Fix Bad Merge in V4 (#12183 )

Add Pubsub Metrics Tracer (#12178 )
* add tracer * gaz * preston's review * preston's review
2026-01-10 13:58:09 -05:00 · 2023-03-24 14:05:31 +00:00 · 2023-03-24 12:36:10 +08:00 · 2023-03-22 09:12:54 +08:00 · 2023-03-21 18:39:40 +00:00 · 2023-03-21 18:08:05 +00:00
2271 changed files with 18419 additions and 18370 deletions
--- a/.bazelversion
+++ b/.bazelversion
@@ -1 +1 @@
-5.3.0
+6.1.0
--- a/.deepsource.toml
+++ b/.deepsource.toml
@@ -11,7 +11,7 @@ name = "go"
 enabled = true

 [analyzers.meta]
-import_paths = ["github.com/prysmaticlabs/prysm/v3"]
+import_paths = ["github.com/prysmaticlabs/prysm/v4"]

 [[analyzers]]
 name = "test-coverage"
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -12,7 +12,7 @@ exports_files([
    "LICENSE.md",
 ])

-# gazelle:prefix github.com/prysmaticlabs/prysm/v3
+# gazelle:prefix github.com/prysmaticlabs/prysm/v4
 # gazelle:map_kind go_library go_library @prysm//tools/go:def.bzl
 # gazelle:map_kind go_test go_test @prysm//tools/go:def.bzl
 # gazelle:map_kind go_repository go_repository @prysm//tools/go:def.bzl
--- a/50
+++ b/50
@@ -4,15 +4,18 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")

 http_archive(
-    name = "bazel_toolchains",
-    sha256 = "8e0633dfb59f704594f19ae996a35650747adc621ada5e8b9fb588f808c89cb0",
-    strip_prefix = "bazel-toolchains-3.7.0",
+    name = "rules_pkg",
+    sha256 = "8c20f74bca25d2d442b327ae26768c02cf3c99e93fad0381f32be9aab1967675",
    urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/bazel-toolchains/releases/download/3.7.0/bazel-toolchains-3.7.0.tar.gz",
-        "https://github.com/bazelbuild/bazel-toolchains/releases/download/3.7.0/bazel-toolchains-3.7.0.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_pkg/releases/download/0.8.1/rules_pkg-0.8.1.tar.gz",
+        "https://github.com/bazelbuild/rules_pkg/releases/download/0.8.1/rules_pkg-0.8.1.tar.gz",
    ],
 )

+load("@rules_pkg//:deps.bzl", "rules_pkg_dependencies")
+
+rules_pkg_dependencies()
+
 http_archive(
    name = "com_grail_bazel_toolchain",
    sha256 = "b210fc8e58782ef171f428bfc850ed7179bdd805543ebd1aa144b9c93489134f",
@@ -39,10 +42,6 @@ load("@prysm//tools/cross-toolchain:prysm_toolchains.bzl", "configure_prysm_tool

 configure_prysm_toolchains()

-load("@prysm//tools/cross-toolchain:rbe_toolchains_config.bzl", "rbe_toolchains_config")
-
-rbe_toolchains_config()
-
 load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

 http_archive(
@@ -87,10 +86,10 @@ http_archive(
        # Expose internals of go_test for custom build transitions.
        "//third_party:io_bazel_rules_go_test.patch",
    ],
-    sha256 = "ae013bf35bd23234d1dea46b079f1e05ba74ac0321423830119d3e787ec73483",
+    sha256 = "dd926a88a564a9246713a9c00b35315f54cbd46b31a26d5d8fb264c07045f05d",
    urls = [
-        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.36.0/rules_go-v0.36.0.zip",
-        "https://github.com/bazelbuild/rules_go/releases/download/v0.36.0/rules_go-v0.36.0.zip",
+        "https://mirror.bazel.build/github.com/bazelbuild/rules_go/releases/download/v0.38.1/rules_go-v0.38.1.zip",
+        "https://github.com/bazelbuild/rules_go/releases/download/v0.38.1/rules_go-v0.38.1.zip",
    ],
 )

@@ -165,7 +164,7 @@ load("@io_bazel_rules_go//go:deps.bzl", "go_register_toolchains", "go_rules_depe
 go_rules_dependencies()

 go_register_toolchains(
-    go_version = "1.19.4",
+    go_version = "1.19.7",
    nogo = "@//:nogo",
 )

@@ -191,7 +190,22 @@ filegroup(
    url = "https://github.com/eth-clients/slashing-protection-interchange-tests/archive/b8413ca42dc92308019d0d4db52c87e9e125c4e9.tar.gz",
 )

-consensus_spec_version = "v1.3.0-rc.3"
+http_archive(
+    name = "eip4881_spec_tests",
+    build_file_content = """
+filegroup(
+    name = "test_data",
+    srcs = glob([
+        "**/*.yaml",
+    ]),
+    visibility = ["//visibility:public"],
+)
+    """,
+    sha256 = "89cb659498c0d196fc9f957f8b849b2e1a5c041c3b2b3ae5432ac5c26944297e",
+    url = "https://github.com/ethereum/EIPs/archive/5480440fe51742ed23342b68cf106cefd427e39d.tar.gz",
+)
+
+consensus_spec_version = "v1.3.0-rc.5"

 bls_test_version = "v0.1.1"

@@ -207,7 +221,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    sha256 = "c56ea4e8fb2fea4b0b23d2191a87bc7e676738dd8a623b44ac847bfeaae5fe64",
+    sha256 = "266006512e71e62396e8f31be01639560c9d59a93c38220fd8f51fabefc8f5f3",
    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/general.tar.gz" % consensus_spec_version,
 )

@@ -223,7 +237,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    sha256 = "c97730b372b81e9ee698c4f09eafaec3fb4be177fab323b32e5ef78d0873fb5c",
+    sha256 = "2ebf483830165909cb7961562fd369dedf079997a4832cc215a543898a73aa46",
    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/minimal.tar.gz" % consensus_spec_version,
 )

@@ -239,7 +253,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    sha256 = "bdd8255c8a536fa83366144aa32fcc3df92a4997401f88f7cda934d13e90d11c",
+    sha256 = "333718ba5c907e0a99580caa8d28dd710543b3b271e4251581006d0e101fbce9",
    url = "https://github.com/ethereum/consensus-spec-tests/releases/download/%s/mainnet.tar.gz" % consensus_spec_version,
 )

@@ -254,7 +268,7 @@ filegroup(
    visibility = ["//visibility:public"],
 )
    """,
-    sha256 = "f6539e19b8e4e45f45b80da39c87dfe7c61d9d7cb51fa7a3a36bdaca11a89693",
+    sha256 = "78b6925b5a4208e32385fa4387d2c27b381a8ddd18d66d5a7787e7846b86bfc8",
    strip_prefix = "consensus-specs-" + consensus_spec_version[1:],
    url = "https://github.com/ethereum/consensus-specs/archive/refs/tags/%s.tar.gz" % consensus_spec_version,
 )
--- a/api/client/beacon/BUILD.bazel
+++ b/api/client/beacon/BUILD.bazel
@@ -8,7 +8,7 @@ go_library(
        "doc.go",
        "errors.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/api/client/beacon",
+    importpath = "github.com/prysmaticlabs/prysm/v4/api/client/beacon",
    visibility = ["//visibility:public"],
    deps = [
        "//beacon-chain/core/helpers:go_default_library",
@@ -20,6 +20,7 @@ go_library(
        "//encoding/ssz/detect:go_default_library",
        "//io/file:go_default_library",
        "//network/forks:go_default_library",
+        "//proto/eth/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "//runtime/version:go_default_library",
        "//time/slots:go_default_library",
--- a/api/client/beacon/checkpoint.go
+++ b/api/client/beacon/checkpoint.go
@@ -6,14 +6,14 @@ import (
 	"path"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/ssz/detect"
-	"github.com/prysmaticlabs/prysm/v3/io/file"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/ssz/detect"
+	"github.com/prysmaticlabs/prysm/v4/io/file"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	log "github.com/sirupsen/logrus"
 	"golang.org/x/mod/semver"
 )
@@ -103,8 +103,8 @@ func DownloadFinalizedData(ctx context.Context, client *Client) (*OriginData, er
 	}

 	log.Printf("BeaconState slot=%d, Block slot=%d", s.Slot(), b.Block().Slot())
-	log.Printf("BeaconState htr=%#xd, Block state_root=%#x", sr, b.Block().StateRoot())
-	log.Printf("BeaconState latest_block_header htr=%#xd, block htr=%#x", br, realBlockRoot)
+	log.Printf("BeaconState htr=%#x, Block state_root=%#x", sr, b.Block().StateRoot())
+	log.Printf("BeaconState latest_block_header htr=%#x, block htr=%#x", br, realBlockRoot)
 	return &OriginData{
 		st: s,
 		b:  b,
--- a/api/client/beacon/checkpoint_test.go
+++ b/api/client/beacon/checkpoint_test.go
@@ -10,21 +10,21 @@ import (
 	"net/url"
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	blocktest "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks/testing"
-	"github.com/prysmaticlabs/prysm/v3/network/forks"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	blocktest "github.com/prysmaticlabs/prysm/v4/consensus-types/blocks/testing"
+	"github.com/prysmaticlabs/prysm/v4/network/forks"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"

-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/ssz/detect"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/ssz/detect"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 type testRT struct {
@@ -398,11 +398,7 @@ func populateValidators(cfg *params.BeaconChainConfig, st state.BeaconState, val
 	if err := st.SetValidators(validators); err != nil {
 		return err
 	}
-	if err := st.SetBalances(balances); err != nil {
-		return err
-	}
-
-	return nil
+	return st.SetBalances(balances)
 }

 func TestDownloadFinalizedData(t *testing.T) {
--- a/api/client/beacon/client.go
+++ b/api/client/beacon/client.go
@@ -16,14 +16,15 @@ import (
 	"text/template"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/network/forks"
+	"github.com/prysmaticlabs/prysm/v4/network/forks"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/eth/v1"

 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/rpc/apimiddleware"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/rpc/apimiddleware"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	log "github.com/sirupsen/logrus"
 )

@@ -33,6 +34,7 @@ const (
 	getForkForStatePath      = "/eth/v1/beacon/states/{{.Id}}/fork"
 	getWeakSubjectivityPath  = "/eth/v1/beacon/weak_subjectivity"
 	getForkSchedulePath      = "/eth/v1/config/fork_schedule"
+	getConfigSpecPath        = "/eth/v1/config/spec"
 	getStatePath             = "/eth/v2/debug/beacon/states"
 	getNodeVersionPath       = "/eth/v1/node/version"
 	changeBLStoExecutionPath = "/eth/v1/beacon/pool/bls_to_execution_changes"
@@ -252,6 +254,20 @@ func (c *Client) GetForkSchedule(ctx context.Context) (forks.OrderedSchedule, er
 	return ofs, nil
 }

+// GetConfigSpec retrieve the current configs of the network used by the beacon node.
+func (c *Client) GetConfigSpec(ctx context.Context) (*v1.SpecResponse, error) {
+	body, err := c.get(ctx, getConfigSpecPath)
+	if err != nil {
+		return nil, errors.Wrap(err, "error requesting configSpecPath")
+	}
+	fsr := &v1.SpecResponse{}
+	err = json.Unmarshal(body, fsr)
+	if err != nil {
+		return nil, err
+	}
+	return fsr, nil
+}
+
 type NodeVersion struct {
 	implementation string
 	semver         string
--- a/api/client/beacon/client_test.go
+++ b/api/client/beacon/client_test.go
@@ -4,7 +4,7 @@ import (
 	"net/url"
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func TestParseNodeVersion(t *testing.T) {
--- a/api/client/builder/BUILD.bazel
+++ b/api/client/builder/BUILD.bazel
@@ -8,7 +8,7 @@ go_library(
        "errors.go",
        "types.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/api/client/builder",
+    importpath = "github.com/prysmaticlabs/prysm/v4/api/client/builder",
    visibility = ["//visibility:public"],
    deps = [
        "//consensus-types/blocks:go_default_library",
--- a/api/client/builder/bid.go
+++ b/api/client/builder/bid.go
@@ -4,11 +4,11 @@ import (
 	"math/big"

 	ssz "github.com/prysmaticlabs/fastssz"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
 )

 // SignedBid is an interface describing the method set of a signed builder bid.
--- a/api/client/builder/client.go
+++ b/api/client/builder/client.go
@@ -15,14 +15,14 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/monitoring/tracing"
-	"github.com/prysmaticlabs/prysm/v3/network"
-	"github.com/prysmaticlabs/prysm/v3/network/authorization"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/monitoring/tracing"
+	"github.com/prysmaticlabs/prysm/v4/network"
+	"github.com/prysmaticlabs/prysm/v4/network/authorization"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
 	log "github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 )
--- a/api/client/builder/client_test.go
+++ b/api/client/builder/client_test.go
@@ -13,14 +13,14 @@ import (
 	"testing"

 	"github.com/prysmaticlabs/go-bitfield"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	v1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	eth "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	types "github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	eth "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 type roundtrip func(*http.Request) (*http.Response, error)
--- a/api/client/builder/testing/BUILD.bazel
+++ b/api/client/builder/testing/BUILD.bazel
@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library")
 go_library(
    name = "go_default_library",
    srcs = ["mock.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v3/api/client/builder/testing",
+    importpath = "github.com/prysmaticlabs/prysm/v4/api/client/builder/testing",
    visibility = ["//visibility:public"],
    deps = [
        "//api/client/builder:go_default_library",
--- a/api/client/builder/testing/mock.go
+++ b/api/client/builder/testing/mock.go
@@ -3,11 +3,11 @@ package testing
 import (
 	"context"

-	"github.com/prysmaticlabs/prysm/v3/api/client/builder"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/api/client/builder"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 )

 // MockClient is a mock implementation of BuilderClient.
--- a/api/client/builder/types.go
+++ b/api/client/builder/types.go
@@ -8,10 +8,10 @@ import (

 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/pkg/errors"
-	types "github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	v1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	eth "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	types "github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	eth "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 )

 type SignedValidatorRegistration struct {
--- a/api/client/builder/types_test.go
+++ b/api/client/builder/types_test.go
@@ -14,10 +14,10 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/golang/protobuf/proto"
 	"github.com/prysmaticlabs/go-bitfield"
-	v1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	eth "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	eth "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func ezDecode(t *testing.T, s string) []byte {
--- a/api/gateway/BUILD.bazel
+++ b/api/gateway/BUILD.bazel
@@ -8,7 +8,7 @@ go_library(
        "modifiers.go",
        "options.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/api/gateway",
+    importpath = "github.com/prysmaticlabs/prysm/v4/api/gateway",
    visibility = [
        "//beacon-chain:__subpackages__",
        "//validator:__subpackages__",
--- a/api/gateway/apimiddleware/BUILD.bazel
+++ b/api/gateway/apimiddleware/BUILD.bazel
@@ -10,7 +10,7 @@ go_library(
        "process_request.go",
        "structs.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/api/gateway/apimiddleware",
+    importpath = "github.com/prysmaticlabs/prysm/v4/api/gateway/apimiddleware",
    visibility = ["//visibility:public"],
    deps = [
        "//api/grpc:go_default_library",
--- a/api/gateway/apimiddleware/param_handling.go
+++ b/api/gateway/apimiddleware/param_handling.go
@@ -7,7 +7,7 @@ import (
 	"strings"

 	"github.com/gorilla/mux"
-	butil "github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
+	butil "github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
 	"github.com/wealdtech/go-bytesutil"
 )

--- a/api/gateway/apimiddleware/param_handling_test.go
+++ b/api/gateway/apimiddleware/param_handling_test.go
@@ -6,8 +6,8 @@ import (
 	"testing"

 	"github.com/gorilla/mux"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func TestHandleURLParameters(t *testing.T) {
--- a/api/gateway/apimiddleware/process_request.go
+++ b/api/gateway/apimiddleware/process_request.go
@@ -10,7 +10,7 @@ import (
 	"strings"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/api/grpc"
+	"github.com/prysmaticlabs/prysm/v4/api/grpc"
 )

 // DeserializeRequestBodyIntoContainer deserializes the request's body into an endpoint-specific struct.
--- a/api/gateway/apimiddleware/process_request_test.go
+++ b/api/gateway/apimiddleware/process_request_test.go
@@ -8,9 +8,9 @@ import (
 	"strings"
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/api/grpc"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/api/grpc"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 	"github.com/sirupsen/logrus/hooks/test"
 )

--- a/api/gateway/gateway.go
+++ b/api/gateway/gateway.go
@@ -13,8 +13,8 @@ import (
 	"github.com/gorilla/mux"
 	gwruntime "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/api/gateway/apimiddleware"
-	"github.com/prysmaticlabs/prysm/v3/runtime"
+	"github.com/prysmaticlabs/prysm/v4/api/gateway/apimiddleware"
+	"github.com/prysmaticlabs/prysm/v4/runtime"
 	"github.com/rs/cors"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/connectivity"
--- a/api/gateway/gateway_test.go
+++ b/api/gateway/gateway_test.go
@@ -10,10 +10,10 @@ import (
 	"testing"

 	"github.com/gorilla/mux"
-	"github.com/prysmaticlabs/prysm/v3/api/gateway/apimiddleware"
-	"github.com/prysmaticlabs/prysm/v3/cmd/beacon-chain/flags"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/api/gateway/apimiddleware"
+	"github.com/prysmaticlabs/prysm/v4/cmd/beacon-chain/flags"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"github.com/urfave/cli/v2"
 )
--- a/api/gateway/options.go
+++ b/api/gateway/options.go
@@ -5,7 +5,7 @@ import (

 	"github.com/gorilla/mux"
 	gwruntime "github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
-	"github.com/prysmaticlabs/prysm/v3/api/gateway/apimiddleware"
+	"github.com/prysmaticlabs/prysm/v4/api/gateway/apimiddleware"
 )

 type Option func(g *Gateway) error
--- a/api/grpc/BUILD.bazel
+++ b/api/grpc/BUILD.bazel
@@ -6,7 +6,7 @@ go_library(
        "grpcutils.go",
        "parameters.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/api/grpc",
+    importpath = "github.com/prysmaticlabs/prysm/v4/api/grpc",
    visibility = ["//visibility:public"],
    deps = [
        "@com_github_sirupsen_logrus//:go_default_library",
--- a/api/grpc/grpcutils_test.go
+++ b/api/grpc/grpcutils_test.go
@@ -7,8 +7,8 @@ import (
 	"testing"

 	"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
--- a/api/pagination/BUILD.bazel
+++ b/api/pagination/BUILD.bazel
@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
    name = "go_default_library",
    srcs = ["pagination.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v3/api/pagination",
+    importpath = "github.com/prysmaticlabs/prysm/v4/api/pagination",
    visibility = ["//visibility:public"],
    deps = [
        "//config/params:go_default_library",
--- a/api/pagination/pagination.go
+++ b/api/pagination/pagination.go
@@ -6,7 +6,7 @@ import (
 	"strconv"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
 )

 // StartAndEndPage takes in the requested page token, wanted page size, total page size.
--- a/api/pagination/pagination_test.go
+++ b/api/pagination/pagination_test.go
@@ -3,9 +3,9 @@ package pagination_test
 import (
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/api/pagination"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/api/pagination"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func TestStartAndEndPage(t *testing.T) {
--- a/async/BUILD.bazel
+++ b/async/BUILD.bazel
@@ -8,7 +8,7 @@ go_library(
        "multilock.go",
        "scatter.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/async",
+    importpath = "github.com/prysmaticlabs/prysm/v4/async",
    visibility = ["//visibility:public"],
    deps = ["@com_github_sirupsen_logrus//:go_default_library"],
 )
--- a/async/abool/BUILD.bazel
+++ b/async/abool/BUILD.bazel
@@ -3,7 +3,7 @@ load("@prysm//tools/go:def.bzl", "go_library", "go_test")
 go_library(
    name = "go_default_library",
    srcs = ["abool.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v3/async/abool",
+    importpath = "github.com/prysmaticlabs/prysm/v4/async/abool",
    visibility = ["//visibility:public"],
 )

--- a/async/benchmark_test.go
+++ b/async/benchmark_test.go
@@ -6,8 +6,8 @@ import (
 	"sync"
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/async"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/async"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 	log "github.com/sirupsen/logrus"
 )

--- a/async/debounce_test.go
+++ b/async/debounce_test.go
@@ -7,10 +7,10 @@ import (
 	"testing"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/async"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/async"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 )

 func TestDebounce_NoEvents(t *testing.T) {
--- a/async/event/BUILD.bazel
+++ b/async/event/BUILD.bazel
@@ -6,7 +6,7 @@ go_library(
        "feed.go",
        "subscription.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/async/event",
+    importpath = "github.com/prysmaticlabs/prysm/v4/async/event",
    visibility = ["//visibility:public"],
    deps = ["//time/mclock:go_default_library"],
 )
--- a/async/event/example_feed_test.go
+++ b/async/event/example_feed_test.go
@@ -19,7 +19,7 @@ package event_test
 import (
 	"fmt"

-	"github.com/prysmaticlabs/prysm/v3/async/event"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
 )

 func ExampleFeed_acknowledgedEvents() {
--- a/async/event/example_scope_test.go
+++ b/async/event/example_scope_test.go
@@ -20,7 +20,7 @@ import (
 	"fmt"
 	"sync"

-	"github.com/prysmaticlabs/prysm/v3/async/event"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
 )

 // This example demonstrates how SubscriptionScope can be used to control the lifetime of
--- a/async/event/example_subscription_test.go
+++ b/async/event/example_subscription_test.go
@@ -19,7 +19,7 @@ package event_test
 import (
 	"fmt"

-	"github.com/prysmaticlabs/prysm/v3/async/event"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
 )

 func ExampleNewSubscription() {
--- a/async/event/feed_test.go
+++ b/async/event/feed_test.go
@@ -23,7 +23,7 @@ import (
 	"testing"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
 )

 func TestFeedPanics(t *testing.T) {
--- a/async/event/subscription.go
+++ b/async/event/subscription.go
@@ -21,7 +21,7 @@ import (
 	"sync"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/time/mclock"
+	"github.com/prysmaticlabs/prysm/v4/time/mclock"
 )

 // waitQuotient is divided against the max backoff time, in order to have N requests based on the full
--- a/async/event/subscription_test.go
+++ b/async/event/subscription_test.go
@@ -23,7 +23,7 @@ import (
 	"testing"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 var errInts = errors.New("error in subscribeInts")
--- a/async/every_test.go
+++ b/async/every_test.go
@@ -6,7 +6,7 @@ import (
 	"testing"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/async"
+	"github.com/prysmaticlabs/prysm/v4/async"
 )

 func TestEveryRuns(t *testing.T) {
--- a/async/scatter_test.go
+++ b/async/scatter_test.go
@@ -5,9 +5,9 @@ import (
 	"sync"
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/async"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/async"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func TestDouble(t *testing.T) {
--- a/beacon-chain/blockchain/BUILD.bazel
+++ b/beacon-chain/blockchain/BUILD.bazel
@@ -4,6 +4,7 @@ go_library(
    name = "go_default_library",
    srcs = [
        "chain_info.go",
+        "chain_info_forkchoice.go",
        "error.go",
        "execution_engine.go",
        "forkchoice_update_execution.go",
@@ -24,7 +25,7 @@ go_library(
        "service.go",
        "weak_subjectivity_checks.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain",
+    importpath = "github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain",
    visibility = [
        "//beacon-chain:__subpackages__",
        "//cmd/beacon-chain:__subpackages__",
--- a/beacon-chain/blockchain/chain_info.go
+++ b/beacon-chain/blockchain/chain_info.go
@@ -6,17 +6,17 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpbv1 "github.com/prysmaticlabs/prysm/v4/proto/eth/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"go.opencensus.io/trace"
 )

@@ -28,12 +28,25 @@ type ChainInfoFetcher interface {
 	CanonicalFetcher
 	ForkFetcher
 	HeadDomainFetcher
+	ForkchoiceFetcher
 }

-// HeadUpdater defines a common interface for methods in blockchain service
-// which allow to update the head info
-type HeadUpdater interface {
-	UpdateHead(context.Context) error
+// ForkchoiceFetcher defines a common interface for methods that access directly
+// forkchoice information. These typically require a lock and external callers
+// are requested to call methods within this blockchain package that takes care
+// of locking forkchoice
+type ForkchoiceFetcher interface {
+	Ancestor(context.Context, []byte, primitives.Slot) ([]byte, error)
+	CachedHeadRoot() [32]byte
+	GetProposerHead() [32]byte
+	SetForkChoiceGenesisTime(uint64)
+	UpdateHead(context.Context, primitives.Slot)
+	HighestReceivedBlockSlot() primitives.Slot
+	ReceivedBlocksLastEpoch() (uint64, error)
+	InsertNode(context.Context, state.BeaconState, [32]byte) error
+	ForkChoiceDump(context.Context) (*ethpbv1.ForkChoiceDump, error)
+	NewSlot(context.Context, primitives.Slot) error
+	ProposerBoost() [32]byte
 }

 // TimeFetcher retrieves the Ethereum consensus data that's related to time.
@@ -67,7 +80,6 @@ type HeadFetcher interface {

 // ForkFetcher retrieves the current fork information of the Ethereum beacon chain.
 type ForkFetcher interface {
-	ForkChoicer() forkchoice.ForkChoicer
 	CurrentFork() *ethpb.Fork
 	GenesisFetcher
 	TimeFetcher
@@ -96,33 +108,25 @@ type OptimisticModeFetcher interface {

 // FinalizedCheckpt returns the latest finalized checkpoint from chain store.
 func (s *Service) FinalizedCheckpt() *ethpb.Checkpoint {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
-	cp := s.ForkChoicer().FinalizedCheckpoint()
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	cp := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 	return &ethpb.Checkpoint{Epoch: cp.Epoch, Root: bytesutil.SafeCopyBytes(cp.Root[:])}
 }

 // PreviousJustifiedCheckpt returns the current justified checkpoint from chain store.
 func (s *Service) PreviousJustifiedCheckpt() *ethpb.Checkpoint {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
-	cp := s.ForkChoicer().PreviousJustifiedCheckpoint()
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	cp := s.cfg.ForkChoiceStore.PreviousJustifiedCheckpoint()
 	return &ethpb.Checkpoint{Epoch: cp.Epoch, Root: bytesutil.SafeCopyBytes(cp.Root[:])}
 }

 // CurrentJustifiedCheckpt returns the current justified checkpoint from chain store.
 func (s *Service) CurrentJustifiedCheckpt() *ethpb.Checkpoint {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
-	cp := s.ForkChoicer().JustifiedCheckpoint()
-	return &ethpb.Checkpoint{Epoch: cp.Epoch, Root: bytesutil.SafeCopyBytes(cp.Root[:])}
-}
-
-// BestJustifiedCheckpt returns the best justified checkpoint from store.
-func (s *Service) BestJustifiedCheckpt() *ethpb.Checkpoint {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
-	cp := s.ForkChoicer().BestJustifiedCheckpoint()
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	cp := s.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	return &ethpb.Checkpoint{Epoch: cp.Epoch, Root: bytesutil.SafeCopyBytes(cp.Root[:])}
 }

@@ -285,8 +289,8 @@ func (s *Service) CurrentFork() *ethpb.Fork {

 // IsCanonical returns true if the input block root is part of the canonical chain.
 func (s *Service) IsCanonical(ctx context.Context, blockRoot [32]byte) (bool, error) {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
 	// If the block has not been finalized, check fork choice store to see if the block is canonical
 	if s.cfg.ForkChoiceStore.HasNode(blockRoot) {
 		return s.cfg.ForkChoiceStore.IsCanonical(blockRoot), nil
@@ -296,14 +300,6 @@ func (s *Service) IsCanonical(ctx context.Context, blockRoot [32]byte) (bool, er
 	return s.cfg.BeaconDB.IsFinalizedBlock(ctx, blockRoot), nil
 }

-// ChainHeads returns all possible chain heads (leaves of fork choice tree).
-// Heads roots and heads slots are returned.
-func (s *Service) ChainHeads() ([][32]byte, []primitives.Slot) {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
-	return s.cfg.ForkChoiceStore.Tips()
-}
-
 // HeadPublicKeyToValidatorIndex returns the validator index of the `pubkey` in current head state.
 func (s *Service) HeadPublicKeyToValidatorIndex(pubKey [fieldparams.BLSPubkeyLength]byte) (primitives.ValidatorIndex, bool) {
 	s.headLock.RLock()
@@ -328,11 +324,6 @@ func (s *Service) HeadValidatorIndexToPublicKey(_ context.Context, index primiti
 	return v.PublicKey(), nil
 }

-// ForkChoicer returns the forkchoice interface.
-func (s *Service) ForkChoicer() forkchoice.ForkChoicer {
-	return s.cfg.ForkChoiceStore
-}
-
 // IsOptimistic returns true if the current head is optimistic.
 func (s *Service) IsOptimistic(ctx context.Context) (bool, error) {
 	if slots.ToEpoch(s.CurrentSlot()) < params.BeaconConfig().BellatrixForkEpoch {
@@ -342,8 +333,8 @@ func (s *Service) IsOptimistic(ctx context.Context) (bool, error) {
 	headRoot := s.head.root
 	s.headLock.RUnlock()

-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
 	optimistic, err := s.cfg.ForkChoiceStore.IsOptimistic(headRoot)
 	if err == nil {
 		return optimistic, nil
@@ -359,14 +350,14 @@ func (s *Service) IsOptimistic(ctx context.Context) (bool, error) {
 // IsFinalized returns true if the input root is finalized.
 // It first checks latest finalized root then checks finalized root index in DB.
 func (s *Service) IsFinalized(ctx context.Context, root [32]byte) bool {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
-	if s.ForkChoicer().FinalizedCheckpoint().Root == root {
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	if s.cfg.ForkChoiceStore.FinalizedCheckpoint().Root == root {
 		return true
 	}
 	// If node exists in our store, then it is not
 	// finalized.
-	if s.ForkChoicer().HasNode(root) {
+	if s.cfg.ForkChoiceStore.HasNode(root) {
 		return false
 	}
 	return s.cfg.BeaconDB.IsFinalizedBlock(ctx, root)
@@ -376,17 +367,17 @@ func (s *Service) IsFinalized(ctx context.Context, root [32]byte) bool {
 // This in particular means that the blockroot is a descendant of the
 // finalized checkpoint
 func (s *Service) InForkchoice(root [32]byte) bool {
-	s.ForkChoicer().RLock()
-	defer s.ForkChoicer().RUnlock()
-	return s.ForkChoicer().HasNode(root)
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	return s.cfg.ForkChoiceStore.HasNode(root)
 }

 // 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) {
-	s.ForkChoicer().RLock()
+	s.cfg.ForkChoiceStore.RLock()
 	optimistic, err := s.cfg.ForkChoiceStore.IsOptimistic(root)
-	s.ForkChoicer().RUnlock()
+	s.cfg.ForkChoiceStore.RUnlock()
 	if err == nil {
 		return optimistic, nil
 	}
@@ -444,12 +435,42 @@ func (s *Service) IsOptimisticForRoot(ctx context.Context, root [32]byte) (bool,
 	return !isCanonical, nil
 }

+// Ancestor returns the block root of an ancestry block from the input block root.
+//
+// Spec pseudocode definition:
+//
+//	def get_ancestor(store: Store, root: Root, slot: Slot) -> Root:
+//	 block = store.blocks[root]
+//	 if block.slot > slot:
+//	     return get_ancestor(store, block.parent_root, slot)
+//	 elif block.slot == slot:
+//	     return root
+//	 else:
+//	     # root is older than queried slot, thus a skip slot. Return most recent root prior to slot
+//	     return root
+func (s *Service) Ancestor(ctx context.Context, root []byte, slot primitives.Slot) ([]byte, error) {
+	ctx, span := trace.StartSpan(ctx, "blockChain.ancestor")
+	defer span.End()
+
+	r := bytesutil.ToBytes32(root)
+	// Get ancestor root from fork choice store instead of recursively looking up blocks in DB.
+	// This is most optimal outcome.
+	s.cfg.ForkChoiceStore.RLock()
+	ar, err := s.cfg.ForkChoiceStore.AncestorRoot(ctx, r, slot)
+	s.cfg.ForkChoiceStore.RUnlock()
+	if err != nil {
+		// Try getting ancestor root from DB when failed to retrieve from fork choice store.
+		// This is the second line of defense for retrieving ancestor root.
+		ar, err = s.ancestorByDB(ctx, r, slot)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	return ar[:], nil
+}
+
 // SetGenesisTime sets the genesis time of beacon chain.
 func (s *Service) SetGenesisTime(t time.Time) {
 	s.genesisTime = t
 }
-
-// ForkChoiceStore returns the fork choice store in the service.
-func (s *Service) ForkChoiceStore() forkchoice.ForkChoicer {
-	return s.cfg.ForkChoiceStore
-}
--- a/beacon-chain/blockchain/chain_info_forkchoice.go
+++ b/beacon-chain/blockchain/chain_info_forkchoice.go
@@ -0,0 +1,80 @@
+package blockchain
+
+import (
+	"context"
+
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	ethpbv1 "github.com/prysmaticlabs/prysm/v4/proto/eth/v1"
+)
+
+// CachedHeadRoot returns the corresponding value from Forkchoice
+func (s *Service) CachedHeadRoot() [32]byte {
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	return s.cfg.ForkChoiceStore.CachedHeadRoot()
+}
+
+// GetProposerHead returns the corresponding value from forkchoice
+func (s *Service) GetProposerHead() [32]byte {
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	return s.cfg.ForkChoiceStore.GetProposerHead()
+}
+
+// SetForkChoiceGenesisTime sets the genesis time in Forkchoice
+func (s *Service) SetForkChoiceGenesisTime(timestamp uint64) {
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
+	s.cfg.ForkChoiceStore.SetGenesisTime(timestamp)
+}
+
+// HighestReceivedBlockSlot returns the corresponding value from forkchoice
+func (s *Service) HighestReceivedBlockSlot() primitives.Slot {
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	return s.cfg.ForkChoiceStore.HighestReceivedBlockSlot()
+}
+
+// ReceivedBlocksLastEpoch returns the corresponding value from forkchoice
+func (s *Service) ReceivedBlocksLastEpoch() (uint64, error) {
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	return s.cfg.ForkChoiceStore.ReceivedBlocksLastEpoch()
+}
+
+// InsertNode is a wrapper for node insertion which is self locked
+func (s *Service) InsertNode(ctx context.Context, st state.BeaconState, root [32]byte) error {
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
+	return s.cfg.ForkChoiceStore.InsertNode(ctx, st, root)
+}
+
+// ForkChoiceDump returns the corresponding value from forkchoice
+func (s *Service) ForkChoiceDump(ctx context.Context) (*ethpbv1.ForkChoiceDump, error) {
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	return s.cfg.ForkChoiceStore.ForkChoiceDump(ctx)
+}
+
+// NewSlot returns the corresponding value from forkchoice
+func (s *Service) NewSlot(ctx context.Context, slot primitives.Slot) error {
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
+	return s.cfg.ForkChoiceStore.NewSlot(ctx, slot)
+}
+
+// ProposerBoost wraps the corresponding method from forkchoice
+func (s *Service) ProposerBoost() [32]byte {
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
+	return s.cfg.ForkChoiceStore.ProposerBoost()
+}
+
+// ChainHeads returns all possible chain heads (leaves of fork choice tree).
+// Heads roots and heads slots are returned.
+func (s *Service) ChainHeads() ([][32]byte, []primitives.Slot) {
+	s.cfg.ForkChoiceStore.RLock()
+	defer s.cfg.ForkChoiceStore.RUnlock()
+	return s.cfg.ForkChoiceStore.Tips()
+}
--- a/beacon-chain/blockchain/chain_info_norace_test.go
+++ b/beacon-chain/blockchain/chain_info_norace_test.go
@@ -4,14 +4,14 @@ import (
 	"context"
 	"testing"

-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 )

 func TestHeadSlot_DataRace(t *testing.T) {
--- a/beacon-chain/blockchain/chain_info_test.go
+++ b/beacon-chain/blockchain/chain_info_test.go
@@ -5,22 +5,22 @@ import (
 	"testing"
 	"time"

-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	state_native "github.com/prysmaticlabs/prysm/v4/beacon-chain/state/state-native"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 	"google.golang.org/protobuf/proto"
 )

@@ -71,12 +71,6 @@ func TestHeadRoot_Nil(t *testing.T) {
 	assert.DeepEqual(t, params.BeaconConfig().ZeroHash[:], headRoot, "Incorrect pre chain start value")
 }

-func TestService_ForkChoiceStore(t *testing.T) {
-	c := &Service{cfg: &config{ForkChoiceStore: doublylinkedtree.New()}}
-	p := c.ForkChoiceStore()
-	require.Equal(t, primitives.Epoch(0), p.FinalizedCheckpoint().Epoch)
-}
-
 func TestFinalizedCheckpt_GenesisRootOk(t *testing.T) {
 	ctx := context.Background()
 	beaconDB := testDB.SetupDB(t)
@@ -559,7 +553,7 @@ func TestService_IsFinalized(t *testing.T) {
 	ctx := context.Background()
 	c := &Service{cfg: &config{BeaconDB: beaconDB, ForkChoiceStore: doublylinkedtree.New()}}
 	r1 := [32]byte{'a'}
-	require.NoError(t, c.ForkChoiceStore().UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{
+	require.NoError(t, c.cfg.ForkChoiceStore.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{
 		Root: r1,
 	}))
 	b := util.NewBeaconBlock()
--- a/beacon-chain/blockchain/error_test.go
+++ b/beacon-chain/blockchain/error_test.go
@@ -4,7 +4,7 @@ import (
 	"testing"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func TestIsInvalidBlock(t *testing.T) {
--- a/beacon-chain/blockchain/execution_engine.go
+++ b/beacon-chain/blockchain/execution_engine.go
@@ -5,22 +5,22 @@ import (
 	"fmt"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db/kv"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/execution"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	payloadattribute "github.com/prysmaticlabs/prysm/v3/consensus-types/payload-attribute"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/blocks"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/time"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db/kv"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/execution"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	consensusblocks "github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	payloadattribute "github.com/prysmaticlabs/prysm/v4/consensus-types/payload-attribute"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 )
@@ -60,8 +60,8 @@ func (s *Service) notifyForkchoiceUpdate(ctx context.Context, arg *notifyForkcho
 		log.WithError(err).Error("Could not get execution payload for head block")
 		return nil, nil
 	}
-	finalizedHash := s.ForkChoicer().FinalizedPayloadBlockHash()
-	justifiedHash := s.ForkChoicer().JustifiedPayloadBlockHash()
+	finalizedHash := s.cfg.ForkChoiceStore.FinalizedPayloadBlockHash()
+	justifiedHash := s.cfg.ForkChoiceStore.JustifiedPayloadBlockHash()
 	fcs := &enginev1.ForkchoiceState{
 		HeadBlockHash:      headPayload.BlockHash(),
 		SafeBlockHash:      justifiedHash[:],
@@ -88,7 +88,7 @@ func (s *Service) notifyForkchoiceUpdate(ctx context.Context, arg *notifyForkcho
 			if len(lastValidHash) == 0 {
 				lastValidHash = defaultLatestValidHash
 			}
-			invalidRoots, err := s.ForkChoicer().SetOptimisticToInvalid(ctx, headRoot, headBlk.ParentRoot(), bytesutil.ToBytes32(lastValidHash))
+			invalidRoots, err := s.cfg.ForkChoiceStore.SetOptimisticToInvalid(ctx, headRoot, headBlk.ParentRoot(), bytesutil.ToBytes32(lastValidHash))
 			if err != nil {
 				log.WithError(err).Error("Could not set head root to invalid")
 				return nil, nil
@@ -224,7 +224,7 @@ func (s *Service) notifyNewPayload(ctx context.Context, postStateVersion int,
 		if err != nil {
 			return false, err
 		}
-		invalidRoots, err := s.ForkChoicer().SetOptimisticToInvalid(ctx, root, blk.Block().ParentRoot(), bytesutil.ToBytes32(lastValidHash))
+		invalidRoots, err := s.cfg.ForkChoiceStore.SetOptimisticToInvalid(ctx, root, blk.Block().ParentRoot(), bytesutil.ToBytes32(lastValidHash))
 		if err != nil {
 			return false, err
 		}
--- a/beacon-chain/blockchain/execution_engine_test.go
+++ b/beacon-chain/blockchain/execution_engine_test.go
@@ -7,27 +7,27 @@ import (

 	"github.com/ethereum/go-ethereum/common"
 	gethtypes "github.com/ethereum/go-ethereum/core/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/execution"
-	mockExecution "github.com/prysmaticlabs/prysm/v3/beacon-chain/execution/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	bstate "github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	v1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/blocks"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/execution"
+	mockExecution "github.com/prysmaticlabs/prysm/v4/beacon-chain/execution/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	bstate "github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	state_native "github.com/prysmaticlabs/prysm/v4/beacon-chain/state/state-native"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	consensusblocks "github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

--- a/beacon-chain/blockchain/forkchoice_update_execution.go
+++ b/beacon-chain/blockchain/forkchoice_update_execution.go
@@ -2,14 +2,22 @@ package blockchain

 import (
 	"context"
+	"fmt"
+	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/features"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
+	"github.com/sirupsen/logrus"
 )

-func (s *Service) isNewProposer() bool {
-	_, _, ok := s.cfg.ProposerSlotIndexCache.GetProposerPayloadIDs(s.CurrentSlot()+1, [32]byte{} /* root */)
+func (s *Service) isNewProposer(slot primitives.Slot) bool {
+	_, _, ok := s.cfg.ProposerSlotIndexCache.GetProposerPayloadIDs(slot, [32]byte{} /* root */)
 	return ok
 }

@@ -40,12 +48,18 @@ func (s *Service) getStateAndBlock(ctx context.Context, r [32]byte) (state.Beaco
 	return headState, newHeadBlock, nil
 }

-func (s *Service) forkchoiceUpdateWithExecution(ctx context.Context, newHeadRoot [32]byte) error {
+// fockchoiceUpdateWithExecution is a wrapper around notifyForkchoiceUpdate. It decides whether a new call to FCU should be made.
+func (s *Service) forkchoiceUpdateWithExecution(ctx context.Context, newHeadRoot [32]byte, proposingSlot primitives.Slot) error {
 	isNewHead := s.isNewHead(newHeadRoot)
-	if !isNewHead && !s.isNewProposer() {
+	if !isNewHead {
 		return nil
 	}
-
+	isNewProposer := s.isNewProposer(proposingSlot)
+	if isNewProposer && !features.Get().DisableReorgLateBlocks {
+		if s.shouldOverrideFCU(newHeadRoot, proposingSlot) {
+			return nil
+		}
+	}
 	headState, headBlock, err := s.getStateAndBlock(ctx, newHeadRoot)
 	if err != nil {
 		log.WithError(err).Error("Could not get forkchoice update argument")
@@ -58,19 +72,56 @@ func (s *Service) forkchoiceUpdateWithExecution(ctx context.Context, newHeadRoot
 		headBlock: headBlock.Block(),
 	})
 	if err != nil {
-		return err
+		return errors.Wrap(err, "could not notify forkchoice update")
 	}

-	if isNewHead {
-		if err := s.saveHead(ctx, newHeadRoot, headBlock, headState); err != nil {
-			log.WithError(err).Error("could not save head")
-		}
-
-		// Only need to prune attestations from pool if the head has changed.
-		if err := s.pruneAttsFromPool(headBlock); err != nil {
-			return err
-		}
+	if err := s.saveHead(ctx, newHeadRoot, headBlock, headState); err != nil {
+		log.WithError(err).Error("could not save head")
 	}

+	// Only need to prune attestations from pool if the head has changed.
+	if err := s.pruneAttsFromPool(headBlock); err != nil {
+		log.WithError(err).Error("could not prune attestations from pool")
+	}
 	return nil
 }
+
+// shouldOverrideFCU checks whether the incoming block is still subject to being
+// reorged or not by the next proposer.
+func (s *Service) shouldOverrideFCU(newHeadRoot [32]byte, proposingSlot primitives.Slot) bool {
+	headWeight, err := s.cfg.ForkChoiceStore.Weight(newHeadRoot)
+	if err != nil {
+		log.WithError(err).WithField("root", fmt.Sprintf("%#x", newHeadRoot)).Warn("could not determine node weight")
+	}
+	currentSlot := s.CurrentSlot()
+	if proposingSlot == currentSlot {
+		proposerHead := s.cfg.ForkChoiceStore.GetProposerHead()
+		if proposerHead != newHeadRoot {
+			return true
+		}
+		log.WithFields(logrus.Fields{
+			"root":   fmt.Sprintf("%#x", newHeadRoot),
+			"weight": headWeight,
+		}).Infof("Attempted late block reorg aborted due to attestations at %d seconds",
+			params.BeaconConfig().SecondsPerSlot)
+		lateBlockFailedAttemptSecondThreshold.Inc()
+	} else {
+		if s.cfg.ForkChoiceStore.ShouldOverrideFCU() {
+			return true
+		}
+		secs, err := slots.SecondsSinceSlotStart(currentSlot,
+			uint64(s.genesisTime.Unix()), uint64(time.Now().Unix()))
+		if err != nil {
+			log.WithError(err).Error("could not compute seconds since slot start")
+		}
+		if secs >= doublylinkedtree.ProcessAttestationsThreshold {
+			log.WithFields(logrus.Fields{
+				"root":   fmt.Sprintf("%#x", newHeadRoot),
+				"weight": headWeight,
+			}).Infof("Attempted late block reorg aborted due to attestations at %d seconds",
+				doublylinkedtree.ProcessAttestationsThreshold)
+			lateBlockFailedAttemptFirstThreshold.Inc()
+		}
+	}
+	return false
+}
--- a/beacon-chain/blockchain/forkchoice_update_execution_test.go
+++ b/beacon-chain/blockchain/forkchoice_update_execution_test.go
@@ -3,28 +3,29 @@ package blockchain
 import (
 	"context"
 	"testing"
+	"time"

-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	mockExecution "github.com/prysmaticlabs/prysm/v3/beacon-chain/execution/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	mockExecution "github.com/prysmaticlabs/prysm/v4/beacon-chain/execution/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

 func TestService_isNewProposer(t *testing.T) {
 	beaconDB := testDB.SetupDB(t)
 	service := setupBeaconChain(t, beaconDB)
-	require.Equal(t, false, service.isNewProposer())
+	require.Equal(t, false, service.isNewProposer(service.CurrentSlot()+1))

 	service.cfg.ProposerSlotIndexCache.SetProposerAndPayloadIDs(service.CurrentSlot()+1, 0, [8]byte{}, [32]byte{} /* root */)
-	require.Equal(t, true, service.isNewProposer())
+	require.Equal(t, true, service.isNewProposer(service.CurrentSlot()+1))
 }

 func TestService_isNewHead(t *testing.T) {
@@ -75,7 +76,7 @@ func TestService_forkchoiceUpdateWithExecution_exceptionalCases(t *testing.T) {
 	service, err := NewService(ctx, opts...)
 	require.NoError(t, err)
 	service.cfg.ProposerSlotIndexCache = cache.NewProposerPayloadIDsCache()
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, service.headRoot()))
+	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, service.headRoot(), service.CurrentSlot()+1))
 	hookErr := "could not notify forkchoice update"
 	invalidStateErr := "could not get state summary: could not find block in DB"
 	require.LogsDoNotContain(t, hook, invalidStateErr)
@@ -83,7 +84,7 @@ func TestService_forkchoiceUpdateWithExecution_exceptionalCases(t *testing.T) {
 	gb, err := blocks.NewSignedBeaconBlock(util.NewBeaconBlock())
 	require.NoError(t, err)
 	require.NoError(t, service.saveInitSyncBlock(ctx, [32]byte{'a'}, gb))
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, [32]byte{'a'}))
+	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, [32]byte{'a'}, service.CurrentSlot()+1))
 	require.LogsContain(t, hook, invalidStateErr)

 	hook.Reset()
@@ -107,7 +108,7 @@ func TestService_forkchoiceUpdateWithExecution_exceptionalCases(t *testing.T) {
 		state: st,
 	}
 	service.cfg.ProposerSlotIndexCache.SetProposerAndPayloadIDs(2, 1, [8]byte{1}, [32]byte{2})
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, r1))
+	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, r1, service.CurrentSlot()))
 	require.LogsDoNotContain(t, hook, invalidStateErr)
 	require.LogsDoNotContain(t, hook, hookErr)

@@ -124,7 +125,7 @@ func TestService_forkchoiceUpdateWithExecution_exceptionalCases(t *testing.T) {
 		state: st,
 	}
 	service.cfg.ProposerSlotIndexCache.SetProposerAndPayloadIDs(2, 1, [8]byte{1}, [32]byte{2})
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, r1))
+	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, r1, service.CurrentSlot()+1))
 	require.LogsDoNotContain(t, hook, invalidStateErr)
 	require.LogsDoNotContain(t, hook, hookErr)
 	vId, payloadID, has := service.cfg.ProposerSlotIndexCache.GetProposerPayloadIDs(2, [32]byte{2})
@@ -134,7 +135,7 @@ func TestService_forkchoiceUpdateWithExecution_exceptionalCases(t *testing.T) {

 	// Test zero headRoot returns immediately.
 	headRoot := service.headRoot()
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, [32]byte{}))
+	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, [32]byte{}, service.CurrentSlot()+1))
 	require.Equal(t, service.headRoot(), headRoot)
 }

@@ -184,7 +185,52 @@ func TestService_forkchoiceUpdateWithExecution_SameHeadRootNewProposer(t *testin

 	// Set head to be the same but proposing next slot
 	service.head.root = r
+	service.head.block = sb
+	service.head.state = st
 	service.cfg.ProposerSlotIndexCache.SetProposerAndPayloadIDs(service.CurrentSlot()+1, 0, [8]byte{}, [32]byte{} /* root */)
-	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, r))
+	require.NoError(t, service.forkchoiceUpdateWithExecution(ctx, r, service.CurrentSlot()+1))

 }
+
+func TestShouldOverrideFCU(t *testing.T) {
+	hook := logTest.NewGlobal()
+	ctx := context.Background()
+	beaconDB := testDB.SetupDB(t)
+	fcs := doublylinkedtree.New()
+	opts := []Option{
+		WithDatabase(beaconDB),
+		WithStateGen(stategen.New(beaconDB, fcs)),
+		WithForkChoiceStore(fcs),
+		WithProposerIdsCache(cache.NewProposerPayloadIDsCache()),
+	}
+	service, err := NewService(ctx, opts...)
+	service.SetGenesisTime(time.Now().Add(-time.Duration(2*params.BeaconConfig().SecondsPerSlot) * time.Second))
+	require.NoError(t, err)
+	headRoot := [32]byte{'b'}
+	parentRoot := [32]byte{'a'}
+	ojc := &ethpb.Checkpoint{}
+	st, root, err := prepareForkchoiceState(ctx, 1, parentRoot, [32]byte{}, [32]byte{}, ojc, ojc)
+	require.NoError(t, err)
+	require.NoError(t, fcs.InsertNode(ctx, st, root))
+	st, root, err = prepareForkchoiceState(ctx, 2, headRoot, parentRoot, [32]byte{}, ojc, ojc)
+	require.NoError(t, err)
+	require.NoError(t, fcs.InsertNode(ctx, st, root))
+
+	require.Equal(t, primitives.Slot(2), service.CurrentSlot())
+	require.Equal(t, true, service.shouldOverrideFCU(headRoot, 2))
+	require.LogsDoNotContain(t, hook, "12 seconds")
+	require.Equal(t, false, service.shouldOverrideFCU(parentRoot, 2))
+	require.LogsContain(t, hook, "12 seconds")
+
+	head, err := fcs.Head(ctx)
+	require.NoError(t, err)
+	require.Equal(t, headRoot, head)
+
+	fcs.SetGenesisTime(uint64(time.Now().Unix()) - 29)
+	require.Equal(t, true, service.shouldOverrideFCU(parentRoot, 3))
+	require.LogsDoNotContain(t, hook, "10 seconds")
+	fcs.SetGenesisTime(uint64(time.Now().Unix()) - 24)
+	service.SetGenesisTime(time.Now().Add(-time.Duration(2*params.BeaconConfig().SecondsPerSlot+10) * time.Second))
+	require.Equal(t, false, service.shouldOverrideFCU(parentRoot, 3))
+	require.LogsContain(t, hook, "10 seconds")
+}
--- a/beacon-chain/blockchain/head.go
+++ b/beacon-chain/blockchain/head.go
@@ -6,21 +6,21 @@ import (
 	"fmt"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
-	statefeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v3/math"
-	ethpbv1 "github.com/prysmaticlabs/prysm/v3/proto/eth/v1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed"
+	statefeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v4/math"
+	ethpbv1 "github.com/prysmaticlabs/prysm/v4/proto/eth/v1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 )
@@ -28,6 +28,8 @@ import (
 // UpdateAndSaveHeadWithBalances updates the beacon state head after getting justified balanced from cache.
 // This function is only used in spec-tests, it does save the head after updating it.
 func (s *Service) UpdateAndSaveHeadWithBalances(ctx context.Context) error {
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
 	headRoot, err := s.cfg.ForkChoiceStore.Head(ctx)
 	if err != nil {
 		return errors.Wrap(err, "could not update head")
@@ -94,18 +96,18 @@ func (s *Service) saveHead(ctx context.Context, newHeadRoot [32]byte, headBlock
 	}
 	oldHeadRoot := bytesutil.ToBytes32(r)
 	if headBlock.Block().ParentRoot() != oldHeadRoot {
-		commonRoot, forkSlot, err := s.ForkChoicer().CommonAncestor(ctx, oldHeadRoot, newHeadRoot)
+		commonRoot, forkSlot, err := s.cfg.ForkChoiceStore.CommonAncestor(ctx, oldHeadRoot, newHeadRoot)
 		if err != nil {
 			log.WithError(err).Error("Could not find common ancestor root")
 			commonRoot = params.BeaconConfig().ZeroHash
 		}
 		dis := headSlot + newHeadSlot - 2*forkSlot
 		dep := math.Max(uint64(headSlot-forkSlot), uint64(newHeadSlot-forkSlot))
-		oldWeight, err := s.ForkChoicer().Weight(oldHeadRoot)
+		oldWeight, err := s.cfg.ForkChoiceStore.Weight(oldHeadRoot)
 		if err != nil {
 			log.WithField("root", fmt.Sprintf("%#x", oldHeadRoot)).Warn("could not determine node weight")
 		}
-		newWeight, err := s.ForkChoicer().Weight(newHeadRoot)
+		newWeight, err := s.cfg.ForkChoiceStore.Weight(newHeadRoot)
 		if err != nil {
 			log.WithField("root", fmt.Sprintf("%#x", newHeadRoot)).Warn("could not determine node weight")
 		}
@@ -123,7 +125,7 @@ func (s *Service) saveHead(ctx context.Context, newHeadRoot [32]byte, headBlock
 		reorgDistance.Observe(float64(dis))
 		reorgDepth.Observe(float64(dep))

-		isOptimistic, err := s.ForkChoicer().IsOptimistic(newHeadRoot)
+		isOptimistic, err := s.cfg.ForkChoiceStore.IsOptimistic(newHeadRoot)
 		if err != nil {
 			return errors.Wrap(err, "could not check if node is optimistically synced")
 		}
@@ -363,7 +365,7 @@ func (s *Service) notifyNewHeadEvent(
 // This saves the Attestations and BLSToExecChanges between `orphanedRoot` and the common ancestor root that is derived using `newHeadRoot`.
 // It also filters out the attestations that is one epoch older as a defense so invalid attestations don't flow into the attestation pool.
 func (s *Service) saveOrphanedOperations(ctx context.Context, orphanedRoot [32]byte, newHeadRoot [32]byte) error {
-	commonAncestorRoot, _, err := s.ForkChoicer().CommonAncestor(ctx, newHeadRoot, orphanedRoot)
+	commonAncestorRoot, _, err := s.cfg.ForkChoiceStore.CommonAncestor(ctx, newHeadRoot, orphanedRoot)
 	switch {
 	// Exit early if there's no common ancestor and root doesn't exist, there would be nothing to save.
 	case errors.Is(err, forkchoice.ErrUnknownCommonAncestor):
--- a/beacon-chain/blockchain/head_sync_committee_info.go
+++ b/beacon-chain/blockchain/head_sync_committee_info.go
@@ -5,17 +5,17 @@ import (
 	"fmt"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/async"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/altair"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/async"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/altair"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/signing"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )

 // Initialize the state cache for sync committees.
--- a/beacon-chain/blockchain/head_sync_committee_info_test.go
+++ b/beacon-chain/blockchain/head_sync_committee_info_test.go
@@ -4,13 +4,13 @@ import (
 	"context"
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/signing"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )

 func TestService_HeadSyncCommitteeIndices(t *testing.T) {
--- a/beacon-chain/blockchain/head_test.go
+++ b/beacon-chain/blockchain/head_test.go
@@ -7,23 +7,22 @@ import (
 	"testing"
 	"time"

-	mock "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/config/features"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpbv1 "github.com/prysmaticlabs/prysm/v3/proto/eth/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	mock "github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain/testing"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/blstoexec"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpbv1 "github.com/prysmaticlabs/prysm/v4/proto/eth/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

@@ -309,7 +308,7 @@ func TestSaveOrphanedAtts(t *testing.T) {
 		require.NoError(t, err)
 		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
-		require.NoError(t, service.ForkChoicer().InsertNode(ctx, state, blkRoot))
+		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}

@@ -374,7 +373,7 @@ func TestSaveOrphanedAtts_CanFilter(t *testing.T) {
 		require.NoError(t, err)
 		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
-		require.NoError(t, service.ForkChoicer().InsertNode(ctx, state, blkRoot))
+		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}

@@ -386,11 +385,6 @@ func TestSaveOrphanedAtts_CanFilter(t *testing.T) {
 }

 func TestSaveOrphanedAtts_DoublyLinkedTrie(t *testing.T) {
-	resetCfg := features.InitWithReset(&features.Flags{
-		DisableForkchoiceDoublyLinkedTree: false,
-	})
-	defer resetCfg()
-
 	ctx := context.Background()
 	beaconDB := testDB.SetupDB(t)
 	service := setupBeaconChain(t, beaconDB)
@@ -437,7 +431,7 @@ func TestSaveOrphanedAtts_DoublyLinkedTrie(t *testing.T) {
 		require.NoError(t, err)
 		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
-		require.NoError(t, service.ForkChoicer().InsertNode(ctx, state, blkRoot))
+		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}

@@ -456,11 +450,6 @@ func TestSaveOrphanedAtts_DoublyLinkedTrie(t *testing.T) {
 }

 func TestSaveOrphanedAtts_CanFilter_DoublyLinkedTrie(t *testing.T) {
-	resetCfg := features.InitWithReset(&features.Flags{
-		DisableForkchoiceDoublyLinkedTree: false,
-	})
-	defer resetCfg()
-
 	ctx := context.Background()
 	beaconDB := testDB.SetupDB(t)
 	service := setupBeaconChain(t, beaconDB)
@@ -501,7 +490,7 @@ func TestSaveOrphanedAtts_CanFilter_DoublyLinkedTrie(t *testing.T) {
 		require.NoError(t, err)
 		state, blkRoot, err := prepareForkchoiceState(ctx, blk.Block.Slot, r, bytesutil.ToBytes32(blk.Block.ParentRoot), [32]byte{}, ojc, ofc)
 		require.NoError(t, err)
-		require.NoError(t, service.ForkChoicer().InsertNode(ctx, state, blkRoot))
+		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 		util.SaveBlock(t, ctx, beaconDB, blk)
 	}

--- a/beacon-chain/blockchain/init_sync_process_block.go
+++ b/beacon-chain/blockchain/init_sync_process_block.go
@@ -4,8 +4,8 @@ import (
 	"context"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
 )

 // This saves a beacon block to the initial sync blocks cache. It rate limits how many blocks
--- a/beacon-chain/blockchain/init_sync_process_block_test.go
+++ b/beacon-chain/blockchain/init_sync_process_block_test.go
@@ -4,10 +4,10 @@ import (
 	"context"
 	"testing"

-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 )

 func TestService_getBlock(t *testing.T) {
--- a/beacon-chain/blockchain/init_test.go
+++ b/beacon-chain/blockchain/init_test.go
@@ -1,7 +1,7 @@
 package blockchain

 import (
-	"github.com/prysmaticlabs/prysm/v3/config/params"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
 )

 func init() {
--- a/beacon-chain/blockchain/log.go
+++ b/beacon-chain/blockchain/log.go
@@ -6,15 +6,15 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	consensusBlocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	prysmTime "github.com/prysmaticlabs/prysm/v3/time"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/blocks"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	consensusBlocks "github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	prysmTime "github.com/prysmaticlabs/prysm/v4/time"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"github.com/sirupsen/logrus"
 )

--- a/beacon-chain/blockchain/log_test.go
+++ b/beacon-chain/blockchain/log_test.go
@@ -3,11 +3,11 @@ package blockchain
 import (
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

--- a/beacon-chain/blockchain/metrics.go
+++ b/beacon-chain/blockchain/metrics.go
@@ -6,15 +6,15 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/altair"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/epoch/precompute"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/altair"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/epoch/precompute"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
 )

 var (
@@ -111,6 +111,18 @@ var (
 		Name: "beacon_reorgs_total",
 		Help: "Count the number of times beacon chain has a reorg",
 	})
+	LateBlockAttemptedReorgCount = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "beacon_late_block_attempted_reorgs",
+		Help: "Count the number of times a proposer served by this beacon has attempted a late block reorg",
+	})
+	lateBlockFailedAttemptFirstThreshold = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "beacon_failed_reorg_attempts_first_threshold",
+		Help: "Count the number of times a proposer served by this beacon attempted a late block reorg but desisted in the first threshold",
+	})
+	lateBlockFailedAttemptSecondThreshold = promauto.NewCounter(prometheus.CounterOpts{
+		Name: "beacon_failed_reorg_attempts_second_threshold",
+		Help: "Count the number of times a proposer served by this beacon attempted a late block reorg but desisted in the second threshold",
+	})
 	saveOrphanedAttCount = promauto.NewCounter(prometheus.CounterOpts{
 		Name: "saved_orphaned_att_total",
 		Help: "Count the number of times an orphaned attestation is saved",
@@ -158,10 +170,6 @@ var (
 		Name: "txs_per_slot_count",
 		Help: "Count the number of txs per slot",
 	})
-	missedPayloadIDFilledCount = promauto.NewCounter(prometheus.CounterOpts{
-		Name: "missed_payload_id_filled_count",
-		Help: "",
-	})
 	onBlockProcessingTime = promauto.NewSummary(prometheus.SummaryOpts{
 		Name: "on_block_processing_milliseconds",
 		Help: "Total time in milliseconds to complete a call to onBlock()",
--- a/beacon-chain/blockchain/metrics_test.go
+++ b/beacon-chain/blockchain/metrics_test.go
@@ -4,9 +4,9 @@ import (
 	"context"
 	"testing"

-	eth "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	eth "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 )

 func TestReportEpochMetrics_BadHeadState(t *testing.T) {
--- a/beacon-chain/blockchain/mock_test.go
+++ b/beacon-chain/blockchain/mock_test.go
@@ -3,9 +3,9 @@ package blockchain
 import (
 	"testing"

-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
 )

 func testServiceOptsWithDB(t *testing.T) []Option {
--- a/beacon-chain/blockchain/options.go
+++ b/beacon-chain/blockchain/options.go
@@ -1,21 +1,21 @@
 package blockchain

 import (
-	"github.com/prysmaticlabs/prysm/v3/async/event"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache/depositcache"
-	statefeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/execution"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/slashings"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/voluntaryexits"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/p2p"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache/depositcache"
+	statefeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/execution"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/blstoexec"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/slashings"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/voluntaryexits"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/p2p"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 )

 type Option func(s *Service) error
--- a/beacon-chain/blockchain/pow_block.go
+++ b/beacon-chain/blockchain/pow_block.go
@@ -10,13 +10,13 @@ import (
 	"github.com/ethereum/go-ethereum/common/hexutil"
 	"github.com/holiman/uint256"
 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"github.com/sirupsen/logrus"
 )

--- a/beacon-chain/blockchain/pow_block_test.go
+++ b/beacon-chain/blockchain/pow_block_test.go
@@ -8,17 +8,17 @@ import (

 	gethtypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/holiman/uint256"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	mocks "github.com/prysmaticlabs/prysm/v3/beacon-chain/execution/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	mocks "github.com/prysmaticlabs/prysm/v4/beacon-chain/execution/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 )

 func Test_validTerminalPowBlock(t *testing.T) {
--- a/beacon-chain/blockchain/process_attestation.go
+++ b/beacon-chain/blockchain/process_attestation.go
@@ -5,12 +5,11 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1/attestation"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1/attestation"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"go.opencensus.io/trace"
 )

@@ -37,7 +36,7 @@ import (
 //
 //	 # Update latest messages for attesting indices
 //	 update_latest_messages(store, indexed_attestation.attesting_indices, attestation)
-func (s *Service) OnAttestation(ctx context.Context, a *ethpb.Attestation) error {
+func (s *Service) OnAttestation(ctx context.Context, a *ethpb.Attestation, disparity time.Duration) error {
 	ctx, span := trace.StartSpan(ctx, "blockChain.onAttestation")
 	defer span.End()

@@ -63,7 +62,7 @@ func (s *Service) OnAttestation(ctx context.Context, a *ethpb.Attestation) error
 	genesisTime := uint64(s.genesisTime.Unix())

 	// Verify attestation target is from current epoch or previous epoch.
-	if err := verifyAttTargetEpoch(ctx, genesisTime, uint64(time.Now().Unix()), tgt); err != nil {
+	if err := verifyAttTargetEpoch(ctx, genesisTime, uint64(time.Now().Add(disparity).Unix()), tgt); err != nil {
 		return err
 	}

@@ -72,11 +71,11 @@ func (s *Service) OnAttestation(ctx context.Context, a *ethpb.Attestation) error
 		return errors.Wrap(err, "could not verify attestation beacon block")
 	}

-	// Note that LMG GHOST and FFG consistency check is ignored because it was performed in sync's validation pipeline:
+	// Note that LMD GHOST and FFG consistency check is ignored because it was performed in sync's validation pipeline:
 	// validate_aggregate_proof.go and validate_beacon_attestation.go

 	// Verify attestations can only affect the fork choice of subsequent slots.
-	if err := slots.VerifyTime(genesisTime, a.Data.Slot+1, params.BeaconNetworkConfig().MaximumGossipClockDisparity); err != nil {
+	if err := slots.VerifyTime(genesisTime, a.Data.Slot+1, disparity); err != nil {
 		return err
 	}

--- a/beacon-chain/blockchain/process_attestation_helpers.go
+++ b/beacon-chain/blockchain/process_attestation_helpers.go
@@ -6,15 +6,15 @@ import (
 	"strconv"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/async"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/async"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )

 // getAttPreState retrieves the att pre state by either from the cache or the DB.
--- a/beacon-chain/blockchain/process_attestation_test.go
+++ b/beacon-chain/blockchain/process_attestation_test.go
@@ -5,19 +5,19 @@ import (
 	"testing"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )

 func TestStore_OnAttestation_ErrorConditions(t *testing.T) {
@@ -117,7 +117,7 @@ func TestStore_OnAttestation_ErrorConditions(t *testing.T) {

 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			err := service.OnAttestation(ctx, tt.a)
+			err := service.OnAttestation(ctx, tt.a, 0)
 			if tt.wantedErr != "" {
 				assert.ErrorContains(t, tt.wantedErr, err)
 			} else {
@@ -154,7 +154,7 @@ func TestStore_OnAttestation_Ok_DoublyLinkedTree(t *testing.T) {
 	state, blkRoot, err := prepareForkchoiceState(ctx, 0, tRoot, tRoot, params.BeaconConfig().ZeroHash, ojc, ofc)
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
-	require.NoError(t, service.OnAttestation(ctx, att[0]))
+	require.NoError(t, service.OnAttestation(ctx, att[0], 0))
 }

 func TestStore_SaveCheckpointState(t *testing.T) {
--- a/beacon-chain/blockchain/process_block.go
+++ b/beacon-chain/blockchain/process_block.go
@@ -6,28 +6,28 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/async/event"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
-	statefeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	coreTime "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/time"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/config/features"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/crypto/bls"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v3/monitoring/tracing"
-	ethpbv1 "github.com/prysmaticlabs/prysm/v3/proto/eth/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1/attestation"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/blocks"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed"
+	statefeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	coreTime "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/time"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/features"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	consensusblocks "github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/crypto/bls"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v4/monitoring/tracing"
+	ethpbv1 "github.com/prysmaticlabs/prysm/v4/proto/eth/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1/attestation"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 )
@@ -108,13 +108,13 @@ func (s *Service) onBlock(ctx context.Context, signed interfaces.ReadOnlySignedB
 	}

 	// Verify that the parent block is in forkchoice
-	if !s.ForkChoicer().HasNode(b.ParentRoot()) {
+	if !s.cfg.ForkChoiceStore.HasNode(b.ParentRoot()) {
 		return ErrNotDescendantOfFinalized
 	}

 	// Save current justified and finalized epochs for future use.
-	currStoreJustifiedEpoch := s.ForkChoicer().JustifiedCheckpoint().Epoch
-	currStoreFinalizedEpoch := s.ForkChoicer().FinalizedCheckpoint().Epoch
+	currStoreJustifiedEpoch := s.cfg.ForkChoiceStore.JustifiedCheckpoint().Epoch
+	currStoreFinalizedEpoch := s.cfg.ForkChoiceStore.FinalizedCheckpoint().Epoch
 	preStateFinalizedEpoch := preState.FinalizedCheckpoint().Epoch
 	preStateJustifiedEpoch := preState.CurrentJustifiedCheckpoint().Epoch

@@ -152,9 +152,6 @@ func (s *Service) onBlock(ctx context.Context, signed interfaces.ReadOnlySignedB
 	if err := s.handleBlockAttestations(ctx, signed.Block(), postState); err != nil {
 		return errors.Wrap(err, "could not handle block's attestations")
 	}
-	if err := s.handleBlockBLSToExecChanges(signed.Block()); err != nil {
-		return errors.Wrap(err, "could not handle block's BLSToExecutionChanges")
-	}

 	s.InsertSlashingsToForkChoiceStore(ctx, signed.Block().Body().AttesterSlashings())
 	if isValidPayload {
@@ -190,18 +187,18 @@ func (s *Service) onBlock(ctx context.Context, signed interfaces.ReadOnlySignedB
 		}()
 	}

-	justified := s.ForkChoicer().JustifiedCheckpoint()
+	justified := s.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	start := time.Now()
 	headRoot, err := s.cfg.ForkChoiceStore.Head(ctx)
 	if err != nil {
 		log.WithError(err).Warn("Could not update head")
 	}
 	if blockRoot != headRoot {
-		receivedWeight, err := s.ForkChoicer().Weight(blockRoot)
+		receivedWeight, err := s.cfg.ForkChoiceStore.Weight(blockRoot)
 		if err != nil {
 			log.WithField("root", fmt.Sprintf("%#x", blockRoot)).Warn("could not determine node weight")
 		}
-		headWeight, err := s.ForkChoicer().Weight(headRoot)
+		headWeight, err := s.cfg.ForkChoiceStore.Weight(headRoot)
 		if err != nil {
 			log.WithField("root", fmt.Sprintf("%#x", headRoot)).Warn("could not determine node weight")
 		}
@@ -214,7 +211,9 @@ func (s *Service) onBlock(ctx context.Context, signed interfaces.ReadOnlySignedB
 	}
 	newBlockHeadElapsedTime.Observe(float64(time.Since(start).Milliseconds()))

-	if err := s.forkchoiceUpdateWithExecution(ctx, headRoot); err != nil {
+	// verify conditions for FCU, notifies FCU, and saves the new head.
+	// This function also prunes attestations, other similar operations happen in prunePostBlockOperationPools.
+	if err := s.forkchoiceUpdateWithExecution(ctx, headRoot, s.CurrentSlot()+1); err != nil {
 		return err
 	}

@@ -253,7 +252,7 @@ func (s *Service) onBlock(ctx context.Context, signed interfaces.ReadOnlySignedB

 	// Save finalized check point to db and more.
 	postStateFinalizedEpoch := postState.FinalizedCheckpoint().Epoch
-	finalized := s.ForkChoicer().FinalizedCheckpoint()
+	finalized := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 	if finalized.Epoch > currStoreFinalizedEpoch || (finalized.Epoch == postStateFinalizedEpoch && finalized.Epoch > preStateFinalizedEpoch) {
 		if err := s.updateFinalized(ctx, &ethpb.Checkpoint{Epoch: finalized.Epoch, Root: finalized.Root[:]}); err != nil {
 			return err
@@ -447,12 +446,22 @@ func (s *Service) onBlockBatch(ctx context.Context, blks []interfaces.ReadOnlySi
 			}
 		}
 	}
+	// Save boundary states that will be useful for forkchoice
+	for r, st := range boundaries {
+		if err := s.cfg.StateGen.SaveState(ctx, r, st); err != nil {
+			return err
+		}
+	}
+	// Also saves the last post state which to be used as pre state for the next batch.
+	lastBR := blockRoots[len(blks)-1]
+	if err := s.cfg.StateGen.SaveState(ctx, lastBR, preState); err != nil {
+		return err
+	}
 	// Insert all nodes but the last one to forkchoice
 	if err := s.cfg.ForkChoiceStore.InsertChain(ctx, pendingNodes); err != nil {
 		return errors.Wrap(err, "could not insert batch to forkchoice")
 	}
 	// Insert the last block to forkchoice
-	lastBR := blockRoots[len(blks)-1]
 	if err := s.cfg.ForkChoiceStore.InsertNode(ctx, preState, lastBR); err != nil {
 		return errors.Wrap(err, "could not insert last block in batch to forkchoice")
 	}
@@ -462,17 +471,7 @@ func (s *Service) onBlockBatch(ctx context.Context, blks []interfaces.ReadOnlySi
 			return errors.Wrap(err, "could not set optimistic block to valid")
 		}
 	}
-
-	for r, st := range boundaries {
-		if err := s.cfg.StateGen.SaveState(ctx, r, st); err != nil {
-			return err
-		}
-	}
-	// Also saves the last post state which to be used as pre state for the next batch.
 	lastB := blks[len(blks)-1]
-	if err := s.cfg.StateGen.SaveState(ctx, lastBR, preState); err != nil {
-		return err
-	}
 	arg := &notifyForkchoiceUpdateArg{
 		headState: preState,
 		headRoot:  lastBR,
@@ -577,7 +576,7 @@ func (s *Service) InsertSlashingsToForkChoiceStore(ctx context.Context, slashing
 	for _, slashing := range slashings {
 		indices := blocks.SlashableAttesterIndices(slashing)
 		for _, index := range indices {
-			s.ForkChoicer().InsertSlashedIndex(ctx, primitives.ValidatorIndex(index))
+			s.cfg.ForkChoiceStore.InsertSlashedIndex(ctx, primitives.ValidatorIndex(index))
 		}
 	}
 }
@@ -597,8 +596,8 @@ func (s *Service) savePostStateInfo(ctx context.Context, r [32]byte, b interface
 }

 // This removes the attestations in block `b` from the attestation mem pool.
-func (s *Service) pruneAttsFromPool(b interfaces.ReadOnlySignedBeaconBlock) error {
-	atts := b.Block().Body().Attestations()
+func (s *Service) pruneAttsFromPool(headBlock interfaces.ReadOnlySignedBeaconBlock) error {
+	atts := headBlock.Block().Body().Attestations()
 	for _, att := range atts {
 		if helpers.IsAggregated(att) {
 			if err := s.cfg.AttPool.DeleteAggregatedAttestation(att); err != nil {
@@ -667,15 +666,16 @@ func (s *Service) fillMissingPayloadIDRoutine(ctx context.Context, stateFeed *ev
 			break
 		}

-		ticker := time.NewTicker(time.Second)
-		defer ticker.Stop()
+		attThreshold := params.BeaconConfig().SecondsPerSlot / 3
+		ticker := slots.NewSlotTickerWithOffset(s.genesisTime, time.Duration(attThreshold)*time.Second, params.BeaconConfig().SecondsPerSlot)
 		for {
 			select {
-			case ti := <-ticker.C:
-				if err := s.fillMissingBlockPayloadId(ctx, ti); err != nil {
+			case <-ticker.C():
+				if err := s.fillMissingBlockPayloadId(ctx); err != nil {
 					log.WithError(err).Error("Could not fill missing payload ID")
 				}
-			case <-s.ctx.Done():
+
+			case <-ctx.Done():
 				log.Debug("Context closed, exiting routine")
 				return
 			}
@@ -683,32 +683,26 @@ func (s *Service) fillMissingPayloadIDRoutine(ctx context.Context, stateFeed *ev
 	}()
 }

-// Returns true if time `t` is halfway through the slot in sec.
-func atHalfSlot(t time.Time) bool {
-	s := params.BeaconConfig().SecondsPerSlot
-	return uint64(t.Second())%s == s/2
-}
+// fillMissingBlockPayloadId is called 4 seconds into the slot and calls FCU if we are proposing next slot
+// and the cache has been missed
+func (s *Service) fillMissingBlockPayloadId(ctx context.Context) error {
+	if s.CurrentSlot() == s.HeadSlot() {
+		return nil
+	}
+	s.cfg.StateNotifier.StateFeed().Send(&feed.Event{
+		Type: statefeed.MissedSlot,
+	})

-func (s *Service) fillMissingBlockPayloadId(ctx context.Context, ti time.Time) error {
-	if !atHalfSlot(ti) {
-		return nil
-	}
-	s.ForkChoicer().RLock()
-	highestReceivedSlot := s.cfg.ForkChoiceStore.HighestReceivedBlockSlot()
-	s.ForkChoicer().RUnlock()
-	if s.CurrentSlot() == highestReceivedSlot {
-		return nil
-	}
 	// Head root should be empty when retrieving proposer index for the next slot.
 	_, id, has := s.cfg.ProposerSlotIndexCache.GetProposerPayloadIDs(s.CurrentSlot()+1, [32]byte{} /* head root */)
 	// There exists proposer for next slot, but we haven't called fcu w/ payload attribute yet.
 	if !has || id != [8]byte{} {
 		return nil
 	}
-	missedPayloadIDFilledCount.Inc()
 	s.headLock.RLock()
 	headBlock, err := s.headBlock()
 	if err != nil {
+		s.headLock.RUnlock()
 		return err
 	}
 	headState := s.headState(ctx)
--- a/beacon-chain/blockchain/process_block_helpers.go
+++ b/beacon-chain/blockchain/process_block_helpers.go
@@ -5,16 +5,16 @@ import (
 	"fmt"

 	"github.com/pkg/errors"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	mathutil "github.com/prysmaticlabs/prysm/v3/math"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	mathutil "github.com/prysmaticlabs/prysm/v4/math"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"go.opencensus.io/trace"
 )

@@ -85,7 +85,7 @@ func (s *Service) verifyBlkPreState(ctx context.Context, b interfaces.ReadOnlyBe
 // verifyBlkFinalizedSlot validates input block is not less than or equal
 // to current finalized slot.
 func (s *Service) verifyBlkFinalizedSlot(b interfaces.ReadOnlyBeaconBlock) error {
-	finalized := s.ForkChoicer().FinalizedCheckpoint()
+	finalized := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 	finalizedSlot, err := slots.EpochStart(finalized.Epoch)
 	if err != nil {
 		return err
@@ -146,39 +146,6 @@ func (s *Service) updateFinalized(ctx context.Context, cp *ethpb.Checkpoint) err
 	return nil
 }

-// ancestor returns the block root of an ancestry block from the input block root.
-//
-// Spec pseudocode definition:
-//
-//	def get_ancestor(store: Store, root: Root, slot: Slot) -> Root:
-//	 block = store.blocks[root]
-//	 if block.slot > slot:
-//	     return get_ancestor(store, block.parent_root, slot)
-//	 elif block.slot == slot:
-//	     return root
-//	 else:
-//	     # root is older than queried slot, thus a skip slot. Return most recent root prior to slot
-//	     return root
-func (s *Service) ancestor(ctx context.Context, root []byte, slot primitives.Slot) ([]byte, error) {
-	ctx, span := trace.StartSpan(ctx, "blockChain.ancestor")
-	defer span.End()
-
-	r := bytesutil.ToBytes32(root)
-	// Get ancestor root from fork choice store instead of recursively looking up blocks in DB.
-	// This is most optimal outcome.
-	ar, err := s.cfg.ForkChoiceStore.AncestorRoot(ctx, r, slot)
-	if err != nil {
-		// Try getting ancestor root from DB when failed to retrieve from fork choice store.
-		// This is the second line of defense for retrieving ancestor root.
-		ar, err = s.ancestorByDB(ctx, r, slot)
-		if err != nil {
-			return nil, err
-		}
-	}
-
-	return ar[:], nil
-}
-
 // This retrieves an ancestor root using DB. The look up is recursively looking up DB. Slower than `ancestorByForkChoiceStore`.
 func (s *Service) ancestorByDB(ctx context.Context, r [32]byte, slot primitives.Slot) (root [32]byte, err error) {
 	ctx, span := trace.StartSpan(ctx, "blockChain.ancestorByDB")
@@ -210,7 +177,7 @@ func (s *Service) fillInForkChoiceMissingBlocks(ctx context.Context, blk interfa
 	pendingNodes := make([]*forkchoicetypes.BlockAndCheckpoints, 0)

 	// Fork choice only matters from last finalized slot.
-	finalized := s.ForkChoicer().FinalizedCheckpoint()
+	finalized := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 	fSlot, err := slots.EpochStart(finalized.Epoch)
 	if err != nil {
 		return err
@@ -236,7 +203,7 @@ func (s *Service) fillInForkChoiceMissingBlocks(ctx context.Context, blk interfa
 	if len(pendingNodes) == 1 {
 		return nil
 	}
-	if root != s.ensureRootNotZeros(finalized.Root) && !s.ForkChoicer().HasNode(root) {
+	if root != s.ensureRootNotZeros(finalized.Root) && !s.cfg.ForkChoiceStore.HasNode(root) {
 		return ErrNotDescendantOfFinalized
 	}
 	return s.cfg.ForkChoiceStore.InsertChain(ctx, pendingNodes)
--- a/beacon-chain/blockchain/process_block_test.go
+++ b/beacon-chain/blockchain/process_block_test.go
@@ -12,35 +12,35 @@ import (
 	"github.com/ethereum/go-ethereum/common"
 	gethtypes "github.com/ethereum/go-ethereum/core/types"
 	"github.com/pkg/errors"
-	mock "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache/depositcache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/signing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/execution"
-	mockExecution "github.com/prysmaticlabs/prysm/v3/beacon-chain/execution/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/crypto/bls"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	enginev1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	prysmTime "github.com/prysmaticlabs/prysm/v3/time"
+	mock "github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain/testing"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache/depositcache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/blocks"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/signing"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/execution"
+	mockExecution "github.com/prysmaticlabs/prysm/v4/beacon-chain/execution/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	consensusblocks "github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/crypto/bls"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	prysmTime "github.com/prysmaticlabs/prysm/v4/time"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

@@ -139,7 +139,7 @@ func TestStore_OnBlock(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			fRoot := bytesutil.ToBytes32(roots[0])
-			require.NoError(t, service.ForkChoicer().UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Root: fRoot}))
+			require.NoError(t, service.cfg.ForkChoiceStore.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Root: fRoot}))
 			root, err := tt.blk.Block.HashTreeRoot()
 			assert.NoError(t, err)
 			wsb, err := consensusblocks.NewSignedBeaconBlock(tt.blk)
@@ -288,9 +288,9 @@ func TestFillForkChoiceMissingBlocks_CanSave(t *testing.T) {
 	r0 := bytesutil.ToBytes32(roots[0])
 	state, blkRoot, err := prepareForkchoiceState(ctx, 0, r0, service.originBlockRoot, [32]byte{}, fcp, fcp)
 	require.NoError(t, err)
-	require.NoError(t, service.ForkChoicer().InsertNode(ctx, state, blkRoot))
+	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	fcp2 := &forkchoicetypes.Checkpoint{Epoch: 0, Root: r0}
-	require.NoError(t, service.ForkChoicer().UpdateFinalizedCheckpoint(fcp2))
+	require.NoError(t, service.cfg.ForkChoiceStore.UpdateFinalizedCheckpoint(fcp2))

 	err = service.fillInForkChoiceMissingBlocks(
 		context.Background(), wsb.Block(), beaconState.FinalizedCheckpoint(), beaconState.CurrentJustifiedCheckpoint())
@@ -339,9 +339,9 @@ func TestFillForkChoiceMissingBlocks_RootsMatch(t *testing.T) {
 	r0 := bytesutil.ToBytes32(roots[0])
 	state, blkRoot, err := prepareForkchoiceState(ctx, 0, r0, service.originBlockRoot, [32]byte{}, fcp, fcp)
 	require.NoError(t, err)
-	require.NoError(t, service.ForkChoicer().InsertNode(ctx, state, blkRoot))
+	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	fcp2 := &forkchoicetypes.Checkpoint{Epoch: 0, Root: r0}
-	require.NoError(t, service.ForkChoicer().UpdateFinalizedCheckpoint(fcp2))
+	require.NoError(t, service.cfg.ForkChoiceStore.UpdateFinalizedCheckpoint(fcp2))

 	err = service.fillInForkChoiceMissingBlocks(
 		context.Background(), wsb.Block(), beaconState.FinalizedCheckpoint(), beaconState.CurrentJustifiedCheckpoint())
@@ -406,7 +406,7 @@ func TestFillForkChoiceMissingBlocks_FilterFinalized(t *testing.T) {
 	beaconState, _ := util.DeterministicGenesisState(t, 32)

 	// Set finalized epoch to 2.
-	require.NoError(t, service.ForkChoicer().UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Epoch: 2, Root: r64}))
+	require.NoError(t, service.cfg.ForkChoiceStore.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Epoch: 2, Root: r64}))
 	err = service.fillInForkChoiceMissingBlocks(
 		context.Background(), wsb.Block(), beaconState.FinalizedCheckpoint(), beaconState.CurrentJustifiedCheckpoint())
 	require.NoError(t, err)
@@ -600,14 +600,14 @@ func TestAncestor_HandleSkipSlot(t *testing.T) {
 	}

 	// Slots 100 to 200 are skip slots. Requesting root at 150 will yield root at 100. The last physical block.
-	r, err := service.ancestor(context.Background(), r200[:], 150)
+	r, err := service.Ancestor(context.Background(), r200[:], 150)
 	require.NoError(t, err)
 	if bytesutil.ToBytes32(r) != r100 {
 		t.Error("Did not get correct root")
 	}

 	// Slots 1 to 100 are skip slots. Requesting root at 50 will yield root at 1. The last physical block.
-	r, err = service.ancestor(context.Background(), r200[:], 50)
+	r, err = service.Ancestor(context.Background(), r200[:], 50)
 	require.NoError(t, err)
 	if bytesutil.ToBytes32(r) != r1 {
 		t.Error("Did not get correct root")
@@ -648,7 +648,7 @@ func TestAncestor_CanUseForkchoice(t *testing.T) {
 		require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blkRoot))
 	}

-	r, err := service.ancestor(context.Background(), r200[:], 150)
+	r, err := service.Ancestor(context.Background(), r200[:], 150)
 	require.NoError(t, err)
 	if bytesutil.ToBytes32(r) != r100 {
 		t.Error("Did not get correct root")
@@ -696,7 +696,7 @@ func TestAncestor_CanUseDB(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, st, blkRoot))

-	r, err := service.ancestor(context.Background(), r200[:], 150)
+	r, err := service.Ancestor(context.Background(), r200[:], 150)
 	require.NoError(t, err)
 	if bytesutil.ToBytes32(r) != r100 {
 		t.Error("Did not get correct root")
@@ -1363,7 +1363,7 @@ func Test_verifyBlkFinalizedSlot_invalidBlock(t *testing.T) {
 	}
 	service, err := NewService(ctx, opts...)
 	require.NoError(t, err)
-	require.NoError(t, service.ForkChoicer().UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Epoch: 1}))
+	require.NoError(t, service.cfg.ForkChoiceStore.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Epoch: 1}))
 	blk := util.HydrateBeaconBlock(&ethpb.BeaconBlock{Slot: 1})
 	wb, err := consensusblocks.NewBeaconBlock(blk)
 	require.NoError(t, err)
@@ -1459,7 +1459,7 @@ func TestStore_NoViableHead_FCU(t *testing.T) {
 		require.NoError(t, err)
 	}
 	// Check that we haven't justified the second epoch yet
-	jc := service.ForkChoicer().JustifiedCheckpoint()
+	jc := service.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(0), jc.Epoch)

 	// import a block that justifies the second epoch
@@ -1474,14 +1474,14 @@ func TestStore_NoViableHead_FCU(t *testing.T) {
 	require.NoError(t, err)
 	err = service.onBlock(ctx, wsb, firstInvalidRoot)
 	require.NoError(t, err)
-	jc = service.ForkChoicer().JustifiedCheckpoint()
+	jc = service.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(2), jc.Epoch)

 	sjc := validHeadState.CurrentJustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(0), sjc.Epoch)
 	lvh := b.Block.Body.ExecutionPayload.ParentHash
 	// check our head
-	require.Equal(t, firstInvalidRoot, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, firstInvalidRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())

 	// import another block to find out that it was invalid
 	mockEngine = &mockExecution.EngineClient{ErrNewPayload: execution.ErrAcceptedSyncingPayloadStatus, ErrForkchoiceUpdated: execution.ErrInvalidPayloadStatus, ForkChoiceUpdatedResp: lvh}
@@ -1500,7 +1500,7 @@ func TestStore_NoViableHead_FCU(t *testing.T) {
 	// Check that forkchoice's head is the last invalid block imported. The
 	// store's headroot is the previous head (since the invalid block did
 	// not finish importing) one and that the node is optimistic
-	require.Equal(t, root, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, root, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	headRoot, err := service.HeadRoot(ctx)
 	require.NoError(t, err)
 	require.Equal(t, firstInvalidRoot, bytesutil.ToBytes32(headRoot))
@@ -1522,7 +1522,7 @@ func TestStore_NoViableHead_FCU(t *testing.T) {
 	require.NoError(t, err)
 	// Check the newly imported block is head, it justified the right
 	// checkpoint and the node is no longer optimistic
-	require.Equal(t, root, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, root, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	sjc = service.CurrentJustifiedCheckpt()
 	require.Equal(t, jc.Epoch, sjc.Epoch)
 	require.Equal(t, jc.Root, bytesutil.ToBytes32(sjc.Root))
@@ -1619,7 +1619,7 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 		require.NoError(t, err)
 	}
 	// Check that we haven't justified the second epoch yet
-	jc := service.ForkChoicer().JustifiedCheckpoint()
+	jc := service.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(0), jc.Epoch)

 	// import a block that justifies the second epoch
@@ -1634,14 +1634,14 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 	require.NoError(t, err)
 	err = service.onBlock(ctx, wsb, firstInvalidRoot)
 	require.NoError(t, err)
-	jc = service.ForkChoicer().JustifiedCheckpoint()
+	jc = service.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(2), jc.Epoch)

 	sjc := validHeadState.CurrentJustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(0), sjc.Epoch)
 	lvh := b.Block.Body.ExecutionPayload.ParentHash
 	// check our head
-	require.Equal(t, firstInvalidRoot, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, firstInvalidRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())

 	// import another block to find out that it was invalid
 	mockEngine = &mockExecution.EngineClient{ErrNewPayload: execution.ErrInvalidPayloadStatus, NewPayloadResp: lvh}
@@ -1660,7 +1660,7 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 	// Check that forkchoice's head and store's headroot are the previous head (since the invalid block did
 	// not finish importing and it was never imported to forkchoice). Check
 	// also that the node is optimistic
-	require.Equal(t, firstInvalidRoot, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, firstInvalidRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	headRoot, err := service.HeadRoot(ctx)
 	require.NoError(t, err)
 	require.Equal(t, firstInvalidRoot, bytesutil.ToBytes32(headRoot))
@@ -1682,7 +1682,7 @@ func TestStore_NoViableHead_NewPayload(t *testing.T) {
 	require.NoError(t, err)
 	// Check the newly imported block is head, it justified the right
 	// checkpoint and the node is no longer optimistic
-	require.Equal(t, root, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, root, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	sjc = service.CurrentJustifiedCheckpt()
 	require.Equal(t, jc.Epoch, sjc.Epoch)
 	require.Equal(t, jc.Root, bytesutil.ToBytes32(sjc.Root))
@@ -1802,9 +1802,9 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 		require.NoError(t, err)
 	}
 	// Check that we have justified the second epoch
-	jc := service.ForkChoicer().JustifiedCheckpoint()
+	jc := service.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(2), jc.Epoch)
-	invalidHeadRoot := service.ForkChoicer().CachedHeadRoot()
+	invalidHeadRoot := service.cfg.ForkChoiceStore.CachedHeadRoot()

 	// import block 19 to find out that the whole chain 13--18 was in fact
 	// invalid
@@ -1825,7 +1825,7 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 	// Check that forkchoice's head and store's headroot are the previous head (since the invalid block did
 	// not finish importing and it was never imported to forkchoice). Check
 	// also that the node is optimistic
-	require.Equal(t, invalidHeadRoot, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, invalidHeadRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	headRoot, err := service.HeadRoot(ctx)
 	require.NoError(t, err)
 	require.Equal(t, invalidHeadRoot, bytesutil.ToBytes32(headRoot))
@@ -1855,7 +1855,7 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, service.onBlock(ctx, wsb, root))
 	// Check that the head is still INVALID and the node is still optimistic
-	require.Equal(t, invalidHeadRoot, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, invalidHeadRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	optimistic, err = service.IsOptimistic(ctx)
 	require.NoError(t, err)
 	require.Equal(t, true, optimistic)
@@ -1877,7 +1877,7 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 		require.NoError(t, err)
 	}
 	// Head should still be INVALID and the node optimistic
-	require.Equal(t, invalidHeadRoot, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, invalidHeadRoot, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	optimistic, err = service.IsOptimistic(ctx)
 	require.NoError(t, err)
 	require.Equal(t, true, optimistic)
@@ -1893,7 +1893,7 @@ func TestStore_NoViableHead_Liveness(t *testing.T) {
 	require.NoError(t, err)
 	err = service.onBlock(ctx, wsb, root)
 	require.NoError(t, err)
-	require.Equal(t, root, service.ForkChoicer().CachedHeadRoot())
+	require.Equal(t, root, service.cfg.ForkChoiceStore.CachedHeadRoot())
 	sjc = service.CurrentJustifiedCheckpt()
 	require.Equal(t, primitives.Epoch(4), sjc.Epoch)
 	optimistic, err = service.IsOptimistic(ctx)
@@ -2011,7 +2011,7 @@ func TestNoViableHead_Reboot(t *testing.T) {
 		require.NoError(t, service.onBlock(ctx, wsb, root))
 	}
 	// Check that we have justified the second epoch
-	jc := service.ForkChoicer().JustifiedCheckpoint()
+	jc := service.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	require.Equal(t, primitives.Epoch(2), jc.Epoch)

 	// import block 19 to find out that the whole chain 13--18 was in fact
@@ -2045,7 +2045,7 @@ func TestNoViableHead_Reboot(t *testing.T) {
 	require.NoError(t, service.StartFromSavedState(genesisState))

 	// Forkchoice has the genesisRoot loaded at startup
-	require.Equal(t, genesisRoot, service.ensureRootNotZeros(service.ForkChoicer().CachedHeadRoot()))
+	require.Equal(t, genesisRoot, service.ensureRootNotZeros(service.cfg.ForkChoiceStore.CachedHeadRoot()))
 	// Service's store has the finalized state as headRoot
 	headRoot, err := service.HeadRoot(ctx)
 	require.NoError(t, err)
@@ -2072,7 +2072,7 @@ func TestNoViableHead_Reboot(t *testing.T) {
 	// We use onBlockBatch here because the valid chain is missing in forkchoice
 	require.NoError(t, service.onBlockBatch(ctx, []interfaces.ReadOnlySignedBeaconBlock{wsb}, [][32]byte{root}))
 	// Check that the head is now VALID and the node is not optimistic
-	require.Equal(t, genesisRoot, service.ensureRootNotZeros(service.ForkChoicer().CachedHeadRoot()))
+	require.Equal(t, genesisRoot, service.ensureRootNotZeros(service.cfg.ForkChoiceStore.CachedHeadRoot()))
 	headRoot, err = service.HeadRoot(ctx)
 	require.NoError(t, err)
 	require.Equal(t, root, bytesutil.ToBytes32(headRoot))
@@ -2164,7 +2164,7 @@ func TestFillMissingBlockPayloadId_DiffSlotExitEarly(t *testing.T) {

 	service, err := NewService(ctx, opts...)
 	require.NoError(t, err)
-	require.NoError(t, service.fillMissingBlockPayloadId(ctx, time.Unix(int64(params.BeaconConfig().SecondsPerSlot/2), 0)))
+	require.NoError(t, service.fillMissingBlockPayloadId(ctx), 0)
 }

 // Helper function to simulate the block being on time or delayed for proposer
--- a/beacon-chain/blockchain/receive_attestation.go
+++ b/beacon-chain/blockchain/receive_attestation.go
@@ -7,18 +7,24 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/async/event"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/config/features"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 )

+// reorgLateBlockCountAttestations is the time until the end of the slot in which we count
+// attestations to see if we will reorg the incoming block
+const reorgLateBlockCountAttestations = 2 * time.Second
+
 // AttestationStateFetcher allows for retrieving a beacon state corresponding to the block
 // root of an attestation's target checkpoint.
 type AttestationStateFetcher interface {
@@ -50,7 +56,7 @@ func (s *Service) VerifyLmdFfgConsistency(ctx context.Context, a *ethpb.Attestat
 	if err != nil {
 		return err
 	}
-	r, err := s.ancestor(ctx, a.Data.BeaconBlockRoot, targetSlot)
+	r, err := s.Ancestor(ctx, a.Data.BeaconBlockRoot, targetSlot)
 	if err != nil {
 		return err
 	}
@@ -88,30 +94,39 @@ func (s *Service) spawnProcessAttestationsRoutine(stateFeed *event.Feed) {
 		}

 		st := slots.NewSlotTicker(s.genesisTime, params.BeaconConfig().SecondsPerSlot)
+		pat := slots.NewSlotTickerWithOffset(s.genesisTime, -reorgLateBlockCountAttestations, params.BeaconConfig().SecondsPerSlot)
 		for {
 			select {
 			case <-s.ctx.Done():
 				return
+			case <-pat.C():
+				s.UpdateHead(s.ctx, s.CurrentSlot()+1)
 			case <-st.C():
-				if err := s.ForkChoicer().NewSlot(s.ctx, s.CurrentSlot()); err != nil {
-					log.WithError(err).Error("Could not process new slot")
+				s.cfg.ForkChoiceStore.Lock()
+				if err := s.cfg.ForkChoiceStore.NewSlot(s.ctx, s.CurrentSlot()); err != nil {
+					log.WithError(err).Error("could not process new slot")
 				}
+				s.cfg.ForkChoiceStore.Unlock()

-				if err := s.UpdateHead(s.ctx); err != nil {
-					log.WithError(err).Error("Could not process attestations and update head")
-				}
+				s.UpdateHead(s.ctx, s.CurrentSlot())
 			}
 		}
 	}()
 }

 // UpdateHead updates the canonical head of the chain based on information from fork-choice attestations and votes.
-// It requires no external inputs.
-func (s *Service) UpdateHead(ctx context.Context) error {
+// The caller of this function MUST hold a lock in forkchoice
+func (s *Service) UpdateHead(ctx context.Context, proposingSlot primitives.Slot) {
 	start := time.Now()
-	s.ForkChoicer().Lock()
-	defer s.ForkChoicer().Unlock()
-	s.processAttestations(ctx)
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
+	// This function is only called at 10 seconds or 0 seconds into the slot
+	disparity := params.BeaconNetworkConfig().MaximumGossipClockDisparity
+	if !features.Get().DisableReorgLateBlocks {
+		disparity += reorgLateBlockCountAttestations
+	}
+	s.processAttestations(ctx, disparity)
+
 	processAttsElapsedTime.Observe(float64(time.Since(start).Milliseconds()))

 	start = time.Now()
@@ -129,21 +144,20 @@ func (s *Service) UpdateHead(ctx context.Context) error {
 		}).Debug("Head changed due to attestations")
 	}
 	s.headLock.RUnlock()
-	if err := s.forkchoiceUpdateWithExecution(ctx, newHeadRoot); err != nil {
-		return err
+	if err := s.forkchoiceUpdateWithExecution(s.ctx, newHeadRoot, proposingSlot); err != nil {
+		log.WithError(err).Error("could not update forkchoice")
 	}
-	return nil
 }

 // This processes fork choice attestations from the pool to account for validator votes and fork choice.
-func (s *Service) processAttestations(ctx context.Context) {
+func (s *Service) processAttestations(ctx context.Context, disparity time.Duration) {
 	atts := s.cfg.AttPool.ForkchoiceAttestations()
 	for _, a := range atts {
 		// Based on the spec, don't process the attestation until the subsequent slot.
 		// This delays consideration in the fork choice until their slot is in the past.
 		// https://github.com/ethereum/consensus-specs/blob/dev/specs/phase0/fork-choice.md#validate_on_attestation
 		nextSlot := a.Data.Slot + 1
-		if err := slots.VerifyTime(uint64(s.genesisTime.Unix()), nextSlot, params.BeaconNetworkConfig().MaximumGossipClockDisparity); err != nil {
+		if err := slots.VerifyTime(uint64(s.genesisTime.Unix()), nextSlot, disparity); err != nil {
 			continue
 		}

@@ -161,7 +175,7 @@ func (s *Service) processAttestations(ctx context.Context) {
 			continue
 		}

-		if err := s.receiveAttestationNoPubsub(ctx, a); err != nil {
+		if err := s.receiveAttestationNoPubsub(ctx, a, disparity); err != nil {
 			log.WithFields(logrus.Fields{
 				"slot":             a.Data.Slot,
 				"committeeIndex":   a.Data.CommitteeIndex,
@@ -178,11 +192,11 @@ func (s *Service) processAttestations(ctx context.Context) {
 //  1. Validate attestation, update validator's latest vote
 //  2. Apply fork choice to the processed attestation
 //  3. Save latest head info
-func (s *Service) receiveAttestationNoPubsub(ctx context.Context, att *ethpb.Attestation) error {
+func (s *Service) receiveAttestationNoPubsub(ctx context.Context, att *ethpb.Attestation, disparity time.Duration) error {
 	ctx, span := trace.StartSpan(ctx, "beacon-chain.blockchain.receiveAttestationNoPubsub")
 	defer span.End()

-	if err := s.OnAttestation(ctx, att); err != nil {
+	if err := s.OnAttestation(ctx, att, disparity); err != nil {
 		return errors.Wrap(err, "could not process attestation")
 	}

--- a/beacon-chain/blockchain/receive_attestation_test.go
+++ b/beacon-chain/blockchain/receive_attestation_test.go
@@ -5,22 +5,22 @@ import (
 	"testing"
 	"time"

-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	prysmTime "github.com/prysmaticlabs/prysm/v3/time"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	prysmTime "github.com/prysmaticlabs/prysm/v4/time"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

@@ -120,7 +120,7 @@ func TestProcessAttestations_Ok(t *testing.T) {
 	require.NoError(t, err)
 	require.NoError(t, service.cfg.ForkChoiceStore.InsertNode(ctx, state, blkRoot))
 	require.NoError(t, service.cfg.AttPool.SaveForkchoiceAttestations(atts))
-	service.processAttestations(ctx)
+	service.processAttestations(ctx, 0)
 	require.Equal(t, 0, len(service.cfg.AttPool.ForkchoiceAttestations()))
 	require.LogsDoNotContain(t, hook, "Could not process attestation for fork choice")
 }
@@ -183,10 +183,9 @@ func TestService_ProcessAttestationsAndUpdateHead(t *testing.T) {
 	service.head.root = r // Old head

 	require.Equal(t, 1, len(service.cfg.AttPool.ForkchoiceAttestations()))
-	require.NoError(t, err, service.UpdateHead(ctx))
-
+	service.UpdateHead(ctx, 0)
+	require.Equal(t, tRoot, service.headRoot())
 	require.Equal(t, 0, len(service.cfg.AttPool.ForkchoiceAttestations())) // Validate att pool is empty
-	require.Equal(t, tRoot, service.head.root)                             // Validate head is the new one
 }

 func TestService_UpdateHead_NoAtts(t *testing.T) {
@@ -236,9 +235,8 @@ func TestService_UpdateHead_NoAtts(t *testing.T) {
 	require.Equal(t, 3, fcs.NodeCount())

 	require.Equal(t, 0, service.cfg.AttPool.ForkchoiceAttestationCount())
-	require.NoError(t, err, service.UpdateHead(ctx))
+	service.UpdateHead(ctx, 0)
+	require.Equal(t, r, service.headRoot())

 	require.Equal(t, 0, len(service.cfg.AttPool.ForkchoiceAttestations())) // Validate att pool is empty
-	require.Equal(t, r, service.head.root)                                 // Validate head is the new one
-
 }
--- a/beacon-chain/blockchain/receive_block.go
+++ b/beacon-chain/blockchain/receive_block.go
@@ -1,19 +1,20 @@
 package blockchain

 import (
+	"bytes"
 	"context"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
-	statefeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	"github.com/prysmaticlabs/prysm/v3/monitoring/tracing"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/runtime/version"
-	"github.com/prysmaticlabs/prysm/v3/time"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed"
+	statefeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/state"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	"github.com/prysmaticlabs/prysm/v4/monitoring/tracing"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/runtime/version"
+	"github.com/prysmaticlabs/prysm/v4/time"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"go.opencensus.io/trace"
 )

@@ -48,7 +49,6 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig

 	s.cfg.ForkChoiceStore.Lock()
 	defer s.cfg.ForkChoiceStore.Unlock()
-
 	// Apply state transition on the new block.
 	if err := s.onBlock(ctx, blockCopy, blockRoot); err != nil {
 		err := errors.Wrap(err, "could not process block")
@@ -56,9 +56,9 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig
 		return err
 	}

-	// Handle post block operations such as attestations and exits.
-	if err := s.handlePostBlockOperations(blockCopy.Block()); err != nil {
-		return err
+	// Handle post block operations such as pruning exits and bls messages if incoming block is the head
+	if err := s.prunePostBlockOperationPools(ctx, blockCopy, blockRoot); err != nil {
+		log.WithError(err).Error("Could not prune canonical objects from pool ")
 	}

 	// Have we been finalizing? Should we start saving hot states to db?
@@ -67,12 +67,12 @@ func (s *Service) ReceiveBlock(ctx context.Context, block interfaces.ReadOnlySig
 	}

 	// Reports on block and fork choice metrics.
-	cp := s.ForkChoicer().FinalizedCheckpoint()
+	cp := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 	finalized := &ethpb.Checkpoint{Epoch: cp.Epoch, Root: bytesutil.SafeCopyBytes(cp.Root[:])}
 	reportSlotMetrics(blockCopy.Block().Slot(), s.HeadSlot(), s.CurrentSlot(), finalized)

 	// Log block sync status.
-	cp = s.ForkChoicer().JustifiedCheckpoint()
+	cp = s.cfg.ForkChoiceStore.JustifiedCheckpoint()
 	justified := &ethpb.Checkpoint{Epoch: cp.Epoch, Root: bytesutil.SafeCopyBytes(cp.Root[:])}
 	if err := logBlockSyncStatus(blockCopy.Block(), blockRoot, justified, finalized, receivedTime, uint64(s.genesisTime.Unix())); err != nil {
 		log.WithError(err).Error("Unable to log block sync status")
@@ -123,7 +123,7 @@ func (s *Service) ReceiveBlockBatch(ctx context.Context, blocks []interfaces.Rea
 		})

 		// Reports on blockCopy and fork choice metrics.
-		cp := s.ForkChoicer().FinalizedCheckpoint()
+		cp := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 		finalized := &ethpb.Checkpoint{Epoch: cp.Epoch, Root: bytesutil.SafeCopyBytes(cp.Root[:])}
 		reportSlotMetrics(blockCopy.Block().Slot(), s.HeadSlot(), s.CurrentSlot(), finalized)
 	}
@@ -131,7 +131,7 @@ func (s *Service) ReceiveBlockBatch(ctx context.Context, blocks []interfaces.Rea
 	if err := s.cfg.BeaconDB.SaveBlocks(ctx, s.getInitSyncBlocks()); err != nil {
 		return err
 	}
-	finalized := s.ForkChoicer().FinalizedCheckpoint()
+	finalized := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 	if finalized == nil {
 		return errNilFinalizedInStore
 	}
@@ -152,34 +152,45 @@ func (s *Service) HasBlock(ctx context.Context, root [32]byte) bool {

 // ReceiveAttesterSlashing receives an attester slashing and inserts it to forkchoice
 func (s *Service) ReceiveAttesterSlashing(ctx context.Context, slashing *ethpb.AttesterSlashing) {
-	s.ForkChoicer().Lock()
-	defer s.ForkChoicer().Unlock()
+	s.cfg.ForkChoiceStore.Lock()
+	defer s.cfg.ForkChoiceStore.Unlock()
 	s.InsertSlashingsToForkChoiceStore(ctx, []*ethpb.AttesterSlashing{slashing})
 }

-func (s *Service) handlePostBlockOperations(b interfaces.ReadOnlyBeaconBlock) error {
+// prunePostBlockOperationPools only runs on new head otherwise should return a nil.
+func (s *Service) prunePostBlockOperationPools(ctx context.Context, blk interfaces.ReadOnlySignedBeaconBlock, root [32]byte) error {
+	headRoot, err := s.HeadRoot(ctx)
+	if err != nil {
+		return err
+	}
+	// By comparing the current headroot, that has already gone through forkchoice,
+	// we can assume that if equal the current block root is canonical.
+	if !bytes.Equal(headRoot, root[:]) {
+		return nil
+	}
+
 	// Mark block exits as seen so we don't include same ones in future blocks.
-	for _, e := range b.Body().VoluntaryExits() {
+	for _, e := range blk.Block().Body().VoluntaryExits() {
 		s.cfg.ExitPool.MarkIncluded(e)
 	}

 	// Mark block BLS changes as seen so we don't include same ones in future blocks.
-	if err := s.handleBlockBLSToExecChanges(b); err != nil {
+	if err := s.markIncludedBlockBLSToExecChanges(blk.Block()); err != nil {
 		return errors.Wrap(err, "could not process BLSToExecutionChanges")
 	}

 	//  Mark attester slashings as seen so we don't include same ones in future blocks.
-	for _, as := range b.Body().AttesterSlashings() {
+	for _, as := range blk.Block().Body().AttesterSlashings() {
 		s.cfg.SlashingPool.MarkIncludedAttesterSlashing(as)
 	}
 	return nil
 }

-func (s *Service) handleBlockBLSToExecChanges(blk interfaces.ReadOnlyBeaconBlock) error {
-	if blk.Version() < version.Capella {
+func (s *Service) markIncludedBlockBLSToExecChanges(headBlock interfaces.ReadOnlyBeaconBlock) error {
+	if headBlock.Version() < version.Capella {
 		return nil
 	}
-	changes, err := blk.Body().BLSToExecutionChanges()
+	changes, err := headBlock.Body().BLSToExecutionChanges()
 	if err != nil {
 		return errors.Wrap(err, "could not get BLSToExecutionChanges")
 	}
@@ -196,7 +207,7 @@ func (s *Service) checkSaveHotStateDB(ctx context.Context) error {
 	currentEpoch := slots.ToEpoch(s.CurrentSlot())
 	// Prevent `sinceFinality` going underflow.
 	var sinceFinality primitives.Epoch
-	finalized := s.ForkChoicer().FinalizedCheckpoint()
+	finalized := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 	if finalized == nil {
 		return errNilFinalizedInStore
 	}
--- a/beacon-chain/blockchain/receive_block_test.go
+++ b/beacon-chain/blockchain/receive_block_test.go
@@ -6,22 +6,22 @@ import (
 	"testing"
 	"time"

-	blockchainTesting "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/voluntaryexits"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	blockchainTesting "github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain/testing"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/blstoexec"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/voluntaryexits"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 )

@@ -357,7 +357,7 @@ func TestHandleBlockBLSToExecutionChanges(t *testing.T) {
 		}
 		blk, err := blocks.NewBeaconBlock(pbb)
 		require.NoError(t, err)
-		require.NoError(t, service.handleBlockBLSToExecChanges(blk))
+		require.NoError(t, service.markIncludedBlockBLSToExecChanges(blk))
 	})

 	t.Run("Post Capella no changes", func(t *testing.T) {
@@ -367,7 +367,7 @@ func TestHandleBlockBLSToExecutionChanges(t *testing.T) {
 		}
 		blk, err := blocks.NewBeaconBlock(pbb)
 		require.NoError(t, err)
-		require.NoError(t, service.handleBlockBLSToExecChanges(blk))
+		require.NoError(t, service.markIncludedBlockBLSToExecChanges(blk))
 	})

 	t.Run("Post Capella some changes", func(t *testing.T) {
@@ -389,7 +389,7 @@ func TestHandleBlockBLSToExecutionChanges(t *testing.T) {

 		pool.InsertBLSToExecChange(signedChange)
 		require.Equal(t, true, pool.ValidatorExists(idx))
-		require.NoError(t, service.handleBlockBLSToExecChanges(blk))
+		require.NoError(t, service.markIncludedBlockBLSToExecChanges(blk))
 		require.Equal(t, false, pool.ValidatorExists(idx))
 	})
 }
--- a/beacon-chain/blockchain/service.go
+++ b/beacon-chain/blockchain/service.go
@@ -11,33 +11,33 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/async/event"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache/depositcache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
-	statefeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/execution"
-	f "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/blstoexec"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/slashings"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/voluntaryexits"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/p2p"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/config/features"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	prysmTime "github.com/prysmaticlabs/prysm/v3/time"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache/depositcache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed"
+	statefeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/execution"
+	f "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/blstoexec"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/slashings"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/voluntaryexits"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/p2p"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/config/features"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	prysmTime "github.com/prysmaticlabs/prysm/v4/time"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	"go.opencensus.io/trace"
 )

--- a/beacon-chain/blockchain/service_norace_test.go
+++ b/beacon-chain/blockchain/service_norace_test.go
@@ -5,10 +5,10 @@ import (
 	"io"
 	"testing"

-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
 	"github.com/sirupsen/logrus"
 )

--- a/beacon-chain/blockchain/service_test.go
+++ b/beacon-chain/blockchain/service_test.go
@@ -8,35 +8,35 @@ import (
 	"time"

 	"github.com/ethereum/go-ethereum/common"
-	"github.com/prysmaticlabs/prysm/v3/async/event"
-	mock "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache/depositcache"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/blocks"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
-	statefeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/transition"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/execution"
-	mockExecution "github.com/prysmaticlabs/prysm/v3/beacon-chain/execution/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/operations/attestations"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/p2p"
-	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state/stategen"
-	"github.com/prysmaticlabs/prysm/v3/config/features"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	consensusblocks "github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/container/trie"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
+	mock "github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain/testing"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache/depositcache"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/blocks"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed"
+	statefeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/transition"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/execution"
+	mockExecution "github.com/prysmaticlabs/prysm/v4/beacon-chain/execution/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/operations/attestations"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/p2p"
+	state_native "github.com/prysmaticlabs/prysm/v4/beacon-chain/state/state-native"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state/stategen"
+	"github.com/prysmaticlabs/prysm/v4/config/features"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	consensusblocks "github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/container/trie"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"google.golang.org/protobuf/proto"
 )
--- a/beacon-chain/blockchain/testing/BUILD.bazel
+++ b/beacon-chain/blockchain/testing/BUILD.bazel
@@ -4,7 +4,7 @@ go_library(
    name = "go_default_library",
    testonly = True,
    srcs = ["mock.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing",
+    importpath = "github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain/testing",
    visibility = [
        "//beacon-chain:__subpackages__",
        "//testing:__subpackages__",
@@ -20,11 +20,14 @@ go_library(
        "//beacon-chain/db:go_default_library",
        "//beacon-chain/forkchoice:go_default_library",
        "//beacon-chain/state:go_default_library",
+        "//beacon-chain/state/state-native:go_default_library",
        "//config/fieldparams:go_default_library",
        "//config/params:go_default_library",
        "//consensus-types/interfaces:go_default_library",
        "//consensus-types/primitives:go_default_library",
        "//encoding/bytesutil:go_default_library",
+        "//proto/engine/v1:go_default_library",
+        "//proto/eth/v1:go_default_library",
        "//proto/prysm/v1alpha1:go_default_library",
        "@com_github_pkg_errors//:go_default_library",
        "@com_github_sirupsen_logrus//:go_default_library",
--- a/beacon-chain/blockchain/testing/mock.go
+++ b/beacon-chain/blockchain/testing/mock.go
@@ -9,22 +9,25 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/async/event"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/epoch/precompute"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed"
-	blockfeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/block"
-	opfeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/operation"
-	statefeed "github.com/prysmaticlabs/prysm/v3/beacon-chain/core/feed/state"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/core/helpers"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/async/event"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/epoch/precompute"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed"
+	blockfeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/block"
+	opfeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/operation"
+	statefeed "github.com/prysmaticlabs/prysm/v4/beacon-chain/core/feed/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/core/helpers"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	state_native "github.com/prysmaticlabs/prysm/v4/beacon-chain/state/state-native"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	enginev1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	ethpbv1 "github.com/prysmaticlabs/prysm/v4/proto/eth/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	"github.com/sirupsen/logrus"
 )

@@ -65,11 +68,12 @@ type ChainService struct {
 	ReceiveBlockMockErr         error
 	OptimisticCheckRootReceived [32]byte
 	FinalizedRoots              map[[32]byte]bool
+	OptimisticRoots             map[[32]byte]bool
 }

-// ForkChoicer mocks the same method in the chain service
-func (s *ChainService) ForkChoicer() forkchoice.ForkChoicer {
-	return s.ForkChoiceStore
+func (s *ChainService) Ancestor(ctx context.Context, root []byte, slot primitives.Slot) ([]byte, error) {
+	r, err := s.ForkChoiceStore.AncestorRoot(ctx, bytesutil.ToBytes32(root), slot)
+	return r[:], err
 }

 // StateNotifier mocks the same method in the chain service.
@@ -455,11 +459,21 @@ func (s *ChainService) InForkchoice(_ [32]byte) bool {
 // IsOptimisticForRoot mocks the same method in the chain service.
 func (s *ChainService) IsOptimisticForRoot(_ context.Context, root [32]byte) (bool, error) {
 	s.OptimisticCheckRootReceived = root
-	return s.Optimistic, nil
+	return s.OptimisticRoots[root], nil
 }

 // UpdateHead mocks the same method in the chain service.
-func (s *ChainService) UpdateHead(_ context.Context) error { return nil }
+func (s *ChainService) UpdateHead(ctx context.Context, slot primitives.Slot) {
+	ojc := &ethpb.Checkpoint{}
+	st, root, err := prepareForkchoiceState(ctx, slot, bytesutil.ToBytes32(s.Root), [32]byte{}, [32]byte{}, ojc, ojc)
+	if err != nil {
+		logrus.WithError(err).Error("could not update head")
+	}
+	err = s.ForkChoiceStore.InsertNode(ctx, st, root)
+	if err != nil {
+		logrus.WithError(err).Error("could not insert node to forkchoice")
+	}
+}

 // ReceiveAttesterSlashing mocks the same method in the chain service.
 func (s *ChainService) ReceiveAttesterSlashing(context.Context, *ethpb.AttesterSlashing) {}
@@ -468,3 +482,108 @@ func (s *ChainService) ReceiveAttesterSlashing(context.Context, *ethpb.AttesterS
 func (s *ChainService) IsFinalized(_ context.Context, blockRoot [32]byte) bool {
 	return s.FinalizedRoots[blockRoot]
 }
+
+// prepareForkchoiceState prepares a beacon state with the given data to mock
+// insert into forkchoice
+func prepareForkchoiceState(
+	_ context.Context,
+	slot primitives.Slot,
+	blockRoot [32]byte,
+	parentRoot [32]byte,
+	payloadHash [32]byte,
+	justified *ethpb.Checkpoint,
+	finalized *ethpb.Checkpoint,
+) (state.BeaconState, [32]byte, error) {
+	blockHeader := &ethpb.BeaconBlockHeader{
+		ParentRoot: parentRoot[:],
+	}
+
+	executionHeader := &enginev1.ExecutionPayloadHeader{
+		BlockHash: payloadHash[:],
+	}
+
+	base := &ethpb.BeaconStateBellatrix{
+		Slot:                         slot,
+		RandaoMixes:                  make([][]byte, params.BeaconConfig().EpochsPerHistoricalVector),
+		BlockRoots:                   make([][]byte, 1),
+		CurrentJustifiedCheckpoint:   justified,
+		FinalizedCheckpoint:          finalized,
+		LatestExecutionPayloadHeader: executionHeader,
+		LatestBlockHeader:            blockHeader,
+	}
+
+	base.BlockRoots[0] = append(base.BlockRoots[0], blockRoot[:]...)
+	st, err := state_native.InitializeFromProtoBellatrix(base)
+	return st, blockRoot, err
+}
+
+// CachedHeadRoot mocks the same method in the chain service
+func (s *ChainService) CachedHeadRoot() [32]byte {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.CachedHeadRoot()
+	}
+	return [32]byte{}
+}
+
+// GetProposerHead mocks the same method in the chain service
+func (s *ChainService) GetProposerHead() [32]byte {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.GetProposerHead()
+	}
+	return [32]byte{}
+}
+
+// SetForkchoiceGenesisTime mocks the same method in the chain service
+func (s *ChainService) SetForkChoiceGenesisTime(timestamp uint64) {
+	if s.ForkChoiceStore != nil {
+		s.ForkChoiceStore.SetGenesisTime(timestamp)
+	}
+}
+
+// ReceivedBlocksLastEpoch mocks the same method in the chain service
+func (s *ChainService) ReceivedBlocksLastEpoch() (uint64, error) {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.ReceivedBlocksLastEpoch()
+	}
+	return 0, nil
+}
+
+// HighestReceivedBlockSlot mocks the same method in the chain service
+func (s *ChainService) HighestReceivedBlockSlot() primitives.Slot {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.HighestReceivedBlockSlot()
+	}
+	return 0
+}
+
+// InsertNode mocks the same method in the chain service
+func (s *ChainService) InsertNode(ctx context.Context, st state.BeaconState, root [32]byte) error {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.InsertNode(ctx, st, root)
+	}
+	return nil
+}
+
+// ForkChoiceDump mocks the same method in the chain service
+func (s *ChainService) ForkChoiceDump(ctx context.Context) (*ethpbv1.ForkChoiceDump, error) {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.ForkChoiceDump(ctx)
+	}
+	return nil, nil
+}
+
+// NewSlot mocks the same method in the chain service
+func (s *ChainService) NewSlot(ctx context.Context, slot primitives.Slot) error {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.NewSlot(ctx, slot)
+	}
+	return nil
+}
+
+// ProposerBoost mocks the same method in the chain service
+func (s *ChainService) ProposerBoost() [32]byte {
+	if s.ForkChoiceStore != nil {
+		return s.ForkChoiceStore.ProposerBoost()
+	}
+	return [32]byte{}
+}
--- a/beacon-chain/blockchain/weak_subjectivity_checks.go
+++ b/beacon-chain/blockchain/weak_subjectivity_checks.go
@@ -5,12 +5,12 @@ import (
 	"fmt"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db/filters"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db/filters"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )

 type weakSubjectivityDB interface {
--- a/beacon-chain/blockchain/weak_subjectivity_checks_test.go
+++ b/beacon-chain/blockchain/weak_subjectivity_checks_test.go
@@ -5,16 +5,16 @@ import (
 	"testing"

 	"github.com/pkg/errors"
-	testDB "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	doublylinkedtree "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/doubly-linked-tree"
-	forkchoicetypes "github.com/prysmaticlabs/prysm/v3/beacon-chain/forkchoice/types"
-	fieldparams "github.com/prysmaticlabs/prysm/v3/config/fieldparams"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
-	"github.com/prysmaticlabs/prysm/v3/testing/util"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	testDB "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	doublylinkedtree "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/doubly-linked-tree"
+	forkchoicetypes "github.com/prysmaticlabs/prysm/v4/beacon-chain/forkchoice/types"
+	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/testing/util"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )

 func TestService_VerifyWeakSubjectivityRoot(t *testing.T) {
@@ -78,7 +78,7 @@ func TestService_VerifyWeakSubjectivityRoot(t *testing.T) {
 				wsVerifier: wv,
 			}
 			require.NoError(t, fcs.UpdateFinalizedCheckpoint(&forkchoicetypes.Checkpoint{Epoch: tt.finalizedEpoch}))
-			cp := s.ForkChoicer().FinalizedCheckpoint()
+			cp := s.cfg.ForkChoiceStore.FinalizedCheckpoint()
 			err = s.wsVerifier.VerifyWeakSubjectivity(context.Background(), cp.Epoch)
 			if tt.wantErr == nil {
 				require.NoError(t, err)
--- a/beacon-chain/builder/BUILD.bazel
+++ b/beacon-chain/builder/BUILD.bazel
@@ -7,7 +7,7 @@ go_library(
        "option.go",
        "service.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/beacon-chain/builder",
+    importpath = "github.com/prysmaticlabs/prysm/v4/beacon-chain/builder",
    visibility = ["//visibility:public"],
    deps = [
        "//api/client/builder:go_default_library",
--- a/beacon-chain/builder/option.go
+++ b/beacon-chain/builder/option.go
@@ -1,10 +1,10 @@
 package builder

 import (
-	"github.com/prysmaticlabs/prysm/v3/api/client/builder"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
-	"github.com/prysmaticlabs/prysm/v3/cmd/beacon-chain/flags"
+	"github.com/prysmaticlabs/prysm/v4/api/client/builder"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	"github.com/prysmaticlabs/prysm/v4/cmd/beacon-chain/flags"
 	"github.com/urfave/cli/v2"
 )

--- a/beacon-chain/builder/service.go
+++ b/beacon-chain/builder/service.go
@@ -6,13 +6,13 @@ import (
 	"time"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/api/client/builder"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/db"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/api/client/builder"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/db"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	log "github.com/sirupsen/logrus"
 	"go.opencensus.io/trace"
 )
--- a/beacon-chain/builder/service_test.go
+++ b/beacon-chain/builder/service_test.go
@@ -4,13 +4,13 @@ import (
 	"context"
 	"testing"

-	buildertesting "github.com/prysmaticlabs/prysm/v3/api/client/builder/testing"
-	blockchainTesting "github.com/prysmaticlabs/prysm/v3/beacon-chain/blockchain/testing"
-	dbtesting "github.com/prysmaticlabs/prysm/v3/beacon-chain/db/testing"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	eth "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	buildertesting "github.com/prysmaticlabs/prysm/v4/api/client/builder/testing"
+	blockchainTesting "github.com/prysmaticlabs/prysm/v4/beacon-chain/blockchain/testing"
+	dbtesting "github.com/prysmaticlabs/prysm/v4/beacon-chain/db/testing"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	eth "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func Test_NewServiceWithBuilder(t *testing.T) {
--- a/beacon-chain/builder/testing/BUILD.bazel
+++ b/beacon-chain/builder/testing/BUILD.bazel
@@ -4,7 +4,7 @@ go_library(
    name = "go_default_library",
    testonly = True,
    srcs = ["mock.go"],
-    importpath = "github.com/prysmaticlabs/prysm/v3/beacon-chain/builder/testing",
+    importpath = "github.com/prysmaticlabs/prysm/v4/beacon-chain/builder/testing",
    visibility = ["//visibility:public"],
    deps = [
        "//api/client/builder:go_default_library",
--- a/beacon-chain/builder/testing/mock.go
+++ b/beacon-chain/builder/testing/mock.go
@@ -5,14 +5,14 @@ import (
 	"math/big"

 	"github.com/pkg/errors"
-	"github.com/prysmaticlabs/prysm/v3/api/client/builder"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/blocks"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/interfaces"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	v1 "github.com/prysmaticlabs/prysm/v3/proto/engine/v1"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/time/slots"
+	"github.com/prysmaticlabs/prysm/v4/api/client/builder"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/blocks"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/interfaces"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	v1 "github.com/prysmaticlabs/prysm/v4/proto/engine/v1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/time/slots"
 )

 // MockBuilderService to mock builder.
--- a/beacon-chain/cache/BUILD.bazel
+++ b/beacon-chain/cache/BUILD.bazel
@@ -24,7 +24,7 @@ go_library(
        "sync_committee_head_state.go",
        "sync_subnet_ids.go",
    ],
-    importpath = "github.com/prysmaticlabs/prysm/v3/beacon-chain/cache",
+    importpath = "github.com/prysmaticlabs/prysm/v4/beacon-chain/cache",
    visibility = [
        "//beacon-chain:__subpackages__",
        "//testing/spectest:__subpackages__",
--- a/beacon-chain/cache/active_balance.go
+++ b/beacon-chain/cache/active_balance.go
@@ -10,10 +10,10 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	lruwrpr "github.com/prysmaticlabs/prysm/v3/cache/lru"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	lruwrpr "github.com/prysmaticlabs/prysm/v4/cache/lru"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
 )

 const (
--- a/beacon-chain/cache/active_balance_disabled.go
+++ b/beacon-chain/cache/active_balance_disabled.go
@@ -6,7 +6,7 @@ import (
 	"sync"

 	lru "github.com/hashicorp/golang-lru"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
 )

 // FakeBalanceCache is a fake struct with 1 LRU cache for looking up balance by epoch.
--- a/beacon-chain/cache/active_balance_test.go
+++ b/beacon-chain/cache/active_balance_test.go
@@ -7,11 +7,11 @@ import (
 	"math"
 	"testing"

-	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	state_native "github.com/prysmaticlabs/prysm/v4/beacon-chain/state/state-native"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 )

 func TestBalanceCache_AddGetBalance(t *testing.T) {
--- a/beacon-chain/cache/attestation_data.go
+++ b/beacon-chain/cache/attestation_data.go
@@ -10,7 +10,7 @@ import (

 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	"k8s.io/client-go/tools/cache"
 )

--- a/beacon-chain/cache/attestation_data_test.go
+++ b/beacon-chain/cache/attestation_data_test.go
@@ -4,9 +4,9 @@ import (
 	"context"
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/cache"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/cache"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
 	"google.golang.org/protobuf/proto"
 )

--- a/beacon-chain/cache/checkpoint_state.go
+++ b/beacon-chain/cache/checkpoint_state.go
@@ -4,10 +4,10 @@ import (
 	lru "github.com/hashicorp/golang-lru"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promauto"
-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	lruwrpr "github.com/prysmaticlabs/prysm/v3/cache/lru"
-	"github.com/prysmaticlabs/prysm/v3/crypto/hash"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	lruwrpr "github.com/prysmaticlabs/prysm/v4/cache/lru"
+	"github.com/prysmaticlabs/prysm/v4/crypto/hash"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 )

 var (
--- a/beacon-chain/cache/checkpoint_state_test.go
+++ b/beacon-chain/cache/checkpoint_state_test.go
@@ -3,14 +3,14 @@ package cache
 import (
 	"testing"

-	"github.com/prysmaticlabs/prysm/v3/beacon-chain/state"
-	state_native "github.com/prysmaticlabs/prysm/v3/beacon-chain/state/state-native"
-	"github.com/prysmaticlabs/prysm/v3/config/params"
-	"github.com/prysmaticlabs/prysm/v3/consensus-types/primitives"
-	"github.com/prysmaticlabs/prysm/v3/encoding/bytesutil"
-	ethpb "github.com/prysmaticlabs/prysm/v3/proto/prysm/v1alpha1"
-	"github.com/prysmaticlabs/prysm/v3/testing/assert"
-	"github.com/prysmaticlabs/prysm/v3/testing/require"
+	"github.com/prysmaticlabs/prysm/v4/beacon-chain/state"
+	state_native "github.com/prysmaticlabs/prysm/v4/beacon-chain/state/state-native"
+	"github.com/prysmaticlabs/prysm/v4/config/params"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
+	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v4/testing/assert"
+	"github.com/prysmaticlabs/prysm/v4/testing/require"
 	"google.golang.org/protobuf/proto"
 )

--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Nishant Das	191e603e28	Fix Bad Merge in V4 (#12183 )	2023-03-24 14:05:31 +00:00
Nishant Das	76c729f9fa	Add Pubsub Metrics Tracer (#12178 ) * add tracer * gaz * preston's review * preston's review	2023-03-24 12:36:10 +08:00
Potuz	797cc360c7	Isolate forkchoice to blockchain package (#12174 ) * Isolate Forkchoice to blockchain package * Nishant's feedback * Terence's feedback * Nishant saving the day	2023-03-22 09:12:54 +08:00
terencechain	79da486508	Add locks to forkchoice spec tests (#12165 ) * Add locks to forkchoice spec testS * Fix * Rm forkchoice store getter * Rm useless lock	2023-03-21 18:39:40 +00:00
terencechain	5bb1491d8f	Remove blob protos (#12173 ) * Remove old protobufs * Rm generated files --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-21 18:08:05 +00:00
Patrice Vignola	c0ee781638	Remove unused validator endpoints from validator REST API (#12167 ) Co-authored-by: Radosław Kapka <rkapka@wp.pl>	2023-03-21 16:52:42 +00:00
shana	4d5827c527	Fix payload attributes json (#12169 ) Co-authored-by: terencechain <terence@prysmaticlabs.com>	2023-03-21 13:36:18 +00:00
Nishant Das	88f03967dd	Apply Goimports to Generated Files (#12170 ) * gofmt * build	2023-03-21 11:12:23 +00:00
Potuz	fb65287ba2	Remove unused methods from interface (#12164 )	2023-03-20 15:36:33 -05:00
Radosław Kapka	0cb46eb29a	Do not HTR the state when checking for optimistic mode (#12143 ) * initial impl * review feedback * fix tests * review feedback * some improvements * tests and small improvements * gzl * one more review * fix test * fix other test * get the roots instead of hashing them * fix comment * fix justified case * fix all tests * misc * gzl * fix broken tests * use isOptimisticForRoot once we have the blockroot * Fix is_not_finalized_when_head_is_optimistic but reviewing the logic first * Fix is_not_finalized_when_head_is_optimistic * better root tests * move optimistic check before parsing root * check for last validated checkpoint * add right check for finalized * fix finalized tests * removed impossible condition * fix TestGetSyncCommitteeDuties * Use Ancestor from chaininfo * fix test --------- Co-authored-by: Potuz <potuz@prysmaticlabs.com> Co-authored-by: Nishant Das <nishdas93@gmail.com> Co-authored-by: rauljordan <raul@prysmaticlabs.com> Co-authored-by: terence tsao <terence@prysmaticlabs.com>	2023-03-20 17:04:40 -03:00
Potuz	abe9e7fa7e	mainnet capella epoch (#12144 ) * mainnet capella epoch * Update spec test to v1.3.0-rc5 --------- Co-authored-by: terence tsao <terence@prysmaticlabs.com> Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-20 19:18:58 +00:00
Potuz	3536669a70	lock forkchoice on calls to Ancestor (#12162 ) Co-authored-by: terencechain <terence@prysmaticlabs.com>	2023-03-20 15:51:42 -03:00
Patrice Vignola	7c49277e83	Add REST API stubs for beacon chain, node and slasher clients (#12094 ) * WIP * WIP * Remove duplicate mock * WIP * Revert "WIP" This reverts commit `a8010057fe`. * Fix build break * Remove unused variable * Fix build break * Rename validator_mock to validatormock * Fix failing test --------- Co-authored-by: james-prysm <90280386+james-prysm@users.noreply.github.com> Co-authored-by: Radosław Kapka <rkapka@wp.pl>	2023-03-20 16:32:32 +00:00
terencechain	6480d5a0fd	Send missing slot event at the correct place (#12160 )	2023-03-19 16:25:58 -07:00
Potuz	d1c45b44be	Call FCU at 4 seconds if we haven't updated head (#12159 )	2023-03-19 00:21:52 +00:00
Nishant Das	2a1c626707	Add Flags To Dev Mode (#12152 ) Co-authored-by: terencechain <terence@prysmaticlabs.com>	2023-03-17 23:01:23 +00:00
james-prysm	67595d576c	fixing SSE payloads (#12154 ) * fixing typo on casing * WIP get missed slot * missed in commit * reverting changes onfeedback * reverting bazel * using the current or head slots for events * fixing linting * use emitSlot * fixing time and preRando change * updating based on feedback * fixing linting * clarifying variable * removing useless if statement * fixing function to use the current slot+1 * updating based on feedback * fixing unit tests * missed dependency injection * fixing linting	2023-03-17 14:25:36 -05:00
terencechain	d17996f8b0	Update to `V4` 🚀 (#12134 ) * Update V3 from V4 * Fix build v3 -> v4 * Update ssz * Update beacon_chain.pb.go * Fix formatter import * Update update-mockgen.sh comment to v4 * Fix conflicts. Pass build and tests * Fix test	2023-03-17 18:52:56 +00:00
terencechain	7d82a0510f	Fix typos from bls pool metric PR (#12155 )	2023-03-17 16:00:07 +00:00
Nishant Das	3072b17329	Fully Deprecate Batch Aggregation Flag (#12151 ) * fix evaluator * fmt * config	2023-03-17 12:09:28 +00:00
Nishant Das	e58b66f76d	Fully Deprecate Vectorized HTR Flag (#12148 ) * cleanup * gaz * fix tests * remove unused hasher * gaz * fix last one * fix tests * fmt	2023-03-17 11:41:02 +00:00
Nishant Das	a937d78711	Remove Disable Flag For Doubly Linked Tree (#12141 ) * deprecate * remove this as the feature never worked * fix	2023-03-17 11:08:05 +00:00
Nishant Das	5243ca7d64	Deprecate Reorg Flag Correctly (#12147 ) Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-17 10:26:58 +00:00
Nishant Das	04b0a84de1	Disable E2E Run For Slasher (#12150 ) * fix evaluator * fix tests	2023-03-17 10:08:56 +00:00
Potuz	5beb5e8912	Invert reorg of late blocks flag (#12146 ) * Invert reorg of late blocks flag * add flag to beacon node	2023-03-16 22:44:24 -03:00
Potuz	99997fa2e3	forkchoice changes (#12126 ) * forkchoice changes * gazelle * remove best justified from forkchoice dump * keep protobufs and update comment * remove phase0 tests * bumb spectests version * missing sha * Fix sha256 for spec * rpc tests * Mark field 3 as reserved so it will never be used it again --------- Co-authored-by: terence tsao <terence@prysmaticlabs.com> Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com>	2023-03-16 14:27:30 -03:00
Nishant Das	5ea6e32d6c	Remove Deprecated HTTP Provider Flag (#12140 ) * remove deprecated http provider flag * test --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-16 12:15:02 +00:00
Nishant Das	ab407809f0	Remove Deprecated Flags (#12139 )	2023-03-16 11:54:02 +00:00
Nishant Das	4d28d69fd9	Make Peer Scorer Permanent Default (#12138 ) * add changes * gaz * fix	2023-03-16 18:52:49 +08:00
Patrice Vignola	3802761088	Fix the `TestEndToEnd_Slasher_MinimalConfig` test (#12116 ) * WIP * WIP * WIP --------- Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com> Co-authored-by: Radosław Kapka <rkapka@wp.pl>	2023-03-15 19:15:46 +00:00
terencechain	2669c93375	Add bls pool metric (#12133 ) * Add metric gauge for bls to exec pool count * Fix * Fix * Gazelle	2023-03-15 14:12:21 +00:00
Patrice Vignola	ce32453c7b	Remove unused beacon chain altair mocks (#12095 ) Co-authored-by: Radosław Kapka <rkapka@wp.pl>	2023-03-15 13:12:34 +00:00
Nishant Das	ee8cb8bd6f	Update Pubsub Library (#12132 ) Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-15 12:51:42 +00:00
Sammy Rosso	be4ef54482	Prysmctl add eth1Data to genesis state (#12125 ) * Add Eth1Data to genesis state * James' review * Nishant' review	2023-03-15 20:31:57 +08:00
james-prysm	0c025ab719	prysmctl: fix withdrawals fork checking logic (#12130 ) * coded based on suggestions from slack * fixing linting * removing unused flags and space * small improvement to log	2023-03-15 12:32:11 +08:00
james-prysm	b180a7de81	Prysm V4: SSE api adding payload_attributes (#12102 )	2023-03-14 19:04:31 -07:00
terencechain	5c234c8c68	Mark GetChainHead deprecated (#12128 ) * Mark GetChainHead deprecated * Add deprecation notice to protobuf definition * Update proto/prysm/v1alpha1/beacon_chain.proto Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com> * Update beacon_chain.pb.go --------- Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com> Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-14 21:06:34 +00:00
james-prysm	f92d492e33	use headblock for prunePostBlockOperationPools, remove duplicate markInclusionBLStoExecutionChange calls (#12085 ) * removing duplicate function * moved markInclusion for bls to use headblock instead of processed block * updating based on internal feedback * addressing some comments * addressing feedback from slack * fixing conflict * making changes based on suggestions on slack * reverting a change * making chases based on potuz's comments * removing one additional block copy * clarifying comments	2023-03-14 15:23:11 -05:00
int88	a926028e45	fix error message in TestStateSummary_CanDelete (#12123 ) Co-authored-by: Preston Van Loon <preston@prysmaticlabs.com>	2023-03-14 18:17:32 +00:00
Sammy Rosso	49f0c44dfe	Add getpayloadbodies (#11973 ) * el payload bodies code * Add getPayloadBodies * Add error 38004 * Add unmarshal * Add ExecutionPayloadBodyV1 to proto * Add EnableCapellaEngineMethods flag * Small fixes * Add proto files * gazelle * passing tests * compile * Add remaining tests * fix tests * Cleanup * Fix gazelle * Remove comments * Rename the flag + add missing description --------- Co-authored-by: rauljordan <raul@prysmaticlabs.com> Co-authored-by: terencechain <terence@prysmaticlabs.com>	2023-03-14 15:52:16 +00:00
Sammy Rosso	8aec170f9b	Eip4881: Tests (#11754 )	2023-03-14 08:29:48 -07:00
Nishant Das	cc764c346b	Run Altair Fork Transition (#12124 )	2023-03-14 13:59:26 +00:00
james-prysm	7d5d30ac94	validator startup deadline bug (#12049 ) * trying fix for validator startup deadline * updating deadline duration to be set by params * adding a runner test * trying nishant's suggestion * editing based on review feedback * reverting a change * fixing epoch deadline * reverting aliasing	2023-03-14 12:52:56 +08:00
Preston Van Loon	f6eb42b761	Update bazel to 6.1.0 (#12121 ) * Update references for cc toolchain after removal of @bazel_tools//cpp/cc_toolchain_config.bzl in `1727361563` * Update to bazel 6.1.0 * Update cross-toolchain configs	2023-03-13 23:17:26 +00:00
Preston Van Loon	39fe29d8f4	Replace @bazel pkg_tar rule with canonical @rules_pkg pkg_tar (#12120 ) * Replace @bazel pkg_tar rule with canonical @rules_pkg pkg_tar * gazelle on workspace	2023-03-13 20:17:12 +00:00
Preston Van Loon	81fbfceea8	Update rules_go to v0.38.1 and go_version to 1.19.7 (#12055 ) * Update rules_go to v0.38.1 * Bump go version --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-13 19:22:37 +00:00
Preston Van Loon	a0ff5ff792	Only build non-test targets in hack/update-go-pbs.sh (#12101 ) * Only build non-test targets in hack/update-go-pbs.sh * run ./hack/update-go-pbs.sh * Add ability to pass config to bazel --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-10 17:49:34 +00:00
Potuz	4528ea8d0d	Gate GetProposerHead behind the feature flag (#12110 ) Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-10 17:20:01 +00:00
terencechain	00b9e484e5	Cleanups from eip4844 branch (#12109 ) * Minor cleanups from eip4844 branch * Add back handler * Fix gazelle * More fixes * More fixes --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-10 16:46:27 +00:00
Preston Van Loon	5eaa152589	Bazel: fix remote cache uploads (#12108 )	2023-03-10 00:24:37 +00:00
Potuz	6d3ff65635	increase attempted reorgs at the right spot (#12106 )	2023-03-09 15:06:46 +00:00
Marius van der Wijden	83a294c1a5	go.mod: set a non-zero version for tx-fuzz (#12098 ) * go.mod: set a non-zero version for tx-fuzz * go.mod: use upstream tx-fuzz instead of fork * run gazelle * fix tests --------- Co-authored-by: nisdas <nishdas93@gmail.com> Co-authored-by: Preston Van Loon <pvanloon@offchainlabs.com>	2023-03-09 09:23:45 +00:00
james-prysm	753e285fb6	Prysm V4: Remove Prysm Remote Signer (#11895 ) * removing all prysm remote signer code * fixing unit tests * resolving more build issues * resolving deepsource complaint * fixing lint * trying to fix bazel library * trying testonly true * removing assert and require from non test settings * fixing bazel and tests * removing more unused files related to remote signer * fixing linting * reverting some changes * reverting a change that broke some code * removing typo * fixing unit test * fixing mnemonic information	2023-03-08 21:21:12 -06:00
Potuz	525d3b05a6	Late block reorgs metrics and logs (#12097 ) * Late block reorgs metrics and logs * tests * mixed thresholds * use threshold variables * use infof --------- Co-authored-by: terencechain <terence@prysmaticlabs.com>	2023-03-09 01:51:50 +00:00
Nishant Das	4f38ba38b7	Update Libp2p (#12096 ) * update deps * add preston's fix * fix build * gaz * test fixes	2023-03-08 23:52:51 +08:00
Potuz	eb0b5a6146	Do not call repeated times FCU (#12091 ) * Do not call repeated times FCU * cleanup * only log if prune attestations fail	2023-03-08 09:36:46 -03:00
Preston Van Loon	4356cbc352	Update cross compile toolchains (#12069 ) * Regenerate cross-toolchain configs * Remove some extra whitespaces * Run gazelle and add that note to the README * Format numbered lists better in markdown * gcloud docker command is deprecated, just use docker * Add comment about docker credentials for gcr.io * Update dockerfile, some remote executor config work * gazelle * Remove commented lines --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-07 20:09:46 +00:00
kasey	0893821e35	Disable conditional go 1.20 code until module is also at 1.20 (#12084 ) * disable conditional go 1.20 code until we upgrade * bazel decided this was unreachable and removed it! --------- Co-authored-by: kasey <kasey@users.noreply.github.com>	2023-03-07 16:25:35 +00:00
Bret	c3346fefa7	Fix log messages (#12086 ) These two log messages were appending a `d` to the hash. When compared to the other hash, they matched up until the `d` Co-authored-by: james-prysm <90280386+james-prysm@users.noreply.github.com>	2023-03-07 07:16:39 +00:00
Nishant Das	d639a26bbe	Fix E2E Flakes (#12074 ) * fix flakes * make it longer * make it less to prevent triggering of other issues --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-07 04:15:51 +00:00
Potuz	bb95d951cc	Use Epoch boundary cache to retrieve balances (#12083 ) * Use Epoch boundary cache to retrieve balances * save boundary states before inserting to forkchoice * move up last block save * remove boundary checks on balances * fix ordering --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-06 21:42:47 +00:00
terencechain	78d49fda13	Minor cleanup to forkchoice pkg (#12078 ) * Minor cleanup to forkchoice pkg * Rm implementation --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-06 17:01:36 +00:00
Nishant Das	3aaba7c065	Remove Feature Flag From Prater (#12082 )	2023-03-06 09:56:53 +00:00
terencechain	b8a1bcdfe3	Circuit breaker: lower max builder epoch missed slots to 5 (#12076 ) * Circuit breaker: lower max builder epoch missed slots to 5 * Change equality to >= * Fix tests --------- Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>	2023-03-05 19:10:41 +00:00
Potuz	93514de00f	Proposer head v5 (#12075 ) * Use ShouldOverrideFCU in regular sync * fix build * fix tests * add feature flag gate in updatehead * fix rpc tests * fix grcp tests * deepsource * add locks and reuse isNewProposer * flip flag * Fix ticker for late blocks * implement get_proposer_head in GetBeaconBlock * fix unit tests	2023-03-04 20:19:23 -03:00
@@ -1 +1 @@
 .3.0
 .1.0