kasey: Option 2

* Remove Feature Flag From Prater (#12082)

* Use Epoch boundary cache to retrieve balances (#12083)

* Use Epoch boundary cache to retrieve balances

* save boundary states before inserting to forkchoice

* move up last block save

* remove boundary checks on balances

* fix ordering

---------

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

* create the log file along with its parent directory if not present

* only give ReadWritePermissions to the log file

* use io/file package to create the parent directories

* fix ci related issues

* add regression tests

* run gazelle

* fix tests

* remove print statements

* gazelle

* Remove failing test for MkdirAll, this failure is not expected

---------

Co-authored-by: Nishant Das <nishdas93@gmail.com>
Co-authored-by: Potuz <potuz@prysmaticlabs.com>
Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>

.bazelrc

@@ -6,6 +6,12 @@ import %workspace%/build/bazelrc/debug.bazelrc
 import %workspace%/build/bazelrc/hermetic-cc.bazelrc
 import %workspace%/build/bazelrc/performance.bazelrc
 
+# hermetic_cc_toolchain v3.0.1 required changes.
+common --enable_platform_specific_config
+build:linux --sandbox_add_mount_pair=/tmp
+build:macos --sandbox_add_mount_pair=/var/tmp
+build:windows --sandbox_add_mount_pair=C:\Temp
+
 # E2E run with debug gotag
 test:e2e --define gotags=debug
 

.bazelversion

@@ -1 +1 @@
-7.0.0
+7.1.0

README.md

@@ -2,7 +2,7 @@
 
 [![Build status](https://badge.buildkite.com/b555891daf3614bae4284dcf365b2340cefc0089839526f096.svg?branch=master)](https://buildkite.com/prysmatic-labs/prysm)
 [![Go Report Card](https://goreportcard.com/badge/github.com/prysmaticlabs/prysm)](https://goreportcard.com/report/github.com/prysmaticlabs/prysm)
-[![Consensus_Spec_Version 1.3.0](https://img.shields.io/badge/Consensus%20Spec%20Version-v1.3.0-blue.svg)](https://github.com/ethereum/consensus-specs/tree/v1.3.0)
+[![Consensus_Spec_Version 1.4.0](https://img.shields.io/badge/Consensus%20Spec%20Version-v1.4.0-blue.svg)](https://github.com/ethereum/consensus-specs/tree/v1.4.0)
 [![Execution_API_Version 1.0.0-beta.2](https://img.shields.io/badge/Execution%20API%20Version-v1.0.0.beta.2-blue.svg)](https://github.com/ethereum/execution-apis/tree/v1.0.0-beta.2/src/engine)
 [![Discord](https://user-images.githubusercontent.com/7288322/34471967-1df7808a-efbb-11e7-9088-ed0b04151291.png)](https://discord.gg/prysmaticlabs)
 [![GitPOAP Badge](https://public-api.gitpoap.io/v1/repo/prysmaticlabs/prysm/badge)](https://www.gitpoap.io/gh/prysmaticlabs/prysm)

WORKSPACE

@@ -16,12 +16,14 @@ load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
 
 rules_pkg_dependencies()
 
+HERMETIC_CC_TOOLCHAIN_VERSION = "v3.0.1"
+
 http_archive(
     name = "hermetic_cc_toolchain",
-    sha256 = "973ab22945b921ef45b8e1d6ce01ca7ce1b8a462167449a36e297438c4ec2755",
-    strip_prefix = "hermetic_cc_toolchain-5098046bccc15d2962f3cc8e7e53d6a2a26072dc",
+    sha256 = "3bc6ec127622fdceb4129cb06b6f7ab098c4d539124dde96a6318e7c32a53f7a",
     urls = [
-        "https://github.com/uber/hermetic_cc_toolchain/archive/5098046bccc15d2962f3cc8e7e53d6a2a26072dc.tar.gz",  # 2023-06-28
+        "https://mirror.bazel.build/github.com/uber/hermetic_cc_toolchain/releases/download/{0}/hermetic_cc_toolchain-{0}.tar.gz".format(HERMETIC_CC_TOOLCHAIN_VERSION),
+        "https://github.com/uber/hermetic_cc_toolchain/releases/download/{0}/hermetic_cc_toolchain-{0}.tar.gz".format(HERMETIC_CC_TOOLCHAIN_VERSION),
     ],
 )
 
@@ -81,10 +83,10 @@ bazel_skylib_workspace()
 
 http_archive(
     name = "bazel_gazelle",
-    sha256 = "d3fa66a39028e97d76f9e2db8f1b0c11c099e8e01bf363a923074784e451f809",
+    integrity = "sha256-MpOL2hbmcABjA1R5Bj2dJMYO2o15/Uc5Vj9Q0zHLMgk=",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.33.0/bazel-gazelle-v0.33.0.tar.gz",
-        "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.33.0/bazel-gazelle-v0.33.0.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/bazel-gazelle/releases/download/v0.35.0/bazel-gazelle-v0.35.0.tar.gz",
+        "https://github.com/bazelbuild/bazel-gazelle/releases/download/v0.35.0/bazel-gazelle-v0.35.0.tar.gz",
     ],
 )
 
@@ -128,9 +130,9 @@ aspect_bazel_lib_register_toolchains()
 
 http_archive(
     name = "rules_oci",
-    sha256 = "c71c25ed333a4909d2dd77e0b16c39e9912525a98c7fa85144282be8d04ef54c",
-    strip_prefix = "rules_oci-1.3.4",
-    url = "https://github.com/bazel-contrib/rules_oci/releases/download/v1.3.4/rules_oci-v1.3.4.tar.gz",
+    sha256 = "4a276e9566c03491649eef63f27c2816cc222f41ccdebd97d2c5159e84917c3b",
+    strip_prefix = "rules_oci-1.7.4",
+    url = "https://github.com/bazel-contrib/rules_oci/releases/download/v1.7.4/rules_oci-v1.7.4.tar.gz",
 )
 
 load("@rules_oci//oci:dependencies.bzl", "rules_oci_dependencies")
@@ -151,17 +153,13 @@ http_archive(
         # Expose internals of go_test for custom build transitions.
         "//third_party:io_bazel_rules_go_test.patch",
     ],
-    sha256 = "d6ab6b57e48c09523e93050f13698f708428cfd5e619252e369d377af6597707",
+    sha256 = "80a98277ad1311dacd837f9b16db62887702e9f1d1c4c9f796d0121a46c8e184",
     urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.43.0/rules_go-v0.43.0.zip",
-        "https://github.com/bazelbuild/rules_go/releases/download/v0.43.0/rules_go-v0.43.0.zip",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.46.0/rules_go-v0.46.0.zip",
+        "https://github.com/bazelbuild/rules_go/releases/download/v0.46.0/rules_go-v0.46.0.zip",
     ],
 )
 
-load("//:distroless_deps.bzl", "distroless_deps")
-
-distroless_deps()
-
 # Override default import in rules_go with special patch until
 # https://github.com/gogo/protobuf/pull/582 is merged.
 git_repository(
@@ -200,10 +198,14 @@ load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_depe
 go_rules_dependencies()
 
 go_register_toolchains(
-    go_version = "1.21.6",
+    go_version = "1.21.8",
     nogo = "@//:nogo",
 )
 
+load("//:distroless_deps.bzl", "distroless_deps")
+
+distroless_deps()
+
 http_archive(
     name = "io_kubernetes_build",
     sha256 = "b84fbd1173acee9d02a7d3698ad269fdf4f7aa081e9cecd40e012ad0ad8cfa2a",
@@ -241,9 +243,7 @@ filegroup(
     url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
 )
 
-consensus_spec_version = "v1.4.0-beta.7"
-
-consensus_spec_test_version = "v1.4.0-beta.7-hotfix"
+consensus_spec_version = "v1.4.0"
 
 bls_test_version = "v0.1.1"
 
@@ -260,7 +260,7 @@ filegroup(
 )
     """,
     sha256 = "c282c0f86f23f3d2e0f71f5975769a4077e62a7e3c7382a16bd26a7e589811a0",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_test_version,
+    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_version,
 )
 
 http_archive(
@@ -276,7 +276,7 @@ filegroup(
 )
     """,
     sha256 = "4649c35aa3b8eb0cfdc81bee7c05649f90ef36bede5b0513e1f2e8baf37d6033",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_test_version,
+    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_version,
 )
 
 http_archive(
@@ -292,7 +292,7 @@ filegroup(
 )
     """,
     sha256 = "c5a03f724f757456ffaabd2a899992a71d2baf45ee4db65ca3518f2b7ee928c8",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_test_version,
+    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
 )
 
 http_archive(
@@ -306,7 +306,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "049c29267310e6b88280f4f834a75866c2f5b9036fa97acb9d9c6db8f64d9118",
+    sha256 = "cd1c9d97baccbdde1d2454a7dceb8c6c61192a3b581eee12ffc94969f2db8453",
     strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
     url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )

api/client/beacon/BUILD.bazel

@@ -6,11 +6,14 @@ go_library(
         "checkpoint.go",
         "client.go",
         "doc.go",
+        "health.go",
+        "log.go",
     ],
     importpath = "github.com/prysmaticlabs/prysm/v5/api/client/beacon",
     visibility = ["//visibility:public"],
     deps = [
         "//api/client:go_default_library",
+        "//api/client/beacon/iface:go_default_library",
         "//api/server:go_default_library",
         "//api/server/structs:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
@@ -36,10 +39,12 @@ go_test(
     srcs = [
         "checkpoint_test.go",
         "client_test.go",
+        "health_test.go",
     ],
     embed = [":go_default_library"],
     deps = [
         "//api/client:go_default_library",
+        "//api/client/beacon/testing:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/blocks:go_default_library",
@@ -53,5 +58,6 @@ go_test(
         "//testing/util:go_default_library",
         "//time/slots:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
+        "@org_uber_go_mock//gomock:go_default_library",
     ],
 )

api/client/beacon/checkpoint.go

@@ -17,7 +17,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/io/file"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
-	log "github.com/sirupsen/logrus"
+	"github.com/sirupsen/logrus"
 	"golang.org/x/mod/semver"
 )
 
@@ -74,7 +74,12 @@ func DownloadFinalizedData(ctx context.Context, client *Client) (*OriginData, er
 	if err != nil {
 		return nil, errors.Wrap(err, "error detecting chain config for finalized state")
 	}
-	log.Printf("detected supported config in remote finalized state, name=%s, fork=%s", vu.Config.ConfigName, version.String(vu.Fork))
+
+	log.WithFields(logrus.Fields{
+		"name": vu.Config.ConfigName,
+		"fork": version.String(vu.Fork),
+	}).Info("Detected supported config in remote finalized state")
+
 	s, err := vu.UnmarshalBeaconState(sb)
 	if err != nil {
 		return nil, errors.Wrap(err, "error unmarshaling finalized state to correct version")

api/client/beacon/client.go

@@ -22,7 +22,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/network/forks"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
-	log "github.com/sirupsen/logrus"
+	"github.com/sirupsen/logrus"
 )
 
 const (
@@ -309,7 +309,7 @@ func (c *Client) SubmitChangeBLStoExecution(ctx context.Context, request []*stru
 		}
 		for _, failure := range errorJson.Failures {
 			w := request[failure.Index].Message
-			log.WithFields(log.Fields{
+			log.WithFields(logrus.Fields{
 				"validatorIndex":    w.ValidatorIndex,
 				"withdrawalAddress": w.ToExecutionAddress,
 			}).Error(failure.Message)
@@ -341,9 +341,9 @@ type forkScheduleResponse struct {
 func (fsr *forkScheduleResponse) OrderedForkSchedule() (forks.OrderedSchedule, error) {
 	ofs := make(forks.OrderedSchedule, 0)
 	for _, d := range fsr.Data {
-		epoch, err := strconv.Atoi(d.Epoch)
+		epoch, err := strconv.ParseUint(d.Epoch, 10, 64)
 		if err != nil {
-			return nil, err
+			return nil, errors.Wrapf(err, "error parsing epoch %s", d.Epoch)
 		}
 		vSlice, err := hexutil.Decode(d.CurrentVersion)
 		if err != nil {
@@ -355,7 +355,7 @@ func (fsr *forkScheduleResponse) OrderedForkSchedule() (forks.OrderedSchedule, e
 		version := bytesutil.ToBytes4(vSlice)
 		ofs = append(ofs, forks.ForkScheduleEntry{
 			Version: version,
-			Epoch:   primitives.Epoch(uint64(epoch)),
+			Epoch:   primitives.Epoch(epoch),
 		})
 	}
 	sort.Sort(ofs)

api/client/beacon/health.go

@@ -0,0 +1,55 @@
+package beacon
+
+import (
+	"context"
+	"sync"
+
+	"github.com/prysmaticlabs/prysm/v5/api/client/beacon/iface"
+)
+
+type NodeHealthTracker struct {
+	isHealthy  *bool
+	healthChan chan bool
+	node       iface.HealthNode
+	sync.RWMutex
+}
+
+func NewNodeHealthTracker(node iface.HealthNode) *NodeHealthTracker {
+	return &NodeHealthTracker{
+		node:       node,
+		healthChan: make(chan bool, 1),
+	}
+}
+
+// HealthUpdates provides a read-only channel for health updates.
+func (n *NodeHealthTracker) HealthUpdates() <-chan bool {
+	return n.healthChan
+}
+
+func (n *NodeHealthTracker) IsHealthy() bool {
+	n.RLock()
+	defer n.RUnlock()
+	if n.isHealthy == nil {
+		return false
+	}
+	return *n.isHealthy
+}
+
+func (n *NodeHealthTracker) CheckHealth(ctx context.Context) bool {
+	n.RLock()
+	newStatus := n.node.IsHealthy(ctx)
+	if n.isHealthy == nil {
+		n.isHealthy = &newStatus
+	}
+	isStatusChanged := newStatus != *n.isHealthy
+	n.RUnlock()
+
+	if isStatusChanged {
+		n.Lock()
+		// Double-check the condition to ensure it hasn't changed since the first check.
+		n.isHealthy = &newStatus
+		n.Unlock() // It's better to unlock as soon as the protected section is over.
+		n.healthChan <- newStatus
+	}
+	return newStatus
+}

api/client/beacon/health_test.go

@@ -0,0 +1,118 @@
+package beacon
+
+import (
+	"context"
+	"sync"
+	"testing"
+
+	healthTesting "github.com/prysmaticlabs/prysm/v5/api/client/beacon/testing"
+	"go.uber.org/mock/gomock"
+)
+
+func TestNodeHealth_IsHealthy(t *testing.T) {
+	tests := []struct {
+		name      string
+		isHealthy bool
+		want      bool
+	}{
+		{"initially healthy", true, true},
+		{"initially unhealthy", false, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			n := &NodeHealthTracker{
+				isHealthy:  &tt.isHealthy,
+				healthChan: make(chan bool, 1),
+			}
+			if got := n.IsHealthy(); got != tt.want {
+				t.Errorf("IsHealthy() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestNodeHealth_UpdateNodeHealth(t *testing.T) {
+	tests := []struct {
+		name       string
+		initial    bool // Initial health status
+		newStatus  bool // Status to update to
+		shouldSend bool // Should a message be sent through the channel
+	}{
+		{"healthy to unhealthy", true, false, true},
+		{"unhealthy to healthy", false, true, true},
+		{"remain healthy", true, true, false},
+		{"remain unhealthy", false, false, false},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctrl := gomock.NewController(t)
+			defer ctrl.Finish()
+			client := healthTesting.NewMockHealthClient(ctrl)
+			client.EXPECT().IsHealthy(gomock.Any()).Return(tt.newStatus)
+			n := &NodeHealthTracker{
+				isHealthy:  &tt.initial,
+				node:       client,
+				healthChan: make(chan bool, 1),
+			}
+
+			s := n.CheckHealth(context.Background())
+			// Check if health status was updated
+			if s != tt.newStatus {
+				t.Errorf("UpdateNodeHealth() failed to update isHealthy from %v to %v", tt.initial, tt.newStatus)
+			}
+
+			select {
+			case status := <-n.HealthUpdates():
+				if !tt.shouldSend {
+					t.Errorf("UpdateNodeHealth() unexpectedly sent status %v to HealthCh", status)
+				} else if status != tt.newStatus {
+					t.Errorf("UpdateNodeHealth() sent wrong status %v, want %v", status, tt.newStatus)
+				}
+			default:
+				if tt.shouldSend {
+					t.Error("UpdateNodeHealth() did not send any status to HealthCh when expected")
+				}
+			}
+		})
+	}
+}
+
+func TestNodeHealth_Concurrency(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	client := healthTesting.NewMockHealthClient(ctrl)
+	n := NewNodeHealthTracker(client)
+	var wg sync.WaitGroup
+
+	// Number of goroutines to spawn for both reading and writing
+	numGoroutines := 6
+
+	go func() {
+		for range n.HealthUpdates() {
+			// Consume values to avoid blocking on channel send.
+		}
+	}()
+
+	wg.Add(numGoroutines * 2) // for readers and writers
+
+	// Concurrently update health status
+	for i := 0; i < numGoroutines; i++ {
+		go func() {
+			defer wg.Done()
+			client.EXPECT().IsHealthy(gomock.Any()).Return(false)
+			n.CheckHealth(context.Background())
+			client.EXPECT().IsHealthy(gomock.Any()).Return(true)
+			n.CheckHealth(context.Background())
+		}()
+	}
+
+	// Concurrently read health status
+	for i := 0; i < numGoroutines; i++ {
+		go func() {
+			defer wg.Done()
+			_ = n.IsHealthy() // Just read the value
+		}()
+	}
+
+	wg.Wait() // Wait for all goroutines to finish
+}

api/client/beacon/iface/BUILD.bazel

@@ -0,0 +1,8 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["health.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/beacon/iface",
+    visibility = ["//visibility:public"],
+)

api/client/beacon/iface/health.go

@@ -0,0 +1,13 @@
+package iface
+
+import "context"
+
+type HealthTracker interface {
+	HealthUpdates() <-chan bool
+	IsHealthy() bool
+	CheckHealth(ctx context.Context) bool
+}
+
+type HealthNode interface {
+	IsHealthy(ctx context.Context) bool
+}

api/client/beacon/log.go

@@ -0,0 +1,5 @@
+package beacon
+
+import "github.com/sirupsen/logrus"
+
+var log = logrus.WithField("prefix", "beacon")

api/client/beacon/testing/BUILD.bazel

@@ -0,0 +1,12 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["mock.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/beacon/testing",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//api/client/beacon/iface:go_default_library",
+        "@org_uber_go_mock//gomock:go_default_library",
+    ],
+)

api/client/beacon/testing/mock.go

@@ -0,0 +1,53 @@
+package testing
+
+import (
+	"context"
+	"reflect"
+
+	"github.com/prysmaticlabs/prysm/v5/api/client/beacon/iface"
+	"go.uber.org/mock/gomock"
+)
+
+var (
+	_ = iface.HealthNode(&MockHealthClient{})
+)
+
+// MockHealthClient is a mock of HealthClient interface.
+type MockHealthClient struct {
+	ctrl     *gomock.Controller
+	recorder *MockHealthClientMockRecorder
+}
+
+// MockHealthClientMockRecorder is the mock recorder for MockHealthClient.
+type MockHealthClientMockRecorder struct {
+	mock *MockHealthClient
+}
+
+// IsHealthy mocks base method.
+func (m *MockHealthClient) IsHealthy(arg0 context.Context) bool {
+	m.ctrl.T.Helper()
+	ret := m.ctrl.Call(m, "IsHealthy", arg0)
+	ret0, ok := ret[0].(bool)
+	if !ok {
+		return false
+	}
+	return ret0
+}
+
+// EXPECT returns an object that allows the caller to indicate expected use.
+func (m *MockHealthClient) EXPECT() *MockHealthClientMockRecorder {
+	return m.recorder
+}
+
+// IsHealthy indicates an expected call of IsHealthy.
+func (mr *MockHealthClientMockRecorder) IsHealthy(arg0 any) *gomock.Call {
+	mr.mock.ctrl.T.Helper()
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "IsHealthy", reflect.TypeOf((*MockHealthClient)(nil).IsHealthy), arg0)
+}
+
+// NewMockHealthClient creates a new mock instance.
+func NewMockHealthClient(ctrl *gomock.Controller) *MockHealthClient {
+	mock := &MockHealthClient{ctrl: ctrl}
+	mock.recorder = &MockHealthClientMockRecorder{mock}
+	return mock
+}

api/client/builder/client.go

@@ -304,6 +304,8 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 		}
 		versionOpt := func(r *http.Request) {
 			r.Header.Add("Eth-Consensus-Version", version.String(version.Bellatrix))
+			r.Header.Set("Content-Type", "application/json")
+			r.Header.Set("Accept", "application/json")
 		}
 		rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), versionOpt)
 
@@ -341,6 +343,8 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 		}
 		versionOpt := func(r *http.Request) {
 			r.Header.Add("Eth-Consensus-Version", version.String(version.Capella))
+			r.Header.Set("Content-Type", "application/json")
+			r.Header.Set("Accept", "application/json")
 		}
 		rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), versionOpt)
 
@@ -379,6 +383,8 @@ func (c *Client) SubmitBlindedBlock(ctx context.Context, sb interfaces.ReadOnlyS
 
 		versionOpt := func(r *http.Request) {
 			r.Header.Add("Eth-Consensus-Version", version.String(version.Deneb))
+			r.Header.Set("Content-Type", "application/json")
+			r.Header.Set("Accept", "application/json")
 		}
 		rb, err := c.do(ctx, http.MethodPost, postBlindedBeaconBlockPath, bytes.NewBuffer(body), versionOpt)
 		if err != nil {

api/client/builder/client_test.go

@@ -321,6 +321,8 @@ func TestSubmitBlindedBlock(t *testing.T) {
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
 				require.Equal(t, "bellatrix", r.Header.Get("Eth-Consensus-Version"))
+				require.Equal(t, "application/json", r.Header.Get("Content-Type"))
+				require.Equal(t, "application/json", r.Header.Get("Accept"))
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Body:       io.NopCloser(bytes.NewBufferString(testExampleExecutionPayload)),
@@ -347,6 +349,8 @@ func TestSubmitBlindedBlock(t *testing.T) {
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
 				require.Equal(t, "capella", r.Header.Get("Eth-Consensus-Version"))
+				require.Equal(t, "application/json", r.Header.Get("Content-Type"))
+				require.Equal(t, "application/json", r.Header.Get("Accept"))
 				return &http.Response{
 					StatusCode: http.StatusOK,
 					Body:       io.NopCloser(bytes.NewBufferString(testExampleExecutionPayloadCapella)),
@@ -376,6 +380,8 @@ func TestSubmitBlindedBlock(t *testing.T) {
 			Transport: roundtrip(func(r *http.Request) (*http.Response, error) {
 				require.Equal(t, postBlindedBeaconBlockPath, r.URL.Path)
 				require.Equal(t, "deneb", r.Header.Get("Eth-Consensus-Version"))
+				require.Equal(t, "application/json", r.Header.Get("Content-Type"))
+				require.Equal(t, "application/json", r.Header.Get("Accept"))
 				var req structs.SignedBlindedBeaconBlockDeneb
 				err := json.NewDecoder(r.Body).Decode(&req)
 				require.NoError(t, err)

api/client/errors.go

@@ -21,6 +21,9 @@ var ErrNotFound = errors.Wrap(ErrNotOK, "recv 404 NotFound response from API")
 // ErrInvalidNodeVersion indicates that the /eth/v1/node/version API response format was not recognized.
 var ErrInvalidNodeVersion = errors.New("invalid node version response")
 
+// ErrConnectionIssue represents a connection problem.
+var ErrConnectionIssue = errors.New("could not connect")
+
 // Non200Err is a function that parses an HTTP response to handle responses that are not 200 with a formatted error.
 func Non200Err(response *http.Response) error {
 	bodyBytes, err := io.ReadAll(response.Body)

api/client/event/BUILD.bazel

@@ -0,0 +1,24 @@
+load("@prysm//tools/go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["event_stream.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/api/client/event",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//api:go_default_library",
+        "//api/client:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["event_stream_test.go"],
+    embed = [":go_default_library"],
+    deps = [
+        "//testing/require:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+    ],
+)

api/client/event/event_stream.go

@@ -0,0 +1,148 @@
+package event
+
+import (
+	"bufio"
+	"context"
+	"net/http"
+	"net/url"
+	"strings"
+
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/api"
+	"github.com/prysmaticlabs/prysm/v5/api/client"
+	log "github.com/sirupsen/logrus"
+)
+
+const (
+	EventHead                        = "head"
+	EventBlock                       = "block"
+	EventAttestation                 = "attestation"
+	EventVoluntaryExit               = "voluntary_exit"
+	EventBlsToExecutionChange        = "bls_to_execution_change"
+	EventProposerSlashing            = "proposer_slashing"
+	EventAttesterSlashing            = "attester_slashing"
+	EventFinalizedCheckpoint         = "finalized_checkpoint"
+	EventChainReorg                  = "chain_reorg"
+	EventContributionAndProof        = "contribution_and_proof"
+	EventLightClientFinalityUpdate   = "light_client_finality_update"
+	EventLightClientOptimisticUpdate = "light_client_optimistic_update"
+	EventPayloadAttributes           = "payload_attributes"
+	EventBlobSidecar                 = "blob_sidecar"
+	EventError                       = "error"
+	EventConnectionError             = "connection_error"
+)
+
+var (
+	_ = EventStreamClient(&EventStream{})
+)
+
+var DefaultEventTopics = []string{EventHead}
+
+type EventStreamClient interface {
+	Subscribe(eventsChannel chan<- *Event)
+}
+
+type Event struct {
+	EventType string
+	Data      []byte
+}
+
+// EventStream is responsible for subscribing to the Beacon API events endpoint
+// and dispatching received events to subscribers.
+type EventStream struct {
+	ctx        context.Context
+	httpClient *http.Client
+	host       string
+	topics     []string
+}
+
+func NewEventStream(ctx context.Context, httpClient *http.Client, host string, topics []string) (*EventStream, error) {
+	// Check if the host is a valid URL
+	_, err := url.ParseRequestURI(host)
+	if err != nil {
+		return nil, err
+	}
+	if len(topics) == 0 {
+		return nil, errors.New("no topics provided")
+	}
+
+	return &EventStream{
+		ctx:        ctx,
+		httpClient: httpClient,
+		host:       host,
+		topics:     topics,
+	}, nil
+}
+
+func (h *EventStream) Subscribe(eventsChannel chan<- *Event) {
+	allTopics := strings.Join(h.topics, ",")
+	log.WithField("topics", allTopics).Info("Listening to Beacon API events")
+	fullUrl := h.host + "/eth/v1/events?topics=" + allTopics
+	req, err := http.NewRequestWithContext(h.ctx, http.MethodGet, fullUrl, nil)
+	if err != nil {
+		eventsChannel <- &Event{
+			EventType: EventConnectionError,
+			Data:      []byte(errors.Wrap(err, "failed to create HTTP request").Error()),
+		}
+	}
+	req.Header.Set("Accept", api.EventStreamMediaType)
+	req.Header.Set("Connection", api.KeepAlive)
+	resp, err := h.httpClient.Do(req)
+	if err != nil {
+		eventsChannel <- &Event{
+			EventType: EventConnectionError,
+			Data:      []byte(errors.Wrap(err, client.ErrConnectionIssue.Error()).Error()),
+		}
+	}
+
+	defer func() {
+		if closeErr := resp.Body.Close(); closeErr != nil {
+			log.WithError(closeErr).Error("Failed to close events response body")
+		}
+	}()
+	// Create a new scanner to read lines from the response body
+	scanner := bufio.NewScanner(resp.Body)
+
+	var eventType, data string // Variables to store event type and data
+
+	// Iterate over lines of the event stream
+	for scanner.Scan() {
+		select {
+		case <-h.ctx.Done():
+			log.Info("Context canceled, stopping event stream")
+			close(eventsChannel)
+			return
+		default:
+			line := scanner.Text() // TODO(13730): scanner does not handle /r and does not fully adhere to https://html.spec.whatwg.org/multipage/server-sent-events.html#the-eventsource-interface
+			// Handle the event based on your specific format
+			if line == "" {
+				// Empty line indicates the end of an event
+				if eventType != "" && data != "" {
+					// Process the event when both eventType and data are set
+					eventsChannel <- &Event{EventType: eventType, Data: []byte(data)}
+				}
+
+				// Reset eventType and data for the next event
+				eventType, data = "", ""
+				continue
+			}
+			et, ok := strings.CutPrefix(line, "event: ")
+			if ok {
+				// Extract event type from the "event" field
+				eventType = et
+			}
+			d, ok := strings.CutPrefix(line, "data: ")
+			if ok {
+				// Extract data from the "data" field
+				data = d
+			}
+		}
+	}
+
+	if err := scanner.Err(); err != nil {
+		eventsChannel <- &Event{
+			EventType: EventConnectionError,
+			Data:      []byte(errors.Wrap(err, errors.Wrap(client.ErrConnectionIssue, "scanner failed").Error()).Error()),
+		}
+	}
+}

api/client/event/event_stream_test.go

@@ -0,0 +1,80 @@
+package event
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+	"time"
+
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	log "github.com/sirupsen/logrus"
+)
+
+func TestNewEventStream(t *testing.T) {
+	validURL := "http://localhost:8080"
+	invalidURL := "://invalid"
+	topics := []string{"topic1", "topic2"}
+
+	tests := []struct {
+		name    string
+		host    string
+		topics  []string
+		wantErr bool
+	}{
+		{"Valid input", validURL, topics, false},
+		{"Invalid URL", invalidURL, topics, true},
+		{"No topics", validURL, []string{}, true},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			_, err := NewEventStream(context.Background(), &http.Client{}, tt.host, tt.topics)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("NewEventStream() error = %v, wantErr %v", err, tt.wantErr)
+			}
+		})
+	}
+}
+
+func TestEventStream(t *testing.T) {
+	mux := http.NewServeMux()
+	mux.HandleFunc("/eth/v1/events", func(w http.ResponseWriter, r *http.Request) {
+		flusher, ok := w.(http.Flusher)
+		require.Equal(t, true, ok)
+		for i := 1; i <= 2; i++ {
+			_, err := fmt.Fprintf(w, "event: head\ndata: data%d\n\n", i)
+			require.NoError(t, err)
+			flusher.Flush()                    // Trigger flush to simulate streaming data
+			time.Sleep(100 * time.Millisecond) // Simulate delay between events
+		}
+	})
+	server := httptest.NewServer(mux)
+	defer server.Close()
+
+	topics := []string{"head"}
+	eventsChannel := make(chan *Event, 1)
+	stream, err := NewEventStream(context.Background(), http.DefaultClient, server.URL, topics)
+	require.NoError(t, err)
+	go stream.Subscribe(eventsChannel)
+
+	// Collect events
+	var events []*Event
+
+	for len(events) != 2 {
+		select {
+		case event := <-eventsChannel:
+			log.Info(event)
+			events = append(events, event)
+		}
+	}
+
+	// Assertions to verify the events content
+	expectedData := []string{"data1", "data2"}
+	for i, event := range events {
+		if string(event.Data) != expectedData[i] {
+			t.Errorf("Expected event data %q, got %q", expectedData[i], string(event.Data))
+		}
+	}
+}

beacon-chain/blockchain/chain_info.go

@@ -563,3 +563,9 @@ func (s *Service) RecentBlockSlot(root [32]byte) (primitives.Slot, error) {
 func (s *Service) inRegularSync() bool {
 	return s.cfg.SyncChecker.Synced()
 }
+
+// validating returns true if the beacon is tracking some validators that have
+// registered for proposing.
+func (s *Service) validating() bool {
+	return s.cfg.TrackedValidatorsCache.Validating()
+}

beacon-chain/blockchain/log.go

@@ -82,19 +82,20 @@ func logBlockSyncStatus(block interfaces.ReadOnlyBeaconBlock, blockRoot [32]byte
 	if level >= logrus.DebugLevel {
 		parentRoot := block.ParentRoot()
 		lf := logrus.Fields{
-			"slot":                      block.Slot(),
-			"slotInEpoch":               block.Slot() % params.BeaconConfig().SlotsPerEpoch,
-			"block":                     fmt.Sprintf("0x%s...", hex.EncodeToString(blockRoot[:])[:8]),
-			"epoch":                     slots.ToEpoch(block.Slot()),
-			"justifiedEpoch":            justified.Epoch,
-			"justifiedRoot":             fmt.Sprintf("0x%s...", hex.EncodeToString(justified.Root)[:8]),
-			"finalizedEpoch":            finalized.Epoch,
-			"finalizedRoot":             fmt.Sprintf("0x%s...", hex.EncodeToString(finalized.Root)[:8]),
-			"parentRoot":                fmt.Sprintf("0x%s...", hex.EncodeToString(parentRoot[:])[:8]),
-			"version":                   version.String(block.Version()),
-			"sinceSlotStartTime":        prysmTime.Now().Sub(startTime),
-			"chainServiceProcessedTime": prysmTime.Now().Sub(receivedTime) - daWaitedTime,
-			"deposits":                  len(block.Body().Deposits()),
+			"slot":                       block.Slot(),
+			"slotInEpoch":                block.Slot() % params.BeaconConfig().SlotsPerEpoch,
+			"block":                      fmt.Sprintf("0x%s...", hex.EncodeToString(blockRoot[:])[:8]),
+			"epoch":                      slots.ToEpoch(block.Slot()),
+			"justifiedEpoch":             justified.Epoch,
+			"justifiedRoot":              fmt.Sprintf("0x%s...", hex.EncodeToString(justified.Root)[:8]),
+			"finalizedEpoch":             finalized.Epoch,
+			"finalizedRoot":              fmt.Sprintf("0x%s...", hex.EncodeToString(finalized.Root)[:8]),
+			"parentRoot":                 fmt.Sprintf("0x%s...", hex.EncodeToString(parentRoot[:])[:8]),
+			"version":                    version.String(block.Version()),
+			"sinceSlotStartTime":         prysmTime.Now().Sub(startTime),
+			"chainServiceProcessedTime":  prysmTime.Now().Sub(receivedTime) - daWaitedTime,
+			"dataAvailabilityWaitedTime": daWaitedTime,
+			"deposits":                   len(block.Body().Deposits()),
 		}
 		log.WithFields(lf).Debug("Synced new block")
 	} else {

beacon-chain/blockchain/pow_block_test.go

@@ -163,7 +163,7 @@ func Test_getBlkParentHashAndTD(t *testing.T) {
 	parentHash, totalDifficulty, err := service.getBlkParentHashAndTD(ctx, h[:])
 	require.NoError(t, err)
 	require.Equal(t, p, bytesutil.ToBytes32(parentHash))
-	require.Equal(t, td, totalDifficulty.String())
+	require.Equal(t, td, totalDifficulty.Hex())
 
 	_, _, err = service.getBlkParentHashAndTD(ctx, []byte{'c'})
 	require.ErrorContains(t, "could not get pow block: block not found", err)

beacon-chain/blockchain/process_attestation_helpers.go

@@ -18,17 +18,63 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
 )
 
+func (s *Service) getRecentPreState(ctx context.Context, c *ethpb.Checkpoint) state.ReadOnlyBeaconState {
+	headEpoch := slots.ToEpoch(s.HeadSlot())
+	if c.Epoch < headEpoch {
+		return nil
+	}
+	if !s.cfg.ForkChoiceStore.IsCanonical([32]byte(c.Root)) {
+		return nil
+	}
+	if c.Epoch == headEpoch {
+		targetSlot, err := s.cfg.ForkChoiceStore.Slot([32]byte(c.Root))
+		if err != nil {
+			return nil
+		}
+		if slots.ToEpoch(targetSlot)+1 < headEpoch {
+			return nil
+		}
+		st, err := s.HeadStateReadOnly(ctx)
+		if err != nil {
+			return nil
+		}
+		return st
+	}
+	slot, err := slots.EpochStart(c.Epoch)
+	if err != nil {
+		return nil
+	}
+	// Try if we have already set the checkpoint cache
+	epochKey := strconv.FormatUint(uint64(c.Epoch), 10 /* base 10 */)
+	lock := async.NewMultilock(string(c.Root) + epochKey)
+	lock.Lock()
+	defer lock.Unlock()
+	cachedState, err := s.checkpointStateCache.StateByCheckpoint(c)
+	if err != nil {
+		return nil
+	}
+	if cachedState != nil && !cachedState.IsNil() {
+		return cachedState
+	}
+	st, err := s.HeadState(ctx)
+	if err != nil {
+		return nil
+	}
+	st, err = transition.ProcessSlotsUsingNextSlotCache(ctx, st, c.Root, slot)
+	if err != nil {
+		return nil
+	}
+	if err := s.checkpointStateCache.AddCheckpointState(c, st); err != nil {
+		return nil
+	}
+	return st
+}
+
 // getAttPreState retrieves the att pre state by either from the cache or the DB.
 func (s *Service) getAttPreState(ctx context.Context, c *ethpb.Checkpoint) (state.ReadOnlyBeaconState, error) {
 	// If the attestation is recent and canonical we can use the head state to compute the shuffling.
-	headEpoch := slots.ToEpoch(s.HeadSlot())
-	if c.Epoch == headEpoch {
-		targetSlot, err := s.cfg.ForkChoiceStore.Slot([32]byte(c.Root))
-		if err == nil && slots.ToEpoch(targetSlot)+1 >= headEpoch {
-			if s.cfg.ForkChoiceStore.IsCanonical([32]byte(c.Root)) {
-				return s.HeadStateReadOnly(ctx)
-			}
-		}
+	if st := s.getRecentPreState(ctx, c); st != nil {
+		return st, nil
 	}
 	// Use a multilock to allow scoped holding of a mutex by a checkpoint root + epoch
 	// allowing us to behave smarter in terms of how this function is used concurrently.

beacon-chain/blockchain/process_attestation_test.go

@@ -146,6 +146,28 @@ func TestStore_OnAttestation_Ok_DoublyLinkedTree(t *testing.T) {
 	require.NoError(t, service.OnAttestation(ctx, att[0], 0))
 }
 
+func TestService_GetRecentPreState(t *testing.T) {
+	service, _ := minimalTestService(t)
+	ctx := context.Background()
+
+	s, err := util.NewBeaconState()
+	require.NoError(t, err)
+	ckRoot := bytesutil.PadTo([]byte{'A'}, fieldparams.RootLength)
+	cp0 := &ethpb.Checkpoint{Epoch: 0, Root: ckRoot}
+	err = s.SetFinalizedCheckpoint(cp0)
+	require.NoError(t, err)
+
+	st, root, err := prepareForkchoiceState(ctx, 31, [32]byte(ckRoot), [32]byte{}, [32]byte{'R'}, cp0, cp0)
+	require.NoError(t, err)
+	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, root))
+	service.head = &head{
+		root:  [32]byte(ckRoot),
+		state: s,
+		slot:  31,
+	}
+	require.NotNil(t, service.getRecentPreState(ctx, &ethpb.Checkpoint{Epoch: 1, Root: ckRoot}))
+}
+
 func TestService_GetAttPreState_Concurrency(t *testing.T) {
 	service, _ := minimalTestService(t)
 	ctx := context.Background()

beacon-chain/blockchain/process_block.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
+	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
@@ -307,16 +308,16 @@ func (s *Service) updateEpochBoundaryCaches(ctx context.Context, st state.Beacon
 	if err := helpers.UpdateProposerIndicesInCache(ctx, st, e); err != nil {
 		return errors.Wrap(err, "could not update proposer index cache")
 	}
-	go func() {
+	go func(ep primitives.Epoch) {
 		// Use a custom deadline here, since this method runs asynchronously.
 		// We ignore the parent method's context and instead create a new one
 		// with a custom deadline, therefore using the background context instead.
 		slotCtx, cancel := context.WithTimeout(context.Background(), slotDeadline)
 		defer cancel()
-		if err := helpers.UpdateCommitteeCache(slotCtx, st, e+1); err != nil {
+		if err := helpers.UpdateCommitteeCache(slotCtx, st, ep+1); err != nil {
 			log.WithError(err).Warn("Could not update committee cache")
 		}
-	}()
+	}(e)
 	// The latest block header is from the previous epoch
 	r, err := st.LatestBlockHeader().HashTreeRoot()
 	if err != nil {
@@ -558,6 +559,20 @@ func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signed int
 	// The gossip handler for blobs writes the index of each verified blob referencing the given
 	// root to the channel returned by blobNotifiers.forRoot.
 	nc := s.blobNotifiers.forRoot(root)
+
+	// Log for DA checks that cross over into the next slot; helpful for debugging.
+	nextSlot := slots.BeginsAt(signed.Block().Slot()+1, s.genesisTime)
+	// Avoid logging if DA check is called after next slot start.
+	if nextSlot.After(time.Now()) {
+		nst := time.AfterFunc(time.Until(nextSlot), func() {
+			if len(missing) == 0 {
+				return
+			}
+			log.WithFields(daCheckLogFields(root, signed.Block().Slot(), expected, len(missing))).
+				Error("Still waiting for DA check at slot end.")
+		})
+		defer nst.Stop()
+	}
 	for {
 		select {
 		case idx := <-nc:
@@ -571,11 +586,20 @@ func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signed int
 			s.blobNotifiers.delete(root)
 			return nil
 		case <-ctx.Done():
-			return errors.Wrap(ctx.Err(), "context deadline waiting for blob sidecars")
+			return errors.Wrapf(ctx.Err(), "context deadline waiting for blob sidecars slot: %d, BlockRoot: %#x", block.Slot(), root)
 		}
 	}
 }
 
+func daCheckLogFields(root [32]byte, slot primitives.Slot, expected, missing int) logrus.Fields {
+	return logrus.Fields{
+		"slot":          slot,
+		"root":          fmt.Sprintf("%#x", root),
+		"blobsExpected": expected,
+		"blobsWaiting":  missing,
+	}
+}
+
 // lateBlockTasks  is called 4 seconds into the slot and performs tasks
 // related to late blocks. It emits a MissedSlot state feed event.
 // It calls FCU and sets the right attributes if we are proposing next slot

beacon-chain/blockchain/process_block_test.go

@@ -2115,7 +2115,7 @@ func TestMissingIndices(t *testing.T) {
 	for _, c := range cases {
 		bm, bs := filesystem.NewEphemeralBlobStorageWithMocker(t)
 		t.Run(c.name, func(t *testing.T) {
-			require.NoError(t, bm.CreateFakeIndices(c.root, c.present))
+			require.NoError(t, bm.CreateFakeIndices(c.root, c.present...))
 			missing, err := missingIndices(bs, c.root, c.expected)
 			if c.err != nil {
 				require.ErrorIs(t, err, c.err)

beacon-chain/blockchain/receive_attestation.go

@@ -95,7 +95,9 @@ func (s *Service) spawnProcessAttestationsRoutine() {
 				return
 			case slotInterval := <-ticker.C():
 				if slotInterval.Interval > 0 {
-					s.UpdateHead(s.ctx, slotInterval.Slot+1)
+					if s.validating() {
+						s.UpdateHead(s.ctx, slotInterval.Slot+1)
+					}
 				} else {
 					s.cfg.ForkChoiceStore.Lock()
 					if err := s.cfg.ForkChoiceStore.NewSlot(s.ctx, slotInterval.Slot); err != nil {

beacon-chain/blockchain/receive_block.go

@@ -97,6 +97,7 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig
 	eg, _ := errgroup.WithContext(ctx)
 	var postState state.BeaconState
 	eg.Go(func() error {
+		var err error
 		postState, err = s.validateStateTransition(ctx, preState, blockCopy)
 		if err != nil {
 			return errors.Wrap(err, "failed to validate consensus state transition function")
@@ -105,6 +106,7 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig
 	})
 	var isValidPayload bool
 	eg.Go(func() error {
+		var err error
 		isValidPayload, err = s.validateExecutionOnBlock(ctx, preStateVersion, preStateHeader, blockCopy, blockRoot)
 		if err != nil {
 			return errors.Wrap(err, "could not notify the engine of the new payload")

beacon-chain/cache/depositsnapshot/deposit_cache_test.go

@@ -1189,11 +1189,3 @@ func BenchmarkDepositTree_HashTreeRootOldImplementation(b *testing.B) {
 		require.NoError(b, err)
 	}
 }
-
-func emptyEth1data() *ethpb.Eth1Data {
-	return &ethpb.Eth1Data{
-		DepositRoot:  make([]byte, 32),
-		DepositCount: 0,
-		BlockHash:    make([]byte, 32),
-	}
-}

beacon-chain/cache/depositsnapshot/deposit_tree.go

@@ -15,8 +15,6 @@ import (
 )
 
 var (
-	// ErrEmptyExecutionBlock occurs when the execution block is nil.
-	ErrEmptyExecutionBlock = errors.New("empty execution block")
 	// ErrInvalidSnapshotRoot occurs when the snapshot root does not match the calculated root.
 	ErrInvalidSnapshotRoot = errors.New("snapshot root is invalid")
 	// ErrInvalidDepositCount occurs when the value for mix in length is 0.

beacon-chain/cache/proposer_indices_type.go

@@ -1,15 +1,9 @@
 package cache
 
 import (
-	"errors"
-
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 )
 
-// ErrNotProposerIndices will be returned when a cache object is not a pointer to
-// a ProposerIndices struct.
-var ErrNotProposerIndices = errors.New("object is not a proposer indices struct")
-
 // ProposerIndices defines the cached struct for proposer indices.
 type ProposerIndices struct {
 	BlockRoot       [32]byte

beacon-chain/cache/skip_slot_cache.go

@@ -109,10 +109,6 @@ func (c *SkipSlotCache) Get(ctx context.Context, r [32]byte) (state.BeaconState,
 // MarkInProgress a request so that any other similar requests will block on
 // Get until MarkNotInProgress is called.
 func (c *SkipSlotCache) MarkInProgress(r [32]byte) error {
-	if c.disabled {
-		return nil
-	}
-
 	c.lock.Lock()
 	defer c.lock.Unlock()
 
@@ -126,10 +122,6 @@ func (c *SkipSlotCache) MarkInProgress(r [32]byte) error {
 // MarkNotInProgress will release the lock on a given request. This should be
 // called after put.
 func (c *SkipSlotCache) MarkNotInProgress(r [32]byte) {
-	if c.disabled {
-		return
-	}
-
 	c.lock.Lock()
 	defer c.lock.Unlock()
 

beacon-chain/cache/skip_slot_cache_test.go

@@ -2,6 +2,7 @@ package cache_test
 
 import (
 	"context"
+	"sync"
 	"testing"
 
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
@@ -35,3 +36,28 @@ func TestSkipSlotCache_RoundTrip(t *testing.T) {
 	require.NoError(t, err)
 	assert.DeepEqual(t, res.ToProto(), s.ToProto(), "Expected equal protos to return from cache")
 }
+
+func TestSkipSlotCache_DisabledAndEnabled(t *testing.T) {
+	ctx := context.Background()
+	c := cache.NewSkipSlotCache()
+
+	r := [32]byte{'a'}
+	c.Disable()
+
+	require.NoError(t, c.MarkInProgress(r))
+
+	c.Enable()
+	wg := new(sync.WaitGroup)
+	wg.Add(1)
+	go func() {
+		// Get call will only terminate when
+		// it is not longer in progress.
+		obj, err := c.Get(ctx, r)
+		require.NoError(t, err)
+		require.IsNil(t, obj)
+		wg.Done()
+	}()
+
+	c.MarkNotInProgress(r)
+	wg.Wait()
+}

beacon-chain/cache/tracked_validators.go

@@ -41,3 +41,9 @@ func (t *TrackedValidatorsCache) Prune() {
 	defer t.Unlock()
 	t.trackedValidators = make(map[primitives.ValidatorIndex]TrackedValidator)
 }
+
+func (t *TrackedValidatorsCache) Validating() bool {
+	t.Lock()
+	defer t.Unlock()
+	return len(t.trackedValidators) > 0
+}

beacon-chain/core/epoch/precompute/BUILD.bazel

@@ -14,6 +14,7 @@ go_library(
     visibility = [
         "//beacon-chain:__subpackages__",
         "//testing/spectest:__subpackages__",
+        "//tools:__subpackages__",
     ],
     deps = [
         "//beacon-chain/core/helpers:go_default_library",

beacon-chain/das/BUILD.bazel

@@ -40,7 +40,6 @@ go_test(
         "//consensus-types/blocks:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//encoding/bytesutil:go_default_library",
-        "//proto/prysm/v1alpha1:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
         "//time/slots:go_default_library",

beacon-chain/das/availability_test.go

@@ -13,7 +13,6 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
 	"github.com/prysmaticlabs/prysm/v5/testing/util"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
@@ -114,16 +113,6 @@ func Test_commitmentsToCheck(t *testing.T) {
 	}
 }
 
-func daAlwaysSucceeds(_ [][]byte, _ []*ethpb.BlobSidecar) error {
-	return nil
-}
-
-type mockDA struct {
-	t   *testing.T
-	scs []blocks.ROBlob
-	err error
-}
-
 func TestLazilyPersistent_Missing(t *testing.T) {
 	ctx := context.Background()
 	store := filesystem.NewEphemeralBlobStorage(t)

beacon-chain/db/errors.go

@@ -19,9 +19,6 @@ var ErrNotFoundState = kv.ErrNotFoundState
 // ErrNotFoundOriginBlockRoot wraps ErrNotFound for an error specific to the origin block root.
 var ErrNotFoundOriginBlockRoot = kv.ErrNotFoundOriginBlockRoot
 
-// ErrNotFoundBackfillBlockRoot wraps ErrNotFound for an error specific to the backfill block root.
-var ErrNotFoundBackfillBlockRoot = kv.ErrNotFoundBackfillBlockRoot
-
 // IsNotFound allows callers to treat errors from a flat-file database, where the file record is missing,
 // as equivalent to db.ErrNotFound.
 func IsNotFound(err error) bool {

beacon-chain/db/filesystem/BUILD.bazel

@@ -44,7 +44,6 @@ go_test(
         "//proto/prysm/v1alpha1:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",
-        "@com_github_pkg_errors//:go_default_library",
         "@com_github_prysmaticlabs_fastssz//:go_default_library",
         "@com_github_spf13_afero//:go_default_library",
     ],

beacon-chain/db/filesystem/blob_test.go

@@ -6,9 +6,7 @@ import (
 	"path"
 	"sync"
 	"testing"
-	"time"
 
-	"github.com/pkg/errors"
 	ssz "github.com/prysmaticlabs/fastssz"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/verification"
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
@@ -129,29 +127,6 @@ func TestBlobStorage_SaveBlobData(t *testing.T) {
 }
 
 // pollUntil polls a condition function until it returns true or a timeout is reached.
-func pollUntil(t *testing.T, fs afero.Fs, expected int) error {
-	var remainingFolders []os.FileInfo
-	var err error
-	// Define the condition function for polling
-	conditionFunc := func() bool {
-		remainingFolders, err = afero.ReadDir(fs, ".")
-		require.NoError(t, err)
-		return len(remainingFolders) == expected
-	}
-
-	startTime := time.Now()
-	for {
-		if conditionFunc() {
-			break // Condition met, exit the loop
-		}
-		if time.Since(startTime) > 30*time.Second {
-			return errors.New("timeout")
-		}
-		time.Sleep(1 * time.Second) // Adjust the sleep interval as needed
-	}
-	require.Equal(t, expected, len(remainingFolders))
-	return nil
-}
 
 func TestBlobIndicesBounds(t *testing.T) {
 	fs, bs, err := NewEphemeralBlobStorageWithFs(t)

beacon-chain/db/filesystem/ephemeral.go

@@ -37,7 +37,7 @@ type BlobMocker struct {
 
 // CreateFakeIndices creates empty blob sidecar files at the expected path for the given
 // root and indices to influence the result of Indices().
-func (bm *BlobMocker) CreateFakeIndices(root [32]byte, indices []uint64) error {
+func (bm *BlobMocker) CreateFakeIndices(root [32]byte, indices ...uint64) error {
 	for i := range indices {
 		n := blobNamer{root: root, index: indices[i]}
 		if err := bm.fs.MkdirAll(n.dir(), directoryPermissions); err != nil {

beacon-chain/db/kv/blocks.go

@@ -224,7 +224,7 @@ func (s *Store) DeleteBlock(ctx context.Context, root [32]byte) error {
 	return s.db.Update(func(tx *bolt.Tx) error {
 		bkt := tx.Bucket(finalizedBlockRootsIndexBucket)
 		if b := bkt.Get(root[:]); b != nil {
-			return ErrDeleteJustifiedAndFinalized
+			return ErrDeleteFinalized
 		}
 
 		if err := tx.Bucket(blocksBucket).Delete(root[:]); err != nil {

beacon-chain/db/kv/blocks_test.go

@@ -289,7 +289,7 @@ func TestStore_DeleteBlock(t *testing.T) {
 	require.Equal(t, b, nil)
 	require.Equal(t, false, db.HasStateSummary(ctx, root2))
 
-	require.ErrorIs(t, db.DeleteBlock(ctx, root), ErrDeleteJustifiedAndFinalized)
+	require.ErrorIs(t, db.DeleteBlock(ctx, root), ErrDeleteFinalized)
 }
 
 func TestStore_DeleteJustifiedBlock(t *testing.T) {
@@ -309,7 +309,7 @@ func TestStore_DeleteJustifiedBlock(t *testing.T) {
 	require.NoError(t, db.SaveBlock(ctx, blk))
 	require.NoError(t, db.SaveState(ctx, st, root))
 	require.NoError(t, db.SaveJustifiedCheckpoint(ctx, cp))
-	require.ErrorIs(t, db.DeleteBlock(ctx, root), ErrDeleteJustifiedAndFinalized)
+	require.ErrorIs(t, db.DeleteBlock(ctx, root), ErrDeleteFinalized)
 }
 
 func TestStore_DeleteFinalizedBlock(t *testing.T) {
@@ -329,7 +329,7 @@ func TestStore_DeleteFinalizedBlock(t *testing.T) {
 	require.NoError(t, db.SaveState(ctx, st, root))
 	require.NoError(t, db.SaveGenesisBlockRoot(ctx, root))
 	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, cp))
-	require.ErrorIs(t, db.DeleteBlock(ctx, root), ErrDeleteJustifiedAndFinalized)
+	require.ErrorIs(t, db.DeleteBlock(ctx, root), ErrDeleteFinalized)
 }
 func TestStore_GenesisBlock(t *testing.T) {
 	db := setupDB(t)

beacon-chain/db/kv/error.go

@@ -2,8 +2,8 @@ package kv
 
 import "github.com/pkg/errors"
 
-// ErrDeleteJustifiedAndFinalized is raised when we attempt to delete a finalized block/state
-var ErrDeleteJustifiedAndFinalized = errors.New("cannot delete finalized block or state")
+// ErrDeleteFinalized is raised when we attempt to delete a finalized block/state
+var ErrDeleteFinalized = errors.New("cannot delete finalized block or state")
 
 // ErrNotFound can be used directly, or as a wrapped DBError, whenever a db method needs to
 // indicate that a value couldn't be found.

beacon-chain/db/kv/finalized_block_roots.go

@@ -5,7 +5,6 @@ import (
 	"context"
 
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/db/filters"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
@@ -29,72 +28,76 @@ var containerFinalizedButNotCanonical = []byte("recent block needs reindexing to
 // beacon block chain using the finalized root alone as this would exclude all other blocks in the
 // finalized epoch from being indexed as "final and canonical".
 //
-// The algorithm for building the index works as follows:
-//   - De-index all finalized beacon block roots from previous_finalized_epoch to
-//     new_finalized_epoch. (I.e. delete these roots from the index, to be re-indexed.)
-//   - Build the canonical finalized chain by walking up the ancestry chain from the finalized block
-//     root until a parent is found in the index, or the parent is genesis or the origin checkpoint.
-//   - Add all block roots in the database where epoch(block.slot) == checkpoint.epoch.
-//
-// This method ensures that all blocks from the current finalized epoch are considered "final" while
-// maintaining only canonical and finalized blocks older than the current finalized epoch.
+// The main part of the algorithm traverses parent->child block relationships in the
+// `blockParentRootIndicesBucket` bucket to find the path between the last finalized checkpoint
+// and the current finalized checkpoint. It relies on the invariant that there is a unique path
+// between two finalized checkpoints.
 func (s *Store) updateFinalizedBlockRoots(ctx context.Context, tx *bolt.Tx, checkpoint *ethpb.Checkpoint) error {
 	ctx, span := trace.StartSpan(ctx, "BeaconDB.updateFinalizedBlockRoots")
 	defer span.End()
 
-	bkt := tx.Bucket(finalizedBlockRootsIndexBucket)
-
-	root := checkpoint.Root
-	var previousRoot []byte
-	genesisRoot := tx.Bucket(blocksBucket).Get(genesisBlockRootKey)
-	initCheckpointRoot := tx.Bucket(blocksBucket).Get(originCheckpointBlockRootKey)
-
-	// De-index recent finalized block roots, to be re-indexed.
+	finalizedBkt := tx.Bucket(finalizedBlockRootsIndexBucket)
 	previousFinalizedCheckpoint := &ethpb.Checkpoint{}
-	if b := bkt.Get(previousFinalizedCheckpointKey); b != nil {
+	if b := finalizedBkt.Get(previousFinalizedCheckpointKey); b != nil {
 		if err := decode(ctx, b, previousFinalizedCheckpoint); err != nil {
 			tracing.AnnotateError(span, err)
 			return err
 		}
 	}
 
-	blockRoots, err := s.BlockRoots(ctx, filters.NewFilter().
-		SetStartEpoch(previousFinalizedCheckpoint.Epoch).
-		SetEndEpoch(checkpoint.Epoch+1),
-	)
-	if err != nil {
-		tracing.AnnotateError(span, err)
-		return err
-	}
-	for _, root := range blockRoots {
-		if err := bkt.Delete(root[:]); err != nil {
-			tracing.AnnotateError(span, err)
-			return err
-		}
-	}
-
-	// Walk up the ancestry chain until we reach a block root present in the finalized block roots
-	// index bucket or genesis block root.
-	for {
-		if bytes.Equal(root, genesisRoot) {
-			break
-		}
-
-		signedBlock, err := s.Block(ctx, bytesutil.ToBytes32(root))
+	// Handle the case of checkpoint sync.
+	if previousFinalizedCheckpoint.Root == nil && bytes.Equal(checkpoint.Root, tx.Bucket(blocksBucket).Get(originCheckpointBlockRootKey)) {
+		container := &ethpb.FinalizedBlockRootContainer{}
+		enc, err := encode(ctx, container)
 		if err != nil {
 			tracing.AnnotateError(span, err)
 			return err
 		}
-		if err := blocks.BeaconBlockIsNil(signedBlock); err != nil {
+		if err = finalizedBkt.Put(checkpoint.Root, enc); err != nil {
 			tracing.AnnotateError(span, err)
 			return err
 		}
-		block := signedBlock.Block()
+		return updatePrevFinalizedCheckpoint(ctx, span, finalizedBkt, checkpoint)
+	}
 
-		parentRoot := block.ParentRoot()
-		container := &ethpb.FinalizedBlockRootContainer{
-			ParentRoot: parentRoot[:],
-			ChildRoot:  previousRoot,
+	var finalized [][]byte
+	if previousFinalizedCheckpoint.Root == nil {
+		genesisRoot := tx.Bucket(blocksBucket).Get(genesisBlockRootKey)
+		_, finalized = pathToFinalizedCheckpoint(ctx, [][]byte{genesisRoot}, checkpoint.Root, tx)
+	} else {
+		if err := updateChildOfPrevFinalizedCheckpoint(
+			ctx,
+			span,
+			finalizedBkt,
+			tx.Bucket(blockParentRootIndicesBucket), previousFinalizedCheckpoint.Root,
+		); err != nil {
+			return err
+		}
+		_, finalized = pathToFinalizedCheckpoint(ctx, [][]byte{previousFinalizedCheckpoint.Root}, checkpoint.Root, tx)
+	}
+
+	for i, r := range finalized {
+		var container *ethpb.FinalizedBlockRootContainer
+		switch i {
+		case 0:
+			container = &ethpb.FinalizedBlockRootContainer{
+				ParentRoot: previousFinalizedCheckpoint.Root,
+			}
+			if len(finalized) > 1 {
+				container.ChildRoot = finalized[i+1]
+			}
+		case len(finalized) - 1:
+			// We don't know the finalized child of the new finalized checkpoint.
+			// It will be filled out in the next function call.
+			container = &ethpb.FinalizedBlockRootContainer{}
+			if len(finalized) > 1 {
+				container.ParentRoot = finalized[i-1]
+			}
+		default:
+			container = &ethpb.FinalizedBlockRootContainer{
+				ParentRoot: finalized[i-1],
+				ChildRoot:  finalized[i+1],
+			}
 		}
 
 		enc, err := encode(ctx, container)
@@ -102,66 +105,13 @@ func (s *Store) updateFinalizedBlockRoots(ctx context.Context, tx *bolt.Tx, chec
 			tracing.AnnotateError(span, err)
 			return err
 		}
-		if err := bkt.Put(root, enc); err != nil {
-			tracing.AnnotateError(span, err)
-			return err
-		}
-
-		// breaking here allows the initial checkpoint root to be correctly inserted,
-		// but stops the loop from trying to search for its parent.
-		if bytes.Equal(root, initCheckpointRoot) {
-			break
-		}
-
-		// Found parent, loop exit condition.
-		pr := block.ParentRoot()
-		if parentBytes := bkt.Get(pr[:]); parentBytes != nil {
-			parent := &ethpb.FinalizedBlockRootContainer{}
-			if err := decode(ctx, parentBytes, parent); err != nil {
-				tracing.AnnotateError(span, err)
-				return err
-			}
-			parent.ChildRoot = root
-			enc, err := encode(ctx, parent)
-			if err != nil {
-				tracing.AnnotateError(span, err)
-				return err
-			}
-			if err := bkt.Put(pr[:], enc); err != nil {
-				tracing.AnnotateError(span, err)
-				return err
-			}
-			break
-		}
-		previousRoot = root
-		root = pr[:]
-	}
-
-	// Upsert blocks from the current finalized epoch.
-	roots, err := s.BlockRoots(ctx, filters.NewFilter().SetStartEpoch(checkpoint.Epoch).SetEndEpoch(checkpoint.Epoch+1))
-	if err != nil {
-		tracing.AnnotateError(span, err)
-		return err
-	}
-	for _, root := range roots {
-		root := root[:]
-		if bytes.Equal(root, checkpoint.Root) || bkt.Get(root) != nil {
-			continue
-		}
-		if err := bkt.Put(root, containerFinalizedButNotCanonical); err != nil {
+		if err = finalizedBkt.Put(r, enc); err != nil {
 			tracing.AnnotateError(span, err)
 			return err
 		}
 	}
 
-	// Update previous checkpoint
-	enc, err := encode(ctx, checkpoint)
-	if err != nil {
-		tracing.AnnotateError(span, err)
-		return err
-	}
-
-	return bkt.Put(previousFinalizedCheckpointKey, enc)
+	return updatePrevFinalizedCheckpoint(ctx, span, finalizedBkt, checkpoint)
 }
 
 // BackfillFinalizedIndex updates the finalized index for a contiguous chain of blocks that are the ancestors of the
@@ -201,21 +151,20 @@ func (s *Store) BackfillFinalizedIndex(ctx context.Context, blocks []blocks.ROBl
 			return err
 		}
 		encs[i-1] = penc
-
-		// The final element is the parent of finalizedChildRoot. This is checked inside the db transaction using
-		// the parent_root value stored in the index data for finalizedChildRoot.
-		if i == len(blocks)-1 {
-			fbrs[i].ChildRoot = finalizedChildRoot[:]
-			// Final element is complete, so it is pre-encoded like the others.
-			enc, err := encode(ctx, fbrs[i])
-			if err != nil {
-				tracing.AnnotateError(span, err)
-				return err
-			}
-			encs[i] = enc
-		}
 	}
 
+	// The final element is the parent of finalizedChildRoot. This is checked inside the db transaction using
+	// the parent_root value stored in the index data for finalizedChildRoot.
+	lastIdx := len(blocks) - 1
+	fbrs[lastIdx].ChildRoot = finalizedChildRoot[:]
+	// Final element is complete, so it is pre-encoded like the others.
+	enc, err := encode(ctx, fbrs[lastIdx])
+	if err != nil {
+		tracing.AnnotateError(span, err)
+		return err
+	}
+	encs[lastIdx] = enc
+
 	return s.db.Update(func(tx *bolt.Tx) error {
 		bkt := tx.Bucket(finalizedBlockRootsIndexBucket)
 		child := bkt.Get(finalizedChildRoot[:])
@@ -243,8 +192,6 @@ func (s *Store) BackfillFinalizedIndex(ctx context.Context, blocks []blocks.ROBl
 
 // IsFinalizedBlock returns true if the block root is present in the finalized block root index.
 // A beacon block root contained exists in this index if it is considered finalized and canonical.
-// Note: beacon blocks from the latest finalized epoch return true, whether or not they are
-// considered canonical in the "head view" of the beacon node.
 func (s *Store) IsFinalizedBlock(ctx context.Context, blockRoot [32]byte) bool {
 	_, span := trace.StartSpan(ctx, "BeaconDB.IsFinalizedBlock")
 	defer span.End()
@@ -297,3 +244,53 @@ func (s *Store) FinalizedChildBlock(ctx context.Context, blockRoot [32]byte) (in
 	tracing.AnnotateError(span, err)
 	return blk, err
 }
+
+func pathToFinalizedCheckpoint(ctx context.Context, roots [][]byte, checkpointRoot []byte, tx *bolt.Tx) (bool, [][]byte) {
+	if len(roots) == 0 || (len(roots) == 1 && roots[0] == nil) {
+		return false, nil
+	}
+
+	for _, r := range roots {
+		if bytes.Equal(r, checkpointRoot) {
+			return true, [][]byte{r}
+		}
+		children := lookupValuesForIndices(ctx, map[string][]byte{string(blockParentRootIndicesBucket): r}, tx)
+		if len(children) == 0 {
+			children = [][][]byte{nil}
+		}
+		isPath, path := pathToFinalizedCheckpoint(ctx, children[0], checkpointRoot, tx)
+		if isPath {
+			return true, append([][]byte{r}, path...)
+		}
+	}
+
+	return false, nil
+}
+
+func updatePrevFinalizedCheckpoint(ctx context.Context, span *trace.Span, finalizedBkt *bolt.Bucket, checkpoint *ethpb.Checkpoint) error {
+	enc, err := encode(ctx, checkpoint)
+	if err != nil {
+		tracing.AnnotateError(span, err)
+		return err
+	}
+	return finalizedBkt.Put(previousFinalizedCheckpointKey, enc)
+}
+
+func updateChildOfPrevFinalizedCheckpoint(ctx context.Context, span *trace.Span, finalizedBkt, parentBkt *bolt.Bucket, checkpointRoot []byte) error {
+	container := &ethpb.FinalizedBlockRootContainer{}
+	if err := decode(ctx, finalizedBkt.Get(checkpointRoot), container); err != nil {
+		tracing.AnnotateError(span, err)
+		return err
+	}
+	container.ChildRoot = parentBkt.Get(checkpointRoot)
+	enc, err := encode(ctx, container)
+	if err != nil {
+		tracing.AnnotateError(span, err)
+		return err
+	}
+	if err = finalizedBkt.Put(checkpointRoot, enc); err != nil {
+		tracing.AnnotateError(span, err)
+		return err
+	}
+	return nil
+}

beacon-chain/db/kv/finalized_block_roots_test.go

@@ -26,38 +26,30 @@ func TestStore_IsFinalizedBlock(t *testing.T) {
 	ctx := context.Background()
 
 	require.NoError(t, db.SaveGenesisBlockRoot(ctx, genesisBlockRoot))
-
-	blks := makeBlocks(t, 0, slotsPerEpoch*3, genesisBlockRoot)
+	blks := makeBlocks(t, 0, slotsPerEpoch*2, genesisBlockRoot)
 	require.NoError(t, db.SaveBlocks(ctx, blks))
 
 	root, err := blks[slotsPerEpoch].Block().HashTreeRoot()
 	require.NoError(t, err)
-
 	cp := &ethpb.Checkpoint{
 		Epoch: 1,
 		Root:  root[:],
 	}
-
-	st, err := util.NewBeaconState()
-	require.NoError(t, err)
-	// a state is required to save checkpoint
-	require.NoError(t, db.SaveState(ctx, st, root))
 	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, cp))
 
-	// All blocks up to slotsPerEpoch*2 should be in the finalized index.
-	for i := uint64(0); i < slotsPerEpoch*2; i++ {
-		root, err := blks[i].Block().HashTreeRoot()
+	for i := uint64(0); i <= slotsPerEpoch; i++ {
+		root, err = blks[i].Block().HashTreeRoot()
 		require.NoError(t, err)
-		assert.Equal(t, true, db.IsFinalizedBlock(ctx, root), "Block at index %d was not considered finalized in the index", i)
+		assert.Equal(t, true, db.IsFinalizedBlock(ctx, root), "Block at index %d was not considered finalized", i)
 	}
-	for i := slotsPerEpoch * 3; i < uint64(len(blks)); i++ {
-		root, err := blks[i].Block().HashTreeRoot()
+	for i := slotsPerEpoch + 1; i < uint64(len(blks)); i++ {
+		root, err = blks[i].Block().HashTreeRoot()
 		require.NoError(t, err)
-		assert.Equal(t, false, db.IsFinalizedBlock(ctx, root), "Block at index %d was considered finalized in the index, but should not have", i)
+		assert.Equal(t, false, db.IsFinalizedBlock(ctx, root), "Block at index %d was considered finalized, but should not have", i)
 	}
 }
 
-func TestStore_IsFinalizedBlockGenesis(t *testing.T) {
+func TestStore_IsFinalizedGenesisBlock(t *testing.T) {
 	db := setupDB(t)
 	ctx := context.Background()
 
@@ -69,136 +61,114 @@ func TestStore_IsFinalizedBlockGenesis(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, db.SaveBlock(ctx, wsb))
 	require.NoError(t, db.SaveGenesisBlockRoot(ctx, root))
-	assert.Equal(t, true, db.IsFinalizedBlock(ctx, root), "Finalized genesis block doesn't exist in db")
-}
-
-// This test scenario is to test a specific edge case where the finalized block root is not part of
-// the finalized and canonical chain.
-//
-// Example:
-// 0    1  2  3   4     5   6     slot
-// a <- b <-- d <- e <- f <- g    roots
-//
-//	^- c
-//
-// Imagine that epochs are 2 slots and that epoch 1, 2, and 3 are finalized. Checkpoint roots would
-// be c, e, and g. In this scenario, c was a finalized checkpoint root but no block built upon it so
-// it should not be considered "final and canonical" in the view at slot 6.
-func TestStore_IsFinalized_ForkEdgeCase(t *testing.T) {
-	slotsPerEpoch := uint64(params.BeaconConfig().SlotsPerEpoch)
-	blocks0 := makeBlocks(t, slotsPerEpoch*0, slotsPerEpoch, genesisBlockRoot)
-	blocks1 := append(
-		makeBlocks(t, slotsPerEpoch*1, 1, bytesutil.ToBytes32(sszRootOrDie(t, blocks0[len(blocks0)-1]))), // No block builds off of the first block in epoch.
-		makeBlocks(t, slotsPerEpoch*1+1, slotsPerEpoch-1, bytesutil.ToBytes32(sszRootOrDie(t, blocks0[len(blocks0)-1])))...,
-	)
-	blocks2 := makeBlocks(t, slotsPerEpoch*2, slotsPerEpoch, bytesutil.ToBytes32(sszRootOrDie(t, blocks1[len(blocks1)-1])))
-
-	db := setupDB(t)
-	ctx := context.Background()
-
-	require.NoError(t, db.SaveGenesisBlockRoot(ctx, genesisBlockRoot))
-	require.NoError(t, db.SaveBlocks(ctx, blocks0))
-	require.NoError(t, db.SaveBlocks(ctx, blocks1))
-	require.NoError(t, db.SaveBlocks(ctx, blocks2))
-
-	// First checkpoint
-	checkpoint1 := &ethpb.Checkpoint{
-		Root:  sszRootOrDie(t, blocks1[0]),
-		Epoch: 1,
-	}
-
-	st, err := util.NewBeaconState()
-	require.NoError(t, err)
-	// A state is required to save checkpoint
-	require.NoError(t, db.SaveState(ctx, st, bytesutil.ToBytes32(checkpoint1.Root)))
-	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, checkpoint1))
-	// All blocks in blocks0 and blocks1 should be finalized and canonical.
-	for i, block := range append(blocks0, blocks1...) {
-		root := sszRootOrDie(t, block)
-		assert.Equal(t, true, db.IsFinalizedBlock(ctx, bytesutil.ToBytes32(root)), "%d - Expected block %#x to be finalized", i, root)
-	}
-
-	// Second checkpoint
-	checkpoint2 := &ethpb.Checkpoint{
-		Root:  sszRootOrDie(t, blocks2[0]),
-		Epoch: 2,
-	}
-	// A state is required to save checkpoint
-	require.NoError(t, db.SaveState(ctx, st, bytesutil.ToBytes32(checkpoint2.Root)))
-	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, checkpoint2))
-	// All blocks in blocks0 and blocks2 should be finalized and canonical.
-	for i, block := range append(blocks0, blocks2...) {
-		root := sszRootOrDie(t, block)
-		assert.Equal(t, true, db.IsFinalizedBlock(ctx, bytesutil.ToBytes32(root)), "%d - Expected block %#x to be finalized", i, root)
-	}
-	// All blocks in blocks1 should be finalized and canonical, except blocks1[0].
-	for i, block := range blocks1 {
-		root := sszRootOrDie(t, block)
-		if db.IsFinalizedBlock(ctx, bytesutil.ToBytes32(root)) == (i == 0) {
-			t.Errorf("Expected db.IsFinalizedBlock(ctx, blocks1[%d]) to be %v", i, i != 0)
-		}
-	}
+	assert.Equal(t, true, db.IsFinalizedBlock(ctx, root))
 }
 
 func TestStore_IsFinalizedChildBlock(t *testing.T) {
 	slotsPerEpoch := uint64(params.BeaconConfig().SlotsPerEpoch)
 	ctx := context.Background()
+	db := setupDB(t)
+	require.NoError(t, db.SaveGenesisBlockRoot(ctx, genesisBlockRoot))
 
-	eval := func(t testing.TB, ctx context.Context, db *Store, blks []interfaces.ReadOnlySignedBeaconBlock) {
-		require.NoError(t, db.SaveBlocks(ctx, blks))
-		root, err := blks[slotsPerEpoch].Block().HashTreeRoot()
-		require.NoError(t, err)
-
-		cp := &ethpb.Checkpoint{
-			Epoch: 1,
-			Root:  root[:],
-		}
-
-		st, err := util.NewBeaconState()
-		require.NoError(t, err)
-		// a state is required to save checkpoint
-		require.NoError(t, db.SaveState(ctx, st, root))
-		require.NoError(t, db.SaveFinalizedCheckpoint(ctx, cp))
-
-		// All blocks up to slotsPerEpoch should have a finalized child block.
-		for i := uint64(0); i < slotsPerEpoch; i++ {
-			root, err := blks[i].Block().HashTreeRoot()
-			require.NoError(t, err)
-			assert.Equal(t, true, db.IsFinalizedBlock(ctx, root), "Block at index %d was not considered finalized in the index", i)
-			blk, err := db.FinalizedChildBlock(ctx, root)
-			assert.NoError(t, err)
-			if blk == nil {
-				t.Error("Child block doesn't exist for valid finalized block.")
-			}
-		}
+	blks := makeBlocks(t, 0, slotsPerEpoch*2, genesisBlockRoot)
+	require.NoError(t, db.SaveBlocks(ctx, blks))
+	root, err := blks[slotsPerEpoch].Block().HashTreeRoot()
+	require.NoError(t, err)
+	cp := &ethpb.Checkpoint{
+		Epoch: 1,
+		Root:  root[:],
 	}
+	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, cp))
 
-	setup := func(t testing.TB) *Store {
-		db := setupDB(t)
-		require.NoError(t, db.SaveGenesisBlockRoot(ctx, genesisBlockRoot))
-
-		return db
+	for i := uint64(0); i < slotsPerEpoch; i++ {
+		root, err = blks[i].Block().HashTreeRoot()
+		require.NoError(t, err)
+		assert.Equal(t, true, db.IsFinalizedBlock(ctx, root), "Block at index %d was not considered finalized", i)
+		blk, err := db.FinalizedChildBlock(ctx, root)
+		assert.NoError(t, err)
+		assert.Equal(t, false, blk == nil, "Child block at index %d was not considered finalized", i)
 	}
-
-	t.Run("phase0", func(t *testing.T) {
-		db := setup(t)
-
-		blks := makeBlocks(t, 0, slotsPerEpoch*3, genesisBlockRoot)
-		eval(t, ctx, db, blks)
-	})
-
-	t.Run("altair", func(t *testing.T) {
-		db := setup(t)
-
-		blks := makeBlocksAltair(t, 0, slotsPerEpoch*3, genesisBlockRoot)
-		eval(t, ctx, db, blks)
-	})
 }
 
-func sszRootOrDie(t *testing.T, block interfaces.ReadOnlySignedBeaconBlock) []byte {
-	root, err := block.Block().HashTreeRoot()
+func TestStore_ChildRootOfPrevFinalizedCheckpointIsUpdated(t *testing.T) {
+	slotsPerEpoch := uint64(params.BeaconConfig().SlotsPerEpoch)
+	ctx := context.Background()
+	db := setupDB(t)
+	require.NoError(t, db.SaveGenesisBlockRoot(ctx, genesisBlockRoot))
+
+	blks := makeBlocks(t, 0, slotsPerEpoch*3, genesisBlockRoot)
+	require.NoError(t, db.SaveBlocks(ctx, blks))
+	root, err := blks[slotsPerEpoch].Block().HashTreeRoot()
 	require.NoError(t, err)
-	return root[:]
+	cp := &ethpb.Checkpoint{
+		Epoch: 1,
+		Root:  root[:],
+	}
+	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, cp))
+	root2, err := blks[slotsPerEpoch*2].Block().HashTreeRoot()
+	require.NoError(t, err)
+	cp = &ethpb.Checkpoint{
+		Epoch: 2,
+		Root:  root2[:],
+	}
+	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, cp))
+
+	require.NoError(t, db.db.View(func(tx *bolt.Tx) error {
+		container := &ethpb.FinalizedBlockRootContainer{}
+		f := tx.Bucket(finalizedBlockRootsIndexBucket).Get(root[:])
+		require.NoError(t, decode(ctx, f, container))
+		r, err := blks[slotsPerEpoch+1].Block().HashTreeRoot()
+		require.NoError(t, err)
+		assert.DeepEqual(t, r[:], container.ChildRoot)
+		return nil
+	}))
+}
+
+func TestStore_OrphanedBlockIsNotFinalized(t *testing.T) {
+	slotsPerEpoch := uint64(params.BeaconConfig().SlotsPerEpoch)
+	db := setupDB(t)
+	ctx := context.Background()
+
+	require.NoError(t, db.SaveGenesisBlockRoot(ctx, genesisBlockRoot))
+	blk0 := util.NewBeaconBlock()
+	blk0.Block.ParentRoot = genesisBlockRoot[:]
+	blk0Root, err := blk0.Block.HashTreeRoot()
+	require.NoError(t, err)
+	blk1 := util.NewBeaconBlock()
+	blk1.Block.Slot = 1
+	blk1.Block.ParentRoot = blk0Root[:]
+	blk2 := util.NewBeaconBlock()
+	blk2.Block.Slot = 2
+	// orphan block at index 1
+	blk2.Block.ParentRoot = blk0Root[:]
+	blk2Root, err := blk2.Block.HashTreeRoot()
+	require.NoError(t, err)
+	sBlk0, err := consensusblocks.NewSignedBeaconBlock(blk0)
+	require.NoError(t, err)
+	sBlk1, err := consensusblocks.NewSignedBeaconBlock(blk1)
+	require.NoError(t, err)
+	sBlk2, err := consensusblocks.NewSignedBeaconBlock(blk2)
+	require.NoError(t, err)
+	blks := append([]interfaces.ReadOnlySignedBeaconBlock{sBlk0, sBlk1, sBlk2}, makeBlocks(t, 3, slotsPerEpoch*2-3, blk2Root)...)
+	require.NoError(t, db.SaveBlocks(ctx, blks))
+
+	root, err := blks[slotsPerEpoch].Block().HashTreeRoot()
+	require.NoError(t, err)
+	cp := &ethpb.Checkpoint{
+		Epoch: 1,
+		Root:  root[:],
+	}
+	require.NoError(t, db.SaveFinalizedCheckpoint(ctx, cp))
+
+	for i := uint64(0); i <= slotsPerEpoch; i++ {
+		root, err = blks[i].Block().HashTreeRoot()
+		require.NoError(t, err)
+		if i == 1 {
+			assert.Equal(t, false, db.IsFinalizedBlock(ctx, root), "Block at index 1 was considered finalized, but should not have")
+		} else {
+			assert.Equal(t, true, db.IsFinalizedBlock(ctx, root), "Block at index %d was not considered finalized", i)
+		}
+	}
 }
 
 func makeBlocks(t *testing.T, i, n uint64, previousRoot [32]byte) []interfaces.ReadOnlySignedBeaconBlock {
@@ -219,22 +189,48 @@ func makeBlocks(t *testing.T, i, n uint64, previousRoot [32]byte) []interfaces.R
 	return ifaceBlocks
 }
 
-func makeBlocksAltair(t *testing.T, startIdx, num uint64, previousRoot [32]byte) []interfaces.ReadOnlySignedBeaconBlock {
-	blocks := make([]*ethpb.SignedBeaconBlockAltair, num)
-	ifaceBlocks := make([]interfaces.ReadOnlySignedBeaconBlock, num)
-	for j := startIdx; j < num+startIdx; j++ {
-		parentRoot := make([]byte, fieldparams.RootLength)
-		copy(parentRoot, previousRoot[:])
-		blocks[j-startIdx] = util.NewBeaconBlockAltair()
-		blocks[j-startIdx].Block.Slot = primitives.Slot(j + 1)
-		blocks[j-startIdx].Block.ParentRoot = parentRoot
-		var err error
-		previousRoot, err = blocks[j-startIdx].Block.HashTreeRoot()
-		require.NoError(t, err)
-		ifaceBlocks[j-startIdx], err = consensusblocks.NewSignedBeaconBlock(blocks[j-startIdx])
-		require.NoError(t, err)
+func TestStore_BackfillFinalizedIndexSingle(t *testing.T) {
+	db := setupDB(t)
+	ctx := context.Background()
+	// we're making 4 blocks so we can test an element without a valid child at the end
+	blks, err := consensusblocks.NewROBlockSlice(makeBlocks(t, 0, 4, [32]byte{}))
+	require.NoError(t, err)
+
+	// existing is the child that we'll set up in the index by hand to seed the index.
+	existing := blks[3]
+
+	// toUpdate is a single item update, emulating a backfill batch size of 1. it is the parent of `existing`.
+	toUpdate := blks[2]
+
+	// set up existing finalized block
+	ebpr := existing.Block().ParentRoot()
+	ebr := existing.Root()
+	ebf := &ethpb.FinalizedBlockRootContainer{
+		ParentRoot: ebpr[:],
+		ChildRoot:  make([]byte, 32), // we're bypassing validation to seed the db, so we don't need a valid child.
 	}
-	return ifaceBlocks
+	enc, err := encode(ctx, ebf)
+	require.NoError(t, err)
+	// writing this to the index outside of the validating function to seed the test.
+	err = db.db.Update(func(tx *bolt.Tx) error {
+		bkt := tx.Bucket(finalizedBlockRootsIndexBucket)
+		return bkt.Put(ebr[:], enc)
+	})
+	require.NoError(t, err)
+
+	require.NoError(t, db.BackfillFinalizedIndex(ctx, []consensusblocks.ROBlock{toUpdate}, ebr))
+
+	// make sure that we still correctly validate descendents in the single item case.
+	noChild := blks[0] // will fail to update because we don't have blks[1] in the db.
+	// test wrong child param
+	require.ErrorIs(t, db.BackfillFinalizedIndex(ctx, []consensusblocks.ROBlock{noChild}, ebr), errNotConnectedToFinalized)
+	// test parent of child that isn't finalized
+	require.ErrorIs(t, db.BackfillFinalizedIndex(ctx, []consensusblocks.ROBlock{noChild}, blks[1].Root()), errFinalizedChildNotFound)
+
+	// now make it work by writing the missing block
+	require.NoError(t, db.BackfillFinalizedIndex(ctx, []consensusblocks.ROBlock{blks[1]}, blks[2].Root()))
+	// since blks[1] is now in the index, we should be able to update blks[0]
+	require.NoError(t, db.BackfillFinalizedIndex(ctx, []consensusblocks.ROBlock{blks[0]}, blks[1].Root()))
 }
 
 func TestStore_BackfillFinalizedIndex(t *testing.T) {
@@ -252,23 +248,23 @@ func TestStore_BackfillFinalizedIndex(t *testing.T) {
 		ParentRoot: ebpr[:],
 		ChildRoot:  chldr[:],
 	}
-	disjoint := []consensusblocks.ROBlock{
-		blks[0],
-		blks[2],
-	}
 	enc, err := encode(ctx, ebf)
 	require.NoError(t, err)
 	err = db.db.Update(func(tx *bolt.Tx) error {
 		bkt := tx.Bucket(finalizedBlockRootsIndexBucket)
 		return bkt.Put(ebr[:], enc)
 	})
+	require.NoError(t, err)
 
 	// reslice to remove the existing blocks
 	blks = blks[0:64]
 	// check the other error conditions with a descendent root that really doesn't exist
-	require.NoError(t, err)
+
+	disjoint := []consensusblocks.ROBlock{
+		blks[0],
+		blks[2],
+	}
 	require.ErrorIs(t, db.BackfillFinalizedIndex(ctx, disjoint, [32]byte{}), errIncorrectBlockParent)
-	require.NoError(t, err)
 	require.ErrorIs(t, errFinalizedChildNotFound, db.BackfillFinalizedIndex(ctx, blks, [32]byte{}))
 
 	// use the real root so that it succeeds

beacon-chain/db/kv/kv.go

@@ -137,7 +137,7 @@ func NewKVStore(ctx context.Context, dirPath string, opts ...KVStoreOption) (*St
 		}
 	}
 	datafile := StoreDatafilePath(dirPath)
-	log.Infof("Opening Bolt DB at %s", datafile)
+	log.WithField("path", datafile).Info("Opening Bolt DB")
 	boltDB, err := bolt.Open(
 		datafile,
 		params.BeaconIoConfig().ReadWritePermissions,

beacon-chain/db/kv/state.go

@@ -458,7 +458,7 @@ func (s *Store) DeleteState(ctx context.Context, blockRoot [32]byte) error {
 		bkt = tx.Bucket(stateBucket)
 		// Safeguard against deleting genesis, finalized, head state.
 		if bytes.Equal(blockRoot[:], finalized.Root) || bytes.Equal(blockRoot[:], genesisBlockRoot) || bytes.Equal(blockRoot[:], justified.Root) {
-			return ErrDeleteJustifiedAndFinalized
+			return ErrDeleteFinalized
 		}
 
 		// Nothing to delete if state doesn't exist.

beacon-chain/db/kv/wss.go

@@ -11,6 +11,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/proto/dbval"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
+	"github.com/sirupsen/logrus"
 )
 
 // SaveOrigin loads an ssz serialized Block & BeaconState from an io.Reader
@@ -27,7 +28,11 @@ func (s *Store) SaveOrigin(ctx context.Context, serState, serBlock []byte) error
 		return fmt.Errorf("config mismatch, beacon node configured to connect to %s, detected state is for %s", params.BeaconConfig().ConfigName, cf.Config.ConfigName)
 	}
 
-	log.Infof("detected supported config for state & block version, config name=%s, fork name=%s", cf.Config.ConfigName, version.String(cf.Fork))
+	log.WithFields(logrus.Fields{
+		"configName": cf.Config.ConfigName,
+		"forkName":   version.String(cf.Fork),
+	}).Info("Detected supported config for state & block version")
+
 	state, err := cf.UnmarshalBeaconState(serState)
 	if err != nil {
 		return errors.Wrap(err, "failed to initialize origin state w/ bytes + config+fork")
@@ -57,13 +62,13 @@ func (s *Store) SaveOrigin(ctx context.Context, serState, serBlock []byte) error
 		return errors.Wrap(err, "unable to save backfill status data to db for checkpoint sync")
 	}
 
-	log.Infof("saving checkpoint block to db, w/ root=%#x", blockRoot)
+	log.WithField("root", fmt.Sprintf("%#x", blockRoot)).Info("Saving checkpoint block to db")
 	if err := s.SaveBlock(ctx, wblk); err != nil {
 		return errors.Wrap(err, "could not save checkpoint block")
 	}
 
 	// save state
-	log.Infof("calling SaveState w/ blockRoot=%x", blockRoot)
+	log.WithField("blockRoot", fmt.Sprintf("%#x", blockRoot)).Info("Calling SaveState")
 	if err = s.SaveState(ctx, state, blockRoot); err != nil {
 		return errors.Wrap(err, "could not save state")
 	}

beacon-chain/db/restore.go

@@ -22,7 +22,14 @@ func Restore(cliCtx *cli.Context) error {
 	targetDir := cliCtx.String(cmd.RestoreTargetDirFlag.Name)
 
 	restoreDir := path.Join(targetDir, kv.BeaconNodeDbDirName)
-	if file.Exists(path.Join(restoreDir, kv.DatabaseFileName)) {
+	restoreFile := path.Join(restoreDir, kv.DatabaseFileName)
+
+	dbExists, err := file.Exists(restoreFile, file.Regular)
+	if err != nil {
+		return errors.Wrapf(err, "could not check if database exists in %s", restoreFile)
+	}
+
+	if dbExists {
 		resp, err := prompt.ValidatePrompt(
 			os.Stdin, dbExistsYesNoPrompt, prompt.ValidateYesOrNo,
 		)

beacon-chain/execution/block_reader.go

@@ -110,7 +110,7 @@ func (s *Service) BlockByTimestamp(ctx context.Context, time uint64) (*types.Hea
 		return nil, errors.Wrap(errBlockTimeTooLate, fmt.Sprintf("(%d > %d)", time, latestBlkTime))
 	}
 	// Initialize a pointer to eth1 chain's history to start our search from.
-	cursorNum := big.NewInt(0).SetUint64(latestBlkHeight)
+	cursorNum := new(big.Int).SetUint64(latestBlkHeight)
 	cursorTime := latestBlkTime
 
 	var numOfBlocks uint64
@@ -156,15 +156,15 @@ func (s *Service) BlockByTimestamp(ctx context.Context, time uint64) (*types.Hea
 		return s.retrieveHeaderInfo(ctx, cursorNum.Uint64())
 	}
 	if cursorTime > time {
-		return s.findMaxTargetEth1Block(ctx, big.NewInt(0).SetUint64(estimatedBlk), time)
+		return s.findMaxTargetEth1Block(ctx, new(big.Int).SetUint64(estimatedBlk), time)
 	}
-	return s.findMinTargetEth1Block(ctx, big.NewInt(0).SetUint64(estimatedBlk), time)
+	return s.findMinTargetEth1Block(ctx, new(big.Int).SetUint64(estimatedBlk), time)
 }
 
 // Performs a search to find a target eth1 block which is earlier than or equal to the
 // target time. This method is used when head.time > targetTime
 func (s *Service) findMaxTargetEth1Block(ctx context.Context, upperBoundBlk *big.Int, targetTime uint64) (*types.HeaderInfo, error) {
-	for bn := upperBoundBlk; ; bn = big.NewInt(0).Sub(bn, big.NewInt(1)) {
+	for bn := upperBoundBlk; ; bn = new(big.Int).Sub(bn, big.NewInt(1)) {
 		if ctx.Err() != nil {
 			return nil, ctx.Err()
 		}
@@ -181,7 +181,7 @@ func (s *Service) findMaxTargetEth1Block(ctx context.Context, upperBoundBlk *big
 // Performs a search to find a target eth1 block which is just earlier than or equal to the
 // target time. This method is used when head.time < targetTime
 func (s *Service) findMinTargetEth1Block(ctx context.Context, lowerBoundBlk *big.Int, targetTime uint64) (*types.HeaderInfo, error) {
-	for bn := lowerBoundBlk; ; bn = big.NewInt(0).Add(bn, big.NewInt(1)) {
+	for bn := lowerBoundBlk; ; bn = new(big.Int).Add(bn, big.NewInt(1)) {
 		if ctx.Err() != nil {
 			return nil, ctx.Err()
 		}
@@ -201,7 +201,7 @@ func (s *Service) findMinTargetEth1Block(ctx context.Context, lowerBoundBlk *big
 }
 
 func (s *Service) retrieveHeaderInfo(ctx context.Context, bNum uint64) (*types.HeaderInfo, error) {
-	bn := big.NewInt(0).SetUint64(bNum)
+	bn := new(big.Int).SetUint64(bNum)
 	exists, info, err := s.headerCache.HeaderInfoByHeight(bn)
 	if err != nil {
 		return nil, err

beacon-chain/execution/errors.go

@@ -23,9 +23,6 @@ var (
 	ErrInvalidPayloadAttributes = errors.New("payload attributes are invalid / inconsistent")
 	// ErrUnknownPayloadStatus when the payload status is unknown.
 	ErrUnknownPayloadStatus = errors.New("unknown payload status")
-	// ErrConfigMismatch when the execution node's terminal total difficulty or
-	// terminal block hash received via the API mismatches Prysm's configuration value.
-	ErrConfigMismatch = errors.New("execution client configuration mismatch")
 	// ErrAcceptedSyncingPayloadStatus when the status of the payload is syncing or accepted.
 	ErrAcceptedSyncingPayloadStatus = errors.New("payload status is SYNCING or ACCEPTED")
 	// ErrInvalidPayloadStatus when the status of the payload is invalid.

beacon-chain/execution/log_processing.go

@@ -298,9 +298,7 @@ func (s *Service) processPastLogs(ctx context.Context) error {
 	// Start from the deployment block if our last requested block
 	// is behind it. This is as the deposit logs can only start from the
 	// block of the deployment of the deposit contract.
-	if deploymentBlock > currentBlockNum {
-		currentBlockNum = deploymentBlock
-	}
+	currentBlockNum = max(currentBlockNum, deploymentBlock)
 	// To store all blocks.
 	headersMap := make(map[uint64]*types.HeaderInfo)
 	rawLogCount, err := s.depositContractCaller.GetDepositCount(&bind.CallOpts{})
@@ -384,15 +382,13 @@ func (s *Service) processBlockInBatch(ctx context.Context, currentBlockNum uint6
 	end := currentBlockNum + batchSize
 	// Appropriately bound the request, as we do not
 	// want request blocks beyond the current follow distance.
-	if end > latestFollowHeight {
-		end = latestFollowHeight
-	}
+	end = min(end, latestFollowHeight)
 	query := ethereum.FilterQuery{
 		Addresses: []common.Address{
 			s.cfg.depositContractAddr,
 		},
-		FromBlock: big.NewInt(0).SetUint64(start),
-		ToBlock:   big.NewInt(0).SetUint64(end),
+		FromBlock: new(big.Int).SetUint64(start),
+		ToBlock:   new(big.Int).SetUint64(end),
 	}
 	remainingLogs := logCount - uint64(s.lastReceivedMerkleIndex+1)
 	// only change the end block if the remaining logs are below the required log limit.
@@ -400,7 +396,7 @@ func (s *Service) processBlockInBatch(ctx context.Context, currentBlockNum uint6
 	withinLimit := remainingLogs < depositLogRequestLimit
 	aboveFollowHeight := end >= latestFollowHeight
 	if withinLimit && aboveFollowHeight {
-		query.ToBlock = big.NewInt(0).SetUint64(latestFollowHeight)
+		query.ToBlock = new(big.Int).SetUint64(latestFollowHeight)
 		end = latestFollowHeight
 	}
 	logs, err := s.httpLogger.FilterLogs(ctx, query)
@@ -482,11 +478,11 @@ func (s *Service) requestBatchedHeadersAndLogs(ctx context.Context) error {
 	}
 	for i := s.latestEth1Data.LastRequestedBlock + 1; i <= requestedBlock; i++ {
 		// Cache eth1 block header here.
-		_, err := s.BlockHashByHeight(ctx, big.NewInt(0).SetUint64(i))
+		_, err := s.BlockHashByHeight(ctx, new(big.Int).SetUint64(i))
 		if err != nil {
 			return err
 		}
-		err = s.ProcessETH1Block(ctx, big.NewInt(0).SetUint64(i))
+		err = s.ProcessETH1Block(ctx, new(big.Int).SetUint64(i))
 		if err != nil {
 			return err
 		}

beacon-chain/execution/rpc_connection.go

@@ -77,7 +77,7 @@ func (s *Service) pollConnectionStatus(ctx context.Context) {
 			if currClient != nil {
 				currClient.Close()
 			}
-			log.Infof("Connected to new endpoint: %s", logs.MaskCredentialsLogging(s.cfg.currHttpEndpoint.Url))
+			log.WithField("endpoint", logs.MaskCredentialsLogging(s.cfg.currHttpEndpoint.Url)).Info("Connected to new endpoint")
 			return
 		case <-s.ctx.Done():
 			log.Debug("Received cancelled context,closing existing powchain service")

beacon-chain/execution/service.go

@@ -415,14 +415,11 @@ func (s *Service) batchRequestHeaders(startBlock, endBlock uint64) ([]*types.Hea
 	requestRange := (endBlock - startBlock) + 1
 	elems := make([]gethRPC.BatchElem, 0, requestRange)
 	headers := make([]*types.HeaderInfo, 0, requestRange)
-	if requestRange == 0 {
-		return headers, nil
-	}
 	for i := startBlock; i <= endBlock; i++ {
 		header := &types.HeaderInfo{}
 		elems = append(elems, gethRPC.BatchElem{
 			Method: "eth_getBlockByNumber",
-			Args:   []interface{}{hexutil.EncodeBig(big.NewInt(0).SetUint64(i)), false},
+			Args:   []interface{}{hexutil.EncodeBig(new(big.Int).SetUint64(i)), false},
 			Result: header,
 			Error:  error(nil),
 		})
@@ -675,9 +672,7 @@ func (s *Service) cacheBlockHeaders(start, end uint64) error {
 			// the allotted limit.
 			endReq -= 1
 		}
-		if endReq > end {
-			endReq = end
-		}
+		endReq = min(endReq, end)
 		// We call batchRequestHeaders for its header caching side-effect, so we don't need the return value.
 		_, err := s.batchRequestHeaders(startReq, endReq)
 		if err != nil {

beacon-chain/forkchoice/doubly-linked-tree/reorg_late_blocks.go

@@ -82,6 +82,15 @@ func (f *ForkChoice) ShouldOverrideFCU() (override bool) {
 		return
 	}
 
+	// Return early if we are checking before 10 seconds into the slot
+	secs, err := slots.SecondsSinceSlotStart(head.slot, f.store.genesisTime, uint64(time.Now().Unix()))
+	if err != nil {
+		log.WithError(err).Error("could not check current slot")
+		return true
+	}
+	if secs < ProcessAttestationsThreshold {
+		return true
+	}
 	// Only orphan a block if the parent LMD vote is strong
 	if parent.weight*100 < f.store.committeeWeight*params.BeaconConfig().ReorgParentWeightThreshold {
 		return

beacon-chain/forkchoice/doubly-linked-tree/reorg_late_blocks_test.go

@@ -85,11 +85,19 @@ func TestForkChoice_ShouldOverrideFCU(t *testing.T) {
 		require.Equal(t, false, f.ShouldOverrideFCU())
 		f.store.headNode.parent = saved
 	})
-	t.Run("parent is weak", func(t *testing.T) {
+	t.Run("parent is weak early call", func(t *testing.T) {
 		saved := f.store.headNode.parent.weight
 		f.store.headNode.parent.weight = 0
+		require.Equal(t, true, f.ShouldOverrideFCU())
+		f.store.headNode.parent.weight = saved
+	})
+	t.Run("parent is weak late call", func(t *testing.T) {
+		saved := f.store.headNode.parent.weight
+		driftGenesisTime(f, 2, 11)
+		f.store.headNode.parent.weight = 0
 		require.Equal(t, false, f.ShouldOverrideFCU())
 		f.store.headNode.parent.weight = saved
+		driftGenesisTime(f, 2, orphanLateBlockFirstThreshold+1)
 	})
 	t.Run("Head is strong", func(t *testing.T) {
 		f.store.headNode.weight = f.store.committeeWeight

beacon-chain/node/node.go

@@ -7,9 +7,11 @@ import (
 	"bytes"
 	"context"
 	"fmt"
+	"net"
 	"os"
 	"os/signal"
 	"path/filepath"
+	"strconv"
 	"strings"
 	"sync"
 	"syscall"
@@ -127,51 +129,16 @@ type BeaconNode struct {
 // New creates a new node instance, sets up configuration options, and registers
 // every required service to the node.
 func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*BeaconNode, error) {
-	if err := configureTracing(cliCtx); err != nil {
-		return nil, err
+	if err := configureBeacon(cliCtx); err != nil {
+		return nil, errors.Wrap(err, "could not set beacon configuration options")
 	}
-	prereqs.WarnIfPlatformNotSupported(cliCtx.Context)
-	if hasNetworkFlag(cliCtx) && cliCtx.IsSet(cmd.ChainConfigFileFlag.Name) {
-		return nil, fmt.Errorf("%s cannot be passed concurrently with network flag", cmd.ChainConfigFileFlag.Name)
-	}
-	if err := features.ConfigureBeaconChain(cliCtx); err != nil {
-		return nil, err
-	}
-	if err := cmd.ConfigureBeaconChain(cliCtx); err != nil {
-		return nil, err
-	}
-	flags.ConfigureGlobalFlags(cliCtx)
-	if err := configureChainConfig(cliCtx); err != nil {
-		return nil, err
-	}
-	if err := configureHistoricalSlasher(cliCtx); err != nil {
-		return nil, err
-	}
-	err := configureBuilderCircuitBreaker(cliCtx)
-	if err != nil {
-		return nil, err
-	}
-	if err := configureSlotsPerArchivedPoint(cliCtx); err != nil {
-		return nil, err
-	}
-	if err := configureEth1Config(cliCtx); err != nil {
-		return nil, err
-	}
-	configureNetwork(cliCtx)
-	if err := configureInteropConfig(cliCtx); err != nil {
-		return nil, err
-	}
-	if err := configureExecutionSetting(cliCtx); err != nil {
-		return nil, err
-	}
-	configureFastSSZHashingAlgorithm()
 
 	// Initializes any forks here.
 	params.BeaconConfig().InitializeForkSchedule()
 
 	registry := runtime.NewServiceRegistry()
-
 	ctx := cliCtx.Context
+
 	beacon := &BeaconNode{
 		cliCtx:                  cliCtx,
 		ctx:                     ctx,
@@ -191,10 +158,10 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 		slasherBlockHeadersFeed: new(event.Feed),
 		slasherAttestationsFeed: new(event.Feed),
 		serviceFlagOpts:         &serviceFlagOpts{},
+		initialSyncComplete:     make(chan struct{}),
+		syncChecker:             &initialsync.SyncChecker{},
 	}
 
-	beacon.initialSyncComplete = make(chan struct{})
-	beacon.syncChecker = &initialsync.SyncChecker{}
 	for _, opt := range opts {
 		if err := opt(beacon); err != nil {
 			return nil, err
@@ -203,8 +170,8 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 
 	synchronizer := startup.NewClockSynchronizer()
 	beacon.clockWaiter = synchronizer
-
 	beacon.forkChoicer = doublylinkedtree.New()
+
 	depositAddress, err := execution.DepositContractAddress()
 	if err != nil {
 		return nil, err
@@ -220,112 +187,29 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 		beacon.BlobStorage = blobs
 	}
 
-	log.Debugln("Starting DB")
-	if err := beacon.startDB(cliCtx, depositAddress); err != nil {
-		return nil, err
-	}
-	beacon.BlobStorage.WarmCache()
-
-	log.Debugln("Starting Slashing DB")
-	if err := beacon.startSlasherDB(cliCtx); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering P2P Service")
-	if err := beacon.registerP2P(cliCtx); err != nil {
-		return nil, err
-	}
-
-	bfs, err := backfill.NewUpdater(ctx, beacon.db)
+	bfs, err := startBaseServices(cliCtx, beacon, depositAddress)
 	if err != nil {
-		return nil, errors.Wrap(err, "backfill status initialization error")
-	}
-
-	log.Debugln("Starting State Gen")
-	if err := beacon.startStateGen(ctx, bfs, beacon.forkChoicer); err != nil {
-		if errors.Is(err, stategen.ErrNoGenesisBlock) {
-			log.Errorf("No genesis block/state is found. Prysm only provides a mainnet genesis "+
-				"state bundled in the application. You must provide the --%s or --%s flag to load "+
-				"a genesis block/state for this network.", "genesis-state", "genesis-beacon-api-url")
-		}
-		return nil, err
+		return nil, errors.Wrap(err, "could not start modules")
 	}
 
 	beacon.verifyInitWaiter = verification.NewInitializerWaiter(
 		beacon.clockWaiter, forkchoice.NewROForkChoice(beacon.forkChoicer), beacon.stateGen)
 
 	pa := peers.NewAssigner(beacon.fetchP2P().Peers(), beacon.forkChoicer)
-	beacon.BackfillOpts = append(beacon.BackfillOpts, backfill.WithVerifierWaiter(beacon.verifyInitWaiter),
-		backfill.WithInitSyncWaiter(initSyncWaiter(ctx, beacon.initialSyncComplete)))
+
+	beacon.BackfillOpts = append(
+		beacon.BackfillOpts,
+		backfill.WithVerifierWaiter(beacon.verifyInitWaiter),
+		backfill.WithInitSyncWaiter(initSyncWaiter(ctx, beacon.initialSyncComplete)),
+	)
+
 	bf, err := backfill.NewService(ctx, bfs, beacon.BlobStorage, beacon.clockWaiter, beacon.fetchP2P(), pa, beacon.BackfillOpts...)
 	if err != nil {
 		return nil, errors.Wrap(err, "error initializing backfill service")
 	}
-	if err := beacon.services.RegisterService(bf); err != nil {
-		return nil, errors.Wrap(err, "error registering backfill service")
-	}
 
-	log.Debugln("Registering POW Chain Service")
-	if err := beacon.registerPOWChainService(); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering Attestation Pool Service")
-	if err := beacon.registerAttestationPool(); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering Deterministic Genesis Service")
-	if err := beacon.registerDeterministicGenesisService(); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering Blockchain Service")
-	if err := beacon.registerBlockchainService(beacon.forkChoicer, synchronizer, beacon.initialSyncComplete); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering Initial Sync Service")
-	if err := beacon.registerInitialSyncService(beacon.initialSyncComplete); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering Sync Service")
-	if err := beacon.registerSyncService(beacon.initialSyncComplete, bfs); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering Slasher Service")
-	if err := beacon.registerSlasherService(); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering builder service")
-	if err := beacon.registerBuilderService(cliCtx); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering RPC Service")
-	router := newRouter(cliCtx)
-	if err := beacon.registerRPCService(router); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering GRPC Gateway Service")
-	if err := beacon.registerGRPCGateway(router); err != nil {
-		return nil, err
-	}
-
-	log.Debugln("Registering Validator Monitoring Service")
-	if err := beacon.registerValidatorMonitorService(beacon.initialSyncComplete); err != nil {
-		return nil, err
-	}
-
-	if !cliCtx.Bool(cmd.DisableMonitoringFlag.Name) {
-		log.Debugln("Registering Prometheus Service")
-		if err := beacon.registerPrometheusService(cliCtx); err != nil {
-			return nil, err
-		}
+	if err := registerServices(cliCtx, beacon, synchronizer, bf, bfs); err != nil {
+		return nil, errors.Wrap(err, "could not register services")
 	}
 
 	// db.DatabasePath is the path to the containing directory
@@ -343,6 +227,170 @@ func New(cliCtx *cli.Context, cancel context.CancelFunc, opts ...Option) (*Beaco
 
 	return beacon, nil
 }
+
+func configureBeacon(cliCtx *cli.Context) error {
+	if err := configureTracing(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure tracing")
+	}
+
+	prereqs.WarnIfPlatformNotSupported(cliCtx.Context)
+
+	if hasNetworkFlag(cliCtx) && cliCtx.IsSet(cmd.ChainConfigFileFlag.Name) {
+		return fmt.Errorf("%s cannot be passed concurrently with network flag", cmd.ChainConfigFileFlag.Name)
+	}
+
+	if err := features.ConfigureBeaconChain(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure beacon chain")
+	}
+
+	if err := cmd.ConfigureBeaconChain(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure beacon chain")
+	}
+
+	flags.ConfigureGlobalFlags(cliCtx)
+
+	if err := configureChainConfig(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure chain config")
+	}
+
+	if err := configureHistoricalSlasher(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure historical slasher")
+	}
+
+	if err := configureBuilderCircuitBreaker(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure builder circuit breaker")
+	}
+
+	if err := configureSlotsPerArchivedPoint(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure slots per archived point")
+	}
+
+	if err := configureEth1Config(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure eth1 config")
+	}
+
+	configureNetwork(cliCtx)
+
+	if err := configureInteropConfig(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure interop config")
+	}
+
+	if err := configureExecutionSetting(cliCtx); err != nil {
+		return errors.Wrap(err, "could not configure execution setting")
+	}
+
+	configureFastSSZHashingAlgorithm()
+
+	return nil
+}
+
+func startBaseServices(cliCtx *cli.Context, beacon *BeaconNode, depositAddress string) (*backfill.Store, error) {
+	ctx := cliCtx.Context
+	log.Debugln("Starting DB")
+	if err := beacon.startDB(cliCtx, depositAddress); err != nil {
+		return nil, errors.Wrap(err, "could not start DB")
+	}
+	beacon.BlobStorage.WarmCache()
+
+	log.Debugln("Starting Slashing DB")
+	if err := beacon.startSlasherDB(cliCtx); err != nil {
+		return nil, errors.Wrap(err, "could not start slashing DB")
+	}
+
+	log.Debugln("Registering P2P Service")
+	if err := beacon.registerP2P(cliCtx); err != nil {
+		return nil, errors.Wrap(err, "could not register P2P service")
+	}
+
+	bfs, err := backfill.NewUpdater(ctx, beacon.db)
+	if err != nil {
+		return nil, errors.Wrap(err, "could not create backfill updater")
+	}
+
+	log.Debugln("Starting State Gen")
+	if err := beacon.startStateGen(ctx, bfs, beacon.forkChoicer); err != nil {
+		if errors.Is(err, stategen.ErrNoGenesisBlock) {
+			log.Errorf("No genesis block/state is found. Prysm only provides a mainnet genesis "+
+				"state bundled in the application. You must provide the --%s or --%s flag to load "+
+				"a genesis block/state for this network.", "genesis-state", "genesis-beacon-api-url")
+		}
+		return nil, errors.Wrap(err, "could not start state generation")
+	}
+
+	return bfs, nil
+}
+
+func registerServices(cliCtx *cli.Context, beacon *BeaconNode, synchronizer *startup.ClockSynchronizer, bf *backfill.Service, bfs *backfill.Store) error {
+	if err := beacon.services.RegisterService(bf); err != nil {
+		return errors.Wrap(err, "could not register backfill service")
+	}
+
+	log.Debugln("Registering POW Chain Service")
+	if err := beacon.registerPOWChainService(); err != nil {
+		return errors.Wrap(err, "could not register POW chain service")
+	}
+
+	log.Debugln("Registering Attestation Pool Service")
+	if err := beacon.registerAttestationPool(); err != nil {
+		return errors.Wrap(err, "could not register attestation pool service")
+	}
+
+	log.Debugln("Registering Deterministic Genesis Service")
+	if err := beacon.registerDeterministicGenesisService(); err != nil {
+		return errors.Wrap(err, "could not register deterministic genesis service")
+	}
+
+	log.Debugln("Registering Blockchain Service")
+	if err := beacon.registerBlockchainService(beacon.forkChoicer, synchronizer, beacon.initialSyncComplete); err != nil {
+		return errors.Wrap(err, "could not register blockchain service")
+	}
+
+	log.Debugln("Registering Initial Sync Service")
+	if err := beacon.registerInitialSyncService(beacon.initialSyncComplete); err != nil {
+		return errors.Wrap(err, "could not register initial sync service")
+	}
+
+	log.Debugln("Registering Sync Service")
+	if err := beacon.registerSyncService(beacon.initialSyncComplete, bfs); err != nil {
+		return errors.Wrap(err, "could not register sync service")
+	}
+
+	log.Debugln("Registering Slasher Service")
+	if err := beacon.registerSlasherService(); err != nil {
+		return errors.Wrap(err, "could not register slasher service")
+	}
+
+	log.Debugln("Registering builder service")
+	if err := beacon.registerBuilderService(cliCtx); err != nil {
+		return errors.Wrap(err, "could not register builder service")
+	}
+
+	log.Debugln("Registering RPC Service")
+	router := newRouter(cliCtx)
+	if err := beacon.registerRPCService(router); err != nil {
+		return errors.Wrap(err, "could not register RPC service")
+	}
+
+	log.Debugln("Registering GRPC Gateway Service")
+	if err := beacon.registerGRPCGateway(router); err != nil {
+		return errors.Wrap(err, "could not register GRPC gateway service")
+	}
+
+	log.Debugln("Registering Validator Monitoring Service")
+	if err := beacon.registerValidatorMonitorService(beacon.initialSyncComplete); err != nil {
+		return errors.Wrap(err, "could not register validator monitoring service")
+	}
+
+	if !cliCtx.Bool(cmd.DisableMonitoringFlag.Name) {
+		log.Debugln("Registering Prometheus Service")
+		if err := beacon.registerPrometheusService(cliCtx); err != nil {
+			return errors.Wrap(err, "could not register prometheus service")
+		}
+	}
+
+	return nil
+}
+
 func initSyncWaiter(ctx context.Context, complete chan struct{}) func() error {
 	return func() error {
 		select {
@@ -431,40 +479,86 @@ func (b *BeaconNode) Close() {
 	close(b.stop)
 }
 
+func (b *BeaconNode) clearDB(clearDB, forceClearDB bool, d *kv.Store, dbPath string) (*kv.Store, error) {
+	var err error
+	clearDBConfirmed := false
+
+	if clearDB && !forceClearDB {
+		const (
+			actionText = "This will delete your beacon chain database stored in your data directory. " +
+				"Your database backups will not be removed - do you want to proceed? (Y/N)"
+
+			deniedText = "Database will not be deleted. No changes have been made."
+		)
+
+		clearDBConfirmed, err = cmd.ConfirmAction(actionText, deniedText)
+		if err != nil {
+			return nil, errors.Wrapf(err, "could not confirm action")
+		}
+	}
+
+	if clearDBConfirmed || forceClearDB {
+		log.Warning("Removing database")
+		if err := d.ClearDB(); err != nil {
+			return nil, errors.Wrap(err, "could not clear database")
+		}
+
+		if err := b.BlobStorage.Clear(); err != nil {
+			return nil, errors.Wrap(err, "could not clear blob storage")
+		}
+
+		d, err = kv.NewKVStore(b.ctx, dbPath)
+		if err != nil {
+			return nil, errors.Wrap(err, "could not create new database")
+		}
+	}
+
+	return d, nil
+}
+
+func (b *BeaconNode) checkAndSaveDepositContract(depositAddress string) error {
+	knownContract, err := b.db.DepositContractAddress(b.ctx)
+	if err != nil {
+		return errors.Wrap(err, "could not get deposit contract address")
+	}
+
+	addr := common.HexToAddress(depositAddress)
+	if len(knownContract) == 0 {
+		if err := b.db.SaveDepositContractAddress(b.ctx, addr); err != nil {
+			return errors.Wrap(err, "could not save deposit contract")
+		}
+	}
+
+	if len(knownContract) > 0 && !bytes.Equal(addr.Bytes(), knownContract) {
+		return fmt.Errorf("database contract is %#x but tried to run with %#x. This likely means "+
+			"you are trying to run on a different network than what the database contains. You can run once with "+
+			"--%s to wipe the old database or use an alternative data directory with --%s",
+			knownContract, addr.Bytes(), cmd.ClearDB.Name, cmd.DataDirFlag.Name)
+	}
+
+	return nil
+}
+
 func (b *BeaconNode) startDB(cliCtx *cli.Context, depositAddress string) error {
+	var depositCache cache.DepositCache
+
 	baseDir := cliCtx.String(cmd.DataDirFlag.Name)
 	dbPath := filepath.Join(baseDir, kv.BeaconNodeDbDirName)
-	clearDB := cliCtx.Bool(cmd.ClearDB.Name)
-	forceClearDB := cliCtx.Bool(cmd.ForceClearDB.Name)
+	clearDBRequired := cliCtx.Bool(cmd.ClearDB.Name)
+	forceClearDBRequired := cliCtx.Bool(cmd.ForceClearDB.Name)
 
 	log.WithField("databasePath", dbPath).Info("Checking DB")
 
 	d, err := kv.NewKVStore(b.ctx, dbPath)
 	if err != nil {
-		return err
+		return errors.Wrapf(err, "could not create database at %s", dbPath)
 	}
-	clearDBConfirmed := false
-	if clearDB && !forceClearDB {
-		actionText := "This will delete your beacon chain database stored in your data directory. " +
-			"Your database backups will not be removed - do you want to proceed? (Y/N)"
-		deniedText := "Database will not be deleted. No changes have been made."
-		clearDBConfirmed, err = cmd.ConfirmAction(actionText, deniedText)
+
+	if clearDBRequired || forceClearDBRequired {
+		d, err = b.clearDB(clearDBRequired, forceClearDBRequired, d, dbPath)
 		if err != nil {
-			return err
-		}
-	}
-	if clearDBConfirmed || forceClearDB {
-		log.Warning("Removing database")
-		if err := d.ClearDB(); err != nil {
 			return errors.Wrap(err, "could not clear database")
 		}
-		if err := b.BlobStorage.Clear(); err != nil {
-			return errors.Wrap(err, "could not clear blob storage")
-		}
-		d, err = kv.NewKVStore(b.ctx, dbPath)
-		if err != nil {
-			return errors.Wrap(err, "could not create new database")
-		}
 	}
 
 	if err := d.RunMigrations(b.ctx); err != nil {
@@ -473,7 +567,6 @@ func (b *BeaconNode) startDB(cliCtx *cli.Context, depositAddress string) error {
 
 	b.db = d
 
-	var depositCache cache.DepositCache
 	if features.Get().EnableEIP4881 {
 		depositCache, err = depositsnapshot.New()
 	} else {
@@ -488,16 +581,17 @@ func (b *BeaconNode) startDB(cliCtx *cli.Context, depositAddress string) error {
 	if b.GenesisInitializer != nil {
 		if err := b.GenesisInitializer.Initialize(b.ctx, d); err != nil {
 			if err == db.ErrExistingGenesisState {
-				return errors.New("Genesis state flag specified but a genesis state " +
-					"exists already. Run again with --clear-db and/or ensure you are using the " +
-					"appropriate testnet flag to load the given genesis state.")
+				return errors.Errorf("Genesis state flag specified but a genesis state "+
+					"exists already. Run again with --%s and/or ensure you are using the "+
+					"appropriate testnet flag to load the given genesis state.", cmd.ClearDB.Name)
 			}
+
 			return errors.Wrap(err, "could not load genesis from file")
 		}
 	}
 
 	if err := b.db.EnsureEmbeddedGenesis(b.ctx); err != nil {
-		return err
+		return errors.Wrap(err, "could not ensure embedded genesis")
 	}
 
 	if b.CheckpointInitializer != nil {
@@ -506,23 +600,11 @@ func (b *BeaconNode) startDB(cliCtx *cli.Context, depositAddress string) error {
 		}
 	}
 
-	knownContract, err := b.db.DepositContractAddress(b.ctx)
-	if err != nil {
-		return err
+	if err := b.checkAndSaveDepositContract(depositAddress); err != nil {
+		return errors.Wrap(err, "could not check and save deposit contract")
 	}
-	addr := common.HexToAddress(depositAddress)
-	if len(knownContract) == 0 {
-		if err := b.db.SaveDepositContractAddress(b.ctx, addr); err != nil {
-			return errors.Wrap(err, "could not save deposit contract")
-		}
-	}
-	if len(knownContract) > 0 && !bytes.Equal(addr.Bytes(), knownContract) {
-		return fmt.Errorf("database contract is %#x but tried to run with %#x. This likely means "+
-			"you are trying to run on a different network than what the database contains. You can run once with "+
-			"'--clear-db' to wipe the old database or use an alternative data directory with '--datadir'",
-			knownContract, addr.Bytes())
-	}
-	log.Infof("Deposit contract: %#x", addr.Bytes())
+
+	log.WithField("address", depositAddress).Info("Deposit contract")
 	return nil
 }
 
@@ -610,31 +692,31 @@ func (b *BeaconNode) startStateGen(ctx context.Context, bfs coverage.AvailableBl
 func (b *BeaconNode) registerP2P(cliCtx *cli.Context) error {
 	bootstrapNodeAddrs, dataDir, err := registration.P2PPreregistration(cliCtx)
 	if err != nil {
-		return err
+		return errors.Wrapf(err, "could not register p2p service")
 	}
 
 	svc, err := p2p.NewService(b.ctx, &p2p.Config{
-		NoDiscovery:       cliCtx.Bool(cmd.NoDiscovery.Name),
-		StaticPeers:       slice.SplitCommaSeparated(cliCtx.StringSlice(cmd.StaticPeers.Name)),
-		BootstrapNodeAddr: bootstrapNodeAddrs,
-		RelayNodeAddr:     cliCtx.String(cmd.RelayNode.Name),
-		DataDir:           dataDir,
-		LocalIP:           cliCtx.String(cmd.P2PIP.Name),
-		HostAddress:       cliCtx.String(cmd.P2PHost.Name),
-		HostDNS:           cliCtx.String(cmd.P2PHostDNS.Name),
-		PrivateKey:        cliCtx.String(cmd.P2PPrivKey.Name),
-		StaticPeerID:      cliCtx.Bool(cmd.P2PStaticID.Name),
-		MetaDataDir:       cliCtx.String(cmd.P2PMetadata.Name),
-		TCPPort:           cliCtx.Uint(cmd.P2PTCPPort.Name),
-		UDPPort:           cliCtx.Uint(cmd.P2PUDPPort.Name),
-		MaxPeers:          cliCtx.Uint(cmd.P2PMaxPeers.Name),
-		QueueSize:         cliCtx.Uint(cmd.PubsubQueueSize.Name),
-		AllowListCIDR:     cliCtx.String(cmd.P2PAllowList.Name),
-		DenyListCIDR:      slice.SplitCommaSeparated(cliCtx.StringSlice(cmd.P2PDenyList.Name)),
-		EnableUPnP:        cliCtx.Bool(cmd.EnableUPnPFlag.Name),
-		StateNotifier:     b,
-		DB:                b.db,
-		ClockWaiter:       b.clockWaiter,
+		NoDiscovery:          cliCtx.Bool(cmd.NoDiscovery.Name),
+		StaticPeers:          slice.SplitCommaSeparated(cliCtx.StringSlice(cmd.StaticPeers.Name)),
+		Discv5BootStrapAddrs: p2p.ParseBootStrapAddrs(bootstrapNodeAddrs),
+		RelayNodeAddr:        cliCtx.String(cmd.RelayNode.Name),
+		DataDir:              dataDir,
+		LocalIP:              cliCtx.String(cmd.P2PIP.Name),
+		HostAddress:          cliCtx.String(cmd.P2PHost.Name),
+		HostDNS:              cliCtx.String(cmd.P2PHostDNS.Name),
+		PrivateKey:           cliCtx.String(cmd.P2PPrivKey.Name),
+		StaticPeerID:         cliCtx.Bool(cmd.P2PStaticID.Name),
+		MetaDataDir:          cliCtx.String(cmd.P2PMetadata.Name),
+		TCPPort:              cliCtx.Uint(cmd.P2PTCPPort.Name),
+		UDPPort:              cliCtx.Uint(cmd.P2PUDPPort.Name),
+		MaxPeers:             cliCtx.Uint(cmd.P2PMaxPeers.Name),
+		QueueSize:            cliCtx.Uint(cmd.PubsubQueueSize.Name),
+		AllowListCIDR:        cliCtx.String(cmd.P2PAllowList.Name),
+		DenyListCIDR:         slice.SplitCommaSeparated(cliCtx.StringSlice(cmd.P2PDenyList.Name)),
+		EnableUPnP:           cliCtx.Bool(cmd.EnableUPnPFlag.Name),
+		StateNotifier:        b,
+		DB:                   b.db,
+		ClockWaiter:          b.clockWaiter,
 	})
 	if err != nil {
 		return err
@@ -976,11 +1058,13 @@ func (b *BeaconNode) registerGRPCGateway(router *mux.Router) error {
 	if b.cliCtx.Bool(flags.DisableGRPCGateway.Name) {
 		return nil
 	}
-	gatewayPort := b.cliCtx.Int(flags.GRPCGatewayPort.Name)
 	gatewayHost := b.cliCtx.String(flags.GRPCGatewayHost.Name)
+	gatewayPort := b.cliCtx.Int(flags.GRPCGatewayPort.Name)
 	rpcHost := b.cliCtx.String(flags.RPCHost.Name)
-	selfAddress := fmt.Sprintf("%s:%d", rpcHost, b.cliCtx.Int(flags.RPCPort.Name))
-	gatewayAddress := fmt.Sprintf("%s:%d", gatewayHost, gatewayPort)
+	rpcPort := b.cliCtx.Int(flags.RPCPort.Name)
+
+	selfAddress := net.JoinHostPort(rpcHost, strconv.Itoa(rpcPort))
+	gatewayAddress := net.JoinHostPort(gatewayHost, strconv.Itoa(gatewayPort))
 	allowedOrigins := strings.Split(b.cliCtx.String(flags.GPRCGatewayCorsDomain.Name), ",")
 	enableDebugRPCEndpoints := b.cliCtx.Bool(flags.EnableDebugRPCEndpoints.Name)
 	selfCert := b.cliCtx.String(flags.CertFlag.Name)
@@ -1074,9 +1158,9 @@ func (b *BeaconNode) registerBuilderService(cliCtx *cli.Context) error {
 		return err
 	}
 
-	opts := append(b.serviceFlagOpts.builderOpts,
-		builder.WithHeadFetcher(chainService),
-		builder.WithDatabase(b.db))
+	opts := b.serviceFlagOpts.builderOpts
+	opts = append(opts, builder.WithHeadFetcher(chainService), builder.WithDatabase(b.db))
+
 	// make cache the default.
 	if !cliCtx.Bool(features.DisableRegistrationCache.Name) {
 		opts = append(opts, builder.WithRegistrationCache())

beacon-chain/node/registration/BUILD.bazel

@@ -11,6 +11,7 @@ go_library(
     deps = [
         "//cmd:go_default_library",
         "//config/params:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
         "@com_github_urfave_cli_v2//:go_default_library",
         "@in_gopkg_yaml_v2//:go_default_library",

beacon-chain/node/registration/p2p.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/cmd"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/urfave/cli/v2"
@@ -31,9 +32,9 @@ func P2PPreregistration(cliCtx *cli.Context) (bootstrapNodeAddrs []string, dataD
 	if dataDir == "" {
 		dataDir = cmd.DefaultDataDir()
 		if dataDir == "" {
-			log.Fatal(
-				"Could not determine your system's HOME path, please specify a --datadir you wish " +
-					"to use for your chain data",
+			err = errors.Errorf(
+				"Could not determine your system's HOME path, please specify a --%s you wish to use for your chain data",
+				cmd.DataDirFlag.Name,
 			)
 		}
 	}

beacon-chain/operations/attestations/BUILD.bazel

@@ -49,6 +49,7 @@ go_test(
         "//beacon-chain/operations/attestations/kv:go_default_library",
         "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
+        "//consensus-types/primitives:go_default_library",
         "//crypto/bls:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
         "//proto/prysm/v1alpha1/attestation/aggregation/attestations:go_default_library",

beacon-chain/operations/attestations/prune_expired.go

@@ -6,6 +6,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	prysmTime "github.com/prysmaticlabs/prysm/v5/time"
+	"github.com/prysmaticlabs/prysm/v5/time/slots"
 )
 
 // pruneAttsPool prunes attestations pool on every slot interval.
@@ -66,7 +67,18 @@ func (s *Service) pruneExpiredAtts() {
 
 // Return true if the input slot has been expired.
 // Expired is defined as one epoch behind than current time.
-func (s *Service) expired(slot primitives.Slot) bool {
+func (s *Service) expired(providedSlot primitives.Slot) bool {
+	providedEpoch := slots.ToEpoch(providedSlot)
+	currSlot := slots.CurrentSlot(s.genesisTime)
+	currEpoch := slots.ToEpoch(currSlot)
+	if currEpoch < params.BeaconConfig().DenebForkEpoch {
+		return s.expiredPreDeneb(providedSlot)
+	}
+	return providedEpoch+1 < currEpoch
+}
+
+// Handles expiration of attestations before deneb.
+func (s *Service) expiredPreDeneb(slot primitives.Slot) bool {
 	expirationSlot := slot + params.BeaconConfig().SlotsPerEpoch
 	expirationTime := s.genesisTime + uint64(expirationSlot.Mul(params.BeaconConfig().SecondsPerSlot))
 	currentTime := uint64(prysmTime.Now().Unix())

beacon-chain/operations/attestations/prune_expired_test.go

@@ -9,6 +9,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/async"
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/testing/assert"
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
@@ -127,3 +128,22 @@ func TestPruneExpired_Expired(t *testing.T) {
 	assert.Equal(t, true, s.expired(0), "Should be expired")
 	assert.Equal(t, false, s.expired(1), "Should not be expired")
 }
+
+func TestPruneExpired_ExpiredDeneb(t *testing.T) {
+	params.SetupTestConfigCleanup(t)
+	cfg := params.BeaconConfig()
+	cfg.DenebForkEpoch = 3
+	params.OverrideBeaconConfig(cfg)
+
+	s, err := NewService(context.Background(), &Config{Pool: NewPool()})
+	require.NoError(t, err)
+
+	// Rewind back 4 epochs + 10 slots worth of time.
+	s.genesisTime = uint64(prysmTime.Now().Unix()) - (4*uint64(params.BeaconConfig().SlotsPerEpoch.Mul(params.BeaconConfig().SecondsPerSlot)) + 10)
+	secondEpochStart := primitives.Slot(2 * uint64(params.BeaconConfig().SlotsPerEpoch))
+	thirdEpochStart := primitives.Slot(3 * uint64(params.BeaconConfig().SlotsPerEpoch))
+
+	assert.Equal(t, true, s.expired(secondEpochStart), "Should be expired")
+	assert.Equal(t, false, s.expired(thirdEpochStart), "Should not be expired")
+
+}

beacon-chain/p2p/BUILD.bazel

@@ -94,6 +94,7 @@ go_library(
         "@com_github_libp2p_go_libp2p_mplex//:go_default_library",
         "@com_github_libp2p_go_libp2p_pubsub//:go_default_library",
         "@com_github_libp2p_go_libp2p_pubsub//pb:go_default_library",
+        "@com_github_libp2p_go_mplex//:go_default_library",
         "@com_github_multiformats_go_multiaddr//:go_default_library",
         "@com_github_multiformats_go_multiaddr//net:go_default_library",
         "@com_github_pkg_errors//:go_default_library",

beacon-chain/p2p/broadcaster.go

@@ -15,6 +15,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/monitoring/tracing"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
+	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 	"google.golang.org/protobuf/proto"
 )
@@ -68,7 +69,7 @@ func (s *Service) BroadcastAttestation(ctx context.Context, subnet uint64, att *
 	}
 
 	// Non-blocking broadcast, with attempts to discover a subnet peer if none available.
-	go s.broadcastAttestation(ctx, subnet, att, forkDigest)
+	go s.internalBroadcastAttestation(ctx, subnet, att, forkDigest)
 
 	return nil
 }
@@ -94,8 +95,8 @@ func (s *Service) BroadcastSyncCommitteeMessage(ctx context.Context, subnet uint
 	return nil
 }
 
-func (s *Service) broadcastAttestation(ctx context.Context, subnet uint64, att *ethpb.Attestation, forkDigest [4]byte) {
-	_, span := trace.StartSpan(ctx, "p2p.broadcastAttestation")
+func (s *Service) internalBroadcastAttestation(ctx context.Context, subnet uint64, att *ethpb.Attestation, forkDigest [4]byte) {
+	_, span := trace.StartSpan(ctx, "p2p.internalBroadcastAttestation")
 	defer span.End()
 	ctx = trace.NewContext(context.Background(), span) // clear parent context / deadline.
 
@@ -137,7 +138,10 @@ func (s *Service) broadcastAttestation(ctx context.Context, subnet uint64, att *
 	// acceptable threshold, we exit early and do not broadcast it.
 	currSlot := slots.CurrentSlot(uint64(s.genesisTime.Unix()))
 	if att.Data.Slot+params.BeaconConfig().SlotsPerEpoch < currSlot {
-		log.Warnf("Attestation is too old to broadcast, discarding it. Current Slot: %d , Attestation Slot: %d", currSlot, att.Data.Slot)
+		log.WithFields(logrus.Fields{
+			"attestationSlot": att.Data.Slot,
+			"currentSlot":     currSlot,
+		}).Warning("Attestation is too old to broadcast, discarding it")
 		return
 	}
 
@@ -218,13 +222,13 @@ func (s *Service) BroadcastBlob(ctx context.Context, subnet uint64, blob *ethpb.
 	}
 
 	// Non-blocking broadcast, with attempts to discover a subnet peer if none available.
-	go s.broadcastBlob(ctx, subnet, blob, forkDigest)
+	go s.internalBroadcastBlob(ctx, subnet, blob, forkDigest)
 
 	return nil
 }
 
-func (s *Service) broadcastBlob(ctx context.Context, subnet uint64, blobSidecar *ethpb.BlobSidecar, forkDigest [4]byte) {
-	_, span := trace.StartSpan(ctx, "p2p.broadcastBlob")
+func (s *Service) internalBroadcastBlob(ctx context.Context, subnet uint64, blobSidecar *ethpb.BlobSidecar, forkDigest [4]byte) {
+	_, span := trace.StartSpan(ctx, "p2p.internalBroadcastBlob")
 	defer span.End()
 	ctx = trace.NewContext(context.Background(), span) // clear parent context / deadline.
 

beacon-chain/p2p/broadcaster_test.go

@@ -240,9 +240,8 @@ func TestService_BroadcastAttestationWithDiscoveryAttempts(t *testing.T) {
 	var hosts []host.Host
 	// setup other nodes.
 	cfg = &Config{
-		BootstrapNodeAddr:   []string{bootNode.String()},
-		Discv5BootStrapAddr: []string{bootNode.String()},
-		MaxPeers:            30,
+		Discv5BootStrapAddrs: []string{bootNode.String()},
+		MaxPeers:             30,
 	}
 	// Setup 2 different hosts
 	for i := 1; i <= 2; i++ {

beacon-chain/p2p/config.go

@@ -12,28 +12,27 @@ const defaultPubsubQueueSize = 600
 // Config for the p2p service. These parameters are set from application level flags
 // to initialize the p2p service.
 type Config struct {
-	NoDiscovery         bool
-	EnableUPnP          bool
-	StaticPeerID        bool
-	StaticPeers         []string
-	BootstrapNodeAddr   []string
-	Discv5BootStrapAddr []string
-	RelayNodeAddr       string
-	LocalIP             string
-	HostAddress         string
-	HostDNS             string
-	PrivateKey          string
-	DataDir             string
-	MetaDataDir         string
-	TCPPort             uint
-	UDPPort             uint
-	MaxPeers            uint
-	QueueSize           uint
-	AllowListCIDR       string
-	DenyListCIDR        []string
-	StateNotifier       statefeed.Notifier
-	DB                  db.ReadOnlyDatabase
-	ClockWaiter         startup.ClockWaiter
+	NoDiscovery          bool
+	EnableUPnP           bool
+	StaticPeerID         bool
+	StaticPeers          []string
+	Discv5BootStrapAddrs []string
+	RelayNodeAddr        string
+	LocalIP              string
+	HostAddress          string
+	HostDNS              string
+	PrivateKey           string
+	DataDir              string
+	MetaDataDir          string
+	TCPPort              uint
+	UDPPort              uint
+	MaxPeers             uint
+	QueueSize            uint
+	AllowListCIDR        string
+	DenyListCIDR         []string
+	StateNotifier        statefeed.Notifier
+	DB                   db.ReadOnlyDatabase
+	ClockWaiter          startup.ClockWaiter
 }
 
 // validateConfig validates whether the values provided are accurate and will set

beacon-chain/p2p/connection_gater.go

@@ -25,7 +25,7 @@ const (
 )
 
 // InterceptPeerDial tests whether we're permitted to Dial the specified peer.
-func (_ *Service) InterceptPeerDial(_ peer.ID) (allow bool) {
+func (*Service) InterceptPeerDial(_ peer.ID) (allow bool) {
 	return true
 }
 
@@ -63,12 +63,12 @@ func (s *Service) InterceptAccept(n network.ConnMultiaddrs) (allow bool) {
 
 // InterceptSecured tests whether a given connection, now authenticated,
 // is allowed.
-func (_ *Service) InterceptSecured(_ network.Direction, _ peer.ID, _ network.ConnMultiaddrs) (allow bool) {
+func (*Service) InterceptSecured(_ network.Direction, _ peer.ID, _ network.ConnMultiaddrs) (allow bool) {
 	return true
 }
 
 // InterceptUpgraded tests whether a fully capable connection is allowed.
-func (_ *Service) InterceptUpgraded(_ network.Conn) (allow bool, reason control.DisconnectReason) {
+func (*Service) InterceptUpgraded(_ network.Conn) (allow bool, reason control.DisconnectReason) {
 	return true, 0
 }
 

beacon-chain/p2p/discovery.go

@@ -34,6 +34,11 @@ type Listener interface {
 	LocalNode() *enode.LocalNode
 }
 
+const (
+	udp4 = iota
+	udp6
+)
+
 // RefreshENR uses an epoch to refresh the enr entry for our node
 // with the tracked committee ids for the epoch, allowing our node
 // to be dynamically discoverable by others given our tracked committee ids.
@@ -62,8 +67,14 @@ func (s *Service) RefreshENR() {
 	// Compare current epoch with our fork epochs
 	altairForkEpoch := params.BeaconConfig().AltairForkEpoch
 	switch {
-	// Altair Behaviour
-	case currEpoch >= altairForkEpoch:
+	case currEpoch < altairForkEpoch:
+		// Phase 0 behaviour.
+		if bytes.Equal(bitV, currentBitV) {
+			// return early if bitfield hasn't changed
+			return
+		}
+		s.updateSubnetRecordWithMetadata(bitV)
+	default:
 		// Retrieve sync subnets from application level
 		// cache.
 		bitS := bitfield.Bitvector4{byte(0x00)}
@@ -82,13 +93,6 @@ func (s *Service) RefreshENR() {
 			return
 		}
 		s.updateSubnetRecordWithMetadataV2(bitV, bitS)
-	default:
-		// Phase 0 behaviour.
-		if bytes.Equal(bitV, currentBitV) {
-			// return early if bitfield hasn't changed
-			return
-		}
-		s.updateSubnetRecordWithMetadata(bitV)
 	}
 	// ping all peers to inform them of new metadata
 	s.pingPeers()
@@ -140,9 +144,9 @@ func (s *Service) createListener(
 	// by default we will listen to all interfaces.
 	var bindIP net.IP
 	switch udpVersionFromIP(ipAddr) {
-	case "udp4":
+	case udp4:
 		bindIP = net.IPv4zero
-	case "udp6":
+	case udp6:
 		bindIP = net.IPv6zero
 	default:
 		return nil, errors.New("invalid ip provided")
@@ -160,6 +164,7 @@ func (s *Service) createListener(
 		IP:   bindIP,
 		Port: int(s.cfg.UDPPort),
 	}
+
 	// Listen to all network interfaces
 	// for both ip protocols.
 	networkVersion := "udp"
@@ -177,44 +182,27 @@ func (s *Service) createListener(
 	if err != nil {
 		return nil, errors.Wrap(err, "could not create local node")
 	}
-	if s.cfg.HostAddress != "" {
-		hostIP := net.ParseIP(s.cfg.HostAddress)
-		if hostIP.To4() == nil && hostIP.To16() == nil {
-			log.Errorf("Invalid host address given: %s", hostIP.String())
-		} else {
-			localNode.SetFallbackIP(hostIP)
-			localNode.SetStaticIP(hostIP)
-		}
-	}
-	if s.cfg.HostDNS != "" {
-		host := s.cfg.HostDNS
-		ips, err := net.LookupIP(host)
-		if err != nil {
-			return nil, errors.Wrap(err, "could not resolve host address")
-		}
-		if len(ips) > 0 {
-			// Use first IP returned from the
-			// resolver.
-			firstIP := ips[0]
-			localNode.SetFallbackIP(firstIP)
-		}
-	}
-	dv5Cfg := discover.Config{
-		PrivateKey: privKey,
-	}
-	dv5Cfg.Bootnodes = []*enode.Node{}
-	for _, addr := range s.cfg.Discv5BootStrapAddr {
+
+	bootNodes := make([]*enode.Node, 0, len(s.cfg.Discv5BootStrapAddrs))
+	for _, addr := range s.cfg.Discv5BootStrapAddrs {
 		bootNode, err := enode.Parse(enode.ValidSchemes, addr)
 		if err != nil {
 			return nil, errors.Wrap(err, "could not bootstrap addr")
 		}
-		dv5Cfg.Bootnodes = append(dv5Cfg.Bootnodes, bootNode)
+
+		bootNodes = append(bootNodes, bootNode)
+	}
+
+	dv5Cfg := discover.Config{
+		PrivateKey: privKey,
+		Bootnodes:  bootNodes,
 	}
 
 	listener, err := discover.ListenV5(conn, localNode, dv5Cfg)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not listen to discV5")
 	}
+
 	return listener, nil
 }
 
@@ -242,8 +230,35 @@ func (s *Service) createLocalNode(
 	if err != nil {
 		return nil, errors.Wrap(err, "could not add eth2 fork version entry to enr")
 	}
+
 	localNode = initializeAttSubnets(localNode)
-	return initializeSyncCommSubnets(localNode), nil
+	localNode = initializeSyncCommSubnets(localNode)
+
+	if s.cfg != nil && s.cfg.HostAddress != "" {
+		hostIP := net.ParseIP(s.cfg.HostAddress)
+		if hostIP.To4() == nil && hostIP.To16() == nil {
+			return nil, errors.Errorf("invalid host address: %s", s.cfg.HostAddress)
+		} else {
+			localNode.SetFallbackIP(hostIP)
+			localNode.SetStaticIP(hostIP)
+		}
+	}
+
+	if s.cfg != nil && s.cfg.HostDNS != "" {
+		host := s.cfg.HostDNS
+		ips, err := net.LookupIP(host)
+		if err != nil {
+			return nil, errors.Wrapf(err, "could not resolve host address: %s", host)
+		}
+		if len(ips) > 0 {
+			// Use first IP returned from the
+			// resolver.
+			firstIP := ips[0]
+			localNode.SetFallbackIP(firstIP)
+		}
+	}
+
+	return localNode, nil
 }
 
 func (s *Service) startDiscoveryV5(
@@ -262,58 +277,69 @@ func (s *Service) startDiscoveryV5(
 // filterPeer validates each node that we retrieve from our dht. We
 // try to ascertain that the peer can be a valid protocol peer.
 // Validity Conditions:
-//  1. The local node is still actively looking for peers to
-//     connect to.
-//  2. Peer has a valid IP and TCP port set in their enr.
-//  3. Peer hasn't been marked as 'bad'
-//  4. Peer is not currently active or connected.
-//  5. Peer is ready to receive incoming connections.
-//  6. Peer's fork digest in their ENR matches that of
+//  1. Peer has a valid IP and TCP port set in their enr.
+//  2. Peer hasn't been marked as 'bad'.
+//  3. Peer is not currently active or connected.
+//  4. Peer is ready to receive incoming connections.
+//  5. Peer's fork digest in their ENR matches that of
 //     our localnodes.
 func (s *Service) filterPeer(node *enode.Node) bool {
 	// Ignore nil node entries passed in.
 	if node == nil {
 		return false
 	}
-	// ignore nodes with no ip address stored.
+
+	// Ignore nodes with no IP address stored.
 	if node.IP() == nil {
 		return false
 	}
-	// do not dial nodes with their tcp ports not set
+
+	// Ignore nodes with their TCP ports not set.
 	if err := node.Record().Load(enr.WithEntry("tcp", new(enr.TCP))); err != nil {
 		if !enr.IsNotFound(err) {
 			log.WithError(err).Debug("Could not retrieve tcp port")
 		}
 		return false
 	}
+
 	peerData, multiAddr, err := convertToAddrInfo(node)
 	if err != nil {
 		log.WithError(err).Debug("Could not convert to peer data")
 		return false
 	}
+
+	// Ignore bad nodes.
 	if s.peers.IsBad(peerData.ID) {
 		return false
 	}
+
+	// Ignore nodes that are already active.
 	if s.peers.IsActive(peerData.ID) {
 		return false
 	}
+
+	// Ignore nodes that are already connected.
 	if s.host.Network().Connectedness(peerData.ID) == network.Connected {
 		return false
 	}
+
+	// Ignore nodes that are not ready to receive incoming connections.
 	if !s.peers.IsReadyToDial(peerData.ID) {
 		return false
 	}
+
+	// Ignore nodes that don't match our fork digest.
 	nodeENR := node.Record()
-	// Decide whether or not to connect to peer that does not
-	// match the proper fork ENR data with our local node.
 	if s.genesisValidatorsRoot != nil {
 		if err := s.compareForkENR(nodeENR); err != nil {
 			log.WithError(err).Trace("Fork ENR mismatches between peer and local node")
 			return false
 		}
 	}
+
 	// Add peer to peer handler.
 	s.peers.Add(nodeENR, peerData.ID, multiAddr, network.DirUnknown)
+
 	return true
 }
 
@@ -363,7 +389,7 @@ func PeersFromStringAddrs(addrs []string) ([]ma.Multiaddr, error) {
 	return allAddrs, nil
 }
 
-func parseBootStrapAddrs(addrs []string) (discv5Nodes []string) {
+func ParseBootStrapAddrs(addrs []string) (discv5Nodes []string) {
 	discv5Nodes, _ = parseGenericAddrs(addrs)
 	if len(discv5Nodes) == 0 {
 		log.Warn("No bootstrap addresses supplied")
@@ -483,9 +509,9 @@ func multiAddrFromString(address string) (ma.Multiaddr, error) {
 	return ma.NewMultiaddr(address)
 }
 
-func udpVersionFromIP(ipAddr net.IP) string {
+func udpVersionFromIP(ipAddr net.IP) int {
 	if ipAddr.To4() != nil {
-		return "udp4"
+		return udp4
 	}
-	return "udp6"
+	return udp6
 }

beacon-chain/p2p/discovery_test.go

@@ -42,10 +42,6 @@ import (
 
 var discoveryWaitTime = 1 * time.Second
 
-func init() {
-	rand.Seed(time.Now().Unix())
-}
-
 func createAddrAndPrivKey(t *testing.T) (net.IP, *ecdsa.PrivateKey) {
 	ip, err := prysmNetwork.ExternalIPv4()
 	require.NoError(t, err, "Could not get ip")
@@ -103,8 +99,8 @@ func TestStartDiscV5_DiscoverAllPeers(t *testing.T) {
 	for i := 1; i <= 5; i++ {
 		port = 3000 + i
 		cfg := &Config{
-			Discv5BootStrapAddr: []string{bootNode.String()},
-			UDPPort:             uint(port),
+			Discv5BootStrapAddrs: []string{bootNode.String()},
+			UDPPort:              uint(port),
 		}
 		ipAddr, pkey := createAddrAndPrivKey(t)
 		s = &Service{
@@ -134,6 +130,106 @@ func TestStartDiscV5_DiscoverAllPeers(t *testing.T) {
 	}
 }
 
+func TestCreateLocalNode(t *testing.T) {
+	testCases := []struct {
+		name          string
+		cfg           *Config
+		expectedError bool
+	}{
+		{
+			name:          "valid config",
+			cfg:           nil,
+			expectedError: false,
+		},
+		{
+			name:          "invalid host address",
+			cfg:           &Config{HostAddress: "invalid"},
+			expectedError: true,
+		},
+		{
+			name:          "valid host address",
+			cfg:           &Config{HostAddress: "192.168.0.1"},
+			expectedError: false,
+		},
+		{
+			name:          "invalid host DNS",
+			cfg:           &Config{HostDNS: "invalid"},
+			expectedError: true,
+		},
+		{
+			name:          "valid host DNS",
+			cfg:           &Config{HostDNS: "www.google.com"},
+			expectedError: false,
+		},
+	}
+	for _, tt := range testCases {
+		t.Run(tt.name, func(t *testing.T) {
+			// Define ports.
+			const (
+				udpPort = 2000
+				tcpPort = 3000
+			)
+
+			// Create a private key.
+			address, privKey := createAddrAndPrivKey(t)
+
+			// Create a service.
+			service := &Service{
+				genesisTime:           time.Now(),
+				genesisValidatorsRoot: bytesutil.PadTo([]byte{'A'}, 32),
+				cfg:                   tt.cfg,
+			}
+
+			localNode, err := service.createLocalNode(privKey, address, udpPort, tcpPort)
+			if tt.expectedError {
+				require.NotNil(t, err)
+				return
+			}
+
+			require.NoError(t, err)
+
+			expectedAddress := address
+			if tt.cfg != nil && tt.cfg.HostAddress != "" {
+				expectedAddress = net.ParseIP(tt.cfg.HostAddress)
+			}
+
+			// Check IP.
+			// IP is not checked int case of DNS, since it can be resolved to different IPs.
+			if tt.cfg == nil || tt.cfg.HostDNS == "" {
+				ip := new(net.IP)
+				require.NoError(t, localNode.Node().Record().Load(enr.WithEntry("ip", ip)))
+				require.Equal(t, true, ip.Equal(expectedAddress))
+				require.Equal(t, true, localNode.Node().IP().Equal(expectedAddress))
+			}
+
+			// Check UDP.
+			udp := new(uint16)
+			require.NoError(t, localNode.Node().Record().Load(enr.WithEntry("udp", udp)))
+			require.Equal(t, udpPort, localNode.Node().UDP())
+
+			// Check TCP.
+			tcp := new(uint16)
+			require.NoError(t, localNode.Node().Record().Load(enr.WithEntry("tcp", tcp)))
+			require.Equal(t, tcpPort, localNode.Node().TCP())
+
+			// Check fork is set.
+			fork := new([]byte)
+			require.NoError(t, localNode.Node().Record().Load(enr.WithEntry(eth2ENRKey, fork)))
+			require.NotEmpty(t, *fork)
+
+			// Check att subnets.
+			attSubnets := new([]byte)
+			require.NoError(t, localNode.Node().Record().Load(enr.WithEntry(attSubnetEnrKey, attSubnets)))
+			require.DeepSSZEqual(t, []byte{0, 0, 0, 0, 0, 0, 0, 0}, *attSubnets)
+
+			// Check sync committees subnets.
+			syncSubnets := new([]byte)
+			require.NoError(t, localNode.Node().Record().Load(enr.WithEntry(syncCommsSubnetEnrKey, syncSubnets)))
+			require.DeepSSZEqual(t, []byte{0}, *syncSubnets)
+		})
+	}
+}
+
 func TestMultiAddrsConversion_InvalidIPAddr(t *testing.T) {
 	addr := net.ParseIP("invalidIP")
 	_, pkey := createAddrAndPrivKey(t)
@@ -310,12 +406,12 @@ func TestMultipleDiscoveryAddresses(t *testing.T) {
 }
 
 func TestCorrectUDPVersion(t *testing.T) {
-	assert.Equal(t, "udp4", udpVersionFromIP(net.IPv4zero), "incorrect network version")
-	assert.Equal(t, "udp6", udpVersionFromIP(net.IPv6zero), "incorrect network version")
-	assert.Equal(t, "udp4", udpVersionFromIP(net.IP{200, 20, 12, 255}), "incorrect network version")
-	assert.Equal(t, "udp6", udpVersionFromIP(net.IP{22, 23, 24, 251, 17, 18, 0, 0, 0, 0, 12, 14, 212, 213, 16, 22}), "incorrect network version")
+	assert.Equal(t, udp4, udpVersionFromIP(net.IPv4zero), "incorrect network version")
+	assert.Equal(t, udp6, udpVersionFromIP(net.IPv6zero), "incorrect network version")
+	assert.Equal(t, udp4, udpVersionFromIP(net.IP{200, 20, 12, 255}), "incorrect network version")
+	assert.Equal(t, udp6, udpVersionFromIP(net.IP{22, 23, 24, 251, 17, 18, 0, 0, 0, 0, 12, 14, 212, 213, 16, 22}), "incorrect network version")
 	// v4 in v6
-	assert.Equal(t, "udp4", udpVersionFromIP(net.IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 212, 213, 16, 22}), "incorrect network version")
+	assert.Equal(t, udp4, udpVersionFromIP(net.IP{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0xff, 0xff, 212, 213, 16, 22}), "incorrect network version")
 }
 
 // addPeer is a helper to add a peer with a given connection state)

beacon-chain/p2p/fork_test.go

@@ -46,9 +46,9 @@ func TestStartDiscv5_DifferentForkDigests(t *testing.T) {
 
 	bootNode := bootListener.Self()
 	cfg := &Config{
-		Discv5BootStrapAddr: []string{bootNode.String()},
-		UDPPort:             uint(port),
-		StateNotifier:       &mock.MockStateNotifier{},
+		Discv5BootStrapAddrs: []string{bootNode.String()},
+		UDPPort:              uint(port),
+		StateNotifier:        &mock.MockStateNotifier{},
 	}
 
 	var listeners []*discover.UDPv5
@@ -132,8 +132,8 @@ func TestStartDiscv5_SameForkDigests_DifferentNextForkData(t *testing.T) {
 
 	bootNode := bootListener.Self()
 	cfg := &Config{
-		Discv5BootStrapAddr: []string{bootNode.String()},
-		UDPPort:             uint(port),
+		Discv5BootStrapAddrs: []string{bootNode.String()},
+		UDPPort:              uint(port),
 	}
 
 	var listeners []*discover.UDPv5

beacon-chain/p2p/info.go

@@ -20,7 +20,7 @@ self=%s
 %d peers
 %v
 `,
-		s.cfg.BootstrapNodeAddr,
+		s.cfg.Discv5BootStrapAddrs,
 		s.selfAddresses(),
 		len(s.host.Network().Peers()),
 		formatPeers(s.host), // Must be last. Writes one entry per row.

beacon-chain/p2p/options.go

@@ -4,6 +4,7 @@ import (
 	"crypto/ecdsa"
 	"fmt"
 	"net"
+	"time"
 
 	"github.com/libp2p/go-libp2p"
 	mplex "github.com/libp2p/go-libp2p-mplex"
@@ -11,6 +12,7 @@ import (
 	"github.com/libp2p/go-libp2p/core/peer"
 	"github.com/libp2p/go-libp2p/p2p/security/noise"
 	"github.com/libp2p/go-libp2p/p2p/transport/tcp"
+	gomplex "github.com/libp2p/go-mplex"
 	ma "github.com/multiformats/go-multiaddr"
 	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/config/features"
@@ -31,29 +33,31 @@ func MultiAddressBuilder(ipAddr string, port uint) (ma.Multiaddr, error) {
 }
 
 // buildOptions for the libp2p host.
-func (s *Service) buildOptions(ip net.IP, priKey *ecdsa.PrivateKey) []libp2p.Option {
+func (s *Service) buildOptions(ip net.IP, priKey *ecdsa.PrivateKey) ([]libp2p.Option, error) {
 	cfg := s.cfg
 	listen, err := MultiAddressBuilder(ip.String(), cfg.TCPPort)
 	if err != nil {
-		log.WithError(err).Fatal("Failed to p2p listen")
+		return nil, errors.Wrapf(err, "cannot produce multiaddr format from %s:%d", ip.String(), cfg.TCPPort)
 	}
 	if cfg.LocalIP != "" {
 		if net.ParseIP(cfg.LocalIP) == nil {
-			log.Fatalf("Invalid local ip provided: %s", cfg.LocalIP)
+			return nil, errors.Wrapf(err, "invalid local ip provided: %s:%d", cfg.LocalIP, cfg.TCPPort)
 		}
+
 		listen, err = MultiAddressBuilder(cfg.LocalIP, cfg.TCPPort)
 		if err != nil {
-			log.WithError(err).Fatal("Failed to p2p listen")
+			return nil, errors.Wrapf(err, "cannot produce multiaddr format from %s:%d", cfg.LocalIP, cfg.TCPPort)
 		}
 	}
 	ifaceKey, err := ecdsaprysm.ConvertToInterfacePrivkey(priKey)
 	if err != nil {
-		log.WithError(err).Fatal("Failed to retrieve private key")
+		return nil, errors.Wrap(err, "cannot convert private key to interface private key. (Private key not displayed in logs for security reasons)")
 	}
 	id, err := peer.IDFromPublicKey(ifaceKey.GetPublic())
 	if err != nil {
-		log.WithError(err).Fatal("Failed to retrieve peer id")
+		return nil, errors.Wrapf(err, "cannot get ID from public key: %s", ifaceKey.GetPublic().Type().String())
 	}
+
 	log.Infof("Running node with peer id of %s ", id.String())
 
 	options := []libp2p.Option{
@@ -64,10 +68,10 @@ func (s *Service) buildOptions(ip net.IP, priKey *ecdsa.PrivateKey) []libp2p.Opt
 		libp2p.Transport(tcp.NewTCPTransport),
 		libp2p.DefaultMuxers,
 		libp2p.Muxer("/mplex/6.7.0", mplex.DefaultTransport),
+		libp2p.Security(noise.ID, noise.New),
+		libp2p.Ping(false), // Disable Ping Service.
 	}
 
-	options = append(options, libp2p.Security(noise.ID, noise.New))
-
 	if cfg.EnableUPnP {
 		options = append(options, libp2p.NATPortMap()) // Allow to use UPnP
 	}
@@ -99,12 +103,11 @@ func (s *Service) buildOptions(ip net.IP, priKey *ecdsa.PrivateKey) []libp2p.Opt
 			return addrs
 		}))
 	}
-	// Disable Ping Service.
-	options = append(options, libp2p.Ping(false))
+
 	if features.Get().DisableResourceManager {
 		options = append(options, libp2p.ResourceManager(&network.NullResourceManager{}))
 	}
-	return options
+	return options, nil
 }
 
 func multiAddressBuilderWithID(ipAddr, protocol string, port uint, id peer.ID) (ma.Multiaddr, error) {
@@ -134,3 +137,8 @@ func privKeyOption(privkey *ecdsa.PrivateKey) libp2p.Option {
 		return cfg.Apply(libp2p.Identity(ifaceKey))
 	}
 }
+
+// Configures stream timeouts on mplex.
+func configureMplex() {
+	gomplex.ResetStreamTimeout = 5 * time.Second
+}

beacon-chain/p2p/options_test.go

@@ -119,7 +119,9 @@ func TestDefaultMultiplexers(t *testing.T) {
 	svc.privKey, err = privKey(svc.cfg)
 	assert.NoError(t, err)
 	ipAddr := network.IPAddr()
-	opts := svc.buildOptions(ipAddr, svc.privKey)
+	opts, err := svc.buildOptions(ipAddr, svc.privKey)
+	assert.NoError(t, err)
+
 	err = cfg.Apply(append(opts, libp2p.FallbackDefaults)...)
 	assert.NoError(t, err)
 

beacon-chain/p2p/parameter_test.go

@@ -22,7 +22,7 @@ func TestGossipParameters(t *testing.T) {
 	pms := pubsubGossipParam()
 	assert.Equal(t, gossipSubMcacheLen, pms.HistoryLength, "gossipSubMcacheLen")
 	assert.Equal(t, gossipSubMcacheGossip, pms.HistoryGossip, "gossipSubMcacheGossip")
-	assert.Equal(t, gossipSubSeenTTL, int(pubsub.TimeCacheDuration.Milliseconds()/pms.HeartbeatInterval.Milliseconds()), "gossipSubSeenTtl")
+	assert.Equal(t, gossipSubSeenTTL, int(pubsub.TimeCacheDuration.Seconds()), "gossipSubSeenTtl")
 }
 
 func TestFanoutParameters(t *testing.T) {

beacon-chain/p2p/peers/peerdata/store_test.go

@@ -107,5 +107,4 @@ func TestStore_TrustedPeers(t *testing.T) {
 	assert.Equal(t, false, store.IsTrustedPeer(pid1))
 	assert.Equal(t, false, store.IsTrustedPeer(pid2))
 	assert.Equal(t, false, store.IsTrustedPeer(pid3))
-
 }

beacon-chain/p2p/peers/scorers/bad_responses.go

@@ -56,12 +56,12 @@ func newBadResponsesScorer(store *peerdata.Store, config *BadResponsesScorerConf
 func (s *BadResponsesScorer) Score(pid peer.ID) float64 {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.score(pid)
+	return s.scoreNoLock(pid)
 }
 
-// score is a lock-free version of Score.
-func (s *BadResponsesScorer) score(pid peer.ID) float64 {
-	if s.isBadPeer(pid) {
+// scoreNoLock is a lock-free version of Score.
+func (s *BadResponsesScorer) scoreNoLock(pid peer.ID) float64 {
+	if s.isBadPeerNoLock(pid) {
 		return BadPeerScore
 	}
 	score := float64(0)
@@ -87,11 +87,11 @@ func (s *BadResponsesScorer) Params() *BadResponsesScorerConfig {
 func (s *BadResponsesScorer) Count(pid peer.ID) (int, error) {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.count(pid)
+	return s.countNoLock(pid)
 }
 
-// count is a lock-free version of Count.
-func (s *BadResponsesScorer) count(pid peer.ID) (int, error) {
+// countNoLock is a lock-free version of Count.
+func (s *BadResponsesScorer) countNoLock(pid peer.ID) (int, error) {
 	if peerData, ok := s.store.PeerData(pid); ok {
 		return peerData.BadResponses, nil
 	}
@@ -119,11 +119,11 @@ func (s *BadResponsesScorer) Increment(pid peer.ID) {
 func (s *BadResponsesScorer) IsBadPeer(pid peer.ID) bool {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.isBadPeer(pid)
+	return s.isBadPeerNoLock(pid)
 }
 
-// isBadPeer is lock-free version of IsBadPeer.
-func (s *BadResponsesScorer) isBadPeer(pid peer.ID) bool {
+// isBadPeerNoLock is lock-free version of IsBadPeer.
+func (s *BadResponsesScorer) isBadPeerNoLock(pid peer.ID) bool {
 	if peerData, ok := s.store.PeerData(pid); ok {
 		return peerData.BadResponses >= s.config.Threshold
 	}
@@ -137,7 +137,7 @@ func (s *BadResponsesScorer) BadPeers() []peer.ID {
 
 	badPeers := make([]peer.ID, 0)
 	for pid := range s.store.Peers() {
-		if s.isBadPeer(pid) {
+		if s.isBadPeerNoLock(pid) {
 			badPeers = append(badPeers, pid)
 		}
 	}

beacon-chain/p2p/peers/scorers/bad_responses_test.go

@@ -15,6 +15,8 @@ import (
 )
 
 func TestScorers_BadResponses_Score(t *testing.T) {
+	const pid = "peer1"
+
 	ctx, cancel := context.WithCancel(context.Background())
 	defer cancel()
 
@@ -28,15 +30,23 @@ func TestScorers_BadResponses_Score(t *testing.T) {
 	})
 	scorer := peerStatuses.Scorers().BadResponsesScorer()
 
-	assert.Equal(t, 0.0, scorer.Score("peer1"), "Unexpected score for unregistered peer")
-	scorer.Increment("peer1")
-	assert.Equal(t, -2.5, scorer.Score("peer1"))
-	scorer.Increment("peer1")
-	assert.Equal(t, float64(-5), scorer.Score("peer1"))
-	scorer.Increment("peer1")
-	scorer.Increment("peer1")
-	assert.Equal(t, -100.0, scorer.Score("peer1"))
-	assert.Equal(t, true, scorer.IsBadPeer("peer1"))
+	assert.Equal(t, 0., scorer.Score(pid), "Unexpected score for unregistered peer")
+
+	scorer.Increment(pid)
+	assert.Equal(t, false, scorer.IsBadPeer(pid))
+	assert.Equal(t, -2.5, scorer.Score(pid))
+
+	scorer.Increment(pid)
+	assert.Equal(t, false, scorer.IsBadPeer(pid))
+	assert.Equal(t, float64(-5), scorer.Score(pid))
+
+	scorer.Increment(pid)
+	assert.Equal(t, false, scorer.IsBadPeer(pid))
+	assert.Equal(t, float64(-7.5), scorer.Score(pid))
+
+	scorer.Increment(pid)
+	assert.Equal(t, true, scorer.IsBadPeer(pid))
+	assert.Equal(t, -100.0, scorer.Score(pid))
 }
 
 func TestScorers_BadResponses_ParamsThreshold(t *testing.T) {

beacon-chain/p2p/peers/scorers/block_providers.go

@@ -98,11 +98,11 @@ func newBlockProviderScorer(store *peerdata.Store, config *BlockProviderScorerCo
 func (s *BlockProviderScorer) Score(pid peer.ID) float64 {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.score(pid)
+	return s.scoreNoLock(pid)
 }
 
-// score is a lock-free version of Score.
-func (s *BlockProviderScorer) score(pid peer.ID) float64 {
+// scoreNoLock is a lock-free version of Score.
+func (s *BlockProviderScorer) scoreNoLock(pid peer.ID) float64 {
 	score := float64(0)
 	peerData, ok := s.store.PeerData(pid)
 	// Boost score of new peers or peers that haven't been accessed for too long.
@@ -126,7 +126,7 @@ func (s *BlockProviderScorer) Params() *BlockProviderScorerConfig {
 func (s *BlockProviderScorer) IncrementProcessedBlocks(pid peer.ID, cnt uint64) {
 	s.store.Lock()
 	defer s.store.Unlock()
-	defer s.touch(pid)
+	defer s.touchNoLock(pid)
 
 	if cnt <= 0 {
 		return
@@ -145,11 +145,11 @@ func (s *BlockProviderScorer) IncrementProcessedBlocks(pid peer.ID, cnt uint64)
 func (s *BlockProviderScorer) Touch(pid peer.ID, t ...time.Time) {
 	s.store.Lock()
 	defer s.store.Unlock()
-	s.touch(pid, t...)
+	s.touchNoLock(pid, t...)
 }
 
-// touch is a lock-free version of Touch.
-func (s *BlockProviderScorer) touch(pid peer.ID, t ...time.Time) {
+// touchNoLock is a lock-free version of Touch.
+func (s *BlockProviderScorer) touchNoLock(pid peer.ID, t ...time.Time) {
 	peerData := s.store.PeerDataGetOrCreate(pid)
 	if len(t) == 1 {
 		peerData.BlockProviderUpdated = t[0]
@@ -162,11 +162,11 @@ func (s *BlockProviderScorer) touch(pid peer.ID, t ...time.Time) {
 func (s *BlockProviderScorer) ProcessedBlocks(pid peer.ID) uint64 {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.processedBlocks(pid)
+	return s.processedBlocksNoLock(pid)
 }
 
-// processedBlocks is a lock-free version of ProcessedBlocks.
-func (s *BlockProviderScorer) processedBlocks(pid peer.ID) uint64 {
+// processedBlocksNoLock is a lock-free version of ProcessedBlocks.
+func (s *BlockProviderScorer) processedBlocksNoLock(pid peer.ID) uint64 {
 	if peerData, ok := s.store.PeerData(pid); ok {
 		return peerData.ProcessedBlocks
 	}
@@ -177,13 +177,13 @@ func (s *BlockProviderScorer) processedBlocks(pid peer.ID) uint64 {
 // Block provider scorer cannot guarantee that lower score of a peer is indeed a sign of a bad peer.
 // Therefore this scorer never marks peers as bad, and relies on scores to probabilistically sort
 // out low-scorers (see WeightSorted method).
-func (_ *BlockProviderScorer) IsBadPeer(_ peer.ID) bool {
+func (*BlockProviderScorer) IsBadPeer(_ peer.ID) bool {
 	return false
 }
 
 // BadPeers returns the peers that are considered bad.
 // No peers are considered bad by block providers scorer.
-func (_ *BlockProviderScorer) BadPeers() []peer.ID {
+func (*BlockProviderScorer) BadPeers() []peer.ID {
 	return []peer.ID{}
 }
 
@@ -277,9 +277,9 @@ func (s *BlockProviderScorer) mapScoresAndPeers(
 	peers := make([]peer.ID, len(pids))
 	for i, pid := range pids {
 		if scoreFn != nil {
-			scores[pid] = scoreFn(pid, s.score(pid))
+			scores[pid] = scoreFn(pid, s.scoreNoLock(pid))
 		} else {
-			scores[pid] = s.score(pid)
+			scores[pid] = s.scoreNoLock(pid)
 		}
 		peers[i] = pid
 	}
@@ -293,9 +293,9 @@ func (s *BlockProviderScorer) FormatScorePretty(pid peer.ID) string {
 	if !features.Get().EnablePeerScorer {
 		return "disabled"
 	}
-	score := s.score(pid)
+	score := s.scoreNoLock(pid)
 	return fmt.Sprintf("[%0.1f%%, raw: %0.2f,  blocks: %d/%d]",
-		(score/s.MaxScore())*100, score, s.processedBlocks(pid), s.config.ProcessedBlocksCap)
+		(score/s.MaxScore())*100, score, s.processedBlocksNoLock(pid), s.config.ProcessedBlocksCap)
 }
 
 // MaxScore exposes maximum score attainable by peers.

beacon-chain/p2p/peers/scorers/gossip_scorer.go

@@ -38,11 +38,11 @@ func newGossipScorer(store *peerdata.Store, config *GossipScorerConfig) *GossipS
 func (s *GossipScorer) Score(pid peer.ID) float64 {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.score(pid)
+	return s.scoreNoLock(pid)
 }
 
-// score is a lock-free version of Score.
-func (s *GossipScorer) score(pid peer.ID) float64 {
+// scoreNoLock is a lock-free version of Score.
+func (s *GossipScorer) scoreNoLock(pid peer.ID) float64 {
 	peerData, ok := s.store.PeerData(pid)
 	if !ok {
 		return 0
@@ -54,11 +54,11 @@ func (s *GossipScorer) score(pid peer.ID) float64 {
 func (s *GossipScorer) IsBadPeer(pid peer.ID) bool {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.isBadPeer(pid)
+	return s.isBadPeerNoLock(pid)
 }
 
-// isBadPeer is lock-free version of IsBadPeer.
-func (s *GossipScorer) isBadPeer(pid peer.ID) bool {
+// isBadPeerNoLock is lock-free version of IsBadPeer.
+func (s *GossipScorer) isBadPeerNoLock(pid peer.ID) bool {
 	peerData, ok := s.store.PeerData(pid)
 	if !ok {
 		return false
@@ -73,7 +73,7 @@ func (s *GossipScorer) BadPeers() []peer.ID {
 
 	badPeers := make([]peer.ID, 0)
 	for pid := range s.store.Peers() {
-		if s.isBadPeer(pid) {
+		if s.isBadPeerNoLock(pid) {
 			badPeers = append(badPeers, pid)
 		}
 	}
@@ -98,11 +98,11 @@ func (s *GossipScorer) SetGossipData(pid peer.ID, gScore float64,
 func (s *GossipScorer) GossipData(pid peer.ID) (float64, float64, map[string]*pbrpc.TopicScoreSnapshot, error) {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.gossipData(pid)
+	return s.gossipDataNoLock(pid)
 }
 
-// gossipData lock-free version of GossipData.
-func (s *GossipScorer) gossipData(pid peer.ID) (float64, float64, map[string]*pbrpc.TopicScoreSnapshot, error) {
+// gossipDataNoLock lock-free version of GossipData.
+func (s *GossipScorer) gossipDataNoLock(pid peer.ID) (float64, float64, map[string]*pbrpc.TopicScoreSnapshot, error) {
 	if peerData, ok := s.store.PeerData(pid); ok {
 		return peerData.GossipScore, peerData.BehaviourPenalty, peerData.TopicScores, nil
 	}

beacon-chain/p2p/peers/scorers/peer_status.go

@@ -41,12 +41,12 @@ func newPeerStatusScorer(store *peerdata.Store, config *PeerStatusScorerConfig)
 func (s *PeerStatusScorer) Score(pid peer.ID) float64 {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.score(pid)
+	return s.scoreNoLock(pid)
 }
 
-// score is a lock-free version of Score.
-func (s *PeerStatusScorer) score(pid peer.ID) float64 {
-	if s.isBadPeer(pid) {
+// scoreNoLock is a lock-free version of Score.
+func (s *PeerStatusScorer) scoreNoLock(pid peer.ID) float64 {
+	if s.isBadPeerNoLock(pid) {
 		return BadPeerScore
 	}
 	score := float64(0)
@@ -70,11 +70,11 @@ func (s *PeerStatusScorer) score(pid peer.ID) float64 {
 func (s *PeerStatusScorer) IsBadPeer(pid peer.ID) bool {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.isBadPeer(pid)
+	return s.isBadPeerNoLock(pid)
 }
 
-// isBadPeer is lock-free version of IsBadPeer.
-func (s *PeerStatusScorer) isBadPeer(pid peer.ID) bool {
+// isBadPeerNoLock is lock-free version of IsBadPeer.
+func (s *PeerStatusScorer) isBadPeerNoLock(pid peer.ID) bool {
 	peerData, ok := s.store.PeerData(pid)
 	if !ok {
 		return false
@@ -100,7 +100,7 @@ func (s *PeerStatusScorer) BadPeers() []peer.ID {
 
 	badPeers := make([]peer.ID, 0)
 	for pid := range s.store.Peers() {
-		if s.isBadPeer(pid) {
+		if s.isBadPeerNoLock(pid) {
 			badPeers = append(badPeers, pid)
 		}
 	}
@@ -129,11 +129,11 @@ func (s *PeerStatusScorer) SetPeerStatus(pid peer.ID, chainState *pb.Status, val
 func (s *PeerStatusScorer) PeerStatus(pid peer.ID) (*pb.Status, error) {
 	s.store.RLock()
 	defer s.store.RUnlock()
-	return s.peerStatus(pid)
+	return s.peerStatusNoLock(pid)
 }
 
-// peerStatus lock-free version of PeerStatus.
-func (s *PeerStatusScorer) peerStatus(pid peer.ID) (*pb.Status, error) {
+// peerStatusNoLock lock-free version of PeerStatus.
+func (s *PeerStatusScorer) peerStatusNoLock(pid peer.ID) (*pb.Status, error) {
 	if peerData, ok := s.store.PeerData(pid); ok {
 		if peerData.ChainState == nil {
 			return nil, peerdata.ErrNoPeerStatus

beacon-chain/p2p/peers/scorers/service.go

@@ -116,10 +116,10 @@ func (s *Service) ScoreNoLock(pid peer.ID) float64 {
 	if _, ok := s.store.PeerData(pid); !ok {
 		return 0
 	}
-	score += s.scorers.badResponsesScorer.score(pid) * s.scorerWeight(s.scorers.badResponsesScorer)
-	score += s.scorers.blockProviderScorer.score(pid) * s.scorerWeight(s.scorers.blockProviderScorer)
-	score += s.scorers.peerStatusScorer.score(pid) * s.scorerWeight(s.scorers.peerStatusScorer)
-	score += s.scorers.gossipScorer.score(pid) * s.scorerWeight(s.scorers.gossipScorer)
+	score += s.scorers.badResponsesScorer.scoreNoLock(pid) * s.scorerWeight(s.scorers.badResponsesScorer)
+	score += s.scorers.blockProviderScorer.scoreNoLock(pid) * s.scorerWeight(s.scorers.blockProviderScorer)
+	score += s.scorers.peerStatusScorer.scoreNoLock(pid) * s.scorerWeight(s.scorers.peerStatusScorer)
+	score += s.scorers.gossipScorer.scoreNoLock(pid) * s.scorerWeight(s.scorers.gossipScorer)
 	return math.Round(score*ScoreRoundingFactor) / ScoreRoundingFactor
 }
 
@@ -132,14 +132,14 @@ func (s *Service) IsBadPeer(pid peer.ID) bool {
 
 // IsBadPeerNoLock is a lock-free version of IsBadPeer.
 func (s *Service) IsBadPeerNoLock(pid peer.ID) bool {
-	if s.scorers.badResponsesScorer.isBadPeer(pid) {
+	if s.scorers.badResponsesScorer.isBadPeerNoLock(pid) {
 		return true
 	}
-	if s.scorers.peerStatusScorer.isBadPeer(pid) {
+	if s.scorers.peerStatusScorer.isBadPeerNoLock(pid) {
 		return true
 	}
 	if features.Get().EnablePeerScorer {
-		if s.scorers.gossipScorer.isBadPeer(pid) {
+		if s.scorers.gossipScorer.isBadPeerNoLock(pid) {
 			return true
 		}
 	}

beacon-chain/p2p/pubsub.go

@@ -25,7 +25,7 @@ const (
 	// gossip parameters
 	gossipSubMcacheLen    = 6   // number of windows to retain full messages in cache for `IWANT` responses
 	gossipSubMcacheGossip = 3   // number of windows to gossip about
-	gossipSubSeenTTL      = 550 // number of heartbeat intervals to retain message IDs
+	gossipSubSeenTTL      = 768 // number of seconds to retain message IDs ( 2 epochs)
 
 	// fanout ttl
 	gossipSubFanoutTTL = 60000000000 // TTL for fanout maps for topics we are not subscribed to but have published to, in nano seconds
@@ -165,7 +165,8 @@ func pubsubGossipParam() pubsub.GossipSubParams {
 // to configure our message id time-cache rather than instantiating
 // it with a router instance.
 func setPubSubParameters() {
-	pubsub.TimeCacheDuration = 550 * gossipSubHeartbeatInterval
+	seenTtl := 2 * time.Second * time.Duration(params.BeaconConfig().SlotsPerEpoch.Mul(params.BeaconConfig().SecondsPerSlot))
+	pubsub.TimeCacheDuration = seenTtl
 }
 
 // convert from libp2p's internal schema to a compatible prysm protobuf format.

beacon-chain/p2p/service.go

@@ -56,6 +56,7 @@ type Service struct {
 	started               bool
 	isPreGenesis          bool
 	pingMethod            func(ctx context.Context, id peer.ID) error
+	pingMethodLock        sync.RWMutex
 	cancel                context.CancelFunc
 	cfg                   *Config
 	peers                 *peers.Status
@@ -81,44 +82,50 @@ type Service struct {
 // NewService initializes a new p2p service compatible with shared.Service interface. No
 // connections are made until the Start function is called during the service registry startup.
 func NewService(ctx context.Context, cfg *Config) (*Service, error) {
-	var err error
 	ctx, cancel := context.WithCancel(ctx)
 	_ = cancel // govet fix for lost cancel. Cancel is handled in service.Stop().
 
+	cfg = validateConfig(cfg)
+	privKey, err := privKey(cfg)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to generate p2p private key")
+	}
+
+	metaData, err := metaDataFromConfig(cfg)
+	if err != nil {
+		log.WithError(err).Error("Failed to create peer metadata")
+		return nil, err
+	}
+
+	addrFilter, err := configureFilter(cfg)
+	if err != nil {
+		log.WithError(err).Error("Failed to create address filter")
+		return nil, err
+	}
+
+	ipLimiter := leakybucket.NewCollector(ipLimit, ipBurst, 30*time.Second, true /* deleteEmptyBuckets */)
+
 	s := &Service{
 		ctx:          ctx,
 		cancel:       cancel,
 		cfg:          cfg,
+		addrFilter:   addrFilter,
+		ipLimiter:    ipLimiter,
+		privKey:      privKey,
+		metaData:     metaData,
 		isPreGenesis: true,
 		joinedTopics: make(map[string]*pubsub.Topic, len(gossipTopicMappings)),
 		subnetsLock:  make(map[uint64]*sync.RWMutex),
 	}
 
-	s.cfg = validateConfig(s.cfg)
-
-	dv5Nodes := parseBootStrapAddrs(s.cfg.BootstrapNodeAddr)
-
-	cfg.Discv5BootStrapAddr = dv5Nodes
-
 	ipAddr := prysmnetwork.IPAddr()
-	s.privKey, err = privKey(s.cfg)
-	if err != nil {
-		log.WithError(err).Error("Failed to generate p2p private key")
-		return nil, err
-	}
-	s.metaData, err = metaDataFromConfig(s.cfg)
-	if err != nil {
-		log.WithError(err).Error("Failed to create peer metadata")
-		return nil, err
-	}
-	s.addrFilter, err = configureFilter(s.cfg)
-	if err != nil {
-		log.WithError(err).Error("Failed to create address filter")
-		return nil, err
-	}
-	s.ipLimiter = leakybucket.NewCollector(ipLimit, ipBurst, 30*time.Second, true /* deleteEmptyBuckets */)
 
-	opts := s.buildOptions(ipAddr, s.privKey)
+	opts, err := s.buildOptions(ipAddr, s.privKey)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to build p2p options")
+	}
+	// Sets mplex timeouts
+	configureMplex()
 	h, err := libp2p.New(opts...)
 	if err != nil {
 		log.WithError(err).Error("Failed to create p2p host")
@@ -284,7 +291,7 @@ func (s *Service) Started() bool {
 }
 
 // Encoding returns the configured networking encoding.
-func (_ *Service) Encoding() encoder.NetworkEncoding {
+func (*Service) Encoding() encoder.NetworkEncoding {
 	return &encoder.SszNetworkEncoder{}
 }
 
@@ -354,10 +361,14 @@ func (s *Service) MetadataSeq() uint64 {
 // AddPingMethod adds the metadata ping rpc method to the p2p service, so that it can
 // be used to refresh ENR.
 func (s *Service) AddPingMethod(reqFunc func(ctx context.Context, id peer.ID) error) {
+	s.pingMethodLock.Lock()
 	s.pingMethod = reqFunc
+	s.pingMethodLock.Unlock()
 }
 
 func (s *Service) pingPeers() {
+	s.pingMethodLock.RLock()
+	defer s.pingMethodLock.RUnlock()
 	if s.pingMethod == nil {
 		return
 	}
@@ -446,8 +457,8 @@ func (s *Service) connectWithPeer(ctx context.Context, info peer.AddrInfo) error
 }
 
 func (s *Service) connectToBootnodes() error {
-	nodes := make([]*enode.Node, 0, len(s.cfg.Discv5BootStrapAddr))
-	for _, addr := range s.cfg.Discv5BootStrapAddr {
+	nodes := make([]*enode.Node, 0, len(s.cfg.Discv5BootStrapAddrs))
+	for _, addr := range s.cfg.Discv5BootStrapAddrs {
 		bootNode, err := enode.Parse(enode.ValidSchemes, addr)
 		if err != nil {
 			return err

beacon-chain/p2p/service_test.go

@@ -213,10 +213,9 @@ func TestListenForNewNodes(t *testing.T) {
 	// setup other nodes.
 	cs := startup.NewClockSynchronizer()
 	cfg = &Config{
-		BootstrapNodeAddr:   []string{bootNode.String()},
-		Discv5BootStrapAddr: []string{bootNode.String()},
-		MaxPeers:            30,
-		ClockWaiter:         cs,
+		Discv5BootStrapAddrs: []string{bootNode.String()},
+		MaxPeers:             30,
+		ClockWaiter:          cs,
 	}
 	for i := 1; i <= 5; i++ {
 		h, pkey, ipAddr := createHost(t, port+i)

beacon-chain/p2p/subnets.go

@@ -46,9 +46,13 @@ const syncLockerVal = 100
 const blobSubnetLockerVal = 110
 
 // FindPeersWithSubnet performs a network search for peers
-// subscribed to a particular subnet. Then we try to connect
-// with those peers. This method will block until the required amount of
-// peers are found, the method only exits in the event of context timeouts.
+// subscribed to a particular subnet. Then it tries to connect
+// with those peers. This method will block until either:
+// - the required amount of peers are found, or
+// - the context is terminated.
+// On some edge cases, this method may hang indefinitely while peers
+// are actually found. In such a case, the user should cancel the context
+// and re-run the method again.
 func (s *Service) FindPeersWithSubnet(ctx context.Context, topic string,
 	index uint64, threshold int) (bool, error) {
 	ctx, span := trace.StartSpan(ctx, "p2p.FindPeersWithSubnet")
@@ -73,9 +77,9 @@ func (s *Service) FindPeersWithSubnet(ctx context.Context, topic string,
 		return false, errors.New("no subnet exists for provided topic")
 	}
 
-	currNum := len(s.pubsub.ListPeers(topic))
 	wg := new(sync.WaitGroup)
 	for {
+		currNum := len(s.pubsub.ListPeers(topic))
 		if currNum >= threshold {
 			break
 		}
@@ -99,7 +103,6 @@ func (s *Service) FindPeersWithSubnet(ctx context.Context, topic string,
 		}
 		// Wait for all dials to be completed.
 		wg.Wait()
-		currNum = len(s.pubsub.ListPeers(topic))
 	}
 	return true, nil
 }
@@ -110,18 +113,13 @@ func (s *Service) filterPeerForAttSubnet(index uint64) func(node *enode.Node) bo
 		if !s.filterPeer(node) {
 			return false
 		}
+
 		subnets, err := attSubnets(node.Record())
 		if err != nil {
 			return false
 		}
-		indExists := false
-		for _, comIdx := range subnets {
-			if comIdx == index {
-				indExists = true
-				break
-			}
-		}
-		return indExists
+
+		return subnets[index]
 	}
 }
 
@@ -205,8 +203,10 @@ func initializePersistentSubnets(id enode.ID, epoch primitives.Epoch) error {
 //
 //	return [compute_subscribed_subnet(node_id, epoch, index) for index in range(SUBNETS_PER_NODE)]
 func computeSubscribedSubnets(nodeID enode.ID, epoch primitives.Epoch) ([]uint64, error) {
-	subs := []uint64{}
-	for i := uint64(0); i < params.BeaconConfig().SubnetsPerNode; i++ {
+	subnetsPerNode := params.BeaconConfig().SubnetsPerNode
+	subs := make([]uint64, 0, subnetsPerNode)
+
+	for i := uint64(0); i < subnetsPerNode; i++ {
 		sub, err := computeSubscribedSubnet(nodeID, epoch, i)
 		if err != nil {
 			return nil, err
@@ -281,19 +281,20 @@ func initializeSyncCommSubnets(node *enode.LocalNode) *enode.LocalNode {
 
 // Reads the attestation subnets entry from a node's ENR and determines
 // the committee indices of the attestation subnets the node is subscribed to.
-func attSubnets(record *enr.Record) ([]uint64, error) {
+func attSubnets(record *enr.Record) (map[uint64]bool, error) {
 	bitV, err := attBitvector(record)
 	if err != nil {
 		return nil, err
 	}
+	committeeIdxs := make(map[uint64]bool)
 	// lint:ignore uintcast -- subnet count can be safely cast to int.
 	if len(bitV) != byteCount(int(attestationSubnetCount)) {
-		return []uint64{}, errors.Errorf("invalid bitvector provided, it has a size of %d", len(bitV))
+		return committeeIdxs, errors.Errorf("invalid bitvector provided, it has a size of %d", len(bitV))
 	}
-	var committeeIdxs []uint64
+
 	for i := uint64(0); i < attestationSubnetCount; i++ {
 		if bitV.BitAt(i) {
-			committeeIdxs = append(committeeIdxs, i)
+			committeeIdxs[i] = true
 		}
 	}
 	return committeeIdxs, nil

beacon-chain/p2p/subnets_test.go

@@ -3,49 +3,46 @@ package p2p
 import (
 	"context"
 	"crypto/rand"
+	"encoding/hex"
+	"fmt"
 	"reflect"
 	"testing"
 	"time"
 
-	"github.com/ethereum/go-ethereum/p2p/discover"
 	"github.com/ethereum/go-ethereum/p2p/enode"
 	"github.com/ethereum/go-ethereum/p2p/enr"
 	"github.com/libp2p/go-libp2p/core/crypto"
 	"github.com/prysmaticlabs/go-bitfield"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v5/beacon-chain/startup"
 	"github.com/prysmaticlabs/prysm/v5/cmd/beacon-chain/flags"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
-	"github.com/prysmaticlabs/prysm/v5/consensus-types/wrapper"
 	ecdsaprysm "github.com/prysmaticlabs/prysm/v5/crypto/ecdsa"
-	pb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/testing/assert"
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
 )
 
-func TestStartDiscV5_DiscoverPeersWithSubnets(t *testing.T) {
-	params.SetupTestConfigCleanup(t)
-	// This test needs to be entirely rewritten and should be done in a follow up PR from #7885.
-	t.Skip("This test is now failing after PR 7885 due to false positive")
-	gFlags := new(flags.GlobalFlags)
-	gFlags.MinimumPeersPerSubnet = 4
-	flags.Init(gFlags)
-	// Reset config.
-	defer flags.Init(new(flags.GlobalFlags))
-	port := 2000
-	ipAddr, pkey := createAddrAndPrivKey(t)
-	genesisTime := time.Now()
-	genesisValidatorsRoot := make([]byte, 32)
-	s := &Service{
-		cfg:                   &Config{UDPPort: uint(port)},
-		genesisTime:           genesisTime,
-		genesisValidatorsRoot: genesisValidatorsRoot,
-	}
-	bootListener, err := s.createListener(ipAddr, pkey)
-	require.NoError(t, err)
-	defer bootListener.Close()
+func TestStartDiscV5_FindPeersWithSubnet(t *testing.T) {
+	// Topology of this test:
+	//
+	//
+	// Node 1 (subscribed to subnet 1)  --\
+	//									  |
+	// Node 2 (subscribed to subnet 2)  --+--> BootNode (not subscribed to any subnet) <------- Node 0 (not subscribed to any subnet)
+	//									  |
+	// Node 3 (subscribed to subnet 3)  --/
+	//
+	// The purpose of this test is to ensure that the "Node 0" (connected only to the boot node) is able to
+	// find and connect to a node already subscribed to a specific subnet.
+	// In our case: The node i is subscribed to subnet i, with i = 1, 2, 3
+
+	// Define the genesis validators root, to ensure everybody is on the same network.
+	const genesisValidatorRootStr = "0xdeadbeefcafecafedeadbeefcafecafedeadbeefcafecafedeadbeefcafecafe"
+	genesisValidatorsRoot, err := hex.DecodeString(genesisValidatorRootStr[2:])
+	require.NoError(t, err)
+
+	// Create a context.
+	ctx := context.Background()
 
-	bootNode := bootListener.Self()
 	// Use shorter period for testing.
 	currentPeriod := pollingPeriod
 	pollingPeriod = 1 * time.Second
@@ -53,113 +50,150 @@ func TestStartDiscV5_DiscoverPeersWithSubnets(t *testing.T) {
 		pollingPeriod = currentPeriod
 	}()
 
-	var listeners []*discover.UDPv5
+	// Create flags.
+	params.SetupTestConfigCleanup(t)
+	gFlags := new(flags.GlobalFlags)
+	gFlags.MinimumPeersPerSubnet = 1
+	flags.Init(gFlags)
+
+	params.BeaconNetworkConfig().MinimumPeersInSubnetSearch = 1
+
+	// Reset config.
+	defer flags.Init(new(flags.GlobalFlags))
+
+	// First, generate a bootstrap node.
+	ipAddr, pkey := createAddrAndPrivKey(t)
+	genesisTime := time.Now()
+
+	bootNodeService := &Service{
+		cfg:                   &Config{TCPPort: 2000, UDPPort: 3000},
+		genesisTime:           genesisTime,
+		genesisValidatorsRoot: genesisValidatorsRoot,
+	}
+
+	bootNodeForkDigest, err := bootNodeService.currentForkDigest()
+	require.NoError(t, err)
+
+	bootListener, err := bootNodeService.createListener(ipAddr, pkey)
+	require.NoError(t, err)
+	defer bootListener.Close()
+
+	bootNodeENR := bootListener.Self().String()
+
+	// Create 3 nodes, each subscribed to a different subnet.
+	// Each node is connected to the boostrap node.
+	services := make([]*Service, 0, 3)
+
 	for i := 1; i <= 3; i++ {
-		port = 3000 + i
-		cfg := &Config{
-			BootstrapNodeAddr:   []string{bootNode.String()},
-			Discv5BootStrapAddr: []string{bootNode.String()},
-			MaxPeers:            30,
-			UDPPort:             uint(port),
-		}
-		ipAddr, pkey := createAddrAndPrivKey(t)
-		s = &Service{
-			cfg:                   cfg,
-			genesisTime:           genesisTime,
-			genesisValidatorsRoot: genesisValidatorsRoot,
-		}
-		listener, err := s.startDiscoveryV5(ipAddr, pkey)
-		assert.NoError(t, err, "Could not start discovery for node")
+		subnet := uint64(i)
+		service, err := NewService(ctx, &Config{
+			Discv5BootStrapAddrs: []string{bootNodeENR},
+			MaxPeers:             30,
+			TCPPort:              uint(2000 + i),
+			UDPPort:              uint(3000 + i),
+		})
+
+		require.NoError(t, err)
+
+		service.genesisTime = genesisTime
+		service.genesisValidatorsRoot = genesisValidatorsRoot
+
+		nodeForkDigest, err := service.currentForkDigest()
+		require.NoError(t, err)
+		require.Equal(t, true, nodeForkDigest == bootNodeForkDigest, "fork digest of the node doesn't match the boot node")
+
+		// Start the service.
+		service.Start()
+
+		// Set the ENR `attnets`, used by Prysm to filter peers by subnet.
 		bitV := bitfield.NewBitvector64()
-		bitV.SetBitAt(uint64(i), true)
-
+		bitV.SetBitAt(subnet, true)
 		entry := enr.WithEntry(attSubnetEnrKey, &bitV)
-		listener.LocalNode().Set(entry)
-		listeners = append(listeners, listener)
+		service.dv5Listener.LocalNode().Set(entry)
+
+		// Join and subscribe to the subnet, needed by libp2p.
+		topic, err := service.pubsub.Join(fmt.Sprintf(AttestationSubnetTopicFormat, bootNodeForkDigest, subnet) + "/ssz_snappy")
+		require.NoError(t, err)
+
+		_, err = topic.Subscribe()
+		require.NoError(t, err)
+
+		// Memoize the service.
+		services = append(services, service)
 	}
+
+	// Stop the services.
 	defer func() {
-		// Close down all peers.
-		for _, listener := range listeners {
-			listener.Close()
+		for _, service := range services {
+			err := service.Stop()
+			require.NoError(t, err)
 		}
 	}()
 
-	// Make one service on port 4001.
-	port = 4001
-	gs := startup.NewClockSynchronizer()
 	cfg := &Config{
-		BootstrapNodeAddr:   []string{bootNode.String()},
-		Discv5BootStrapAddr: []string{bootNode.String()},
-		MaxPeers:            30,
-		UDPPort:             uint(port),
-		ClockWaiter:         gs,
+		Discv5BootStrapAddrs: []string{bootNodeENR},
+		MaxPeers:             30,
+		TCPPort:              2010,
+		UDPPort:              3010,
 	}
-	s, err = NewService(context.Background(), cfg)
+
+	service, err := NewService(ctx, cfg)
 	require.NoError(t, err)
 
-	exitRoutine := make(chan bool)
-	go func() {
-		s.Start()
-		<-exitRoutine
+	service.genesisTime = genesisTime
+	service.genesisValidatorsRoot = genesisValidatorsRoot
+
+	service.Start()
+	defer func() {
+		err := service.Stop()
+		require.NoError(t, err)
 	}()
-	time.Sleep(50 * time.Millisecond)
-	// Send in a loop to ensure it is delivered (busy wait for the service to subscribe to the state feed).
-	var vr [32]byte
-	require.NoError(t, gs.SetClock(startup.NewClock(time.Now(), vr)))
 
-	// Wait for the nodes to have their local routing tables to be populated with the other nodes
-	time.Sleep(6 * discoveryWaitTime)
+	// Look up 3 different subnets.
+	exists := make([]bool, 0, 3)
+	for i := 1; i <= 3; i++ {
+		subnet := uint64(i)
+		topic := fmt.Sprintf(AttestationSubnetTopicFormat, bootNodeForkDigest, subnet)
+
+		exist := false
+
+		// This for loop is used to ensure we don't get stuck in `FindPeersWithSubnet`.
+		// Read the documentation of `FindPeersWithSubnet` for more details.
+		for j := 0; j < 3; j++ {
+			ctxWithTimeOut, cancel := context.WithTimeout(ctx, 5*time.Second)
+			defer cancel()
+
+			exist, err = service.FindPeersWithSubnet(ctxWithTimeOut, topic, subnet, 1)
+			require.NoError(t, err)
+
+			if exist {
+				break
+			}
+		}
+
+		require.NoError(t, err)
+		exists = append(exists, exist)
 
-	// look up 3 different subnets
-	ctx := context.Background()
-	exists, err := s.FindPeersWithSubnet(ctx, "", 1, flags.Get().MinimumPeersPerSubnet)
-	require.NoError(t, err)
-	exists2, err := s.FindPeersWithSubnet(ctx, "", 2, flags.Get().MinimumPeersPerSubnet)
-	require.NoError(t, err)
-	exists3, err := s.FindPeersWithSubnet(ctx, "", 3, flags.Get().MinimumPeersPerSubnet)
-	require.NoError(t, err)
-	if !exists || !exists2 || !exists3 {
-		t.Fatal("Peer with subnet doesn't exist")
 	}
 
-	// Update ENR of a peer.
-	testService := &Service{
-		dv5Listener: listeners[0],
-		metaData: wrapper.WrappedMetadataV0(&pb.MetaDataV0{
-			Attnets: bitfield.NewBitvector64(),
-		}),
+	// Check if all peers are found.
+	for _, exist := range exists {
+		require.Equal(t, true, exist, "Peer with subnet doesn't exist")
 	}
-	cache.SubnetIDs.AddAttesterSubnetID(0, 10)
-	testService.RefreshENR()
-	time.Sleep(2 * time.Second)
-
-	exists, err = s.FindPeersWithSubnet(ctx, "", 2, flags.Get().MinimumPeersPerSubnet)
-	require.NoError(t, err)
-
-	assert.Equal(t, true, exists, "Peer with subnet doesn't exist")
-	assert.NoError(t, s.Stop())
-	exitRoutine <- true
 }
 
 func Test_AttSubnets(t *testing.T) {
 	params.SetupTestConfigCleanup(t)
 	tests := []struct {
 		name        string
-		record      func(t *testing.T) *enr.Record
+		record      func(localNode *enode.LocalNode) *enr.Record
 		want        []uint64
 		wantErr     bool
 		errContains string
 	}{
 		{
 			name: "valid record",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				localNode = initializeAttSubnets(localNode)
 				return localNode.Node().Record()
 			},
@@ -168,14 +202,7 @@ func Test_AttSubnets(t *testing.T) {
 		},
 		{
 			name: "too small subnet",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				entry := enr.WithEntry(attSubnetEnrKey, []byte{})
 				localNode.Set(entry)
 				return localNode.Node().Record()
@@ -186,14 +213,7 @@ func Test_AttSubnets(t *testing.T) {
 		},
 		{
 			name: "half sized subnet",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				entry := enr.WithEntry(attSubnetEnrKey, make([]byte, 4))
 				localNode.Set(entry)
 				return localNode.Node().Record()
@@ -204,14 +224,7 @@ func Test_AttSubnets(t *testing.T) {
 		},
 		{
 			name: "too large subnet",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				entry := enr.WithEntry(attSubnetEnrKey, make([]byte, byteCount(int(attestationSubnetCount))+1))
 				localNode.Set(entry)
 				return localNode.Node().Record()
@@ -222,14 +235,7 @@ func Test_AttSubnets(t *testing.T) {
 		},
 		{
 			name: "very large subnet",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				entry := enr.WithEntry(attSubnetEnrKey, make([]byte, byteCount(int(attestationSubnetCount))+100))
 				localNode.Set(entry)
 				return localNode.Node().Record()
@@ -240,14 +246,7 @@ func Test_AttSubnets(t *testing.T) {
 		},
 		{
 			name: "single subnet",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				bitV := bitfield.NewBitvector64()
 				bitV.SetBitAt(0, true)
 				entry := enr.WithEntry(attSubnetEnrKey, bitV.Bytes())
@@ -259,17 +258,10 @@ func Test_AttSubnets(t *testing.T) {
 		},
 		{
 			name: "multiple subnets",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				bitV := bitfield.NewBitvector64()
 				for i := uint64(0); i < bitV.Len(); i++ {
-					// skip 2 subnets
+					// Keep only odd subnets.
 					if (i+1)%2 == 0 {
 						continue
 					}
@@ -287,14 +279,7 @@ func Test_AttSubnets(t *testing.T) {
 		},
 		{
 			name: "all subnets",
-			record: func(t *testing.T) *enr.Record {
-				db, err := enode.OpenDB("")
-				assert.NoError(t, err)
-				priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
-				assert.NoError(t, err)
-				convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
-				assert.NoError(t, err)
-				localNode := enode.NewLocalNode(db, convertedKey)
+			record: func(localNode *enode.LocalNode) *enr.Record {
 				bitV := bitfield.NewBitvector64()
 				for i := uint64(0); i < bitV.Len(); i++ {
 					bitV.SetBitAt(i, true)
@@ -311,16 +296,35 @@ func Test_AttSubnets(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			got, err := attSubnets(tt.record(t))
+			db, err := enode.OpenDB("")
+			assert.NoError(t, err)
+
+			priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
+			assert.NoError(t, err)
+
+			convertedKey, err := ecdsaprysm.ConvertFromInterfacePrivKey(priv)
+			assert.NoError(t, err)
+
+			localNode := enode.NewLocalNode(db, convertedKey)
+			record := tt.record(localNode)
+
+			got, err := attSubnets(record)
 			if (err != nil) != tt.wantErr {
 				t.Errorf("syncSubnets() error = %v, wantErr %v", err, tt.wantErr)
 				return
 			}
+
 			if tt.wantErr {
 				assert.ErrorContains(t, tt.errContains, err)
 			}
-			if !reflect.DeepEqual(got, tt.want) {
-				t.Errorf("syncSubnets() got = %v, want %v", got, tt.want)
+
+			want := make(map[uint64]bool, len(tt.want))
+			for _, subnet := range tt.want {
+				want[subnet] = true
+			}
+
+			if !reflect.DeepEqual(got, want) {
+				t.Errorf("syncSubnets() got = %v, want %v", got, want)
 			}
 		})
 	}

beacon-chain/p2p/types/rpc_errors.go

@@ -8,11 +8,11 @@ var (
 	ErrInvalidFinalizedRoot   = errors.New("invalid finalized root")
 	ErrInvalidSequenceNum     = errors.New("invalid sequence number provided")
 	ErrGeneric                = errors.New("internal service error")
-	ErrInvalidParent          = errors.New("mismatched parent root")
-	ErrRateLimited            = errors.New("rate limited")
-	ErrIODeadline             = errors.New("i/o deadline exceeded")
-	ErrInvalidRequest         = errors.New("invalid range, step or count")
-	ErrBlobLTMinRequest       = errors.New("blob slot < minimum_request_epoch")
-	ErrMaxBlobReqExceeded     = errors.New("requested more than MAX_REQUEST_BLOB_SIDECARS")
-	ErrResourceUnavailable    = errors.New("resource requested unavailable")
+
+	ErrRateLimited         = errors.New("rate limited")
+	ErrIODeadline          = errors.New("i/o deadline exceeded")
+	ErrInvalidRequest      = errors.New("invalid range, step or count")
+	ErrBlobLTMinRequest    = errors.New("blob slot < minimum_request_epoch")
+	ErrMaxBlobReqExceeded  = errors.New("requested more than MAX_REQUEST_BLOB_SIDECARS")
+	ErrResourceUnavailable = errors.New("resource requested unavailable")
 )

beacon-chain/p2p/utils.go

@@ -54,38 +54,45 @@ func privKey(cfg *Config) (*ecdsa.PrivateKey, error) {
 		return privKeyFromFile(cfg.PrivateKey)
 	}
 
+	// Default keys have the next highest precedence, if they exist.
 	_, err := os.Stat(defaultKeyPath)
 	defaultKeysExist := !os.IsNotExist(err)
 	if err != nil && defaultKeysExist {
 		return nil, err
 	}
-	// Default keys have the next highest precedence, if they exist.
+
 	if defaultKeysExist {
 		return privKeyFromFile(defaultKeyPath)
 	}
+
 	// There are no keys on the filesystem, so we need to generate one.
 	priv, _, err := crypto.GenerateSecp256k1Key(rand.Reader)
 	if err != nil {
 		return nil, err
 	}
-	// If the StaticPeerID flag is set, save the generated key as the default
-	// key, so that it will be used by default on the next node start.
-	if cfg.StaticPeerID {
-		rawbytes, err := priv.Raw()
-		if err != nil {
-			return nil, err
-		}
-		dst := make([]byte, hex.EncodedLen(len(rawbytes)))
-		hex.Encode(dst, rawbytes)
-		if err := file.WriteFile(defaultKeyPath, dst); err != nil {
-			return nil, err
-		}
-		log.Infof("Wrote network key to file")
-		// Read the key from the defaultKeyPath file just written
-		// for the strongest guarantee that the next start will be the same as this one.
-		return privKeyFromFile(defaultKeyPath)
+
+	// If the StaticPeerID flag is not set, return the private key.
+	if !cfg.StaticPeerID {
+		return ecdsaprysm.ConvertFromInterfacePrivKey(priv)
 	}
-	return ecdsaprysm.ConvertFromInterfacePrivKey(priv)
+
+	// Save the generated key as the default key, so that it will be used by
+	// default on the next node start.
+	rawbytes, err := priv.Raw()
+	if err != nil {
+		return nil, err
+	}
+
+	dst := make([]byte, hex.EncodedLen(len(rawbytes)))
+	hex.Encode(dst, rawbytes)
+	if err := file.WriteFile(defaultKeyPath, dst); err != nil {
+		return nil, err
+	}
+
+	log.Info("Wrote network key to file")
+	// Read the key from the defaultKeyPath file just written
+	// for the strongest guarantee that the next start will be the same as this one.
+	return privKeyFromFile(defaultKeyPath)
 }
 
 // Retrieves a p2p networking private key from a file path.

beacon-chain/rpc/BUILD.bazel

@@ -3,6 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
     name = "go_default_library",
     srcs = [
+        "endpoints.go",
         "log.go",
         "service.go",
     ],
@@ -58,6 +59,9 @@ go_library(
         "@com_github_grpc_ecosystem_go_grpc_middleware//tracing/opentracing:go_default_library",
         "@com_github_grpc_ecosystem_go_grpc_prometheus//:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
+        "@com_github_prometheus_client_golang//prometheus:go_default_library",
+        "@com_github_prometheus_client_golang//prometheus/promauto:go_default_library",
+        "@com_github_prometheus_client_golang//prometheus/promhttp:go_default_library",
         "@com_github_sirupsen_logrus//:go_default_library",
         "@io_opencensus_go//plugin/ocgrpc:go_default_library",
         "@org_golang_google_grpc//:go_default_library",
@@ -70,23 +74,14 @@ go_library(
 go_test(
     name = "go_default_test",
     size = "medium",
-    srcs = ["service_test.go"],
+    srcs = [
+        "endpoints_test.go",
+        "service_test.go",
+    ],
     embed = [":go_default_library"],
     deps = [
         "//beacon-chain/blockchain/testing:go_default_library",
         "//beacon-chain/execution/testing:go_default_library",
-        "//beacon-chain/rpc/eth/beacon:go_default_library",
-        "//beacon-chain/rpc/eth/blob:go_default_library",
-        "//beacon-chain/rpc/eth/builder:go_default_library",
-        "//beacon-chain/rpc/eth/debug:go_default_library",
-        "//beacon-chain/rpc/eth/events:go_default_library",
-        "//beacon-chain/rpc/eth/light-client:go_default_library",
-        "//beacon-chain/rpc/eth/node:go_default_library",
-        "//beacon-chain/rpc/eth/rewards:go_default_library",
-        "//beacon-chain/rpc/eth/validator:go_default_library",
-        "//beacon-chain/rpc/prysm/beacon:go_default_library",
-        "//beacon-chain/rpc/prysm/node:go_default_library",
-        "//beacon-chain/rpc/prysm/validator:go_default_library",
         "//beacon-chain/startup:go_default_library",
         "//beacon-chain/sync/initial-sync/testing:go_default_library",
         "//testing/assert:go_default_library",

beacon-chain/rpc/core/validator.go

@@ -401,7 +401,19 @@ func (s *Service) GetAttestationData(
 	if err != nil {
 		return nil, &RpcError{Reason: Internal, Err: errors.Wrap(err, "could not get target root")}
 	}
-	justifiedCheckpoint := s.FinalizedFetcher.CurrentJustifiedCheckpt()
+
+	headState, err := s.HeadFetcher.HeadState(ctx)
+	if err != nil {
+		return nil, &RpcError{Reason: Internal, Err: errors.Wrap(err, "could not get head state")}
+	}
+	if coreTime.CurrentEpoch(headState) < slots.ToEpoch(req.Slot) { // Ensure justified checkpoint safety by processing head state across the boundary.
+		headState, err = transition.ProcessSlotsUsingNextSlotCache(ctx, headState, headRoot, req.Slot)
+		if err != nil {
+			return nil, &RpcError{Reason: Internal, Err: errors.Errorf("could not process slots up to %d: %v", req.Slot, err)}
+		}
+	}
+	justifiedCheckpoint := headState.CurrentJustifiedCheckpoint()
+
 	if err = s.AttestationCache.Put(&cache.AttestationConsensusData{
 		Slot:     req.Slot,
 		HeadRoot: headRoot,

beacon-chain/rpc/endpoints.go

@@ -0,0 +1,780 @@
+package rpc
+
+import (
+	"net/http"
+
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/core"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/beacon"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/blob"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/builder"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/config"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/debug"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/events"
+	lightclient "github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/light-client"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/node"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/rewards"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/validator"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/lookup"
+	beaconprysm "github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/prysm/beacon"
+	nodeprysm "github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/prysm/node"
+	validatorv1alpha1 "github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/prysm/v1alpha1/validator"
+	validatorprysm "github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/prysm/validator"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/stategen"
+)
+
+type endpoint struct {
+	template string
+	name     string
+	handler  http.HandlerFunc
+	methods  []string
+}
+
+func (s *Service) endpoints(
+	enableDebug bool,
+	blocker lookup.Blocker,
+	stater lookup.Stater,
+	rewardFetcher rewards.BlockRewardsFetcher,
+	validatorServer *validatorv1alpha1.Server,
+	coreService *core.Service,
+	ch *stategen.CanonicalHistory,
+) []endpoint {
+	endpoints := make([]endpoint, 0)
+	endpoints = append(endpoints, s.rewardsEndpoints(blocker, stater, rewardFetcher)...)
+	endpoints = append(endpoints, s.builderEndpoints(stater)...)
+	endpoints = append(endpoints, s.blobEndpoints(blocker)...)
+	endpoints = append(endpoints, s.validatorEndpoints(validatorServer, stater, coreService, rewardFetcher)...)
+	endpoints = append(endpoints, s.nodeEndpoints()...)
+	endpoints = append(endpoints, s.beaconEndpoints(ch, stater, blocker, validatorServer, coreService)...)
+	endpoints = append(endpoints, s.configEndpoints()...)
+	endpoints = append(endpoints, s.lightClientEndpoints(blocker, stater)...)
+	endpoints = append(endpoints, s.eventsEndpoints()...)
+	endpoints = append(endpoints, s.prysmBeaconEndpoints(ch, stater)...)
+	endpoints = append(endpoints, s.prysmNodeEndpoints()...)
+	endpoints = append(endpoints, s.prysmValidatorEndpoints(coreService, stater)...)
+	if enableDebug {
+		endpoints = append(endpoints, s.debugEndpoints(stater)...)
+	}
+	return endpoints
+}
+
+func (s *Service) rewardsEndpoints(blocker lookup.Blocker, stater lookup.Stater, rewardFetcher rewards.BlockRewardsFetcher) []endpoint {
+	server := &rewards.Server{
+		Blocker:               blocker,
+		OptimisticModeFetcher: s.cfg.OptimisticModeFetcher,
+		FinalizationFetcher:   s.cfg.FinalizationFetcher,
+		TimeFetcher:           s.cfg.GenesisTimeFetcher,
+		Stater:                stater,
+		HeadFetcher:           s.cfg.HeadFetcher,
+		BlockRewardFetcher:    rewardFetcher,
+	}
+
+	const namespace = "rewards"
+	return []endpoint{
+		{
+			template: "/eth/v1/beacon/rewards/blocks/{block_id}",
+			name:     namespace + ".BlockRewards",
+			handler:  server.BlockRewards,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/rewards/attestations/{epoch}",
+			name:     namespace + ".AttestationRewards",
+			handler:  server.AttestationRewards,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/rewards/sync_committee/{block_id}",
+			name:     namespace + ".SyncCommitteeRewards",
+			handler:  server.SyncCommitteeRewards,
+			methods:  []string{http.MethodPost},
+		},
+	}
+}
+
+func (s *Service) builderEndpoints(stater lookup.Stater) []endpoint {
+	server := &builder.Server{
+		FinalizationFetcher:   s.cfg.FinalizationFetcher,
+		OptimisticModeFetcher: s.cfg.OptimisticModeFetcher,
+		Stater:                stater,
+	}
+
+	const namespace = "builder"
+	return []endpoint{
+		{
+			template: "/eth/v1/builder/states/{state_id}/expected_withdrawals",
+			name:     namespace + ".ExpectedWithdrawals",
+			handler:  server.ExpectedWithdrawals,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+func (s *Service) blobEndpoints(blocker lookup.Blocker) []endpoint {
+	server := &blob.Server{
+		Blocker: blocker,
+	}
+
+	const namespace = "blob"
+	return []endpoint{
+		{
+			template: "/eth/v1/beacon/blob_sidecars/{block_id}",
+			name:     namespace + ".Blobs",
+			handler:  server.Blobs,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+func (s *Service) validatorEndpoints(
+	validatorServer *validatorv1alpha1.Server,
+	stater lookup.Stater,
+	coreService *core.Service,
+	rewardFetcher rewards.BlockRewardsFetcher,
+) []endpoint {
+	server := &validator.Server{
+		HeadFetcher:            s.cfg.HeadFetcher,
+		TimeFetcher:            s.cfg.GenesisTimeFetcher,
+		SyncChecker:            s.cfg.SyncService,
+		OptimisticModeFetcher:  s.cfg.OptimisticModeFetcher,
+		AttestationsPool:       s.cfg.AttestationsPool,
+		PeerManager:            s.cfg.PeerManager,
+		Broadcaster:            s.cfg.Broadcaster,
+		V1Alpha1Server:         validatorServer,
+		Stater:                 stater,
+		SyncCommitteePool:      s.cfg.SyncCommitteeObjectPool,
+		ChainInfoFetcher:       s.cfg.ChainInfoFetcher,
+		BeaconDB:               s.cfg.BeaconDB,
+		BlockBuilder:           s.cfg.BlockBuilder,
+		OperationNotifier:      s.cfg.OperationNotifier,
+		TrackedValidatorsCache: s.cfg.TrackedValidatorsCache,
+		PayloadIDCache:         s.cfg.PayloadIDCache,
+		CoreService:            coreService,
+		BlockRewardFetcher:     rewardFetcher,
+	}
+
+	const namespace = "validator"
+	return []endpoint{
+		{
+			template: "/eth/v1/validator/aggregate_attestation",
+			name:     namespace + ".GetAggregateAttestation",
+			handler:  server.GetAggregateAttestation,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/validator/contribution_and_proofs",
+			name:     namespace + ".SubmitContributionAndProofs",
+			handler:  server.SubmitContributionAndProofs,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/aggregate_and_proofs",
+			name:     namespace + ".SubmitAggregateAndProofs",
+			handler:  server.SubmitAggregateAndProofs,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/sync_committee_contribution",
+			name:     namespace + ".ProduceSyncCommitteeContribution",
+			handler:  server.ProduceSyncCommitteeContribution,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/validator/sync_committee_subscriptions",
+			name:     namespace + ".SubmitSyncCommitteeSubscription",
+			handler:  server.SubmitSyncCommitteeSubscription,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/beacon_committee_subscriptions",
+			name:     namespace + ".SubmitBeaconCommitteeSubscription",
+			handler:  server.SubmitBeaconCommitteeSubscription,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/attestation_data",
+			name:     namespace + ".GetAttestationData",
+			handler:  server.GetAttestationData,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/validator/register_validator",
+			name:     namespace + ".RegisterValidator",
+			handler:  server.RegisterValidator,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/duties/attester/{epoch}",
+			name:     namespace + ".GetAttesterDuties",
+			handler:  server.GetAttesterDuties,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/duties/proposer/{epoch}",
+			name:     namespace + ".GetProposerDuties",
+			handler:  server.GetProposerDuties,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/validator/duties/sync/{epoch}",
+			name:     namespace + ".GetSyncCommitteeDuties",
+			handler:  server.GetSyncCommitteeDuties,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/prepare_beacon_proposer",
+			name:     namespace + ".PrepareBeaconProposer",
+			handler:  server.PrepareBeaconProposer,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/liveness/{epoch}",
+			name:     namespace + ".GetLiveness",
+			handler:  server.GetLiveness,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v2/validator/blocks/{slot}",
+			name:     namespace + ".ProduceBlockV2",
+			handler:  server.ProduceBlockV2,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/validator/blinded_blocks/{slot}",
+			name:     namespace + ".ProduceBlindedBlock",
+			handler:  server.ProduceBlindedBlock,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v3/validator/blocks/{slot}",
+			name:     namespace + ".ProduceBlockV3",
+			handler:  server.ProduceBlockV3,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/validator/beacon_committee_selections",
+			name:     namespace + ".BeaconCommitteeSelections",
+			handler:  server.BeaconCommitteeSelections,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/validator/sync_committee_selections",
+			name:     namespace + ".SyncCommittee Selections",
+			handler:  server.SyncCommitteeSelections,
+			methods:  []string{http.MethodPost},
+		},
+	}
+}
+
+func (s *Service) nodeEndpoints() []endpoint {
+	server := &node.Server{
+		BeaconDB:                  s.cfg.BeaconDB,
+		Server:                    s.grpcServer,
+		SyncChecker:               s.cfg.SyncService,
+		OptimisticModeFetcher:     s.cfg.OptimisticModeFetcher,
+		GenesisTimeFetcher:        s.cfg.GenesisTimeFetcher,
+		PeersFetcher:              s.cfg.PeersFetcher,
+		PeerManager:               s.cfg.PeerManager,
+		MetadataProvider:          s.cfg.MetadataProvider,
+		HeadFetcher:               s.cfg.HeadFetcher,
+		ExecutionChainInfoFetcher: s.cfg.ExecutionChainInfoFetcher,
+	}
+
+	const namespace = "node"
+	return []endpoint{
+		{
+			template: "/eth/v1/node/syncing",
+			name:     namespace + ".GetSyncStatus",
+			handler:  server.GetSyncStatus,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/node/identity",
+			name:     namespace + ".GetIdentity",
+			handler:  server.GetIdentity,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/node/peers/{peer_id}",
+			name:     namespace + ".GetPeer",
+			handler:  server.GetPeer,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/node/peers",
+			name:     namespace + ".GetPeers",
+			handler:  server.GetPeers,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/node/peer_count",
+			name:     namespace + ".GetPeerCount",
+			handler:  server.GetPeerCount,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/node/version",
+			name:     namespace + ".GetVersion",
+			handler:  server.GetVersion,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/node/health",
+			name:     namespace + ".GetHealth",
+			handler:  server.GetHealth,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+func (s *Service) beaconEndpoints(
+	ch *stategen.CanonicalHistory,
+	stater lookup.Stater,
+	blocker lookup.Blocker,
+	validatorServer *validatorv1alpha1.Server,
+	coreService *core.Service,
+) []endpoint {
+	server := &beacon.Server{
+		CanonicalHistory:              ch,
+		BeaconDB:                      s.cfg.BeaconDB,
+		AttestationsPool:              s.cfg.AttestationsPool,
+		SlashingsPool:                 s.cfg.SlashingsPool,
+		ChainInfoFetcher:              s.cfg.ChainInfoFetcher,
+		GenesisTimeFetcher:            s.cfg.GenesisTimeFetcher,
+		BlockNotifier:                 s.cfg.BlockNotifier,
+		OperationNotifier:             s.cfg.OperationNotifier,
+		Broadcaster:                   s.cfg.Broadcaster,
+		BlockReceiver:                 s.cfg.BlockReceiver,
+		StateGenService:               s.cfg.StateGen,
+		Stater:                        stater,
+		Blocker:                       blocker,
+		OptimisticModeFetcher:         s.cfg.OptimisticModeFetcher,
+		HeadFetcher:                   s.cfg.HeadFetcher,
+		TimeFetcher:                   s.cfg.GenesisTimeFetcher,
+		VoluntaryExitsPool:            s.cfg.ExitPool,
+		V1Alpha1ValidatorServer:       validatorServer,
+		SyncChecker:                   s.cfg.SyncService,
+		ExecutionPayloadReconstructor: s.cfg.ExecutionPayloadReconstructor,
+		BLSChangesPool:                s.cfg.BLSChangesPool,
+		FinalizationFetcher:           s.cfg.FinalizationFetcher,
+		ForkchoiceFetcher:             s.cfg.ForkchoiceFetcher,
+		CoreService:                   coreService,
+	}
+
+	const namespace = "beacon"
+	return []endpoint{
+		{
+			template: "/eth/v1/beacon/states/{state_id}/committees",
+			name:     namespace + ".GetCommittees",
+			handler:  server.GetCommittees,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/fork",
+			name:     namespace + ".GetStateFork",
+			handler:  server.GetStateFork,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/root",
+			name:     namespace + ".GetStateRoot",
+			handler:  server.GetStateRoot,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/sync_committees",
+			name:     namespace + ".GetSyncCommittees",
+			handler:  server.GetSyncCommittees,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/randao",
+			name:     namespace + ".GetRandao",
+			handler:  server.GetRandao,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/blocks",
+			name:     namespace + ".PublishBlock",
+			handler:  server.PublishBlock,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/blinded_blocks",
+			name:     namespace + ".PublishBlindedBlock",
+			handler:  server.PublishBlindedBlock,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v2/beacon/blocks",
+			name:     namespace + ".PublishBlockV2",
+			handler:  server.PublishBlockV2,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v2/beacon/blinded_blocks",
+			name:     namespace + ".PublishBlindedBlockV2",
+			handler:  server.PublishBlindedBlockV2,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v2/beacon/blocks/{block_id}",
+			name:     namespace + ".GetBlockV2",
+			handler:  server.GetBlockV2,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/blocks/{block_id}/attestations",
+			name:     namespace + ".GetBlockAttestations",
+			handler:  server.GetBlockAttestations,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/blinded_blocks/{block_id}",
+			name:     namespace + ".GetBlindedBlock",
+			handler:  server.GetBlindedBlock,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/blocks/{block_id}/root",
+			name:     namespace + ".GetBlockRoot",
+			handler:  server.GetBlockRoot,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/pool/attestations",
+			name:     namespace + ".ListAttestations",
+			handler:  server.ListAttestations,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/pool/attestations",
+			name:     namespace + ".SubmitAttestations",
+			handler:  server.SubmitAttestations,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/pool/voluntary_exits",
+			name:     namespace + ".ListVoluntaryExits",
+			handler:  server.ListVoluntaryExits,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/pool/voluntary_exits",
+			name:     namespace + ".SubmitVoluntaryExit",
+			handler:  server.SubmitVoluntaryExit,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/pool/sync_committees",
+			name:     namespace + ".SubmitSyncCommitteeSignatures",
+			handler:  server.SubmitSyncCommitteeSignatures,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/pool/bls_to_execution_changes",
+			name:     namespace + ".ListBLSToExecutionChanges",
+			handler:  server.ListBLSToExecutionChanges,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/pool/bls_to_execution_changes",
+			name:     namespace + ".SubmitBLSToExecutionChanges",
+			handler:  server.SubmitBLSToExecutionChanges,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/pool/attester_slashings",
+			name:     namespace + ".GetAttesterSlashings",
+			handler:  server.GetAttesterSlashings,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/pool/attester_slashings",
+			name:     namespace + ".SubmitAttesterSlashing",
+			handler:  server.SubmitAttesterSlashing,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/pool/proposer_slashings",
+			name:     namespace + ".GetProposerSlashings",
+			handler:  server.GetProposerSlashings,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/pool/proposer_slashings",
+			name:     namespace + ".SubmitProposerSlashing",
+			handler:  server.SubmitProposerSlashing,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/headers",
+			name:     namespace + ".GetBlockHeaders",
+			handler:  server.GetBlockHeaders,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/headers/{block_id}",
+			name:     namespace + ".GetBlockHeader",
+			handler:  server.GetBlockHeader,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/genesis",
+			name:     namespace + ".GetGenesis",
+			handler:  server.GetGenesis,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/finality_checkpoints",
+			name:     namespace + ".GetFinalityCheckpoints",
+			handler:  server.GetFinalityCheckpoints,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/validators",
+			name:     namespace + ".GetValidators",
+			handler:  server.GetValidators,
+			methods:  []string{http.MethodGet, http.MethodPost},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/validators/{validator_id}",
+			name:     namespace + ".GetValidator",
+			handler:  server.GetValidator,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/validator_balances",
+			name:     namespace + ".GetValidatorBalances",
+			handler:  server.GetValidatorBalances,
+			methods:  []string{http.MethodGet, http.MethodPost},
+		},
+	}
+}
+
+func (s *Service) configEndpoints() []endpoint {
+	const namespace = "config"
+	return []endpoint{
+		{
+			template: "/eth/v1/config/deposit_contract",
+			name:     namespace + ".GetDepositContract",
+			handler:  config.GetDepositContract,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/config/fork_schedule",
+			name:     namespace + ".GetForkSchedule",
+			handler:  config.GetForkSchedule,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/config/spec",
+			name:     namespace + ".GetSpec",
+			handler:  config.GetSpec,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+func (s *Service) lightClientEndpoints(blocker lookup.Blocker, stater lookup.Stater) []endpoint {
+	server := &lightclient.Server{
+		Blocker:     blocker,
+		Stater:      stater,
+		HeadFetcher: s.cfg.HeadFetcher,
+	}
+
+	const namespace = "lightclient"
+	return []endpoint{
+		{
+			template: "/eth/v1/beacon/light_client/bootstrap/{block_root}",
+			name:     namespace + ".GetLightClientBootstrap",
+			handler:  server.GetLightClientBootstrap,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/light_client/updates",
+			name:     namespace + ".GetLightClientUpdatesByRange",
+			handler:  server.GetLightClientUpdatesByRange,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/light_client/finality_update",
+			name:     namespace + ".GetLightClientFinalityUpdate",
+			handler:  server.GetLightClientFinalityUpdate,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/light_client/optimistic_update",
+			name:     namespace + ".GetLightClientOptimisticUpdate",
+			handler:  server.GetLightClientOptimisticUpdate,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+func (s *Service) debugEndpoints(stater lookup.Stater) []endpoint {
+	server := &debug.Server{
+		BeaconDB:              s.cfg.BeaconDB,
+		HeadFetcher:           s.cfg.HeadFetcher,
+		Stater:                stater,
+		OptimisticModeFetcher: s.cfg.OptimisticModeFetcher,
+		ForkFetcher:           s.cfg.ForkFetcher,
+		ForkchoiceFetcher:     s.cfg.ForkchoiceFetcher,
+		FinalizationFetcher:   s.cfg.FinalizationFetcher,
+		ChainInfoFetcher:      s.cfg.ChainInfoFetcher,
+	}
+
+	const namespace = "debug"
+	return []endpoint{
+		{
+			template: "/eth/v2/debug/beacon/states/{state_id}",
+			name:     namespace + ".GetBeaconStateV2",
+			handler:  server.GetBeaconStateV2,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v2/debug/beacon/heads",
+			name:     namespace + ".GetForkChoiceHeadsV2",
+			handler:  server.GetForkChoiceHeadsV2,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/debug/fork_choice",
+			name:     namespace + ".GetForkChoice",
+			handler:  server.GetForkChoice,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+func (s *Service) eventsEndpoints() []endpoint {
+	server := &events.Server{
+		StateNotifier:     s.cfg.StateNotifier,
+		OperationNotifier: s.cfg.OperationNotifier,
+		HeadFetcher:       s.cfg.HeadFetcher,
+		ChainInfoFetcher:  s.cfg.ChainInfoFetcher,
+	}
+
+	const namespace = "events"
+	return []endpoint{
+		{
+			template: "/eth/v1/events",
+			name:     namespace + ".StreamEvents",
+			handler:  server.StreamEvents,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+// Prysm custom endpoints
+
+func (s *Service) prysmBeaconEndpoints(ch *stategen.CanonicalHistory, stater lookup.Stater) []endpoint {
+	server := &beaconprysm.Server{
+		SyncChecker:           s.cfg.SyncService,
+		HeadFetcher:           s.cfg.HeadFetcher,
+		TimeFetcher:           s.cfg.GenesisTimeFetcher,
+		OptimisticModeFetcher: s.cfg.OptimisticModeFetcher,
+		CanonicalHistory:      ch,
+		BeaconDB:              s.cfg.BeaconDB,
+		Stater:                stater,
+		ChainInfoFetcher:      s.cfg.ChainInfoFetcher,
+		FinalizationFetcher:   s.cfg.FinalizationFetcher,
+	}
+
+	const namespace = "prysm.beacon"
+	return []endpoint{
+		{
+			template: "/prysm/v1/beacon/weak_subjectivity",
+			name:     namespace + ".GetWeakSubjectivity",
+			handler:  server.GetWeakSubjectivity,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/eth/v1/beacon/states/{state_id}/validator_count",
+			name:     namespace + ".GetValidatorCount",
+			handler:  server.GetValidatorCount,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/prysm/v1/beacon/states/{state_id}/validator_count",
+			name:     namespace + ".GetValidatorCount",
+			handler:  server.GetValidatorCount,
+			methods:  []string{http.MethodGet},
+		},
+	}
+}
+
+func (s *Service) prysmNodeEndpoints() []endpoint {
+	server := &nodeprysm.Server{
+		BeaconDB:                  s.cfg.BeaconDB,
+		SyncChecker:               s.cfg.SyncService,
+		OptimisticModeFetcher:     s.cfg.OptimisticModeFetcher,
+		GenesisTimeFetcher:        s.cfg.GenesisTimeFetcher,
+		PeersFetcher:              s.cfg.PeersFetcher,
+		PeerManager:               s.cfg.PeerManager,
+		MetadataProvider:          s.cfg.MetadataProvider,
+		HeadFetcher:               s.cfg.HeadFetcher,
+		ExecutionChainInfoFetcher: s.cfg.ExecutionChainInfoFetcher,
+	}
+
+	const namespace = "prysm.node"
+	return []endpoint{
+		{
+			template: "/prysm/node/trusted_peers",
+			name:     namespace + ".ListTrustedPeer",
+			handler:  server.ListTrustedPeer,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/prysm/v1/node/trusted_peers",
+			name:     namespace + ".ListTrustedPeer",
+			handler:  server.ListTrustedPeer,
+			methods:  []string{http.MethodGet},
+		},
+		{
+			template: "/prysm/node/trusted_peers",
+			name:     namespace + ".AddTrustedPeer",
+			handler:  server.AddTrustedPeer,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/prysm/v1/node/trusted_peers",
+			name:     namespace + ".AddTrustedPeer",
+			handler:  server.AddTrustedPeer,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/prysm/node/trusted_peers/{peer_id}",
+			name:     namespace + ".RemoveTrustedPeer",
+			handler:  server.RemoveTrustedPeer,
+			methods:  []string{http.MethodDelete},
+		},
+		{
+			template: "/prysm/v1/node/trusted_peers/{peer_id}",
+			name:     namespace + ".RemoveTrustedPeer",
+			handler:  server.RemoveTrustedPeer,
+			methods:  []string{http.MethodDelete},
+		},
+	}
+}
+
+func (s *Service) prysmValidatorEndpoints(coreService *core.Service, stater lookup.Stater) []endpoint {
+	server := &validatorprysm.Server{
+		CoreService: coreService,
+	}
+
+	const namespace = "prysm.validator"
+	return []endpoint{
+		{
+			template: "/prysm/validators/performance",
+			name:     namespace + ".GetValidatorPerformance",
+			handler:  server.GetValidatorPerformance,
+			methods:  []string{http.MethodPost},
+		},
+		{
+			template: "/prysm/v1/validators/performance",
+			name:     namespace + ".GetValidatorPerformance",
+			handler:  server.GetValidatorPerformance,
+			methods:  []string{http.MethodPost},
+		},
+	}
+}

beacon-chain/rpc/endpoints_test.go

@@ -0,0 +1,150 @@
+package rpc
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/prysmaticlabs/prysm/v5/testing/assert"
+)
+
+func Test_endpoints(t *testing.T) {
+	rewardsRoutes := map[string][]string{
+		"/eth/v1/beacon/rewards/blocks/{block_id}":         {http.MethodGet},
+		"/eth/v1/beacon/rewards/attestations/{epoch}":      {http.MethodPost},
+		"/eth/v1/beacon/rewards/sync_committee/{block_id}": {http.MethodPost},
+	}
+
+	beaconRoutes := map[string][]string{
+		"/eth/v1/beacon/genesis":                                     {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/root":                      {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/fork":                      {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/finality_checkpoints":      {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/validators":                {http.MethodGet, http.MethodPost},
+		"/eth/v1/beacon/states/{state_id}/validators/{validator_id}": {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/validator_balances":        {http.MethodGet, http.MethodPost},
+		"/eth/v1/beacon/states/{state_id}/committees":                {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/sync_committees":           {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/randao":                    {http.MethodGet},
+		"/eth/v1/beacon/headers":                                     {http.MethodGet},
+		"/eth/v1/beacon/headers/{block_id}":                          {http.MethodGet},
+		"/eth/v1/beacon/blinded_blocks":                              {http.MethodPost},
+		"/eth/v2/beacon/blinded_blocks":                              {http.MethodPost},
+		"/eth/v1/beacon/blocks":                                      {http.MethodPost},
+		"/eth/v2/beacon/blocks":                                      {http.MethodPost},
+		"/eth/v1/beacon/blocks/{block_id}":                           {http.MethodGet},
+		"/eth/v2/beacon/blocks/{block_id}":                           {http.MethodGet},
+		"/eth/v1/beacon/blocks/{block_id}/root":                      {http.MethodGet},
+		"/eth/v1/beacon/blocks/{block_id}/attestations":              {http.MethodGet},
+		"/eth/v1/beacon/blob_sidecars/{block_id}":                    {http.MethodGet},
+		"/eth/v1/beacon/deposit_snapshot":                            {http.MethodGet},
+		"/eth/v1/beacon/blinded_blocks/{block_id}":                   {http.MethodGet},
+		"/eth/v1/beacon/pool/attestations":                           {http.MethodGet, http.MethodPost},
+		"/eth/v1/beacon/pool/attester_slashings":                     {http.MethodGet, http.MethodPost},
+		"/eth/v1/beacon/pool/proposer_slashings":                     {http.MethodGet, http.MethodPost},
+		"/eth/v1/beacon/pool/sync_committees":                        {http.MethodPost},
+		"/eth/v1/beacon/pool/voluntary_exits":                        {http.MethodGet, http.MethodPost},
+		"/eth/v1/beacon/pool/bls_to_execution_changes":               {http.MethodGet, http.MethodPost},
+	}
+
+	lightClientRoutes := map[string][]string{
+		"/eth/v1/beacon/light_client/bootstrap/{block_root}": {http.MethodGet},
+		"/eth/v1/beacon/light_client/updates":                {http.MethodGet},
+		"/eth/v1/beacon/light_client/finality_update":        {http.MethodGet},
+		"/eth/v1/beacon/light_client/optimistic_update":      {http.MethodGet},
+	}
+
+	builderRoutes := map[string][]string{
+		"/eth/v1/builder/states/{state_id}/expected_withdrawals": {http.MethodGet},
+	}
+
+	blobRoutes := map[string][]string{
+		"/eth/v1/beacon/blob_sidecars/{block_id}": {http.MethodGet},
+	}
+
+	configRoutes := map[string][]string{
+		"/eth/v1/config/fork_schedule":    {http.MethodGet},
+		"/eth/v1/config/spec":             {http.MethodGet},
+		"/eth/v1/config/deposit_contract": {http.MethodGet},
+	}
+
+	debugRoutes := map[string][]string{
+		"/eth/v1/debug/beacon/states/{state_id}": {http.MethodGet},
+		"/eth/v2/debug/beacon/states/{state_id}": {http.MethodGet},
+		"/eth/v2/debug/beacon/heads":             {http.MethodGet},
+		"/eth/v1/debug/fork_choice":              {http.MethodGet},
+	}
+
+	eventsRoutes := map[string][]string{
+		"/eth/v1/events": {http.MethodGet},
+	}
+
+	nodeRoutes := map[string][]string{
+		"/eth/v1/node/identity":        {http.MethodGet},
+		"/eth/v1/node/peers":           {http.MethodGet},
+		"/eth/v1/node/peers/{peer_id}": {http.MethodGet},
+		"/eth/v1/node/peer_count":      {http.MethodGet},
+		"/eth/v1/node/version":         {http.MethodGet},
+		"/eth/v1/node/syncing":         {http.MethodGet},
+		"/eth/v1/node/health":          {http.MethodGet},
+	}
+
+	validatorRoutes := map[string][]string{
+		"/eth/v1/validator/duties/attester/{epoch}":        {http.MethodPost},
+		"/eth/v1/validator/duties/proposer/{epoch}":        {http.MethodGet},
+		"/eth/v1/validator/duties/sync/{epoch}":            {http.MethodPost},
+		"/eth/v2/validator/blocks/{slot}":                  {http.MethodGet},
+		"/eth/v3/validator/blocks/{slot}":                  {http.MethodGet},
+		"/eth/v1/validator/blinded_blocks/{slot}":          {http.MethodGet},
+		"/eth/v1/validator/attestation_data":               {http.MethodGet},
+		"/eth/v1/validator/aggregate_attestation":          {http.MethodGet},
+		"/eth/v1/validator/aggregate_and_proofs":           {http.MethodPost},
+		"/eth/v1/validator/beacon_committee_subscriptions": {http.MethodPost},
+		"/eth/v1/validator/sync_committee_subscriptions":   {http.MethodPost},
+		"/eth/v1/validator/beacon_committee_selections":    {http.MethodPost},
+		"/eth/v1/validator/sync_committee_selections":      {http.MethodPost},
+		"/eth/v1/validator/sync_committee_contribution":    {http.MethodGet},
+		"/eth/v1/validator/contribution_and_proofs":        {http.MethodPost},
+		"/eth/v1/validator/prepare_beacon_proposer":        {http.MethodPost},
+		"/eth/v1/validator/register_validator":             {http.MethodPost},
+		"/eth/v1/validator/liveness/{epoch}":               {http.MethodPost},
+	}
+
+	prysmBeaconRoutes := map[string][]string{
+		"/prysm/v1/beacon/weak_subjectivity":                 {http.MethodGet},
+		"/eth/v1/beacon/states/{state_id}/validator_count":   {http.MethodGet},
+		"/prysm/v1/beacon/states/{state_id}/validator_count": {http.MethodGet},
+	}
+
+	prysmNodeRoutes := map[string][]string{
+		"/prysm/node/trusted_peers":              {http.MethodGet, http.MethodPost},
+		"/prysm/v1/node/trusted_peers":           {http.MethodGet, http.MethodPost},
+		"/prysm/node/trusted_peers/{peer_id}":    {http.MethodDelete},
+		"/prysm/v1/node/trusted_peers/{peer_id}": {http.MethodDelete},
+	}
+
+	prysmValidatorRoutes := map[string][]string{
+		"/prysm/validators/performance":    {http.MethodPost},
+		"/prysm/v1/validators/performance": {http.MethodPost},
+	}
+
+	s := &Service{cfg: &Config{}}
+
+	routesMap := combineMaps(beaconRoutes, builderRoutes, configRoutes, debugRoutes, eventsRoutes, nodeRoutes, validatorRoutes, rewardsRoutes, lightClientRoutes, blobRoutes, prysmValidatorRoutes, prysmNodeRoutes, prysmBeaconRoutes)
+	actual := s.endpoints(true, nil, nil, nil, nil, nil, nil)
+	for _, e := range actual {
+		methods, ok := routesMap[e.template]
+		assert.Equal(t, true, ok, "endpoint "+e.template+" not found")
+		if ok {
+			for _, em := range e.methods {
+				methodFound := false
+				for _, m := range methods {
+					if m == em {
+						methodFound = true
+						break
+					}
+				}
+				assert.Equal(t, true, methodFound, "method "+em+" for endpoint "+e.template+" not found")
+			}
+		}
+	}
+}

beacon-chain/rpc/eth/config/handlers_test.go

@@ -156,9 +156,6 @@ func TestGetSpec(t *testing.T) {
 	var dam [4]byte
 	copy(dam[:], []byte{'1', '0', '0', '0'})
 	config.DomainApplicationMask = dam
-	var dbs [4]byte
-	copy(dam[:], []byte{'2', '0', '0', '0'})
-	config.DomainBlobSidecar = dbs
 
 	params.OverrideBeaconConfig(config)
 
@@ -173,7 +170,7 @@ func TestGetSpec(t *testing.T) {
 	data, ok := resp.Data.(map[string]interface{})
 	require.Equal(t, true, ok)
 
-	assert.Equal(t, 130, len(data))
+	assert.Equal(t, 129, len(data))
 	for k, v := range data {
 		switch k {
 		case "CONFIG_NAME":

beacon-chain/rpc/eth/events/BUILD.bazel

@@ -25,7 +25,7 @@ go_library(
         "//runtime/version:go_default_library",
         "//time/slots:go_default_library",
         "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
-        "@com_github_sirupsen_logrus//:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
         "@io_opencensus_go//trace:go_default_library",
     ],
 )

beacon-chain/rpc/eth/events/events.go

@@ -8,6 +8,7 @@ import (
 	time2 "time"
 
 	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/pkg/errors"
 	"github.com/prysmaticlabs/prysm/v5/api"
 	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain"
@@ -23,7 +24,6 @@ import (
 	ethpbv2 "github.com/prysmaticlabs/prysm/v5/proto/eth/v2"
 	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
-	log "github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 )
 
@@ -124,86 +124,93 @@ func (s *Server) StreamEvents(w http.ResponseWriter, r *http.Request) {
 	// stalling while waiting for the first response chunk.
 	// After that we send a keepalive dummy message every SECONDS_PER_SLOT
 	// to prevent anyone (e.g. proxy servers) from closing connections.
-	sendKeepalive(w, flusher)
+	if err := sendKeepalive(w, flusher); err != nil {
+		httputil.HandleError(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
 	keepaliveTicker := time2.NewTicker(time2.Duration(params.BeaconConfig().SecondsPerSlot) * time2.Second)
+
 	for {
 		select {
 		case event := <-opsChan:
-			handleBlockOperationEvents(w, flusher, topicsMap, event)
+			if err := handleBlockOperationEvents(w, flusher, topicsMap, event); err != nil {
+				httputil.HandleError(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
 		case event := <-stateChan:
-			s.handleStateEvents(ctx, w, flusher, topicsMap, event)
+			if err := s.handleStateEvents(ctx, w, flusher, topicsMap, event); err != nil {
+				httputil.HandleError(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
 		case <-keepaliveTicker.C:
-			sendKeepalive(w, flusher)
+			if err := sendKeepalive(w, flusher); err != nil {
+				httputil.HandleError(w, err.Error(), http.StatusInternalServerError)
+				return
+			}
 		case <-ctx.Done():
 			return
 		}
 	}
 }
 
-func handleBlockOperationEvents(w http.ResponseWriter, flusher http.Flusher, requestedTopics map[string]bool, event *feed.Event) {
+func handleBlockOperationEvents(w http.ResponseWriter, flusher http.Flusher, requestedTopics map[string]bool, event *feed.Event) error {
 	switch event.Type {
 	case operation.AggregatedAttReceived:
 		if _, ok := requestedTopics[AttestationTopic]; !ok {
-			return
+			return nil
 		}
 		attData, ok := event.Data.(*operation.AggregatedAttReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, AttestationTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, AttestationTopic)
 		}
 		att := structs.AttFromConsensus(attData.Attestation.Aggregate)
-		send(w, flusher, AttestationTopic, att)
+		return send(w, flusher, AttestationTopic, att)
 	case operation.UnaggregatedAttReceived:
 		if _, ok := requestedTopics[AttestationTopic]; !ok {
-			return
+			return nil
 		}
 		attData, ok := event.Data.(*operation.UnAggregatedAttReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, AttestationTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, AttestationTopic)
 		}
 		att := structs.AttFromConsensus(attData.Attestation)
-		send(w, flusher, AttestationTopic, att)
+		return send(w, flusher, AttestationTopic, att)
 	case operation.ExitReceived:
 		if _, ok := requestedTopics[VoluntaryExitTopic]; !ok {
-			return
+			return nil
 		}
 		exitData, ok := event.Data.(*operation.ExitReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, VoluntaryExitTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, VoluntaryExitTopic)
 		}
 		exit := structs.SignedExitFromConsensus(exitData.Exit)
-		send(w, flusher, VoluntaryExitTopic, exit)
+		return send(w, flusher, VoluntaryExitTopic, exit)
 	case operation.SyncCommitteeContributionReceived:
 		if _, ok := requestedTopics[SyncCommitteeContributionTopic]; !ok {
-			return
+			return nil
 		}
 		contributionData, ok := event.Data.(*operation.SyncCommitteeContributionReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, SyncCommitteeContributionTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, SyncCommitteeContributionTopic)
 		}
 		contribution := structs.SignedContributionAndProofFromConsensus(contributionData.Contribution)
-		send(w, flusher, SyncCommitteeContributionTopic, contribution)
+		return send(w, flusher, SyncCommitteeContributionTopic, contribution)
 	case operation.BLSToExecutionChangeReceived:
 		if _, ok := requestedTopics[BLSToExecutionChangeTopic]; !ok {
-			return
+			return nil
 		}
 		changeData, ok := event.Data.(*operation.BLSToExecutionChangeReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, BLSToExecutionChangeTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, BLSToExecutionChangeTopic)
 		}
-		send(w, flusher, BLSToExecutionChangeTopic, structs.SignedBLSChangeFromConsensus(changeData.Change))
+		return send(w, flusher, BLSToExecutionChangeTopic, structs.SignedBLSChangeFromConsensus(changeData.Change))
 	case operation.BlobSidecarReceived:
 		if _, ok := requestedTopics[BlobSidecarTopic]; !ok {
-			return
+			return nil
 		}
 		blobData, ok := event.Data.(*operation.BlobSidecarReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, BlobSidecarTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, BlobSidecarTopic)
 		}
 		versionedHash := blockchain.ConvertKzgCommitmentToVersionedHash(blobData.Blob.KzgCommitment)
 		blobEvent := &structs.BlobSidecarEvent{
@@ -213,38 +220,36 @@ func handleBlockOperationEvents(w http.ResponseWriter, flusher http.Flusher, req
 			VersionedHash: versionedHash.String(),
 			KzgCommitment: hexutil.Encode(blobData.Blob.KzgCommitment),
 		}
-		send(w, flusher, BlobSidecarTopic, blobEvent)
+		return send(w, flusher, BlobSidecarTopic, blobEvent)
 	case operation.AttesterSlashingReceived:
 		if _, ok := requestedTopics[AttesterSlashingTopic]; !ok {
-			return
+			return nil
 		}
 		attesterSlashingData, ok := event.Data.(*operation.AttesterSlashingReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, AttesterSlashingTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, AttesterSlashingTopic)
 		}
-		send(w, flusher, AttesterSlashingTopic, structs.AttesterSlashingFromConsensus(attesterSlashingData.AttesterSlashing))
+		return send(w, flusher, AttesterSlashingTopic, structs.AttesterSlashingFromConsensus(attesterSlashingData.AttesterSlashing))
 	case operation.ProposerSlashingReceived:
 		if _, ok := requestedTopics[ProposerSlashingTopic]; !ok {
-			return
+			return nil
 		}
 		proposerSlashingData, ok := event.Data.(*operation.ProposerSlashingReceivedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, ProposerSlashingTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, ProposerSlashingTopic)
 		}
-		send(w, flusher, ProposerSlashingTopic, structs.ProposerSlashingFromConsensus(proposerSlashingData.ProposerSlashing))
+		return send(w, flusher, ProposerSlashingTopic, structs.ProposerSlashingFromConsensus(proposerSlashingData.ProposerSlashing))
 	}
+	return nil
 }
 
-func (s *Server) handleStateEvents(ctx context.Context, w http.ResponseWriter, flusher http.Flusher, requestedTopics map[string]bool, event *feed.Event) {
+func (s *Server) handleStateEvents(ctx context.Context, w http.ResponseWriter, flusher http.Flusher, requestedTopics map[string]bool, event *feed.Event) error {
 	switch event.Type {
 	case statefeed.NewHead:
 		if _, ok := requestedTopics[HeadTopic]; ok {
 			headData, ok := event.Data.(*ethpb.EventHead)
 			if !ok {
-				write(w, flusher, topicDataMismatch, event.Data, HeadTopic)
-				return
+				return write(w, flusher, topicDataMismatch, event.Data, HeadTopic)
 			}
 			head := &structs.HeadEvent{
 				Slot:                      fmt.Sprintf("%d", headData.Slot),
@@ -255,23 +260,22 @@ func (s *Server) handleStateEvents(ctx context.Context, w http.ResponseWriter, f
 				PreviousDutyDependentRoot: hexutil.Encode(headData.PreviousDutyDependentRoot),
 				CurrentDutyDependentRoot:  hexutil.Encode(headData.CurrentDutyDependentRoot),
 			}
-			send(w, flusher, HeadTopic, head)
+			return send(w, flusher, HeadTopic, head)
 		}
 		if _, ok := requestedTopics[PayloadAttributesTopic]; ok {
-			s.sendPayloadAttributes(ctx, w, flusher)
+			return s.sendPayloadAttributes(ctx, w, flusher)
 		}
 	case statefeed.MissedSlot:
 		if _, ok := requestedTopics[PayloadAttributesTopic]; ok {
-			s.sendPayloadAttributes(ctx, w, flusher)
+			return s.sendPayloadAttributes(ctx, w, flusher)
 		}
 	case statefeed.FinalizedCheckpoint:
 		if _, ok := requestedTopics[FinalizedCheckpointTopic]; !ok {
-			return
+			return nil
 		}
 		checkpointData, ok := event.Data.(*ethpb.EventFinalizedCheckpoint)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, FinalizedCheckpointTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, FinalizedCheckpointTopic)
 		}
 		checkpoint := &structs.FinalizedCheckpointEvent{
 			Block:               hexutil.Encode(checkpointData.Block),
@@ -279,15 +283,14 @@ func (s *Server) handleStateEvents(ctx context.Context, w http.ResponseWriter, f
 			Epoch:               fmt.Sprintf("%d", checkpointData.Epoch),
 			ExecutionOptimistic: checkpointData.ExecutionOptimistic,
 		}
-		send(w, flusher, FinalizedCheckpointTopic, checkpoint)
+		return send(w, flusher, FinalizedCheckpointTopic, checkpoint)
 	case statefeed.LightClientFinalityUpdate:
 		if _, ok := requestedTopics[LightClientFinalityUpdateTopic]; !ok {
-			return
+			return nil
 		}
 		updateData, ok := event.Data.(*ethpbv2.LightClientFinalityUpdateWithVersion)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, LightClientFinalityUpdateTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, LightClientFinalityUpdateTopic)
 		}
 
 		var finalityBranch []string
@@ -318,15 +321,14 @@ func (s *Server) handleStateEvents(ctx context.Context, w http.ResponseWriter, f
 				SignatureSlot: fmt.Sprintf("%d", updateData.Data.SignatureSlot),
 			},
 		}
-		send(w, flusher, LightClientFinalityUpdateTopic, update)
+		return send(w, flusher, LightClientFinalityUpdateTopic, update)
 	case statefeed.LightClientOptimisticUpdate:
 		if _, ok := requestedTopics[LightClientOptimisticUpdateTopic]; !ok {
-			return
+			return nil
 		}
 		updateData, ok := event.Data.(*ethpbv2.LightClientOptimisticUpdateWithVersion)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, LightClientOptimisticUpdateTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, LightClientOptimisticUpdateTopic)
 		}
 		update := &structs.LightClientOptimisticUpdateEvent{
 			Version: version.String(int(updateData.Version)),
@@ -345,15 +347,14 @@ func (s *Server) handleStateEvents(ctx context.Context, w http.ResponseWriter, f
 				SignatureSlot: fmt.Sprintf("%d", updateData.Data.SignatureSlot),
 			},
 		}
-		send(w, flusher, LightClientOptimisticUpdateTopic, update)
+		return send(w, flusher, LightClientOptimisticUpdateTopic, update)
 	case statefeed.Reorg:
 		if _, ok := requestedTopics[ChainReorgTopic]; !ok {
-			return
+			return nil
 		}
 		reorgData, ok := event.Data.(*ethpb.EventChainReorg)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, ChainReorgTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, ChainReorgTopic)
 		}
 		reorg := &structs.ChainReorgEvent{
 			Slot:                fmt.Sprintf("%d", reorgData.Slot),
@@ -365,78 +366,69 @@ func (s *Server) handleStateEvents(ctx context.Context, w http.ResponseWriter, f
 			Epoch:               fmt.Sprintf("%d", reorgData.Epoch),
 			ExecutionOptimistic: reorgData.ExecutionOptimistic,
 		}
-		send(w, flusher, ChainReorgTopic, reorg)
+		return send(w, flusher, ChainReorgTopic, reorg)
 	case statefeed.BlockProcessed:
 		if _, ok := requestedTopics[BlockTopic]; !ok {
-			return
+			return nil
 		}
 		blkData, ok := event.Data.(*statefeed.BlockProcessedData)
 		if !ok {
-			write(w, flusher, topicDataMismatch, event.Data, BlockTopic)
-			return
+			return write(w, flusher, topicDataMismatch, event.Data, BlockTopic)
 		}
 		blockRoot, err := blkData.SignedBlock.Block().HashTreeRoot()
 		if err != nil {
-			write(w, flusher, "Could not get block root: "+err.Error())
-			return
+			return write(w, flusher, "Could not get block root: "+err.Error())
 		}
 		blk := &structs.BlockEvent{
 			Slot:                fmt.Sprintf("%d", blkData.Slot),
 			Block:               hexutil.Encode(blockRoot[:]),
 			ExecutionOptimistic: blkData.Optimistic,
 		}
-		send(w, flusher, BlockTopic, blk)
+		return send(w, flusher, BlockTopic, blk)
 	}
+	return nil
 }
 
 // This event stream is intended to be used by builders and relays.
 // Parent fields are based on state at N_{current_slot}, while the rest of fields are based on state of N_{current_slot + 1}
-func (s *Server) sendPayloadAttributes(ctx context.Context, w http.ResponseWriter, flusher http.Flusher) {
+func (s *Server) sendPayloadAttributes(ctx context.Context, w http.ResponseWriter, flusher http.Flusher) error {
 	headRoot, err := s.HeadFetcher.HeadRoot(ctx)
 	if err != nil {
-		write(w, flusher, "Could not get head root: "+err.Error())
-		return
+		return write(w, flusher, "Could not get head root: "+err.Error())
 	}
 	st, err := s.HeadFetcher.HeadState(ctx)
 	if err != nil {
-		write(w, flusher, "Could not get head state: "+err.Error())
-		return
+		return write(w, flusher, "Could not get head state: "+err.Error())
 	}
 	// advance the head state
 	headState, err := transition.ProcessSlotsIfPossible(ctx, st, s.ChainInfoFetcher.CurrentSlot()+1)
 	if err != nil {
-		write(w, flusher, "Could not advance head state: "+err.Error())
-		return
+		return write(w, flusher, "Could not advance head state: "+err.Error())
 	}
 
 	headBlock, err := s.HeadFetcher.HeadBlock(ctx)
 	if err != nil {
-		write(w, flusher, "Could not get head block: "+err.Error())
-		return
+		return write(w, flusher, "Could not get head block: "+err.Error())
 	}
 
 	headPayload, err := headBlock.Block().Body().Execution()
 	if err != nil {
-		write(w, flusher, "Could not get execution payload: "+err.Error())
-		return
+		return write(w, flusher, "Could not get execution payload: "+err.Error())
 	}
 
 	t, err := slots.ToTime(headState.GenesisTime(), headState.Slot())
 	if err != nil {
-		write(w, flusher, "Could not get head state slot time: "+err.Error())
-		return
+		return write(w, flusher, "Could not get head state slot time: "+err.Error())
 	}
 
 	prevRando, err := helpers.RandaoMix(headState, time.CurrentEpoch(headState))
 	if err != nil {
-		write(w, flusher, "Could not get head state randao mix: "+err.Error())
-		return
+		return write(w, flusher, "Could not get head state randao mix: "+err.Error())
 	}
 
 	proposerIndex, err := helpers.BeaconProposerIndex(ctx, headState)
 	if err != nil {
-		write(w, flusher, "Could not get head state proposer index: "+err.Error())
-		return
+		return write(w, flusher, "Could not get head state proposer index: "+err.Error())
 	}
 
 	var attributes interface{}
@@ -450,8 +442,7 @@ func (s *Server) sendPayloadAttributes(ctx context.Context, w http.ResponseWrite
 	case version.Capella:
 		withdrawals, err := headState.ExpectedWithdrawals()
 		if err != nil {
-			write(w, flusher, "Could not get head state expected withdrawals: "+err.Error())
-			return
+			return write(w, flusher, "Could not get head state expected withdrawals: "+err.Error())
 		}
 		attributes = &structs.PayloadAttributesV2{
 			Timestamp:             fmt.Sprintf("%d", t.Unix()),
@@ -462,13 +453,11 @@ func (s *Server) sendPayloadAttributes(ctx context.Context, w http.ResponseWrite
 	case version.Deneb:
 		withdrawals, err := headState.ExpectedWithdrawals()
 		if err != nil {
-			write(w, flusher, "Could not get head state expected withdrawals: "+err.Error())
-			return
+			return write(w, flusher, "Could not get head state expected withdrawals: "+err.Error())
 		}
 		parentRoot, err := headBlock.Block().HashTreeRoot()
 		if err != nil {
-			write(w, flusher, "Could not get head block root: "+err.Error())
-			return
+			return write(w, flusher, "Could not get head block root: "+err.Error())
 		}
 		attributes = &structs.PayloadAttributesV3{
 			Timestamp:             fmt.Sprintf("%d", t.Unix()),
@@ -478,14 +467,12 @@ func (s *Server) sendPayloadAttributes(ctx context.Context, w http.ResponseWrite
 			ParentBeaconBlockRoot: hexutil.Encode(parentRoot[:]),
 		}
 	default:
-		write(w, flusher, "Payload version %s is not supported", version.String(headState.Version()))
-		return
+		return write(w, flusher, "Payload version %s is not supported", version.String(headState.Version()))
 	}
 
 	attributesBytes, err := json.Marshal(attributes)
 	if err != nil {
-		write(w, flusher, err.Error())
-		return
+		return write(w, flusher, err.Error())
 	}
 	eventData := structs.PayloadAttributesEventData{
 		ProposerIndex:     fmt.Sprintf("%d", proposerIndex),
@@ -497,32 +484,31 @@ func (s *Server) sendPayloadAttributes(ctx context.Context, w http.ResponseWrite
 	}
 	eventDataBytes, err := json.Marshal(eventData)
 	if err != nil {
-		write(w, flusher, err.Error())
-		return
+		return write(w, flusher, err.Error())
 	}
-	send(w, flusher, PayloadAttributesTopic, &structs.PayloadAttributesEvent{
+	return send(w, flusher, PayloadAttributesTopic, &structs.PayloadAttributesEvent{
 		Version: version.String(headState.Version()),
 		Data:    eventDataBytes,
 	})
 }
 
-func send(w http.ResponseWriter, flusher http.Flusher, name string, data interface{}) {
+func send(w http.ResponseWriter, flusher http.Flusher, name string, data interface{}) error {
 	j, err := json.Marshal(data)
 	if err != nil {
-		write(w, flusher, "Could not marshal event to JSON: "+err.Error())
-		return
+		return write(w, flusher, "Could not marshal event to JSON: "+err.Error())
 	}
-	write(w, flusher, "event: %s\ndata: %s\n\n", name, string(j))
+	return write(w, flusher, "event: %s\ndata: %s\n\n", name, string(j))
 }
 
-func sendKeepalive(w http.ResponseWriter, flusher http.Flusher) {
-	write(w, flusher, ":\n\n")
+func sendKeepalive(w http.ResponseWriter, flusher http.Flusher) error {
+	return write(w, flusher, ":\n\n")
 }
 
-func write(w http.ResponseWriter, flusher http.Flusher, format string, a ...any) {
+func write(w http.ResponseWriter, flusher http.Flusher, format string, a ...any) error {
 	_, err := fmt.Fprintf(w, format, a...)
 	if err != nil {
-		log.WithError(err).Error("Could not write to response writer")
+		return errors.Wrap(err, "could not write to response writer")
 	}
 	flusher.Flush()
+	return nil
 }

beacon-chain/rpc/eth/validator/handlers_test.go

@@ -838,10 +838,14 @@ func TestGetAttestationData(t *testing.T) {
 		justifiedRoot, err := justifiedBlock.Block.HashTreeRoot()
 		require.NoError(t, err, "Could not get signing root for justified block")
 		slot := 3*params.BeaconConfig().SlotsPerEpoch + 1
+		beaconState, err := util.NewBeaconState()
+		require.NoError(t, err)
+		require.NoError(t, beaconState.SetSlot(slot))
 		justifiedCheckpoint := &ethpbalpha.Checkpoint{
 			Epoch: 2,
 			Root:  justifiedRoot[:],
 		}
+		require.NoError(t, beaconState.SetCurrentJustifiedCheckpoint(justifiedCheckpoint))
 		offset := int64(slot.Mul(params.BeaconConfig().SecondsPerSlot))
 		chain := &mockChain.ChainService{
 			Optimistic:                 false,
@@ -849,6 +853,7 @@ func TestGetAttestationData(t *testing.T) {
 			Root:                       blockRoot[:],
 			CurrentJustifiedCheckPoint: justifiedCheckpoint,
 			TargetRoot:                 blockRoot,
+			State:                      beaconState,
 		}
 
 		s := &Server{
@@ -1076,10 +1081,14 @@ func TestGetAttestationData(t *testing.T) {
 		justifiedRoot, err := justifiedBlock.Block.HashTreeRoot()
 		require.NoError(t, err, "Could not get signing root for justified block")
 
+		beaconState, err := util.NewBeaconState()
+		require.NoError(t, err)
+		require.NoError(t, beaconState.SetSlot(slot))
 		justifiedCheckpt := &ethpbalpha.Checkpoint{
 			Epoch: 0,
 			Root:  justifiedRoot[:],
 		}
+		require.NoError(t, beaconState.SetCurrentJustifiedCheckpoint(justifiedCheckpt))
 		require.NoError(t, err)
 		offset := int64(slot.Mul(params.BeaconConfig().SecondsPerSlot))
 		chain := &mockChain.ChainService{
@@ -1087,6 +1096,7 @@ func TestGetAttestationData(t *testing.T) {
 			Genesis:                    time.Now().Add(time.Duration(-1*offset) * time.Second),
 			CurrentJustifiedCheckPoint: justifiedCheckpt,
 			TargetRoot:                 blockRoot,
+			State:                      beaconState,
 		}
 
 		s := &Server{
@@ -1163,17 +1173,24 @@ func TestGetAttestationData(t *testing.T) {
 		require.NoError(t, err, "Could not hash beacon block")
 		justifiedBlockRoot, err := justifiedBlock.Block.HashTreeRoot()
 		require.NoError(t, err, "Could not hash justified block")
+
+		slot := primitives.Slot(10000)
+		beaconState, err := util.NewBeaconState()
+		require.NoError(t, err)
+		require.NoError(t, beaconState.SetSlot(slot))
 		justifiedCheckpt := &ethpbalpha.Checkpoint{
 			Epoch: slots.ToEpoch(1500),
 			Root:  justifiedBlockRoot[:],
 		}
-		slot := primitives.Slot(10000)
+		require.NoError(t, beaconState.SetCurrentJustifiedCheckpoint(justifiedCheckpt))
+
 		offset := int64(slot.Mul(params.BeaconConfig().SecondsPerSlot))
 		chain := &mockChain.ChainService{
 			Root:                       blockRoot[:],
 			Genesis:                    time.Now().Add(time.Duration(-1*offset) * time.Second),
 			CurrentJustifiedCheckPoint: justifiedCheckpt,
 			TargetRoot:                 blockRoot,
+			State:                      beaconState,
 		}
 
 		s := &Server{

beacon-chain/rpc/prysm/v1alpha1/node/BUILD.bazel

@@ -18,8 +18,10 @@ go_library(
         "@com_github_golang_protobuf//ptypes/timestamp",
         "@com_github_libp2p_go_libp2p//core/network:go_default_library",
         "@com_github_libp2p_go_libp2p//core/peer:go_default_library",
+        "@io_opencensus_go//trace:go_default_library",
         "@org_golang_google_grpc//:go_default_library",
         "@org_golang_google_grpc//codes:go_default_library",
+        "@org_golang_google_grpc//metadata:go_default_library",
         "@org_golang_google_grpc//status:go_default_library",
         "@org_golang_google_protobuf//types/known/timestamppb:go_default_library",
     ],
@@ -45,7 +47,9 @@ go_test(
         "@com_github_ethereum_go_ethereum//common:go_default_library",
         "@com_github_ethereum_go_ethereum//crypto:go_default_library",
         "@com_github_ethereum_go_ethereum//p2p/enode:go_default_library",
+        "@com_github_grpc_ecosystem_grpc_gateway_v2//runtime:go_default_library",
         "@org_golang_google_grpc//:go_default_library",
+        "@org_golang_google_grpc//metadata:go_default_library",
         "@org_golang_google_grpc//reflection:go_default_library",
         "@org_golang_google_protobuf//types/known/emptypb:go_default_library",
         "@org_golang_google_protobuf//types/known/timestamppb:go_default_library",