != 48 {
-			return nil, errors.New("withdrawal public key must be exactly 48 bytes in length")
-		}
-		withdrawalPubKey, err := e2types.BLSPublicKeyFromBytes(withdrawalPubKeyBytes)
-		if err != nil {
-			return nil, errors.Wrap(err, "withdrawal public key is not valid")
-		}
-		data.withdrawalCredentials = util.SHA256(withdrawalPubKey.Marshal())
-	default:
-		return nil, errors.New("withdrawalaccount or withdrawal public key is required")
+	data.withdrawalAccount = viper.GetString("withdrawalaccount")
+	data.withdrawalPubKey = viper.GetString("withdrawalpubkey")
+	data.withdrawalAddress = viper.GetString("withdrawaladdress")
+	withdrawalDetailsPresent := 0
+	if data.withdrawalAccount != "" {
+		withdrawalDetailsPresent++
+	}
+	if data.withdrawalPubKey != "" {
+		withdrawalDetailsPresent++
+	}
+	if data.withdrawalAddress != "" {
+		withdrawalDetailsPresent++
+	}
+	if withdrawalDetailsPresent == 0 {
+		return nil, errors.New("withdrawal account, public key or address is required")
+	}
+	if withdrawalDetailsPresent > 1 {
+		return nil, errors.New("only one of withdrawal account, public key or address is allowed")
 	}
-	// This is hard-coded, to allow deposit data to be generated without a connection to the beacon node.
-	data.withdrawalCredentials[0] = byte(0) // BLS_WITHDRAWAL_PREFIX
 
 	if viper.GetString("depositvalue") == "" {
 		return nil, errors.New("deposit value is required")
@@ -135,7 +131,7 @@ func inputForkVersion(ctx context.Context) (*spec.Version, error) {
 		if err != nil {
 			return nil, errors.Wrap(err, "failed to decode fork version")
 		}
-		if len(forkVersion) != 4 {
+		if len(data) != 4 {
 			return nil, errors.New("fork version must be exactly 4 bytes in length")
 		}
 

cmd/validator/depositdata/input_internal_test.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019-2021 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
@@ -84,9 +84,20 @@ func TestInput(t *testing.T) {
 			name: "Nil",
 			err:  "validator account is required",
 		},
+		{
+			name: "TimeoutMissing",
+			vars: map[string]interface{}{
+				"validatoraccount":  "Test/Interop 0",
+				"withdrawalaccount": "Test/Interop 0",
+				"depositvalue":      "32 Ether",
+				"forkversion":       "0x01020304",
+			},
+			err: "timeout is required",
+		},
 		{
 			name: "ValidatorAccountMissing",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"withdrawalaccount": "Test/Interop 0",
 				"depositvalue":      "32 Ether",
 				"forkversion":       "0x01020304",
@@ -96,6 +107,7 @@ func TestInput(t *testing.T) {
 		{
 			name: "ValidatorAccountUnknown",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"validatoraccount":  "Test/Unknown",
 				"withdrawalaccount": "Test/Interop 0",
 				"depositvalue":      "32 Ether",
@@ -104,59 +116,74 @@ func TestInput(t *testing.T) {
 			err: "unknown validator account",
 		},
 		{
-			name: "WithdrawalAccountMissing",
+			name: "WithdrawalDetailsMissing",
 			vars: map[string]interface{}{
+				"timeout":          "10s",
 				"launchpad":        true,
 				"validatoraccount": "Test/Interop 0",
 				"depositvalue":     "32 Ether",
 				"forkversion":      "0x01020304",
 			},
-			err: "withdrawalaccount or withdrawal public key is required",
+			err: "withdrawal account, public key or address is required",
 		},
 		{
-			name: "WithdrawalAccountUnknown",
+			name: "WithdrawalDetailsTooMany1",
 			vars: map[string]interface{}{
-				"raw":               true,
+				"timeout":           "10s",
+				"launchpad":         true,
 				"validatoraccount":  "Test/Interop 0",
-				"withdrawalaccount": "Test/Unknown",
+				"withdrawalaccount": "Test/Interop 0",
+				"withdrawalpubkey":  "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
 				"depositvalue":      "32 Ether",
 				"forkversion":       "0x01020304",
 			},
-			err: "failed to obtain withdrawal account: failed to obtain account: no account with name \"Unknown\"",
+			err: "only one of withdrawal account, public key or address is allowed",
 		},
 		{
-			name: "WithdrawalPubKeyInvalid",
+			name: "WithdrawalDetailsTooMany2",
 			vars: map[string]interface{}{
-				"validatoraccount": "Test/Interop 0",
-				"withdrawalpubkey": "invalid",
-				"depositvalue":     "32 Ether",
-				"forkversion":      "0x01020304",
+				"timeout":           "10s",
+				"launchpad":         true,
+				"validatoraccount":  "Test/Interop 0",
+				"withdrawalaccount": "Test/Interop 0",
+				"withdrawalpubkey":  "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
+				"withdrawaladdress": "0x30C99930617B7b793beaB603ecEB08691005f2E5",
+				"depositvalue":      "32 Ether",
+				"forkversion":       "0x01020304",
 			},
-			err: "failed to decode withdrawal public key: encoding/hex: invalid byte: U+0069 'i'",
+			err: "only one of withdrawal account, public key or address is allowed",
 		},
 		{
-			name: "WithdrawalPubKeyWrongLength",
+			name: "WithdrawalDetailsTooMany3",
 			vars: map[string]interface{}{
-				"validatoraccount": "Test/Interop 0",
-				"withdrawalpubkey": "0xb89bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0bff",
-				"depositvalue":     "32 Ether",
-				"forkversion":      "0x01020304",
+				"timeout":           "10s",
+				"launchpad":         true,
+				"validatoraccount":  "Test/Interop 0",
+				"withdrawalpubkey":  "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
+				"withdrawaladdress": "0x30C99930617B7b793beaB603ecEB08691005f2E5",
+				"depositvalue":      "32 Ether",
+				"forkversion":       "0x01020304",
 			},
-			err: "withdrawal public key must be exactly 48 bytes in length",
+			err: "only one of withdrawal account, public key or address is allowed",
 		},
 		{
-			name: "WithdrawalPubKeyNotPubKey",
+			name: "WithdrawalDetailsTooMany4",
 			vars: map[string]interface{}{
-				"validatoraccount": "Test/Interop 0",
-				"withdrawalpubkey": "0x089bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0b",
-				"depositvalue":     "32 Ether",
-				"forkversion":      "0x01020304",
+				"timeout":           "10s",
+				"launchpad":         true,
+				"validatoraccount":  "Test/Interop 0",
+				"withdrawalaccount": "Test/Interop 0",
+				"withdrawalpubkey":  "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
+				"withdrawaladdress": "0x30C99930617B7b793beaB603ecEB08691005f2E5",
+				"depositvalue":      "32 Ether",
+				"forkversion":       "0x01020304",
 			},
-			err: "withdrawal public key is not valid: failed to deserialize public key: err blsPublicKeyDeserialize 089bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0b",
+			err: "only one of withdrawal account, public key or address is allowed",
 		},
 		{
 			name: "DepositValueMissing",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"validatoraccount":  "Test/Interop 0",
 				"withdrawalaccount": "Test/Interop 0",
 				"forkversion":       "0x01020304",
@@ -166,6 +193,7 @@ func TestInput(t *testing.T) {
 		{
 			name: "DepositValueTooSmall",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"validatoraccount":  "Test/Interop 0",
 				"withdrawalaccount": "Test/Interop 0",
 				"depositvalue":      "1000 Wei",
@@ -176,6 +204,7 @@ func TestInput(t *testing.T) {
 		{
 			name: "DepositValueInvalid",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"validatoraccount":  "Test/Interop 0",
 				"withdrawalaccount": "Test/Interop 0",
 				"depositvalue":      "1 groat",
@@ -186,6 +215,7 @@ func TestInput(t *testing.T) {
 		{
 			name: "ForkVersionInvalid",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"validatoraccount":  "Test/Interop 0",
 				"withdrawalaccount": "Test/Interop 0",
 				"depositvalue":      "32 Ether",
@@ -193,54 +223,68 @@ func TestInput(t *testing.T) {
 			},
 			err: "failed to obtain fork version: failed to decode fork version: encoding/hex: invalid byte: U+0069 'i'",
 		},
+		{
+			name: "ForkVersionShort",
+			vars: map[string]interface{}{
+				"timeout":           "10s",
+				"validatoraccount":  "Test/Interop 0",
+				"withdrawalaccount": "Test/Interop 0",
+				"depositvalue":      "32 Ether",
+				"forkversion":       "0x01",
+			},
+			err: "failed to obtain fork version: fork version must be exactly 4 bytes in length",
+		},
 		{
 			name: "Good",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"validatoraccount":  "Test/Interop 0",
 				"withdrawalaccount": "Test/Interop 0",
 				"depositvalue":      "32 Ether",
 			},
 			res: &dataIn{
-				format:                "json",
-				withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
-				amount:                32000000000,
-				validatorAccounts:     []e2wtypes.Account{interop0},
-				forkVersion:           mainnetForkVersion,
-				domain:                mainnetDomain,
+				format:            "json",
+				withdrawalAccount: "Test/Interop 0",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       mainnetForkVersion,
+				domain:            mainnetDomain,
 			},
 		},
 		{
 			name: "GoodForkVersionOverride",
 			vars: map[string]interface{}{
+				"timeout":           "10s",
 				"validatoraccount":  "Test/Interop 0",
 				"withdrawalaccount": "Test/Interop 0",
 				"depositvalue":      "32 Ether",
 				"forkversion":       "0x01020304",
 			},
 			res: &dataIn{
-				format:                "json",
-				withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
-				amount:                32000000000,
-				validatorAccounts:     []e2wtypes.Account{interop0},
-				forkVersion:           forkVersion,
-				domain:                domain,
+				format:            "json",
+				withdrawalAccount: "Test/Interop 0",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
 			},
 		},
 		{
 			name: "GoodWithdrawalPubKey",
 			vars: map[string]interface{}{
+				"timeout":          "10s",
 				"validatoraccount": "Test/Interop 0",
 				"withdrawalpubkey": "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
 				"depositvalue":     "32 Ether",
 				"forkversion":      "0x01020304",
 			},
 			res: &dataIn{
-				format:                "json",
-				withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
-				amount:                32000000000,
-				validatorAccounts:     []e2wtypes.Account{interop0},
-				forkVersion:           forkVersion,
-				domain:                domain,
+				format:            "json",
+				withdrawalPubKey:  "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
 			},
 		},
 	}
@@ -258,7 +302,9 @@ func TestInput(t *testing.T) {
 				require.NoError(t, err)
 				// Cannot compare accounts directly, so need to check each element individually.
 				require.Equal(t, test.res.format, res.format)
-				require.Equal(t, test.res.withdrawalCredentials, res.withdrawalCredentials)
+				require.Equal(t, test.res.withdrawalAccount, res.withdrawalAccount)
+				require.Equal(t, test.res.withdrawalAddress, res.withdrawalAddress)
+				require.Equal(t, test.res.withdrawalPubKey, res.withdrawalPubKey)
 				require.Equal(t, test.res.amount, res.amount)
 				require.Equal(t, test.res.forkVersion, res.forkVersion)
 				require.Equal(t, test.res.domain, res.domain)

cmd/validator/depositdata/output.go

@@ -109,6 +109,7 @@ 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",
 	}
 
 	if datum.validatorPubKey == nil {

cmd/validator/depositdata/output_internal_test.go

@@ -253,10 +253,15 @@ func TestOutputLaunchpad(t *testing.T) {
 		tmp := testutil.HexToSignature("0xb7a757a4c506ac6ac5f2d23e065de7d00dc9f5a6a3f9610a8b60b65f166379139ae382c91ecbbf5c9fabc34b1cd2cf8f0211488d50d8754716d8e72e17c1a00b5d9b37cc73767946790ebe66cf9669abfc5c25c67e1e2d1c2e11429d149c25a2")
 		signature = &tmp
 	}
-	var forkVersion *spec.Version
+	var forkVersionPyrmont *spec.Version
 	{
 		tmp := testutil.HexToVersion("0x00002009")
-		forkVersion = &tmp
+		forkVersionPyrmont = &tmp
+	}
+	var forkVersionPrater *spec.Version
+	{
+		tmp := testutil.HexToVersion("0x00001020")
+		forkVersionPrater = &tmp
 	}
 	var depositDataRoot *spec.Root
 	{
@@ -316,7 +321,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
 					amount:                32000000000,
 					signature:             signature,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositDataRoot:       depositDataRoot,
 					depositMessageRoot:    depositMessageRoot,
 				},
@@ -332,7 +337,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					validatorPubKey:    validatorPubKey,
 					amount:             32000000000,
 					signature:          signature,
-					forkVersion:        forkVersion,
+					forkVersion:        forkVersionPyrmont,
 					depositDataRoot:    depositDataRoot,
 					depositMessageRoot: depositMessageRoot,
 				},
@@ -348,7 +353,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					validatorPubKey:       validatorPubKey,
 					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
 					amount:                32000000000,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositDataRoot:       depositDataRoot,
 					depositMessageRoot:    depositMessageRoot,
 				},
@@ -364,7 +369,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					validatorPubKey:       validatorPubKey,
 					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
 					signature:             signature,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositDataRoot:       depositDataRoot,
 					depositMessageRoot:    depositMessageRoot,
 				},
@@ -381,7 +386,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
 					amount:                32000000000,
 					signature:             signature,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositMessageRoot:    depositMessageRoot,
 				},
 			},
@@ -397,14 +402,14 @@ func TestOutputLaunchpad(t *testing.T) {
 					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
 					amount:                32000000000,
 					signature:             signature,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositDataRoot:       depositDataRoot,
 				},
 			},
 			err: "deposit message root required",
 		},
 		{
-			name: "Single",
+			name: "SinglePyrmont",
 			dataOut: []*dataOut{
 				{
 					format:                "launchpad",
@@ -413,13 +418,30 @@ func TestOutputLaunchpad(t *testing.T) {
 					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
 					amount:                32000000000,
 					signature:             signature,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositDataRoot:       depositDataRoot,
 					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"}]`,
 		},
+		{
+			name: "SinglePrater",
+			dataOut: []*dataOut{
+				{
+					format:                "launchpad",
+					account:               "interop/00000",
+					validatorPubKey:       validatorPubKey,
+					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
+					amount:                32000000000,
+					signature:             signature,
+					forkVersion:           forkVersionPrater,
+					depositDataRoot:       depositDataRoot,
+					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"}]`,
+		},
 		{
 			name: "Double",
 			dataOut: []*dataOut{
@@ -430,7 +452,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
 					amount:                32000000000,
 					signature:             signature,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositDataRoot:       depositDataRoot,
 					depositMessageRoot:    depositMessageRoot,
 				},
@@ -441,7 +463,7 @@ func TestOutputLaunchpad(t *testing.T) {
 					withdrawalCredentials: testutil.HexToBytes("0x00ec7ef7780c9d151597924036262dd28dc60e1228f4da6fecf9d402cb3f3594"),
 					amount:                32000000000,
 					signature:             signature2,
-					forkVersion:           forkVersion,
+					forkVersion:           forkVersionPyrmont,
 					depositDataRoot:       depositDataRoot2,
 					depositMessageRoot:    depositMessageRoot2,
 				},

cmd/validator/depositdata/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019-2021 Weald Technology Limited.
 // 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
@@ -15,12 +15,16 @@ package depositdata
 
 import (
 	"context"
+	"encoding/hex"
 	"fmt"
+	"strings"
 
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/wealdtech/ethdo/signing"
-	"github.com/wealdtech/ethdo/util"
+	ethdoutil "github.com/wealdtech/ethdo/util"
+	e2types "github.com/wealdtech/go-eth2-types/v2"
+	util "github.com/wealdtech/go-eth2-util"
 	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
 )
 
@@ -31,8 +35,13 @@ func process(data *dataIn) ([]*dataOut, error) {
 
 	results := make([]*dataOut, 0)
 
+	withdrawalCredentials, err := createWithdrawalCredentials(data)
+	if err != nil {
+		return nil, err
+	}
+
 	for _, validatorAccount := range data.validatorAccounts {
-		validatorPubKey, err := util.BestPublicKey(validatorAccount)
+		validatorPubKey, err := ethdoutil.BestPublicKey(validatorAccount)
 		if err != nil {
 			return nil, errors.Wrap(err, "validator account does not provide a public key")
 		}
@@ -41,7 +50,7 @@ func process(data *dataIn) ([]*dataOut, error) {
 		copy(pubKey[:], validatorPubKey.Marshal())
 		depositMessage := &spec.DepositMessage{
 			PublicKey:             pubKey,
-			WithdrawalCredentials: data.withdrawalCredentials,
+			WithdrawalCredentials: withdrawalCredentials,
 			Amount:                data.amount,
 		}
 		root, err := depositMessage.HashTreeRoot()
@@ -58,7 +67,7 @@ func process(data *dataIn) ([]*dataOut, error) {
 
 		depositData := &spec.DepositData{
 			PublicKey:             pubKey,
-			WithdrawalCredentials: data.withdrawalCredentials,
+			WithdrawalCredentials: withdrawalCredentials,
 			Amount:                data.amount,
 			Signature:             sig,
 		}
@@ -75,7 +84,7 @@ func process(data *dataIn) ([]*dataOut, error) {
 			format:                data.format,
 			account:               fmt.Sprintf("%s/%s", validatorWallet.Name(), validatorAccount.Name()),
 			validatorPubKey:       &pubKey,
-			withdrawalCredentials: data.withdrawalCredentials,
+			withdrawalCredentials: withdrawalCredentials,
 			amount:                data.amount,
 			signature:             &sig,
 			forkVersion:           data.forkVersion,
@@ -85,3 +94,80 @@ func process(data *dataIn) ([]*dataOut, error) {
 	}
 	return results, nil
 }
+
+// createWithdrawalCredentials creates withdrawal credentials given an account, public key or Ethereum 1 address.
+func createWithdrawalCredentials(data *dataIn) ([]byte, error) {
+	var withdrawalCredentials []byte
+
+	switch {
+	case data.withdrawalAccount != "":
+		ctx, cancel := context.WithTimeout(context.Background(), data.timeout)
+		defer cancel()
+		_, withdrawalAccount, err := ethdoutil.WalletAndAccountFromPath(ctx, data.withdrawalAccount)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to obtain withdrawal account")
+		}
+		pubKey, err := ethdoutil.BestPublicKey(withdrawalAccount)
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to obtain public key for withdrawal account")
+		}
+		withdrawalCredentials = util.SHA256(pubKey.Marshal())
+		// This is hard-coded, to allow deposit data to be generated without a connection to the beacon node.
+		withdrawalCredentials[0] = byte(0) // BLS_WITHDRAWAL_PREFIX
+	case data.withdrawalPubKey != "":
+		withdrawalPubKeyBytes, err := hex.DecodeString(strings.TrimPrefix(data.withdrawalPubKey, "0x"))
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to decode withdrawal public key")
+		}
+		if len(withdrawalPubKeyBytes) != 48 {
+			return nil, errors.New("withdrawal public key must be exactly 48 bytes in length")
+		}
+		pubKey, err := e2types.BLSPublicKeyFromBytes(withdrawalPubKeyBytes)
+		if err != nil {
+			return nil, errors.Wrap(err, "withdrawal public key is not valid")
+		}
+		withdrawalCredentials = util.SHA256(pubKey.Marshal())
+		// This is hard-coded, to allow deposit data to be generated without a connection to the beacon node.
+		withdrawalCredentials[0] = byte(0) // BLS_WITHDRAWAL_PREFIX
+	case data.withdrawalAddress != "":
+		withdrawalAddressBytes, err := hex.DecodeString(strings.TrimPrefix(data.withdrawalAddress, "0x"))
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to decode withdrawal address")
+		}
+		if len(withdrawalAddressBytes) != 20 {
+			return nil, errors.New("withdrawal address must be exactly 20 bytes in length")
+		}
+		// Ensure the address is properly checksummed.
+		checksummedAddress := addressBytesToEIP55(withdrawalAddressBytes)
+		if checksummedAddress != data.withdrawalAddress {
+			return nil, fmt.Errorf("withdrawal address checksum does not match (expected %s)", checksummedAddress)
+		}
+		withdrawalCredentials = make([]byte, 32)
+		copy(withdrawalCredentials[12:32], withdrawalAddressBytes)
+		// This is hard-coded, to allow deposit data to be generated without a connection to the beacon node.
+		withdrawalCredentials[0] = byte(1) // ETH1_ADDRESS_WITHDRAWAL_PREFIX
+	default:
+		return nil, errors.New("withdrawal account, public key or address is required")
+	}
+
+	return withdrawalCredentials, nil
+}
+
+// addressBytesToEIP55 converts a byte array in to an EIP-55 string format.
+func addressBytesToEIP55(address []byte) string {
+	bytes := []byte(fmt.Sprintf("%x", address))
+	hash := util.Keccak256(bytes)
+	for i := 0; i < len(bytes); i++ {
+		hashByte := hash[i/2]
+		if i%2 == 0 {
+			hashByte >>= 4
+		} else {
+			hashByte &= 0xf
+		}
+		if bytes[i] > '9' && hashByte > 7 {
+			bytes[i] -= 32
+		}
+	}
+
+	return fmt.Sprintf("0x%s", string(bytes))
+}

cmd/validator/depositdata/process_internal_test.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 eald Technology Trading
+// Copyright © 2019-2021 Weald Technology Limited.
 // 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
@@ -15,6 +15,8 @@ package depositdata
 
 import (
 	"context"
+	"encoding/hex"
+	"strings"
 	"testing"
 
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
@@ -49,6 +51,10 @@ func TestProcess(t *testing.T) {
 	)
 	require.NoError(t, err)
 
+	withdrawalAccount := "Test/Interop 0"
+	withdrawalPubKey := "0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c"
+	withdrawalAddress := "0x30C99930617B7b793beaB603ecEB08691005f2E5"
+
 	var validatorPubKey *spec.BLSPubKey
 	{
 		tmp := testutil.HexToPubKey("0xa99a76ed7796f7be22d5b7e85deeb7c5677e88e511e0b337618f8c4eb61349b4bf2d153f649f7b53359fe8b94a38e44c")
@@ -101,6 +107,22 @@ func TestProcess(t *testing.T) {
 		depositMessageRoot2 = &tmp
 	}
 
+	var depositDataRoot3 *spec.Root
+	{
+		tmp := testutil.HexToRoot("0x489500535b03dd9deffa0f00cb38d82346111856fb58a9541fe1f01a1a97429c")
+		depositDataRoot3 = &tmp
+	}
+	var depositMessageRoot3 *spec.Root
+	{
+		tmp := testutil.HexToRoot("0x7b8ee5694e4338cf2bfe5a4d2f46540f0ade85ebd30713673cf5783c4e925681")
+		depositMessageRoot3 = &tmp
+	}
+	var signature3 *spec.BLSSignature
+	{
+		tmp := testutil.HexToSignature("0xba0019d5c421f205d845782f52a87ab95cd489fbef2911f8a1f9cf7c14b4ce59eefa82641e770a4cb405534b7776d0f801b0a8b178c1b71b718c104e89f4e633da10a398c7919a00c403d58f3f4b827af8adb263b192e7a45b0ed1926dff5f66")
+		signature3 = &tmp
+	}
+
 	tests := []struct {
 		name   string
 		dataIn *dataIn
@@ -111,16 +133,119 @@ func TestProcess(t *testing.T) {
 			name: "Nil",
 			err:  "no data",
 		},
+		{
+			name: "WithdrawalDetailsMissing",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "withdrawal account, public key or address is required",
+		},
+		{
+			name: "WithdrawalAccountUnknown",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalAccount: "Unknown",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "failed to obtain withdrawal account: failed to open wallet for account: wallet not found",
+		},
+		{
+			name: "WithdrawalPubKeyInvalid",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalPubKey:  "invalid",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "failed to decode withdrawal public key: encoding/hex: invalid byte: U+0069 'i'",
+		},
+		{
+			name: "WithdrawalPubKeyWrongLength",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalPubKey:  "0xb89bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0bff",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "withdrawal public key must be exactly 48 bytes in length",
+		},
+		{
+			name: "WithdrawalPubKeyNotPubKey",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalPubKey:  "0x089bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0b",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "withdrawal public key is not valid: failed to deserialize public key: err blsPublicKeyDeserialize 089bebc699769726a318c8e9971bd3171297c61aea4a6578a7a4f94b547dcba5bac16a89108b6b6a1fe3695d1a874a0b",
+		},
+		{
+			name: "WithdrawalAddressInvalid",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalAddress: "invalid",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "failed to decode withdrawal address: encoding/hex: invalid byte: U+0069 'i'",
+		},
+		{
+			name: "WithdrawalAddressWrongLength",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalAddress: "0x30C99930617B7b793beaB603ecEB08691005f2",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "withdrawal address must be exactly 20 bytes in length",
+		},
+		{
+			name: "WithdrawalAddressIncorrectChecksum",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalAddress: "0x30c99930617b7b793beab603eceb08691005f2e5",
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			err: "withdrawal address checksum does not match (expected 0x30C99930617B7b793beaB603ecEB08691005f2E5)",
+		},
 		{
 			name: "Single",
 			dataIn: &dataIn{
-				format:                "raw",
-				passphrases:           []string{"pass"},
-				withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
-				amount:                32000000000,
-				validatorAccounts:     []e2wtypes.Account{interop0},
-				forkVersion:           forkVersion,
-				domain:                domain,
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalAccount: withdrawalAccount,
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
 			},
 			res: []*dataOut{
 				{
@@ -139,13 +264,13 @@ func TestProcess(t *testing.T) {
 		{
 			name: "Double",
 			dataIn: &dataIn{
-				format:                "raw",
-				passphrases:           []string{"pass"},
-				withdrawalCredentials: testutil.HexToBytes("0x00fad2a6bfb0e7f1f0f45460944fbd8dfa7f37da06a4d13b3983cc90bb46963b"),
-				amount:                32000000000,
-				validatorAccounts:     []e2wtypes.Account{interop0, interop1},
-				forkVersion:           forkVersion,
-				domain:                domain,
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalPubKey:  withdrawalPubKey,
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0, interop1},
+				forkVersion:       forkVersion,
+				domain:            domain,
 			},
 			res: []*dataOut{
 				{
@@ -172,6 +297,31 @@ func TestProcess(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "WithdrawalAddress",
+			dataIn: &dataIn{
+				format:            "raw",
+				passphrases:       []string{"pass"},
+				withdrawalAddress: withdrawalAddress,
+				amount:            32000000000,
+				validatorAccounts: []e2wtypes.Account{interop0},
+				forkVersion:       forkVersion,
+				domain:            domain,
+			},
+			res: []*dataOut{
+				{
+					format:                "raw",
+					account:               "Test/Interop 0",
+					validatorPubKey:       validatorPubKey,
+					amount:                32000000000,
+					withdrawalCredentials: testutil.HexToBytes("0x01000000000000000000000030C99930617B7b793beaB603ecEB08691005f2E5"),
+					signature:             signature3,
+					forkVersion:           forkVersion,
+					depositDataRoot:       depositDataRoot3,
+					depositMessageRoot:    depositMessageRoot3,
+				},
+			},
+		},
 	}
 
 	for _, test := range tests {
@@ -186,3 +336,18 @@ func TestProcess(t *testing.T) {
 		})
 	}
 }
+
+func TestAddressBytesToEIP55(t *testing.T) {
+	tests := []string{
+		"0x5aAeb6053F3E94C9b9A09f33669435E7Ef1BeAed",
+		"0xfB6916095ca1df60bB79Ce92cE3Ea74c37c5d359",
+		"0xdbF03B407c01E7cD3CBea99509d93f8DDDC8C6FB",
+		"0xD1220A0cf47c7B9Be7A2E6BA89F429762e7b9aDb",
+	}
+
+	for _, test := range tests {
+		bytes, err := hex.DecodeString(strings.TrimPrefix(test, "0x"))
+		require.NoError(t, err)
+		require.Equal(t, addressBytesToEIP55(bytes), test)
+	}
+}

cmd/validator/duties/process.go

@@ -1,4 +1,4 @@
-// Copyright © 2019, 2020 Weald Technology Trading
+// Copyright © 2019 - 2022 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
@@ -15,10 +15,6 @@ package validatorduties
 
 import (
 	"context"
-	"encoding/hex"
-	"fmt"
-	"strconv"
-	"strings"
 	"time"
 
 	eth2client "github.com/attestantio/go-eth2-client"
@@ -26,7 +22,6 @@ import (
 	spec "github.com/attestantio/go-eth2-client/spec/phase0"
 	"github.com/pkg/errors"
 	"github.com/wealdtech/ethdo/util"
-	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
 )
 
 func process(ctx context.Context, data *dataIn) (*dataOut, error) {
@@ -46,7 +41,7 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 		verbose: data.verbose,
 	}
 
-	validatorIndex, err := validatorIndex(ctx, eth2Client, data)
+	validatorIndex, err := util.ValidatorIndex(ctx, eth2Client, data.account, data.pubKey, data.index)
 	if err != nil {
 		return nil, errors.Wrap(err, "failed to obtain validator index")
 	}
@@ -58,17 +53,20 @@ func process(ctx context.Context, data *dataIn) (*dataOut, error) {
 	}
 	thisEpochAttesterDuty, err := attesterDuty(ctx, eth2Client, validatorIndex, thisEpoch)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to obtain this epoch duty for validator")
+		return nil, errors.Wrap(err, "failed to obtain this epoch attester duty for validator")
 	}
 	results.thisEpochAttesterDuty = thisEpochAttesterDuty
 
 	thisEpochProposerDuties, err := proposerDuties(ctx, eth2Client, validatorIndex, thisEpoch)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to obtain this epoch proposer duties for validator")
+	}
 	results.thisEpochProposerDuties = thisEpochProposerDuties
 
 	nextEpoch := thisEpoch + 1
 	nextEpochAttesterDuty, err := attesterDuty(ctx, eth2Client, validatorIndex, nextEpoch)
 	if err != nil {
-		return nil, errors.Wrap(err, "failed to obtain next epoch duty for validator")
+		return nil, errors.Wrap(err, "failed to obtain next epoch attester duty for validator")
 	}
 	results.nextEpochAttesterDuty = nextEpochAttesterDuty
 
@@ -129,54 +127,3 @@ func currentEpoch(ctx context.Context, eth2Client eth2client.Service) (spec.Epoc
 	}
 	return spec.Epoch(uint64(time.Since(genesis.GenesisTime).Seconds()) / (uint64(slotDuration.Seconds()) * slotsPerEpoch)), nil
 }
-
-// validatorIndex obtains the index of a validator
-func validatorIndex(ctx context.Context, eth2Client eth2client.Service, data *dataIn) (spec.ValidatorIndex, error) {
-	switch {
-	case data.account != "":
-		ctx, cancel := context.WithTimeout(context.Background(), data.timeout)
-		defer cancel()
-		_, account, err := util.WalletAndAccountFromPath(ctx, data.account)
-		if err != nil {
-			return 0, errors.Wrap(err, "failed to obtain account")
-		}
-		return accountToIndex(ctx, account, eth2Client)
-	case data.pubKey != "":
-		pubKeyBytes, err := hex.DecodeString(strings.TrimPrefix(data.pubKey, "0x"))
-		if err != nil {
-			return 0, errors.Wrap(err, fmt.Sprintf("failed to decode public key %s", data.pubKey))
-		}
-		account, err := util.NewScratchAccount(nil, pubKeyBytes)
-		if err != nil {
-			return 0, errors.Wrap(err, fmt.Sprintf("invalid public key %s", data.pubKey))
-		}
-		return accountToIndex(ctx, account, eth2Client)
-	case data.index != "":
-		val, err := strconv.ParseUint(data.index, 10, 64)
-		if err != nil {
-			return 0, err
-		}
-		return spec.ValidatorIndex(val), nil
-	default:
-		return 0, errors.New("no validator")
-	}
-}
-
-func accountToIndex(ctx context.Context, account e2wtypes.Account, eth2Client eth2client.Service) (spec.ValidatorIndex, error) {
-	pubKey, err := util.BestPublicKey(account)
-	if err != nil {
-		return 0, err
-	}
-
-	pubKeys := make([]spec.BLSPubKey, 1)
-	copy(pubKeys[0][:], pubKey.Marshal())
-	validators, err := eth2Client.(eth2client.ValidatorsProvider).ValidatorsByPubKey(ctx, "head", pubKeys)
-	if err != nil {
-		return 0, err
-	}
-
-	for index := range validators {
-		return index, nil
-	}
-	return 0, errors.New("validator not found")
-}

cmd/validator/expectation/command.go

@@ -0,0 +1,73 @@
+// Copyright © 2021 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 validatorexpectation
+
+import (
+	"context"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+)
+
+type command struct {
+	quiet   bool
+	verbose bool
+	debug   bool
+
+	// Beacon node connection.
+	timeout                  time.Duration
+	connection               string
+	allowInsecureConnections bool
+
+	// Input.
+	validators int64
+
+	// Data access.
+	eth2Client         eth2client.Service
+	validatorsProvider eth2client.ValidatorsProvider
+	activeValidators   int
+
+	// Output.
+	timeBetweenProposals      time.Duration
+	timeBetweenSyncCommittees time.Duration
+}
+
+func newCommand(ctx context.Context) (*command, error) {
+	c := &command{
+		quiet:   viper.GetBool("quiet"),
+		verbose: viper.GetBool("verbose"),
+		debug:   viper.GetBool("debug"),
+	}
+
+	// Timeout.
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	c.timeout = viper.GetDuration("timeout")
+
+	if viper.GetString("connection") == "" {
+		return nil, errors.New("connection is required")
+	}
+	c.connection = viper.GetString("connection")
+	c.allowInsecureConnections = viper.GetBool("allow-insecure-connections")
+
+	c.validators = viper.GetInt64("validators")
+	if c.validators < 1 {
+		return nil, errors.New("validators must be at least 1")
+	}
+
+	return c, nil
+}

cmd/validator/expectation/command_internal_test.go

@@ -0,0 +1,82 @@
+// Copyright © 2021 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 validatorexpectation
+
+import (
+	"context"
+	"os"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInput(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: "TimeoutMissing",
+			vars: map[string]interface{}{},
+			err:  "timeout is required",
+		},
+		{
+			name: "ConnectionMissing",
+			vars: map[string]interface{}{
+				"validators": "1",
+				"timeout":    "5s",
+			},
+			err: "connection is required",
+		},
+		{
+			name: "ValidatorsZero",
+			vars: map[string]interface{}{
+				"timeout":    "5s",
+				"validators": "0",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+			err: "validators must be at least 1",
+		},
+		{
+			name: "Good",
+			vars: map[string]interface{}{
+				"validators": "1",
+				"timeout":    "5s",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			_, err := newCommand(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+			}
+		})
+	}
+}

cmd/validator/expectation/output.go

@@ -0,0 +1,39 @@
+// Copyright © 2021 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 validatorexpectation
+
+import (
+	"context"
+	"strings"
+
+	"github.com/hako/durafmt"
+)
+
+func (c *command) output(ctx context.Context) (string, error) {
+	if c.quiet {
+		return "", nil
+	}
+
+	builder := strings.Builder{}
+
+	builder.WriteString("Expected time between block proposals: ")
+	builder.WriteString(durafmt.Parse(c.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("\n")
+
+	return builder.String(), nil
+}

cmd/validator/expectation/process.go

@@ -0,0 +1,161 @@
+// Copyright © 2021 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 validatorexpectation
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	eth2client "github.com/attestantio/go-eth2-client"
+	"github.com/pkg/errors"
+	standardchaintime "github.com/wealdtech/ethdo/services/chaintime/standard"
+	"github.com/wealdtech/ethdo/util"
+)
+
+func (c *command) process(ctx context.Context) error {
+	// Obtain information we need to process.
+	if err := c.setup(ctx); err != nil {
+		return err
+	}
+
+	if c.debug {
+		fmt.Printf("Active validators: %d\n", c.activeValidators)
+	}
+
+	if err := c.calculateProposalChance(ctx); err != nil {
+		return err
+	}
+
+	return c.calculateSyncCommitteeChance(ctx)
+}
+
+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)
+	if err != nil {
+		return err
+	}
+
+	tmp, exists := spec["SECONDS_PER_SLOT"]
+	if !exists {
+		return errors.New("spec missing SECONDS_PER_SLOT")
+	}
+	slotDuration, isType := tmp.(time.Duration)
+	if !isType {
+		return errors.New("SECONDS_PER_SLOT of incorrect type")
+	}
+
+	c.timeBetweenProposals = slotDuration * time.Duration(c.activeValidators) / time.Duration(c.validators)
+
+	return nil
+}
+
+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)
+	if err != nil {
+		return err
+	}
+
+	tmp, exists := spec["SECONDS_PER_SLOT"]
+	if !exists {
+		return errors.New("spec missing SECONDS_PER_SLOT")
+	}
+	slotDuration, isType := tmp.(time.Duration)
+	if !isType {
+		return errors.New("SECONDS_PER_SLOT of incorrect type")
+	}
+
+	tmp, exists = spec["SYNC_COMMITTEE_SIZE"]
+	if !exists {
+		return errors.New("spec missing SYNC_COMMITTEE_SIZE")
+	}
+	syncCommitteeSize, isType := tmp.(uint64)
+	if !isType {
+		return errors.New("SYNC_COMMITTEE_SIZE of incorrect type")
+	}
+
+	tmp, exists = spec["SLOTS_PER_EPOCH"]
+	if !exists {
+		return errors.New("spec missing SLOTS_PER_EPOCH")
+	}
+	slotsPerEpoch, isType := tmp.(uint64)
+	if !isType {
+		return errors.New("SLOTS_PER_EPOCH of incorrect type")
+	}
+
+	tmp, exists = spec["EPOCHS_PER_SYNC_COMMITTEE_PERIOD"]
+	if !exists {
+		return errors.New("spec missing EPOCHS_PER_SYNC_COMMITTEE_PERIOD")
+	}
+	epochsPerPeriod, isType := tmp.(uint64)
+	if !isType {
+		return errors.New("EPOCHS_PER_SYNC_COMMITTEE_PERIOD of incorrect type")
+	}
+
+	periodsBetweenSyncCommittees := uint64(c.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)
+
+	return nil
+}
+
+func (c *command) setup(ctx context.Context) error {
+	var err error
+
+	// Connect to the client.
+	c.eth2Client, err = util.ConnectToBeaconNode(ctx, c.connection, c.timeout, c.allowInsecureConnections)
+	if err != nil {
+		return errors.Wrap(err, "failed to connect to beacon node")
+	}
+
+	chainTime, err := standardchaintime.New(ctx,
+		standardchaintime.WithSpecProvider(c.eth2Client.(eth2client.SpecProvider)),
+		standardchaintime.WithForkScheduleProvider(c.eth2Client.(eth2client.ForkScheduleProvider)),
+		standardchaintime.WithGenesisTimeProvider(c.eth2Client.(eth2client.GenesisTimeProvider)),
+	)
+	if err != nil {
+		return errors.Wrap(err, "failed to set up chaintime service")
+	}
+
+	// Obtain the number of active validators.
+	var isProvider bool
+	c.validatorsProvider, isProvider = c.eth2Client.(eth2client.ValidatorsProvider)
+	if !isProvider {
+		return errors.New("connection does not provide validator information")
+	}
+
+	validators, err := c.validatorsProvider.Validators(ctx, "head", nil)
+	if err != nil {
+		return errors.Wrap(err, "failed to obtain validators")
+	}
+
+	currentEpoch := chainTime.CurrentEpoch()
+	for _, validator := range validators {
+		if validator.Validator.ActivationEpoch <= currentEpoch &&
+			validator.Validator.ExitEpoch > currentEpoch {
+			c.activeValidators++
+		}
+	}
+
+	return nil
+}

cmd/validator/expectation/process_internal_test.go

@@ -0,0 +1,63 @@
+// Copyright © 2021 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 validatorexpectation
+
+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: "InvalidData",
+			vars: map[string]interface{}{
+				"timeout":    "60s",
+				"validators": "1",
+				"data":       "[[",
+				"connection": os.Getenv("ETHDO_TEST_CONNECTION"),
+			},
+		},
+	}
+
+	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/validator/expectation/run.go

@@ -0,0 +1,50 @@
+// Copyright © 2021 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 validatorexpectation
+
+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/validator/keycheck/input.go

@@ -0,0 +1,55 @@
+// Copyright © 2021 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 validatorkeycheck
+
+import (
+	"context"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+)
+
+type dataIn struct {
+	// System.
+	quiet   bool
+	verbose bool
+	debug   bool
+	// Withdrawal credentials.
+	withdrawalCredentials string
+	// Operation.
+	mnemonic string
+	privKey  string
+}
+
+func input(ctx context.Context) (*dataIn, error) {
+	data := &dataIn{}
+
+	data.quiet = viper.GetBool("quiet")
+	data.verbose = viper.GetBool("verbose")
+	data.debug = viper.GetBool("debug")
+
+	// Withdrawal credentials.
+	data.withdrawalCredentials = viper.GetString("withdrawal-credentials")
+	if data.withdrawalCredentials == "" {
+		return nil, errors.New("withdrawal credentials are required")
+	}
+
+	data.mnemonic = viper.GetString("mnemonic")
+	data.privKey = viper.GetString("privkey")
+	if data.mnemonic == "" && data.privKey == "" {
+		return nil, errors.New("mnemonic or privkey is required")
+	}
+
+	return data, nil
+}

cmd/validator/keycheck/input_internal_test.go

@@ -0,0 +1,71 @@
+// Copyright © 2021 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 validatorkeycheck
+
+import (
+	"context"
+	"testing"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+)
+
+func TestInput(t *testing.T) {
+	tests := []struct {
+		name string
+		vars map[string]interface{}
+		res  *dataIn
+		err  string
+	}{
+		{
+			name: "WithdrawalCredentialsMissing",
+			vars: map[string]interface{}{},
+			err:  "withdrawal credentials are required",
+		},
+		{
+			name: "MnemonicAndPrivateKeyMissing",
+			vars: map[string]interface{}{
+				"withdrawal-credentials": "0x007e28dcf9029e8d92ca4b5d01c66c934e7f3110606f34ae3052cbf67bd3fc02",
+			},
+			err: "mnemonic or privkey is required",
+		},
+		{
+			name: "GoodWithMnemonic",
+			vars: map[string]interface{}{
+				"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",
+			},
+			res: &dataIn{
+				withdrawalCredentials: "0x007e28dcf9029e8d92ca4b5d01c66c934e7f3110606f34ae3052cbf67bd3fc02",
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			res, err := input(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, test.res.withdrawalCredentials, res.withdrawalCredentials)
+			}
+		})
+	}
+}

cmd/validator/keycheck/output.go

@@ -0,0 +1,52 @@
+// Copyright © 2021 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 validatorkeycheck
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/pkg/errors"
+)
+
+type dataOut struct {
+	debug   bool
+	quiet   bool
+	verbose bool
+	match   bool
+	path    string
+}
+
+func output(ctx context.Context, data *dataOut) (string, int, error) {
+	if data == nil {
+		return "", 1, errors.New("no data")
+	}
+
+	if data.quiet {
+		if !data.match {
+			os.Exit(1)
+		}
+		return "", 1, nil
+	}
+
+	if data.match {
+		if data.path == "" {
+			return "Withdrawal credentials confirmed", 0, nil
+		}
+		return fmt.Sprintf("Withdrawal credentials confirmed at path %s", data.path), 0, nil
+	}
+
+	return "Could not confirm withdrawal credentials with given information", 1, nil
+}

cmd/validator/keycheck/output_internal_test.go

@@ -0,0 +1,81 @@
+// Copyright © 2021 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 validatorkeycheck
+
+import (
+	"context"
+	"strings"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestOutput(t *testing.T) {
+	tests := []struct {
+		name     string
+		dataOut  *dataOut
+		exitCode int
+		expected []string
+		err      string
+	}{
+		{
+			name: "Nil",
+			err:  "no data",
+		},
+		{
+			name: "Not found",
+			dataOut: &dataOut{
+				match: false,
+			},
+			exitCode: 1,
+			expected: []string{
+				"Could not confirm withdrawal credentials with given information",
+			},
+		},
+		{
+			name: "Found",
+			dataOut: &dataOut{
+				match: true,
+			},
+			expected: []string{
+				"Withdrawal credentials confirmed",
+			},
+		},
+		{
+			name: "FoundWithPath",
+			dataOut: &dataOut{
+				match: true,
+				path:  "m/12381/3600/10/0",
+			},
+			expected: []string{
+				"Withdrawal credentials confirmed at path m/12381/3600/10/0",
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			res, exitCode, err := output(context.Background(), test.dataOut)
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, test.exitCode, exitCode)
+				for _, expected := range test.expected {
+					require.True(t, strings.Contains(res, expected))
+				}
+			}
+		})
+	}
+}

cmd/validator/keycheck/process.go

@@ -0,0 +1,123 @@
+// Copyright © 2021 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 validatorkeycheck
+
+import (
+	"bytes"
+	"context"
+	"encoding/hex"
+	"fmt"
+	"strings"
+
+	"github.com/pkg/errors"
+	"github.com/tyler-smith/go-bip39"
+	e2types "github.com/wealdtech/go-eth2-types/v2"
+	util "github.com/wealdtech/go-eth2-util"
+	"golang.org/x/text/unicode/norm"
+)
+
+func process(ctx context.Context, data *dataIn) (*dataOut, error) {
+	if data == nil {
+		return nil, errors.New("no data")
+	}
+
+	validatorWithdrawalCredentials, err := hex.DecodeString(strings.TrimPrefix(data.withdrawalCredentials, "0x"))
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to parse withdrawal credentials")
+	}
+
+	match := false
+	path := ""
+	if data.privKey != "" {
+		// Single private key to check.
+		keyBytes, err := hex.DecodeString(strings.TrimPrefix(data.privKey, "0x"))
+		if err != nil {
+			return nil, err
+		}
+		key, err := e2types.BLSPrivateKeyFromBytes(keyBytes)
+		if err != nil {
+			return nil, err
+		}
+
+		match, err = checkPrivKey(ctx, data.debug, validatorWithdrawalCredentials, key)
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		// Mnemonic to check.
+		match, path, err = checkMnemonic(ctx, data.debug, validatorWithdrawalCredentials, data.mnemonic)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	results := &dataOut{
+		debug:   data.debug,
+		quiet:   data.quiet,
+		verbose: data.verbose,
+		match:   match,
+		path:    path,
+	}
+
+	return results, nil
+}
+
+func checkPrivKey(ctx context.Context, debug bool, validatorWithdrawalCredentials []byte, key *e2types.BLSPrivateKey) (bool, error) {
+	pubKey := key.PublicKey()
+
+	withdrawalCredentials := util.SHA256(pubKey.Marshal())
+	withdrawalCredentials[0] = byte(0) // BLS_WITHDRAWAL_PREFIX
+
+	return bytes.Equal(withdrawalCredentials, validatorWithdrawalCredentials), nil
+}
+
+func checkMnemonic(ctx context.Context, debug bool, validatorWithdrawalCredentials []byte, mnemonic string) (bool, string, error) {
+	// If there are more than 24 words we treat the additional characters as the passphrase.
+	mnemonicParts := strings.Split(mnemonic, " ")
+	mnemonicPassphrase := ""
+	if len(mnemonicParts) > 24 {
+		mnemonic = strings.Join(mnemonicParts[:24], " ")
+		mnemonicPassphrase = strings.Join(mnemonicParts[24:], " ")
+	}
+	// Normalise the input.
+	mnemonic = string(norm.NFKD.Bytes([]byte(mnemonic)))
+	mnemonicPassphrase = string(norm.NFKD.Bytes([]byte(mnemonicPassphrase)))
+
+	if !bip39.IsMnemonicValid(mnemonic) {
+		return false, "", errors.New("mnemonic is invalid")
+	}
+
+	// Create seed from mnemonic and passphrase.
+	seed := bip39.NewSeed(mnemonic, mnemonicPassphrase)
+	// Check first 1024 indices.
+	for i := 0; i < 1024; i++ {
+		path := fmt.Sprintf("m/12381/3600/%d/0", i)
+		if debug {
+			fmt.Printf("Checking path %s\n", path)
+		}
+		key, err := util.PrivateKeyFromSeedAndPath(seed, path)
+		if err != nil {
+			return false, "", errors.Wrap(err, "failed to generate key")
+		}
+		match, err := checkPrivKey(ctx, debug, validatorWithdrawalCredentials, key)
+		if err != nil {
+			return false, "", errors.Wrap(err, "failed to match key")
+		}
+		if match {
+			return true, path, nil
+		}
+	}
+
+	return false, "", nil
+}

cmd/validator/keycheck/run.go

@@ -0,0 +1,51 @@
+// Copyright © 2021 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 validatorkeycheck
+
+import (
+	"context"
+	"fmt"
+	"os"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/cobra"
+)
+
+// Run runs the wallet create data command.
+func Run(cmd *cobra.Command) (string, error) {
+	ctx := context.Background()
+	dataIn, err := input(ctx)
+	if err != nil {
+		return "", errors.Wrap(err, "failed to obtain input")
+	}
+
+	// Further errors do not need a usage report.
+	cmd.SilenceUsage = true
+
+	dataOut, err := process(ctx, dataIn)
+	if err != nil {
+		return "", err
+	}
+
+	results, exitCode, err := output(ctx, dataOut)
+	if err != nil {
+		return "", err
+	}
+	if exitCode != 0 {
+		fmt.Println(results)
+		os.Exit(exitCode)
+	}
+
+	return results, nil
+}

cmd/validatordepositdata.go

@@ -49,9 +49,10 @@ In quiet mode this will return 0 if the the data can be generated correctly, oth
 func init() {
 	validatorCmd.AddCommand(validatorDepositDataCmd)
 	validatorFlags(validatorDepositDataCmd)
-	validatorDepositDataCmd.Flags().String("validatoraccount", "", "Account of the account carrying out the validation")
-	validatorDepositDataCmd.Flags().String("withdrawalaccount", "", "Account of the account to which the validator funds will be withdrawn")
+	validatorDepositDataCmd.Flags().String("validatoraccount", "", "Account carrying out the validation")
+	validatorDepositDataCmd.Flags().String("withdrawalaccount", "", "Account to which the validator funds will be withdrawn")
 	validatorDepositDataCmd.Flags().String("withdrawalpubkey", "", "Public key of the account to which the validator funds will be withdrawn")
+	validatorDepositDataCmd.Flags().String("withdrawaladdress", "", "Ethereum 1 address of the account to which the validator funds will be withdrawn")
 	validatorDepositDataCmd.Flags().String("depositvalue", "", "Value of the amount to be deposited")
 	validatorDepositDataCmd.Flags().Bool("raw", false, "Print raw deposit data transaction data")
 	validatorDepositDataCmd.Flags().String("forkversion", "", "Use a hard-coded fork version (default is to fetch it from the node)")
@@ -68,6 +69,9 @@ func validatorDepositdataBindings() {
 	if err := viper.BindPFlag("withdrawalpubkey", validatorDepositDataCmd.Flags().Lookup("withdrawalpubkey")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("withdrawaladdress", validatorDepositDataCmd.Flags().Lookup("withdrawaladdress")); err != nil {
+		panic(err)
+	}
 	if err := viper.BindPFlag("depositvalue", validatorDepositDataCmd.Flags().Lookup("depositvalue")); err != nil {
 		panic(err)
 	}

cmd/validatorduties.go

@@ -39,7 +39,7 @@ In quiet mode this will return 0 if the the duties have been obtained, otherwise
 		if viper.GetBool("quiet") {
 			return nil
 		}
-		fmt.Printf(res)
+		fmt.Print(res)
 		return nil
 	},
 }

cmd/validatorexpectation.go

@@ -0,0 +1,55 @@
+// Copyright © 2021 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"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"github.com/spf13/viper"
+	validatorexpectation "github.com/wealdtech/ethdo/cmd/validator/expectation"
+)
+
+var validatorExpectationCmd = &cobra.Command{
+	Use:   "expectation",
+	Short: "Calculate expectation for individual validators",
+	Long: `Calculate expectation for individual validators.  For example:
+
+    ethdo validator expectation`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := validatorexpectation.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if viper.GetBool("quiet") {
+			return nil
+		}
+		res = strings.TrimRight(res, "\n")
+		fmt.Println(res)
+		return nil
+	},
+}
+
+func init() {
+	validatorCmd.AddCommand(validatorExpectationCmd)
+	validatorFlags(validatorExpectationCmd)
+	validatorExpectationCmd.Flags().Int64("validators", 1, "Number of validators")
+}
+
+func validatorExpectationBindings() {
+	if err := viper.BindPFlag("validators", validatorExpectationCmd.Flags().Lookup("validators")); err != nil {
+		panic(err)
+	}
+}

cmd/validatorinfo.go

@@ -1,4 +1,4 @@
-// Copyright © 2020 Weald Technology Trading
+// Copyright © 2020, 2021 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
@@ -54,7 +54,7 @@ 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")
 
-		account, err := validatorInfoAccount()
+		account, err := validatorInfoAccount(ctx, eth2Client)
 		errCheck(err, "Failed to obtain validator account")
 
 		pubKeys := make([]spec.BLSPubKey, 1)
@@ -99,6 +99,12 @@ In quiet mode this will return 0 if the validator information can be obtained, o
 			fmt.Printf("Public key: %#x\n", validator.Validator.PublicKey)
 		}
 		fmt.Printf("Status: %v\n", validator.Status)
+		switch validator.Status {
+		case api.ValidatorStateActiveExiting, api.ValidatorStateActiveSlashed:
+			fmt.Printf("Exit epoch: %d\n", validator.Validator.ExitEpoch)
+		case api.ValidatorStateExitedUnslashed, api.ValidatorStateExitedSlashed:
+			fmt.Printf("Withdrawable epoch: %d\n", validator.Validator.WithdrawableEpoch)
+		}
 		fmt.Printf("Balance: %s\n", string2eth.GWeiToString(uint64(validator.Balance), true))
 		if validator.Status.IsActive() {
 			fmt.Printf("Effective balance: %s\n", string2eth.GWeiToString(uint64(validator.Validator.EffectiveBalance), true))
@@ -107,31 +113,12 @@ In quiet mode this will return 0 if the validator information can be obtained, o
 			fmt.Printf("Withdrawal credentials: %#x\n", validator.Validator.WithdrawalCredentials)
 		}
 
-		//		transition := time.Unix(int64(validatorInfo.TransitionTimestamp), 0)
-		//		transitionPassed := int64(validatorInfo.TransitionTimestamp) <= time.Now().Unix()
-		//		switch validatorInfo.Status {
-		//		case ethpb.ValidatorStatus_DEPOSITED:
-		//			if validatorInfo.TransitionTimestamp != 0 {
-		//				fmt.Printf("Inclusion in chain: %s\n", transition)
-		//			}
-		//		case ethpb.ValidatorStatus_PENDING:
-		//			fmt.Printf("Activation: %s\n", transition)
-		//		case ethpb.ValidatorStatus_EXITING, ethpb.ValidatorStatus_SLASHING:
-		//			fmt.Printf("Attesting finishes: %s\n", transition)
-		//		case ethpb.ValidatorStatus_EXITED:
-		//			if transitionPassed {
-		//				fmt.Printf("Funds withdrawable: Now\n")
-		//			} else {
-		//				fmt.Printf("Funds withdrawable: %s\n", transition)
-		//			}
-		//		}
-
 		os.Exit(_exitSuccess)
 	},
 }
 
 // validatorInfoAccount obtains the account for the validator info command.
-func validatorInfoAccount() (e2wtypes.Account, error) {
+func validatorInfoAccount(ctx context.Context, eth2Client eth2client.Service) (e2wtypes.Account, error) {
 	var account e2wtypes.Account
 	var err error
 	switch {
@@ -151,6 +138,27 @@ func validatorInfoAccount() (e2wtypes.Account, error) {
 		if err != nil {
 			return nil, errors.Wrap(err, fmt.Sprintf("invalid public key %s", viper.GetString("pubkey")))
 		}
+	case viper.GetInt64("index") != -1:
+		validatorsProvider, isValidatorsProvider := eth2Client.(eth2client.ValidatorsProvider)
+		if !isValidatorsProvider {
+			return nil, errors.New("client does not provide validator information")
+		}
+		index := spec.ValidatorIndex(viper.GetInt64("index"))
+		validators, err := validatorsProvider.Validators(ctx, "head", []spec.ValidatorIndex{
+			index,
+		})
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to obtain validator information.")
+		}
+		if len(validators) == 0 {
+			return nil, errors.New("unknown validator index")
+		}
+		pubKeyBytes := make([]byte, 48)
+		copy(pubKeyBytes, validators[index].Validator.PublicKey[:])
+		account, err = util.NewScratchAccount(nil, pubKeyBytes)
+		if err != nil {
+			return nil, errors.Wrap(err, fmt.Sprintf("invalid public key %s", viper.GetString("pubkey")))
+		}
 	default:
 		return nil, errors.New("neither account nor public key supplied")
 	}
@@ -212,6 +220,7 @@ func graphData(network string, validatorPubKey []byte) (uint64, spec.Gwei, error
 func init() {
 	validatorCmd.AddCommand(validatorInfoCmd)
 	validatorInfoCmd.Flags().String("pubkey", "", "Public key for which to obtain status")
+	validatorInfoCmd.Flags().Int64("index", -1, "Index for which to obtain status")
 	validatorFlags(validatorInfoCmd)
 }
 
@@ -219,4 +228,7 @@ func validatorInfoBindings() {
 	if err := viper.BindPFlag("pubkey", validatorInfoCmd.Flags().Lookup("pubkey")); err != nil {
 		panic(err)
 	}
+	if err := viper.BindPFlag("index", validatorInfoCmd.Flags().Lookup("index")); err != nil {
+		panic(err)
+	}
 }

cmd/validatorkeycheck.go

@@ -0,0 +1,67 @@
+// Copyright © 2021 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"
+	validatorkeycheck "github.com/wealdtech/ethdo/cmd/validator/keycheck"
+)
+
+var validatorKeycheckCmd = &cobra.Command{
+	Use:   "keycheck",
+	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
+
+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.
+
+In quiet mode this will return 0 if the withdrawal credentials match the key, otherwise 1.`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		res, err := validatorkeycheck.Run(cmd)
+		if err != nil {
+			return err
+		}
+		if viper.GetBool("quiet") {
+			return nil
+		}
+		if res != "" {
+			fmt.Println(res)
+		}
+		return nil
+	},
+}
+
+func init() {
+	validatorCmd.AddCommand(validatorKeycheckCmd)
+	validatorFlags(validatorKeycheckCmd)
+	validatorKeycheckCmd.Flags().String("withdrawal-credentials", "", "Withdrawal credentials to check (can run offline)")
+	validatorKeycheckCmd.Flags().String("mnemonic", "", "Mnemonic from which to generate withdrawal credentials")
+	validatorKeycheckCmd.Flags().String("privkey", "", "Private key from which to generate withdrawal credentials")
+}
+
+func validatorKeycheckBindings() {
+	if err := viper.BindPFlag("withdrawal-credentials", validatorKeycheckCmd.Flags().Lookup("withdrawal-credentials")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("mnemonic", validatorKeycheckCmd.Flags().Lookup("mnemonic")); err != nil {
+		panic(err)
+	}
+	if err := viper.BindPFlag("privkey", validatorKeycheckCmd.Flags().Lookup("privkey")); err != nil {
+		panic(err)
+	}
+}

cmd/version.go

@@ -1,4 +1,4 @@
-// Copyright © 2019 - 2021 Weald Technology Trading
+// Copyright © 2019 - 2022 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
@@ -23,8 +23,8 @@ import (
 )
 
 // ReleaseVersion is the release version of the codebase.
-// Usually overrideen by tag names when building binaries.
-var ReleaseVersion = "local build (latest release 1.7.5)"
+// Usually overridden by tag names when building binaries.
+var ReleaseVersion = "local build (latest release 1.18.0)"
 
 // versionCmd represents the version command
 var versionCmd = &cobra.Command{

cmd/wallet/sharedexport/input.go

@@ -0,0 +1,83 @@
+// Copyright © 2021 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 walletsharedexport
+
+import (
+	"context"
+	"time"
+
+	"github.com/pkg/errors"
+	"github.com/spf13/viper"
+	"github.com/wealdtech/ethdo/util"
+	e2wtypes "github.com/wealdtech/go-eth2-wallet-types/v2"
+)
+
+type dataIn struct {
+	// System.
+	timeout      time.Duration
+	verbose      bool
+	debug        bool
+	wallet       e2wtypes.Wallet
+	file         string
+	participants uint32
+	threshold    uint32
+}
+
+func input(ctx context.Context) (*dataIn, error) {
+	var err error
+	data := &dataIn{}
+
+	if viper.GetString("remote") != "" {
+		return nil, errors.New("wallet export not available for remote wallets")
+	}
+
+	if viper.GetDuration("timeout") == 0 {
+		return nil, errors.New("timeout is required")
+	}
+	data.timeout = viper.GetDuration("timeout")
+	// Quiet is not allowed.
+	if viper.GetBool("quiet") {
+		return nil, errors.New("quiet not allowed")
+	}
+	data.verbose = viper.GetBool("verbose")
+	data.debug = viper.GetBool("debug")
+
+	// Wallet.
+	wallet, err := util.WalletFromInput(ctx)
+	if err != nil {
+		return nil, errors.Wrap(err, "failed to access wallet")
+	}
+	data.wallet = wallet
+
+	// File.
+	data.file = viper.GetString("file")
+	if data.file == "" {
+		return nil, errors.New("file is required")
+	}
+
+	// Participants
+	data.participants = viper.GetUint32("participants")
+	if data.participants == 0 {
+		return nil, errors.New("participants is required")
+	}
+	data.threshold = viper.GetUint32("threshold")
+	if data.threshold == 0 {
+		return nil, errors.New("threshold is required")
+	}
+	if data.threshold > data.participants {
+		return nil, errors.New("threshold cannot be more than participants")
+	}
+
+	return data, nil
+}

cmd/wallet/sharedexport/input_internal_test.go

@@ -0,0 +1,153 @@
+// Copyright © 2021 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 walletsharedexport
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/spf13/viper"
+	"github.com/stretchr/testify/require"
+	e2types "github.com/wealdtech/go-eth2-types/v2"
+	e2wallet "github.com/wealdtech/go-eth2-wallet"
+	keystorev4 "github.com/wealdtech/go-eth2-wallet-encryptor-keystorev4"
+	nd "github.com/wealdtech/go-eth2-wallet-nd/v2"
+	scratch "github.com/wealdtech/go-eth2-wallet-store-scratch"
+)
+
+func TestInput(t *testing.T) {
+	require.NoError(t, e2types.InitBLS())
+
+	store := scratch.New()
+	require.NoError(t, e2wallet.UseStore(store))
+	wallet, err := nd.CreateWallet(context.Background(), "Test wallet", store, keystorev4.New())
+	require.NoError(t, err)
+
+	tests := []struct {
+		name string
+		vars map[string]interface{}
+		res  *dataIn
+		err  string
+	}{
+		{
+			name: "TimeoutMissing",
+			vars: map[string]interface{}{
+				"wallet": "Test wallet",
+			},
+			err: "timeout is required",
+		},
+		{
+			name: "Quiet",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+				"wallet":  "Test wallet",
+				"quiet":   "true",
+			},
+			err: "quiet not allowed",
+		},
+		{
+			name: "WalletMissing",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+			},
+			err: "failed to access wallet: cannot determine wallet",
+		},
+		{
+			name: "WalletUnknown",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+				"wallet":  "unknown",
+			},
+			err: "failed to access wallet: wallet not found",
+		},
+		{
+			name: "Remote",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+				"remote":  "remoteaddress",
+			},
+			err: "wallet export not available for remote wallets",
+		},
+		{
+			name: "FileMissing",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+				"wallet":  "Test wallet",
+			},
+			err: "file is required",
+		},
+		{
+			name: "ParticipantsMissing",
+			vars: map[string]interface{}{
+				"timeout": "5s",
+				"wallet":  "Test wallet",
+				"file":    "test.dat",
+			},
+			err: "participants is required",
+		},
+		{
+			name: "ThresholdMissing",
+			vars: map[string]interface{}{
+				"timeout":      "5s",
+				"wallet":       "Test wallet",
+				"file":         "test.dat",
+				"participants": "5",
+			},
+			err: "threshold is required",
+		},
+		{
+			name: "ThresholdTooHigh",
+			vars: map[string]interface{}{
+				"timeout":      "5s",
+				"wallet":       "Test wallet",
+				"file":         "test.dat",
+				"participants": "5",
+				"threshold":    "6",
+			},
+			err: "threshold cannot be more than participants",
+		},
+		{
+			name: "Good",
+			vars: map[string]interface{}{
+				"timeout":      "5s",
+				"wallet":       "Test wallet",
+				"file":         "test.dat",
+				"participants": "5",
+				"threshold":    "3",
+			},
+			res: &dataIn{
+				timeout: 5 * time.Second,
+				wallet:  wallet,
+			},
+		},
+	}
+
+	for _, test := range tests {
+		t.Run(test.name, func(t *testing.T) {
+			viper.Reset()
+			for k, v := range test.vars {
+				viper.Set(k, v)
+			}
+			res, err := input(context.Background())
+			if test.err != "" {
+				require.EqualError(t, err, test.err)
+			} else {
+				require.NoError(t, err)
+				require.Equal(t, test.res.timeout, res.timeout)
+				require.Equal(t, test.vars["wallet"], res.wallet.Name())
+			}
+		})
+	}
+}