Fix it For Real

* Add new DA check

* Exit early in the event no commitments exist.

* Gazelle

* Fix Mock Broadcaster

* Fix Test Setup

* Update beacon-chain/blockchain/process_block.go

Co-authored-by: Manu NALEPA <enalepa@offchainlabs.com>

* Manu's Review

* Fix Build

---------

Co-authored-by: Manu NALEPA <enalepa@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
 
@@ -16,6 +22,7 @@ coverage --define=coverage_enabled=1
 build --workspace_status_command=./hack/workspace_status.sh
 
 build --define blst_disabled=false
+build --compilation_mode=opt
 run --define blst_disabled=false
 
 build:blst_disabled --define blst_disabled=true

.bazelversion

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

.gitignore

@@ -41,3 +41,6 @@ jwt.hex
 
 # manual testing
 tmp
+
+# spectest coverage reports
+report.txt

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

@@ -16,34 +16,20 @@ 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),
     ],
 )
 
 load("@hermetic_cc_toolchain//toolchain:defs.bzl", zig_toolchains = "toolchains")
 
-# Temporarily use a nightly build until 0.12.0 is released.
-# See: https://github.com/prysmaticlabs/prysm/issues/13130
-zig_toolchains(
-    host_platform_sha256 = {
-        "linux-aarch64": "45afb8e32adde825165f4f293fcea9ecea503f7f9ec0e9bf4435afe70e67fb70",
-        "linux-x86_64": "f136c6a8a0f6adcb057d73615fbcd6f88281b3593f7008d5f7ed514ff925c02e",
-        "macos-aarch64": "05d995853c05243151deff47b60bdc2674f1e794a939eaeca0f42312da031cee",
-        "macos-x86_64": "721754ba5a50f31e8a1f0e1a74cace26f8246576878ac4a8591b0ee7b6db1fc1",
-        "windows-x86_64": "93f5248b2ea8c5ee8175e15b1384e133edc1cd49870b3ea259062a2e04164343",
-    },
-    url_formats = [
-        "https://ziglang.org/builds/zig-{host_platform}-{version}.{_ext}",
-        "https://mirror.bazel.build/ziglang.org/builds/zig-{host_platform}-{version}.{_ext}",
-        "https://prysmaticlabs.com/mirror/ziglang.org/builds/zig-{host_platform}-{version}.{_ext}",
-    ],
-    version = "0.12.0-dev.1349+fa022d1ec",
-)
+zig_toolchains()
 
 # Register zig sdk toolchains with support for Ubuntu 20.04 (Focal Fossa) which has an EOL date of April, 2025.
 # For ubuntu glibc support, see https://launchpad.net/ubuntu/+source/glibc
@@ -81,10 +67,10 @@ 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 +114,9 @@ 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 +137,13 @@ 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 +182,14 @@ 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 +227,7 @@ 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 = "v1.5.0-alpha.0"
 
 bls_test_version = "v0.1.1"
 
@@ -259,8 +243,8 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "c282c0f86f23f3d2e0f71f5975769a4077e62a7e3c7382a16bd26a7e589811a0",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_test_version,
+    sha256 = "33c5547772b6d8d6f041dff7e7d26b0358c2392daed34394a3aa81147812a81c",
+    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_version,
 )
 
 http_archive(
@@ -275,8 +259,8 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "4649c35aa3b8eb0cfdc81bee7c05649f90ef36bede5b0513e1f2e8baf37d6033",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_test_version,
+    sha256 = "06f286199cf2fedd4700487fb8feb0904e0ae18daaa4b3f70ea430ca9c388167",
+    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_version,
 )
 
 http_archive(
@@ -291,8 +275,8 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "c5a03f724f757456ffaabd2a899992a71d2baf45ee4db65ca3518f2b7ee928c8",
-    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_test_version,
+    sha256 = "5f2a4452b323075eba6bf950003f7d91fd04ebcbde5bd087beafb5d6f6325ad4",
+    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
 )
 
 http_archive(
@@ -306,7 +290,7 @@ filegroup(
     visibility = ["//visibility:public"],
 )
     """,
-    sha256 = "049c29267310e6b88280f4f834a75866c2f5b9036fa97acb9d9c6db8f64d9118",
+    sha256 = "fd7e83e8cbeb3e297f2aeb93776305f7d606272c97834d8d9be673984501ed36",
     strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
     url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )
@@ -342,22 +326,6 @@ filegroup(
     url = "https://github.com/eth-clients/eth2-networks/archive/934c948e69205dcf2deb87e4ae6cc140c335f94d.tar.gz",
 )
 
-http_archive(
-    name = "goerli_testnet",
-    build_file_content = """
-filegroup(
-    name = "configs",
-    srcs = [
-        "prater/config.yaml",
-    ],
-    visibility = ["//visibility:public"],
-)
-    """,
-    sha256 = "43fc0f55ddff7b511713e2de07aa22846a67432df997296fb4fc09cd8ed1dcdb",
-    strip_prefix = "goerli-6522ac6684693740cd4ddcc2a0662e03702aa4a1",
-    url = "https://github.com/eth-clients/goerli/archive/6522ac6684693740cd4ddcc2a0662e03702aa4a1.tar.gz",
-)
-
 http_archive(
     name = "holesky_testnet",
     build_file_content = """

api/BUILD.bazel

@@ -1,11 +1,24 @@
-load("@prysm//tools/go:def.bzl", "go_library")
+load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 
 go_library(
     name = "go_default_library",
     srcs = [
         "constants.go",
         "headers.go",
+        "jwt.go",
     ],
     importpath = "github.com/prysmaticlabs/prysm/v5/api",
     visibility = ["//visibility:public"],
+    deps = [
+        "//crypto/rand:go_default_library",
+        "@com_github_ethereum_go_ethereum//common/hexutil:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["jwt_test.go"],
+    embed = [":go_default_library"],
+    deps = ["//testing/require:go_default_library"],
 )

api/client/beacon/BUILD.bazel

@@ -6,12 +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",
@@ -37,10 +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",
@@ -54,5 +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/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/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))
+		}
+	}
+}

api/constants.go

@@ -4,4 +4,6 @@ const (
 	WebUrlPrefix        = "/v2/validator/"
 	WebApiUrlPrefix     = "/api/v2/validator/"
 	KeymanagerApiPrefix = "/eth/v1"
+
+	AuthTokenFileName = "auth-token"
 )

api/jwt.go

@@ -0,0 +1,32 @@
+package api
+
+import (
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/crypto/rand"
+)
+
+// GenerateRandomHexString generates a random hex string that follows the standards for jwt token
+// used for beacon node -> execution client
+// used for web client -> validator client
+func GenerateRandomHexString() (string, error) {
+	secret := make([]byte, 32)
+	randGen := rand.NewGenerator()
+	n, err := randGen.Read(secret)
+	if err != nil {
+		return "", err
+	} else if n != 32 {
+		return "", errors.New("rand: unexpected length")
+	}
+	return hexutil.Encode(secret), nil
+}
+
+// ValidateAuthToken validating auth token for web
+func ValidateAuthToken(token string) error {
+	b, err := hexutil.Decode(token)
+	// token should be hex-encoded and at least 256 bits
+	if err != nil || len(b) < 32 {
+		return errors.New("invalid auth token: token should be hex-encoded and at least 256 bits")
+	}
+	return nil
+}

api/jwt_test.go

@@ -0,0 +1,13 @@
+package api
+
+import (
+	"testing"
+
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+)
+
+func TestGenerateRandomHexString(t *testing.T) {
+	token, err := GenerateRandomHexString()
+	require.NoError(t, err)
+	require.NoError(t, ValidateAuthToken(token))
+}

async/abool/abool_test.go

@@ -88,7 +88,7 @@ func TestToggle(t *testing.T) {
 	}
 }
 
-func TestToogleMultipleTimes(t *testing.T) {
+func TestToggleMultipleTimes(t *testing.T) {
 	t.Parallel()
 
 	v := New()
@@ -101,16 +101,16 @@ func TestToogleMultipleTimes(t *testing.T) {
 
 		expected := i%2 != 0
 		if v.IsSet() != expected {
-			t.Fatalf("AtomicBool.Toogle() doesn't work after %d calls, expected: %v, got %v", i, expected, v.IsSet())
+			t.Fatalf("AtomicBool.Toggle() doesn't work after %d calls, expected: %v, got %v", i, expected, v.IsSet())
 		}
 
 		if pre == v.IsSet() {
-			t.Fatalf("AtomicBool.Toogle() returned wrong value at the %dth calls, expected: %v, got %v", i, !v.IsSet(), pre)
+			t.Fatalf("AtomicBool.Toggle() returned wrong value at the %dth calls, expected: %v, got %v", i, !v.IsSet(), pre)
 		}
 	}
 }
 
-func TestToogleAfterOverflow(t *testing.T) {
+func TestToggleAfterOverflow(t *testing.T) {
 	t.Parallel()
 
 	var value int32 = math.MaxInt32
@@ -122,7 +122,7 @@ func TestToogleAfterOverflow(t *testing.T) {
 	v.Toggle()
 	expected := math.MaxInt32%2 == 0
 	if v.IsSet() != expected {
-		t.Fatalf("AtomicBool.Toogle() doesn't work after overflow, expected: %v, got %v", expected, v.IsSet())
+		t.Fatalf("AtomicBool.Toggle() doesn't work after overflow, expected: %v, got %v", expected, v.IsSet())
 	}
 
 	// make sure overflow happened
@@ -135,7 +135,7 @@ func TestToogleAfterOverflow(t *testing.T) {
 	v.Toggle()
 	expected = !expected
 	if v.IsSet() != expected {
-		t.Fatalf("AtomicBool.Toogle() doesn't work after the second call after overflow, expected: %v, got %v", expected, v.IsSet())
+		t.Fatalf("AtomicBool.Toggle() doesn't work after the second call after overflow, expected: %v, got %v", expected, v.IsSet())
 	}
 }
 

async/event/feed.go

@@ -20,6 +20,7 @@ package event
 import (
 	"errors"
 	"reflect"
+	"slices"
 	"sync"
 )
 
@@ -219,12 +220,9 @@ type caseList []reflect.SelectCase
 
 // find returns the index of a case containing the given channel.
 func (cs caseList) find(channel interface{}) int {
-	for i, cas := range cs {
-		if cas.Chan.Interface() == channel {
-			return i
-		}
-	}
-	return -1
+	return slices.IndexFunc(cs, func(selectCase reflect.SelectCase) bool {
+		return selectCase.Chan.Interface() == channel
+	})
 }
 
 // delete removes the given case from cs.

async/scatter.go

@@ -63,7 +63,7 @@ func Scatter(inputLen int, sFunc func(int, int, *sync.RWMutex) (interface{}, err
 	return results, nil
 }
 
-// calculateChunkSize calculates a suitable chunk size for the purposes of parallelisation.
+// calculateChunkSize calculates a suitable chunk size for the purposes of parallelization.
 func calculateChunkSize(items int) int {
 	// Start with a simple even split
 	chunkSize := items / runtime.GOMAXPROCS(0)

bazel.sh

@@ -2,7 +2,7 @@
 
 # This script serves as a wrapper around bazel to limit the scope of environment variables that
 # may change the action output. Using this script should result in a higher cache hit ratio for
-# cached actions with a more heremtic build.
+# cached actions with a more hermetic build.
 
 env -i \
  PATH=/usr/bin:/bin \

beacon-chain/blockchain/BUILD.bazel

@@ -26,6 +26,7 @@ go_library(
         "receive_attestation.go",
         "receive_blob.go",
         "receive_block.go",
+        "receive_data_column.go",
         "service.go",
         "tracked_proposer.go",
         "weak_subjectivity_checks.go",
@@ -48,6 +49,7 @@ go_library(
         "//beacon-chain/core/feed:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/core/transition:go_default_library",
@@ -157,6 +159,7 @@ go_test(
         "//beacon-chain/operations/slashings:go_default_library",
         "//beacon-chain/operations/voluntaryexits:go_default_library",
         "//beacon-chain/p2p:go_default_library",
+        "//beacon-chain/p2p/testing:go_default_library",
         "//beacon-chain/startup:go_default_library",
         "//beacon-chain/state:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",

beacon-chain/blockchain/chain_info.go

@@ -11,7 +11,6 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	f "github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice"
 	doublylinkedtree "github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice/types"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state"
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
@@ -399,14 +398,6 @@ func (s *Service) InForkchoice(root [32]byte) bool {
 	return s.cfg.ForkChoiceStore.HasNode(root)
 }
 
-// IsViableForCheckpoint returns whether the given checkpoint is a checkpoint in any
-// chain known to forkchoice
-func (s *Service) IsViableForCheckpoint(cp *forkchoicetypes.Checkpoint) (bool, error) {
-	s.cfg.ForkChoiceStore.RLock()
-	defer s.cfg.ForkChoiceStore.RUnlock()
-	return s.cfg.ForkChoiceStore.IsViableForCheckpoint(cp)
-}
-
 // IsOptimisticForRoot takes the root as argument instead of the current head
 // and returns true if it is optimistic.
 func (s *Service) IsOptimisticForRoot(ctx context.Context, root [32]byte) (bool, error) {
@@ -518,13 +509,6 @@ func (s *Service) Ancestor(ctx context.Context, root []byte, slot primitives.Slo
 	return ar[:], nil
 }
 
-// SetOptimisticToInvalid wraps the corresponding method in forkchoice
-func (s *Service) SetOptimisticToInvalid(ctx context.Context, root, parent, lvh [32]byte) ([][32]byte, error) {
-	s.cfg.ForkChoiceStore.Lock()
-	defer s.cfg.ForkChoiceStore.Unlock()
-	return s.cfg.ForkChoiceStore.SetOptimisticToInvalid(ctx, root, parent, lvh)
-}
-
 // SetGenesisTime sets the genesis time of beacon chain.
 func (s *Service) SetGenesisTime(t time.Time) {
 	s.genesisTime = t
@@ -563,3 +547,9 @@ 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/error.go

@@ -33,6 +33,7 @@ var (
 )
 
 var errMaxBlobsExceeded = errors.New("Expected commitments in block exceeds MAX_BLOBS_PER_BLOCK")
+var errMaxDataColumnsExceeded = errors.New("Expected data columns for node exceeds NUMBER_OF_COLUMNS")
 
 // An invalid block is the block that fails state transition based on the core protocol rules.
 // The beacon node shall not be accepting nor building blocks that branch off from an invalid block.

beacon-chain/blockchain/execution_engine.go

@@ -256,7 +256,7 @@ func (s *Service) notifyNewPayload(ctx context.Context, preStateVersion int,
 // reportInvalidBlock deals with the event that an invalid block was detected by the execution layer
 func (s *Service) pruneInvalidBlock(ctx context.Context, root, parentRoot, lvh [32]byte) error {
 	newPayloadInvalidNodeCount.Inc()
-	invalidRoots, err := s.SetOptimisticToInvalid(ctx, root, parentRoot, lvh)
+	invalidRoots, err := s.cfg.ForkChoiceStore.SetOptimisticToInvalid(ctx, root, parentRoot, lvh)
 	if err != nil {
 		return err
 	}

beacon-chain/blockchain/head_sync_committee_info_test.go

@@ -61,7 +61,7 @@ func TestService_headNextSyncCommitteeIndices(t *testing.T) {
 	indices, err := c.headNextSyncCommitteeIndices(context.Background(), 0, primitives.Slot(slot))
 	require.NoError(t, err)
 
-	// NextSyncCommittee should be be empty after `ProcessSyncCommitteeUpdates`. Validator should get indices.
+	// NextSyncCommittee should be empty after `ProcessSyncCommitteeUpdates`. Validator should get indices.
 	require.NotEqual(t, 0, len(indices))
 }
 

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/options.go

@@ -118,9 +118,9 @@ func WithBLSToExecPool(p blstoexec.PoolManager) Option {
 }
 
 // WithP2PBroadcaster to broadcast messages after appropriate processing.
-func WithP2PBroadcaster(p p2p.Broadcaster) Option {
+func WithP2PBroadcaster(p p2p.Acceser) Option {
 	return func(s *Service) error {
-		s.cfg.P2p = p
+		s.cfg.P2P = p
 		return nil
 	}
 }

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 +6,8 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas"
+	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/blocks"
@@ -513,12 +515,35 @@ func missingIndices(bs *filesystem.BlobStorage, root [32]byte, expected [][]byte
 	return missing, nil
 }
 
+func missingDataColumns(bs *filesystem.BlobStorage, root [32]byte, expected map[uint64]bool) (map[uint64]bool, error) {
+	if len(expected) == 0 {
+		return nil, nil
+	}
+	if len(expected) > int(params.BeaconConfig().NumberOfColumns) {
+		return nil, errMaxDataColumnsExceeded
+	}
+	indices, err := bs.ColumnIndices(root)
+	if err != nil {
+		return nil, err
+	}
+	missing := make(map[uint64]bool, len(expected))
+	for col := range expected {
+		if !indices[col] {
+			missing[col] = true
+		}
+	}
+	return missing, nil
+}
+
 // isDataAvailable blocks until all BlobSidecars committed to in the block are available,
 // or an error or context cancellation occurs. A nil result means that the data availability check is successful.
 // The function will first check the database to see if all sidecars have been persisted. If any
 // sidecars are missing, it will then read from the blobNotifier channel for the given root until the channel is
 // closed, the context hits cancellation/timeout, or notifications have been received for all the missing sidecars.
 func (s *Service) isDataAvailable(ctx context.Context, root [32]byte, signed interfaces.ReadOnlySignedBeaconBlock) error {
+	if features.Get().EnablePeerDAS {
+		return s.isDataAvailableDataColumns(ctx, root, signed)
+	}
 	if signed.Version() < version.Deneb {
 		return nil
 	}
@@ -558,6 +583,20 @@ 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 +610,100 @@ 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 (s *Service) isDataAvailableDataColumns(ctx context.Context, root [32]byte, signed interfaces.ReadOnlySignedBeaconBlock) error {
+	if signed.Version() < version.Deneb {
+		return nil
+	}
+
+	block := signed.Block()
+	if block == nil {
+		return errors.New("invalid nil beacon block")
+	}
+	// We are only required to check within MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS
+	if !params.WithinDAPeriod(slots.ToEpoch(block.Slot()), slots.ToEpoch(s.CurrentSlot())) {
+		return nil
+	}
+	body := block.Body()
+	if body == nil {
+		return errors.New("invalid nil beacon block body")
+	}
+	kzgCommitments, err := body.BlobKzgCommitments()
+	if err != nil {
+		return errors.Wrap(err, "could not get KZG commitments")
+	}
+	// If block has not commitments there is nothing to wait for.
+	if len(kzgCommitments) == 0 {
+		return nil
+	}
+
+	colMap, err := peerdas.CustodyColumns(s.cfg.P2P.NodeID(), params.BeaconConfig().CustodyRequirement)
+	if err != nil {
+		return err
+	}
+	// expected is the number of custodied data columnns a node is expected to have.
+	expected := len(colMap)
+	if expected == 0 {
+		return nil
+	}
+	// get a map of data column indices that are not currently available.
+	missing, err := missingDataColumns(s.blobStorage, root, colMap)
+	if err != nil {
+		return err
+	}
+	// If there are no missing indices, all data column sidecars are available.
+	if len(missing) == 0 {
+		return nil
+	}
+
+	// The gossip handler for data columns writes the index of each verified data column 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:
+			// Delete each index seen in the notification channel.
+			delete(missing, idx)
+			// Read from the channel until there are no more missing sidecars.
+			if len(missing) > 0 {
+				continue
+			}
+			// Once all sidecars have been observed, clean up the notification channel.
+			s.blobNotifiers.delete(root)
+			return nil
+		case <-ctx.Done():
+			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_helpers.go

@@ -60,7 +60,7 @@ func (s *Service) getFCUArgsEarlyBlock(cfg *postBlockProcessConfig, fcuArgs *fcu
 
 // logNonCanonicalBlockReceived prints a message informing that the received
 // block is not the head of the chain. It requires the caller holds a lock on
-// Foprkchoice.
+// Forkchoice.
 func (s *Service) logNonCanonicalBlockReceived(blockRoot [32]byte, headRoot [32]byte) {
 	receivedWeight, err := s.cfg.ForkChoiceStore.Weight(blockRoot)
 	if err != nil {

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

@@ -50,6 +50,12 @@ type BlobReceiver interface {
 	ReceiveBlob(context.Context, blocks.VerifiedROBlob) error
 }
 
+// DataColumnReceiver interface defines the methods of chain service for receiving new
+// data columns
+type DataColumnReceiver interface {
+	ReceiveDataColumn(context.Context, blocks.VerifiedRODataColumn) error
+}
+
 // SlashingReceiver interface defines the methods of chain service for receiving validated slashing over the wire.
 type SlashingReceiver interface {
 	ReceiveAttesterSlashing(ctx context.Context, slashings *ethpb.AttesterSlashing)
@@ -170,7 +176,7 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig
 	// Send finalized events and finalized deposits in the background
 	if newFinalized {
 		finalized := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
-		go s.sendNewFinalizedEvent(blockCopy, postState)
+		go s.sendNewFinalizedEvent(ctx, postState)
 		depCtx, cancel := context.WithTimeout(context.Background(), depositDeadline)
 		go func() {
 			s.insertFinalizedDeposits(depCtx, finalized.Root)
@@ -443,7 +449,7 @@ func (s *Service) updateFinalizationOnBlock(ctx context.Context, preState, postS
 
 // sendNewFinalizedEvent sends a new finalization checkpoint event over the
 // event feed. It needs to be called on the background
-func (s *Service) sendNewFinalizedEvent(signed interfaces.ReadOnlySignedBeaconBlock, postState state.BeaconState) {
+func (s *Service) sendNewFinalizedEvent(ctx context.Context, postState state.BeaconState) {
 	isValidPayload := false
 	s.headLock.RLock()
 	if s.head != nil {
@@ -451,8 +457,17 @@ func (s *Service) sendNewFinalizedEvent(signed interfaces.ReadOnlySignedBeaconBl
 	}
 	s.headLock.RUnlock()
 
+	blk, err := s.cfg.BeaconDB.Block(ctx, bytesutil.ToBytes32(postState.FinalizedCheckpoint().Root))
+	if err != nil {
+		log.WithError(err).Error("Could not retrieve block for finalized checkpoint root. Finalized event will not be emitted")
+		return
+	}
+	if blk == nil || blk.IsNil() || blk.Block() == nil || blk.Block().IsNil() {
+		log.WithError(err).Error("Block retrieved for finalized checkpoint root is nil. Finalized event will not be emitted")
+		return
+	}
+	stateRoot := blk.Block().StateRoot()
 	// Send an event regarding the new finalized checkpoint over a common event feed.
-	stateRoot := signed.Block().StateRoot()
 	s.cfg.StateNotifier.StateFeed().Send(&feed.Event{
 		Type: statefeed.FinalizedCheckpoint,
 		Data: &ethpbv1.EventFinalizedCheckpoint{
@@ -488,7 +503,10 @@ func (s *Service) sendBlockAttestationsToSlasher(signed interfaces.ReadOnlySigne
 func (s *Service) validateExecutionOnBlock(ctx context.Context, ver int, header interfaces.ExecutionData, signed interfaces.ReadOnlySignedBeaconBlock, blockRoot [32]byte) (bool, error) {
 	isValidPayload, err := s.notifyNewPayload(ctx, ver, header, signed)
 	if err != nil {
-		return false, s.handleInvalidExecutionError(ctx, err, blockRoot, signed.Block().ParentRoot())
+		s.cfg.ForkChoiceStore.Lock()
+		err = s.handleInvalidExecutionError(ctx, err, blockRoot, signed.Block().ParentRoot())
+		s.cfg.ForkChoiceStore.Unlock()
+		return false, err
 	}
 	if signed.Version() < version.Capella && isValidPayload {
 		if err := s.validateMergeTransitionBlock(ctx, ver, header, signed); err != nil {

beacon-chain/blockchain/receive_block_test.go

@@ -8,12 +8,14 @@ import (
 
 	blockchainTesting "github.com/prysmaticlabs/prysm/v5/beacon-chain/blockchain/testing"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
+	statefeed "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/feed/state"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/das"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/operations/voluntaryexits"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	ethpbv1 "github.com/prysmaticlabs/prysm/v5/proto/eth/v1"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v5/testing/assert"
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
@@ -378,3 +380,38 @@ func TestHandleBlockBLSToExecutionChanges(t *testing.T) {
 		require.Equal(t, false, pool.ValidatorExists(idx))
 	})
 }
+
+func Test_sendNewFinalizedEvent(t *testing.T) {
+	s, _ := minimalTestService(t)
+	notifier := &blockchainTesting.MockStateNotifier{RecordEvents: true}
+	s.cfg.StateNotifier = notifier
+	finalizedSt, err := util.NewBeaconState()
+	require.NoError(t, err)
+	finalizedStRoot, err := finalizedSt.HashTreeRoot(s.ctx)
+	require.NoError(t, err)
+	b := util.NewBeaconBlock()
+	b.Block.StateRoot = finalizedStRoot[:]
+	sbb, err := blocks.NewSignedBeaconBlock(b)
+	require.NoError(t, err)
+	sbbRoot, err := sbb.Block().HashTreeRoot()
+	require.NoError(t, err)
+	require.NoError(t, s.cfg.BeaconDB.SaveBlock(s.ctx, sbb))
+	st, err := util.NewBeaconState()
+	require.NoError(t, err)
+	require.NoError(t, st.SetFinalizedCheckpoint(&ethpb.Checkpoint{
+		Epoch: 123,
+		Root:  sbbRoot[:],
+	}))
+
+	s.sendNewFinalizedEvent(s.ctx, st)
+
+	require.Equal(t, 1, len(notifier.ReceivedEvents()))
+	e := notifier.ReceivedEvents()[0]
+	assert.Equal(t, statefeed.FinalizedCheckpoint, int(e.Type))
+	fc, ok := e.Data.(*ethpbv1.EventFinalizedCheckpoint)
+	require.Equal(t, true, ok, "event has wrong data type")
+	assert.Equal(t, primitives.Epoch(123), fc.Epoch)
+	assert.DeepEqual(t, sbbRoot[:], fc.Block)
+	assert.DeepEqual(t, finalizedStRoot[:], fc.State)
+	assert.Equal(t, false, fc.ExecutionOptimistic)
+}

beacon-chain/blockchain/receive_data_column.go

@@ -0,0 +1,18 @@
+package blockchain
+
+import (
+	"context"
+
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+)
+
+func (s *Service) ReceiveDataColumn(ctx context.Context, ds blocks.VerifiedRODataColumn) error {
+	if err := s.blobStorage.SaveDataColumn(ds); err != nil {
+		return err
+	}
+
+	// TODO use a custom event or new method of for data columns. For speed
+	// we are simply reusing blob paths here.
+	s.sendNewBlobEvent(ds.BlockRoot(), uint64(ds.SignedBlockHeader.Header.Slot))
+	return nil
+}

beacon-chain/blockchain/service.go

@@ -82,7 +82,7 @@ type config struct {
 	ExitPool                voluntaryexits.PoolManager
 	SlashingPool            slashings.PoolManager
 	BLSToExecPool           blstoexec.PoolManager
-	P2p                     p2p.Broadcaster
+	P2P                     p2p.Acceser
 	MaxRoutines             int
 	StateNotifier           statefeed.Notifier
 	ForkChoiceStore         f.ForkChoicer
@@ -290,18 +290,10 @@ func (s *Service) StartFromSavedState(saved state.BeaconState) error {
 	fRoot := s.ensureRootNotZeros(bytesutil.ToBytes32(finalized.Root))
 	s.cfg.ForkChoiceStore.Lock()
 	defer s.cfg.ForkChoiceStore.Unlock()
-	if params.BeaconConfig().ConfigName != params.PraterName {
-		if err := s.cfg.ForkChoiceStore.UpdateJustifiedCheckpoint(s.ctx, &forkchoicetypes.Checkpoint{Epoch: justified.Epoch,
-			Root: bytesutil.ToBytes32(justified.Root)}); err != nil {
-			return errors.Wrap(err, "could not update forkchoice's justified checkpoint")
-		}
-	} else {
-		if err := s.cfg.ForkChoiceStore.UpdateJustifiedCheckpoint(s.ctx, &forkchoicetypes.Checkpoint{Epoch: finalized.Epoch,
-			Root: bytesutil.ToBytes32(finalized.Root)}); err != nil {
-			return errors.Wrap(err, "could not update forkchoice's justified checkpoint")
-		}
+	if err := s.cfg.ForkChoiceStore.UpdateJustifiedCheckpoint(s.ctx, &forkchoicetypes.Checkpoint{Epoch: justified.Epoch,
+		Root: bytesutil.ToBytes32(justified.Root)}); err != nil {
+		return errors.Wrap(err, "could not update forkchoice's justified checkpoint")
 	}
-
 	if err := s.cfg.ForkChoiceStore.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Epoch: finalized.Epoch,
 		Root: bytesutil.ToBytes32(finalized.Root)}); err != nil {
 		return errors.Wrap(err, "could not update forkchoice's finalized checkpoint")

beacon-chain/blockchain/service_test.go

@@ -95,7 +95,7 @@ func setupBeaconChain(t *testing.T, beaconDB db.Database) *Service {
 		WithAttestationPool(attestations.NewPool()),
 		WithSlashingPool(slashings.NewPool()),
 		WithExitPool(voluntaryexits.NewPool()),
-		WithP2PBroadcaster(&mockBroadcaster{}),
+		WithP2PBroadcaster(&mockAccesser{}),
 		WithStateNotifier(&mockBeaconNode{}),
 		WithForkChoiceStore(fc),
 		WithAttestationService(attService),

beacon-chain/blockchain/setup_test.go

@@ -18,6 +18,7 @@ import (
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/operations/attestations"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/operations/blstoexec"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p"
+	p2pTesting "github.com/prysmaticlabs/prysm/v5/beacon-chain/p2p/testing"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/startup"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/state/stategen"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
@@ -44,6 +45,11 @@ type mockBroadcaster struct {
 	broadcastCalled bool
 }
 
+type mockAccesser struct {
+	mockBroadcaster
+	p2pTesting.MockPeerManager
+}
+
 func (mb *mockBroadcaster) Broadcast(_ context.Context, _ proto.Message) error {
 	mb.broadcastCalled = true
 	return nil
@@ -64,6 +70,11 @@ func (mb *mockBroadcaster) BroadcastBlob(_ context.Context, _ uint64, _ *ethpb.B
 	return nil
 }
 
+func (mb *mockBroadcaster) BroadcastDataColumn(_ context.Context, _ uint64, _ *ethpb.DataColumnSidecar) error {
+	mb.broadcastCalled = true
+	return nil
+}
+
 func (mb *mockBroadcaster) BroadcastBLSChanges(_ context.Context, _ []*ethpb.SignedBLSToExecutionChange) {
 }
 

beacon-chain/blockchain/testing/mock.go

@@ -628,6 +628,11 @@ func (c *ChainService) ReceiveBlob(_ context.Context, b blocks.VerifiedROBlob) e
 	return nil
 }
 
+// ReceiveDataColumn implements the same method in chain service
+func (c *ChainService) ReceiveDataColumn(_ context.Context, _ blocks.VerifiedRODataColumn) error {
+	return nil
+}
+
 // TargetRootForEpoch mocks the same method in the chain service
 func (c *ChainService) TargetRootForEpoch(_ [32]byte, _ primitives.Epoch) ([32]byte, error) {
 	return c.TargetRoot, nil

beacon-chain/cache/BUILD.bazel

@@ -7,6 +7,7 @@ go_library(
         "active_balance_disabled.go",  # keep
         "attestation_data.go",
         "checkpoint_state.go",
+        "column_subnet_ids.go",
         "committee.go",
         "committee_disabled.go",  # keep
         "committees.go",

beacon-chain/cache/column_subnet_ids.go

@@ -0,0 +1,65 @@
+package cache
+
+import (
+	"sync"
+	"time"
+
+	"github.com/patrickmn/go-cache"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+)
+
+type columnSubnetIDs struct {
+	colSubCache *cache.Cache
+	colSubLock  sync.RWMutex
+}
+
+// ColumnSubnetIDs for column subnet participants
+var ColumnSubnetIDs = newColumnSubnetIDs()
+
+const columnKey = "columns"
+
+func newColumnSubnetIDs() *columnSubnetIDs {
+	epochDuration := time.Duration(params.BeaconConfig().SlotsPerEpoch.Mul(params.BeaconConfig().SecondsPerSlot))
+	// Set the default duration of a column subnet subscription as the column expiry period.
+	subLength := epochDuration * time.Duration(params.BeaconConfig().MinEpochsForDataColumnSidecarsRequest)
+	persistentCache := cache.New(subLength*time.Second, epochDuration*time.Second)
+	return &columnSubnetIDs{colSubCache: persistentCache}
+}
+
+// GetColumnSubnets retrieves the data column subnets.
+func (s *columnSubnetIDs) GetColumnSubnets() ([]uint64, bool, time.Time) {
+	s.colSubLock.RLock()
+	defer s.colSubLock.RUnlock()
+
+	id, duration, ok := s.colSubCache.GetWithExpiration(columnKey)
+	if !ok {
+		return nil, false, time.Time{}
+	}
+	// Retrieve indices from the cache.
+	idxs, ok := id.([]uint64)
+	if !ok {
+		return nil, false, time.Time{}
+	}
+
+	return idxs, ok, duration
+}
+
+// AddColumnSubnets adds the relevant data column subnets.
+func (s *columnSubnetIDs) AddColumnSubnets(colIdx []uint64) {
+	s.colSubLock.Lock()
+	defer s.colSubLock.Unlock()
+
+	s.colSubCache.Set(columnKey, colIdx, 0)
+}
+
+// EmptyAllCaches empties out all the related caches and flushes any stored
+// entries on them. This should only ever be used for testing, in normal
+// production, handling of the relevant subnets for each role is done
+// separately.
+func (s *columnSubnetIDs) EmptyAllCaches() {
+	// Clear the cache.
+	s.colSubLock.Lock()
+	defer s.colSubLock.Unlock()
+
+	s.colSubCache.Flush()
+}

beacon-chain/cache/depositcache/deposits_cache_test.go

@@ -804,7 +804,7 @@ func TestFinalizedDeposits_ReturnsTrieCorrectly(t *testing.T) {
 	depositTrie, err := trie.GenerateTrieFromItems(trieItems, params.BeaconConfig().DepositContractTreeDepth)
 	assert.NoError(t, err)
 
-	// Perform this in a non-sensical ordering
+	// Perform this in a nonsensical ordering
 	require.NoError(t, dc.InsertFinalizedDeposits(context.Background(), 10, [32]byte{}, 0))
 	require.NoError(t, dc.InsertFinalizedDeposits(context.Background(), 2, [32]byte{}, 0))
 	require.NoError(t, dc.InsertFinalizedDeposits(context.Background(), 3, [32]byte{}, 0))

beacon-chain/cache/depositsnapshot/deposit_cache_test.go

@@ -784,7 +784,7 @@ func TestFinalizedDeposits_ReturnsTrieCorrectly(t *testing.T) {
 	depositTrie, err := trie.GenerateTrieFromItems(trieItems, params.BeaconConfig().DepositContractTreeDepth)
 	assert.NoError(t, err)
 
-	// Perform this in a non-sensical ordering
+	// Perform this in a nonsensical ordering
 	err = dc.InsertFinalizedDeposits(context.Background(), 1, [32]byte{}, 0)
 	require.NoError(t, err)
 	err = dc.InsertFinalizedDeposits(context.Background(), 2, [32]byte{}, 0)

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/blocks/signature.go

@@ -96,6 +96,24 @@ func VerifyBlockHeaderSignature(beaconState state.BeaconState, header *ethpb.Sig
 	return signing.VerifyBlockHeaderSigningRoot(header.Header, proposerPubKey, header.Signature, domain)
 }
 
+func VerifyBlockHeaderSignatureUsingCurrentFork(beaconState state.BeaconState, header *ethpb.SignedBeaconBlockHeader) error {
+	currentEpoch := slots.ToEpoch(header.Header.Slot)
+	fork, err := forks.Fork(currentEpoch)
+	if err != nil {
+		return err
+	}
+	domain, err := signing.Domain(fork, currentEpoch, params.BeaconConfig().DomainBeaconProposer, beaconState.GenesisValidatorsRoot())
+	if err != nil {
+		return err
+	}
+	proposer, err := beaconState.ValidatorAtIndex(header.Header.ProposerIndex)
+	if err != nil {
+		return err
+	}
+	proposerPubKey := proposer.PublicKey
+	return signing.VerifyBlockHeaderSigningRoot(header.Header, proposerPubKey, header.Signature, domain)
+}
+
 // VerifyBlockSignatureUsingCurrentFork verifies the proposer signature of a beacon block. This differs
 // from the above method by not using fork data from the state and instead retrieving it
 // via the respective epoch.

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/core/feed/operation/events.go

@@ -32,6 +32,9 @@ const (
 
 	// AttesterSlashingReceived is sent after an attester slashing is received from gossip or rpc
 	AttesterSlashingReceived = 8
+
+	// DataColumnSidecarReceived is sent after a data column sidecar is received from gossip or rpc.
+	DataColumnSidecarReceived = 9
 )
 
 // UnAggregatedAttReceivedData is the data sent with UnaggregatedAttReceived events.
@@ -77,3 +80,7 @@ type ProposerSlashingReceivedData struct {
 type AttesterSlashingReceivedData struct {
 	AttesterSlashing *ethpb.AttesterSlashing
 }
+
+type DataColumnSidecarReceivedData struct {
+	DataColumn *blocks.VerifiedRODataColumn
+}

beacon-chain/core/helpers/BUILD.bazel

@@ -50,6 +50,8 @@ go_test(
         "attestation_test.go",
         "beacon_committee_test.go",
         "block_test.go",
+        "private_access_fuzz_noop_test.go",  # keep
+        "private_access_test.go",
         "randao_test.go",
         "rewards_penalties_test.go",
         "shuffle_test.go",

beacon-chain/core/helpers/attestation.go

@@ -12,7 +12,6 @@ import (
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
 	prysmTime "github.com/prysmaticlabs/prysm/v5/time"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
-	log "github.com/sirupsen/logrus"
 )
 
 var (
@@ -133,9 +132,6 @@ func ComputeSubnetFromCommitteeAndSlot(activeValCount uint64, comIdx primitives.
 //
 // In the attestation must be within the range of 95 to 102 in the example above.
 func ValidateAttestationTime(attSlot primitives.Slot, genesisTime time.Time, clockDisparity time.Duration) error {
-	if err := slots.ValidateClock(attSlot, uint64(genesisTime.Unix())); err != nil {
-		return err
-	}
 	attTime, err := slots.ToTime(uint64(genesisTime.Unix()), attSlot)
 	if err != nil {
 		return err
@@ -182,24 +178,15 @@ func ValidateAttestationTime(attSlot primitives.Slot, genesisTime time.Time, clo
 	}
 
 	// EIP-7045: Starting in Deneb, allow any attestations from the current or previous epoch.
-
 	currentEpoch := slots.ToEpoch(currentSlot)
-	prevEpoch, err := currentEpoch.SafeSub(1)
-	if err != nil {
-		log.WithError(err).Debug("Ignoring underflow for a deneb attestation inclusion check in epoch 0")
-		prevEpoch = 0
-	}
-	attSlotEpoch := slots.ToEpoch(attSlot)
-	if attSlotEpoch != currentEpoch && attSlotEpoch != prevEpoch {
+	if attEpoch+1 < currentEpoch {
 		attError = fmt.Errorf(
-			"attestation epoch %d not within current epoch %d or previous epoch %d",
-			attSlot/params.BeaconConfig().SlotsPerEpoch,
+			"attestation epoch %d not within current epoch %d or previous epoch",
+			attEpoch,
 			currentEpoch,
-			prevEpoch,
 		)
 		return errors.Join(ErrTooLate, attError)
 	}
-
 	return nil
 }
 

beacon-chain/core/helpers/attestation_test.go

@@ -197,7 +197,7 @@ func Test_ValidateAttestationTime(t *testing.T) {
 					-500 * time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Second,
 				).Add(200 * time.Millisecond),
 			},
-			wantedErr: "attestation epoch 8 not within current epoch 15 or previous epoch 14",
+			wantedErr: "attestation epoch 8 not within current epoch 15 or previous epoch",
 		},
 		{
 			name: "attestation.slot is well beyond current slot",
@@ -205,7 +205,7 @@ func Test_ValidateAttestationTime(t *testing.T) {
 				attSlot:     1 << 32,
 				genesisTime: prysmTime.Now().Add(-15 * time.Duration(params.BeaconConfig().SecondsPerSlot) * time.Second),
 			},
-			wantedErr: "which exceeds max allowed value relative to the local clock",
+			wantedErr: "attestation slot 4294967296 not within attestation propagation range of 0 to 15 (current slot)",
 		},
 	}
 	for _, tt := range tests {

beacon-chain/core/helpers/beacon_committee.go

@@ -140,7 +140,7 @@ func BeaconCommittee(
 	}
 	count := committeesPerSlot * uint64(params.BeaconConfig().SlotsPerEpoch)
 
-	return computeCommittee(validatorIndices, seed, indexOffset, count)
+	return ComputeCommittee(validatorIndices, seed, indexOffset, count)
 }
 
 // CommitteeAssignmentContainer represents a committee list, committee index, and to be attested slot for a given epoch.
@@ -359,7 +359,7 @@ func UpdateProposerIndicesInCache(ctx context.Context, state state.ReadOnlyBeaco
 	if err != nil {
 		return err
 	}
-	proposerIndices, err := precomputeProposerIndices(state, indices, epoch)
+	proposerIndices, err := PrecomputeProposerIndices(state, indices, epoch)
 	if err != nil {
 		return err
 	}
@@ -409,7 +409,7 @@ func ClearCache() {
 	balanceCache.Clear()
 }
 
-// computeCommittee returns the requested shuffled committee out of the total committees using
+// ComputeCommittee returns the requested shuffled committee out of the total committees using
 // validator indices and seed.
 //
 // Spec pseudocode definition:
@@ -424,7 +424,7 @@ func ClearCache() {
 //	  start = (len(indices) * index) // count
 //	  end = (len(indices) * uint64(index + 1)) // count
 //	  return [indices[compute_shuffled_index(uint64(i), uint64(len(indices)), seed)] for i in range(start, end)]
-func computeCommittee(
+func ComputeCommittee(
 	indices []primitives.ValidatorIndex,
 	seed [32]byte,
 	index, count uint64,
@@ -451,9 +451,9 @@ func computeCommittee(
 	return shuffledList[start:end], nil
 }
 
-// This computes proposer indices of the current epoch and returns a list of proposer indices,
+// PrecomputeProposerIndices computes proposer indices of the current epoch and returns a list of proposer indices,
 // the index of the list represents the slot number.
-func precomputeProposerIndices(state state.ReadOnlyBeaconState, activeIndices []primitives.ValidatorIndex, e primitives.Epoch) ([]primitives.ValidatorIndex, error) {
+func PrecomputeProposerIndices(state state.ReadOnlyBeaconState, activeIndices []primitives.ValidatorIndex, e primitives.Epoch) ([]primitives.ValidatorIndex, error) {
 	hashFunc := hash.CustomSHA256Hasher()
 	proposerIndices := make([]primitives.ValidatorIndex, params.BeaconConfig().SlotsPerEpoch)
 

beacon-chain/core/helpers/beacon_committee_test.go

@@ -1,4 +1,4 @@
-package helpers
+package helpers_test
 
 import (
 	"context"
@@ -7,6 +7,7 @@ import (
 	"testing"
 
 	"github.com/prysmaticlabs/go-bitfield"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
@@ -21,7 +22,7 @@ import (
 )
 
 func TestComputeCommittee_WithoutCache(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	// Create 10 committees
 	committeeCount := uint64(10)
@@ -48,16 +49,16 @@ func TestComputeCommittee_WithoutCache(t *testing.T) {
 	require.NoError(t, err)
 
 	epoch := time.CurrentEpoch(state)
-	indices, err := ActiveValidatorIndices(context.Background(), state, epoch)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, epoch)
 	require.NoError(t, err)
-	seed, err := Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(t, err)
-	committees, err := computeCommittee(indices, seed, 0, 1 /* Total committee*/)
+	committees, err := helpers.ComputeCommittee(indices, seed, 0, 1 /* Total committee*/)
 	assert.NoError(t, err, "Could not compute committee")
 
 	// Test shuffled indices are correct for index 5 committee
 	index := uint64(5)
-	committee5, err := computeCommittee(indices, seed, index, committeeCount)
+	committee5, err := helpers.ComputeCommittee(indices, seed, index, committeeCount)
 	assert.NoError(t, err, "Could not compute committee")
 	start := slice.SplitOffset(validatorCount, committeeCount, index)
 	end := slice.SplitOffset(validatorCount, committeeCount, index+1)
@@ -65,7 +66,7 @@ func TestComputeCommittee_WithoutCache(t *testing.T) {
 
 	// Test shuffled indices are correct for index 9 committee
 	index = uint64(9)
-	committee9, err := computeCommittee(indices, seed, index, committeeCount)
+	committee9, err := helpers.ComputeCommittee(indices, seed, index, committeeCount)
 	assert.NoError(t, err, "Could not compute committee")
 	start = slice.SplitOffset(validatorCount, committeeCount, index)
 	end = slice.SplitOffset(validatorCount, committeeCount, index+1)
@@ -73,42 +74,42 @@ func TestComputeCommittee_WithoutCache(t *testing.T) {
 }
 
 func TestComputeCommittee_RegressionTest(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	indices := []primitives.ValidatorIndex{1, 3, 8, 16, 18, 19, 20, 23, 30, 35, 43, 46, 47, 54, 56, 58, 69, 70, 71, 83, 84, 85, 91, 96, 100, 103, 105, 106, 112, 121, 127, 128, 129, 140, 142, 144, 146, 147, 149, 152, 153, 154, 157, 160, 173, 175, 180, 182, 188, 189, 191, 194, 201, 204, 217, 221, 226, 228, 230, 231, 239, 241, 249, 250, 255}
 	seed := [32]byte{68, 110, 161, 250, 98, 230, 161, 172, 227, 226, 99, 11, 138, 124, 201, 134, 38, 197, 0, 120, 6, 165, 122, 34, 19, 216, 43, 226, 210, 114, 165, 183}
 	index := uint64(215)
 	count := uint64(32)
-	_, err := computeCommittee(indices, seed, index, count)
+	_, err := helpers.ComputeCommittee(indices, seed, index, count)
 	require.ErrorContains(t, "index out of range", err)
 }
 
 func TestVerifyBitfieldLength_OK(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	bf := bitfield.Bitlist{0xFF, 0x01}
 	committeeSize := uint64(8)
-	assert.NoError(t, VerifyBitfieldLength(bf, committeeSize), "Bitfield is not validated when it was supposed to be")
+	assert.NoError(t, helpers.VerifyBitfieldLength(bf, committeeSize), "Bitfield is not validated when it was supposed to be")
 
 	bf = bitfield.Bitlist{0xFF, 0x07}
 	committeeSize = 10
-	assert.NoError(t, VerifyBitfieldLength(bf, committeeSize), "Bitfield is not validated when it was supposed to be")
+	assert.NoError(t, helpers.VerifyBitfieldLength(bf, committeeSize), "Bitfield is not validated when it was supposed to be")
 }
 
 func TestCommitteeAssignments_CannotRetrieveFutureEpoch(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	epoch := primitives.Epoch(1)
 	state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 		Slot: 0, // Epoch 0.
 	})
 	require.NoError(t, err)
-	_, _, err = CommitteeAssignments(context.Background(), state, epoch+1)
+	_, _, err = helpers.CommitteeAssignments(context.Background(), state, epoch+1)
 	assert.ErrorContains(t, "can't be greater than next epoch", err)
 }
 
 func TestCommitteeAssignments_NoProposerForSlot0(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, 4*params.BeaconConfig().SlotsPerEpoch)
 	for i := 0; i < len(validators); i++ {
@@ -127,7 +128,7 @@ func TestCommitteeAssignments_NoProposerForSlot0(t *testing.T) {
 		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
 	})
 	require.NoError(t, err)
-	_, proposerIndexToSlots, err := CommitteeAssignments(context.Background(), state, 0)
+	_, proposerIndexToSlots, err := helpers.CommitteeAssignments(context.Background(), state, 0)
 	require.NoError(t, err, "Failed to determine CommitteeAssignments")
 	for _, ss := range proposerIndexToSlots {
 		for _, s := range ss {
@@ -198,9 +199,9 @@ func TestCommitteeAssignments_CanRetrieve(t *testing.T) {
 
 	for i, tt := range tests {
 		t.Run(fmt.Sprintf("%d", i), func(t *testing.T) {
-			ClearCache()
+			helpers.ClearCache()
 
-			validatorIndexToCommittee, proposerIndexToSlots, err := CommitteeAssignments(context.Background(), state, slots.ToEpoch(tt.slot))
+			validatorIndexToCommittee, proposerIndexToSlots, err := helpers.CommitteeAssignments(context.Background(), state, slots.ToEpoch(tt.slot))
 			require.NoError(t, err, "Failed to determine CommitteeAssignments")
 			cac := validatorIndexToCommittee[tt.index]
 			assert.Equal(t, tt.committeeIndex, cac.CommitteeIndex, "Unexpected committeeIndex for validator index %d", tt.index)
@@ -215,7 +216,7 @@ func TestCommitteeAssignments_CanRetrieve(t *testing.T) {
 }
 
 func TestCommitteeAssignments_CannotRetrieveFuture(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	// Initialize test with 256 validators, each slot and each index gets 4 validators.
 	validators := make([]*ethpb.Validator, 4*params.BeaconConfig().SlotsPerEpoch)
@@ -237,17 +238,17 @@ func TestCommitteeAssignments_CannotRetrieveFuture(t *testing.T) {
 		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
 	})
 	require.NoError(t, err)
-	_, proposerIndxs, err := CommitteeAssignments(context.Background(), state, time.CurrentEpoch(state))
+	_, proposerIndxs, err := helpers.CommitteeAssignments(context.Background(), state, time.CurrentEpoch(state))
 	require.NoError(t, err)
 	require.NotEqual(t, 0, len(proposerIndxs), "wanted non-zero proposer index set")
 
-	_, proposerIndxs, err = CommitteeAssignments(context.Background(), state, time.CurrentEpoch(state)+1)
+	_, proposerIndxs, err = helpers.CommitteeAssignments(context.Background(), state, time.CurrentEpoch(state)+1)
 	require.NoError(t, err)
 	require.NotEqual(t, 0, len(proposerIndxs), "wanted non-zero proposer index set")
 }
 
 func TestCommitteeAssignments_CannotRetrieveOlderThanSlotsPerHistoricalRoot(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	// Initialize test with 256 validators, each slot and each index gets 4 validators.
 	validators := make([]*ethpb.Validator, 4*params.BeaconConfig().SlotsPerEpoch)
@@ -263,12 +264,12 @@ func TestCommitteeAssignments_CannotRetrieveOlderThanSlotsPerHistoricalRoot(t *t
 		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
 	})
 	require.NoError(t, err)
-	_, _, err = CommitteeAssignments(context.Background(), state, 0)
+	_, _, err = helpers.CommitteeAssignments(context.Background(), state, 0)
 	require.ErrorContains(t, "start slot 0 is smaller than the minimum valid start slot 1", err)
 }
 
 func TestCommitteeAssignments_EverySlotHasMin1Proposer(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	// Initialize test with 256 validators, each slot and each index gets 4 validators.
 	validators := make([]*ethpb.Validator, 4*params.BeaconConfig().SlotsPerEpoch)
@@ -285,7 +286,7 @@ func TestCommitteeAssignments_EverySlotHasMin1Proposer(t *testing.T) {
 	})
 	require.NoError(t, err)
 	epoch := primitives.Epoch(1)
-	_, proposerIndexToSlots, err := CommitteeAssignments(context.Background(), state, epoch)
+	_, proposerIndexToSlots, err := helpers.CommitteeAssignments(context.Background(), state, epoch)
 	require.NoError(t, err, "Failed to determine CommitteeAssignments")
 
 	slotsWithProposers := make(map[primitives.Slot]bool)
@@ -391,10 +392,10 @@ func TestVerifyAttestationBitfieldLengths_OK(t *testing.T) {
 	}
 
 	for i, tt := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		require.NoError(t, state.SetSlot(tt.stateSlot))
-		err := VerifyAttestationBitfieldLengths(context.Background(), state, tt.attestation)
+		err := helpers.VerifyAttestationBitfieldLengths(context.Background(), state, tt.attestation)
 		if tt.verificationFailure {
 			assert.NotNil(t, err, "Verification succeeded when it was supposed to fail")
 		} else {
@@ -404,7 +405,7 @@ func TestVerifyAttestationBitfieldLengths_OK(t *testing.T) {
 }
 
 func TestUpdateCommitteeCache_CanUpdate(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validatorCount := params.BeaconConfig().MinGenesisActiveValidatorCount
 	validators := make([]*ethpb.Validator, validatorCount)
@@ -421,20 +422,20 @@ func TestUpdateCommitteeCache_CanUpdate(t *testing.T) {
 		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
 	})
 	require.NoError(t, err)
-	require.NoError(t, UpdateCommitteeCache(context.Background(), state, time.CurrentEpoch(state)))
+	require.NoError(t, helpers.UpdateCommitteeCache(context.Background(), state, time.CurrentEpoch(state)))
 
 	epoch := primitives.Epoch(0)
 	idx := primitives.CommitteeIndex(1)
-	seed, err := Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(t, err)
 
-	indices, err = committeeCache.Committee(context.Background(), params.BeaconConfig().SlotsPerEpoch.Mul(uint64(epoch)), seed, idx)
+	indices, err = helpers.CommitteeCache().Committee(context.Background(), params.BeaconConfig().SlotsPerEpoch.Mul(uint64(epoch)), seed, idx)
 	require.NoError(t, err)
 	assert.Equal(t, params.BeaconConfig().TargetCommitteeSize, uint64(len(indices)), "Did not save correct indices lengths")
 }
 
 func TestUpdateCommitteeCache_CanUpdateAcrossEpochs(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validatorCount := params.BeaconConfig().MinGenesisActiveValidatorCount
 	validators := make([]*ethpb.Validator, validatorCount)
@@ -452,19 +453,19 @@ func TestUpdateCommitteeCache_CanUpdateAcrossEpochs(t *testing.T) {
 	})
 	require.NoError(t, err)
 	e := time.CurrentEpoch(state)
-	require.NoError(t, UpdateCommitteeCache(context.Background(), state, e))
+	require.NoError(t, helpers.UpdateCommitteeCache(context.Background(), state, e))
 
-	seed, err := Seed(state, e, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, e, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(t, err)
-	require.Equal(t, true, committeeCache.HasEntry(string(seed[:])))
+	require.Equal(t, true, helpers.CommitteeCache().HasEntry(string(seed[:])))
 
-	nextSeed, err := Seed(state, e+1, params.BeaconConfig().DomainBeaconAttester)
+	nextSeed, err := helpers.Seed(state, e+1, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(t, err)
-	require.Equal(t, false, committeeCache.HasEntry(string(nextSeed[:])))
+	require.Equal(t, false, helpers.CommitteeCache().HasEntry(string(nextSeed[:])))
 
-	require.NoError(t, UpdateCommitteeCache(context.Background(), state, e+1))
+	require.NoError(t, helpers.UpdateCommitteeCache(context.Background(), state, e+1))
 
-	require.Equal(t, true, committeeCache.HasEntry(string(nextSeed[:])))
+	require.Equal(t, true, helpers.CommitteeCache().HasEntry(string(nextSeed[:])))
 }
 
 func BenchmarkComputeCommittee300000_WithPreCache(b *testing.B) {
@@ -481,20 +482,20 @@ func BenchmarkComputeCommittee300000_WithPreCache(b *testing.B) {
 	require.NoError(b, err)
 
 	epoch := time.CurrentEpoch(state)
-	indices, err := ActiveValidatorIndices(context.Background(), state, epoch)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, epoch)
 	require.NoError(b, err)
-	seed, err := Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(b, err)
 
 	index := uint64(3)
-	_, err = computeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
+	_, err = helpers.ComputeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
 	if err != nil {
 		panic(err)
 	}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		_, err := computeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
+		_, err := helpers.ComputeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
 		if err != nil {
 			panic(err)
 		}
@@ -515,20 +516,20 @@ func BenchmarkComputeCommittee3000000_WithPreCache(b *testing.B) {
 	require.NoError(b, err)
 
 	epoch := time.CurrentEpoch(state)
-	indices, err := ActiveValidatorIndices(context.Background(), state, epoch)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, epoch)
 	require.NoError(b, err)
-	seed, err := Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(b, err)
 
 	index := uint64(3)
-	_, err = computeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
+	_, err = helpers.ComputeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
 	if err != nil {
 		panic(err)
 	}
 
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
-		_, err := computeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
+		_, err := helpers.ComputeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
 		if err != nil {
 			panic(err)
 		}
@@ -549,9 +550,9 @@ func BenchmarkComputeCommittee128000_WithOutPreCache(b *testing.B) {
 	require.NoError(b, err)
 
 	epoch := time.CurrentEpoch(state)
-	indices, err := ActiveValidatorIndices(context.Background(), state, epoch)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, epoch)
 	require.NoError(b, err)
-	seed, err := Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(b, err)
 
 	i := uint64(0)
@@ -559,7 +560,7 @@ func BenchmarkComputeCommittee128000_WithOutPreCache(b *testing.B) {
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		i++
-		_, err := computeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
+		_, err := helpers.ComputeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
 		if err != nil {
 			panic(err)
 		}
@@ -584,9 +585,9 @@ func BenchmarkComputeCommittee1000000_WithOutCache(b *testing.B) {
 	require.NoError(b, err)
 
 	epoch := time.CurrentEpoch(state)
-	indices, err := ActiveValidatorIndices(context.Background(), state, epoch)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, epoch)
 	require.NoError(b, err)
-	seed, err := Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(b, err)
 
 	i := uint64(0)
@@ -594,7 +595,7 @@ func BenchmarkComputeCommittee1000000_WithOutCache(b *testing.B) {
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		i++
-		_, err := computeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
+		_, err := helpers.ComputeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
 		if err != nil {
 			panic(err)
 		}
@@ -619,9 +620,9 @@ func BenchmarkComputeCommittee4000000_WithOutCache(b *testing.B) {
 	require.NoError(b, err)
 
 	epoch := time.CurrentEpoch(state)
-	indices, err := ActiveValidatorIndices(context.Background(), state, epoch)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, epoch)
 	require.NoError(b, err)
-	seed, err := Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, epoch, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(b, err)
 
 	i := uint64(0)
@@ -629,7 +630,7 @@ func BenchmarkComputeCommittee4000000_WithOutCache(b *testing.B) {
 	b.ResetTimer()
 	for n := 0; n < b.N; n++ {
 		i++
-		_, err := computeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
+		_, err := helpers.ComputeCommittee(indices, seed, index, params.BeaconConfig().MaxCommitteesPerSlot)
 		if err != nil {
 			panic(err)
 		}
@@ -655,13 +656,13 @@ func TestBeaconCommitteeFromState_UpdateCacheForPreviousEpoch(t *testing.T) {
 		RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
 	})
 	require.NoError(t, err)
-	_, err = BeaconCommitteeFromState(context.Background(), state, 1 /* previous epoch */, 0)
+	_, err = helpers.BeaconCommitteeFromState(context.Background(), state, 1 /* previous epoch */, 0)
 	require.NoError(t, err)
 
 	// Verify previous epoch is cached
-	seed, err := Seed(state, 0, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(state, 0, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(t, err)
-	activeIndices, err := committeeCache.ActiveIndices(context.Background(), seed)
+	activeIndices, err := helpers.CommitteeCache().ActiveIndices(context.Background(), seed)
 	require.NoError(t, err)
 	assert.NotNil(t, activeIndices, "Did not cache active indices")
 }
@@ -680,19 +681,19 @@ func TestPrecomputeProposerIndices_Ok(t *testing.T) {
 	})
 	require.NoError(t, err)
 
-	indices, err := ActiveValidatorIndices(context.Background(), state, 0)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, 0)
 	require.NoError(t, err)
 
-	proposerIndices, err := precomputeProposerIndices(state, indices, time.CurrentEpoch(state))
+	proposerIndices, err := helpers.PrecomputeProposerIndices(state, indices, time.CurrentEpoch(state))
 	require.NoError(t, err)
 
 	var wantedProposerIndices []primitives.ValidatorIndex
-	seed, err := Seed(state, 0, params.BeaconConfig().DomainBeaconProposer)
+	seed, err := helpers.Seed(state, 0, params.BeaconConfig().DomainBeaconProposer)
 	require.NoError(t, err)
 	for i := uint64(0); i < uint64(params.BeaconConfig().SlotsPerEpoch); i++ {
 		seedWithSlot := append(seed[:], bytesutil.Bytes8(i)...)
 		seedWithSlotHash := hash.Hash(seedWithSlot)
-		index, err := ComputeProposerIndex(state, indices, seedWithSlotHash)
+		index, err := helpers.ComputeProposerIndex(state, indices, seedWithSlotHash)
 		require.NoError(t, err)
 		wantedProposerIndices = append(wantedProposerIndices, index)
 	}

beacon-chain/core/helpers/private_access_fuzz_noop_test.go

@@ -0,0 +1,17 @@
+//go:build fuzz
+
+package helpers
+
+import "github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
+
+func CommitteeCache() *cache.FakeCommitteeCache {
+	return committeeCache
+}
+
+func SyncCommitteeCache() *cache.FakeSyncCommitteeCache {
+	return syncCommitteeCache
+}
+
+func ProposerIndicesCache() *cache.FakeProposerIndicesCache {
+	return proposerIndicesCache
+}

beacon-chain/core/helpers/private_access_test.go

@@ -0,0 +1,17 @@
+//go:build !fuzz
+
+package helpers
+
+import "github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
+
+func CommitteeCache() *cache.CommitteeCache {
+	return committeeCache
+}
+
+func SyncCommitteeCache() *cache.SyncCommitteeCache {
+	return syncCommitteeCache
+}
+
+func ProposerIndicesCache() *cache.ProposerIndicesCache {
+	return proposerIndicesCache
+}

beacon-chain/core/helpers/randao_test.go

@@ -1,9 +1,10 @@
-package helpers
+package helpers_test
 
 import (
 	"encoding/binary"
 	"testing"
 
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
@@ -40,10 +41,10 @@ func TestRandaoMix_OK(t *testing.T) {
 		},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		require.NoError(t, state.SetSlot(params.BeaconConfig().SlotsPerEpoch.Mul(uint64(test.epoch+1))))
-		mix, err := RandaoMix(state, test.epoch)
+		mix, err := helpers.RandaoMix(state, test.epoch)
 		require.NoError(t, err)
 		assert.DeepEqual(t, test.randaoMix, mix, "Incorrect randao mix")
 	}
@@ -76,10 +77,10 @@ func TestRandaoMix_CopyOK(t *testing.T) {
 		},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		require.NoError(t, state.SetSlot(params.BeaconConfig().SlotsPerEpoch.Mul(uint64(test.epoch+1))))
-		mix, err := RandaoMix(state, test.epoch)
+		mix, err := helpers.RandaoMix(state, test.epoch)
 		require.NoError(t, err)
 		uniqueNumber := uint64(params.BeaconConfig().EpochsPerHistoricalVector.Add(1000))
 		binary.LittleEndian.PutUint64(mix, uniqueNumber)
@@ -92,7 +93,7 @@ func TestRandaoMix_CopyOK(t *testing.T) {
 }
 
 func TestGenerateSeed_OK(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	randaoMixes := make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector)
 	for i := 0; i < len(randaoMixes); i++ {
@@ -107,7 +108,7 @@ func TestGenerateSeed_OK(t *testing.T) {
 	})
 	require.NoError(t, err)
 
-	got, err := Seed(state, 10, params.BeaconConfig().DomainBeaconAttester)
+	got, err := helpers.Seed(state, 10, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(t, err)
 
 	wanted := [32]byte{102, 82, 23, 40, 226, 79, 171, 11, 203, 23, 175, 7, 88, 202, 80,

beacon-chain/core/helpers/rewards_penalties.go

@@ -22,7 +22,7 @@ var balanceCache = cache.NewEffectiveBalanceCache()
 //	 """
 //	 Return the combined effective balance of the ``indices``.
 //	 ``EFFECTIVE_BALANCE_INCREMENT`` Gwei minimum to avoid divisions by zero.
-//	 Math safe up to ~10B ETH, afterwhich this overflows uint64.
+//	 Math safe up to ~10B ETH, after which this overflows uint64.
 //	 """
 //	 return Gwei(max(EFFECTIVE_BALANCE_INCREMENT, sum([state.validators[index].effective_balance for index in indices])))
 func TotalBalance(state state.ReadOnlyValidators, indices []primitives.ValidatorIndex) uint64 {

beacon-chain/core/helpers/rewards_penalties_test.go

@@ -1,9 +1,10 @@
-package helpers
+package helpers_test
 
 import (
 	"math"
 	"testing"
 
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
@@ -14,7 +15,7 @@ import (
 )
 
 func TestTotalBalance_OK(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{Validators: []*ethpb.Validator{
 		{EffectiveBalance: 27 * 1e9}, {EffectiveBalance: 28 * 1e9},
@@ -22,19 +23,19 @@ func TestTotalBalance_OK(t *testing.T) {
 	}})
 	require.NoError(t, err)
 
-	balance := TotalBalance(state, []primitives.ValidatorIndex{0, 1, 2, 3})
+	balance := helpers.TotalBalance(state, []primitives.ValidatorIndex{0, 1, 2, 3})
 	wanted := state.Validators()[0].EffectiveBalance + state.Validators()[1].EffectiveBalance +
 		state.Validators()[2].EffectiveBalance + state.Validators()[3].EffectiveBalance
 	assert.Equal(t, wanted, balance, "Incorrect TotalBalance")
 }
 
 func TestTotalBalance_ReturnsEffectiveBalanceIncrement(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{Validators: []*ethpb.Validator{}})
 	require.NoError(t, err)
 
-	balance := TotalBalance(state, []primitives.ValidatorIndex{})
+	balance := helpers.TotalBalance(state, []primitives.ValidatorIndex{})
 	wanted := params.BeaconConfig().EffectiveBalanceIncrement
 	assert.Equal(t, wanted, balance, "Incorrect TotalBalance")
 }
@@ -51,7 +52,7 @@ func TestGetBalance_OK(t *testing.T) {
 		{i: 2, b: []uint64{0, 0, 0}},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{Balances: test.b})
 		require.NoError(t, err)
@@ -68,7 +69,7 @@ func TestTotalActiveBalance(t *testing.T) {
 		{10000},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		validators := make([]*ethpb.Validator, 0)
 		for i := 0; i < test.vCount; i++ {
@@ -76,7 +77,7 @@ func TestTotalActiveBalance(t *testing.T) {
 		}
 		state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{Validators: validators})
 		require.NoError(t, err)
-		bal, err := TotalActiveBalance(state)
+		bal, err := helpers.TotalActiveBalance(state)
 		require.NoError(t, err)
 		require.Equal(t, uint64(test.vCount)*params.BeaconConfig().MaxEffectiveBalance, bal)
 	}
@@ -91,7 +92,7 @@ func TestTotalActiveBal_ReturnMin(t *testing.T) {
 		{10000},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		validators := make([]*ethpb.Validator, 0)
 		for i := 0; i < test.vCount; i++ {
@@ -99,7 +100,7 @@ func TestTotalActiveBal_ReturnMin(t *testing.T) {
 		}
 		state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{Validators: validators})
 		require.NoError(t, err)
-		bal, err := TotalActiveBalance(state)
+		bal, err := helpers.TotalActiveBalance(state)
 		require.NoError(t, err)
 		require.Equal(t, params.BeaconConfig().EffectiveBalanceIncrement, bal)
 	}
@@ -115,7 +116,7 @@ func TestTotalActiveBalance_WithCache(t *testing.T) {
 		{vCount: 10000, wantCount: 10000},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		validators := make([]*ethpb.Validator, 0)
 		for i := 0; i < test.vCount; i++ {
@@ -123,7 +124,7 @@ func TestTotalActiveBalance_WithCache(t *testing.T) {
 		}
 		state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{Validators: validators})
 		require.NoError(t, err)
-		bal, err := TotalActiveBalance(state)
+		bal, err := helpers.TotalActiveBalance(state)
 		require.NoError(t, err)
 		require.Equal(t, uint64(test.wantCount)*params.BeaconConfig().MaxEffectiveBalance, bal)
 	}
@@ -141,7 +142,7 @@ func TestIncreaseBalance_OK(t *testing.T) {
 		{i: 2, b: []uint64{27 * 1e9, 28 * 1e9, 32 * 1e9}, nb: 33 * 1e9, eb: 65 * 1e9},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 			Validators: []*ethpb.Validator{
@@ -149,7 +150,7 @@ func TestIncreaseBalance_OK(t *testing.T) {
 			Balances: test.b,
 		})
 		require.NoError(t, err)
-		require.NoError(t, IncreaseBalance(state, test.i, test.nb))
+		require.NoError(t, helpers.IncreaseBalance(state, test.i, test.nb))
 		assert.Equal(t, test.eb, state.Balances()[test.i], "Incorrect Validator balance")
 	}
 }
@@ -167,7 +168,7 @@ func TestDecreaseBalance_OK(t *testing.T) {
 		{i: 3, b: []uint64{27 * 1e9, 28 * 1e9, 1, 28 * 1e9}, nb: 28 * 1e9, eb: 0},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 			Validators: []*ethpb.Validator{
@@ -175,13 +176,13 @@ func TestDecreaseBalance_OK(t *testing.T) {
 			Balances: test.b,
 		})
 		require.NoError(t, err)
-		require.NoError(t, DecreaseBalance(state, test.i, test.nb))
+		require.NoError(t, helpers.DecreaseBalance(state, test.i, test.nb))
 		assert.Equal(t, test.eb, state.Balances()[test.i], "Incorrect Validator balance")
 	}
 }
 
 func TestFinalityDelay(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	base := buildState(params.BeaconConfig().SlotsPerEpoch*10, 1)
 	base.FinalizedCheckpoint = &ethpb.Checkpoint{Epoch: 3}
@@ -195,25 +196,25 @@ func TestFinalityDelay(t *testing.T) {
 		finalizedEpoch = beaconState.FinalizedCheckpointEpoch()
 	}
 	setVal()
-	d := FinalityDelay(prevEpoch, finalizedEpoch)
+	d := helpers.FinalityDelay(prevEpoch, finalizedEpoch)
 	w := time.PrevEpoch(beaconState) - beaconState.FinalizedCheckpointEpoch()
 	assert.Equal(t, w, d, "Did not get wanted finality delay")
 
 	require.NoError(t, beaconState.SetFinalizedCheckpoint(&ethpb.Checkpoint{Epoch: 4}))
 	setVal()
-	d = FinalityDelay(prevEpoch, finalizedEpoch)
+	d = helpers.FinalityDelay(prevEpoch, finalizedEpoch)
 	w = time.PrevEpoch(beaconState) - beaconState.FinalizedCheckpointEpoch()
 	assert.Equal(t, w, d, "Did not get wanted finality delay")
 
 	require.NoError(t, beaconState.SetFinalizedCheckpoint(&ethpb.Checkpoint{Epoch: 5}))
 	setVal()
-	d = FinalityDelay(prevEpoch, finalizedEpoch)
+	d = helpers.FinalityDelay(prevEpoch, finalizedEpoch)
 	w = time.PrevEpoch(beaconState) - beaconState.FinalizedCheckpointEpoch()
 	assert.Equal(t, w, d, "Did not get wanted finality delay")
 }
 
 func TestIsInInactivityLeak(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	base := buildState(params.BeaconConfig().SlotsPerEpoch*10, 1)
 	base.FinalizedCheckpoint = &ethpb.Checkpoint{Epoch: 3}
@@ -227,13 +228,13 @@ func TestIsInInactivityLeak(t *testing.T) {
 		finalizedEpoch = beaconState.FinalizedCheckpointEpoch()
 	}
 	setVal()
-	assert.Equal(t, true, IsInInactivityLeak(prevEpoch, finalizedEpoch), "Wanted inactivity leak true")
+	assert.Equal(t, true, helpers.IsInInactivityLeak(prevEpoch, finalizedEpoch), "Wanted inactivity leak true")
 	require.NoError(t, beaconState.SetFinalizedCheckpoint(&ethpb.Checkpoint{Epoch: 4}))
 	setVal()
-	assert.Equal(t, true, IsInInactivityLeak(prevEpoch, finalizedEpoch), "Wanted inactivity leak true")
+	assert.Equal(t, true, helpers.IsInInactivityLeak(prevEpoch, finalizedEpoch), "Wanted inactivity leak true")
 	require.NoError(t, beaconState.SetFinalizedCheckpoint(&ethpb.Checkpoint{Epoch: 5}))
 	setVal()
-	assert.Equal(t, false, IsInInactivityLeak(prevEpoch, finalizedEpoch), "Wanted inactivity leak false")
+	assert.Equal(t, false, helpers.IsInInactivityLeak(prevEpoch, finalizedEpoch), "Wanted inactivity leak false")
 }
 
 func buildState(slot primitives.Slot, validatorCount uint64) *ethpb.BeaconState {
@@ -285,7 +286,7 @@ func TestIncreaseBadBalance_NotOK(t *testing.T) {
 		{i: 2, b: []uint64{math.MaxUint64, math.MaxUint64, math.MaxUint64}, nb: 33 * 1e9},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 			Validators: []*ethpb.Validator{
@@ -293,6 +294,6 @@ func TestIncreaseBadBalance_NotOK(t *testing.T) {
 			Balances: test.b,
 		})
 		require.NoError(t, err)
-		require.ErrorContains(t, "addition overflows", IncreaseBalance(state, test.i, test.nb))
+		require.ErrorContains(t, "addition overflows", helpers.IncreaseBalance(state, test.i, test.nb))
 	}
 }

beacon-chain/core/helpers/sync_committee.go

@@ -26,7 +26,7 @@ var (
 // 1. Checks if the public key exists in the sync committee cache
 // 2. If 1 fails, checks if the public key exists in the input current sync committee object
 func IsCurrentPeriodSyncCommittee(st state.BeaconState, valIdx primitives.ValidatorIndex) (bool, error) {
-	root, err := syncPeriodBoundaryRoot(st)
+	root, err := SyncPeriodBoundaryRoot(st)
 	if err != nil {
 		return false, err
 	}
@@ -63,7 +63,7 @@ func IsCurrentPeriodSyncCommittee(st state.BeaconState, valIdx primitives.Valida
 func IsNextPeriodSyncCommittee(
 	st state.BeaconState, valIdx primitives.ValidatorIndex,
 ) (bool, error) {
-	root, err := syncPeriodBoundaryRoot(st)
+	root, err := SyncPeriodBoundaryRoot(st)
 	if err != nil {
 		return false, err
 	}
@@ -90,7 +90,7 @@ func IsNextPeriodSyncCommittee(
 func CurrentPeriodSyncSubcommitteeIndices(
 	st state.BeaconState, valIdx primitives.ValidatorIndex,
 ) ([]primitives.CommitteeIndex, error) {
-	root, err := syncPeriodBoundaryRoot(st)
+	root, err := SyncPeriodBoundaryRoot(st)
 	if err != nil {
 		return nil, err
 	}
@@ -124,7 +124,7 @@ func CurrentPeriodSyncSubcommitteeIndices(
 func NextPeriodSyncSubcommitteeIndices(
 	st state.BeaconState, valIdx primitives.ValidatorIndex,
 ) ([]primitives.CommitteeIndex, error) {
-	root, err := syncPeriodBoundaryRoot(st)
+	root, err := SyncPeriodBoundaryRoot(st)
 	if err != nil {
 		return nil, err
 	}
@@ -182,10 +182,10 @@ func findSubCommitteeIndices(pubKey []byte, pubKeys [][]byte) []primitives.Commi
 	return indices
 }
 
-// Retrieve the current sync period boundary root by calculating sync period start epoch
+// SyncPeriodBoundaryRoot computes the current sync period boundary root by calculating sync period start epoch
 // and calling `BlockRoot`.
 // It uses the boundary slot - 1 for block root. (Ex: SlotsPerEpoch * EpochsPerSyncCommitteePeriod - 1)
-func syncPeriodBoundaryRoot(st state.ReadOnlyBeaconState) ([32]byte, error) {
+func SyncPeriodBoundaryRoot(st state.ReadOnlyBeaconState) ([32]byte, error) {
 	// Can't call `BlockRoot` until the first slot.
 	if st.Slot() == params.BeaconConfig().GenesisSlot {
 		return params.BeaconConfig().ZeroHash, nil

beacon-chain/core/helpers/sync_committee_test.go

@@ -1,4 +1,4 @@
-package helpers
+package helpers_test
 
 import (
 	"math/rand"
@@ -7,6 +7,7 @@ import (
 	"time"
 
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
@@ -17,7 +18,7 @@ import (
 )
 
 func TestIsCurrentEpochSyncCommittee_UsingCache(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -40,15 +41,15 @@ func TestIsCurrentEpochSyncCommittee_UsingCache(t *testing.T) {
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
 	r := [32]byte{'a'}
-	require.NoError(t, err, syncCommitteeCache.UpdatePositionsInCommittee(r, state))
+	require.NoError(t, err, helpers.SyncCommitteeCache().UpdatePositionsInCommittee(r, state))
 
-	ok, err := IsCurrentPeriodSyncCommittee(state, 0)
+	ok, err := helpers.IsCurrentPeriodSyncCommittee(state, 0)
 	require.NoError(t, err)
 	require.Equal(t, true, ok)
 }
 
 func TestIsCurrentEpochSyncCommittee_UsingCommittee(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -70,13 +71,13 @@ func TestIsCurrentEpochSyncCommittee_UsingCommittee(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	ok, err := IsCurrentPeriodSyncCommittee(state, 0)
+	ok, err := helpers.IsCurrentPeriodSyncCommittee(state, 0)
 	require.NoError(t, err)
 	require.Equal(t, true, ok)
 }
 
 func TestIsCurrentEpochSyncCommittee_DoesNotExist(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -98,13 +99,13 @@ func TestIsCurrentEpochSyncCommittee_DoesNotExist(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	ok, err := IsCurrentPeriodSyncCommittee(state, 12390192)
+	ok, err := helpers.IsCurrentPeriodSyncCommittee(state, 12390192)
 	require.ErrorContains(t, "validator index 12390192 does not exist", err)
 	require.Equal(t, false, ok)
 }
 
 func TestIsNextEpochSyncCommittee_UsingCache(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -127,15 +128,15 @@ func TestIsNextEpochSyncCommittee_UsingCache(t *testing.T) {
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
 	r := [32]byte{'a'}
-	require.NoError(t, err, syncCommitteeCache.UpdatePositionsInCommittee(r, state))
+	require.NoError(t, err, helpers.SyncCommitteeCache().UpdatePositionsInCommittee(r, state))
 
-	ok, err := IsNextPeriodSyncCommittee(state, 0)
+	ok, err := helpers.IsNextPeriodSyncCommittee(state, 0)
 	require.NoError(t, err)
 	require.Equal(t, true, ok)
 }
 
 func TestIsNextEpochSyncCommittee_UsingCommittee(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -157,13 +158,13 @@ func TestIsNextEpochSyncCommittee_UsingCommittee(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	ok, err := IsNextPeriodSyncCommittee(state, 0)
+	ok, err := helpers.IsNextPeriodSyncCommittee(state, 0)
 	require.NoError(t, err)
 	require.Equal(t, true, ok)
 }
 
 func TestIsNextEpochSyncCommittee_DoesNotExist(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -185,13 +186,13 @@ func TestIsNextEpochSyncCommittee_DoesNotExist(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	ok, err := IsNextPeriodSyncCommittee(state, 120391029)
+	ok, err := helpers.IsNextPeriodSyncCommittee(state, 120391029)
 	require.ErrorContains(t, "validator index 120391029 does not exist", err)
 	require.Equal(t, false, ok)
 }
 
 func TestCurrentEpochSyncSubcommitteeIndices_UsingCache(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -214,15 +215,15 @@ func TestCurrentEpochSyncSubcommitteeIndices_UsingCache(t *testing.T) {
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
 	r := [32]byte{'a'}
-	require.NoError(t, err, syncCommitteeCache.UpdatePositionsInCommittee(r, state))
+	require.NoError(t, err, helpers.SyncCommitteeCache().UpdatePositionsInCommittee(r, state))
 
-	index, err := CurrentPeriodSyncSubcommitteeIndices(state, 0)
+	index, err := helpers.CurrentPeriodSyncSubcommitteeIndices(state, 0)
 	require.NoError(t, err)
 	require.DeepEqual(t, []primitives.CommitteeIndex{0}, index)
 }
 
 func TestCurrentEpochSyncSubcommitteeIndices_UsingCommittee(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -243,27 +244,27 @@ func TestCurrentEpochSyncSubcommitteeIndices_UsingCommittee(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
-	root, err := syncPeriodBoundaryRoot(state)
+	root, err := helpers.SyncPeriodBoundaryRoot(state)
 	require.NoError(t, err)
 
 	// Test that cache was empty.
-	_, err = syncCommitteeCache.CurrentPeriodIndexPosition(root, 0)
+	_, err = helpers.SyncCommitteeCache().CurrentPeriodIndexPosition(root, 0)
 	require.Equal(t, cache.ErrNonExistingSyncCommitteeKey, err)
 
 	// Test that helper can retrieve the index given empty cache.
-	index, err := CurrentPeriodSyncSubcommitteeIndices(state, 0)
+	index, err := helpers.CurrentPeriodSyncSubcommitteeIndices(state, 0)
 	require.NoError(t, err)
 	require.DeepEqual(t, []primitives.CommitteeIndex{0}, index)
 
 	// Test that cache was able to fill on miss.
 	time.Sleep(100 * time.Millisecond)
-	index, err = syncCommitteeCache.CurrentPeriodIndexPosition(root, 0)
+	index, err = helpers.SyncCommitteeCache().CurrentPeriodIndexPosition(root, 0)
 	require.NoError(t, err)
 	require.DeepEqual(t, []primitives.CommitteeIndex{0}, index)
 }
 
 func TestCurrentEpochSyncSubcommitteeIndices_DoesNotExist(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -285,13 +286,13 @@ func TestCurrentEpochSyncSubcommitteeIndices_DoesNotExist(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	index, err := CurrentPeriodSyncSubcommitteeIndices(state, 129301923)
+	index, err := helpers.CurrentPeriodSyncSubcommitteeIndices(state, 129301923)
 	require.ErrorContains(t, "validator index 129301923 does not exist", err)
 	require.DeepEqual(t, []primitives.CommitteeIndex(nil), index)
 }
 
 func TestNextEpochSyncSubcommitteeIndices_UsingCache(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -314,15 +315,15 @@ func TestNextEpochSyncSubcommitteeIndices_UsingCache(t *testing.T) {
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
 	r := [32]byte{'a'}
-	require.NoError(t, err, syncCommitteeCache.UpdatePositionsInCommittee(r, state))
+	require.NoError(t, err, helpers.SyncCommitteeCache().UpdatePositionsInCommittee(r, state))
 
-	index, err := NextPeriodSyncSubcommitteeIndices(state, 0)
+	index, err := helpers.NextPeriodSyncSubcommitteeIndices(state, 0)
 	require.NoError(t, err)
 	require.DeepEqual(t, []primitives.CommitteeIndex{0}, index)
 }
 
 func TestNextEpochSyncSubcommitteeIndices_UsingCommittee(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -344,13 +345,13 @@ func TestNextEpochSyncSubcommitteeIndices_UsingCommittee(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	index, err := NextPeriodSyncSubcommitteeIndices(state, 0)
+	index, err := helpers.NextPeriodSyncSubcommitteeIndices(state, 0)
 	require.NoError(t, err)
 	require.DeepEqual(t, []primitives.CommitteeIndex{0}, index)
 }
 
 func TestNextEpochSyncSubcommitteeIndices_DoesNotExist(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -372,43 +373,43 @@ func TestNextEpochSyncSubcommitteeIndices_DoesNotExist(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	index, err := NextPeriodSyncSubcommitteeIndices(state, 21093019)
+	index, err := helpers.NextPeriodSyncSubcommitteeIndices(state, 21093019)
 	require.ErrorContains(t, "validator index 21093019 does not exist", err)
 	require.DeepEqual(t, []primitives.CommitteeIndex(nil), index)
 }
 
 func TestUpdateSyncCommitteeCache_BadSlot(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 		Slot: 1,
 	})
 	require.NoError(t, err)
-	err = UpdateSyncCommitteeCache(state)
+	err = helpers.UpdateSyncCommitteeCache(state)
 	require.ErrorContains(t, "not at the end of the epoch to update cache", err)
 
 	state, err = state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 		Slot: params.BeaconConfig().SlotsPerEpoch - 1,
 	})
 	require.NoError(t, err)
-	err = UpdateSyncCommitteeCache(state)
+	err = helpers.UpdateSyncCommitteeCache(state)
 	require.ErrorContains(t, "not at sync committee period boundary to update cache", err)
 }
 
 func TestUpdateSyncCommitteeCache_BadRoot(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	state, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{
 		Slot:              primitives.Slot(params.BeaconConfig().EpochsPerSyncCommitteePeriod)*params.BeaconConfig().SlotsPerEpoch - 1,
 		LatestBlockHeader: &ethpb.BeaconBlockHeader{StateRoot: params.BeaconConfig().ZeroHash[:]},
 	})
 	require.NoError(t, err)
-	err = UpdateSyncCommitteeCache(state)
+	err = helpers.UpdateSyncCommitteeCache(state)
 	require.ErrorContains(t, "zero hash state root can't be used to update cache", err)
 }
 
 func TestIsCurrentEpochSyncCommittee_SameBlockRoot(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().SyncCommitteeSize)
 	syncCommittee := &ethpb.SyncCommittee{
@@ -435,7 +436,7 @@ func TestIsCurrentEpochSyncCommittee_SameBlockRoot(t *testing.T) {
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
 	require.NoError(t, state.SetNextSyncCommittee(syncCommittee))
 
-	comIdxs, err := CurrentPeriodSyncSubcommitteeIndices(state, 200)
+	comIdxs, err := helpers.CurrentPeriodSyncSubcommitteeIndices(state, 200)
 	require.NoError(t, err)
 
 	wantedSlot := params.BeaconConfig().EpochsPerSyncCommitteePeriod.Mul(uint64(params.BeaconConfig().SlotsPerEpoch))
@@ -446,7 +447,7 @@ func TestIsCurrentEpochSyncCommittee_SameBlockRoot(t *testing.T) {
 		syncCommittee.Pubkeys[i], syncCommittee.Pubkeys[j] = syncCommittee.Pubkeys[j], syncCommittee.Pubkeys[i]
 	})
 	require.NoError(t, state.SetCurrentSyncCommittee(syncCommittee))
-	newIdxs, err := CurrentPeriodSyncSubcommitteeIndices(state, 200)
+	newIdxs, err := helpers.CurrentPeriodSyncSubcommitteeIndices(state, 200)
 	require.NoError(t, err)
 	require.DeepNotEqual(t, comIdxs, newIdxs)
 }

beacon-chain/core/helpers/validators_test.go

@@ -1,4 +1,4 @@
-package helpers
+package helpers_test
 
 import (
 	"context"
@@ -6,6 +6,7 @@ import (
 	"testing"
 
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/helpers"
 	"github.com/prysmaticlabs/prysm/v5/beacon-chain/core/time"
 	forkchoicetypes "github.com/prysmaticlabs/prysm/v5/beacon-chain/forkchoice/types"
 	state_native "github.com/prysmaticlabs/prysm/v5/beacon-chain/state/state-native"
@@ -32,7 +33,7 @@ func TestIsActiveValidator_OK(t *testing.T) {
 	}
 	for _, test := range tests {
 		validator := &ethpb.Validator{ActivationEpoch: 10, ExitEpoch: 100}
-		assert.Equal(t, test.b, IsActiveValidator(validator, test.a), "IsActiveValidator(%d)", test.a)
+		assert.Equal(t, test.b, helpers.IsActiveValidator(validator, test.a), "IsActiveValidator(%d)", test.a)
 	}
 }
 
@@ -53,7 +54,7 @@ func TestIsActiveValidatorUsingTrie_OK(t *testing.T) {
 	for _, test := range tests {
 		readOnlyVal, err := beaconState.ValidatorAtIndexReadOnly(0)
 		require.NoError(t, err)
-		assert.Equal(t, test.b, IsActiveValidatorUsingTrie(readOnlyVal, test.a), "IsActiveValidatorUsingTrie(%d)", test.a)
+		assert.Equal(t, test.b, helpers.IsActiveValidatorUsingTrie(readOnlyVal, test.a), "IsActiveValidatorUsingTrie(%d)", test.a)
 	}
 }
 
@@ -81,7 +82,7 @@ func TestIsActiveNonSlashedValidatorUsingTrie_OK(t *testing.T) {
 		require.NoError(t, err)
 		readOnlyVal, err := beaconState.ValidatorAtIndexReadOnly(0)
 		require.NoError(t, err)
-		assert.Equal(t, test.b, IsActiveNonSlashedValidatorUsingTrie(readOnlyVal, test.a), "IsActiveNonSlashedValidatorUsingTrie(%d)", test.a)
+		assert.Equal(t, test.b, helpers.IsActiveNonSlashedValidatorUsingTrie(readOnlyVal, test.a), "IsActiveNonSlashedValidatorUsingTrie(%d)", test.a)
 	}
 }
 
@@ -161,7 +162,7 @@ func TestIsSlashableValidator_OK(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			t.Run("without trie", func(t *testing.T) {
-				slashableValidator := IsSlashableValidator(test.validator.ActivationEpoch,
+				slashableValidator := helpers.IsSlashableValidator(test.validator.ActivationEpoch,
 					test.validator.WithdrawableEpoch, test.validator.Slashed, test.epoch)
 				assert.Equal(t, test.slashable, slashableValidator, "Expected active validator slashable to be %t", test.slashable)
 			})
@@ -170,7 +171,7 @@ func TestIsSlashableValidator_OK(t *testing.T) {
 				require.NoError(t, err)
 				readOnlyVal, err := beaconState.ValidatorAtIndexReadOnly(0)
 				require.NoError(t, err)
-				slashableValidator := IsSlashableValidatorUsingTrie(readOnlyVal, test.epoch)
+				slashableValidator := helpers.IsSlashableValidatorUsingTrie(readOnlyVal, test.epoch)
 				assert.Equal(t, test.slashable, slashableValidator, "Expected active validator slashable to be %t", test.slashable)
 			})
 		})
@@ -223,17 +224,17 @@ func TestBeaconProposerIndex_OK(t *testing.T) {
 	}
 
 	for _, tt := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		require.NoError(t, state.SetSlot(tt.slot))
-		result, err := BeaconProposerIndex(context.Background(), state)
+		result, err := helpers.BeaconProposerIndex(context.Background(), state)
 		require.NoError(t, err, "Failed to get shard and committees at slot")
 		assert.Equal(t, tt.index, result, "Result index was an unexpected value")
 	}
 }
 
 func TestBeaconProposerIndex_BadState(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	params.SetupTestConfigCleanup(t)
 	c := params.BeaconConfig()
@@ -261,12 +262,12 @@ func TestBeaconProposerIndex_BadState(t *testing.T) {
 	// Set a very high slot, so that retrieved block root will be
 	// non existent for the proposer cache.
 	require.NoError(t, state.SetSlot(100))
-	_, err = BeaconProposerIndex(context.Background(), state)
+	_, err = helpers.BeaconProposerIndex(context.Background(), state)
 	require.NoError(t, err)
 }
 
 func TestComputeProposerIndex_Compatibility(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	validators := make([]*ethpb.Validator, params.BeaconConfig().MinGenesisActiveValidatorCount)
 	for i := 0; i < len(validators); i++ {
@@ -281,22 +282,22 @@ func TestComputeProposerIndex_Compatibility(t *testing.T) {
 	})
 	require.NoError(t, err)
 
-	indices, err := ActiveValidatorIndices(context.Background(), state, 0)
+	indices, err := helpers.ActiveValidatorIndices(context.Background(), state, 0)
 	require.NoError(t, err)
 
 	var proposerIndices []primitives.ValidatorIndex
-	seed, err := Seed(state, 0, params.BeaconConfig().DomainBeaconProposer)
+	seed, err := helpers.Seed(state, 0, params.BeaconConfig().DomainBeaconProposer)
 	require.NoError(t, err)
 	for i := uint64(0); i < uint64(params.BeaconConfig().SlotsPerEpoch); i++ {
 		seedWithSlot := append(seed[:], bytesutil.Bytes8(i)...)
 		seedWithSlotHash := hash.Hash(seedWithSlot)
-		index, err := ComputeProposerIndex(state, indices, seedWithSlotHash)
+		index, err := helpers.ComputeProposerIndex(state, indices, seedWithSlotHash)
 		require.NoError(t, err)
 		proposerIndices = append(proposerIndices, index)
 	}
 
 	var wantedProposerIndices []primitives.ValidatorIndex
-	seed, err = Seed(state, 0, params.BeaconConfig().DomainBeaconProposer)
+	seed, err = helpers.Seed(state, 0, params.BeaconConfig().DomainBeaconProposer)
 	require.NoError(t, err)
 	for i := uint64(0); i < uint64(params.BeaconConfig().SlotsPerEpoch); i++ {
 		seedWithSlot := append(seed[:], bytesutil.Bytes8(i)...)
@@ -309,15 +310,15 @@ func TestComputeProposerIndex_Compatibility(t *testing.T) {
 }
 
 func TestDelayedActivationExitEpoch_OK(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	epoch := primitives.Epoch(9999)
 	wanted := epoch + 1 + params.BeaconConfig().MaxSeedLookahead
-	assert.Equal(t, wanted, ActivationExitEpoch(epoch))
+	assert.Equal(t, wanted, helpers.ActivationExitEpoch(epoch))
 }
 
 func TestActiveValidatorCount_Genesis(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	c := 1000
 	validators := make([]*ethpb.Validator, c)
@@ -334,10 +335,10 @@ func TestActiveValidatorCount_Genesis(t *testing.T) {
 	require.NoError(t, err)
 
 	// Preset cache to a bad count.
-	seed, err := Seed(beaconState, 0, params.BeaconConfig().DomainBeaconAttester)
+	seed, err := helpers.Seed(beaconState, 0, params.BeaconConfig().DomainBeaconAttester)
 	require.NoError(t, err)
-	require.NoError(t, committeeCache.AddCommitteeShuffledList(context.Background(), &cache.Committees{Seed: seed, ShuffledIndices: []primitives.ValidatorIndex{1, 2, 3}}))
-	validatorCount, err := ActiveValidatorCount(context.Background(), beaconState, time.CurrentEpoch(beaconState))
+	require.NoError(t, helpers.CommitteeCache().AddCommitteeShuffledList(context.Background(), &cache.Committees{Seed: seed, ShuffledIndices: []primitives.ValidatorIndex{1, 2, 3}}))
+	validatorCount, err := helpers.ActiveValidatorCount(context.Background(), beaconState, time.CurrentEpoch(beaconState))
 	require.NoError(t, err)
 	assert.Equal(t, uint64(c), validatorCount, "Did not get the correct validator count")
 }
@@ -353,7 +354,7 @@ func TestChurnLimit_OK(t *testing.T) {
 		{validatorCount: 2000000, wantedChurn: 30 /* validatorCount/churnLimitQuotient */},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		validators := make([]*ethpb.Validator, test.validatorCount)
 		for i := 0; i < len(validators); i++ {
@@ -368,9 +369,9 @@ func TestChurnLimit_OK(t *testing.T) {
 			RandaoMixes: make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
 		})
 		require.NoError(t, err)
-		validatorCount, err := ActiveValidatorCount(context.Background(), beaconState, time.CurrentEpoch(beaconState))
+		validatorCount, err := helpers.ActiveValidatorCount(context.Background(), beaconState, time.CurrentEpoch(beaconState))
 		require.NoError(t, err)
-		resultChurn := ValidatorActivationChurnLimit(validatorCount)
+		resultChurn := helpers.ValidatorActivationChurnLimit(validatorCount)
 		assert.Equal(t, test.wantedChurn, resultChurn, "ValidatorActivationChurnLimit(%d)", test.validatorCount)
 	}
 }
@@ -386,7 +387,7 @@ func TestChurnLimitDeneb_OK(t *testing.T) {
 		{2000000, params.BeaconConfig().MaxPerEpochActivationChurnLimit},
 	}
 	for _, test := range tests {
-		ClearCache()
+		helpers.ClearCache()
 
 		// Create validators
 		validators := make([]*ethpb.Validator, test.validatorCount)
@@ -405,11 +406,11 @@ func TestChurnLimitDeneb_OK(t *testing.T) {
 		require.NoError(t, err)
 
 		// Get active validator count
-		validatorCount, err := ActiveValidatorCount(context.Background(), beaconState, time.CurrentEpoch(beaconState))
+		validatorCount, err := helpers.ActiveValidatorCount(context.Background(), beaconState, time.CurrentEpoch(beaconState))
 		require.NoError(t, err)
 
 		// Test churn limit calculation
-		resultChurn := ValidatorActivationChurnLimitDeneb(validatorCount)
+		resultChurn := helpers.ValidatorActivationChurnLimitDeneb(validatorCount)
 		assert.Equal(t, test.wantedChurn, resultChurn)
 	}
 }
@@ -574,11 +575,11 @@ func TestActiveValidatorIndices(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			ClearCache()
+			helpers.ClearCache()
 
 			s, err := state_native.InitializeFromProtoPhase0(tt.args.state)
 			require.NoError(t, err)
-			got, err := ActiveValidatorIndices(context.Background(), s, tt.args.epoch)
+			got, err := helpers.ActiveValidatorIndices(context.Background(), s, tt.args.epoch)
 			if tt.wantedErr != "" {
 				assert.ErrorContains(t, tt.wantedErr, err)
 				return
@@ -684,12 +685,12 @@ func TestComputeProposerIndex(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			ClearCache()
+			helpers.ClearCache()
 
 			bState := &ethpb.BeaconState{Validators: tt.args.validators}
 			stTrie, err := state_native.InitializeFromProtoUnsafePhase0(bState)
 			require.NoError(t, err)
-			got, err := ComputeProposerIndex(stTrie, tt.args.indices, tt.args.seed)
+			got, err := helpers.ComputeProposerIndex(stTrie, tt.args.indices, tt.args.seed)
 			if tt.wantedErr != "" {
 				assert.ErrorContains(t, tt.wantedErr, err)
 				return
@@ -718,9 +719,9 @@ func TestIsEligibleForActivationQueue(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			ClearCache()
+			helpers.ClearCache()
 
-			assert.Equal(t, tt.want, IsEligibleForActivationQueue(tt.validator), "IsEligibleForActivationQueue()")
+			assert.Equal(t, tt.want, helpers.IsEligibleForActivationQueue(tt.validator), "IsEligibleForActivationQueue()")
 		})
 	}
 }
@@ -747,11 +748,11 @@ func TestIsIsEligibleForActivation(t *testing.T) {
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			ClearCache()
+			helpers.ClearCache()
 
 			s, err := state_native.InitializeFromProtoPhase0(tt.state)
 			require.NoError(t, err)
-			assert.Equal(t, tt.want, IsEligibleForActivation(s, tt.validator), "IsEligibleForActivation()")
+			assert.Equal(t, tt.want, helpers.IsEligibleForActivation(s, tt.validator), "IsEligibleForActivation()")
 		})
 	}
 }
@@ -765,7 +766,7 @@ func computeProposerIndexWithValidators(validators []*ethpb.Validator, activeInd
 	hashFunc := hash.CustomSHA256Hasher()
 
 	for i := uint64(0); ; i++ {
-		candidateIndex, err := ComputeShuffledIndex(primitives.ValidatorIndex(i%length), length, seed, true /* shuffle */)
+		candidateIndex, err := helpers.ComputeShuffledIndex(primitives.ValidatorIndex(i%length), length, seed, true /* shuffle */)
 		if err != nil {
 			return 0, err
 		}
@@ -787,7 +788,7 @@ func computeProposerIndexWithValidators(validators []*ethpb.Validator, activeInd
 }
 
 func TestLastActivatedValidatorIndex_OK(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	beaconState, err := state_native.InitializeFromProtoPhase0(&ethpb.BeaconState{})
 	require.NoError(t, err)
@@ -806,13 +807,13 @@ func TestLastActivatedValidatorIndex_OK(t *testing.T) {
 	require.NoError(t, beaconState.SetValidators(validators))
 	require.NoError(t, beaconState.SetBalances(balances))
 
-	index, err := LastActivatedValidatorIndex(context.Background(), beaconState)
+	index, err := helpers.LastActivatedValidatorIndex(context.Background(), beaconState)
 	require.NoError(t, err)
 	require.Equal(t, index, primitives.ValidatorIndex(3))
 }
 
 func TestProposerIndexFromCheckpoint(t *testing.T) {
-	ClearCache()
+	helpers.ClearCache()
 
 	e := primitives.Epoch(2)
 	r := [32]byte{'a'}
@@ -820,10 +821,10 @@ func TestProposerIndexFromCheckpoint(t *testing.T) {
 	ids := [32]primitives.ValidatorIndex{}
 	slot := primitives.Slot(69) // slot 5 in the Epoch
 	ids[5] = primitives.ValidatorIndex(19)
-	proposerIndicesCache.Set(e, r, ids)
+	helpers.ProposerIndicesCache().Set(e, r, ids)
 	c := &forkchoicetypes.Checkpoint{Root: root, Epoch: e - 1}
-	proposerIndicesCache.SetCheckpoint(*c, r)
-	id, err := ProposerIndexAtSlotFromCheckpoint(c, slot)
+	helpers.ProposerIndicesCache().SetCheckpoint(*c, r)
+	id, err := helpers.ProposerIndexAtSlotFromCheckpoint(c, slot)
 	require.NoError(t, err)
 	require.Equal(t, ids[5], id)
 }

beacon-chain/core/peerdas/BUILD.bazel

@@ -0,0 +1,21 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["helpers.go"],
+    importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/core/peerdas",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//config/fieldparams:go_default_library",
+        "//config/params:go_default_library",
+        "//consensus-types/blocks:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
+        "//crypto/hash:go_default_library",
+        "//encoding/bytesutil:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
+        "@com_github_ethereum_c_kzg_4844//bindings/go:go_default_library",
+        "@com_github_ethereum_go_ethereum//p2p/enode:go_default_library",
+        "@com_github_holiman_uint256//:go_default_library",
+        "@com_github_pkg_errors//:go_default_library",
+    ],
+)

beacon-chain/core/peerdas/helpers.go

@@ -0,0 +1,240 @@
+package peerdas
+
+import (
+	"encoding/binary"
+
+	cKzg4844 "github.com/ethereum/c-kzg-4844/bindings/go"
+	"github.com/holiman/uint256"
+
+	"github.com/ethereum/go-ethereum/p2p/enode"
+	errors "github.com/pkg/errors"
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v5/crypto/hash"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+)
+
+const (
+	// Bytes per cell
+	bytesPerCell = cKzg4844.FieldElementsPerCell * cKzg4844.BytesPerFieldElement
+
+	// Number of cells in the extended matrix
+	extendedMatrixSize = fieldparams.MaxBlobsPerBlock * cKzg4844.CellsPerExtBlob
+)
+
+type (
+	extendedMatrix []cKzg4844.Cell
+
+	cellCoordinate struct {
+		blobIndex uint64
+		cellID    uint64
+	}
+)
+
+var (
+	errCustodySubnetCountTooLarge = errors.New("custody subnet count larger than data column sidecar subnet count")
+	errCellNotFound               = errors.New("cell not found (should never happen)")
+)
+
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#helper-functions
+func CustodyColumns(nodeId enode.ID, custodySubnetCount uint64) (map[uint64]bool, error) {
+	dataColumnSidecarSubnetCount := params.BeaconConfig().DataColumnSidecarSubnetCount
+
+	// Compute the custodied subnets.
+	subnetIds, err := CustodyColumnSubnets(nodeId, custodySubnetCount)
+	if err != nil {
+		return nil, errors.Wrap(err, "custody subnets")
+	}
+
+	columnsPerSubnet := cKzg4844.CellsPerExtBlob / dataColumnSidecarSubnetCount
+
+	// Knowing the subnet ID and the number of columns per subnet, select all the columns the node should custody.
+	// Columns belonging to the same subnet are contiguous.
+	columnIndices := make(map[uint64]bool, custodySubnetCount*columnsPerSubnet)
+	for i := uint64(0); i < columnsPerSubnet; i++ {
+		for subnetId := range subnetIds {
+			columnIndex := dataColumnSidecarSubnetCount*i + subnetId
+			columnIndices[columnIndex] = true
+		}
+	}
+
+	return columnIndices, nil
+}
+
+func CustodyColumnSubnets(nodeId enode.ID, custodySubnetCount uint64) (map[uint64]bool, error) {
+	dataColumnSidecarSubnetCount := params.BeaconConfig().DataColumnSidecarSubnetCount
+
+	// Check if the custody subnet count is larger than the data column sidecar subnet count.
+	if custodySubnetCount > dataColumnSidecarSubnetCount {
+		return nil, errCustodySubnetCountTooLarge
+	}
+
+	// First, compute the subnet IDs that the node should participate in.
+	subnetIds := make(map[uint64]bool, custodySubnetCount)
+
+	for i := uint64(0); uint64(len(subnetIds)) < custodySubnetCount; i++ {
+		nodeIdUInt256, nextNodeIdUInt256 := new(uint256.Int), new(uint256.Int)
+		nodeIdUInt256.SetBytes(nodeId.Bytes())
+		nextNodeIdUInt256.Add(nodeIdUInt256, uint256.NewInt(i))
+		nextNodeIdUInt64 := nextNodeIdUInt256.Uint64()
+		nextNodeId := bytesutil.Uint64ToBytesLittleEndian(nextNodeIdUInt64)
+
+		hashedNextNodeId := hash.Hash(nextNodeId)
+		subnetId := binary.LittleEndian.Uint64(hashedNextNodeId[:8]) % dataColumnSidecarSubnetCount
+
+		if _, exists := subnetIds[subnetId]; !exists {
+			subnetIds[subnetId] = true
+		}
+	}
+
+	return subnetIds, nil
+}
+
+// ComputeExtendedMatrix computes the extended matrix from the blobs.
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#compute_extended_matrix
+func ComputeExtendedMatrix(blobs []cKzg4844.Blob) (extendedMatrix, error) {
+	matrix := make(extendedMatrix, 0, extendedMatrixSize)
+
+	for i := range blobs {
+		// Chunk a non-extended blob into cells representing the corresponding extended blob.
+		blob := &blobs[i]
+		cells, err := cKzg4844.ComputeCells(blob)
+		if err != nil {
+			return nil, errors.Wrap(err, "compute cells for blob")
+		}
+
+		matrix = append(matrix, cells[:]...)
+	}
+
+	return matrix, nil
+}
+
+// RecoverMatrix recovers the extended matrix from some cells.
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#recover_matrix
+func RecoverMatrix(cellFromCoordinate map[cellCoordinate]cKzg4844.Cell, blobCount uint64) (extendedMatrix, error) {
+	matrix := make(extendedMatrix, 0, extendedMatrixSize)
+
+	for blobIndex := uint64(0); blobIndex < blobCount; blobIndex++ {
+		// Filter all cells that belong to the current blob.
+		cellIds := make([]uint64, 0, cKzg4844.CellsPerExtBlob)
+		for coordinate := range cellFromCoordinate {
+			if coordinate.blobIndex == blobIndex {
+				cellIds = append(cellIds, coordinate.cellID)
+			}
+		}
+
+		// Retrieve cells corresponding to all `cellIds`.
+		cellIdsCount := len(cellIds)
+
+		cells := make([]cKzg4844.Cell, 0, cellIdsCount)
+		for _, cellId := range cellIds {
+			coordinate := cellCoordinate{blobIndex: blobIndex, cellID: cellId}
+			cell, ok := cellFromCoordinate[coordinate]
+			if !ok {
+				return matrix, errCellNotFound
+			}
+
+			cells = append(cells, cell)
+		}
+
+		// Recover all cells.
+		allCellsForRow, err := cKzg4844.RecoverAllCells(cellIds, cells)
+		if err != nil {
+			return matrix, errors.Wrap(err, "recover all cells")
+		}
+
+		matrix = append(matrix, allCellsForRow[:]...)
+	}
+
+	return matrix, nil
+}
+
+// https://github.com/ethereum/consensus-specs/blob/dev/specs/_features/eip7594/das-core.md#recover_matrix
+func DataColumnSidecars(signedBlock interfaces.SignedBeaconBlock, blobs []cKzg4844.Blob) ([]*ethpb.DataColumnSidecar, error) {
+	blobsCount := len(blobs)
+
+	// Get the signed block header.
+	signedBlockHeader, err := signedBlock.Header()
+	if err != nil {
+		return nil, errors.Wrap(err, "signed block header")
+	}
+
+	// Get the block body.
+	block := signedBlock.Block()
+	blockBody := block.Body()
+
+	// Get the blob KZG commitments.
+	blobKzgCommitments, err := blockBody.BlobKzgCommitments()
+	if err != nil {
+		return nil, errors.Wrap(err, "blob KZG commitments")
+	}
+
+	// Compute the KZG commitments inclusion proof.
+	kzgCommitmentsInclusionProof, err := blocks.MerkleProofKZGCommitments(blockBody)
+	if err != nil {
+		return nil, errors.Wrap(err, "merkle proof ZKG commitments")
+	}
+
+	// Compute cells and proofs.
+	cells := make([][cKzg4844.CellsPerExtBlob]cKzg4844.Cell, 0, blobsCount)
+	proofs := make([][cKzg4844.CellsPerExtBlob]cKzg4844.KZGProof, 0, blobsCount)
+
+	for i := range blobs {
+		blob := &blobs[i]
+		blobCells, blobProofs, err := cKzg4844.ComputeCellsAndProofs(blob)
+		if err != nil {
+			return nil, errors.Wrap(err, "compute cells and proofs")
+		}
+
+		cells = append(cells, blobCells)
+		proofs = append(proofs, blobProofs)
+	}
+
+	// Get the column sidecars.
+	sidecars := make([]*ethpb.DataColumnSidecar, cKzg4844.CellsPerExtBlob)
+	for columnIndex := uint64(0); columnIndex < cKzg4844.CellsPerExtBlob; columnIndex++ {
+		column := make([]cKzg4844.Cell, 0, blobsCount)
+		kzgProofOfColumn := make([]cKzg4844.KZGProof, 0, blobsCount)
+
+		for rowIndex := 0; rowIndex < blobsCount; rowIndex++ {
+			cell := cells[rowIndex][columnIndex]
+			column = append(column, cell)
+
+			kzgProof := proofs[rowIndex][columnIndex]
+			kzgProofOfColumn = append(kzgProofOfColumn, kzgProof)
+		}
+
+		columnBytes := make([][]byte, 0, blobsCount)
+		for i := range column {
+			cell := column[i]
+
+			cellBytes := make([]byte, 0, bytesPerCell)
+			for _, fieldElement := range cell {
+				cellBytes = append(cellBytes, fieldElement[:]...)
+			}
+
+			columnBytes = append(columnBytes, cellBytes)
+		}
+
+		kzgProofOfColumnBytes := make([][]byte, 0, blobsCount)
+		for _, kzgProof := range kzgProofOfColumn {
+			kzgProofOfColumnBytes = append(kzgProofOfColumnBytes, kzgProof[:])
+		}
+
+		sidecar := &ethpb.DataColumnSidecar{
+			ColumnIndex:                  columnIndex,
+			DataColumn:                   columnBytes,
+			KzgCommitments:               blobKzgCommitments,
+			KzgProof:                     kzgProofOfColumnBytes,
+			SignedBlockHeader:            signedBlockHeader,
+			KzgCommitmentsInclusionProof: kzgCommitmentsInclusionProof,
+		}
+
+		sidecars = append(sidecars, sidecar)
+	}
+
+	return sidecars, nil
+}

beacon-chain/core/signing/signing_root.go

@@ -59,7 +59,7 @@ func ComputeDomainAndSign(st state.ReadOnlyBeaconState, epoch primitives.Epoch,
 	return ComputeDomainAndSignWithoutState(st.Fork(), epoch, domain, st.GenesisValidatorsRoot(), obj, key)
 }
 
-// ComputeDomainAndSignWithoutState offers the same functionalit as ComputeDomainAndSign without the need to provide a BeaconState.
+// ComputeDomainAndSignWithoutState offers the same functionality as ComputeDomainAndSign without the need to provide a BeaconState.
 // This is particularly helpful for signing values in tests.
 func ComputeDomainAndSignWithoutState(fork *ethpb.Fork, epoch primitives.Epoch, domain [4]byte, vr []byte, obj fssz.HashRoot, key bls.SecretKey) ([]byte, error) {
 	// EIP-7044: Beginning in Deneb, fix the fork version to Capella for signed exits.

beacon-chain/das/availability.go

@@ -94,6 +94,15 @@ func (s *LazilyPersistentStore) IsDataAvailable(ctx context.Context, current pri
 	entry := s.cache.ensure(key)
 	defer s.cache.delete(key)
 	root := b.Root()
+	sumz, err := s.store.WaitForSummarizer(ctx)
+	if err != nil {
+		log.WithField("root", fmt.Sprintf("%#x", b.Root())).
+			WithError(err).
+			Debug("Failed to receive BlobStorageSummarizer within IsDataAvailable")
+	} else {
+		entry.setDiskSummary(sumz.Summary(root))
+	}
+
 	// Verify we have all the expected sidecars, and fail fast if any are missing or inconsistent.
 	// We don't try to salvage problematic batches because this indicates a misbehaving peer and we'd rather
 	// ignore their response and decrease their peer score.

beacon-chain/das/cache.go

@@ -4,6 +4,7 @@ import (
 	"bytes"
 
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/db/filesystem"
 	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
@@ -59,7 +60,12 @@ func (c *cache) delete(key cacheKey) {
 
 // cacheEntry holds a fixed-length cache of BlobSidecars.
 type cacheEntry struct {
-	scs [fieldparams.MaxBlobsPerBlock]*blocks.ROBlob
+	scs         [fieldparams.MaxBlobsPerBlock]*blocks.ROBlob
+	diskSummary filesystem.BlobStorageSummary
+}
+
+func (e *cacheEntry) setDiskSummary(sum filesystem.BlobStorageSummary) {
+	e.diskSummary = sum
 }
 
 // stash adds an item to the in-memory cache of BlobSidecars.
@@ -81,9 +87,17 @@ func (e *cacheEntry) stash(sc *blocks.ROBlob) error {
 // the cache do not match those found in the block. If err is nil, then all expected
 // commitments were found in the cache and the sidecar slice return value can be used
 // to perform a DA check against the cached sidecars.
+// filter only returns blobs that need to be checked. Blobs already available on disk will be excluded.
 func (e *cacheEntry) filter(root [32]byte, kc safeCommitmentArray) ([]blocks.ROBlob, error) {
-	scs := make([]blocks.ROBlob, kc.count())
+	if e.diskSummary.AllAvailable(kc.count()) {
+		return nil, nil
+	}
+	scs := make([]blocks.ROBlob, 0, kc.count())
 	for i := uint64(0); i < fieldparams.MaxBlobsPerBlock; i++ {
+		// We already have this blob, we don't need to write it or validate it.
+		if e.diskSummary.HasIndex(i) {
+			continue
+		}
 		if kc[i] == nil {
 			if e.scs[i] != nil {
 				return nil, errors.Wrapf(errCommitmentMismatch, "root=%#x, index=%#x, commitment=%#x, no block commitment", root, i, e.scs[i].KzgCommitment)
@@ -97,7 +111,7 @@ func (e *cacheEntry) filter(root [32]byte, kc safeCommitmentArray) ([]blocks.ROB
 		if !bytes.Equal(kc[i], e.scs[i].KzgCommitment) {
 			return nil, errors.Wrapf(errCommitmentMismatch, "root=%#x, index=%#x, commitment=%#x, block commitment=%#x", root, i, e.scs[i].KzgCommitment, kc[i])
 		}
-		scs[i] = *e.scs[i]
+		scs = append(scs, *e.scs[i])
 	}
 
 	return scs, nil

beacon-chain/das/cache_test.go

@@ -3,9 +3,14 @@ package das
 import (
 	"testing"
 
+	"github.com/prysmaticlabs/prysm/v5/beacon-chain/db/filesystem"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/blocks"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
 	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/testing/util"
+	"github.com/prysmaticlabs/prysm/v5/time/slots"
 )
 
 func TestCacheEnsureDelete(t *testing.T) {
@@ -23,3 +28,145 @@ func TestCacheEnsureDelete(t *testing.T) {
 	var nilEntry *cacheEntry
 	require.Equal(t, nilEntry, c.entries[k])
 }
+
+type filterTestCaseSetupFunc func(t *testing.T) (*cacheEntry, safeCommitmentArray, []blocks.ROBlob)
+
+func filterTestCaseSetup(slot primitives.Slot, nBlobs int, onDisk []int, numExpected int) filterTestCaseSetupFunc {
+	return func(t *testing.T) (*cacheEntry, safeCommitmentArray, []blocks.ROBlob) {
+		blk, blobs := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, slot, nBlobs)
+		commits, err := commitmentsToCheck(blk, blk.Block().Slot())
+		require.NoError(t, err)
+		entry := &cacheEntry{}
+		if len(onDisk) > 0 {
+			od := map[[32]byte][]int{blk.Root(): onDisk}
+			sumz := filesystem.NewMockBlobStorageSummarizer(t, od)
+			sum := sumz.Summary(blk.Root())
+			entry.setDiskSummary(sum)
+		}
+		expected := make([]blocks.ROBlob, 0, nBlobs)
+		for i := 0; i < commits.count(); i++ {
+			if entry.diskSummary.HasIndex(uint64(i)) {
+				continue
+			}
+			// If we aren't telling the cache a blob is on disk, add it to the expected list and stash.
+			expected = append(expected, blobs[i])
+			require.NoError(t, entry.stash(&blobs[i]))
+		}
+		require.Equal(t, numExpected, len(expected))
+		return entry, commits, expected
+	}
+}
+
+func TestFilterDiskSummary(t *testing.T) {
+	denebSlot, err := slots.EpochStart(params.BeaconConfig().DenebForkEpoch)
+	require.NoError(t, err)
+	cases := []struct {
+		name  string
+		setup filterTestCaseSetupFunc
+	}{
+		{
+			name:  "full blobs, all on disk",
+			setup: filterTestCaseSetup(denebSlot, 6, []int{0, 1, 2, 3, 4, 5}, 0),
+		},
+		{
+			name:  "full blobs, first on disk",
+			setup: filterTestCaseSetup(denebSlot, 6, []int{0}, 5),
+		},
+		{
+			name:  "full blobs, middle on disk",
+			setup: filterTestCaseSetup(denebSlot, 6, []int{2}, 5),
+		},
+		{
+			name:  "full blobs, last on disk",
+			setup: filterTestCaseSetup(denebSlot, 6, []int{5}, 5),
+		},
+		{
+			name:  "full blobs, none on disk",
+			setup: filterTestCaseSetup(denebSlot, 6, []int{}, 6),
+		},
+		{
+			name:  "one commitment, on disk",
+			setup: filterTestCaseSetup(denebSlot, 1, []int{0}, 0),
+		},
+		{
+			name:  "one commitment, not on disk",
+			setup: filterTestCaseSetup(denebSlot, 1, []int{}, 1),
+		},
+		{
+			name:  "two commitments, first on disk",
+			setup: filterTestCaseSetup(denebSlot, 2, []int{0}, 1),
+		},
+		{
+			name:  "two commitments, last on disk",
+			setup: filterTestCaseSetup(denebSlot, 2, []int{1}, 1),
+		},
+		{
+			name:  "two commitments, none on disk",
+			setup: filterTestCaseSetup(denebSlot, 2, []int{}, 2),
+		},
+		{
+			name:  "two commitments, all on disk",
+			setup: filterTestCaseSetup(denebSlot, 2, []int{0, 1}, 0),
+		},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			entry, commits, expected := c.setup(t)
+			// first (root) argument doesn't matter, it is just for logs
+			got, err := entry.filter([32]byte{}, commits)
+			require.NoError(t, err)
+			require.Equal(t, len(expected), len(got))
+		})
+	}
+}
+
+func TestFilter(t *testing.T) {
+	denebSlot, err := slots.EpochStart(params.BeaconConfig().DenebForkEpoch)
+	require.NoError(t, err)
+	cases := []struct {
+		name  string
+		setup func(t *testing.T) (*cacheEntry, safeCommitmentArray, []blocks.ROBlob)
+		err   error
+	}{
+		{
+			name: "commitments mismatch - extra sidecar",
+			setup: func(t *testing.T) (*cacheEntry, safeCommitmentArray, []blocks.ROBlob) {
+				entry, commits, expected := filterTestCaseSetup(denebSlot, 6, []int{0, 1}, 4)(t)
+				commits[5] = nil
+				return entry, commits, expected
+			},
+			err: errCommitmentMismatch,
+		},
+		{
+			name: "sidecar missing",
+			setup: func(t *testing.T) (*cacheEntry, safeCommitmentArray, []blocks.ROBlob) {
+				entry, commits, expected := filterTestCaseSetup(denebSlot, 6, []int{0, 1}, 4)(t)
+				entry.scs[5] = nil
+				return entry, commits, expected
+			},
+			err: errMissingSidecar,
+		},
+		{
+			name: "commitments mismatch - different bytes",
+			setup: func(t *testing.T) (*cacheEntry, safeCommitmentArray, []blocks.ROBlob) {
+				entry, commits, expected := filterTestCaseSetup(denebSlot, 6, []int{0, 1}, 4)(t)
+				entry.scs[5].KzgCommitment = []byte("nope")
+				return entry, commits, expected
+			},
+			err: errCommitmentMismatch,
+		},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			entry, commits, expected := c.setup(t)
+			// first (root) argument doesn't matter, it is just for logs
+			got, err := entry.filter([32]byte{}, commits)
+			if c.err != nil {
+				require.ErrorIs(t, err, c.err)
+				return
+			}
+			require.NoError(t, err)
+			require.Equal(t, len(expected), len(got))
+		})
+	}
+}

beacon-chain/db/filesystem/BUILD.bazel

@@ -4,9 +4,10 @@ go_library(
     name = "go_default_library",
     srcs = [
         "blob.go",
-        "ephemeral.go",
+        "cache.go",
         "log.go",
         "metrics.go",
+        "mock.go",
         "pruner.go",
     ],
     importpath = "github.com/prysmaticlabs/prysm/v5/beacon-chain/db/filesystem",
@@ -33,6 +34,7 @@ go_test(
     name = "go_default_test",
     srcs = [
         "blob_test.go",
+        "cache_test.go",
         "pruner_test.go",
     ],
     embed = [":go_default_library"],

beacon-chain/db/filesystem/blob.go

@@ -1,7 +1,9 @@
 package filesystem
 
 import (
+	"context"
 	"fmt"
+	"math"
 	"os"
 	"path"
 	"strconv"
@@ -103,12 +105,29 @@ func (bs *BlobStorage) WarmCache() {
 		return
 	}
 	go func() {
-		if err := bs.pruner.prune(0); err != nil {
+		start := time.Now()
+		if err := bs.pruner.warmCache(); err != nil {
 			log.WithError(err).Error("Error encountered while warming up blob pruner cache")
 		}
+		log.WithField("elapsed", time.Since(start)).Info("Blob filesystem cache warm-up complete.")
 	}()
 }
 
+// ErrBlobStorageSummarizerUnavailable is a sentinel error returned when there is no pruner/cache available.
+// This should be used by code that optionally uses the summarizer to optimize rpc requests. Being able to
+// fallback when there is no summarizer allows client code to avoid test complexity where the summarizer doesn't matter.
+var ErrBlobStorageSummarizerUnavailable = errors.New("BlobStorage not initialized with a pruner or cache")
+
+// WaitForSummarizer blocks until the BlobStorageSummarizer is ready to use.
+// BlobStorageSummarizer is not ready immediately on node startup because it needs to sample the blob filesystem to
+// determine which blobs are available.
+func (bs *BlobStorage) WaitForSummarizer(ctx context.Context) (BlobStorageSummarizer, error) {
+	if bs == nil || bs.pruner == nil {
+		return nil, ErrBlobStorageSummarizerUnavailable
+	}
+	return bs.pruner.waitForCache(ctx)
+}
+
 // Save saves blobs given a list of sidecars.
 func (bs *BlobStorage) Save(sidecar blocks.VerifiedROBlob) error {
 	startTime := time.Now()
@@ -199,6 +218,101 @@ func (bs *BlobStorage) Save(sidecar blocks.VerifiedROBlob) error {
 	return nil
 }
 
+// SaveDataColumn saves a data column to our local filesystem.
+func (bs *BlobStorage) SaveDataColumn(column blocks.VerifiedRODataColumn) error {
+	startTime := time.Now()
+	fname := namerForDataColumn(column)
+	sszPath := fname.path()
+	exists, err := afero.Exists(bs.fs, sszPath)
+	if err != nil {
+		return err
+	}
+	if exists {
+		log.Debug("Ignoring a duplicate data column sidecar save attempt")
+		return nil
+	}
+	if bs.pruner != nil {
+		hRoot, err := column.SignedBlockHeader.Header.HashTreeRoot()
+		if err != nil {
+			return err
+		}
+		if err := bs.pruner.notify(hRoot, column.SignedBlockHeader.Header.Slot, column.ColumnIndex); err != nil {
+			return errors.Wrapf(err, "problem maintaining pruning cache/metrics for sidecar with root=%#x", hRoot)
+		}
+	}
+
+	// Serialize the ethpb.DataColumnSidecar to binary data using SSZ.
+	sidecarData, err := column.MarshalSSZ()
+	if err != nil {
+		return errors.Wrap(err, "failed to serialize sidecar data")
+	} else if len(sidecarData) == 0 {
+		return errSidecarEmptySSZData
+	}
+
+	if err := bs.fs.MkdirAll(fname.dir(), directoryPermissions); err != nil {
+		return err
+	}
+	partPath := fname.partPath(fmt.Sprintf("%p", sidecarData))
+
+	partialMoved := false
+	// Ensure the partial file is deleted.
+	defer func() {
+		if partialMoved {
+			return
+		}
+		// It's expected to error if the save is successful.
+		err = bs.fs.Remove(partPath)
+		if err == nil {
+			log.WithFields(logrus.Fields{
+				"partPath": partPath,
+			}).Debugf("Removed partial file")
+		}
+	}()
+
+	// Create a partial file and write the serialized data to it.
+	partialFile, err := bs.fs.Create(partPath)
+	if err != nil {
+		return errors.Wrap(err, "failed to create partial file")
+	}
+
+	n, err := partialFile.Write(sidecarData)
+	if err != nil {
+		closeErr := partialFile.Close()
+		if closeErr != nil {
+			return closeErr
+		}
+		return errors.Wrap(err, "failed to write to partial file")
+	}
+	if bs.fsync {
+		if err := partialFile.Sync(); err != nil {
+			return err
+		}
+	}
+
+	if err := partialFile.Close(); err != nil {
+		return err
+	}
+
+	if n != len(sidecarData) {
+		return fmt.Errorf("failed to write the full bytes of sidecarData, wrote only %d of %d bytes", n, len(sidecarData))
+	}
+
+	if n == 0 {
+		return errEmptyBlobWritten
+	}
+
+	// Atomically rename the partial file to its final name.
+	err = bs.fs.Rename(partPath, sszPath)
+	if err != nil {
+		return errors.Wrap(err, "failed to rename partial file to final name")
+	}
+	partialMoved = true
+	// TODO: Use new metrics for data columns
+	blobsWrittenCounter.Inc()
+	blobSaveLatency.Observe(float64(time.Since(startTime).Milliseconds()))
+	return nil
+}
+
 // Get retrieves a single BlobSidecar by its root and index.
 // Since BlobStorage only writes blobs that have undergone full verification, the return
 // value is always a VerifiedROBlob.
@@ -224,6 +338,20 @@ func (bs *BlobStorage) Get(root [32]byte, idx uint64) (blocks.VerifiedROBlob, er
 	return verification.BlobSidecarNoop(ro)
 }
 
+// GetColumn retrieves a single DataColumnSidecar by its root and index.
+func (bs *BlobStorage) GetColumn(root [32]byte, idx uint64) (*ethpb.DataColumnSidecar, error) {
+	expected := blobNamer{root: root, index: idx}
+	encoded, err := afero.ReadFile(bs.fs, expected.path())
+	if err != nil {
+		return nil, err
+	}
+	s := &ethpb.DataColumnSidecar{}
+	if err := s.UnmarshalSSZ(encoded); err != nil {
+		return nil, err
+	}
+	return s, nil
+}
+
 // Remove removes all blobs for a given root.
 func (bs *BlobStorage) Remove(root [32]byte) error {
 	rootDir := blobNamer{root: root}.dir()
@@ -267,6 +395,41 @@ func (bs *BlobStorage) Indices(root [32]byte) ([fieldparams.MaxBlobsPerBlock]boo
 	return mask, nil
 }
 
+// ColumnIndices retrieve the stored column indexes from our filesystem.
+func (bs *BlobStorage) ColumnIndices(root [32]byte) ([fieldparams.NumberOfColumns]bool, error) {
+	var mask [fieldparams.NumberOfColumns]bool
+	rootDir := blobNamer{root: root}.dir()
+	entries, err := afero.ReadDir(bs.fs, rootDir)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return mask, nil
+		}
+		return mask, err
+	}
+	for i := range entries {
+		if entries[i].IsDir() {
+			continue
+		}
+		name := entries[i].Name()
+		if !strings.HasSuffix(name, sszExt) {
+			continue
+		}
+		parts := strings.Split(name, ".")
+		if len(parts) != 2 {
+			continue
+		}
+		u, err := strconv.ParseUint(parts[0], 10, 64)
+		if err != nil {
+			return mask, errors.Wrapf(err, "unexpected directory entry breaks listing, %s", parts[0])
+		}
+		if u >= fieldparams.NumberOfColumns {
+			return mask, errIndexOutOfBounds
+		}
+		mask[u] = true
+	}
+	return mask, nil
+}
+
 // Clear deletes all files on the filesystem.
 func (bs *BlobStorage) Clear() error {
 	dirs, err := listDir(bs.fs, ".")
@@ -281,6 +444,15 @@ func (bs *BlobStorage) Clear() error {
 	return nil
 }
 
+// WithinRetentionPeriod checks if the requested epoch is within the blob retention period.
+func (bs *BlobStorage) WithinRetentionPeriod(requested, current primitives.Epoch) bool {
+	if requested > math.MaxUint64-bs.retentionEpochs {
+		// If there is an overflow, then the retention period was set to an extremely large number.
+		return true
+	}
+	return requested+bs.retentionEpochs >= current
+}
+
 type blobNamer struct {
 	root  [32]byte
 	index uint64
@@ -290,6 +462,10 @@ func namerForSidecar(sc blocks.VerifiedROBlob) blobNamer {
 	return blobNamer{root: sc.BlockRoot(), index: sc.Index}
 }
 
+func namerForDataColumn(col blocks.VerifiedRODataColumn) blobNamer {
+	return blobNamer{root: col.BlockRoot(), index: col.ColumnIndex}
+}
+
 func (p blobNamer) dir() string {
 	return rootString(p.root)
 }

beacon-chain/db/filesystem/blob_test.go

@@ -2,6 +2,7 @@ package filesystem
 
 import (
 	"bytes"
+	"math"
 	"os"
 	"path"
 	"sync"
@@ -24,8 +25,7 @@ func TestBlobStorage_SaveBlobData(t *testing.T) {
 	require.NoError(t, err)
 
 	t.Run("no error for duplicate", func(t *testing.T) {
-		fs, bs, err := NewEphemeralBlobStorageWithFs(t)
-		require.NoError(t, err)
+		fs, bs := NewEphemeralBlobStorageWithFs(t)
 		existingSidecar := testSidecars[0]
 
 		blobPath := namerForSidecar(existingSidecar).path()
@@ -129,8 +129,7 @@ func TestBlobStorage_SaveBlobData(t *testing.T) {
 // pollUntil polls a condition function until it returns true or a timeout is reached.
 
 func TestBlobIndicesBounds(t *testing.T) {
-	fs, bs, err := NewEphemeralBlobStorageWithFs(t)
-	require.NoError(t, err)
+	fs, bs := NewEphemeralBlobStorageWithFs(t)
 	root := [32]byte{}
 
 	okIdx := uint64(fieldparams.MaxBlobsPerBlock - 1)
@@ -161,8 +160,7 @@ func writeFakeSSZ(t *testing.T, fs afero.Fs, root [32]byte, idx uint64) {
 
 func TestBlobStoragePrune(t *testing.T) {
 	currentSlot := primitives.Slot(200000)
-	fs, bs, err := NewEphemeralBlobStorageWithFs(t)
-	require.NoError(t, err)
+	fs, bs := NewEphemeralBlobStorageWithFs(t)
 
 	t.Run("PruneOne", func(t *testing.T) {
 		_, sidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, 300, fieldparams.MaxBlobsPerBlock)
@@ -218,8 +216,7 @@ func TestBlobStoragePrune(t *testing.T) {
 
 func BenchmarkPruning(b *testing.B) {
 	var t *testing.T
-	_, bs, err := NewEphemeralBlobStorageWithFs(t)
-	require.NoError(t, err)
+	_, bs := NewEphemeralBlobStorageWithFs(t)
 
 	blockQty := 10000
 	currentSlot := primitives.Slot(150000)
@@ -248,3 +245,50 @@ func TestNewBlobStorage(t *testing.T) {
 	_, err = NewBlobStorage(WithBasePath(path.Join(t.TempDir(), "good")))
 	require.NoError(t, err)
 }
+
+func TestConfig_WithinRetentionPeriod(t *testing.T) {
+	retention := primitives.Epoch(16)
+	storage := &BlobStorage{retentionEpochs: retention}
+
+	cases := []struct {
+		name      string
+		requested primitives.Epoch
+		current   primitives.Epoch
+		within    bool
+	}{
+		{
+			name:      "before",
+			requested: 0,
+			current:   retention + 1,
+			within:    false,
+		},
+		{
+			name:      "same",
+			requested: 0,
+			current:   0,
+			within:    true,
+		},
+		{
+			name:      "boundary",
+			requested: 0,
+			current:   retention,
+			within:    true,
+		},
+		{
+			name:      "one less",
+			requested: retention - 1,
+			current:   retention,
+			within:    true,
+		},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			require.Equal(t, c.within, storage.WithinRetentionPeriod(c.requested, c.current))
+		})
+	}
+
+	t.Run("overflow", func(t *testing.T) {
+		storage := &BlobStorage{retentionEpochs: math.MaxUint64}
+		require.Equal(t, true, storage.WithinRetentionPeriod(1, 1))
+	})
+}

beacon-chain/db/filesystem/cache.go

@@ -0,0 +1,119 @@
+package filesystem
+
+import (
+	"sync"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+)
+
+// blobIndexMask is a bitmask representing the set of blob indices that are currently set.
+type blobIndexMask [fieldparams.MaxBlobsPerBlock]bool
+
+// BlobStorageSummary represents cached information about the BlobSidecars on disk for each root the cache knows about.
+type BlobStorageSummary struct {
+	slot primitives.Slot
+	mask blobIndexMask
+}
+
+// HasIndex returns true if the BlobSidecar at the given index is available in the filesystem.
+func (s BlobStorageSummary) HasIndex(idx uint64) bool {
+	// Protect from panic, but assume callers are sophisticated enough to not need an error telling them they have an invalid idx.
+	if idx >= fieldparams.MaxBlobsPerBlock {
+		return false
+	}
+	return s.mask[idx]
+}
+
+// AllAvailable returns true if we have all blobs for all indices from 0 to count-1.
+func (s BlobStorageSummary) AllAvailable(count int) bool {
+	if count > fieldparams.MaxBlobsPerBlock {
+		return false
+	}
+	for i := 0; i < count; i++ {
+		if !s.mask[i] {
+			return false
+		}
+	}
+	return true
+}
+
+// BlobStorageSummarizer can be used to receive a summary of metadata about blobs on disk for a given root.
+// The BlobStorageSummary can be used to check which indices (if any) are available for a given block by root.
+type BlobStorageSummarizer interface {
+	Summary(root [32]byte) BlobStorageSummary
+}
+
+type blobStorageCache struct {
+	mu     sync.RWMutex
+	nBlobs float64
+	cache  map[string]BlobStorageSummary
+}
+
+var _ BlobStorageSummarizer = &blobStorageCache{}
+
+func newBlobStorageCache() *blobStorageCache {
+	return &blobStorageCache{
+		cache: make(map[string]BlobStorageSummary, params.BeaconConfig().MinEpochsForBlobsSidecarsRequest*fieldparams.SlotsPerEpoch),
+	}
+}
+
+// Summary returns the BlobStorageSummary for `root`. The BlobStorageSummary can be used to check for the presence of
+// BlobSidecars based on Index.
+func (s *blobStorageCache) Summary(root [32]byte) BlobStorageSummary {
+	k := rootString(root)
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	return s.cache[k]
+}
+
+func (s *blobStorageCache) ensure(key string, slot primitives.Slot, idx uint64) error {
+	if idx >= fieldparams.MaxBlobsPerBlock {
+		return errIndexOutOfBounds
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	v := s.cache[key]
+	v.slot = slot
+	if !v.mask[idx] {
+		s.updateMetrics(1)
+	}
+	v.mask[idx] = true
+	s.cache[key] = v
+	return nil
+}
+
+func (s *blobStorageCache) slot(key string) (primitives.Slot, bool) {
+	s.mu.RLock()
+	defer s.mu.RUnlock()
+	v, ok := s.cache[key]
+	if !ok {
+		return 0, false
+	}
+	return v.slot, ok
+}
+
+func (s *blobStorageCache) evict(key string) {
+	var deleted float64
+	s.mu.Lock()
+	v, ok := s.cache[key]
+	if ok {
+		for i := range v.mask {
+			if v.mask[i] {
+				deleted += 1
+			}
+		}
+	}
+	delete(s.cache, key)
+	s.mu.Unlock()
+	if deleted > 0 {
+		s.updateMetrics(-deleted)
+	}
+}
+
+func (s *blobStorageCache) updateMetrics(delta float64) {
+	s.nBlobs += delta
+	blobDiskCount.Set(s.nBlobs)
+	blobDiskSize.Set(s.nBlobs * bytesPerSidecar)
+}

beacon-chain/db/filesystem/cache_test.go

@@ -0,0 +1,150 @@
+package filesystem
+
+import (
+	"testing"
+
+	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v5/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+)
+
+func TestSlotByRoot_Summary(t *testing.T) {
+	var noneSet, allSet, firstSet, lastSet, oneSet blobIndexMask
+	firstSet[0] = true
+	lastSet[len(lastSet)-1] = true
+	oneSet[1] = true
+	for i := range allSet {
+		allSet[i] = true
+	}
+	cases := []struct {
+		name     string
+		root     [32]byte
+		expected *blobIndexMask
+	}{
+		{
+			name: "not found",
+		},
+		{
+			name:     "none set",
+			expected: &noneSet,
+		},
+		{
+			name:     "index 1 set",
+			expected: &oneSet,
+		},
+		{
+			name:     "all set",
+			expected: &allSet,
+		},
+		{
+			name:     "first set",
+			expected: &firstSet,
+		},
+		{
+			name:     "last set",
+			expected: &lastSet,
+		},
+	}
+	sc := newBlobStorageCache()
+	for _, c := range cases {
+		if c.expected != nil {
+			key := rootString(bytesutil.ToBytes32([]byte(c.name)))
+			sc.cache[key] = BlobStorageSummary{slot: 0, mask: *c.expected}
+		}
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			key := bytesutil.ToBytes32([]byte(c.name))
+			sum := sc.Summary(key)
+			for i := range c.expected {
+				ui := uint64(i)
+				if c.expected == nil {
+					require.Equal(t, false, sum.HasIndex(ui))
+				} else {
+					require.Equal(t, c.expected[i], sum.HasIndex(ui))
+				}
+			}
+		})
+	}
+}
+
+func TestAllAvailable(t *testing.T) {
+	idxUpTo := func(u int) []int {
+		r := make([]int, u)
+		for i := range r {
+			r[i] = i
+		}
+		return r
+	}
+	require.DeepEqual(t, []int{}, idxUpTo(0))
+	require.DeepEqual(t, []int{0}, idxUpTo(1))
+	require.DeepEqual(t, []int{0, 1, 2, 3, 4, 5}, idxUpTo(6))
+	cases := []struct {
+		name   string
+		idxSet []int
+		count  int
+		aa     bool
+	}{
+		{
+			// If there are no blobs committed, then all the committed blobs are available.
+			name:  "none in idx, 0 arg",
+			count: 0,
+			aa:    true,
+		},
+		{
+			name:  "none in idx, 1 arg",
+			count: 1,
+			aa:    false,
+		},
+		{
+			name:   "first in idx, 1 arg",
+			idxSet: []int{0},
+			count:  1,
+			aa:     true,
+		},
+		{
+			name:   "second in idx, 1 arg",
+			idxSet: []int{1},
+			count:  1,
+			aa:     false,
+		},
+		{
+			name:   "first missing, 2 arg",
+			idxSet: []int{1},
+			count:  2,
+			aa:     false,
+		},
+		{
+			name:  "all missing, 1 arg",
+			count: 6,
+			aa:    false,
+		},
+		{
+			name:  "out of bound is safe",
+			count: fieldparams.MaxBlobsPerBlock + 1,
+			aa:    false,
+		},
+		{
+			name:   "max present",
+			count:  fieldparams.MaxBlobsPerBlock,
+			idxSet: idxUpTo(fieldparams.MaxBlobsPerBlock),
+			aa:     true,
+		},
+		{
+			name:   "one present",
+			count:  1,
+			idxSet: idxUpTo(1),
+			aa:     true,
+		},
+	}
+	for _, c := range cases {
+		t.Run(c.name, func(t *testing.T) {
+			var mask blobIndexMask
+			for _, idx := range c.idxSet {
+				mask[idx] = true
+			}
+			sum := BlobStorageSummary{mask: mask}
+			require.Equal(t, c.aa, sum.AllAvailable(c.count))
+		})
+	}
+}

beacon-chain/db/filesystem/mock.go

@@ -12,7 +12,7 @@ import (
 // improving test performance and simplifying cleanup.
 func NewEphemeralBlobStorage(t testing.TB) *BlobStorage {
 	fs := afero.NewMemMapFs()
-	pruner, err := newBlobPruner(fs, params.BeaconConfig().MinEpochsForBlobsSidecarsRequest)
+	pruner, err := newBlobPruner(fs, params.BeaconConfig().MinEpochsForBlobsSidecarsRequest, withWarmedCache())
 	if err != nil {
 		t.Fatal("test setup issue", err)
 	}
@@ -21,13 +21,13 @@ func NewEphemeralBlobStorage(t testing.TB) *BlobStorage {
 
 // NewEphemeralBlobStorageWithFs can be used by tests that want access to the virtual filesystem
 // in order to interact with it outside the parameters of the BlobStorage api.
-func NewEphemeralBlobStorageWithFs(t testing.TB) (afero.Fs, *BlobStorage, error) {
+func NewEphemeralBlobStorageWithFs(t testing.TB) (afero.Fs, *BlobStorage) {
 	fs := afero.NewMemMapFs()
-	pruner, err := newBlobPruner(fs, params.BeaconConfig().MinEpochsForBlobsSidecarsRequest)
+	pruner, err := newBlobPruner(fs, params.BeaconConfig().MinEpochsForBlobsSidecarsRequest, withWarmedCache())
 	if err != nil {
 		t.Fatal("test setup issue", err)
 	}
-	return fs, &BlobStorage{fs: fs, pruner: pruner}, nil
+	return fs, &BlobStorage{fs: fs, pruner: pruner}
 }
 
 type BlobMocker struct {
@@ -61,3 +61,15 @@ func NewEphemeralBlobStorageWithMocker(_ testing.TB) (*BlobMocker, *BlobStorage)
 	bs := &BlobStorage{fs: fs}
 	return &BlobMocker{fs: fs, bs: bs}, bs
 }
+
+func NewMockBlobStorageSummarizer(t *testing.T, set map[[32]byte][]int) BlobStorageSummarizer {
+	c := newBlobStorageCache()
+	for k, v := range set {
+		for i := range v {
+			if err := c.ensure(rootString(k), 0, uint64(v[i])); err != nil {
+				t.Fatal(err)
+			}
+		}
+	}
+	return c
+}

beacon-chain/db/filesystem/pruner.go

@@ -1,6 +1,7 @@
 package filesystem
 
 import (
+	"context"
 	"encoding/binary"
 	"io"
 	"path"
@@ -12,7 +13,6 @@ import (
 	"time"
 
 	"github.com/pkg/errors"
-	fieldparams "github.com/prysmaticlabs/prysm/v5/config/fieldparams"
 	"github.com/prysmaticlabs/prysm/v5/config/params"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	"github.com/prysmaticlabs/prysm/v5/time/slots"
@@ -32,22 +32,39 @@ type blobPruner struct {
 	sync.Mutex
 	prunedBefore atomic.Uint64
 	windowSize   primitives.Slot
-	slotMap      *slotForRoot
+	cache        *blobStorageCache
+	cacheReady   chan struct{}
+	warmed       bool
 	fs           afero.Fs
 }
 
-func newBlobPruner(fs afero.Fs, retain primitives.Epoch) (*blobPruner, error) {
+type prunerOpt func(*blobPruner) error
+
+func withWarmedCache() prunerOpt {
+	return func(p *blobPruner) error {
+		return p.warmCache()
+	}
+}
+
+func newBlobPruner(fs afero.Fs, retain primitives.Epoch, opts ...prunerOpt) (*blobPruner, error) {
 	r, err := slots.EpochStart(retain + retentionBuffer)
 	if err != nil {
 		return nil, errors.Wrap(err, "could not set retentionSlots")
 	}
-	return &blobPruner{fs: fs, windowSize: r, slotMap: newSlotForRoot()}, nil
+	cw := make(chan struct{})
+	p := &blobPruner{fs: fs, windowSize: r, cache: newBlobStorageCache(), cacheReady: cw}
+	for _, o := range opts {
+		if err := o(p); err != nil {
+			return nil, err
+		}
+	}
+	return p, nil
 }
 
 // notify updates the pruner's view of root->blob mappings. This allows the pruner to build a cache
 // of root->slot mappings and decide when to evict old blobs based on the age of present blobs.
 func (p *blobPruner) notify(root [32]byte, latest primitives.Slot, idx uint64) error {
-	if err := p.slotMap.ensure(rootString(root), latest, idx); err != nil {
+	if err := p.cache.ensure(rootString(root), latest, idx); err != nil {
 		return err
 	}
 	pruned := uint64(windowMin(latest, p.windowSize))
@@ -55,6 +72,8 @@ func (p *blobPruner) notify(root [32]byte, latest primitives.Slot, idx uint64) e
 		return nil
 	}
 	go func() {
+		p.Lock()
+		defer p.Unlock()
 		if err := p.prune(primitives.Slot(pruned)); err != nil {
 			log.WithError(err).Errorf("Failed to prune blobs from slot %d", latest)
 		}
@@ -62,7 +81,7 @@ func (p *blobPruner) notify(root [32]byte, latest primitives.Slot, idx uint64) e
 	return nil
 }
 
-func windowMin(latest primitives.Slot, offset primitives.Slot) primitives.Slot {
+func windowMin(latest, offset primitives.Slot) primitives.Slot {
 	// Safely compute the first slot in the epoch for the latest slot
 	latest = latest - latest%params.BeaconConfig().SlotsPerEpoch
 	if latest < offset {
@@ -71,12 +90,32 @@ func windowMin(latest primitives.Slot, offset primitives.Slot) primitives.Slot {
 	return latest - offset
 }
 
+func (p *blobPruner) warmCache() error {
+	p.Lock()
+	defer p.Unlock()
+	if err := p.prune(0); err != nil {
+		return err
+	}
+	if !p.warmed {
+		p.warmed = true
+		close(p.cacheReady)
+	}
+	return nil
+}
+
+func (p *blobPruner) waitForCache(ctx context.Context) (*blobStorageCache, error) {
+	select {
+	case <-p.cacheReady:
+		return p.cache, nil
+	case <-ctx.Done():
+		return nil, ctx.Err()
+	}
+}
+
 // Prune prunes blobs in the base directory based on the retention epoch.
 // It deletes blobs older than currentEpoch - (retentionEpochs+bufferEpochs).
 // This is so that we keep a slight buffer and blobs are deleted after n+2 epochs.
 func (p *blobPruner) prune(pruneBefore primitives.Slot) error {
-	p.Lock()
-	defer p.Unlock()
 	start := time.Now()
 	totalPruned, totalErr := 0, 0
 	// Customize logging/metrics behavior for the initial cache warmup when slot=0.
@@ -122,7 +161,7 @@ func shouldRetain(slot, pruneBefore primitives.Slot) bool {
 
 func (p *blobPruner) tryPruneDir(dir string, pruneBefore primitives.Slot) (int, error) {
 	root := rootFromDir(dir)
-	slot, slotCached := p.slotMap.slot(root)
+	slot, slotCached := p.cache.slot(root)
 	// Return early if the slot is cached and doesn't need pruning.
 	if slotCached && shouldRetain(slot, pruneBefore) {
 		return 0, nil
@@ -151,7 +190,7 @@ func (p *blobPruner) tryPruneDir(dir string, pruneBefore primitives.Slot) (int,
 			if err != nil {
 				return 0, errors.Wrapf(err, "index could not be determined for blob file %s", scFiles[i])
 			}
-			if err := p.slotMap.ensure(root, slot, idx); err != nil {
+			if err := p.cache.ensure(root, slot, idx); err != nil {
 				return 0, errors.Wrapf(err, "could not update prune cache for blob file %s", scFiles[i])
 			}
 		}
@@ -179,7 +218,7 @@ func (p *blobPruner) tryPruneDir(dir string, pruneBefore primitives.Slot) (int,
 		return removed, errors.Wrapf(err, "unable to remove blob directory %s", dir)
 	}
 
-	p.slotMap.evict(rootFromDir(dir))
+	p.cache.evict(rootFromDir(dir))
 	return len(scFiles), nil
 }
 
@@ -269,71 +308,3 @@ func filterSsz(s string) bool {
 func filterPart(s string) bool {
 	return filepath.Ext(s) == dotPartExt
 }
-
-func newSlotForRoot() *slotForRoot {
-	return &slotForRoot{
-		cache: make(map[string]*slotCacheEntry, params.BeaconConfig().MinEpochsForBlobsSidecarsRequest*fieldparams.SlotsPerEpoch),
-	}
-}
-
-type slotCacheEntry struct {
-	slot primitives.Slot
-	mask [fieldparams.MaxBlobsPerBlock]bool
-}
-
-type slotForRoot struct {
-	sync.RWMutex
-	nBlobs float64
-	cache  map[string]*slotCacheEntry
-}
-
-func (s *slotForRoot) updateMetrics(delta float64) {
-	s.nBlobs += delta
-	blobDiskCount.Set(s.nBlobs)
-	blobDiskSize.Set(s.nBlobs * bytesPerSidecar)
-}
-
-func (s *slotForRoot) ensure(key string, slot primitives.Slot, idx uint64) error {
-	if idx >= fieldparams.MaxBlobsPerBlock {
-		return errIndexOutOfBounds
-	}
-	s.Lock()
-	defer s.Unlock()
-	v, ok := s.cache[key]
-	if !ok {
-		v = &slotCacheEntry{}
-	}
-	v.slot = slot
-	if !v.mask[idx] {
-		s.updateMetrics(1)
-	}
-	v.mask[idx] = true
-	s.cache[key] = v
-	return nil
-}
-
-func (s *slotForRoot) slot(key string) (primitives.Slot, bool) {
-	s.RLock()
-	defer s.RUnlock()
-	v, ok := s.cache[key]
-	if !ok {
-		return 0, false
-	}
-	return v.slot, ok
-}
-
-func (s *slotForRoot) evict(key string) {
-	s.Lock()
-	defer s.Unlock()
-	v, ok := s.cache[key]
-	var deleted float64
-	if ok {
-		for i := range v.mask {
-			if v.mask[i] {
-				deleted += 1
-			}
-		}
-		s.updateMetrics(-deleted)
-	}
-	delete(s.cache, key)
-}

beacon-chain/db/filesystem/pruner_test.go

@@ -28,7 +28,7 @@ func TestTryPruneDir_CachedNotExpired(t *testing.T) {
 	root := fmt.Sprintf("%#x", sc.BlockRoot())
 	// This slot is right on the edge of what would need to be pruned, so by adding it to the cache and
 	// skipping any other test setup, we can be certain the hot cache path never touches the filesystem.
-	require.NoError(t, pr.slotMap.ensure(root, sc.Slot(), 0))
+	require.NoError(t, pr.cache.ensure(root, sc.Slot(), 0))
 	pruned, err := pr.tryPruneDir(root, pr.windowSize)
 	require.NoError(t, err)
 	require.Equal(t, 0, pruned)
@@ -45,14 +45,13 @@ func TestTryPruneDir_CachedExpired(t *testing.T) {
 		require.NoError(t, err)
 		root := fmt.Sprintf("%#x", sc.BlockRoot())
 		require.NoError(t, fs.Mkdir(root, directoryPermissions)) // make empty directory
-		require.NoError(t, pr.slotMap.ensure(root, sc.Slot(), 0))
+		require.NoError(t, pr.cache.ensure(root, sc.Slot(), 0))
 		pruned, err := pr.tryPruneDir(root, slot+1)
 		require.NoError(t, err)
 		require.Equal(t, 0, pruned)
 	})
 	t.Run("blobs to delete", func(t *testing.T) {
-		fs, bs, err := NewEphemeralBlobStorageWithFs(t)
-		require.NoError(t, err)
+		fs, bs := NewEphemeralBlobStorageWithFs(t)
 		var slot primitives.Slot = 0
 		_, sidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, slot, 2)
 		scs, err := verification.BlobSidecarSliceNoop(sidecars)
@@ -63,7 +62,7 @@ func TestTryPruneDir_CachedExpired(t *testing.T) {
 
 		// check that the root->slot is cached
 		root := fmt.Sprintf("%#x", scs[0].BlockRoot())
-		cs, cok := bs.pruner.slotMap.slot(root)
+		cs, cok := bs.pruner.cache.slot(root)
 		require.Equal(t, true, cok)
 		require.Equal(t, slot, cs)
 
@@ -83,8 +82,7 @@ func TestTryPruneDir_CachedExpired(t *testing.T) {
 
 func TestTryPruneDir_SlotFromFile(t *testing.T) {
 	t.Run("expired blobs deleted", func(t *testing.T) {
-		fs, bs, err := NewEphemeralBlobStorageWithFs(t)
-		require.NoError(t, err)
+		fs, bs := NewEphemeralBlobStorageWithFs(t)
 		var slot primitives.Slot = 0
 		_, sidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, slot, 2)
 		scs, err := verification.BlobSidecarSliceNoop(sidecars)
@@ -95,12 +93,12 @@ func TestTryPruneDir_SlotFromFile(t *testing.T) {
 
 		// check that the root->slot is cached
 		root := fmt.Sprintf("%#x", scs[0].BlockRoot())
-		cs, ok := bs.pruner.slotMap.slot(root)
+		cs, ok := bs.pruner.cache.slot(root)
 		require.Equal(t, true, ok)
 		require.Equal(t, slot, cs)
 		// evict it from the cache so that we trigger the file read path
-		bs.pruner.slotMap.evict(root)
-		_, ok = bs.pruner.slotMap.slot(root)
+		bs.pruner.cache.evict(root)
+		_, ok = bs.pruner.cache.slot(root)
 		require.Equal(t, false, ok)
 
 		// ensure that we see the saved files in the filesystem
@@ -116,10 +114,9 @@ func TestTryPruneDir_SlotFromFile(t *testing.T) {
 		require.Equal(t, 0, len(files))
 	})
 	t.Run("not expired, intact", func(t *testing.T) {
-		fs, bs, err := NewEphemeralBlobStorageWithFs(t)
-		require.NoError(t, err)
+		fs, bs := NewEphemeralBlobStorageWithFs(t)
 		// Set slot equal to the window size, so it should be retained.
-		var slot primitives.Slot = bs.pruner.windowSize
+		slot := bs.pruner.windowSize
 		_, sidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, slot, 2)
 		scs, err := verification.BlobSidecarSliceNoop(sidecars)
 		require.NoError(t, err)
@@ -129,8 +126,8 @@ func TestTryPruneDir_SlotFromFile(t *testing.T) {
 
 		// Evict slot mapping from the cache so that we trigger the file read path.
 		root := fmt.Sprintf("%#x", scs[0].BlockRoot())
-		bs.pruner.slotMap.evict(root)
-		_, ok := bs.pruner.slotMap.slot(root)
+		bs.pruner.cache.evict(root)
+		_, ok := bs.pruner.cache.slot(root)
 		require.Equal(t, false, ok)
 
 		// Ensure that we see the saved files in the filesystem.
@@ -184,8 +181,7 @@ func TestSlotFromFile(t *testing.T) {
 	}
 	for _, c := range cases {
 		t.Run(fmt.Sprintf("slot %d", c.slot), func(t *testing.T) {
-			fs, bs, err := NewEphemeralBlobStorageWithFs(t)
-			require.NoError(t, err)
+			fs, bs := NewEphemeralBlobStorageWithFs(t)
 			_, sidecars := util.GenerateTestDenebBlockWithSidecar(t, [32]byte{}, c.slot, 1)
 			sc, err := verification.BlobSidecarNoop(sidecars[0])
 			require.NoError(t, err)
@@ -243,10 +239,8 @@ func TestListDir(t *testing.T) {
 	}
 	blobWithSszAndTmp := dirFiles{name: "0x1234567890", isDir: true,
 		children: []dirFiles{{name: "5.ssz"}, {name: "0.part"}}}
-	fsLayout.children = append(fsLayout.children, notABlob)
-	fsLayout.children = append(fsLayout.children, childlessBlob)
-	fsLayout.children = append(fsLayout.children, blobWithSsz)
-	fsLayout.children = append(fsLayout.children, blobWithSszAndTmp)
+	fsLayout.children = append(fsLayout.children,
+		notABlob, childlessBlob, blobWithSsz, blobWithSszAndTmp)
 
 	topChildren := make([]string, len(fsLayout.children))
 	for i := range fsLayout.children {
@@ -282,10 +276,7 @@ func TestListDir(t *testing.T) {
 			dirPath:  ".",
 			expected: []string{notABlob.name},
 			filter: func(s string) bool {
-				if s == notABlob.name {
-					return true
-				}
-				return false
+				return s == notABlob.name
 			},
 		},
 		{

beacon-chain/db/iface/interface.go

@@ -118,7 +118,7 @@ type HeadAccessDatabase interface {
 // SlasherDatabase interface for persisting data related to detecting slashable offenses on Ethereum.
 type SlasherDatabase interface {
 	io.Closer
-	SaveLastEpochsWrittenForValidators(
+	SaveLastEpochWrittenForValidators(
 		ctx context.Context, epochByValidator map[primitives.ValidatorIndex]primitives.Epoch,
 	) error
 	SaveAttestationRecordsForValidators(

beacon-chain/db/kv/BUILD.bazel

@@ -20,6 +20,7 @@ go_library(
         "migration.go",
         "migration_archived_index.go",
         "migration_block_slot_index.go",
+        "migration_finalized_parent.go",
         "migration_state_validators.go",
         "schema.go",
         "state.go",

beacon-chain/db/kv/finalized_block_roots.go

@@ -201,21 +201,20 @@ 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[:])

beacon-chain/db/kv/finalized_block_roots_test.go

@@ -237,6 +237,50 @@ func makeBlocksAltair(t *testing.T, startIdx, num uint64, previousRoot [32]byte)
 	return ifaceBlocks
 }
 
+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.
+	}
+	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) {
 	db := setupDB(t)
 	ctx := context.Background()
@@ -252,23 +296,23 @@ 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/migration.go

@@ -14,6 +14,7 @@ var migrations = []migration{
 	migrateArchivedIndex,
 	migrateBlockSlotIndex,
 	migrateStateValidators,
+	migrateFinalizedParent,
 }
 
 // RunMigrations defined in the migrations array.

beacon-chain/db/kv/migration_finalized_parent.go

@@ -0,0 +1,87 @@
+package kv
+
+import (
+	"bytes"
+	"context"
+	"fmt"
+
+	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v5/config/params"
+	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
+	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	bolt "go.etcd.io/bbolt"
+)
+
+var migrationFinalizedParent = []byte("parent_bug_32fb183")
+
+func migrateFinalizedParent(ctx context.Context, db *bolt.DB) error {
+	if updateErr := db.Update(func(tx *bolt.Tx) error {
+		mb := tx.Bucket(migrationsBucket)
+		if b := mb.Get(migrationFinalizedParent); bytes.Equal(b, migrationCompleted) {
+			return nil // Migration already completed.
+		}
+
+		bkt := tx.Bucket(finalizedBlockRootsIndexBucket)
+		if bkt == nil {
+			return fmt.Errorf("unable to read %s bucket for migration", finalizedBlockRootsIndexBucket)
+		}
+		bb := tx.Bucket(blocksBucket)
+		if bb == nil {
+			return fmt.Errorf("unable to read %s bucket for migration", blocksBucket)
+		}
+
+		c := bkt.Cursor()
+		var slotsWithoutBug primitives.Slot
+		maxBugSearch := params.BeaconConfig().SlotsPerEpoch * 10
+		for k, v := c.Last(); k != nil; k, v = c.Prev() {
+			// check if context is cancelled in between
+			if ctx.Err() != nil {
+				return ctx.Err()
+			}
+
+			idxEntry := &ethpb.FinalizedBlockRootContainer{}
+			if err := decode(ctx, v, idxEntry); err != nil {
+				return errors.Wrapf(err, "unable to decode finalized block root container for root=%#x", k)
+			}
+			// Not one of the corrupt values
+			if !bytes.Equal(idxEntry.ParentRoot, k) {
+				slotsWithoutBug += 1
+				if slotsWithoutBug > maxBugSearch {
+					break
+				}
+				continue
+			}
+			slotsWithoutBug = 0
+			log.WithField("root", fmt.Sprintf("%#x", k)).Debug("found index entry with incorrect parent root")
+
+			// Look up full block to get the correct parent root.
+			encBlk := bb.Get(k)
+			if encBlk == nil {
+				return errors.Wrapf(ErrNotFound, "could not find block for corrupt finalized index entry %#x", k)
+			}
+			blk, err := unmarshalBlock(ctx, encBlk)
+			if err != nil {
+				return errors.Wrapf(err, "unable to decode block for root=%#x", k)
+			}
+			// Replace parent root in the index with the correct value and write it back.
+			pr := blk.Block().ParentRoot()
+			idxEntry.ParentRoot = pr[:]
+			idxEnc, err := encode(ctx, idxEntry)
+			if err != nil {
+				return errors.Wrapf(err, "failed to encode finalized index entry for root=%#x", k)
+			}
+			if err := bkt.Put(k, idxEnc); err != nil {
+				return errors.Wrapf(err, "failed to update finalized index entry for root=%#x", k)
+			}
+			log.WithField("root", fmt.Sprintf("%#x", k)).
+				WithField("parentRoot", fmt.Sprintf("%#x", idxEntry.ParentRoot)).
+				Debug("updated corrupt index entry with correct parent")
+		}
+		// Mark migration complete.
+		return mb.Put(migrationFinalizedParent, migrationCompleted)
+	}); updateErr != nil {
+		log.WithError(updateErr).Errorf("could not run finalized parent root index repair migration")
+		return updateErr
+	}
+	return nil
+}

beacon-chain/db/slasherkv/slasher.go

@@ -70,12 +70,12 @@ func (s *Store) LastEpochWrittenForValidators(
 	return attestedEpochs, err
 }
 
-// SaveLastEpochsWrittenForValidators updates the latest epoch a slice
-// of validator indices has attested to.
-func (s *Store) SaveLastEpochsWrittenForValidators(
+// SaveLastEpochWrittenForValidators saves the latest epoch
+// that each validator has attested to in the provided map.
+func (s *Store) SaveLastEpochWrittenForValidators(
 	ctx context.Context, epochByValIndex map[primitives.ValidatorIndex]primitives.Epoch,
 ) error {
-	ctx, span := trace.StartSpan(ctx, "BeaconDB.SaveLastEpochsWrittenForValidators")
+	ctx, span := trace.StartSpan(ctx, "BeaconDB.SaveLastEpochWrittenForValidators")
 	defer span.End()
 
 	const batchSize = 10000
@@ -157,7 +157,7 @@ func (s *Store) CheckAttesterDoubleVotes(
 				attRecordsBkt := tx.Bucket(attestationRecordsBucket)
 
 				encEpoch := encodeTargetEpoch(attToProcess.IndexedAttestation.Data.Target.Epoch)
-				localDoubleVotes := []*slashertypes.AttesterDoubleVote{}
+				localDoubleVotes := make([]*slashertypes.AttesterDoubleVote, 0)
 
 				for _, valIdx := range attToProcess.IndexedAttestation.AttestingIndices {
 					// Check if there is signing root in the database for this combination
@@ -166,7 +166,7 @@ func (s *Store) CheckAttesterDoubleVotes(
 					validatorEpochKey := append(encEpoch, encIdx...)
 					attRecordsKey := signingRootsBkt.Get(validatorEpochKey)
 
-					// An attestation record key is comprised of a signing root (32 bytes).
+					// An attestation record key consists of a signing root (32 bytes).
 					if len(attRecordsKey) < attestationRecordKeySize {
 						// If there is no signing root for this combination,
 						// then there is no double vote. We can continue to the next validator.
@@ -697,7 +697,7 @@ func decodeSlasherChunk(enc []byte) ([]uint16, error) {
 }
 
 // Encode attestation record to bytes.
-// The output encoded attestation record consists in the signing root concatened with the compressed attestation record.
+// The output encoded attestation record consists in the signing root concatenated with the compressed attestation record.
 func encodeAttestationRecord(att *slashertypes.IndexedAttestationWrapper) ([]byte, error) {
 	if att == nil || att.IndexedAttestation == nil {
 		return []byte{}, errors.New("nil proposal record")
@@ -716,7 +716,7 @@ func encodeAttestationRecord(att *slashertypes.IndexedAttestationWrapper) ([]byt
 }
 
 // Decode attestation record from bytes.
-// The input encoded attestation record consists in the signing root concatened with the compressed attestation record.
+// The input encoded attestation record consists in the signing root concatenated with the compressed attestation record.
 func decodeAttestationRecord(encoded []byte) (*slashertypes.IndexedAttestationWrapper, error) {
 	if len(encoded) < rootSize {
 		return nil, fmt.Errorf("wrong length for encoded attestation record, want minimum %d, got %d", rootSize, len(encoded))

beacon-chain/db/slasherkv/slasher_test.go

@@ -89,7 +89,7 @@ func TestStore_LastEpochWrittenForValidators(t *testing.T) {
 	require.NoError(t, err)
 	require.Equal(t, 0, len(attestedEpochs))
 
-	err = beaconDB.SaveLastEpochsWrittenForValidators(ctx, epochsByValidator)
+	err = beaconDB.SaveLastEpochWrittenForValidators(ctx, epochsByValidator)
 	require.NoError(t, err)
 
 	retrievedEpochs, err := beaconDB.LastEpochWrittenForValidators(ctx, indices)

beacon-chain/execution/prometheus_test.go

@@ -10,7 +10,7 @@ import (
 )
 
 // TestCleanup ensures that the cleanup function unregisters the prometheus.Collection
-// also tests the interchangability of the explicit prometheus Register/Unregister
+// also tests the interchangeability of the explicit prometheus Register/Unregister
 // and the implicit methods within the collector implementation
 func TestCleanup(t *testing.T) {
 	ctx := context.Background()
@@ -32,11 +32,11 @@ func TestCleanup(t *testing.T) {
 	assert.Equal(t, true, unregistered, "prometheus.Unregister failed to unregister PowchainCollector on final cleanup")
 }
 
-// TestCancelation tests that canceling the context passed into
+// TestCancellation tests that canceling the context passed into
 // NewPowchainCollector cleans everything up as expected. This
 // does come at the cost of an extra channel cluttering up
 // PowchainCollector, just for this test.
-func TestCancelation(t *testing.T) {
+func TestCancellation(t *testing.T) {
 	ctx, cancel := context.WithCancel(context.Background())
 	pc, err := NewPowchainCollector(ctx)
 	assert.NoError(t, err, "Unexpected error calling NewPowchainCollector")

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
 }
 
@@ -561,9 +643,7 @@ func (b *BeaconNode) startSlasherDB(cliCtx *cli.Context) error {
 		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 = slasherkv.NewKVStore(b.ctx, dbPath)
 		if err != nil {
 			return errors.Wrap(err, "could not create new database")
@@ -610,31 +690,32 @@ 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),
+		QUICPort:             cliCtx.Uint(cmd.P2PQUICPort.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 +1057,13 @@ 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 +1157,9 @@ 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/node_test.go

@@ -217,9 +217,9 @@ func Test_hasNetworkFlag(t *testing.T) {
 		want         bool
 	}{
 		{
-			name:         "Prater testnet",
-			networkName:  features.PraterTestnet.Name,
-			networkValue: "prater",
+			name:         "Holesky testnet",
+			networkName:  features.HoleskyTestnet.Name,
+			networkValue: "holesky",
 			want:         true,
 		},
 		{

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

@@ -46,6 +46,7 @@ go_library(
         "//beacon-chain/core/altair:go_default_library",
         "//beacon-chain/core/feed/state:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/core/peerdas:go_default_library",
         "//beacon-chain/core/time:go_default_library",
         "//beacon-chain/db:go_default_library",
         "//beacon-chain/p2p/encoder:go_default_library",
@@ -56,6 +57,7 @@ go_library(
         "//beacon-chain/startup:go_default_library",
         "//cmd/beacon-chain/flags:go_default_library",
         "//config/features:go_default_library",
+        "//config/fieldparams:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",
         "//consensus-types/wrapper:go_default_library",
@@ -90,10 +92,12 @@ go_library(
         "@com_github_libp2p_go_libp2p//core/peerstore:go_default_library",
         "@com_github_libp2p_go_libp2p//core/protocol:go_default_library",
         "@com_github_libp2p_go_libp2p//p2p/security/noise:go_default_library",
+        "@com_github_libp2p_go_libp2p//p2p/transport/quic:go_default_library",
         "@com_github_libp2p_go_libp2p//p2p/transport/tcp:go_default_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",