Merge branch 'develop' into simplify-parse-beacon-block

**What type of PR is this?**

Documentation

**What does this PR do? Why is it needed?**

* Move the ethspecify config from `/specrefs/.ethspecify` to
`/.ethspecify`.
* This allows developers to use inline specrefs (eg spec functions in
godoc comments).
* To do this, simply add a spec tag and run `ethspecify` to populate it.
* Clean up specref exceptions; organize by upgrade & put items in the
correct section.
* Update a few godoc comments to use the new inline specref feature.
* Update check-specrefs GitHub action so that it enforces up-to-date
godocs.
* Standardize specref naming; requiring a `#fork` tag for everything.
* Add new specrefs (which haven't been implemented yet) which were
missing.

**Acknowledgements**

- [x] I have read
[CONTRIBUTING.md](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md).
- [x] I have included a uniquely named [changelog fragment
file](https://github.com/prysmaticlabs/prysm/blob/develop/CONTRIBUTING.md#maintaining-changelogmd).
- [x] I have added a description with sufficient context for reviewers
to understand this PR.
- [x] I have tested that my changes work as expected and I added a
testing plan to the PR description (if applicable).

---------

Co-authored-by: james-prysm <90280386+james-prysm@users.noreply.github.com>

.ethspecify.yml

@@ -2,24 +2,38 @@ version: v1.7.0-alpha.1
 style: full
 
 specrefs:
-  search_root: ..
+  search_root: .
+  auto_standardize_names: true
+  auto_add_missing_entries: true
+  require_exceptions_have_fork: true
+
   files:
-    - configs.yml
-    - constants.yml
-    - containers.yml
-    - dataclasses.yml
-    - functions.yml
-    - presets.yml
+    - specrefs/configs.yml
+    - specrefs/constants.yml
+    - specrefs/containers.yml
+    - specrefs/dataclasses.yml
+    - specrefs/functions.yml
+    - specrefs/presets.yml
 
 exceptions:
   presets:
-    # Not implemented: gloas (future fork)
+    # gloas
     - BUILDER_PENDING_WITHDRAWALS_LIMIT#gloas
     - MAX_PAYLOAD_ATTESTATIONS#gloas
     - PTC_SIZE#gloas
 
   constants:
-    # Constants in the KZG library
+    # phase0
+    - BASIS_POINTS#phase0
+    - ENDIANNESS#phase0
+    - MAX_CONCURRENT_REQUESTS#phase0
+    - UINT64_MAX#phase0
+    - UINT64_MAX_SQRT#phase0
+    # altair
+    - PARTICIPATION_FLAG_WEIGHTS#altair
+    # bellatrix
+    - SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY#bellatrix
+    # deneb
     - BLS_MODULUS#deneb
     - BYTES_PER_COMMITMENT#deneb
     - BYTES_PER_FIELD_ELEMENT#deneb
@@ -33,18 +47,9 @@ exceptions:
     - PRIMITIVE_ROOT_OF_UNITY#deneb
     - RANDOM_CHALLENGE_KZG_BATCH_DOMAIN#deneb
     - RANDOM_CHALLENGE_KZG_CELL_BATCH_DOMAIN#fulu
-
-    # Not implemented
-    - BASIS_POINTS#phase0
-    - ENDIANNESS#phase0
-    - MAX_CONCURRENT_REQUESTS#phase0
-    - PARTICIPATION_FLAG_WEIGHTS#altair
-    - SAFE_SLOTS_TO_IMPORT_OPTIMISTICALLY#bellatrix
+    # fulu
     - UINT256_MAX#fulu
-    - UINT64_MAX#phase0
-    - UINT64_MAX_SQRT#phase0
-
-    # Not implemented: gloas (future fork)
+    # gloas
     - BUILDER_PAYMENT_THRESHOLD_DENOMINATOR#gloas
     - BUILDER_PAYMENT_THRESHOLD_NUMERATOR#gloas
     - BUILDER_WITHDRAWAL_PREFIX#gloas
@@ -61,61 +66,62 @@ exceptions:
     - PTC_TIMELINESS_INDEX#gloas
 
   configs:
-    # Not implemented: gloas (future fork)
+    # gloas
     - AGGREGATE_DUE_BPS_GLOAS#gloas
     - ATTESTATION_DUE_BPS_GLOAS#gloas
     - CONTRIBUTION_DUE_BPS_GLOAS#gloas
     - GLOAS_FORK_EPOCH#gloas
     - GLOAS_FORK_VERSION#gloas
     - MAX_REQUEST_PAYLOADS#gloas
+    - MIN_BUILDER_WITHDRAWABILITY_DELAY#gloas
     - PAYLOAD_ATTESTATION_DUE_BPS#gloas
     - SYNC_MESSAGE_DUE_BPS_GLOAS#gloas
-    - MIN_BUILDER_WITHDRAWABILITY_DELAY#gloas
 
   ssz_objects:
-    # Not implemented
+    # phase0
     - Eth1Block#phase0
-    - MatrixEntry#fulu
-
-    # Not implemented: capella
+    # capella
     - LightClientBootstrap#capella
     - LightClientFinalityUpdate#capella
     - LightClientOptimisticUpdate#capella
     - LightClientUpdate#capella
-
-    # Not implemented: gloas (future fork)
+    # fulu
+    - MatrixEntry#fulu
+    # gloas
     - BeaconBlockBody#gloas
     - BeaconState#gloas
+    - Builder#gloas
     - BuilderPendingPayment#gloas
     - BuilderPendingWithdrawal#gloas
     - DataColumnSidecar#gloas
-    - ExecutionPayloadEnvelope#gloas
     - ExecutionPayloadBid#gloas
+    - ExecutionPayloadEnvelope#gloas
     - ForkChoiceNode#gloas
     - IndexedPayloadAttestation#gloas
     - PayloadAttestation#gloas
     - PayloadAttestationData#gloas
     - PayloadAttestationMessage#gloas
-    - SignedExecutionPayloadEnvelope#gloas
-    - SignedExecutionPayloadBid#gloas
-    - Builder#gloas
     - ProposerPreferences#gloas
+    - SignedExecutionPayloadBid#gloas
+    - SignedExecutionPayloadEnvelope#gloas
     - SignedProposerPreferences#gloas
 
   dataclasses:
-    # Not implemented
-    - BlobParameters#fulu
-    - ExpectedWithdrawals#capella
-    - ExpectedWithdrawals#electra
+    # phase0
     - LatestMessage#phase0
-    - LightClientStore#altair
-    - OptimisticStore#bellatrix
     - Store#phase0
-
-    # Not implemented: capella
+    # altair
+    - LightClientStore#altair
+    # bellatrix
+    - OptimisticStore#bellatrix
+    # capella
+    - ExpectedWithdrawals#capella
     - LightClientStore#capella
-
-    # Not implemented: gloas (future fork)
+    # electra
+    - ExpectedWithdrawals#electra
+    # fulu
+    - BlobParameters#fulu
+    # gloas
     - ExpectedWithdrawals#gloas
     - LatestMessage#gloas
     - Store#gloas
@@ -175,7 +181,12 @@ exceptions:
     - verify_cell_kzg_proof_batch#fulu
     - verify_cell_kzg_proof_batch_impl#fulu
 
-    # Not implemented: phase0
+    # phase0
+    - update_proposer_boost_root#phase0
+    - is_proposer_equivocation#phase0
+    - record_block_timeliness#phase0
+    - compute_proposer_score#phase0
+    - get_attestation_score#phase0
     - calculate_committee_fraction#phase0
     - compute_fork_version#phase0
     - compute_pulled_up_tip#phase0
@@ -221,8 +232,7 @@ exceptions:
     - validate_on_attestation#phase0
     - validate_target_epoch_against_current_time#phase0
     - xor#phase0
-
-    # Not implemented: altair
+    # altair
     - compute_merkle_proof#altair
     - compute_sync_committee_period_at_slot#altair
     - get_contribution_and_proof#altair
@@ -244,27 +254,29 @@ exceptions:
     - process_sync_committee_contributions#altair
     - set_or_append_list#altair
     - validate_light_client_update#altair
-
-    # Not implemented: bellatrix
+    # bellatrix
     - get_execution_payload#bellatrix
     - is_merge_transition_block#bellatrix
     - is_optimistic_candidate_block#bellatrix
     - latest_verified_ancestor#bellatrix
     - prepare_execution_payload#bellatrix
-
-    # Not implemented: capella
+    # capella
+    - apply_withdrawals#capella
+    - get_balance_after_withdrawals#capella
     - get_lc_execution_root#capella
+    - get_validators_sweep_withdrawals#capella
     - is_valid_light_client_header#capella
     - prepare_execution_payload#capella
     - process_epoch#capella
+    - update_next_withdrawal_index#capella
+    - update_next_withdrawal_validator_index#capella
     - upgrade_lc_bootstrap_to_capella#capella
     - upgrade_lc_finality_update_to_capella#capella
     - upgrade_lc_header_to_capella#capella
     - upgrade_lc_optimistic_update_to_capella#capella
     - upgrade_lc_store_to_capella#capella
     - upgrade_lc_update_to_capella#capella
-
-    # Not implemented: deneb
+    # deneb
     - get_lc_execution_root#deneb
     - is_valid_light_client_header#deneb
     - prepare_execution_payload#deneb
@@ -274,33 +286,34 @@ exceptions:
     - upgrade_lc_optimistic_update_to_deneb#deneb
     - upgrade_lc_store_to_deneb#deneb
     - upgrade_lc_update_to_deneb#deneb
-
-    # Not implemented: electra
+    # electra
     - compute_weak_subjectivity_period#electra
     - current_sync_committee_gindex_at_slot#electra
     - finalized_root_gindex_at_slot#electra
     - get_eth1_vote#electra
     - get_lc_execution_root#electra
+    - get_pending_partial_withdrawals#electra
+    - get_validators_sweep_withdrawals#electra
     - is_compounding_withdrawal_credential#electra
+    - is_eligible_for_partial_withdrawals#electra
     - is_within_weak_subjectivity_period#electra
     - next_sync_committee_gindex_at_slot#electra
     - normalize_merkle_branch#electra
     - prepare_execution_payload#electra
+    - update_pending_partial_withdrawals#electra
     - upgrade_lc_bootstrap_to_electra#electra
     - upgrade_lc_finality_update_to_electra#electra
     - upgrade_lc_header_to_electra#electra
     - upgrade_lc_optimistic_update_to_electra#electra
     - upgrade_lc_store_to_electra#electra
     - upgrade_lc_update_to_electra#electra
-
-    # Not implemented: fulu
+    # fulu
     - compute_matrix#fulu
     - get_blob_parameters#fulu
     - get_data_column_sidecars_from_block#fulu
     - get_data_column_sidecars_from_column_sidecar#fulu
     - recover_matrix#fulu
-
-    # Not implemented: gloas (future fork)
+    # gloas
     - compute_balance_weighted_acceptance#gloas
     - compute_balance_weighted_selection#gloas
     - compute_fork_version#gloas
@@ -368,49 +381,36 @@ exceptions:
     - verify_execution_payload_bid_signature#gloas
     - add_builder_to_registry#gloas
     - apply_deposit_for_builder#gloas
-    - apply_withdrawals#capella
     - apply_withdrawals#gloas
     - can_builder_cover_bid#gloas
-    - compute_proposer_score#phase0
     - convert_builder_index_to_validator_index#gloas
     - convert_validator_index_to_builder_index#gloas
     - get_attestation_score#gloas
-    - get_attestation_score#phase0
-    - get_balance_after_withdrawals#capella
     - get_builder_from_deposit#gloas
     - get_builder_withdrawals#gloas
     - get_builders_sweep_withdrawals#gloas
     - get_index_for_new_builder#gloas
     - get_pending_balance_to_withdraw_for_builder#gloas
-    - get_pending_partial_withdrawals#electra
     - get_proposer_preferences_signature#gloas
     - get_upcoming_proposal_slots#gloas
-    - get_validators_sweep_withdrawals#capella
-    - get_validators_sweep_withdrawals#electra
     - initiate_builder_exit#gloas
     - is_active_builder#gloas
     - is_builder_index#gloas
-    - is_eligible_for_partial_withdrawals#electra
     - is_head_late#gloas
     - is_head_weak#gloas
     - is_parent_strong#gloas
-    - is_proposer_equivocation#phase0
     - is_valid_proposal_slot#gloas
     - process_deposit_request#gloas
     - process_voluntary_exit#gloas
     - record_block_timeliness#gloas
-    - record_block_timeliness#phase0
     - should_apply_proposer_boost#gloas
     - update_builder_pending_withdrawals#gloas
     - update_next_withdrawal_builder_index#gloas
-    - update_next_withdrawal_index#capella
-    - update_next_withdrawal_validator_index#capella
     - update_payload_expected_withdrawals#gloas
-    - update_pending_partial_withdrawals#electra
     - update_proposer_boost_root#gloas
-    - update_proposer_boost_root#phase0
 
   presets:
+    # gloas
     - BUILDER_PENDING_WITHDRAWALS_LIMIT#gloas
     - BUILDER_REGISTRY_LIMIT#gloas
     - MAX_BUILDERS_PER_WITHDRAWALS_SWEEP#gloas

.github/workflows/check-specrefs.yml

@@ -12,11 +12,11 @@ jobs:
     - name: Check version consistency
       run: |
         WORKSPACE_VERSION=$(grep 'consensus_spec_version = ' WORKSPACE | sed 's/.*"\(.*\)"/\1/')
-        ETHSPECIFY_VERSION=$(grep '^version:' specrefs/.ethspecify.yml | sed 's/version: //')
+        ETHSPECIFY_VERSION=$(grep '^version:' .ethspecify.yml | sed 's/version: //')
         if [ "$WORKSPACE_VERSION" != "$ETHSPECIFY_VERSION" ]; then
           echo "Version mismatch between WORKSPACE and ethspecify"
           echo "  WORKSPACE: $WORKSPACE_VERSION"
-          echo "  specrefs/.ethspecify.yml: $ETHSPECIFY_VERSION"
+          echo "  .ethspecify.yml: $ETHSPECIFY_VERSION"
           exit 1
         else
           echo "Versions match: $WORKSPACE_VERSION"
@@ -26,7 +26,7 @@ jobs:
       run: python3 -mpip install ethspecify
 
     - name: Update spec references
-      run: ethspecify process --path=specrefs
+      run: ethspecify
 
     - name: Check for differences
       run: |
@@ -40,4 +40,4 @@ jobs:
         fi
 
     - name: Check spec references
-      run: ethspecify check --path=specrefs
+      run: ethspecify check

api/fallback/BUILD.bazel

@@ -0,0 +1,19 @@
+load("@prysm//tools/go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = [
+        "fallback.go",
+        "log.go",
+    ],
+    importpath = "github.com/OffchainLabs/prysm/v7/api/fallback",
+    visibility = ["//visibility:public"],
+    deps = ["@com_github_sirupsen_logrus//:go_default_library"],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["fallback_test.go"],
+    embed = [":go_default_library"],
+    deps = ["//testing/assert:go_default_library"],
+)

api/fallback/fallback.go

@@ -0,0 +1,66 @@
+package fallback
+
+import (
+	"context"
+
+	"github.com/sirupsen/logrus"
+)
+
+// HostProvider is the subset of connection-provider methods that EnsureReady
+// needs. Both grpc.GrpcConnectionProvider and rest.RestConnectionProvider
+// satisfy this interface.
+type HostProvider interface {
+	Hosts() []string
+	CurrentHost() string
+	SwitchHost(index int) error
+}
+
+// ReadyChecker can report whether the current endpoint is ready.
+// iface.NodeClient satisfies this implicitly.
+type ReadyChecker interface {
+	IsReady(ctx context.Context) bool
+}
+
+// EnsureReady iterates through the configured hosts and returns true as soon as
+// one responds as ready. It starts from the provider's current host and wraps
+// around using modular arithmetic, performing failover when a host is not ready.
+func EnsureReady(ctx context.Context, provider HostProvider, checker ReadyChecker) bool {
+	hosts := provider.Hosts()
+	numHosts := len(hosts)
+	startingHost := provider.CurrentHost()
+	var attemptedHosts []string
+
+	// Find current index
+	currentIdx := 0
+	for i, h := range hosts {
+		if h == startingHost {
+			currentIdx = i
+			break
+		}
+	}
+
+	for i := range numHosts {
+		if checker.IsReady(ctx) {
+			if len(attemptedHosts) > 0 {
+				log.WithFields(logrus.Fields{
+					"previous": startingHost,
+					"current":  provider.CurrentHost(),
+					"tried":    attemptedHosts,
+				}).Info("Switched to responsive beacon node")
+			}
+			return true
+		}
+		attemptedHosts = append(attemptedHosts, provider.CurrentHost())
+
+		// Try next host if not the last iteration
+		if i < numHosts-1 {
+			nextIdx := (currentIdx + i + 1) % numHosts
+			if err := provider.SwitchHost(nextIdx); err != nil {
+				log.WithError(err).Error("Failed to switch host")
+			}
+		}
+	}
+
+	log.WithField("tried", attemptedHosts).Warn("No responsive beacon node found")
+	return false
+}

api/fallback/fallback_test.go

@@ -0,0 +1,94 @@
+package fallback
+
+import (
+	"context"
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v7/testing/assert"
+)
+
+// mockHostProvider is a minimal HostProvider for unit tests.
+type mockHostProvider struct {
+	hosts     []string
+	hostIndex int
+}
+
+func (m *mockHostProvider) Hosts() []string { return m.hosts }
+func (m *mockHostProvider) CurrentHost() string {
+	return m.hosts[m.hostIndex%len(m.hosts)]
+}
+func (m *mockHostProvider) SwitchHost(index int) error { m.hostIndex = index; return nil }
+
+// mockReadyChecker records per-call IsReady results in sequence.
+type mockReadyChecker struct {
+	results []bool
+	idx     int
+}
+
+func (m *mockReadyChecker) IsReady(_ context.Context) bool {
+	if m.idx >= len(m.results) {
+		return false
+	}
+	r := m.results[m.idx]
+	m.idx++
+	return r
+}
+
+func TestEnsureReady_SingleHostReady(t *testing.T) {
+	provider := &mockHostProvider{hosts: []string{"http://host1:3500"}, hostIndex: 0}
+	checker := &mockReadyChecker{results: []bool{true}}
+	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
+	assert.Equal(t, 0, provider.hostIndex)
+}
+
+func TestEnsureReady_SingleHostNotReady(t *testing.T) {
+	provider := &mockHostProvider{hosts: []string{"http://host1:3500"}, hostIndex: 0}
+	checker := &mockReadyChecker{results: []bool{false}}
+	assert.Equal(t, false, EnsureReady(t.Context(), provider, checker))
+}
+
+func TestEnsureReady_SingleHostError(t *testing.T) {
+	provider := &mockHostProvider{hosts: []string{"http://host1:3500"}, hostIndex: 0}
+	checker := &mockReadyChecker{results: []bool{false}}
+	assert.Equal(t, false, EnsureReady(t.Context(), provider, checker))
+}
+
+func TestEnsureReady_MultipleHostsFirstReady(t *testing.T) {
+	provider := &mockHostProvider{
+		hosts:     []string{"http://host1:3500", "http://host2:3500"},
+		hostIndex: 0,
+	}
+	checker := &mockReadyChecker{results: []bool{true}}
+	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
+	assert.Equal(t, 0, provider.hostIndex)
+}
+
+func TestEnsureReady_MultipleHostsFailoverToSecond(t *testing.T) {
+	provider := &mockHostProvider{
+		hosts:     []string{"http://host1:3500", "http://host2:3500"},
+		hostIndex: 0,
+	}
+	checker := &mockReadyChecker{results: []bool{false, true}}
+	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
+	assert.Equal(t, 1, provider.hostIndex)
+}
+
+func TestEnsureReady_MultipleHostsNoneReady(t *testing.T) {
+	provider := &mockHostProvider{
+		hosts:     []string{"http://host1:3500", "http://host2:3500", "http://host3:3500"},
+		hostIndex: 0,
+	}
+	checker := &mockReadyChecker{results: []bool{false, false, false}}
+	assert.Equal(t, false, EnsureReady(t.Context(), provider, checker))
+}
+
+func TestEnsureReady_WrapAroundFromNonZeroIndex(t *testing.T) {
+	provider := &mockHostProvider{
+		hosts:     []string{"http://host0:3500", "http://host1:3500", "http://host2:3500"},
+		hostIndex: 1,
+	}
+	// host1 (start) fails, host2 fails, host0 succeeds
+	checker := &mockReadyChecker{results: []bool{false, false, true}}
+	assert.Equal(t, true, EnsureReady(t.Context(), provider, checker))
+	assert.Equal(t, 0, provider.hostIndex)
+}

api/fallback/log.go

@@ -0,0 +1,9 @@
+// Code generated by hack/gen-logs.sh; DO NOT EDIT.
+// This file is created and regenerated automatically. Anything added here might get removed.
+package fallback
+
+import "github.com/sirupsen/logrus"
+
+// The prefix for logs from this package will be the text after the last slash in the package path.
+// If you wish to change this, you should add your desired name in the runtime/logging/logrus-prefixed-formatter/prefix-replacement.go file.
+var log = logrus.WithField("package", "api/fallback")

api/grpc/grpc_connection_provider.go

@@ -25,6 +25,11 @@ type GrpcConnectionProvider interface {
 	// SwitchHost switches to the endpoint at the given index.
 	// The new connection is created lazily on next CurrentConn() call.
 	SwitchHost(index int) error
+	// ConnectionCounter returns a monotonically increasing counter that increments
+	// each time SwitchHost changes the active endpoint. This allows consumers to
+	// detect connection changes even when the host string returns to a previous value
+	// (e.g., host0 → host1 → host0).
+	ConnectionCounter() uint64
 	// Close closes the current connection.
 	Close()
 }
@@ -38,6 +43,7 @@ type grpcConnectionProvider struct {
 	// Current connection state (protected by mutex)
 	currentIndex uint64
 	conn         *grpc.ClientConn
+	connCounter  uint64
 
 	mu     sync.Mutex
 	closed bool
@@ -138,6 +144,7 @@ func (p *grpcConnectionProvider) SwitchHost(index int) error {
 
 	p.conn = nil // Clear immediately - new connection created lazily
 	p.currentIndex = uint64(index)
+	p.connCounter++
 
 	// Close old connection asynchronously to avoid blocking the caller
 	if oldConn != nil {
@@ -155,6 +162,12 @@ func (p *grpcConnectionProvider) SwitchHost(index int) error {
 	return nil
 }
 
+func (p *grpcConnectionProvider) ConnectionCounter() uint64 {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+	return p.connCounter
+}
+
 func (p *grpcConnectionProvider) Close() {
 	p.mu.Lock()
 	defer p.mu.Unlock()

api/grpc/mock_grpc_provider.go

@@ -4,17 +4,24 @@ import "google.golang.org/grpc"
 
 // MockGrpcProvider implements GrpcConnectionProvider for testing.
 type MockGrpcProvider struct {
-	MockConn  *grpc.ClientConn
-	MockHosts []string
+	MockConn     *grpc.ClientConn
+	MockHosts    []string
+	CurrentIndex int
+	ConnCounter  uint64
 }
 
 func (m *MockGrpcProvider) CurrentConn() *grpc.ClientConn { return m.MockConn }
 func (m *MockGrpcProvider) CurrentHost() string {
 	if len(m.MockHosts) > 0 {
-		return m.MockHosts[0]
+		return m.MockHosts[m.CurrentIndex]
 	}
 	return ""
 }
-func (m *MockGrpcProvider) Hosts() []string      { return m.MockHosts }
-func (m *MockGrpcProvider) SwitchHost(int) error { return nil }
-func (m *MockGrpcProvider) Close()               {}
+func (m *MockGrpcProvider) Hosts() []string { return m.MockHosts }
+func (m *MockGrpcProvider) SwitchHost(idx int) error {
+	m.CurrentIndex = idx
+	m.ConnCounter++
+	return nil
+}
+func (m *MockGrpcProvider) ConnectionCounter() uint64 { return m.ConnCounter }
+func (m *MockGrpcProvider) Close()                    {}

api/rest/mock_rest_provider.go

@@ -9,13 +9,13 @@ import (
 // MockRestProvider implements RestConnectionProvider for testing.
 type MockRestProvider struct {
 	MockClient  *http.Client
-	MockHandler RestHandler
+	MockHandler Handler
 	MockHosts   []string
 	HostIndex   int
 }
 
 func (m *MockRestProvider) HttpClient() *http.Client { return m.MockClient }
-func (m *MockRestProvider) RestHandler() RestHandler { return m.MockHandler }
+func (m *MockRestProvider) Handler() Handler         { return m.MockHandler }
 func (m *MockRestProvider) CurrentHost() string {
 	if len(m.MockHosts) > 0 {
 		return m.MockHosts[m.HostIndex%len(m.MockHosts)]
@@ -25,25 +25,22 @@ func (m *MockRestProvider) CurrentHost() string {
 func (m *MockRestProvider) Hosts() []string            { return m.MockHosts }
 func (m *MockRestProvider) SwitchHost(index int) error { m.HostIndex = index; return nil }
 
-// MockRestHandler implements RestHandler for testing.
-type MockRestHandler struct {
-	MockHost   string
-	MockClient *http.Client
+// MockHandler implements Handler for testing.
+type MockHandler struct {
+	MockHost string
 }
 
-func (m *MockRestHandler) Get(_ context.Context, _ string, _ any) error { return nil }
-func (m *MockRestHandler) GetStatusCode(_ context.Context, _ string) (int, error) {
+func (m *MockHandler) Get(_ context.Context, _ string, _ any) error { return nil }
+func (m *MockHandler) GetStatusCode(_ context.Context, _ string) (int, error) {
 	return http.StatusOK, nil
 }
-func (m *MockRestHandler) GetSSZ(_ context.Context, _ string) ([]byte, http.Header, error) {
+func (m *MockHandler) GetSSZ(_ context.Context, _ string) ([]byte, http.Header, error) {
 	return nil, nil, nil
 }
-func (m *MockRestHandler) Post(_ context.Context, _ string, _ map[string]string, _ *bytes.Buffer, _ any) error {
+func (m *MockHandler) Post(_ context.Context, _ string, _ map[string]string, _ *bytes.Buffer, _ any) error {
 	return nil
 }
-func (m *MockRestHandler) PostSSZ(_ context.Context, _ string, _ map[string]string, _ *bytes.Buffer) ([]byte, http.Header, error) {
+func (m *MockHandler) PostSSZ(_ context.Context, _ string, _ map[string]string, _ *bytes.Buffer) ([]byte, http.Header, error) {
 	return nil, nil, nil
 }
-func (m *MockRestHandler) HttpClient() *http.Client { return m.MockClient }
-func (m *MockRestHandler) Host() string             { return m.MockHost }
-func (m *MockRestHandler) SwitchHost(host string)   { m.MockHost = host }
+func (m *MockHandler) Host() string { return m.MockHost }

api/rest/rest_connection_provider.go

@@ -17,8 +17,8 @@ import (
 type RestConnectionProvider interface {
 	// HttpClient returns the configured HTTP client with headers, timeout, and optional tracing.
 	HttpClient() *http.Client
-	// RestHandler returns the REST handler for making API requests.
-	RestHandler() RestHandler
+	// Handler returns the REST handler for making API requests.
+	Handler() Handler
 	// CurrentHost returns the current REST API endpoint URL.
 	CurrentHost() string
 	// Hosts returns all configured REST API endpoint URLs.
@@ -54,7 +54,7 @@ func WithTracing() RestConnectionProviderOption {
 type restConnectionProvider struct {
 	endpoints     []string
 	httpClient    *http.Client
-	restHandler   RestHandler
+	restHandler   *handler
 	currentIndex  atomic.Uint64
 	timeout       time.Duration
 	headers       map[string][]string
@@ -96,7 +96,7 @@ func NewRestConnectionProvider(endpoint string, opts ...RestConnectionProviderOp
 	}
 
 	// Create the REST handler with the HTTP client and initial host
-	p.restHandler = newRestHandler(*p.httpClient, endpoints[0])
+	p.restHandler = newHandler(*p.httpClient, endpoints[0])
 
 	log.WithFields(logrus.Fields{
 		"endpoints": endpoints,
@@ -124,7 +124,7 @@ func (p *restConnectionProvider) HttpClient() *http.Client {
 	return p.httpClient
 }
 
-func (p *restConnectionProvider) RestHandler() RestHandler {
+func (p *restConnectionProvider) Handler() Handler {
 	return p.restHandler
 }
 

api/rest/rest_handler.go

@@ -21,32 +21,35 @@ import (
 
 type reqOption func(*http.Request)
 
-// RestHandler defines the interface for making REST API requests.
-type RestHandler interface {
+// Handler defines the interface for making REST API requests.
+type Handler interface {
 	Get(ctx context.Context, endpoint string, resp any) error
 	GetStatusCode(ctx context.Context, endpoint string) (int, error)
 	GetSSZ(ctx context.Context, endpoint string) ([]byte, http.Header, error)
 	Post(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer, resp any) error
 	PostSSZ(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer) ([]byte, http.Header, error)
-	HttpClient() *http.Client
 	Host() string
-	SwitchHost(host string)
 }
 
-type restHandler struct {
+type handler struct {
 	client       http.Client
 	host         string
 	reqOverrides []reqOption
 }
 
-// newRestHandler returns a RestHandler (internal use)
-func newRestHandler(client http.Client, host string) RestHandler {
-	return NewRestHandler(client, host)
+// newHandler returns a *handler for internal use within the rest package.
+func newHandler(client http.Client, host string) *handler {
+	rh := &handler{
+		client: client,
+		host:   host,
+	}
+	rh.appendAcceptOverride()
+	return rh
 }
 
-// NewRestHandler returns a RestHandler
-func NewRestHandler(client http.Client, host string) RestHandler {
-	rh := &restHandler{
+// NewHandler returns a Handler
+func NewHandler(client http.Client, host string) Handler {
+	rh := &handler{
 		client: client,
 		host:   host,
 	}
@@ -57,7 +60,7 @@ func NewRestHandler(client http.Client, host string) RestHandler {
 // appendAcceptOverride enables the Accept header to be customized at runtime via an environment variable.
 // This is specified as an env var because it is a niche option that prysm may use for performance testing or debugging
 // bug which users are unlikely to need. Using an env var keeps the set of user-facing flags cleaner.
-func (c *restHandler) appendAcceptOverride() {
+func (c *handler) appendAcceptOverride() {
 	if accept := os.Getenv(params.EnvNameOverrideAccept); accept != "" {
 		c.reqOverrides = append(c.reqOverrides, func(req *http.Request) {
 			req.Header.Set("Accept", accept)
@@ -66,18 +69,18 @@ func (c *restHandler) appendAcceptOverride() {
 }
 
 // HttpClient returns the underlying HTTP client of the handler
-func (c *restHandler) HttpClient() *http.Client {
+func (c *handler) HttpClient() *http.Client {
 	return &c.client
 }
 
 // Host returns the underlying HTTP host
-func (c *restHandler) Host() string {
+func (c *handler) Host() string {
 	return c.host
 }
 
 // Get sends a GET request and decodes the response body as a JSON object into the passed in object.
 // If an HTTP error is returned, the body is decoded as a DefaultJsonError JSON object and returned as the first return value.
-func (c *restHandler) Get(ctx context.Context, endpoint string, resp any) error {
+func (c *handler) Get(ctx context.Context, endpoint string, resp any) error {
 	url := c.host + endpoint
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
@@ -100,7 +103,7 @@ func (c *restHandler) Get(ctx context.Context, endpoint string, resp any) error
 // GetStatusCode sends a GET request and returns only the HTTP status code.
 // This is useful for endpoints like /eth/v1/node/health that communicate status via HTTP codes
 // (200 = ready, 206 = syncing, 503 = unavailable) rather than response bodies.
-func (c *restHandler) GetStatusCode(ctx context.Context, endpoint string) (int, error) {
+func (c *handler) GetStatusCode(ctx context.Context, endpoint string) (int, error) {
 	url := c.host + endpoint
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
@@ -119,7 +122,7 @@ func (c *restHandler) GetStatusCode(ctx context.Context, endpoint string) (int,
 	return httpResp.StatusCode, nil
 }
 
-func (c *restHandler) GetSSZ(ctx context.Context, endpoint string) ([]byte, http.Header, error) {
+func (c *handler) GetSSZ(ctx context.Context, endpoint string) ([]byte, http.Header, error) {
 	url := c.host + endpoint
 	req, err := http.NewRequestWithContext(ctx, http.MethodGet, url, nil)
 	if err != nil {
@@ -174,7 +177,7 @@ func (c *restHandler) GetSSZ(ctx context.Context, endpoint string) ([]byte, http
 
 // Post sends a POST request and decodes the response body as a JSON object into the passed in object.
 // If an HTTP error is returned, the body is decoded as a DefaultJsonError JSON object and returned as the first return value.
-func (c *restHandler) Post(
+func (c *handler) Post(
 	ctx context.Context,
 	apiEndpoint string,
 	headers map[string]string,
@@ -210,7 +213,7 @@ func (c *restHandler) Post(
 }
 
 // PostSSZ sends a POST request and prefers an SSZ (application/octet-stream) response body.
-func (c *restHandler) PostSSZ(
+func (c *handler) PostSSZ(
 	ctx context.Context,
 	apiEndpoint string,
 	headers map[string]string,
@@ -311,6 +314,6 @@ func decodeResp(httpResp *http.Response, resp any) error {
 	return nil
 }
 
-func (c *restHandler) SwitchHost(host string) {
+func (c *handler) SwitchHost(host string) {
 	c.host = host
 }

beacon-chain/core/gloas/bid.go

@@ -17,27 +17,50 @@ import (
 )
 
 // ProcessExecutionPayloadBid processes a signed execution payload bid in the Gloas fork.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// process_execution_payload_bid(state: BeaconState, block: BeaconBlock):
 //
-//	signed_bid = block.body.signed_execution_payload_bid
-//	bid = signed_bid.message
-//	builder_index = bid.builder_index
-//	amount = bid.value
-//	if builder_index == BUILDER_INDEX_SELF_BUILD:
-//	  assert amount == 0
-//	  assert signed_bid.signature == G2_POINT_AT_INFINITY
-//	else:
-//	  assert is_active_builder(state, builder_index)
-//	  assert can_builder_cover_bid(state, builder_index, amount)
-//	  assert verify_execution_payload_bid_signature(state, signed_bid)
-//	assert bid.slot == block.slot
-//	assert bid.parent_block_hash == state.latest_block_hash
-//	assert bid.parent_block_root == block.parent_root
-//	assert bid.prev_randao == get_randao_mix(state, get_current_epoch(state))
-//	if amount > 0:
-//	  state.builder_pending_payments[...] = BuilderPendingPayment(weight=0, withdrawal=BuilderPendingWithdrawal(fee_recipient=bid.fee_recipient, amount=amount, builder_index=builder_index))
-//	state.latest_execution_payload_bid = bid
+//	<spec fn="process_execution_payload_bid" fork="gloas" hash="6dc696bb">
+//	def process_execution_payload_bid(state: BeaconState, block: BeaconBlock) -> None:
+//	    signed_bid = block.body.signed_execution_payload_bid
+//	    bid = signed_bid.message
+//	    builder_index = bid.builder_index
+//	    amount = bid.value
+//
+//	    # For self-builds, amount must be zero regardless of withdrawal credential prefix
+//	    if builder_index == BUILDER_INDEX_SELF_BUILD:
+//	        assert amount == 0
+//	        assert signed_bid.signature == bls.G2_POINT_AT_INFINITY
+//	    else:
+//	        # Verify that the builder is active
+//	        assert is_active_builder(state, builder_index)
+//	        # Verify that the builder has funds to cover the bid
+//	        assert can_builder_cover_bid(state, builder_index, amount)
+//	        # Verify that the bid signature is valid
+//	        assert verify_execution_payload_bid_signature(state, signed_bid)
+//
+//	    # Verify that the bid is for the current slot
+//	    assert bid.slot == block.slot
+//	    # Verify that the bid is for the right parent block
+//	    assert bid.parent_block_hash == state.latest_block_hash
+//	    assert bid.parent_block_root == block.parent_root
+//	    assert bid.prev_randao == get_randao_mix(state, get_current_epoch(state))
+//
+//	    # Record the pending payment if there is some payment
+//	    if amount > 0:
+//	        pending_payment = BuilderPendingPayment(
+//	            weight=0,
+//	            withdrawal=BuilderPendingWithdrawal(
+//	                fee_recipient=bid.fee_recipient,
+//	                amount=amount,
+//	                builder_index=builder_index,
+//	            ),
+//	        )
+//	        state.builder_pending_payments[SLOTS_PER_EPOCH + bid.slot % SLOTS_PER_EPOCH] = (
+//	            pending_payment
+//	        )
+//
+//	    # Cache the signed execution payload bid
+//	    state.latest_execution_payload_bid = bid
+//	</spec>
 func ProcessExecutionPayloadBid(st state.BeaconState, block interfaces.ReadOnlyBeaconBlock) error {
 	signedBid, err := block.Body().SignedExecutionPayloadBid()
 	if err != nil {

beacon-chain/core/gloas/payload_attestation.go

@@ -24,14 +24,21 @@ import (
 )
 
 // ProcessPayloadAttestations validates payload attestations in a block body.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// process_payload_attestation(state: BeaconState, payload_attestation: PayloadAttestation):
 //
-//	data = payload_attestation.data
-//	assert data.beacon_block_root == state.latest_block_header.parent_root
-//	assert data.slot + 1 == state.slot
-//	indexed = get_indexed_payload_attestation(state, data.slot, payload_attestation)
-//	assert is_valid_indexed_payload_attestation(state, indexed)
+//	<spec fn="process_payload_attestation" fork="gloas" hash="f46bf0b0">
+//	def process_payload_attestation(
+//	    state: BeaconState, payload_attestation: PayloadAttestation
+//	) -> None:
+//	    data = payload_attestation.data
+//
+//	    # Check that the attestation is for the parent beacon block
+//	    assert data.beacon_block_root == state.latest_block_header.parent_root
+//	    # Check that the attestation is for the previous slot
+//	    assert data.slot + 1 == state.slot
+//	    # Verify signature
+//	    indexed_payload_attestation = get_indexed_payload_attestation(state, payload_attestation)
+//	    assert is_valid_indexed_payload_attestation(state, indexed_payload_attestation)
+//	</spec>
 func ProcessPayloadAttestations(ctx context.Context, st state.BeaconState, body interfaces.ReadOnlyBeaconBlockBody) error {
 	atts, err := body.PayloadAttestations()
 	if err != nil {
@@ -90,17 +97,24 @@ func indexedPayloadAttestation(ctx context.Context, st state.ReadOnlyBeaconState
 }
 
 // payloadCommittee returns the payload timeliness committee for a given slot for the state.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// get_ptc(state: BeaconState, slot: Slot) -> Vector[ValidatorIndex, PTC_SIZE]:
 //
-//	epoch = compute_epoch_at_slot(slot)
-//	seed = hash(get_seed(state, epoch, DOMAIN_PTC_ATTESTER) + uint_to_bytes(slot))
-//	indices = []
-//	committees_per_slot = get_committee_count_per_slot(state, epoch)
-//	for i in range(committees_per_slot):
-//	  committee = get_beacon_committee(state, slot, CommitteeIndex(i))
-//	  indices.extend(committee)
-//	return compute_balance_weighted_selection(state, indices, seed, size=PTC_SIZE, shuffle_indices=False)
+//	<spec fn="get_ptc" fork="gloas" hash="ae15f761">
+//	def get_ptc(state: BeaconState, slot: Slot) -> Vector[ValidatorIndex, PTC_SIZE]:
+//	    """
+//	    Get the payload timeliness committee for the given ``slot``.
+//	    """
+//	    epoch = compute_epoch_at_slot(slot)
+//	    seed = hash(get_seed(state, epoch, DOMAIN_PTC_ATTESTER) + uint_to_bytes(slot))
+//	    indices: List[ValidatorIndex] = []
+//	    # Concatenate all committees for this slot in order
+//	    committees_per_slot = get_committee_count_per_slot(state, epoch)
+//	    for i in range(committees_per_slot):
+//	        committee = get_beacon_committee(state, slot, CommitteeIndex(i))
+//	        indices.extend(committee)
+//	    return compute_balance_weighted_selection(
+//	        state, indices, seed, size=PTC_SIZE, shuffle_indices=False
+//	    )
+//	</spec>
 func payloadCommittee(ctx context.Context, st state.ReadOnlyBeaconState, slot primitives.Slot) ([]primitives.ValidatorIndex, error) {
 	epoch := slots.ToEpoch(slot)
 	seed, err := ptcSeed(st, epoch, slot)
@@ -152,17 +166,35 @@ func ptcSeed(st state.ReadOnlyBeaconState, epoch primitives.Epoch, slot primitiv
 }
 
 // selectByBalance selects a balance-weighted subset of input candidates.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// compute_balance_weighted_selection(state, indices, seed, size, shuffle_indices):
-// Note: shuffle_indices is false for PTC.
 //
-//	total = len(indices); selected = []; i = 0
-//	while len(selected) < size:
-//	  next = i % total
-//	  if shuffle_indices: next = compute_shuffled_index(next, total, seed)
-//	  if compute_balance_weighted_acceptance(state, indices[next], seed, i):
-//	    selected.append(indices[next])
-//	  i += 1
+//	<spec fn="compute_balance_weighted_selection" fork="gloas" hash="2c9f1c23">
+//	def compute_balance_weighted_selection(
+//	    state: BeaconState,
+//	    indices: Sequence[ValidatorIndex],
+//	    seed: Bytes32,
+//	    size: uint64,
+//	    shuffle_indices: bool,
+//	) -> Sequence[ValidatorIndex]:
+//	    """
+//	    Return ``size`` indices sampled by effective balance, using ``indices``
+//	    as candidates. If ``shuffle_indices`` is ``True``, candidate indices
+//	    are themselves sampled from ``indices`` by shuffling it, otherwise
+//	    ``indices`` is traversed in order.
+//	    """
+//	    total = uint64(len(indices))
+//	    assert total > 0
+//	    selected: List[ValidatorIndex] = []
+//	    i = uint64(0)
+//	    while len(selected) < size:
+//	        next_index = i % total
+//	        if shuffle_indices:
+//	            next_index = compute_shuffled_index(next_index, total, seed)
+//	        candidate_index = indices[next_index]
+//	        if compute_balance_weighted_acceptance(state, candidate_index, seed, i):
+//	            selected.append(candidate_index)
+//	        i += 1
+//	    return selected
+//	</spec>
 func selectByBalanceFill(
 	ctx context.Context,
 	st state.ReadOnlyBeaconState,
@@ -199,15 +231,22 @@ func selectByBalanceFill(
 }
 
 // acceptByBalance determines if a validator is accepted based on its effective balance.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// compute_balance_weighted_acceptance(state, index, seed, i):
 //
-//	MAX_RANDOM_VALUE = 2**16 - 1
-//	random_bytes = hash(seed + uint_to_bytes(i // 16))
-//	offset = i % 16 * 2
-//	random_value = bytes_to_uint64(random_bytes[offset:offset+2])
-//	effective_balance = state.validators[index].effective_balance
-//	return effective_balance * MAX_RANDOM_VALUE >= MAX_EFFECTIVE_BALANCE_ELECTRA * random_value
+//	<spec fn="compute_balance_weighted_acceptance" fork="gloas" hash="9954dcd0">
+//	def compute_balance_weighted_acceptance(
+//	    state: BeaconState, index: ValidatorIndex, seed: Bytes32, i: uint64
+//	) -> bool:
+//	    """
+//	    Return whether to accept the selection of the validator ``index``, with probability
+//	    proportional to its ``effective_balance``, and randomness given by ``seed`` and ``i``.
+//	    """
+//	    MAX_RANDOM_VALUE = 2**16 - 1
+//	    random_bytes = hash(seed + uint_to_bytes(i // 16))
+//	    offset = i % 16 * 2
+//	    random_value = bytes_to_uint64(random_bytes[offset : offset + 2])
+//	    effective_balance = state.validators[index].effective_balance
+//	    return effective_balance * MAX_RANDOM_VALUE >= MAX_EFFECTIVE_BALANCE_ELECTRA * random_value
+//	</spec>
 func acceptByBalance(st state.ReadOnlyBeaconState, idx primitives.ValidatorIndex, seedBuf []byte, hashFunc func([]byte) [32]byte, maxBalance uint64, round uint64) (bool, error) {
 	// Reuse the seed buffer by overwriting the last 8 bytes with the round counter.
 	binary.LittleEndian.PutUint64(seedBuf[len(seedBuf)-8:], round/16)
@@ -224,16 +263,26 @@ func acceptByBalance(st state.ReadOnlyBeaconState, idx primitives.ValidatorIndex
 }
 
 // validIndexedPayloadAttestation verifies the signature of an indexed payload attestation.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// is_valid_indexed_payload_attestation(state: BeaconState, indexed_payload_attestation: IndexedPayloadAttestation) -> bool:
 //
-//	indices = indexed_payload_attestation.attesting_indices
-//	return len(indices) > 0 and indices == sorted(indices) and
-//	  bls.FastAggregateVerify(
-//	    [state.validators[i].pubkey for i in indices],
-//	    compute_signing_root(indexed_payload_attestation.data, get_domain(state, DOMAIN_PTC_ATTESTER, compute_epoch_at_slot(attestation.data.slot)),
-//	    indexed_payload_attestation.signature,
-//	  )
+//	<spec fn="is_valid_indexed_payload_attestation" fork="gloas" hash="cf1e65b5">
+//	def is_valid_indexed_payload_attestation(
+//	    state: BeaconState, indexed_payload_attestation: IndexedPayloadAttestation
+//	) -> bool:
+//	    """
+//	    Check if ``indexed_payload_attestation`` is non-empty, has sorted indices, and has
+//	    a valid aggregate signature.
+//	    """
+//	    # Verify indices are non-empty and sorted
+//	    indices = indexed_payload_attestation.attesting_indices
+//	    if len(indices) == 0 or not indices == sorted(indices):
+//	        return False
+//
+//	    # Verify aggregate signature
+//	    pubkeys = [state.validators[i].pubkey for i in indices]
+//	    domain = get_domain(state, DOMAIN_PTC_ATTESTER, None)
+//	    signing_root = compute_signing_root(indexed_payload_attestation.data, domain)
+//	    return bls.FastAggregateVerify(pubkeys, signing_root, indexed_payload_attestation.signature)
+//	</spec>
 func validIndexedPayloadAttestation(st state.ReadOnlyBeaconState, att *consensus_types.IndexedPayloadAttestation) error {
 	indices := att.AttestingIndices
 	if len(indices) == 0 || !slices.IsSorted(indices) {

beacon-chain/core/gloas/pending_payment.go

@@ -10,17 +10,21 @@ import (
 )
 
 // ProcessBuilderPendingPayments processes the builder pending payments from the previous epoch.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// def process_builder_pending_payments(state: BeaconState) -> None:
 //
-//	quorum = get_builder_payment_quorum_threshold(state)
-//	for payment in state.builder_pending_payments[:SLOTS_PER_EPOCH]:
-//	    if payment.weight >= quorum:
-//	        state.builder_pending_withdrawals.append(payment.withdrawal)
+//	<spec fn="process_builder_pending_payments" fork="gloas" hash="10da48dd">
+//	def process_builder_pending_payments(state: BeaconState) -> None:
+//	    """
+//	    Processes the builder pending payments from the previous epoch.
+//	    """
+//	    quorum = get_builder_payment_quorum_threshold(state)
+//	    for payment in state.builder_pending_payments[:SLOTS_PER_EPOCH]:
+//	        if payment.weight >= quorum:
+//	            state.builder_pending_withdrawals.append(payment.withdrawal)
 //
-//	old_payments = state.builder_pending_payments[SLOTS_PER_EPOCH:]
-//	new_payments = [BuilderPendingPayment() for _ in range(SLOTS_PER_EPOCH)]
-//	state.builder_pending_payments = old_payments + new_payments
+//	    old_payments = state.builder_pending_payments[SLOTS_PER_EPOCH:]
+//	    new_payments = [BuilderPendingPayment() for _ in range(SLOTS_PER_EPOCH)]
+//	    state.builder_pending_payments = old_payments + new_payments
+//	</spec>
 func ProcessBuilderPendingPayments(state state.BeaconState) error {
 	quorum, err := builderQuorumThreshold(state)
 	if err != nil {
@@ -53,12 +57,16 @@ func ProcessBuilderPendingPayments(state state.BeaconState) error {
 }
 
 // builderQuorumThreshold calculates the quorum threshold for builder payments.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// def get_builder_payment_quorum_threshold(state: BeaconState) -> uint64:
 //
-//	per_slot_balance = get_total_active_balance(state) // SLOTS_PER_EPOCH
-//	quorum = per_slot_balance * BUILDER_PAYMENT_THRESHOLD_NUMERATOR
-//	return uint64(quorum // BUILDER_PAYMENT_THRESHOLD_DENOMINATOR)
+//	<spec fn="get_builder_payment_quorum_threshold" fork="gloas" hash="a64b7ffb">
+//	def get_builder_payment_quorum_threshold(state: BeaconState) -> uint64:
+//	    """
+//	    Calculate the quorum threshold for builder payments.
+//	    """
+//	    per_slot_balance = get_total_active_balance(state) // SLOTS_PER_EPOCH
+//	    quorum = per_slot_balance * BUILDER_PAYMENT_THRESHOLD_NUMERATOR
+//	    return uint64(quorum // BUILDER_PAYMENT_THRESHOLD_DENOMINATOR)
+//	</spec>
 func builderQuorumThreshold(state state.ReadOnlyBeaconState) (primitives.Gwei, error) {
 	activeBalance, err := helpers.TotalActiveBalance(state)
 	if err != nil {

beacon-chain/core/gloas/proposer_slashing.go

@@ -11,16 +11,20 @@ import (
 )
 
 // RemoveBuilderPendingPayment removes the pending builder payment for the proposal slot.
-// Spec v1.7.0 (pseudocode):
 //
+//	<spec fn="process_proposer_slashing" fork="gloas" lines="22-32" hash="4da721ef">
+//	# [New in Gloas:EIP7732]
+//	# Remove the BuilderPendingPayment corresponding to
+//	# this proposal if it is still in the 2-epoch window.
 //	slot = header_1.slot
 //	proposal_epoch = compute_epoch_at_slot(slot)
 //	if proposal_epoch == get_current_epoch(state):
-//	  payment_index = SLOTS_PER_EPOCH + slot % SLOTS_PER_EPOCH
-//	  state.builder_pending_payments[payment_index] = BuilderPendingPayment()
+//	    payment_index = SLOTS_PER_EPOCH + slot % SLOTS_PER_EPOCH
+//	    state.builder_pending_payments[payment_index] = BuilderPendingPayment()
 //	elif proposal_epoch == get_previous_epoch(state):
-//	  payment_index = slot % SLOTS_PER_EPOCH
-//	  state.builder_pending_payments[payment_index] = BuilderPendingPayment()
+//	    payment_index = slot % SLOTS_PER_EPOCH
+//	    state.builder_pending_payments[payment_index] = BuilderPendingPayment()
+//	</spec>
 func RemoveBuilderPendingPayment(st state.BeaconState, header *eth.BeaconBlockHeader) error {
 	proposalEpoch := slots.ToEpoch(header.Slot)
 	currentEpoch := time.CurrentEpoch(st)

beacon-chain/core/transition/transition.go

@@ -143,10 +143,11 @@ func ProcessSlot(ctx context.Context, state state.BeaconState) (state.BeaconStat
 		return nil, err
 	}
 
-	// Spec v1.6.1 (pseudocode):
+	// <spec fn="process_slot" fork="gloas" lines="11-13" hash="62b28839">
 	// # [New in Gloas:EIP7732]
 	// # Unset the next payload availability
 	// state.execution_payload_availability[(state.slot + 1) % SLOTS_PER_HISTORICAL_ROOT] = 0b0
+	// </spec>
 	if state.Version() >= version.Gloas {
 		index := uint64((state.Slot() + 1) % params.BeaconConfig().SlotsPerHistoricalRoot)
 		if err := state.UpdateExecutionPayloadAvailabilityAtIndex(index, 0x0); err != nil {

beacon-chain/state/state-native/getters_gloas.go

@@ -46,14 +46,20 @@ func (b *BeaconState) BuilderPubkey(builderIndex primitives.BuilderIndex) ([fiel
 }
 
 // IsActiveBuilder returns true if the builder placement is finalized and it has not initiated exit.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// def is_active_builder(state: BeaconState, builder_index: BuilderIndex) -> bool:
 //
-//	builder = state.builders[builder_index]
-//	return (
-//	    builder.deposit_epoch < state.finalized_checkpoint.epoch
-//	    and builder.withdrawable_epoch == FAR_FUTURE_EPOCH
-//	)
+//	<spec fn="is_active_builder" fork="gloas" hash="1a599fb2">
+//	def is_active_builder(state: BeaconState, builder_index: BuilderIndex) -> bool:
+//	    """
+//	    Check if the builder at ``builder_index`` is active for the given ``state``.
+//	    """
+//	    builder = state.builders[builder_index]
+//	    return (
+//	        # Placement in builder list is finalized
+//	        builder.deposit_epoch < state.finalized_checkpoint.epoch
+//	        # Has not initiated exit
+//	        and builder.withdrawable_epoch == FAR_FUTURE_EPOCH
+//	    )
+//	</spec>
 func (b *BeaconState) IsActiveBuilder(builderIndex primitives.BuilderIndex) (bool, error) {
 	if b.version < version.Gloas {
 		return false, errNotSupported("IsActiveBuilder", b.version)
@@ -72,15 +78,18 @@ func (b *BeaconState) IsActiveBuilder(builderIndex primitives.BuilderIndex) (boo
 }
 
 // CanBuilderCoverBid returns true if the builder has enough balance to cover the given bid amount.
-// Spec v1.7.0-alpha.0 (pseudocode):
-// def can_builder_cover_bid(state: BeaconState, builder_index: BuilderIndex, bid_amount: Gwei) -> bool:
 //
-//	builder_balance = state.builders[builder_index].balance
-//	pending_withdrawals_amount = get_pending_balance_to_withdraw_for_builder(state, builder_index)
-//	min_balance = MIN_DEPOSIT_AMOUNT + pending_withdrawals_amount
-//	if builder_balance < min_balance:
-//	    return False
-//	return builder_balance - min_balance >= bid_amount
+//	<spec fn="can_builder_cover_bid" fork="gloas" hash="9e3f2d7c">
+//	def can_builder_cover_bid(
+//	    state: BeaconState, builder_index: BuilderIndex, bid_amount: Gwei
+//	) -> bool:
+//	    builder_balance = state.builders[builder_index].balance
+//	    pending_withdrawals_amount = get_pending_balance_to_withdraw_for_builder(state, builder_index)
+//	    min_balance = MIN_DEPOSIT_AMOUNT + pending_withdrawals_amount
+//	    if builder_balance < min_balance:
+//	        return False
+//	    return builder_balance - min_balance >= bid_amount
+//	</spec>
 func (b *BeaconState) CanBuilderCoverBid(builderIndex primitives.BuilderIndex, bidAmount primitives.Gwei) (bool, error) {
 	if b.version < version.Gloas {
 		return false, errNotSupported("CanBuilderCoverBid", b.version)

changelog/james-prysm_host-fallback-cleanup.md

@@ -0,0 +1,11 @@
+### Ignored 
+
+- moved finding healthy node logic to connection provider and other various cleanup on naming.
+
+### Changed
+
+- Improved node fallback logs.
+
+### Fixed
+
+- a potential race condition when switching hosts quickly and reconnecting to same host on an old connection.

changelog/james-prysm_simplify-parse-beacon-block.md

@@ -0,0 +1,3 @@
+### Ignored
+
+- improving maintainability and deduplication on get and post block parsing.

changelog/jtraglia-improve-ethspecify-integration.md

@@ -0,0 +1,3 @@
+### Changed
+
+- Improved integrations with ethspecify so specrefs can be used throughout the codebase.

specrefs/README.md

@@ -11,17 +11,12 @@ Install `ethspecify` with the following command:
 pipx install ethspecify
 ```
 
-> [!NOTE]
-> You can run `ethspecify <cmd>` in the `specrefs` directory or
-> `ethspecify <cmd> --path=specrefs` from the project's root directory.
-
 ## Maintenance
 
 When adding support for a new specification version, follow these steps:
 
-0. Change directory into the `specrefs` directory.
 1. Update the version in `.ethspecify.yml` configuration.
-2. Run `ethspecify process` to update/populate specrefs.
+2. Run `ethspecify` to update/populate specrefs.
 3. Run `ethspecify check` to check specrefs.
 4. If there are errors, use the error message as a guide to fix the issue. If
    there are new specrefs with empty sources, implement/locate each item and

specrefs/configs.yml

@@ -1,4 +1,4 @@
-- name: AGGREGATE_DUE_BPS
+- name: AGGREGATE_DUE_BPS#phase0
   sources:
     - file: config/params/config.go
       search: AggregateDueBPS\s+primitives.BP
@@ -8,7 +8,14 @@
     AGGREGATE_DUE_BPS: uint64 = 6667
     </spec>
 
-- name: ALTAIR_FORK_EPOCH
+- name: AGGREGATE_DUE_BPS_GLOAS#gloas
+  sources: []
+  spec: |
+    <spec config_var="AGGREGATE_DUE_BPS_GLOAS" fork="gloas" hash="34aa3164">
+    AGGREGATE_DUE_BPS_GLOAS: uint64 = 5000
+    </spec>
+
+- name: ALTAIR_FORK_EPOCH#altair
   sources:
     - file: config/params/config.go
       search: AltairForkEpoch\s+primitives.Epoch
@@ -18,7 +25,7 @@
     ALTAIR_FORK_EPOCH: Epoch = 74240
     </spec>
 
-- name: ALTAIR_FORK_VERSION
+- name: ALTAIR_FORK_VERSION#altair
   sources:
     - file: config/params/config.go
       search: AltairForkVersion\s+\[]byte
@@ -28,7 +35,7 @@
     ALTAIR_FORK_VERSION: Version = '0x01000000'
     </spec>
 
-- name: ATTESTATION_DUE_BPS
+- name: ATTESTATION_DUE_BPS#phase0
   sources:
     - file: config/params/config.go
       search: AttestationDueBPS\s+primitives.BP
@@ -38,7 +45,14 @@
     ATTESTATION_DUE_BPS: uint64 = 3333
     </spec>
 
-- name: ATTESTATION_PROPAGATION_SLOT_RANGE
+- name: ATTESTATION_DUE_BPS_GLOAS#gloas
+  sources: []
+  spec: |
+    <spec config_var="ATTESTATION_DUE_BPS_GLOAS" fork="gloas" hash="3863c1ef">
+    ATTESTATION_DUE_BPS_GLOAS: uint64 = 2500
+    </spec>
+
+- name: ATTESTATION_PROPAGATION_SLOT_RANGE#phase0
   sources:
     - file: config/params/config.go
       search: AttestationPropagationSlotRange\s+primitives.Slot
@@ -48,7 +62,7 @@
     ATTESTATION_PROPAGATION_SLOT_RANGE = 32
     </spec>
 
-- name: ATTESTATION_SUBNET_COUNT
+- name: ATTESTATION_SUBNET_COUNT#phase0
   sources:
     - file: config/params/config.go
       search: AttestationSubnetCount\s+uint64
@@ -58,7 +72,7 @@
     ATTESTATION_SUBNET_COUNT = 64
     </spec>
 
-- name: ATTESTATION_SUBNET_EXTRA_BITS
+- name: ATTESTATION_SUBNET_EXTRA_BITS#phase0
   sources:
     - file: config/params/config.go
       search: AttestationSubnetExtraBits\s+uint64
@@ -68,7 +82,7 @@
     ATTESTATION_SUBNET_EXTRA_BITS = 0
     </spec>
 
-- name: ATTESTATION_SUBNET_PREFIX_BITS
+- name: ATTESTATION_SUBNET_PREFIX_BITS#phase0
   sources:
     - file: config/params/config.go
       search: AttestationSubnetPrefixBits\s+uint64
@@ -78,7 +92,7 @@
     ATTESTATION_SUBNET_PREFIX_BITS: int = 6
     </spec>
 
-- name: BALANCE_PER_ADDITIONAL_CUSTODY_GROUP
+- name: BALANCE_PER_ADDITIONAL_CUSTODY_GROUP#fulu
   sources:
     - file: config/params/config.go
       search: BalancePerAdditionalCustodyGroup\s+uint64
@@ -88,7 +102,7 @@
     BALANCE_PER_ADDITIONAL_CUSTODY_GROUP: Gwei = 32000000000
     </spec>
 
-- name: BELLATRIX_FORK_EPOCH
+- name: BELLATRIX_FORK_EPOCH#bellatrix
   sources:
     - file: config/params/config.go
       search: BellatrixForkEpoch\s+primitives.Epoch
@@ -98,7 +112,7 @@
     BELLATRIX_FORK_EPOCH: Epoch = 144896
     </spec>
 
-- name: BELLATRIX_FORK_VERSION
+- name: BELLATRIX_FORK_VERSION#bellatrix
   sources:
     - file: config/params/config.go
       search: BellatrixForkVersion\s+\[]byte
@@ -108,7 +122,7 @@
     BELLATRIX_FORK_VERSION: Version = '0x02000000'
     </spec>
 
-- name: BLOB_SCHEDULE
+- name: BLOB_SCHEDULE#fulu
   sources:
     - file: config/params/config.go
       search: BlobSchedule\s+\[]BlobScheduleEntry
@@ -127,7 +141,7 @@
     )
     </spec>
 
-- name: BLOB_SIDECAR_SUBNET_COUNT
+- name: BLOB_SIDECAR_SUBNET_COUNT#deneb
   sources:
     - file: config/params/config.go
       search: BlobsidecarSubnetCount\s+uint64
@@ -137,7 +151,7 @@
     BLOB_SIDECAR_SUBNET_COUNT = 6
     </spec>
 
-- name: BLOB_SIDECAR_SUBNET_COUNT_ELECTRA
+- name: BLOB_SIDECAR_SUBNET_COUNT_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: BlobsidecarSubnetCountElectra\s+uint64
@@ -147,7 +161,7 @@
     BLOB_SIDECAR_SUBNET_COUNT_ELECTRA = 9
     </spec>
 
-- name: CAPELLA_FORK_EPOCH
+- name: CAPELLA_FORK_EPOCH#capella
   sources:
     - file: config/params/config.go
       search: CapellaForkEpoch\s+primitives.Epoch
@@ -157,7 +171,7 @@
     CAPELLA_FORK_EPOCH: Epoch = 194048
     </spec>
 
-- name: CAPELLA_FORK_VERSION
+- name: CAPELLA_FORK_VERSION#capella
   sources:
     - file: config/params/config.go
       search: CapellaForkVersion\s+\[]byte
@@ -167,7 +181,7 @@
     CAPELLA_FORK_VERSION: Version = '0x03000000'
     </spec>
 
-- name: CHURN_LIMIT_QUOTIENT
+- name: CHURN_LIMIT_QUOTIENT#phase0
   sources:
     - file: config/params/config.go
       search: ChurnLimitQuotient\s+uint64
@@ -177,7 +191,7 @@
     CHURN_LIMIT_QUOTIENT: uint64 = 65536
     </spec>
 
-- name: CONTRIBUTION_DUE_BPS
+- name: CONTRIBUTION_DUE_BPS#altair
   sources:
     - file: config/params/config.go
       search: ContributionDueBPS\s+primitives.BP
@@ -187,7 +201,14 @@
     CONTRIBUTION_DUE_BPS: uint64 = 6667
     </spec>
 
-- name: CUSTODY_REQUIREMENT
+- name: CONTRIBUTION_DUE_BPS_GLOAS#gloas
+  sources: []
+  spec: |
+    <spec config_var="CONTRIBUTION_DUE_BPS_GLOAS" fork="gloas" hash="0ead2ac1">
+    CONTRIBUTION_DUE_BPS_GLOAS: uint64 = 5000
+    </spec>
+
+- name: CUSTODY_REQUIREMENT#fulu
   sources:
     - file: config/params/config.go
       search: CustodyRequirement\s+uint64.*yaml:"CUSTODY_REQUIREMENT"
@@ -197,7 +218,7 @@
     CUSTODY_REQUIREMENT = 4
     </spec>
 
-- name: DATA_COLUMN_SIDECAR_SUBNET_COUNT
+- name: DATA_COLUMN_SIDECAR_SUBNET_COUNT#fulu
   sources:
     - file: config/params/config.go
       search: DataColumnSidecarSubnetCount\s+uint64
@@ -207,7 +228,7 @@
     DATA_COLUMN_SIDECAR_SUBNET_COUNT = 128
     </spec>
 
-- name: DENEB_FORK_EPOCH
+- name: DENEB_FORK_EPOCH#deneb
   sources:
     - file: config/params/config.go
       search: DenebForkEpoch\s+primitives.Epoch
@@ -217,7 +238,7 @@
     DENEB_FORK_EPOCH: Epoch = 269568
     </spec>
 
-- name: DENEB_FORK_VERSION
+- name: DENEB_FORK_VERSION#deneb
   sources:
     - file: config/params/config.go
       search: DenebForkVersion\s+\[]byte
@@ -227,7 +248,7 @@
     DENEB_FORK_VERSION: Version = '0x04000000'
     </spec>
 
-- name: EJECTION_BALANCE
+- name: EJECTION_BALANCE#phase0
   sources:
     - file: config/params/config.go
       search: EjectionBalance\s+uint64
@@ -237,7 +258,7 @@
     EJECTION_BALANCE: Gwei = 16000000000
     </spec>
 
-- name: ELECTRA_FORK_EPOCH
+- name: ELECTRA_FORK_EPOCH#electra
   sources:
     - file: config/params/config.go
       search: ElectraForkEpoch\s+primitives.Epoch
@@ -247,7 +268,7 @@
     ELECTRA_FORK_EPOCH: Epoch = 364032
     </spec>
 
-- name: ELECTRA_FORK_VERSION
+- name: ELECTRA_FORK_VERSION#electra
   sources:
     - file: config/params/config.go
       search: ElectraForkVersion\s+\[]byte
@@ -257,7 +278,7 @@
     ELECTRA_FORK_VERSION: Version = '0x05000000'
     </spec>
 
-- name: EPOCHS_PER_SUBNET_SUBSCRIPTION
+- name: EPOCHS_PER_SUBNET_SUBSCRIPTION#phase0
   sources:
     - file: config/params/config.go
       search: EpochsPerSubnetSubscription\s+uint64
@@ -267,7 +288,7 @@
     EPOCHS_PER_SUBNET_SUBSCRIPTION = 256
     </spec>
 
-- name: ETH1_FOLLOW_DISTANCE
+- name: ETH1_FOLLOW_DISTANCE#phase0
   sources:
     - file: config/params/config.go
       search: Eth1FollowDistance\s+uint64
@@ -277,7 +298,7 @@
     ETH1_FOLLOW_DISTANCE: uint64 = 2048
     </spec>
 
-- name: FULU_FORK_EPOCH
+- name: FULU_FORK_EPOCH#fulu
   sources:
     - file: config/params/config.go
       search: FuluForkEpoch\s+primitives.Epoch
@@ -287,7 +308,7 @@
     FULU_FORK_EPOCH: Epoch = 411392
     </spec>
 
-- name: FULU_FORK_VERSION
+- name: FULU_FORK_VERSION#fulu
   sources:
     - file: config/params/config.go
       search: FuluForkVersion\s+\[]byte
@@ -297,7 +318,7 @@
     FULU_FORK_VERSION: Version = '0x06000000'
     </spec>
 
-- name: GENESIS_DELAY
+- name: GENESIS_DELAY#phase0
   sources:
     - file: config/params/config.go
       search: GenesisDelay\s+uint64
@@ -307,7 +328,7 @@
     GENESIS_DELAY: uint64 = 604800
     </spec>
 
-- name: GENESIS_FORK_VERSION
+- name: GENESIS_FORK_VERSION#phase0
   sources:
     - file: config/params/config.go
       search: GenesisForkVersion\s+\[]byte
@@ -317,7 +338,21 @@
     GENESIS_FORK_VERSION: Version = '0x00000000'
     </spec>
 
-- name: INACTIVITY_SCORE_BIAS
+- name: GLOAS_FORK_EPOCH#gloas
+  sources: []
+  spec: |
+    <spec config_var="GLOAS_FORK_EPOCH" fork="gloas" hash="c25152cf">
+    GLOAS_FORK_EPOCH: Epoch = 18446744073709551615
+    </spec>
+
+- name: GLOAS_FORK_VERSION#gloas
+  sources: []
+  spec: |
+    <spec config_var="GLOAS_FORK_VERSION" fork="gloas" hash="c1c5c007">
+    GLOAS_FORK_VERSION: Version = '0x07000000'
+    </spec>
+
+- name: INACTIVITY_SCORE_BIAS#altair
   sources:
     - file: config/params/config.go
       search: InactivityScoreBias\s+uint64
@@ -327,7 +362,7 @@
     INACTIVITY_SCORE_BIAS: uint64 = 4
     </spec>
 
-- name: INACTIVITY_SCORE_RECOVERY_RATE
+- name: INACTIVITY_SCORE_RECOVERY_RATE#altair
   sources:
     - file: config/params/config.go
       search: InactivityScoreRecoveryRate\s+uint64
@@ -337,7 +372,7 @@
     INACTIVITY_SCORE_RECOVERY_RATE: uint64 = 16
     </spec>
 
-- name: MAXIMUM_GOSSIP_CLOCK_DISPARITY
+- name: MAXIMUM_GOSSIP_CLOCK_DISPARITY#phase0
   sources:
     - file: config/params/config.go
       search: MaximumGossipClockDisparity\s+uint64
@@ -347,7 +382,7 @@
     MAXIMUM_GOSSIP_CLOCK_DISPARITY = 500
     </spec>
 
-- name: MAX_BLOBS_PER_BLOCK
+- name: MAX_BLOBS_PER_BLOCK#deneb
   sources:
     - file: config/params/config.go
       search: DeprecatedMaxBlobsPerBlock\s+int
@@ -357,7 +392,7 @@
     MAX_BLOBS_PER_BLOCK: uint64 = 6
     </spec>
 
-- name: MAX_BLOBS_PER_BLOCK_ELECTRA
+- name: MAX_BLOBS_PER_BLOCK_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: DeprecatedMaxBlobsPerBlockElectra\s+int
@@ -367,7 +402,7 @@
     MAX_BLOBS_PER_BLOCK_ELECTRA: uint64 = 9
     </spec>
 
-- name: MAX_PAYLOAD_SIZE
+- name: MAX_PAYLOAD_SIZE#phase0
   sources:
     - file: config/params/config.go
       search: MaxPayloadSize\s+uint64
@@ -377,7 +412,7 @@
     MAX_PAYLOAD_SIZE = 10485760
     </spec>
 
-- name: MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT
+- name: MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT#deneb
   sources:
     - file: config/params/config.go
       search: MaxPerEpochActivationChurnLimit\s+uint64
@@ -387,7 +422,7 @@
     MAX_PER_EPOCH_ACTIVATION_CHURN_LIMIT: uint64 = 8
     </spec>
 
-- name: MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT
+- name: MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT#electra
   sources:
     - file: config/params/config.go
       search: MaxPerEpochActivationExitChurnLimit\s+uint64
@@ -397,7 +432,7 @@
     MAX_PER_EPOCH_ACTIVATION_EXIT_CHURN_LIMIT: Gwei = 256000000000
     </spec>
 
-- name: MAX_REQUEST_BLOB_SIDECARS
+- name: MAX_REQUEST_BLOB_SIDECARS#deneb
   sources:
     - file: config/params/config.go
       search: MaxRequestBlobSidecars\s+uint64
@@ -407,7 +442,7 @@
     MAX_REQUEST_BLOB_SIDECARS = 768
     </spec>
 
-- name: MAX_REQUEST_BLOB_SIDECARS_ELECTRA
+- name: MAX_REQUEST_BLOB_SIDECARS_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: MaxRequestBlobSidecarsElectra\s+uint64
@@ -417,7 +452,7 @@
     MAX_REQUEST_BLOB_SIDECARS_ELECTRA = 1152
     </spec>
 
-- name: MAX_REQUEST_BLOCKS
+- name: MAX_REQUEST_BLOCKS#phase0
   sources:
     - file: config/params/config.go
       search: MaxRequestBlocks\s+uint64
@@ -427,7 +462,7 @@
     MAX_REQUEST_BLOCKS = 1024
     </spec>
 
-- name: MAX_REQUEST_BLOCKS_DENEB
+- name: MAX_REQUEST_BLOCKS_DENEB#deneb
   sources:
     - file: config/params/config.go
       search: MaxRequestBlocksDeneb\s+uint64
@@ -437,7 +472,7 @@
     MAX_REQUEST_BLOCKS_DENEB = 128
     </spec>
 
-- name: MAX_REQUEST_DATA_COLUMN_SIDECARS
+- name: MAX_REQUEST_DATA_COLUMN_SIDECARS#fulu
   sources:
     - file: config/params/config.go
       search: MaxRequestDataColumnSidecars\s+uint64
@@ -447,7 +482,14 @@
     MAX_REQUEST_DATA_COLUMN_SIDECARS = 16384
     </spec>
 
-- name: MESSAGE_DOMAIN_INVALID_SNAPPY
+- name: MAX_REQUEST_PAYLOADS#gloas
+  sources: []
+  spec: |
+    <spec config_var="MAX_REQUEST_PAYLOADS" fork="gloas" hash="23399ee5">
+    MAX_REQUEST_PAYLOADS = 128
+    </spec>
+
+- name: MESSAGE_DOMAIN_INVALID_SNAPPY#phase0
   sources:
     - file: config/params/config.go
       search: MessageDomainInvalidSnappy\s+\[4\]byte
@@ -457,7 +499,7 @@
     MESSAGE_DOMAIN_INVALID_SNAPPY: DomainType = '0x00000000'
     </spec>
 
-- name: MESSAGE_DOMAIN_VALID_SNAPPY
+- name: MESSAGE_DOMAIN_VALID_SNAPPY#phase0
   sources:
     - file: config/params/config.go
       search: MessageDomainValidSnappy\s+\[4\]byte
@@ -467,7 +509,14 @@
     MESSAGE_DOMAIN_VALID_SNAPPY: DomainType = '0x01000000'
     </spec>
 
-- name: MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS
+- name: MIN_BUILDER_WITHDRAWABILITY_DELAY#gloas
+  sources: []
+  spec: |
+    <spec config_var="MIN_BUILDER_WITHDRAWABILITY_DELAY" fork="gloas" hash="d378428f">
+    MIN_BUILDER_WITHDRAWABILITY_DELAY: uint64 = 4096
+    </spec>
+
+- name: MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS#deneb
   sources:
     - file: config/params/config.go
       search: MinEpochsForBlobsSidecarsRequest\s+primitives.Epoch
@@ -477,7 +526,7 @@
     MIN_EPOCHS_FOR_BLOB_SIDECARS_REQUESTS = 4096
     </spec>
 
-- name: MIN_EPOCHS_FOR_BLOCK_REQUESTS
+- name: MIN_EPOCHS_FOR_BLOCK_REQUESTS#phase0
   sources:
     - file: config/params/config.go
       search: MinEpochsForBlockRequests\s+uint64
@@ -487,7 +536,7 @@
     MIN_EPOCHS_FOR_BLOCK_REQUESTS = 33024
     </spec>
 
-- name: MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS
+- name: MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS#fulu
   sources:
     - file: config/params/config.go
       search: MinEpochsForDataColumnSidecarsRequest\s+primitives.Epoch
@@ -497,7 +546,7 @@
     MIN_EPOCHS_FOR_DATA_COLUMN_SIDECARS_REQUESTS = 4096
     </spec>
 
-- name: MIN_GENESIS_ACTIVE_VALIDATOR_COUNT
+- name: MIN_GENESIS_ACTIVE_VALIDATOR_COUNT#phase0
   sources:
     - file: config/params/config.go
       search: MinGenesisActiveValidatorCount\s+uint64
@@ -507,7 +556,7 @@
     MIN_GENESIS_ACTIVE_VALIDATOR_COUNT: uint64 = 16384
     </spec>
 
-- name: MIN_GENESIS_TIME
+- name: MIN_GENESIS_TIME#phase0
   sources:
     - file: config/params/config.go
       search: MinGenesisTime\s+uint64
@@ -517,7 +566,7 @@
     MIN_GENESIS_TIME: uint64 = 1606824000
     </spec>
 
-- name: MIN_PER_EPOCH_CHURN_LIMIT
+- name: MIN_PER_EPOCH_CHURN_LIMIT#phase0
   sources:
     - file: config/params/config.go
       search: MinPerEpochChurnLimit\s+uint64
@@ -527,7 +576,7 @@
     MIN_PER_EPOCH_CHURN_LIMIT: uint64 = 4
     </spec>
 
-- name: MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA
+- name: MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: MinPerEpochChurnLimitElectra\s+uint64
@@ -537,7 +586,7 @@
     MIN_PER_EPOCH_CHURN_LIMIT_ELECTRA: Gwei = 128000000000
     </spec>
 
-- name: MIN_VALIDATOR_WITHDRAWABILITY_DELAY
+- name: MIN_VALIDATOR_WITHDRAWABILITY_DELAY#phase0
   sources:
     - file: config/params/config.go
       search: MinValidatorWithdrawabilityDelay\s+primitives.Epoch
@@ -547,7 +596,7 @@
     MIN_VALIDATOR_WITHDRAWABILITY_DELAY: uint64 = 256
     </spec>
 
-- name: NUMBER_OF_CUSTODY_GROUPS
+- name: NUMBER_OF_CUSTODY_GROUPS#fulu
   sources:
     - file: config/params/config.go
       search: NumberOfCustodyGroups\s+uint64
@@ -557,7 +606,14 @@
     NUMBER_OF_CUSTODY_GROUPS = 128
     </spec>
 
-- name: PROPOSER_REORG_CUTOFF_BPS
+- name: PAYLOAD_ATTESTATION_DUE_BPS#gloas
+  sources: []
+  spec: |
+    <spec config_var="PAYLOAD_ATTESTATION_DUE_BPS" fork="gloas" hash="17307d0e">
+    PAYLOAD_ATTESTATION_DUE_BPS: uint64 = 7500
+    </spec>
+
+- name: PROPOSER_REORG_CUTOFF_BPS#phase0
   sources:
     - file: config/params/config.go
       search: ProposerReorgCutoffBPS\s+primitives.BP
@@ -567,7 +623,7 @@
     PROPOSER_REORG_CUTOFF_BPS: uint64 = 1667
     </spec>
 
-- name: PROPOSER_SCORE_BOOST
+- name: PROPOSER_SCORE_BOOST#phase0
   sources:
     - file: config/params/config.go
       search: ProposerScoreBoost\s+uint64
@@ -577,7 +633,7 @@
     PROPOSER_SCORE_BOOST: uint64 = 40
     </spec>
 
-- name: REORG_HEAD_WEIGHT_THRESHOLD
+- name: REORG_HEAD_WEIGHT_THRESHOLD#phase0
   sources:
     - file: config/params/config.go
       search: ReorgHeadWeightThreshold\s+uint64
@@ -587,7 +643,7 @@
     REORG_HEAD_WEIGHT_THRESHOLD: uint64 = 20
     </spec>
 
-- name: REORG_MAX_EPOCHS_SINCE_FINALIZATION
+- name: REORG_MAX_EPOCHS_SINCE_FINALIZATION#phase0
   sources:
     - file: config/params/config.go
       search: ReorgMaxEpochsSinceFinalization\s+primitives.Epoch
@@ -597,7 +653,7 @@
     REORG_MAX_EPOCHS_SINCE_FINALIZATION: Epoch = 2
     </spec>
 
-- name: REORG_PARENT_WEIGHT_THRESHOLD
+- name: REORG_PARENT_WEIGHT_THRESHOLD#phase0
   sources:
     - file: config/params/config.go
       search: ReorgParentWeightThreshold\s+uint64
@@ -607,7 +663,7 @@
     REORG_PARENT_WEIGHT_THRESHOLD: uint64 = 160
     </spec>
 
-- name: SAMPLES_PER_SLOT
+- name: SAMPLES_PER_SLOT#fulu
   sources:
     - file: config/params/config.go
       search: SamplesPerSlot\s+uint64
@@ -617,7 +673,7 @@
     SAMPLES_PER_SLOT = 8
     </spec>
 
-- name: SECONDS_PER_ETH1_BLOCK
+- name: SECONDS_PER_ETH1_BLOCK#phase0
   sources:
     - file: config/params/config.go
       search: SecondsPerETH1Block\s+uint64
@@ -627,7 +683,7 @@
     SECONDS_PER_ETH1_BLOCK: uint64 = 14
     </spec>
 
-- name: SECONDS_PER_SLOT
+- name: SECONDS_PER_SLOT#phase0
   sources:
     - file: config/params/config.go
       search: SecondsPerSlot\s+uint64
@@ -637,7 +693,7 @@
     SECONDS_PER_SLOT: uint64 = 12
     </spec>
 
-- name: SHARD_COMMITTEE_PERIOD
+- name: SHARD_COMMITTEE_PERIOD#phase0
   sources:
     - file: config/params/config.go
       search: ShardCommitteePeriod\s+primitives.Epoch
@@ -647,7 +703,7 @@
     SHARD_COMMITTEE_PERIOD: uint64 = 256
     </spec>
 
-- name: SLOT_DURATION_MS
+- name: SLOT_DURATION_MS#phase0
   sources:
     - file: config/params/config.go
       search: SlotDurationMilliseconds\s+uint64
@@ -657,7 +713,7 @@
     SLOT_DURATION_MS: uint64 = 12000
     </spec>
 
-- name: SUBNETS_PER_NODE
+- name: SUBNETS_PER_NODE#phase0
   sources:
     - file: config/params/config.go
       search: SubnetsPerNode\s+uint64
@@ -667,7 +723,7 @@
     SUBNETS_PER_NODE = 2
     </spec>
 
-- name: SYNC_MESSAGE_DUE_BPS
+- name: SYNC_MESSAGE_DUE_BPS#altair
   sources:
     - file: config/params/config.go
       search: SyncMessageDueBPS\s+primitives.BP
@@ -677,7 +733,14 @@
     SYNC_MESSAGE_DUE_BPS: uint64 = 3333
     </spec>
 
-- name: TERMINAL_BLOCK_HASH
+- name: SYNC_MESSAGE_DUE_BPS_GLOAS#gloas
+  sources: []
+  spec: |
+    <spec config_var="SYNC_MESSAGE_DUE_BPS_GLOAS" fork="gloas" hash="47f14d95">
+    SYNC_MESSAGE_DUE_BPS_GLOAS: uint64 = 2500
+    </spec>
+
+- name: TERMINAL_BLOCK_HASH#bellatrix
   sources:
     - file: config/params/config.go
       search: TerminalBlockHash\s+common.Hash
@@ -687,7 +750,7 @@
     TERMINAL_BLOCK_HASH: Hash32 = '0x0000000000000000000000000000000000000000000000000000000000000000'
     </spec>
 
-- name: TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH
+- name: TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH#bellatrix
   sources:
     - file: config/params/config.go
       search: TerminalBlockHashActivationEpoch\s+primitives.Epoch
@@ -697,7 +760,7 @@
     TERMINAL_BLOCK_HASH_ACTIVATION_EPOCH = 18446744073709551615
     </spec>
 
-- name: TERMINAL_TOTAL_DIFFICULTY
+- name: TERMINAL_TOTAL_DIFFICULTY#bellatrix
   sources:
     - file: config/params/config.go
       search: TerminalTotalDifficulty\s+string
@@ -707,7 +770,7 @@
     TERMINAL_TOTAL_DIFFICULTY = 58750000000000000000000
     </spec>
 
-- name: VALIDATOR_CUSTODY_REQUIREMENT
+- name: VALIDATOR_CUSTODY_REQUIREMENT#fulu
   sources:
     - file: config/params/config.go
       search: ValidatorCustodyRequirement\s+uint64

specrefs/containers.yml

@@ -50,7 +50,7 @@
         committee_bits: Bitvector[MAX_COMMITTEES_PER_SLOT]
     </spec>
 
-- name: AttestationData
+- name: AttestationData#phase0
   sources:
     - file: proto/eth/v1/attestation.proto
       search: message AttestationData {
@@ -88,7 +88,7 @@
         attestation_2: IndexedAttestation
     </spec>
 
-- name: BLSToExecutionChange
+- name: BLSToExecutionChange#capella
   sources:
     - file: proto/prysm/v1alpha1/withdrawals.proto
       search: message BLSToExecutionChange {
@@ -100,7 +100,7 @@
         to_execution_address: ExecutionAddress
     </spec>
 
-- name: BeaconBlock
+- name: BeaconBlock#phase0
   sources:
     - file: proto/eth/v1/beacon_block.proto
       search: message BeaconBlock {
@@ -239,7 +239,34 @@
         execution_requests: ExecutionRequests
     </spec>
 
-- name: BeaconBlockHeader
+- name: BeaconBlockBody#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="BeaconBlockBody" fork="gloas" hash="7e472a77">
+    class BeaconBlockBody(Container):
+        randao_reveal: BLSSignature
+        eth1_data: Eth1Data
+        graffiti: Bytes32
+        proposer_slashings: List[ProposerSlashing, MAX_PROPOSER_SLASHINGS]
+        attester_slashings: List[AttesterSlashing, MAX_ATTESTER_SLASHINGS_ELECTRA]
+        attestations: List[Attestation, MAX_ATTESTATIONS_ELECTRA]
+        deposits: List[Deposit, MAX_DEPOSITS]
+        voluntary_exits: List[SignedVoluntaryExit, MAX_VOLUNTARY_EXITS]
+        sync_aggregate: SyncAggregate
+        # [Modified in Gloas:EIP7732]
+        # Removed `execution_payload`
+        bls_to_execution_changes: List[SignedBLSToExecutionChange, MAX_BLS_TO_EXECUTION_CHANGES]
+        # [Modified in Gloas:EIP7732]
+        # Removed `blob_kzg_commitments`
+        # [Modified in Gloas:EIP7732]
+        # Removed `execution_requests`
+        # [New in Gloas:EIP7732]
+        signed_execution_payload_bid: SignedExecutionPayloadBid
+        # [New in Gloas:EIP7732]
+        payload_attestations: List[PayloadAttestation, MAX_PAYLOAD_ATTESTATIONS]
+    </spec>
+
+- name: BeaconBlockHeader#phase0
   sources:
     - file: proto/eth/v1/beacon_block.proto
       search: message BeaconBlockHeader {
@@ -538,7 +565,69 @@
         proposer_lookahead: Vector[ValidatorIndex, (MIN_SEED_LOOKAHEAD + 1) * SLOTS_PER_EPOCH]
     </spec>
 
-- name: BlobIdentifier
+- name: BeaconState#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="BeaconState" fork="gloas" hash="c33b0db2">
+    class BeaconState(Container):
+        genesis_time: uint64
+        genesis_validators_root: Root
+        slot: Slot
+        fork: Fork
+        latest_block_header: BeaconBlockHeader
+        block_roots: Vector[Root, SLOTS_PER_HISTORICAL_ROOT]
+        state_roots: Vector[Root, SLOTS_PER_HISTORICAL_ROOT]
+        historical_roots: List[Root, HISTORICAL_ROOTS_LIMIT]
+        eth1_data: Eth1Data
+        eth1_data_votes: List[Eth1Data, EPOCHS_PER_ETH1_VOTING_PERIOD * SLOTS_PER_EPOCH]
+        eth1_deposit_index: uint64
+        validators: List[Validator, VALIDATOR_REGISTRY_LIMIT]
+        balances: List[Gwei, VALIDATOR_REGISTRY_LIMIT]
+        randao_mixes: Vector[Bytes32, EPOCHS_PER_HISTORICAL_VECTOR]
+        slashings: Vector[Gwei, EPOCHS_PER_SLASHINGS_VECTOR]
+        previous_epoch_participation: List[ParticipationFlags, VALIDATOR_REGISTRY_LIMIT]
+        current_epoch_participation: List[ParticipationFlags, VALIDATOR_REGISTRY_LIMIT]
+        justification_bits: Bitvector[JUSTIFICATION_BITS_LENGTH]
+        previous_justified_checkpoint: Checkpoint
+        current_justified_checkpoint: Checkpoint
+        finalized_checkpoint: Checkpoint
+        inactivity_scores: List[uint64, VALIDATOR_REGISTRY_LIMIT]
+        current_sync_committee: SyncCommittee
+        next_sync_committee: SyncCommittee
+        # [Modified in Gloas:EIP7732]
+        # Removed `latest_execution_payload_header`
+        # [New in Gloas:EIP7732]
+        latest_execution_payload_bid: ExecutionPayloadBid
+        next_withdrawal_index: WithdrawalIndex
+        next_withdrawal_validator_index: ValidatorIndex
+        historical_summaries: List[HistoricalSummary, HISTORICAL_ROOTS_LIMIT]
+        deposit_requests_start_index: uint64
+        deposit_balance_to_consume: Gwei
+        exit_balance_to_consume: Gwei
+        earliest_exit_epoch: Epoch
+        consolidation_balance_to_consume: Gwei
+        earliest_consolidation_epoch: Epoch
+        pending_deposits: List[PendingDeposit, PENDING_DEPOSITS_LIMIT]
+        pending_partial_withdrawals: List[PendingPartialWithdrawal, PENDING_PARTIAL_WITHDRAWALS_LIMIT]
+        pending_consolidations: List[PendingConsolidation, PENDING_CONSOLIDATIONS_LIMIT]
+        proposer_lookahead: Vector[ValidatorIndex, (MIN_SEED_LOOKAHEAD + 1) * SLOTS_PER_EPOCH]
+        # [New in Gloas:EIP7732]
+        builders: List[Builder, BUILDER_REGISTRY_LIMIT]
+        # [New in Gloas:EIP7732]
+        next_withdrawal_builder_index: BuilderIndex
+        # [New in Gloas:EIP7732]
+        execution_payload_availability: Bitvector[SLOTS_PER_HISTORICAL_ROOT]
+        # [New in Gloas:EIP7732]
+        builder_pending_payments: Vector[BuilderPendingPayment, 2 * SLOTS_PER_EPOCH]
+        # [New in Gloas:EIP7732]
+        builder_pending_withdrawals: List[BuilderPendingWithdrawal, BUILDER_PENDING_WITHDRAWALS_LIMIT]
+        # [New in Gloas:EIP7732]
+        latest_block_hash: Hash32
+        # [New in Gloas:EIP7732]
+        payload_expected_withdrawals: List[Withdrawal, MAX_WITHDRAWALS_PER_PAYLOAD]
+    </spec>
+
+- name: BlobIdentifier#deneb
   sources:
     - file: proto/prysm/v1alpha1/blobs.proto
       search: message BlobIdentifier {
@@ -549,7 +638,7 @@
         index: BlobIndex
     </spec>
 
-- name: BlobSidecar
+- name: BlobSidecar#deneb
   sources:
     - file: proto/prysm/v1alpha1/beacon_block.proto
       search: message BlobSidecar {
@@ -564,7 +653,39 @@
         kzg_commitment_inclusion_proof: Vector[Bytes32, KZG_COMMITMENT_INCLUSION_PROOF_DEPTH]
     </spec>
 
-- name: Checkpoint
+- name: Builder#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="Builder" fork="gloas" hash="ae177179">
+    class Builder(Container):
+        pubkey: BLSPubkey
+        version: uint8
+        execution_address: ExecutionAddress
+        balance: Gwei
+        deposit_epoch: Epoch
+        withdrawable_epoch: Epoch
+    </spec>
+
+- name: BuilderPendingPayment#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="BuilderPendingPayment" fork="gloas" hash="73cf1649">
+    class BuilderPendingPayment(Container):
+        weight: Gwei
+        withdrawal: BuilderPendingWithdrawal
+    </spec>
+
+- name: BuilderPendingWithdrawal#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="BuilderPendingWithdrawal" fork="gloas" hash="0579f0ac">
+    class BuilderPendingWithdrawal(Container):
+        fee_recipient: ExecutionAddress
+        amount: Gwei
+        builder_index: BuilderIndex
+    </spec>
+
+- name: Checkpoint#phase0
   sources:
     - file: proto/eth/v1/attestation.proto
       search: message Checkpoint {
@@ -575,7 +696,7 @@
         root: Root
     </spec>
 
-- name: ConsolidationRequest
+- name: ConsolidationRequest#electra
   sources:
     - file: proto/engine/v1/electra.proto
       search: message ConsolidationRequest {
@@ -587,7 +708,7 @@
         target_pubkey: BLSPubkey
     </spec>
 
-- name: ContributionAndProof
+- name: ContributionAndProof#altair
   sources:
     - file: proto/prysm/v1alpha1/sync_committee.proto
       search: message ContributionAndProof {
@@ -599,7 +720,7 @@
         selection_proof: BLSSignature
     </spec>
 
-- name: DataColumnSidecar
+- name: DataColumnSidecar#fulu
   sources:
     - file: proto/prysm/v1alpha1/data_columns.proto
       search: message DataColumnSidecar {
@@ -614,7 +735,26 @@
         kzg_commitments_inclusion_proof: Vector[Bytes32, KZG_COMMITMENTS_INCLUSION_PROOF_DEPTH]
     </spec>
 
-- name: DataColumnsByRootIdentifier
+- name: DataColumnSidecar#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="DataColumnSidecar" fork="gloas" hash="8028928b">
+    class DataColumnSidecar(Container):
+        index: ColumnIndex
+        column: List[Cell, MAX_BLOB_COMMITMENTS_PER_BLOCK]
+        kzg_commitments: List[KZGCommitment, MAX_BLOB_COMMITMENTS_PER_BLOCK]
+        kzg_proofs: List[KZGProof, MAX_BLOB_COMMITMENTS_PER_BLOCK]
+        # [Modified in Gloas:EIP7732]
+        # Removed `signed_block_header`
+        # [Modified in Gloas:EIP7732]
+        # Removed `kzg_commitments_inclusion_proof`
+        # [New in Gloas:EIP7732]
+        slot: Slot
+        # [New in Gloas:EIP7732]
+        beacon_block_root: Root
+    </spec>
+
+- name: DataColumnsByRootIdentifier#fulu
   sources:
     - file: proto/prysm/v1alpha1/data_columns.proto
       search: message DataColumnsByRootIdentifier {
@@ -625,7 +765,7 @@
         columns: List[ColumnIndex, NUMBER_OF_COLUMNS]
     </spec>
 
-- name: Deposit
+- name: Deposit#phase0
   sources:
     - file: proto/eth/v1/beacon_block.proto
       search: message Deposit {
@@ -636,7 +776,7 @@
         data: DepositData
     </spec>
 
-- name: DepositData
+- name: DepositData#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message Data {
@@ -649,7 +789,7 @@
         signature: BLSSignature
     </spec>
 
-- name: DepositMessage
+- name: DepositMessage#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_state.proto
       search: message DepositMessage {
@@ -661,7 +801,7 @@
         amount: Gwei
     </spec>
 
-- name: DepositRequest
+- name: DepositRequest#electra
   sources:
     - file: proto/engine/v1/electra.proto
       search: message DepositRequest {
@@ -675,7 +815,17 @@
         index: uint64
     </spec>
 
-- name: Eth1Data
+- name: Eth1Block#phase0
+  sources: []
+  spec: |
+    <spec ssz_object="Eth1Block" fork="phase0" hash="0a5c6b45">
+    class Eth1Block(Container):
+        timestamp: uint64
+        deposit_root: Root
+        deposit_count: uint64
+    </spec>
+
+- name: Eth1Data#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message Eth1Data {
@@ -763,6 +913,38 @@
         excess_blob_gas: uint64
     </spec>
 
+- name: ExecutionPayloadBid#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="ExecutionPayloadBid" fork="gloas" hash="aa71ba16">
+    class ExecutionPayloadBid(Container):
+        parent_block_hash: Hash32
+        parent_block_root: Root
+        block_hash: Hash32
+        prev_randao: Bytes32
+        fee_recipient: ExecutionAddress
+        gas_limit: uint64
+        builder_index: BuilderIndex
+        slot: Slot
+        value: Gwei
+        execution_payment: Gwei
+        blob_kzg_commitments_root: Root
+    </spec>
+
+- name: ExecutionPayloadEnvelope#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="ExecutionPayloadEnvelope" fork="gloas" hash="cd522f7f">
+    class ExecutionPayloadEnvelope(Container):
+        payload: ExecutionPayload
+        execution_requests: ExecutionRequests
+        builder_index: BuilderIndex
+        beacon_block_root: Root
+        slot: Slot
+        blob_kzg_commitments: List[KZGCommitment, MAX_BLOB_COMMITMENTS_PER_BLOCK]
+        state_root: Root
+    </spec>
+
 - name: ExecutionPayloadHeader#bellatrix
   sources:
     - file: proto/engine/v1/execution_engine.proto
@@ -839,7 +1021,7 @@
         excess_blob_gas: uint64
     </spec>
 
-- name: ExecutionRequests
+- name: ExecutionRequests#electra
   sources:
     - file: proto/engine/v1/electra.proto
       search: message ExecutionRequests {
@@ -854,7 +1036,7 @@
         consolidations: List[ConsolidationRequest, MAX_CONSOLIDATION_REQUESTS_PER_PAYLOAD]
     </spec>
 
-- name: Fork
+- name: Fork#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message Fork {
@@ -866,7 +1048,16 @@
         epoch: Epoch
     </spec>
 
-- name: ForkData
+- name: ForkChoiceNode#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="ForkChoiceNode" fork="gloas" hash="755a4b34">
+    class ForkChoiceNode(Container):
+        root: Root
+        payload_status: PayloadStatus  # One of PAYLOAD_STATUS_* values
+    </spec>
+
+- name: ForkData#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_state.proto
       search: message ForkData {
@@ -877,7 +1068,7 @@
         genesis_validators_root: Root
     </spec>
 
-- name: HistoricalBatch
+- name: HistoricalBatch#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_state.proto
       search: message HistoricalBatch {
@@ -888,7 +1079,7 @@
         state_roots: Vector[Root, SLOTS_PER_HISTORICAL_ROOT]
     </spec>
 
-- name: HistoricalSummary
+- name: HistoricalSummary#capella
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message HistoricalSummary {
@@ -924,7 +1115,17 @@
         signature: BLSSignature
     </spec>
 
-- name: LightClientBootstrap
+- name: IndexedPayloadAttestation#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="IndexedPayloadAttestation" fork="gloas" hash="fa4832c8">
+    class IndexedPayloadAttestation(Container):
+        attesting_indices: List[ValidatorIndex, PTC_SIZE]
+        data: PayloadAttestationData
+        signature: BLSSignature
+    </spec>
+
+- name: LightClientBootstrap#altair
   sources:
     - file: proto/prysm/v1alpha1/light_client.proto
       search: message LightClientBootstrapAltair {
@@ -938,7 +1139,18 @@
         current_sync_committee_branch: CurrentSyncCommitteeBranch
     </spec>
 
-- name: LightClientFinalityUpdate
+- name: LightClientBootstrap#capella
+  sources: []
+  spec: |
+    <spec ssz_object="LightClientBootstrap" fork="capella" hash="85f4f5fe">
+    class LightClientBootstrap(Container):
+        # [Modified in Capella]
+        header: LightClientHeader
+        current_sync_committee: SyncCommittee
+        current_sync_committee_branch: CurrentSyncCommitteeBranch
+    </spec>
+
+- name: LightClientFinalityUpdate#altair
   sources:
     - file: proto/prysm/v1alpha1/light_client.proto
       search: message LightClientFinalityUpdateAltair {
@@ -956,6 +1168,20 @@
         signature_slot: Slot
     </spec>
 
+- name: LightClientFinalityUpdate#capella
+  sources: []
+  spec: |
+    <spec ssz_object="LightClientFinalityUpdate" fork="capella" hash="9d2b55dd">
+    class LightClientFinalityUpdate(Container):
+        # [Modified in Capella]
+        attested_header: LightClientHeader
+        # [Modified in Capella]
+        finalized_header: LightClientHeader
+        finality_branch: FinalityBranch
+        sync_aggregate: SyncAggregate
+        signature_slot: Slot
+    </spec>
+
 - name: LightClientHeader#altair
   sources:
     - file: proto/prysm/v1alpha1/light_client.proto
@@ -980,7 +1206,7 @@
         execution_branch: ExecutionBranch
     </spec>
 
-- name: LightClientOptimisticUpdate
+- name: LightClientOptimisticUpdate#altair
   sources:
     - file: proto/prysm/v1alpha1/light_client.proto
       search: message LightClientOptimisticUpdateAltair {
@@ -995,7 +1221,18 @@
         signature_slot: Slot
     </spec>
 
-- name: LightClientUpdate
+- name: LightClientOptimisticUpdate#capella
+  sources: []
+  spec: |
+    <spec ssz_object="LightClientOptimisticUpdate" fork="capella" hash="bdce7b1d">
+    class LightClientOptimisticUpdate(Container):
+        # [Modified in Capella]
+        attested_header: LightClientHeader
+        sync_aggregate: SyncAggregate
+        signature_slot: Slot
+    </spec>
+
+- name: LightClientUpdate#altair
   sources:
     - file: proto/prysm/v1alpha1/light_client.proto
       search: message LightClientUpdateAltair {
@@ -1016,7 +1253,65 @@
         signature_slot: Slot
     </spec>
 
-- name: PendingAttestation
+- name: LightClientUpdate#capella
+  sources: []
+  spec: |
+    <spec ssz_object="LightClientUpdate" fork="capella" hash="8d215165">
+    class LightClientUpdate(Container):
+        # [Modified in Capella]
+        attested_header: LightClientHeader
+        next_sync_committee: SyncCommittee
+        next_sync_committee_branch: NextSyncCommitteeBranch
+        # [Modified in Capella]
+        finalized_header: LightClientHeader
+        finality_branch: FinalityBranch
+        sync_aggregate: SyncAggregate
+        signature_slot: Slot
+    </spec>
+
+- name: MatrixEntry#fulu
+  sources: []
+  spec: |
+    <spec ssz_object="MatrixEntry" fork="fulu" hash="0da9cc8e">
+    class MatrixEntry(Container):
+        cell: Cell
+        kzg_proof: KZGProof
+        column_index: ColumnIndex
+        row_index: RowIndex
+    </spec>
+
+- name: PayloadAttestation#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="PayloadAttestation" fork="gloas" hash="c769473d">
+    class PayloadAttestation(Container):
+        aggregation_bits: Bitvector[PTC_SIZE]
+        data: PayloadAttestationData
+        signature: BLSSignature
+    </spec>
+
+- name: PayloadAttestationData#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="PayloadAttestationData" fork="gloas" hash="9f1b7f92">
+    class PayloadAttestationData(Container):
+        beacon_block_root: Root
+        slot: Slot
+        payload_present: boolean
+        blob_data_available: boolean
+    </spec>
+
+- name: PayloadAttestationMessage#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="PayloadAttestationMessage" fork="gloas" hash="3707678d">
+    class PayloadAttestationMessage(Container):
+        validator_index: ValidatorIndex
+        data: PayloadAttestationData
+        signature: BLSSignature
+    </spec>
+
+- name: PendingAttestation#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_state.proto
       search: message PendingAttestation {
@@ -1029,7 +1324,7 @@
         proposer_index: ValidatorIndex
     </spec>
 
-- name: PendingConsolidation
+- name: PendingConsolidation#electra
   sources:
     - file: proto/prysm/v1alpha1/eip_7251.proto
       search: message PendingConsolidation {
@@ -1040,7 +1335,7 @@
         target_index: ValidatorIndex
     </spec>
 
-- name: PendingDeposit
+- name: PendingDeposit#electra
   sources:
     - file: proto/prysm/v1alpha1/eip_7251.proto
       search: message PendingDeposit {
@@ -1054,7 +1349,7 @@
         slot: Slot
     </spec>
 
-- name: PendingPartialWithdrawal
+- name: PendingPartialWithdrawal#electra
   sources:
     - file: proto/prysm/v1alpha1/eip_7251.proto
       search: message PendingPartialWithdrawal {
@@ -1066,7 +1361,7 @@
         withdrawable_epoch: Epoch
     </spec>
 
-- name: PowBlock
+- name: PowBlock#bellatrix
   sources:
     - file: proto/prysm/v1alpha1/beacon_state.proto
       search: message PowBlock {
@@ -1078,7 +1373,18 @@
         total_difficulty: uint256
     </spec>
 
-- name: ProposerSlashing
+- name: ProposerPreferences#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="ProposerPreferences" fork="gloas" hash="2a38b149">
+    class ProposerPreferences(Container):
+        proposal_slot: Slot
+        validator_index: ValidatorIndex
+        fee_recipient: ExecutionAddress
+        gas_limit: uint64
+    </spec>
+
+- name: ProposerSlashing#phase0
   sources:
     - file: proto/eth/v1/beacon_block.proto
       search: message ProposerSlashing {
@@ -1112,7 +1418,7 @@
         signature: BLSSignature
     </spec>
 
-- name: SignedBLSToExecutionChange
+- name: SignedBLSToExecutionChange#capella
   sources:
     - file: proto/prysm/v1alpha1/withdrawals.proto
       search: message SignedBLSToExecutionChange {
@@ -1123,7 +1429,7 @@
         signature: BLSSignature
     </spec>
 
-- name: SignedBeaconBlock
+- name: SignedBeaconBlock#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_block.proto
       search: message SignedBeaconBlock {
@@ -1134,7 +1440,7 @@
         signature: BLSSignature
     </spec>
 
-- name: SignedBeaconBlockHeader
+- name: SignedBeaconBlockHeader#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message SignedBeaconBlockHeader {
@@ -1145,7 +1451,7 @@
         signature: BLSSignature
     </spec>
 
-- name: SignedContributionAndProof
+- name: SignedContributionAndProof#altair
   sources:
     - file: proto/prysm/v1alpha1/sync_committee.proto
       search: message SignedContributionAndProof {
@@ -1156,7 +1462,34 @@
         signature: BLSSignature
     </spec>
 
-- name: SignedVoluntaryExit
+- name: SignedExecutionPayloadBid#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="SignedExecutionPayloadBid" fork="gloas" hash="6b344341">
+    class SignedExecutionPayloadBid(Container):
+        message: ExecutionPayloadBid
+        signature: BLSSignature
+    </spec>
+
+- name: SignedExecutionPayloadEnvelope#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="SignedExecutionPayloadEnvelope" fork="gloas" hash="ab8f3404">
+    class SignedExecutionPayloadEnvelope(Container):
+        message: ExecutionPayloadEnvelope
+        signature: BLSSignature
+    </spec>
+
+- name: SignedProposerPreferences#gloas
+  sources: []
+  spec: |
+    <spec ssz_object="SignedProposerPreferences" fork="gloas" hash="2142774c">
+    class SignedProposerPreferences(Container):
+        message: ProposerPreferences
+        signature: BLSSignature
+    </spec>
+
+- name: SignedVoluntaryExit#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message SignedVoluntaryExit {
@@ -1167,7 +1500,7 @@
         signature: BLSSignature
     </spec>
 
-- name: SigningData
+- name: SigningData#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_state.proto
       search: message SigningData {
@@ -1178,7 +1511,7 @@
         domain: Domain
     </spec>
 
-- name: SingleAttestation
+- name: SingleAttestation#electra
   sources:
     - file: proto/prysm/v1alpha1/attestation.proto
       search: message SingleAttestation {
@@ -1191,7 +1524,7 @@
         signature: BLSSignature
     </spec>
 
-- name: SyncAggregate
+- name: SyncAggregate#altair
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message SyncAggregate {
@@ -1202,7 +1535,7 @@
         sync_committee_signature: BLSSignature
     </spec>
 
-- name: SyncAggregatorSelectionData
+- name: SyncAggregatorSelectionData#altair
   sources:
     - file: proto/prysm/v1alpha1/beacon_state.proto
       search: message SyncAggregatorSelectionData {
@@ -1213,7 +1546,7 @@
         subcommittee_index: uint64
     </spec>
 
-- name: SyncCommittee
+- name: SyncCommittee#altair
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message SyncCommittee {
@@ -1224,7 +1557,7 @@
         aggregate_pubkey: BLSPubkey
     </spec>
 
-- name: SyncCommitteeContribution
+- name: SyncCommitteeContribution#altair
   sources:
     - file: proto/prysm/v1alpha1/sync_committee.proto
       search: message SyncCommitteeContribution {
@@ -1238,7 +1571,7 @@
         signature: BLSSignature
     </spec>
 
-- name: SyncCommitteeMessage
+- name: SyncCommitteeMessage#altair
   sources:
     - file: proto/prysm/v1alpha1/sync_committee.proto
       search: message SyncCommitteeMessage {
@@ -1251,7 +1584,7 @@
         signature: BLSSignature
     </spec>
 
-- name: Validator
+- name: Validator#phase0
   sources:
     - file: proto/prysm/v1alpha1/beacon_core_types.proto
       search: message Validator {
@@ -1268,7 +1601,7 @@
         withdrawable_epoch: Epoch
     </spec>
 
-- name: VoluntaryExit
+- name: VoluntaryExit#phase0
   sources:
     - file: proto/eth/v1/beacon_block.proto
       search: message VoluntaryExit {
@@ -1279,7 +1612,7 @@
         validator_index: ValidatorIndex
     </spec>
 
-- name: Withdrawal
+- name: Withdrawal#capella
   sources:
     - file: proto/engine/v1/execution_engine.proto
       search: message Withdrawal {
@@ -1292,7 +1625,7 @@
         amount: Gwei
     </spec>
 
-- name: WithdrawalRequest
+- name: WithdrawalRequest#electra
   sources:
     - file: proto/engine/v1/electra.proto
       search: message WithdrawalRequest {

specrefs/dataclasses.yml

@@ -1,4 +1,4 @@
-- name: BlobParameters
+- name: BlobParameters#fulu
   sources: []
   spec: |
     <spec dataclass="BlobParameters" fork="fulu" hash="a4575aa8">
@@ -54,6 +54,20 @@
         processed_sweep_withdrawals_count: uint64
     </spec>
 
+- name: ExpectedWithdrawals#gloas
+  sources: []
+  spec: |
+    <spec dataclass="ExpectedWithdrawals" fork="gloas" hash="b32cc9c9">
+    class ExpectedWithdrawals(object):
+        withdrawals: Sequence[Withdrawal]
+        # [New in Gloas:EIP7732]
+        processed_builder_withdrawals_count: uint64
+        processed_partial_withdrawals_count: uint64
+        # [New in Gloas:EIP7732]
+        processed_builders_sweep_count: uint64
+        processed_sweep_withdrawals_count: uint64
+    </spec>
+
 - name: GetPayloadResponse#bellatrix
   sources:
     - file: consensus-types/blocks/get_payload.go
@@ -126,7 +140,7 @@
         execution_requests: Sequence[bytes]
     </spec>
 
-- name: LatestMessage
+- name: LatestMessage#phase0
   sources: []
   spec: |
     <spec dataclass="LatestMessage" fork="phase0" hash="44e832d0">
@@ -136,7 +150,18 @@
         root: Root
     </spec>
 
-- name: LightClientStore
+- name: LatestMessage#gloas
+  sources: []
+  spec: |
+    <spec dataclass="LatestMessage" fork="gloas" hash="a0030894">
+    @dataclass(eq=True, frozen=True)
+    class LatestMessage(object):
+        slot: Slot
+        root: Root
+        payload_present: boolean
+    </spec>
+
+- name: LightClientStore#altair
   sources: []
   spec: |
     <spec dataclass="LightClientStore" fork="altair" hash="24725cec">
@@ -155,6 +180,23 @@
         current_max_active_participants: uint64
     </spec>
 
+- name: LightClientStore#capella
+  sources: []
+  spec: |
+    <spec dataclass="LightClientStore" fork="capella" hash="04b41062">
+    class LightClientStore(object):
+        # [Modified in Capella]
+        finalized_header: LightClientHeader
+        current_sync_committee: SyncCommittee
+        next_sync_committee: SyncCommittee
+        # [Modified in Capella]
+        best_valid_update: Optional[LightClientUpdate]
+        # [Modified in Capella]
+        optimistic_header: LightClientHeader
+        previous_max_active_participants: uint64
+        current_max_active_participants: uint64
+    </spec>
+
 - name: NewPayloadRequest#bellatrix
   sources:
     - file: beacon-chain/execution/engine_client.go
@@ -191,7 +233,7 @@
         execution_requests: ExecutionRequests
     </spec>
 
-- name: OptimisticStore
+- name: OptimisticStore#bellatrix
   sources: []
   spec: |
     <spec dataclass="OptimisticStore" fork="bellatrix" hash="a2b2182c">
@@ -246,7 +288,7 @@
         parent_beacon_block_root: Root
     </spec>
 
-- name: Store
+- name: Store#phase0
   sources: []
   spec: |
     <spec dataclass="Store" fork="phase0" hash="abe525d6">
@@ -266,3 +308,30 @@
         latest_messages: Dict[ValidatorIndex, LatestMessage] = field(default_factory=dict)
         unrealized_justifications: Dict[Root, Checkpoint] = field(default_factory=dict)
     </spec>
+
+- name: Store#gloas
+  sources: []
+  spec: |
+    <spec dataclass="Store" fork="gloas" hash="4dbfec46">
+    class Store(object):
+        time: uint64
+        genesis_time: uint64
+        justified_checkpoint: Checkpoint
+        finalized_checkpoint: Checkpoint
+        unrealized_justified_checkpoint: Checkpoint
+        unrealized_finalized_checkpoint: Checkpoint
+        proposer_boost_root: Root
+        equivocating_indices: Set[ValidatorIndex]
+        blocks: Dict[Root, BeaconBlock] = field(default_factory=dict)
+        block_states: Dict[Root, BeaconState] = field(default_factory=dict)
+        block_timeliness: Dict[Root, Vector[boolean, NUM_BLOCK_TIMELINESS_DEADLINES]] = field(
+            default_factory=dict
+        )
+        checkpoint_states: Dict[Checkpoint, BeaconState] = field(default_factory=dict)
+        latest_messages: Dict[ValidatorIndex, LatestMessage] = field(default_factory=dict)
+        unrealized_justifications: Dict[Root, Checkpoint] = field(default_factory=dict)
+        # [New in Gloas:EIP7732]
+        execution_payload_states: Dict[Root, BeaconState] = field(default_factory=dict)
+        # [New in Gloas:EIP7732]
+        ptc_vote: Dict[Root, Vector[boolean, PTC_SIZE]] = field(default_factory=dict)
+    </spec>

specrefs/presets.yml

@@ -1,4 +1,4 @@
-- name: BASE_REWARD_FACTOR
+- name: BASE_REWARD_FACTOR#phase0
   sources:
     - file: config/params/config.go
       search: BaseRewardFactor\s+.*yaml:"BASE_REWARD_FACTOR"
@@ -8,7 +8,21 @@
     BASE_REWARD_FACTOR: uint64 = 64
     </spec>
 
-- name: BYTES_PER_LOGS_BLOOM
+- name: BUILDER_PENDING_WITHDRAWALS_LIMIT#gloas
+  sources: []
+  spec: |
+    <spec preset_var="BUILDER_PENDING_WITHDRAWALS_LIMIT" fork="gloas" hash="40b31377">
+    BUILDER_PENDING_WITHDRAWALS_LIMIT: uint64 = 1048576
+    </spec>
+
+- name: BUILDER_REGISTRY_LIMIT#gloas
+  sources: []
+  spec: |
+    <spec preset_var="BUILDER_REGISTRY_LIMIT" fork="gloas" hash="e951ff73">
+    BUILDER_REGISTRY_LIMIT: uint64 = 1099511627776
+    </spec>
+
+- name: BYTES_PER_LOGS_BLOOM#bellatrix
   sources:
     - file: config/params/config.go
       search: BytesPerLogsBloom\s+.*yaml:"BYTES_PER_LOGS_BLOOM"
@@ -18,7 +32,7 @@
     BYTES_PER_LOGS_BLOOM: uint64 = 256
     </spec>
 
-- name: CELLS_PER_EXT_BLOB
+- name: CELLS_PER_EXT_BLOB#fulu
   sources:
     - file: beacon-chain/rpc/eth/config/handlers.go
       search: data\["CELLS_PER_EXT_BLOB"\]
@@ -28,7 +42,7 @@
     CELLS_PER_EXT_BLOB = 128
     </spec>
 
-- name: EFFECTIVE_BALANCE_INCREMENT
+- name: EFFECTIVE_BALANCE_INCREMENT#phase0
   sources:
     - file: config/params/config.go
       search: EffectiveBalanceIncrement\s+.*yaml:"EFFECTIVE_BALANCE_INCREMENT"
@@ -38,7 +52,7 @@
     EFFECTIVE_BALANCE_INCREMENT: Gwei = 1000000000
     </spec>
 
-- name: EPOCHS_PER_ETH1_VOTING_PERIOD
+- name: EPOCHS_PER_ETH1_VOTING_PERIOD#phase0
   sources:
     - file: config/params/config.go
       search: EpochsPerEth1VotingPeriod\s+.*yaml:"EPOCHS_PER_ETH1_VOTING_PERIOD"
@@ -48,7 +62,7 @@
     EPOCHS_PER_ETH1_VOTING_PERIOD: uint64 = 64
     </spec>
 
-- name: EPOCHS_PER_HISTORICAL_VECTOR
+- name: EPOCHS_PER_HISTORICAL_VECTOR#phase0
   sources:
     - file: config/fieldparams/mainnet.go
       search: RandaoMixesLength\s*=
@@ -58,7 +72,7 @@
     EPOCHS_PER_HISTORICAL_VECTOR: uint64 = 65536
     </spec>
 
-- name: EPOCHS_PER_SLASHINGS_VECTOR
+- name: EPOCHS_PER_SLASHINGS_VECTOR#phase0
   sources:
     - file: config/fieldparams/mainnet.go
       search: SlashingsLength\s*=
@@ -68,7 +82,7 @@
     EPOCHS_PER_SLASHINGS_VECTOR: uint64 = 8192
     </spec>
 
-- name: EPOCHS_PER_SYNC_COMMITTEE_PERIOD
+- name: EPOCHS_PER_SYNC_COMMITTEE_PERIOD#altair
   sources:
     - file: config/params/config.go
       search: EpochsPerSyncCommitteePeriod\s+.*yaml:"EPOCHS_PER_SYNC_COMMITTEE_PERIOD"
@@ -78,7 +92,7 @@
     EPOCHS_PER_SYNC_COMMITTEE_PERIOD: uint64 = 256
     </spec>
 
-- name: FIELD_ELEMENTS_PER_BLOB
+- name: FIELD_ELEMENTS_PER_BLOB#deneb
   sources:
     - file: config/params/config.go
       search: FieldElementsPerBlob\s+.*yaml:"FIELD_ELEMENTS_PER_BLOB"
@@ -88,7 +102,7 @@
     FIELD_ELEMENTS_PER_BLOB: uint64 = 4096
     </spec>
 
-- name: FIELD_ELEMENTS_PER_CELL
+- name: FIELD_ELEMENTS_PER_CELL#fulu
   sources:
     - file: config/fieldparams/mainnet.go
       search: CellsPerBlob\s*=
@@ -98,7 +112,7 @@
     FIELD_ELEMENTS_PER_CELL: uint64 = 64
     </spec>
 
-- name: FIELD_ELEMENTS_PER_EXT_BLOB
+- name: FIELD_ELEMENTS_PER_EXT_BLOB#fulu
   sources:
     - file: proto/ssz_proto_library.bzl
       search: mainnet\s*=\s*\{[^}]*"field_elements_per_ext_blob\.size".*[^}]*\}
@@ -108,7 +122,7 @@
     FIELD_ELEMENTS_PER_EXT_BLOB = 8192
     </spec>
 
-- name: HISTORICAL_ROOTS_LIMIT
+- name: HISTORICAL_ROOTS_LIMIT#phase0
   sources:
     - file: config/fieldparams/mainnet.go
       search: HistoricalRootsLength\s*=
@@ -118,7 +132,7 @@
     HISTORICAL_ROOTS_LIMIT: uint64 = 16777216
     </spec>
 
-- name: HYSTERESIS_DOWNWARD_MULTIPLIER
+- name: HYSTERESIS_DOWNWARD_MULTIPLIER#phase0
   sources:
     - file: config/params/config.go
       search: HysteresisDownwardMultiplier\s+.*yaml:"HYSTERESIS_DOWNWARD_MULTIPLIER"
@@ -128,7 +142,7 @@
     HYSTERESIS_DOWNWARD_MULTIPLIER: uint64 = 1
     </spec>
 
-- name: HYSTERESIS_QUOTIENT
+- name: HYSTERESIS_QUOTIENT#phase0
   sources:
     - file: config/params/config.go
       search: HysteresisQuotient\s+.*yaml:"HYSTERESIS_QUOTIENT"
@@ -138,7 +152,7 @@
     HYSTERESIS_QUOTIENT: uint64 = 4
     </spec>
 
-- name: HYSTERESIS_UPWARD_MULTIPLIER
+- name: HYSTERESIS_UPWARD_MULTIPLIER#phase0
   sources:
     - file: config/params/config.go
       search: HysteresisUpwardMultiplier\s+.*yaml:"HYSTERESIS_UPWARD_MULTIPLIER"
@@ -148,7 +162,7 @@
     HYSTERESIS_UPWARD_MULTIPLIER: uint64 = 5
     </spec>
 
-- name: INACTIVITY_PENALTY_QUOTIENT
+- name: INACTIVITY_PENALTY_QUOTIENT#phase0
   sources:
     - file: config/params/config.go
       search: InactivityPenaltyQuotient\s+.*yaml:"INACTIVITY_PENALTY_QUOTIENT"
@@ -158,7 +172,7 @@
     INACTIVITY_PENALTY_QUOTIENT: uint64 = 67108864
     </spec>
 
-- name: INACTIVITY_PENALTY_QUOTIENT_ALTAIR
+- name: INACTIVITY_PENALTY_QUOTIENT_ALTAIR#altair
   sources:
     - file: config/params/config.go
       search: InactivityPenaltyQuotientAltair\s+.*yaml:"INACTIVITY_PENALTY_QUOTIENT_ALTAIR"
@@ -168,7 +182,7 @@
     INACTIVITY_PENALTY_QUOTIENT_ALTAIR: uint64 = 50331648
     </spec>
 
-- name: INACTIVITY_PENALTY_QUOTIENT_BELLATRIX
+- name: INACTIVITY_PENALTY_QUOTIENT_BELLATRIX#bellatrix
   sources:
     - file: config/params/config.go
       search: InactivityPenaltyQuotientBellatrix\s+.*yaml:"INACTIVITY_PENALTY_QUOTIENT_BELLATRIX"
@@ -178,7 +192,7 @@
     INACTIVITY_PENALTY_QUOTIENT_BELLATRIX: uint64 = 16777216
     </spec>
 
-- name: KZG_COMMITMENTS_INCLUSION_PROOF_DEPTH
+- name: KZG_COMMITMENTS_INCLUSION_PROOF_DEPTH#fulu
   sources:
     - file: proto/ssz_proto_library.bzl
       search: mainnet\s*=\s*\{[^}]*"kzg_commitments_inclusion_proof_depth\.size":.*[^}]*\}
@@ -188,7 +202,7 @@
     KZG_COMMITMENTS_INCLUSION_PROOF_DEPTH: uint64 = 4
     </spec>
 
-- name: KZG_COMMITMENT_INCLUSION_PROOF_DEPTH
+- name: KZG_COMMITMENT_INCLUSION_PROOF_DEPTH#deneb
   sources:
     - file: config/fieldparams/mainnet.go
       search: KzgCommitmentInclusionProofDepth\s*=
@@ -198,7 +212,7 @@
     KZG_COMMITMENT_INCLUSION_PROOF_DEPTH: uint64 = 17
     </spec>
 
-- name: MAX_ATTESTATIONS
+- name: MAX_ATTESTATIONS#phase0
   sources:
     - file: config/params/config.go
       search: MaxAttestations\s+.*yaml:"MAX_ATTESTATIONS"
@@ -208,7 +222,7 @@
     MAX_ATTESTATIONS = 128
     </spec>
 
-- name: MAX_ATTESTATIONS_ELECTRA
+- name: MAX_ATTESTATIONS_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: MaxAttestationsElectra\s+.*yaml:"MAX_ATTESTATIONS_ELECTRA"
@@ -218,7 +232,7 @@
     MAX_ATTESTATIONS_ELECTRA = 8
     </spec>
 
-- name: MAX_ATTESTER_SLASHINGS
+- name: MAX_ATTESTER_SLASHINGS#phase0
   sources:
     - file: config/params/config.go
       search: MaxAttesterSlashings\s+.*yaml:"MAX_ATTESTER_SLASHINGS"
@@ -228,7 +242,7 @@
     MAX_ATTESTER_SLASHINGS = 2
     </spec>
 
-- name: MAX_ATTESTER_SLASHINGS_ELECTRA
+- name: MAX_ATTESTER_SLASHINGS_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: MaxAttesterSlashingsElectra\s+.*yaml:"MAX_ATTESTER_SLASHINGS_ELECTRA"
@@ -238,7 +252,7 @@
     MAX_ATTESTER_SLASHINGS_ELECTRA = 1
     </spec>
 
-- name: MAX_BLOB_COMMITMENTS_PER_BLOCK
+- name: MAX_BLOB_COMMITMENTS_PER_BLOCK#deneb
   sources:
     - file: config/fieldparams/mainnet.go
       search: MaxBlobCommitmentsPerBlock\s*=
@@ -248,7 +262,7 @@
     MAX_BLOB_COMMITMENTS_PER_BLOCK: uint64 = 4096
     </spec>
 
-- name: MAX_BLS_TO_EXECUTION_CHANGES
+- name: MAX_BLS_TO_EXECUTION_CHANGES#capella
   sources:
     - file: config/params/config.go
       search: MaxBlsToExecutionChanges\s+.*yaml:"MAX_BLS_TO_EXECUTION_CHANGES"
@@ -258,7 +272,14 @@
     MAX_BLS_TO_EXECUTION_CHANGES = 16
     </spec>
 
-- name: MAX_BYTES_PER_TRANSACTION
+- name: MAX_BUILDERS_PER_WITHDRAWALS_SWEEP#gloas
+  sources: []
+  spec: |
+    <spec preset_var="MAX_BUILDERS_PER_WITHDRAWALS_SWEEP" fork="gloas" hash="1556b314">
+    MAX_BUILDERS_PER_WITHDRAWALS_SWEEP = 16384
+    </spec>
+
+- name: MAX_BYTES_PER_TRANSACTION#bellatrix
   sources:
     - file: config/params/config.go
       search: MaxBytesPerTransaction\s+.*yaml:"MAX_BYTES_PER_TRANSACTION"
@@ -288,7 +309,7 @@
     MAX_COMMITTEES_PER_SLOT: uint64 = 64
     </spec>
 
-- name: MAX_CONSOLIDATION_REQUESTS_PER_PAYLOAD
+- name: MAX_CONSOLIDATION_REQUESTS_PER_PAYLOAD#electra
   sources:
     - file: config/params/config.go
       search: MaxConsolidationsRequestsPerPayload\s+.*yaml:"MAX_CONSOLIDATION_REQUESTS_PER_PAYLOAD"
@@ -298,7 +319,7 @@
     MAX_CONSOLIDATION_REQUESTS_PER_PAYLOAD: uint64 = 2
     </spec>
 
-- name: MAX_DEPOSITS
+- name: MAX_DEPOSITS#phase0
   sources:
     - file: config/params/config.go
       search: MaxDeposits\s+.*yaml:"MAX_DEPOSITS"
@@ -308,7 +329,7 @@
     MAX_DEPOSITS = 16
     </spec>
 
-- name: MAX_DEPOSIT_REQUESTS_PER_PAYLOAD
+- name: MAX_DEPOSIT_REQUESTS_PER_PAYLOAD#electra
   sources:
     - file: config/params/config.go
       search: MaxDepositRequestsPerPayload\s+.*yaml:"MAX_DEPOSIT_REQUESTS_PER_PAYLOAD"
@@ -318,7 +339,7 @@
     MAX_DEPOSIT_REQUESTS_PER_PAYLOAD: uint64 = 8192
     </spec>
 
-- name: MAX_EFFECTIVE_BALANCE
+- name: MAX_EFFECTIVE_BALANCE#phase0
   sources:
     - file: config/params/config.go
       search: MaxEffectiveBalance\s+.*yaml:"MAX_EFFECTIVE_BALANCE"
@@ -328,7 +349,7 @@
     MAX_EFFECTIVE_BALANCE: Gwei = 32000000000
     </spec>
 
-- name: MAX_EFFECTIVE_BALANCE_ELECTRA
+- name: MAX_EFFECTIVE_BALANCE_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: MaxEffectiveBalanceElectra\s+.*yaml:"MAX_EFFECTIVE_BALANCE_ELECTRA"
@@ -338,7 +359,7 @@
     MAX_EFFECTIVE_BALANCE_ELECTRA: Gwei = 2048000000000
     </spec>
 
-- name: MAX_EXTRA_DATA_BYTES
+- name: MAX_EXTRA_DATA_BYTES#bellatrix
   sources:
     - file: config/params/config.go
       search: MaxExtraDataBytes\s+.*yaml:"MAX_EXTRA_DATA_BYTES"
@@ -348,7 +369,14 @@
     MAX_EXTRA_DATA_BYTES = 32
     </spec>
 
-- name: MAX_PENDING_DEPOSITS_PER_EPOCH
+- name: MAX_PAYLOAD_ATTESTATIONS#gloas
+  sources: []
+  spec: |
+    <spec preset_var="MAX_PAYLOAD_ATTESTATIONS" fork="gloas" hash="fc24e7ea">
+    MAX_PAYLOAD_ATTESTATIONS = 4
+    </spec>
+
+- name: MAX_PENDING_DEPOSITS_PER_EPOCH#electra
   sources:
     - file: config/params/config.go
       search: MaxPendingDepositsPerEpoch\s+.*yaml:"MAX_PENDING_DEPOSITS_PER_EPOCH"
@@ -358,7 +386,7 @@
     MAX_PENDING_DEPOSITS_PER_EPOCH: uint64 = 16
     </spec>
 
-- name: MAX_PENDING_PARTIALS_PER_WITHDRAWALS_SWEEP
+- name: MAX_PENDING_PARTIALS_PER_WITHDRAWALS_SWEEP#electra
   sources:
     - file: config/params/config.go
       search: MaxPendingPartialsPerWithdrawalsSweep\s+.*yaml:"MAX_PENDING_PARTIALS_PER_WITHDRAWALS_SWEEP"
@@ -368,7 +396,7 @@
     MAX_PENDING_PARTIALS_PER_WITHDRAWALS_SWEEP: uint64 = 8
     </spec>
 
-- name: MAX_PROPOSER_SLASHINGS
+- name: MAX_PROPOSER_SLASHINGS#phase0
   sources:
     - file: config/params/config.go
       search: MaxProposerSlashings\s+.*yaml:"MAX_PROPOSER_SLASHINGS"
@@ -378,7 +406,7 @@
     MAX_PROPOSER_SLASHINGS = 16
     </spec>
 
-- name: MAX_SEED_LOOKAHEAD
+- name: MAX_SEED_LOOKAHEAD#phase0
   sources:
     - file: config/params/config.go
       search: MaxSeedLookahead\s+.*yaml:"MAX_SEED_LOOKAHEAD"
@@ -388,7 +416,7 @@
     MAX_SEED_LOOKAHEAD: uint64 = 4
     </spec>
 
-- name: MAX_TRANSACTIONS_PER_PAYLOAD
+- name: MAX_TRANSACTIONS_PER_PAYLOAD#bellatrix
   sources:
     - file: config/params/config.go
       search: MaxTransactionsPerPayload\s+.*yaml:"MAX_TRANSACTIONS_PER_PAYLOAD"
@@ -418,7 +446,7 @@
     MAX_VALIDATORS_PER_COMMITTEE: uint64 = 2048
     </spec>
 
-- name: MAX_VALIDATORS_PER_WITHDRAWALS_SWEEP
+- name: MAX_VALIDATORS_PER_WITHDRAWALS_SWEEP#capella
   sources:
     - file: config/params/config.go
       search: MaxValidatorsPerWithdrawalsSweep\s+.*yaml:"MAX_VALIDATORS_PER_WITHDRAWALS_SWEEP"
@@ -428,7 +456,7 @@
     MAX_VALIDATORS_PER_WITHDRAWALS_SWEEP = 16384
     </spec>
 
-- name: MAX_VOLUNTARY_EXITS
+- name: MAX_VOLUNTARY_EXITS#phase0
   sources:
     - file: config/params/config.go
       search: MaxVoluntaryExits\s+.*yaml:"MAX_VOLUNTARY_EXITS"
@@ -438,7 +466,7 @@
     MAX_VOLUNTARY_EXITS = 16
     </spec>
 
-- name: MAX_WITHDRAWALS_PER_PAYLOAD
+- name: MAX_WITHDRAWALS_PER_PAYLOAD#capella
   sources:
     - file: config/fieldparams/mainnet.go
       search: MaxWithdrawalsPerPayload\s*=
@@ -448,7 +476,7 @@
     MAX_WITHDRAWALS_PER_PAYLOAD: uint64 = 16
     </spec>
 
-- name: MAX_WITHDRAWAL_REQUESTS_PER_PAYLOAD
+- name: MAX_WITHDRAWAL_REQUESTS_PER_PAYLOAD#electra
   sources:
     - file: config/params/config.go
       search: MaxWithdrawalRequestsPerPayload\s+.*yaml:"MAX_WITHDRAWAL_REQUESTS_PER_PAYLOAD"
@@ -458,7 +486,7 @@
     MAX_WITHDRAWAL_REQUESTS_PER_PAYLOAD: uint64 = 16
     </spec>
 
-- name: MIN_ACTIVATION_BALANCE
+- name: MIN_ACTIVATION_BALANCE#electra
   sources:
     - file: config/params/config.go
       search: MinActivationBalance\s+.*yaml:"MIN_ACTIVATION_BALANCE"
@@ -468,7 +496,7 @@
     MIN_ACTIVATION_BALANCE: Gwei = 32000000000
     </spec>
 
-- name: MIN_ATTESTATION_INCLUSION_DELAY
+- name: MIN_ATTESTATION_INCLUSION_DELAY#phase0
   sources:
     - file: config/params/config.go
       search: MinAttestationInclusionDelay\s+.*yaml:"MIN_ATTESTATION_INCLUSION_DELAY"
@@ -478,7 +506,7 @@
     MIN_ATTESTATION_INCLUSION_DELAY: uint64 = 1
     </spec>
 
-- name: MIN_DEPOSIT_AMOUNT
+- name: MIN_DEPOSIT_AMOUNT#phase0
   sources:
     - file: config/params/config.go
       search: MinDepositAmount\s+.*yaml:"MIN_DEPOSIT_AMOUNT"
@@ -488,7 +516,7 @@
     MIN_DEPOSIT_AMOUNT: Gwei = 1000000000
     </spec>
 
-- name: MIN_EPOCHS_TO_INACTIVITY_PENALTY
+- name: MIN_EPOCHS_TO_INACTIVITY_PENALTY#phase0
   sources:
     - file: config/params/config.go
       search: MinEpochsToInactivityPenalty\s+.*yaml:"MIN_EPOCHS_TO_INACTIVITY_PENALTY"
@@ -498,7 +526,7 @@
     MIN_EPOCHS_TO_INACTIVITY_PENALTY: uint64 = 4
     </spec>
 
-- name: MIN_SEED_LOOKAHEAD
+- name: MIN_SEED_LOOKAHEAD#phase0
   sources:
     - file: config/params/config.go
       search: MinSeedLookahead\s+.*yaml:"MIN_SEED_LOOKAHEAD"
@@ -508,7 +536,7 @@
     MIN_SEED_LOOKAHEAD: uint64 = 1
     </spec>
 
-- name: MIN_SLASHING_PENALTY_QUOTIENT
+- name: MIN_SLASHING_PENALTY_QUOTIENT#phase0
   sources:
     - file: config/params/config.go
       search: MinSlashingPenaltyQuotient\s+.*yaml:"MIN_SLASHING_PENALTY_QUOTIENT"
@@ -518,7 +546,7 @@
     MIN_SLASHING_PENALTY_QUOTIENT: uint64 = 128
     </spec>
 
-- name: MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR
+- name: MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR#altair
   sources:
     - file: config/params/config.go
       search: MinSlashingPenaltyQuotientAltair\s+.*yaml:"MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR"
@@ -528,7 +556,7 @@
     MIN_SLASHING_PENALTY_QUOTIENT_ALTAIR: uint64 = 64
     </spec>
 
-- name: MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX
+- name: MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX#bellatrix
   sources:
     - file: config/params/config.go
       search: MinSlashingPenaltyQuotientBellatrix\s+.*yaml:"MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX"
@@ -538,7 +566,7 @@
     MIN_SLASHING_PENALTY_QUOTIENT_BELLATRIX: uint64 = 32
     </spec>
 
-- name: MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA
+- name: MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: MinSlashingPenaltyQuotientElectra\s+.*yaml:"MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA"
@@ -548,7 +576,7 @@
     MIN_SLASHING_PENALTY_QUOTIENT_ELECTRA: uint64 = 4096
     </spec>
 
-- name: MIN_SYNC_COMMITTEE_PARTICIPANTS
+- name: MIN_SYNC_COMMITTEE_PARTICIPANTS#altair
   sources:
     - file: config/params/config.go
       search: MinSyncCommitteeParticipants\s+.*yaml:"MIN_SYNC_COMMITTEE_PARTICIPANTS"
@@ -558,7 +586,7 @@
     MIN_SYNC_COMMITTEE_PARTICIPANTS = 1
     </spec>
 
-- name: NUMBER_OF_COLUMNS
+- name: NUMBER_OF_COLUMNS#fulu
   sources:
     - file: config/fieldparams/mainnet.go
       search: NumberOfColumns\s*=
@@ -568,7 +596,7 @@
     NUMBER_OF_COLUMNS: uint64 = 128
     </spec>
 
-- name: PENDING_CONSOLIDATIONS_LIMIT
+- name: PENDING_CONSOLIDATIONS_LIMIT#electra
   sources:
     - file: config/fieldparams/mainnet.go
       search: PendingConsolidationsLimit\s*=
@@ -578,7 +606,7 @@
     PENDING_CONSOLIDATIONS_LIMIT: uint64 = 262144
     </spec>
 
-- name: PENDING_DEPOSITS_LIMIT
+- name: PENDING_DEPOSITS_LIMIT#electra
   sources:
     - file: config/fieldparams/mainnet.go
       search: PendingDepositsLimit\s*=
@@ -588,7 +616,7 @@
     PENDING_DEPOSITS_LIMIT: uint64 = 134217728
     </spec>
 
-- name: PENDING_PARTIAL_WITHDRAWALS_LIMIT
+- name: PENDING_PARTIAL_WITHDRAWALS_LIMIT#electra
   sources:
     - file: config/fieldparams/mainnet.go
       search: PendingPartialWithdrawalsLimit\s*=
@@ -598,7 +626,7 @@
     PENDING_PARTIAL_WITHDRAWALS_LIMIT: uint64 = 134217728
     </spec>
 
-- name: PROPORTIONAL_SLASHING_MULTIPLIER
+- name: PROPORTIONAL_SLASHING_MULTIPLIER#phase0
   sources:
     - file: config/params/config.go
       search: ProportionalSlashingMultiplier\s+.*yaml:"PROPORTIONAL_SLASHING_MULTIPLIER"
@@ -608,7 +636,7 @@
     PROPORTIONAL_SLASHING_MULTIPLIER: uint64 = 1
     </spec>
 
-- name: PROPORTIONAL_SLASHING_MULTIPLIER_ALTAIR
+- name: PROPORTIONAL_SLASHING_MULTIPLIER_ALTAIR#altair
   sources:
     - file: config/params/config.go
       search: ProportionalSlashingMultiplierAltair\s+.*yaml:"PROPORTIONAL_SLASHING_MULTIPLIER_ALTAIR"
@@ -618,7 +646,7 @@
     PROPORTIONAL_SLASHING_MULTIPLIER_ALTAIR: uint64 = 2
     </spec>
 
-- name: PROPORTIONAL_SLASHING_MULTIPLIER_BELLATRIX
+- name: PROPORTIONAL_SLASHING_MULTIPLIER_BELLATRIX#bellatrix
   sources:
     - file: config/params/config.go
       search: ProportionalSlashingMultiplierBellatrix\s+.*yaml:"PROPORTIONAL_SLASHING_MULTIPLIER_BELLATRIX"
@@ -628,7 +656,7 @@
     PROPORTIONAL_SLASHING_MULTIPLIER_BELLATRIX: uint64 = 3
     </spec>
 
-- name: PROPOSER_REWARD_QUOTIENT
+- name: PROPOSER_REWARD_QUOTIENT#phase0
   sources:
     - file: config/params/config.go
       search: ProposerRewardQuotient\s+.*yaml:"PROPOSER_REWARD_QUOTIENT"
@@ -638,7 +666,14 @@
     PROPOSER_REWARD_QUOTIENT: uint64 = 8
     </spec>
 
-- name: SHUFFLE_ROUND_COUNT
+- name: PTC_SIZE#gloas
+  sources: []
+  spec: |
+    <spec preset_var="PTC_SIZE" fork="gloas" hash="d61c5930">
+    PTC_SIZE: uint64 = 512
+    </spec>
+
+- name: SHUFFLE_ROUND_COUNT#phase0
   sources:
     - file: config/params/config.go
       search: ShuffleRoundCount\s+.*yaml:"SHUFFLE_ROUND_COUNT"
@@ -648,7 +683,7 @@
     SHUFFLE_ROUND_COUNT: uint64 = 90
     </spec>
 
-- name: SLOTS_PER_EPOCH
+- name: SLOTS_PER_EPOCH#phase0
   sources:
     - file: config/fieldparams/mainnet.go
       search: SlotsPerEpoch\s*=
@@ -658,7 +693,7 @@
     SLOTS_PER_EPOCH: uint64 = 32
     </spec>
 
-- name: SLOTS_PER_HISTORICAL_ROOT
+- name: SLOTS_PER_HISTORICAL_ROOT#phase0
   sources:
     - file: config/fieldparams/mainnet.go
       search: BlockRootsLength\s*=
@@ -668,7 +703,7 @@
     SLOTS_PER_HISTORICAL_ROOT: uint64 = 8192
     </spec>
 
-- name: SYNC_COMMITTEE_SIZE
+- name: SYNC_COMMITTEE_SIZE#altair
   sources:
     - file: config/fieldparams/mainnet.go
       search: SyncCommitteeLength\s*=
@@ -678,7 +713,7 @@
     SYNC_COMMITTEE_SIZE: uint64 = 512
     </spec>
 
-- name: TARGET_COMMITTEE_SIZE
+- name: TARGET_COMMITTEE_SIZE#phase0
   sources:
     - file: config/params/config.go
       search: TargetCommitteeSize\s+.*yaml:"TARGET_COMMITTEE_SIZE"
@@ -688,7 +723,7 @@
     TARGET_COMMITTEE_SIZE: uint64 = 128
     </spec>
 
-- name: UPDATE_TIMEOUT
+- name: UPDATE_TIMEOUT#altair
   sources:
     - file: beacon-chain/rpc/eth/config/handlers.go
       search: data\["UPDATE_TIMEOUT"\]
@@ -698,7 +733,7 @@
     UPDATE_TIMEOUT = 8192
     </spec>
 
-- name: VALIDATOR_REGISTRY_LIMIT
+- name: VALIDATOR_REGISTRY_LIMIT#phase0
   sources:
     - file: config/fieldparams/mainnet.go
       search: ValidatorRegistryLimit\s*=
@@ -708,7 +743,7 @@
     VALIDATOR_REGISTRY_LIMIT: uint64 = 1099511627776
     </spec>
 
-- name: WHISTLEBLOWER_REWARD_QUOTIENT
+- name: WHISTLEBLOWER_REWARD_QUOTIENT#phase0
   sources:
     - file: config/params/config.go
       search: WhistleBlowerRewardQuotient\s+.*yaml:"WHISTLEBLOWER_REWARD_QUOTIENT"
@@ -718,7 +753,7 @@
     WHISTLEBLOWER_REWARD_QUOTIENT: uint64 = 512
     </spec>
 
-- name: WHISTLEBLOWER_REWARD_QUOTIENT_ELECTRA
+- name: WHISTLEBLOWER_REWARD_QUOTIENT_ELECTRA#electra
   sources:
     - file: config/params/config.go
       search: WhistleBlowerRewardQuotientElectra\s+.*yaml:"WHISTLEBLOWER_REWARD_QUOTIENT_ELECTRA"

testing/validator-mock/validator_client_mock.go

@@ -283,16 +283,18 @@ func (mr *MockValidatorClientMockRecorder) ProposeExit(ctx, in any) *gomock.Call
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "ProposeExit", reflect.TypeOf((*MockValidatorClient)(nil).ProposeExit), ctx, in)
 }
 
-// SwitchHost mocks base method.
-func (m *MockValidatorClient) SwitchHost(host string) {
+// EnsureReady mocks base method.
+func (m *MockValidatorClient) EnsureReady(ctx context.Context) bool {
 	m.ctrl.T.Helper()
-	m.ctrl.Call(m, "SwitchHost", host)
+	ret := m.ctrl.Call(m, "EnsureReady", ctx)
+	ret0, _ := ret[0].(bool)
+	return ret0
 }
 
-// SwitchHost indicates an expected call of SwitchHost.
-func (mr *MockValidatorClientMockRecorder) SwitchHost(host any) *gomock.Call {
+// EnsureReady indicates an expected call of EnsureReady.
+func (mr *MockValidatorClientMockRecorder) EnsureReady(ctx any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SwitchHost", reflect.TypeOf((*MockValidatorClient)(nil).SwitchHost), host)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "EnsureReady", reflect.TypeOf((*MockValidatorClient)(nil).EnsureReady), ctx)
 }
 
 // StartEventStream mocks base method.

testing/validator-mock/validator_mock.go

@@ -128,18 +128,18 @@ func (mr *MockValidatorMockRecorder) EventsChan() *gomock.Call {
 	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "EventsChan", reflect.TypeOf((*MockValidator)(nil).EventsChan))
 }
 
-// FindHealthyHost mocks base method.
-func (m *MockValidator) FindHealthyHost(arg0 context.Context) bool {
+// EnsureReady mocks base method.
+func (m *MockValidator) EnsureReady(arg0 context.Context) bool {
 	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "FindHealthyHost", arg0)
+	ret := m.ctrl.Call(m, "EnsureReady", arg0)
 	ret0, _ := ret[0].(bool)
 	return ret0
 }
 
-// FindHealthyHost indicates an expected call of FindHealthyHost.
-func (mr *MockValidatorMockRecorder) FindHealthyHost(arg0 any) *gomock.Call {
+// EnsureReady indicates an expected call of EnsureReady.
+func (mr *MockValidatorMockRecorder) EnsureReady(arg0 any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "FindHealthyHost", reflect.TypeOf((*MockValidator)(nil).FindHealthyHost), arg0)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "EnsureReady", reflect.TypeOf((*MockValidator)(nil).EnsureReady), arg0)
 }
 
 // GenesisTime mocks base method.

validator/client/BUILD.bazel

@@ -122,7 +122,6 @@ go_test(
     embed = [":go_default_library"],
     deps = [
         "//api/grpc:go_default_library",
-        "//api/rest:go_default_library",
         "//api/server/structs:go_default_library",
         "//async/event:go_default_library",
         "//beacon-chain/core/signing:go_default_library",

validator/client/beacon-api/BUILD.bazel

@@ -42,6 +42,7 @@ go_library(
         "//api:go_default_library",
         "//api/apiutil:go_default_library",
         "//api/client/event:go_default_library",
+        "//api/fallback:go_default_library",
         "//api/rest:go_default_library",
         "//api/server/structs:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
@@ -51,6 +52,7 @@ go_library(
         "//consensus-types/primitives:go_default_library",
         "//consensus-types/validator:go_default_library",
         "//encoding/bytesutil:go_default_library",
+        "//encoding/ssz:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
         "//network/httputil:go_default_library",
         "//proto/engine/v1:go_default_library",

validator/client/beacon-api/attestation_data.go

@@ -26,7 +26,7 @@ func (c *beaconApiValidatorClient) attestationData(
 	query := apiutil.BuildURL("/eth/v1/validator/attestation_data", params)
 	produceAttestationDataResponseJson := structs.GetAttestationDataResponse{}
 
-	if err := c.jsonRestHandler.Get(ctx, query, &produceAttestationDataResponseJson); err != nil {
+	if err := c.handler.Get(ctx, query, &produceAttestationDataResponseJson); err != nil {
 		return nil, err
 	}
 

validator/client/beacon-api/attestation_data_test.go

@@ -28,10 +28,10 @@ func TestGetAttestationData_ValidAttestation(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 	produceAttestationDataResponseJson := structs.GetAttestationDataResponse{}
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v1/validator/attestation_data?committee_index=%d&slot=%d", expectedCommitteeIndex, expectedSlot),
 		&produceAttestationDataResponseJson,
@@ -56,7 +56,7 @@ func TestGetAttestationData_ValidAttestation(t *testing.T) {
 		},
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	resp, err := validatorClient.attestationData(ctx, primitives.Slot(expectedSlot), primitives.CommitteeIndex(expectedCommitteeIndex))
 	assert.NoError(t, err)
 
@@ -180,8 +180,8 @@ func TestGetAttestationData_InvalidData(t *testing.T) {
 			defer ctrl.Finish()
 
 			produceAttestationDataResponseJson := structs.GetAttestationDataResponse{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().Get(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v1/validator/attestation_data?committee_index=2&slot=1",
 				&produceAttestationDataResponseJson,
@@ -192,7 +192,7 @@ func TestGetAttestationData_InvalidData(t *testing.T) {
 				testCase.generateData(),
 			).Times(1)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			_, err := validatorClient.attestationData(ctx, 1, 2)
 			assert.ErrorContains(t, testCase.expectedErrorMessage, err)
 		})
@@ -208,9 +208,9 @@ func TestGetAttestationData_JsonResponseError(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 	produceAttestationDataResponseJson := structs.GetAttestationDataResponse{}
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v1/validator/attestation_data?committee_index=%d&slot=%d", committeeIndex, slot),
 		&produceAttestationDataResponseJson,
@@ -218,7 +218,7 @@ func TestGetAttestationData_JsonResponseError(t *testing.T) {
 		errors.New("some specific json response error"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.attestationData(ctx, slot, committeeIndex)
 	assert.ErrorContains(t, "some specific json response error", err)
 }

validator/client/beacon-api/beacon_api_beacon_chain_client.go

@@ -18,13 +18,13 @@ import (
 
 type beaconApiChainClient struct {
 	fallbackClient          iface.ChainClient
-	jsonRestHandler         rest.RestHandler
+	handler                 rest.Handler
 	stateValidatorsProvider StateValidatorsProvider
 }
 
 func (c beaconApiChainClient) headBlockHeaders(ctx context.Context) (*structs.GetBlockHeaderResponse, error) {
 	blockHeader := structs.GetBlockHeaderResponse{}
-	err := c.jsonRestHandler.Get(ctx, "/eth/v1/beacon/headers/head", &blockHeader)
+	err := c.handler.Get(ctx, "/eth/v1/beacon/headers/head", &blockHeader)
 	if err != nil {
 		return nil, err
 	}
@@ -44,7 +44,7 @@ func (c beaconApiChainClient) ChainHead(ctx context.Context, _ *empty.Empty) (*e
 	const endpoint = "/eth/v1/beacon/states/head/finality_checkpoints"
 
 	finalityCheckpoints := structs.GetFinalityCheckpointsResponse{}
-	if err := c.jsonRestHandler.Get(ctx, endpoint, &finalityCheckpoints); err != nil {
+	if err := c.handler.Get(ctx, endpoint, &finalityCheckpoints); err != nil {
 		return nil, err
 	}
 
@@ -328,10 +328,10 @@ func (c beaconApiChainClient) ValidatorParticipation(ctx context.Context, in *et
 	return nil, errors.New("beaconApiChainClient.ValidatorParticipation is not implemented. To use a fallback client, pass a fallback client as the last argument of NewBeaconApiChainClientWithFallback.")
 }
 
-func NewBeaconApiChainClientWithFallback(jsonRestHandler rest.RestHandler, fallbackClient iface.ChainClient) iface.ChainClient {
+func NewBeaconApiChainClientWithFallback(handler rest.Handler, fallbackClient iface.ChainClient) iface.ChainClient {
 	return &beaconApiChainClient{
-		jsonRestHandler:         jsonRestHandler,
+		handler:                 handler,
 		fallbackClient:          fallbackClient,
-		stateValidatorsProvider: beaconApiStateValidatorsProvider{jsonRestHandler: jsonRestHandler},
+		stateValidatorsProvider: beaconApiStateValidatorsProvider{handler: handler},
 	}
 }

validator/client/beacon-api/beacon_api_beacon_chain_client_test.go

@@ -115,12 +115,12 @@ func TestListValidators(t *testing.T) {
 			nil,
 		)
 
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-		jsonRestHandler.EXPECT().Get(gomock.Any(), blockHeaderEndpoint, gomock.Any()).Return(errors.New("bar error"))
+		handler := mock.NewMockJsonRestHandler(ctrl)
+		handler.EXPECT().Get(gomock.Any(), blockHeaderEndpoint, gomock.Any()).Return(errors.New("bar error"))
 
 		beaconChainClient := beaconApiChainClient{
 			stateValidatorsProvider: stateValidatorsProvider,
-			jsonRestHandler:         jsonRestHandler,
+			handler:                 handler,
 		}
 		_, err := beaconChainClient.Validators(ctx, &ethpb.ListValidatorsRequest{
 			QueryFilter: nil,
@@ -188,8 +188,8 @@ func TestListValidators(t *testing.T) {
 					nil,
 				)
 
-				jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-				jsonRestHandler.EXPECT().Get(gomock.Any(), blockHeaderEndpoint, gomock.Any()).Return(
+				handler := mock.NewMockJsonRestHandler(ctrl)
+				handler.EXPECT().Get(gomock.Any(), blockHeaderEndpoint, gomock.Any()).Return(
 					nil,
 				).SetArg(
 					2,
@@ -198,7 +198,7 @@ func TestListValidators(t *testing.T) {
 
 				beaconChainClient := beaconApiChainClient{
 					stateValidatorsProvider: stateValidatorsProvider,
-					jsonRestHandler:         jsonRestHandler,
+					handler:                 handler,
 				}
 				_, err := beaconChainClient.Validators(ctx, &ethpb.ListValidatorsRequest{
 					QueryFilter: nil,
@@ -740,15 +740,15 @@ func TestGetChainHead(t *testing.T) {
 				ctx := t.Context()
 
 				finalityCheckpointsResponse := structs.GetFinalityCheckpointsResponse{}
-				jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-				jsonRestHandler.EXPECT().Get(gomock.Any(), finalityCheckpointsEndpoint, &finalityCheckpointsResponse).Return(
+				handler := mock.NewMockJsonRestHandler(ctrl)
+				handler.EXPECT().Get(gomock.Any(), finalityCheckpointsEndpoint, &finalityCheckpointsResponse).Return(
 					testCase.finalityCheckpointsError,
 				).SetArg(
 					2,
 					testCase.generateFinalityCheckpointsResponse(),
 				)
 
-				beaconChainClient := beaconApiChainClient{jsonRestHandler: jsonRestHandler}
+				beaconChainClient := beaconApiChainClient{handler: handler}
 				_, err := beaconChainClient.ChainHead(ctx, &emptypb.Empty{})
 				assert.ErrorContains(t, testCase.expectedError, err)
 			})
@@ -837,10 +837,10 @@ func TestGetChainHead(t *testing.T) {
 				defer ctrl.Finish()
 				ctx := t.Context()
 
-				jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+				handler := mock.NewMockJsonRestHandler(ctrl)
 
 				finalityCheckpointsResponse := structs.GetFinalityCheckpointsResponse{}
-				jsonRestHandler.EXPECT().Get(gomock.Any(), finalityCheckpointsEndpoint, &finalityCheckpointsResponse).Return(
+				handler.EXPECT().Get(gomock.Any(), finalityCheckpointsEndpoint, &finalityCheckpointsResponse).Return(
 					nil,
 				).SetArg(
 					2,
@@ -848,14 +848,14 @@ func TestGetChainHead(t *testing.T) {
 				)
 
 				headBlockHeadersResponse := structs.GetBlockHeaderResponse{}
-				jsonRestHandler.EXPECT().Get(gomock.Any(), headBlockHeadersEndpoint, &headBlockHeadersResponse).Return(
+				handler.EXPECT().Get(gomock.Any(), headBlockHeadersEndpoint, &headBlockHeadersResponse).Return(
 					testCase.headBlockHeadersError,
 				).SetArg(
 					2,
 					testCase.generateHeadBlockHeadersResponse(),
 				)
 
-				beaconChainClient := beaconApiChainClient{jsonRestHandler: jsonRestHandler}
+				beaconChainClient := beaconApiChainClient{handler: handler}
 				_, err := beaconChainClient.ChainHead(ctx, &emptypb.Empty{})
 				assert.ErrorContains(t, testCase.expectedError, err)
 			})
@@ -867,10 +867,10 @@ func TestGetChainHead(t *testing.T) {
 		defer ctrl.Finish()
 		ctx := t.Context()
 
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+		handler := mock.NewMockJsonRestHandler(ctrl)
 
 		finalityCheckpointsResponse := structs.GetFinalityCheckpointsResponse{}
-		jsonRestHandler.EXPECT().Get(gomock.Any(), finalityCheckpointsEndpoint, &finalityCheckpointsResponse).Return(
+		handler.EXPECT().Get(gomock.Any(), finalityCheckpointsEndpoint, &finalityCheckpointsResponse).Return(
 			nil,
 		).SetArg(
 			2,
@@ -878,7 +878,7 @@ func TestGetChainHead(t *testing.T) {
 		)
 
 		headBlockHeadersResponse := structs.GetBlockHeaderResponse{}
-		jsonRestHandler.EXPECT().Get(gomock.Any(), headBlockHeadersEndpoint, &headBlockHeadersResponse).Return(
+		handler.EXPECT().Get(gomock.Any(), headBlockHeadersEndpoint, &headBlockHeadersResponse).Return(
 			nil,
 		).SetArg(
 			2,
@@ -909,7 +909,7 @@ func TestGetChainHead(t *testing.T) {
 			HeadEpoch:                  slots.ToEpoch(8),
 		}
 
-		beaconChainClient := beaconApiChainClient{jsonRestHandler: jsonRestHandler}
+		beaconChainClient := beaconApiChainClient{handler: handler}
 		chainHead, err := beaconChainClient.ChainHead(ctx, &emptypb.Empty{})
 		require.NoError(t, err)
 		assert.DeepEqual(t, expectedChainHead, chainHead)

validator/client/beacon-api/beacon_api_helpers.go

@@ -29,7 +29,7 @@ func (c *beaconApiValidatorClient) fork(ctx context.Context) (*structs.GetStateF
 
 	stateForkResponseJson := &structs.GetStateForkResponse{}
 
-	if err := c.jsonRestHandler.Get(ctx, endpoint, stateForkResponseJson); err != nil {
+	if err := c.handler.Get(ctx, endpoint, stateForkResponseJson); err != nil {
 		return nil, err
 	}
 
@@ -41,7 +41,7 @@ func (c *beaconApiValidatorClient) headers(ctx context.Context) (*structs.GetBlo
 
 	blockHeadersResponseJson := &structs.GetBlockHeadersResponse{}
 
-	if err := c.jsonRestHandler.Get(ctx, endpoint, blockHeadersResponseJson); err != nil {
+	if err := c.handler.Get(ctx, endpoint, blockHeadersResponseJson); err != nil {
 		return nil, err
 	}
 
@@ -59,7 +59,7 @@ func (c *beaconApiValidatorClient) liveness(ctx context.Context, epoch primitive
 		return nil, errors.Wrapf(err, "failed to marshal validator indexes")
 	}
 
-	if err = c.jsonRestHandler.Post(ctx, url, nil, bytes.NewBuffer(marshalledJsonValidatorIndexes), livenessResponseJson); err != nil {
+	if err = c.handler.Post(ctx, url, nil, bytes.NewBuffer(marshalledJsonValidatorIndexes), livenessResponseJson); err != nil {
 		return nil, err
 	}
 
@@ -71,7 +71,7 @@ func (c *beaconApiValidatorClient) syncing(ctx context.Context) (*structs.SyncSt
 
 	syncingResponseJson := &structs.SyncStatusResponse{}
 
-	if err := c.jsonRestHandler.Get(ctx, endpoint, syncingResponseJson); err != nil {
+	if err := c.handler.Get(ctx, endpoint, syncingResponseJson); err != nil {
 		return nil, err
 	}
 

validator/client/beacon-api/beacon_api_helpers_test.go

@@ -20,7 +20,7 @@ func TestGetFork_Nominal(t *testing.T) {
 	defer ctrl.Finish()
 
 	stateForkResponseJson := structs.GetStateForkResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	expected := structs.GetStateForkResponse{
 		Data: &structs.Fork{
@@ -32,7 +32,7 @@ func TestGetFork_Nominal(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		forkEndpoint,
 		&stateForkResponseJson,
@@ -44,7 +44,7 @@ func TestGetFork_Nominal(t *testing.T) {
 	).Times(1)
 
 	validatorClient := beaconApiValidatorClient{
-		jsonRestHandler: jsonRestHandler,
+		handler: handler,
 	}
 
 	fork, err := validatorClient.fork(ctx)
@@ -56,11 +56,11 @@ func TestGetFork_Invalid(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	ctx := t.Context()
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		forkEndpoint,
 		gomock.Any(),
@@ -69,7 +69,7 @@ func TestGetFork_Invalid(t *testing.T) {
 	).Times(1)
 
 	validatorClient := beaconApiValidatorClient{
-		jsonRestHandler: jsonRestHandler,
+		handler: handler,
 	}
 
 	_, err := validatorClient.fork(ctx)
@@ -83,7 +83,7 @@ func TestGetHeaders_Nominal(t *testing.T) {
 	defer ctrl.Finish()
 
 	blockHeadersResponseJson := structs.GetBlockHeadersResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	expected := structs.GetBlockHeadersResponse{
 		Data: []*structs.SignedBeaconBlockHeaderContainer{
@@ -99,7 +99,7 @@ func TestGetHeaders_Nominal(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		headersEndpoint,
 		&blockHeadersResponseJson,
@@ -111,7 +111,7 @@ func TestGetHeaders_Nominal(t *testing.T) {
 	).Times(1)
 
 	validatorClient := beaconApiValidatorClient{
-		jsonRestHandler: jsonRestHandler,
+		handler: handler,
 	}
 
 	headers, err := validatorClient.headers(ctx)
@@ -123,11 +123,11 @@ func TestGetHeaders_Invalid(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	ctx := t.Context()
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		headersEndpoint,
 		gomock.Any(),
@@ -136,7 +136,7 @@ func TestGetHeaders_Invalid(t *testing.T) {
 	).Times(1)
 
 	validatorClient := beaconApiValidatorClient{
-		jsonRestHandler: jsonRestHandler,
+		handler: handler,
 	}
 
 	_, err := validatorClient.headers(ctx)
@@ -170,8 +170,8 @@ func TestGetLiveness_Nominal(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		livenessEndpoint,
 		nil,
@@ -184,7 +184,7 @@ func TestGetLiveness_Nominal(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	liveness, err := validatorClient.liveness(ctx, 42, indexes)
 
 	require.NoError(t, err)
@@ -197,8 +197,8 @@ func TestGetLiveness_Invalid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		livenessEndpoint,
 		nil,
@@ -208,7 +208,7 @@ func TestGetLiveness_Invalid(t *testing.T) {
 		errors.New("custom error"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.liveness(ctx, 42, nil)
 
 	require.ErrorContains(t, "custom error", err)
@@ -237,7 +237,7 @@ func TestGetIsSyncing_Nominal(t *testing.T) {
 			defer ctrl.Finish()
 
 			syncingResponseJson := structs.SyncStatusResponse{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			expected := structs.SyncStatusResponse{
 				Data: &structs.SyncStatusResponseData{
@@ -247,7 +247,7 @@ func TestGetIsSyncing_Nominal(t *testing.T) {
 
 			ctx := t.Context()
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				syncingEndpoint,
 				&syncingResponseJson,
@@ -259,7 +259,7 @@ func TestGetIsSyncing_Nominal(t *testing.T) {
 			).Times(1)
 
 			validatorClient := beaconApiValidatorClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 			}
 
 			isSyncing, err := validatorClient.isSyncing(ctx)
@@ -274,11 +274,11 @@ func TestGetIsSyncing_Invalid(t *testing.T) {
 	defer ctrl.Finish()
 
 	syncingResponseJson := structs.SyncStatusResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	ctx := t.Context()
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		syncingEndpoint,
 		&syncingResponseJson,
@@ -287,7 +287,7 @@ func TestGetIsSyncing_Invalid(t *testing.T) {
 	).Times(1)
 
 	validatorClient := beaconApiValidatorClient{
-		jsonRestHandler: jsonRestHandler,
+		handler: handler,
 	}
 
 	isSyncing, err := validatorClient.isSyncing(ctx)

validator/client/beacon-api/beacon_api_node_client.go

@@ -21,13 +21,13 @@ var (
 
 type beaconApiNodeClient struct {
 	fallbackClient  iface.NodeClient
-	jsonRestHandler rest.RestHandler
+	handler         rest.Handler
 	genesisProvider GenesisProvider
 }
 
 func (c *beaconApiNodeClient) SyncStatus(ctx context.Context, _ *empty.Empty) (*ethpb.SyncStatus, error) {
 	syncingResponse := structs.SyncStatusResponse{}
-	if err := c.jsonRestHandler.Get(ctx, "/eth/v1/node/syncing", &syncingResponse); err != nil {
+	if err := c.handler.Get(ctx, "/eth/v1/node/syncing", &syncingResponse); err != nil {
 		return nil, err
 	}
 
@@ -57,7 +57,7 @@ func (c *beaconApiNodeClient) Genesis(ctx context.Context, _ *empty.Empty) (*eth
 	}
 
 	depositContractJson := structs.GetDepositContractResponse{}
-	if err = c.jsonRestHandler.Get(ctx, "/eth/v1/config/deposit_contract", &depositContractJson); err != nil {
+	if err = c.handler.Get(ctx, "/eth/v1/config/deposit_contract", &depositContractJson); err != nil {
 		return nil, err
 	}
 
@@ -81,7 +81,7 @@ func (c *beaconApiNodeClient) Genesis(ctx context.Context, _ *empty.Empty) (*eth
 
 func (c *beaconApiNodeClient) Version(ctx context.Context, _ *empty.Empty) (*ethpb.Version, error) {
 	var versionResponse structs.GetVersionResponse
-	if err := c.jsonRestHandler.Get(ctx, "/eth/v1/node/version", &versionResponse); err != nil {
+	if err := c.handler.Get(ctx, "/eth/v1/node/version", &versionResponse); err != nil {
 		return nil, err
 	}
 
@@ -106,9 +106,9 @@ func (c *beaconApiNodeClient) Peers(ctx context.Context, in *empty.Empty) (*ethp
 // IsReady returns true only if the node is fully synced (200 OK).
 // A 206 Partial Content response indicates the node is syncing and not ready.
 func (c *beaconApiNodeClient) IsReady(ctx context.Context) bool {
-	statusCode, err := c.jsonRestHandler.GetStatusCode(ctx, "/eth/v1/node/health")
+	statusCode, err := c.handler.GetStatusCode(ctx, "/eth/v1/node/health")
 	if err != nil {
-		log.WithError(err).Error("failed to get health of node")
+		log.WithError(err).WithField("url", c.handler.Host()).Error("failed to get health of node")
 		return false
 	}
 	// Only 200 OK means the node is fully synced and ready.
@@ -116,11 +116,11 @@ func (c *beaconApiNodeClient) IsReady(ctx context.Context) bool {
 	return statusCode == http.StatusOK
 }
 
-func NewNodeClientWithFallback(jsonRestHandler rest.RestHandler, fallbackClient iface.NodeClient) iface.NodeClient {
+func NewNodeClientWithFallback(handler rest.Handler, fallbackClient iface.NodeClient) iface.NodeClient {
 	b := &beaconApiNodeClient{
-		jsonRestHandler: jsonRestHandler,
+		handler:         handler,
 		fallbackClient:  fallbackClient,
-		genesisProvider: &beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler},
+		genesisProvider: &beaconApiGenesisProvider{handler: handler},
 	}
 	return b
 }

validator/client/beacon-api/beacon_api_node_client_test.go

@@ -120,10 +120,10 @@ func TestGetGenesis(t *testing.T) {
 			)
 
 			depositContractJson := structs.GetDepositContractResponse{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			if testCase.queriesDepositContract {
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					"/eth/v1/config/deposit_contract",
 					&depositContractJson,
@@ -137,7 +137,7 @@ func TestGetGenesis(t *testing.T) {
 
 			nodeClient := &beaconApiNodeClient{
 				genesisProvider: genesisProvider,
-				jsonRestHandler: jsonRestHandler,
+				handler:         handler,
 			}
 			response, err := nodeClient.Genesis(ctx, &emptypb.Empty{})
 
@@ -201,8 +201,8 @@ func TestGetSyncStatus(t *testing.T) {
 			ctx := t.Context()
 
 			syncingResponse := structs.SyncStatusResponse{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().Get(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().Get(
 				gomock.Any(),
 				syncingEndpoint,
 				&syncingResponse,
@@ -213,7 +213,7 @@ func TestGetSyncStatus(t *testing.T) {
 				testCase.restEndpointResponse,
 			)
 
-			nodeClient := &beaconApiNodeClient{jsonRestHandler: jsonRestHandler}
+			nodeClient := &beaconApiNodeClient{handler: handler}
 			syncStatus, err := nodeClient.SyncStatus(ctx, &emptypb.Empty{})
 
 			if testCase.expectedResponse == nil {
@@ -265,8 +265,8 @@ func TestGetVersion(t *testing.T) {
 			ctx := t.Context()
 
 			var versionResponse structs.GetVersionResponse
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().Get(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().Get(
 				gomock.Any(),
 				versionEndpoint,
 				&versionResponse,
@@ -277,7 +277,7 @@ func TestGetVersion(t *testing.T) {
 				testCase.restEndpointResponse,
 			)
 
-			nodeClient := &beaconApiNodeClient{jsonRestHandler: jsonRestHandler}
+			nodeClient := &beaconApiNodeClient{handler: handler}
 			version, err := nodeClient.Version(ctx, &emptypb.Empty{})
 
 			if testCase.expectedResponse == nil {
@@ -331,13 +331,14 @@ func TestIsReady(t *testing.T) {
 			defer ctrl.Finish()
 			ctx := t.Context()
 
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().GetStatusCode(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().GetStatusCode(
 				gomock.Any(),
 				healthEndpoint,
 			).Return(tc.statusCode, tc.err)
+			handler.EXPECT().Host().Return("http://localhost:3500").AnyTimes()
 
-			nodeClient := &beaconApiNodeClient{jsonRestHandler: jsonRestHandler}
+			nodeClient := &beaconApiNodeClient{handler: handler}
 			result := nodeClient.IsReady(ctx)
 
 			assert.Equal(t, tc.expectedResult, result)

validator/client/beacon-api/beacon_api_validator_client.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/OffchainLabs/prysm/v7/api/client/event"
+	"github.com/OffchainLabs/prysm/v7/api/fallback"
 	"github.com/OffchainLabs/prysm/v7/api/rest"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
 	"github.com/OffchainLabs/prysm/v7/encoding/bytesutil"
@@ -23,22 +24,28 @@ type beaconApiValidatorClient struct {
 	genesisProvider         GenesisProvider
 	dutiesProvider          dutiesProvider
 	stateValidatorsProvider StateValidatorsProvider
-	jsonRestHandler         rest.RestHandler
+	restProvider            rest.RestConnectionProvider
+	handler                 rest.Handler
+	nodeClient              *beaconApiNodeClient
 	beaconBlockConverter    BeaconBlockConverter
 	prysmChainClient        iface.PrysmChainClient
 	isEventStreamRunning    bool
 }
 
-func NewBeaconApiValidatorClient(jsonRestHandler rest.RestHandler, opts ...ValidatorClientOpt) iface.ValidatorClient {
+func NewBeaconApiValidatorClient(provider rest.RestConnectionProvider, opts ...ValidatorClientOpt) iface.ValidatorClient {
+	handler := provider.Handler()
+	nc := &beaconApiNodeClient{handler: handler}
 	c := &beaconApiValidatorClient{
-		genesisProvider:         &beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler},
-		dutiesProvider:          beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler},
-		stateValidatorsProvider: beaconApiStateValidatorsProvider{jsonRestHandler: jsonRestHandler},
-		jsonRestHandler:         jsonRestHandler,
+		genesisProvider:         &beaconApiGenesisProvider{handler: handler},
+		dutiesProvider:          beaconApiDutiesProvider{handler: handler},
+		stateValidatorsProvider: beaconApiStateValidatorsProvider{handler: handler},
+		restProvider:            provider,
+		handler:                 handler,
+		nodeClient:              nc,
 		beaconBlockConverter:    beaconApiBeaconBlockConverter{},
 		prysmChainClient: prysmChainClient{
-			nodeClient:      &beaconApiNodeClient{jsonRestHandler: jsonRestHandler},
-			jsonRestHandler: jsonRestHandler,
+			nodeClient: nc,
+			handler:    handler,
 		},
 		isEventStreamRunning: false,
 	}
@@ -280,8 +287,8 @@ func (c *beaconApiValidatorClient) WaitForChainStart(ctx context.Context, _ *emp
 }
 
 func (c *beaconApiValidatorClient) StartEventStream(ctx context.Context, topics []string, eventsChannel chan<- *event.Event) {
-	client := &http.Client{} // event stream should not be subject to the same settings as other api calls, so we won't use c.jsonRestHandler.HttpClient()
-	eventStream, err := event.NewEventStream(ctx, client, c.jsonRestHandler.Host(), topics)
+	client := &http.Client{} // event stream should not be subject to the same settings as other api calls
+	eventStream, err := event.NewEventStream(ctx, client, c.handler.Host(), topics)
 	if err != nil {
 		eventsChannel <- &event.Event{
 			EventType: event.EventError,
@@ -329,9 +336,9 @@ func wrapInMetrics[Resp any](action string, f func() (Resp, error)) (Resp, error
 }
 
 func (c *beaconApiValidatorClient) Host() string {
-	return c.jsonRestHandler.Host()
+	return c.handler.Host()
 }
 
-func (c *beaconApiValidatorClient) SwitchHost(host string) {
-	c.jsonRestHandler.SwitchHost(host)
+func (c *beaconApiValidatorClient) EnsureReady(ctx context.Context) bool {
+	return fallback.EnsureReady(ctx, c.restProvider, c.nodeClient)
 }

validator/client/beacon-api/beacon_api_validator_client_test.go

@@ -31,9 +31,9 @@ func TestBeaconApiValidatorClient_GetAttestationDataValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 	produceAttestationDataResponseJson := structs.GetAttestationDataResponse{}
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v1/validator/attestation_data?committee_index=%d&slot=%d", committeeIndex, slot),
 		&produceAttestationDataResponseJson,
@@ -44,7 +44,7 @@ func TestBeaconApiValidatorClient_GetAttestationDataValid(t *testing.T) {
 		generateValidAttestation(uint64(slot), uint64(committeeIndex)),
 	).Times(2)
 
-	validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := beaconApiValidatorClient{handler: handler}
 	expectedResp, expectedErr := validatorClient.attestationData(ctx, slot, committeeIndex)
 
 	resp, err := validatorClient.AttestationData(
@@ -65,9 +65,9 @@ func TestBeaconApiValidatorClient_GetAttestationDataError(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 	produceAttestationDataResponseJson := structs.GetAttestationDataResponse{}
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v1/validator/attestation_data?committee_index=%d&slot=%d", committeeIndex, slot),
 		&produceAttestationDataResponseJson,
@@ -78,7 +78,7 @@ func TestBeaconApiValidatorClient_GetAttestationDataError(t *testing.T) {
 		generateValidAttestation(uint64(slot), uint64(committeeIndex)),
 	).Times(2)
 
-	validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := beaconApiValidatorClient{handler: handler}
 	expectedResp, expectedErr := validatorClient.attestationData(ctx, slot, committeeIndex)
 
 	resp, err := validatorClient.AttestationData(
@@ -139,8 +139,8 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().PostSSZ(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().PostSSZ(
 		gomock.Any(),
 		"/eth/v2/beacon/blocks",
 		gomock.Any(),
@@ -149,7 +149,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockValid(t *testing.T) {
 		nil, nil, nil,
 	).Times(1)
 
-	validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := beaconApiValidatorClient{handler: handler}
 	expectedResp, expectedErr := validatorClient.proposeBeaconBlock(
 		ctx,
 		&ethpb.GenericSignedBeaconBlock{
@@ -166,8 +166,8 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockError_ThenPass(t *testing.T)
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().PostSSZ(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().PostSSZ(
 		gomock.Any(),
 		"/eth/v2/beacon/blocks",
 		gomock.Any(),
@@ -179,7 +179,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockError_ThenPass(t *testing.T)
 		},
 	).Times(1)
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/beacon/blocks",
 		gomock.Any(),
@@ -189,7 +189,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockError_ThenPass(t *testing.T)
 		nil,
 	).Times(1)
 
-	validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := beaconApiValidatorClient{handler: handler}
 	expectedResp, expectedErr := validatorClient.proposeBeaconBlock(
 		ctx,
 		&ethpb.GenericSignedBeaconBlock{
@@ -308,10 +308,10 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockAllTypes(t *testing.T) {
 			defer ctrl.Finish()
 
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			if !tt.wantErr {
-				jsonRestHandler.EXPECT().PostSSZ(
+				handler.EXPECT().PostSSZ(
 					gomock.Any(),
 					tt.expectedPath,
 					gomock.Any(),
@@ -319,7 +319,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockAllTypes(t *testing.T) {
 				).Return(nil, nil, nil).Times(1)
 			}
 
-			validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := beaconApiValidatorClient{handler: handler}
 			resp, err := validatorClient.proposeBeaconBlock(ctx, tt.block)
 
 			if tt.wantErr {
@@ -366,9 +366,9 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockHTTPErrors(t *testing.T) {
 			defer ctrl.Finish()
 
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
-			jsonRestHandler.EXPECT().PostSSZ(
+			handler.EXPECT().PostSSZ(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks",
 				gomock.Any(),
@@ -377,7 +377,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockHTTPErrors(t *testing.T) {
 
 			if tt.expectJSON {
 				// When SSZ fails, it falls back to JSON
-				jsonRestHandler.EXPECT().Post(
+				handler.EXPECT().Post(
 					gomock.Any(),
 					"/eth/v2/beacon/blocks",
 					gomock.Any(),
@@ -386,7 +386,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockHTTPErrors(t *testing.T) {
 				).Return(tt.sszError).Times(1)
 			}
 
-			validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := beaconApiValidatorClient{handler: handler}
 			_, err := validatorClient.proposeBeaconBlock(
 				ctx,
 				&ethpb.GenericSignedBeaconBlock{
@@ -507,10 +507,10 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockJSONFallback(t *testing.T) {
 			defer ctrl.Finish()
 
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			// SSZ call fails with 406 to trigger JSON fallback
-			jsonRestHandler.EXPECT().PostSSZ(
+			handler.EXPECT().PostSSZ(
 				gomock.Any(),
 				tt.expectedPath,
 				gomock.Any(),
@@ -521,7 +521,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockJSONFallback(t *testing.T) {
 			}).Times(1)
 
 			// JSON fallback
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				tt.expectedPath,
 				gomock.Any(),
@@ -529,7 +529,7 @@ func TestBeaconApiValidatorClient_ProposeBeaconBlockJSONFallback(t *testing.T) {
 				gomock.Any(),
 			).Return(tt.jsonError).Times(1)
 
-			validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := beaconApiValidatorClient{handler: handler}
 			resp, err := validatorClient.proposeBeaconBlock(ctx, tt.block)
 
 			if tt.wantErr {
@@ -547,29 +547,12 @@ func TestBeaconApiValidatorClient_Host(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	hosts := []string{"http://localhost:8080", "http://localhost:8081"}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().SwitchHost(
-		hosts[0],
-	).Times(1)
-	jsonRestHandler.EXPECT().Host().Return(
-		hosts[0],
-	).Times(1)
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Host().Return("http://localhost:8080").Times(1)
 
-	validatorClient := beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
-	validatorClient.SwitchHost(hosts[0])
+	validatorClient := beaconApiValidatorClient{handler: handler}
 	host := validatorClient.Host()
-	require.Equal(t, hosts[0], host)
-
-	jsonRestHandler.EXPECT().SwitchHost(
-		hosts[1],
-	).Times(1)
-	jsonRestHandler.EXPECT().Host().Return(
-		hosts[1],
-	).Times(1)
-	validatorClient.SwitchHost(hosts[1])
-	host = validatorClient.Host()
-	require.Equal(t, hosts[1], host)
+	require.Equal(t, "http://localhost:8080", host)
 }
 
 // Helper functions for generating test blocks for newer consensus versions

validator/client/beacon-api/beacon_committee_selections.go

@@ -20,7 +20,7 @@ func (c *beaconApiValidatorClient) aggregatedSelection(ctx context.Context, sele
 	}
 
 	var resp aggregatedSelectionResponse
-	err = c.jsonRestHandler.Post(ctx, "/eth/v1/validator/beacon_committee_selections", nil, bytes.NewBuffer(body), &resp)
+	err = c.handler.Post(ctx, "/eth/v1/validator/beacon_committee_selections", nil, bytes.NewBuffer(body), &resp)
 	if err != nil {
 		return nil, errors.Wrap(err, "error calling post endpoint")
 	}

validator/client/beacon-api/beacon_committee_selections_test.go

@@ -89,13 +89,13 @@ func TestGetAggregatedSelections(t *testing.T) {
 	for _, test := range testcases {
 		t.Run(test.name, func(t *testing.T) {
 			ctrl := gomock.NewController(t)
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			reqBody, err := json.Marshal(test.req)
 			require.NoError(t, err)
 
 			ctx := t.Context()
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				"/eth/v1/validator/beacon_committee_selections",
 				nil,
@@ -108,7 +108,7 @@ func TestGetAggregatedSelections(t *testing.T) {
 				test.endpointError,
 			).Times(1)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			res, err := validatorClient.AggregatedSelections(ctx, test.req)
 			if test.expectedErrorMessage != "" {
 				require.ErrorContains(t, test.expectedErrorMessage, err)

validator/client/beacon-api/doppelganger_test.go

@@ -288,12 +288,12 @@ func TestCheckDoppelGanger_Nominal(t *testing.T) {
 			ctrl := gomock.NewController(t)
 			defer ctrl.Finish()
 
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			if testCase.getSyncingOutput != nil {
 				syncingResponseJson := structs.SyncStatusResponse{}
 
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					syncingEndpoint,
 					&syncingResponseJson,
@@ -308,7 +308,7 @@ func TestCheckDoppelGanger_Nominal(t *testing.T) {
 			if testCase.getForkOutput != nil {
 				stateForkResponseJson := structs.GetStateForkResponse{}
 
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					forkEndpoint,
 					&stateForkResponseJson,
@@ -323,7 +323,7 @@ func TestCheckDoppelGanger_Nominal(t *testing.T) {
 			if testCase.getHeadersOutput != nil {
 				blockHeadersResponseJson := structs.GetBlockHeadersResponse{}
 
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					headersEndpoint,
 					&blockHeadersResponseJson,
@@ -342,7 +342,7 @@ func TestCheckDoppelGanger_Nominal(t *testing.T) {
 					marshalledIndexes, err := json.Marshal(iface.inputStringIndexes)
 					require.NoError(t, err)
 
-					jsonRestHandler.EXPECT().Post(
+					handler.EXPECT().Post(
 						gomock.Any(),
 						iface.inputUrl,
 						nil,
@@ -372,7 +372,7 @@ func TestCheckDoppelGanger_Nominal(t *testing.T) {
 			}
 
 			validatorClient := beaconApiValidatorClient{
-				jsonRestHandler:         jsonRestHandler,
+				handler:                 handler,
 				stateValidatorsProvider: stateValidatorsProvider,
 			}
 
@@ -722,12 +722,12 @@ func TestCheckDoppelGanger_Errors(t *testing.T) {
 			ctrl := gomock.NewController(t)
 			defer ctrl.Finish()
 
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			if testCase.getSyncingOutput != nil {
 				syncingResponseJson := structs.SyncStatusResponse{}
 
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					syncingEndpoint,
 					&syncingResponseJson,
@@ -742,7 +742,7 @@ func TestCheckDoppelGanger_Errors(t *testing.T) {
 			if testCase.getForkOutput != nil {
 				stateForkResponseJson := structs.GetStateForkResponse{}
 
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					forkEndpoint,
 					&stateForkResponseJson,
@@ -757,7 +757,7 @@ func TestCheckDoppelGanger_Errors(t *testing.T) {
 			if testCase.getHeadersOutput != nil {
 				blockHeadersResponseJson := structs.GetBlockHeadersResponse{}
 
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					headersEndpoint,
 					&blockHeadersResponseJson,
@@ -790,7 +790,7 @@ func TestCheckDoppelGanger_Errors(t *testing.T) {
 					marshalledIndexes, err := json.Marshal(iface.inputStringIndexes)
 					require.NoError(t, err)
 
-					jsonRestHandler.EXPECT().Post(
+					handler.EXPECT().Post(
 						gomock.Any(),
 						iface.inputUrl,
 						nil,
@@ -806,7 +806,7 @@ func TestCheckDoppelGanger_Errors(t *testing.T) {
 			}
 
 			validatorClient := beaconApiValidatorClient{
-				jsonRestHandler:         jsonRestHandler,
+				handler:                 handler,
 				stateValidatorsProvider: stateValidatorsProvider,
 			}
 

validator/client/beacon-api/duties.go

@@ -28,7 +28,7 @@ type dutiesProvider interface {
 }
 
 type beaconApiDutiesProvider struct {
-	jsonRestHandler rest.RestHandler
+	handler rest.Handler
 }
 
 type attesterDuty struct {
@@ -66,12 +66,13 @@ func (c *beaconApiValidatorClient) duties(ctx context.Context, in *ethpb.DutiesR
 	}()
 
 	nextEpochDuties := &ethpb.ValidatorDutiesContainer{}
-	if err := c.dutiesForEpoch(ctx, nextEpochDuties, in.Epoch+1, vals, fetchSyncDuties); err != nil {
-		return nil, errors.Wrapf(err, "failed to get duties for next epoch `%d`", in.Epoch+1)
-	}
+	nextEpochErr := c.dutiesForEpoch(ctx, nextEpochDuties, in.Epoch+1, vals, fetchSyncDuties)
 
-	if err = <-errCh; err != nil {
-		return nil, err
+	if currEpochErr := <-errCh; currEpochErr != nil {
+		return nil, currEpochErr
+	}
+	if nextEpochErr != nil {
+		return nil, errors.Wrapf(nextEpochErr, "failed to get duties for next epoch `%d`", in.Epoch+1)
 	}
 
 	return &ethpb.ValidatorDutiesContainer{
@@ -279,7 +280,7 @@ func (c beaconApiDutiesProvider) Committees(ctx context.Context, epoch primitive
 	committeesRequest := apiutil.BuildURL("/eth/v1/beacon/states/head/committees", committeeParams)
 
 	var stateCommittees structs.GetCommitteesResponse
-	if err := c.jsonRestHandler.Get(ctx, committeesRequest, &stateCommittees); err != nil {
+	if err := c.handler.Get(ctx, committeesRequest, &stateCommittees); err != nil {
 		return nil, err
 	}
 
@@ -309,7 +310,7 @@ func (c beaconApiDutiesProvider) AttesterDuties(ctx context.Context, epoch primi
 	}
 
 	attesterDuties := &structs.GetAttesterDutiesResponse{}
-	if err = c.jsonRestHandler.Post(
+	if err = c.handler.Post(
 		ctx,
 		fmt.Sprintf("/eth/v1/validator/duties/attester/%d", epoch),
 		nil,
@@ -331,7 +332,7 @@ func (c beaconApiDutiesProvider) AttesterDuties(ctx context.Context, epoch primi
 // ProposerDuties retrieves the proposer duties for the given epoch
 func (c beaconApiDutiesProvider) ProposerDuties(ctx context.Context, epoch primitives.Epoch) (*structs.GetProposerDutiesResponse, error) {
 	proposerDuties := &structs.GetProposerDutiesResponse{}
-	if err := c.jsonRestHandler.Get(ctx, fmt.Sprintf("/eth/v1/validator/duties/proposer/%d", epoch), proposerDuties); err != nil {
+	if err := c.handler.Get(ctx, fmt.Sprintf("/eth/v1/validator/duties/proposer/%d", epoch), proposerDuties); err != nil {
 		return nil, err
 	}
 
@@ -361,7 +362,7 @@ func (c beaconApiDutiesProvider) SyncDuties(ctx context.Context, epoch primitive
 	}
 
 	syncDuties := structs.GetSyncCommitteeDutiesResponse{}
-	if err = c.jsonRestHandler.Post(
+	if err = c.handler.Post(
 		ctx,
 		fmt.Sprintf("/eth/v1/validator/duties/sync/%d", epoch),
 		nil,

validator/client/beacon-api/duties_test.go

@@ -60,8 +60,8 @@ func TestGetAttesterDuties_Valid(t *testing.T) {
 	ctx := t.Context()
 
 	validatorIndices := []primitives.ValidatorIndex{2, 9}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getAttesterDutiesTestEndpoint, epoch),
 		nil,
@@ -74,7 +74,7 @@ func TestGetAttesterDuties_Valid(t *testing.T) {
 		expectedAttesterDuties,
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	attesterDuties, err := dutiesProvider.AttesterDuties(ctx, epoch, validatorIndices)
 	require.NoError(t, err)
 	assert.DeepEqual(t, expectedAttesterDuties.Data, attesterDuties.Data)
@@ -88,8 +88,8 @@ func TestGetAttesterDuties_HttpError(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getAttesterDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -99,7 +99,7 @@ func TestGetAttesterDuties_HttpError(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.AttesterDuties(ctx, epoch, nil)
 	assert.ErrorContains(t, "foo error", err)
 }
@@ -112,8 +112,8 @@ func TestGetAttesterDuties_NilAttesterDuty(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getAttesterDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -128,7 +128,7 @@ func TestGetAttesterDuties_NilAttesterDuty(t *testing.T) {
 		},
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.AttesterDuties(ctx, epoch, nil)
 	assert.ErrorContains(t, "attester duty at index `0` is nil", err)
 }
@@ -156,8 +156,8 @@ func TestGetProposerDuties_Valid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getProposerDutiesTestEndpoint, epoch),
 		&structs.GetProposerDutiesResponse{},
@@ -168,7 +168,7 @@ func TestGetProposerDuties_Valid(t *testing.T) {
 		expectedProposerDuties,
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	proposerDuties, err := dutiesProvider.ProposerDuties(ctx, epoch)
 	require.NoError(t, err)
 	assert.DeepEqual(t, expectedProposerDuties.Data, proposerDuties.Data)
@@ -182,8 +182,8 @@ func TestGetProposerDuties_HttpError(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getProposerDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -191,7 +191,7 @@ func TestGetProposerDuties_HttpError(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.ProposerDuties(ctx, epoch)
 	assert.ErrorContains(t, "foo error", err)
 }
@@ -204,8 +204,8 @@ func TestGetProposerDuties_NilData(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getProposerDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -218,7 +218,7 @@ func TestGetProposerDuties_NilData(t *testing.T) {
 		},
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.ProposerDuties(ctx, epoch)
 	assert.ErrorContains(t, "proposer duties data is nil", err)
 }
@@ -231,8 +231,8 @@ func TestGetProposerDuties_NilProposerDuty(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getProposerDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -245,7 +245,7 @@ func TestGetProposerDuties_NilProposerDuty(t *testing.T) {
 		},
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.ProposerDuties(ctx, epoch)
 	assert.ErrorContains(t, "proposer duty at index `0` is nil", err)
 }
@@ -284,8 +284,8 @@ func TestGetSyncDuties_Valid(t *testing.T) {
 	ctx := t.Context()
 
 	validatorIndices := []primitives.ValidatorIndex{2, 6}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getSyncDutiesTestEndpoint, epoch),
 		nil,
@@ -298,7 +298,7 @@ func TestGetSyncDuties_Valid(t *testing.T) {
 		expectedSyncDuties,
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	syncDuties, err := dutiesProvider.SyncDuties(ctx, epoch, validatorIndices)
 	require.NoError(t, err)
 	assert.DeepEqual(t, expectedSyncDuties.Data, syncDuties)
@@ -312,8 +312,8 @@ func TestGetSyncDuties_HttpError(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getSyncDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -323,7 +323,7 @@ func TestGetSyncDuties_HttpError(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.SyncDuties(ctx, epoch, nil)
 	assert.ErrorContains(t, "foo error", err)
 }
@@ -336,8 +336,8 @@ func TestGetSyncDuties_NilData(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getSyncDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -352,7 +352,7 @@ func TestGetSyncDuties_NilData(t *testing.T) {
 		},
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.SyncDuties(ctx, epoch, nil)
 	assert.ErrorContains(t, "sync duties data is nil", err)
 }
@@ -365,8 +365,8 @@ func TestGetSyncDuties_NilSyncDuty(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		fmt.Sprintf("%s/%d", getSyncDutiesTestEndpoint, epoch),
 		gomock.Any(),
@@ -381,7 +381,7 @@ func TestGetSyncDuties_NilSyncDuty(t *testing.T) {
 		},
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.SyncDuties(ctx, epoch, nil)
 	assert.ErrorContains(t, "sync duty at index `0` is nil", err)
 }
@@ -415,8 +415,8 @@ func TestGetCommittees_Valid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s?epoch=%d", getCommitteesTestEndpoint, epoch),
 		&structs.GetCommitteesResponse{},
@@ -427,7 +427,7 @@ func TestGetCommittees_Valid(t *testing.T) {
 		expectedCommittees,
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	committees, err := dutiesProvider.Committees(ctx, epoch)
 	require.NoError(t, err)
 	assert.DeepEqual(t, expectedCommittees.Data, committees)
@@ -441,8 +441,8 @@ func TestGetCommittees_HttpError(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s?epoch=%d", getCommitteesTestEndpoint, epoch),
 		gomock.Any(),
@@ -450,7 +450,7 @@ func TestGetCommittees_HttpError(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.Committees(ctx, epoch)
 	assert.ErrorContains(t, "foo error", err)
 }
@@ -463,8 +463,8 @@ func TestGetCommittees_NilData(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s?epoch=%d", getCommitteesTestEndpoint, epoch),
 		gomock.Any(),
@@ -477,7 +477,7 @@ func TestGetCommittees_NilData(t *testing.T) {
 		},
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.Committees(ctx, epoch)
 	assert.ErrorContains(t, "state committees data is nil", err)
 }
@@ -490,8 +490,8 @@ func TestGetCommittees_NilCommittee(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		fmt.Sprintf("%s?epoch=%d", getCommitteesTestEndpoint, epoch),
 		gomock.Any(),
@@ -504,7 +504,7 @@ func TestGetCommittees_NilCommittee(t *testing.T) {
 		},
 	).Times(1)
 
-	dutiesProvider := &beaconApiDutiesProvider{jsonRestHandler: jsonRestHandler}
+	dutiesProvider := &beaconApiDutiesProvider{handler: handler}
 	_, err := dutiesProvider.Committees(ctx, epoch)
 	assert.ErrorContains(t, "committee at index `0` is nil", err)
 }

validator/client/beacon-api/genesis.go

@@ -21,9 +21,9 @@ type GenesisProvider interface {
 }
 
 type beaconApiGenesisProvider struct {
-	jsonRestHandler rest.RestHandler
-	genesis         *structs.Genesis
-	once            sync.Once
+	handler rest.Handler
+	genesis *structs.Genesis
+	once    sync.Once
 }
 
 func (c *beaconApiValidatorClient) waitForChainStart(ctx context.Context) (*ethpb.ChainStartResponse, error) {
@@ -69,7 +69,7 @@ func (c *beaconApiGenesisProvider) Genesis(ctx context.Context) (*structs.Genesi
 	genesisJson := &structs.GetGenesisResponse{}
 	var doErr error
 	c.once.Do(func() {
-		if err := c.jsonRestHandler.Get(ctx, "/eth/v1/beacon/genesis", genesisJson); err != nil {
+		if err := c.handler.Get(ctx, "/eth/v1/beacon/genesis", genesisJson); err != nil {
 			doErr = err
 			return
 		}

validator/client/beacon-api/genesis_test.go

@@ -18,8 +18,8 @@ func TestGetGenesis_ValidGenesis(t *testing.T) {
 	ctx := t.Context()
 
 	genesisResponseJson := structs.GetGenesisResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -35,7 +35,7 @@ func TestGetGenesis_ValidGenesis(t *testing.T) {
 		},
 	).Times(1)
 
-	genesisProvider := &beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+	genesisProvider := &beaconApiGenesisProvider{handler: handler}
 	resp, err := genesisProvider.Genesis(ctx)
 	assert.NoError(t, err)
 	require.NotNil(t, resp)
@@ -50,8 +50,8 @@ func TestGetGenesis_NilData(t *testing.T) {
 	ctx := t.Context()
 
 	genesisResponseJson := structs.GetGenesisResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -62,7 +62,7 @@ func TestGetGenesis_NilData(t *testing.T) {
 		structs.GetGenesisResponse{Data: nil},
 	).Times(1)
 
-	genesisProvider := &beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+	genesisProvider := &beaconApiGenesisProvider{handler: handler}
 	_, err := genesisProvider.Genesis(ctx)
 	assert.ErrorContains(t, "genesis data is nil", err)
 }
@@ -74,8 +74,8 @@ func TestGetGenesis_EndpointCalledOnlyOnce(t *testing.T) {
 	ctx := t.Context()
 
 	genesisResponseJson := structs.GetGenesisResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -91,7 +91,7 @@ func TestGetGenesis_EndpointCalledOnlyOnce(t *testing.T) {
 		},
 	).Times(1)
 
-	genesisProvider := &beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+	genesisProvider := &beaconApiGenesisProvider{handler: handler}
 	_, err := genesisProvider.Genesis(ctx)
 	assert.NoError(t, err)
 	resp, err := genesisProvider.Genesis(ctx)
@@ -108,15 +108,15 @@ func TestGetGenesis_EndpointCanBeCalledAgainAfterError(t *testing.T) {
 	ctx := t.Context()
 
 	genesisResponseJson := structs.GetGenesisResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
 	).Return(
 		errors.New("foo"),
 	).Times(1)
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -132,7 +132,7 @@ func TestGetGenesis_EndpointCanBeCalledAgainAfterError(t *testing.T) {
 		},
 	).Times(1)
 
-	genesisProvider := &beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+	genesisProvider := &beaconApiGenesisProvider{handler: handler}
 	_, err := genesisProvider.Genesis(ctx)
 	require.ErrorContains(t, "foo", err)
 	resp, err := genesisProvider.Genesis(ctx)

validator/client/beacon-api/get_beacon_block.go

@@ -26,7 +26,7 @@ func (c *beaconApiValidatorClient) beaconBlock(ctx context.Context, slot primiti
 		queryParams.Add("graffiti", hexutil.Encode(graffiti))
 	}
 	queryUrl := apiutil.BuildURL(fmt.Sprintf("/eth/v3/validator/blocks/%d", slot), queryParams)
-	data, header, err := c.jsonRestHandler.GetSSZ(ctx, queryUrl)
+	data, header, err := c.handler.GetSSZ(ctx, queryUrl)
 	if err != nil {
 		return nil, err
 	}
@@ -55,114 +55,153 @@ func (c *beaconApiValidatorClient) beaconBlock(ctx context.Context, slot primiti
 	}
 }
 
+// sszBlockCodec defines SSZ unmarshalers for a fork's block and blinded block types.
+type sszBlockCodec struct {
+	unmarshalBlock   func([]byte) (*ethpb.GenericBeaconBlock, error)
+	unmarshalBlinded func([]byte) (*ethpb.GenericBeaconBlock, error) // nil for Phase0/Altair
+}
+
+type sszCodecEntry struct {
+	minVersion int
+	codec      sszBlockCodec
+}
+
+// sszCodecs is ordered descending by version so that unknown future versions
+// fall through to the latest known fork (matching the original if-cascade).
+var sszCodecs = []sszCodecEntry{
+	{
+		minVersion: version.Fulu,
+		codec: sszBlockCodec{
+			unmarshalBlock: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				block := &ethpb.BeaconBlockContentsFulu{}
+				if err := block.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Fulu{Fulu: block}}, nil
+			},
+			unmarshalBlinded: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				blindedBlock := &ethpb.BlindedBeaconBlockFulu{}
+				if err := blindedBlock.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedFulu{BlindedFulu: blindedBlock}, IsBlinded: true}, nil
+			},
+		},
+	},
+	{
+		minVersion: version.Electra,
+		codec: sszBlockCodec{
+			unmarshalBlock: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				block := &ethpb.BeaconBlockContentsElectra{}
+				if err := block.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Electra{Electra: block}}, nil
+			},
+			unmarshalBlinded: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				blindedBlock := &ethpb.BlindedBeaconBlockElectra{}
+				if err := blindedBlock.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedElectra{BlindedElectra: blindedBlock}, IsBlinded: true}, nil
+			},
+		},
+	},
+	{
+		minVersion: version.Deneb,
+		codec: sszBlockCodec{
+			unmarshalBlock: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				block := &ethpb.BeaconBlockContentsDeneb{}
+				if err := block.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Deneb{Deneb: block}}, nil
+			},
+			unmarshalBlinded: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				blindedBlock := &ethpb.BlindedBeaconBlockDeneb{}
+				if err := blindedBlock.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedDeneb{BlindedDeneb: blindedBlock}, IsBlinded: true}, nil
+			},
+		},
+	},
+	{
+		minVersion: version.Capella,
+		codec: sszBlockCodec{
+			unmarshalBlock: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				block := &ethpb.BeaconBlockCapella{}
+				if err := block.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Capella{Capella: block}}, nil
+			},
+			unmarshalBlinded: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				blindedBlock := &ethpb.BlindedBeaconBlockCapella{}
+				if err := blindedBlock.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedCapella{BlindedCapella: blindedBlock}, IsBlinded: true}, nil
+			},
+		},
+	},
+	{
+		minVersion: version.Bellatrix,
+		codec: sszBlockCodec{
+			unmarshalBlock: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				block := &ethpb.BeaconBlockBellatrix{}
+				if err := block.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Bellatrix{Bellatrix: block}}, nil
+			},
+			unmarshalBlinded: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				blindedBlock := &ethpb.BlindedBeaconBlockBellatrix{}
+				if err := blindedBlock.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedBellatrix{BlindedBellatrix: blindedBlock}, IsBlinded: true}, nil
+			},
+		},
+	},
+	{
+		minVersion: version.Altair,
+		codec: sszBlockCodec{
+			unmarshalBlock: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				block := &ethpb.BeaconBlockAltair{}
+				if err := block.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Altair{Altair: block}}, nil
+			},
+		},
+	},
+	{
+		minVersion: version.Phase0,
+		codec: sszBlockCodec{
+			unmarshalBlock: func(data []byte) (*ethpb.GenericBeaconBlock, error) {
+				block := &ethpb.BeaconBlock{}
+				if err := block.UnmarshalSSZ(data); err != nil {
+					return nil, err
+				}
+				return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Phase0{Phase0: block}}, nil
+			},
+		},
+	},
+}
+
 func processBlockSSZResponse(ver int, data []byte, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if ver >= version.Fulu {
-		return processBlockSSZResponseFulu(data, isBlinded)
-	}
-	if ver >= version.Electra {
-		return processBlockSSZResponseElectra(data, isBlinded)
-	}
-	if ver >= version.Deneb {
-		return processBlockSSZResponseDeneb(data, isBlinded)
-	}
-	if ver >= version.Capella {
-		return processBlockSSZResponseCapella(data, isBlinded)
-	}
-	if ver >= version.Bellatrix {
-		return processBlockSSZResponseBellatrix(data, isBlinded)
-	}
-	if ver >= version.Altair {
-		block := &ethpb.BeaconBlockAltair{}
-		if err := block.UnmarshalSSZ(data); err != nil {
-			return nil, err
+	for _, entry := range sszCodecs {
+		if ver >= entry.minVersion {
+			if isBlinded && entry.codec.unmarshalBlinded != nil {
+				return entry.codec.unmarshalBlinded(data)
+			}
+			return entry.codec.unmarshalBlock(data)
 		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Altair{Altair: block}}, nil
-	}
-	if ver >= version.Phase0 {
-		block := &ethpb.BeaconBlock{}
-		if err := block.UnmarshalSSZ(data); err != nil {
-			return nil, err
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Phase0{Phase0: block}}, nil
 	}
 	return nil, fmt.Errorf("unsupported block version %s", version.String(ver))
 }
 
-func processBlockSSZResponseFulu(data []byte, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		blindedBlock := &ethpb.BlindedBeaconBlockFulu{}
-		if err := blindedBlock.UnmarshalSSZ(data); err != nil {
-			return nil, err
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedFulu{BlindedFulu: blindedBlock}, IsBlinded: true}, nil
-	}
-	block := &ethpb.BeaconBlockContentsFulu{}
-	if err := block.UnmarshalSSZ(data); err != nil {
-		return nil, err
-	}
-	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Fulu{Fulu: block}}, nil
-}
-
-func processBlockSSZResponseElectra(data []byte, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		blindedBlock := &ethpb.BlindedBeaconBlockElectra{}
-		if err := blindedBlock.UnmarshalSSZ(data); err != nil {
-			return nil, err
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedElectra{BlindedElectra: blindedBlock}, IsBlinded: true}, nil
-	}
-	block := &ethpb.BeaconBlockContentsElectra{}
-	if err := block.UnmarshalSSZ(data); err != nil {
-		return nil, err
-	}
-	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Electra{Electra: block}}, nil
-}
-
-func processBlockSSZResponseDeneb(data []byte, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		blindedBlock := &ethpb.BlindedBeaconBlockDeneb{}
-		if err := blindedBlock.UnmarshalSSZ(data); err != nil {
-			return nil, err
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedDeneb{BlindedDeneb: blindedBlock}, IsBlinded: true}, nil
-	}
-	block := &ethpb.BeaconBlockContentsDeneb{}
-	if err := block.UnmarshalSSZ(data); err != nil {
-		return nil, err
-	}
-	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Deneb{Deneb: block}}, nil
-}
-
-func processBlockSSZResponseCapella(data []byte, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		blindedBlock := &ethpb.BlindedBeaconBlockCapella{}
-		if err := blindedBlock.UnmarshalSSZ(data); err != nil {
-			return nil, err
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedCapella{BlindedCapella: blindedBlock}, IsBlinded: true}, nil
-	}
-	block := &ethpb.BeaconBlockCapella{}
-	if err := block.UnmarshalSSZ(data); err != nil {
-		return nil, err
-	}
-	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Capella{Capella: block}}, nil
-}
-
-func processBlockSSZResponseBellatrix(data []byte, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		blindedBlock := &ethpb.BlindedBeaconBlockBellatrix{}
-		if err := blindedBlock.UnmarshalSSZ(data); err != nil {
-			return nil, err
-		}
-		return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_BlindedBellatrix{BlindedBellatrix: blindedBlock}, IsBlinded: true}, nil
-	}
-	block := &ethpb.BeaconBlockBellatrix{}
-	if err := block.UnmarshalSSZ(data); err != nil {
-		return nil, err
-	}
-	return &ethpb.GenericBeaconBlock{Block: &ethpb.GenericBeaconBlock_Bellatrix{Bellatrix: block}}, nil
-}
-
 func convertBlockToGeneric(decoder *json.Decoder, dest ethpb.GenericConverter, version string, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
 	typeName := version
 	if isBlinded {
@@ -180,69 +219,52 @@ func convertBlockToGeneric(decoder *json.Decoder, dest ethpb.GenericConverter, v
 	return genericBlock, nil
 }
 
+// jsonBlockTypes defines factory functions for creating block and blinded block structs for JSON decoding.
+type jsonBlockTypes struct {
+	newBlock   func() ethpb.GenericConverter
+	newBlinded func() ethpb.GenericConverter // nil for Phase0/Altair
+}
+
+var jsonBlockFactories = map[string]jsonBlockTypes{
+	version.String(version.Phase0): {
+		newBlock: func() ethpb.GenericConverter { return &structs.BeaconBlock{} },
+	},
+	version.String(version.Altair): {
+		newBlock: func() ethpb.GenericConverter { return &structs.BeaconBlockAltair{} },
+	},
+	version.String(version.Bellatrix): {
+		newBlock:   func() ethpb.GenericConverter { return &structs.BeaconBlockBellatrix{} },
+		newBlinded: func() ethpb.GenericConverter { return &structs.BlindedBeaconBlockBellatrix{} },
+	},
+	version.String(version.Capella): {
+		newBlock:   func() ethpb.GenericConverter { return &structs.BeaconBlockCapella{} },
+		newBlinded: func() ethpb.GenericConverter { return &structs.BlindedBeaconBlockCapella{} },
+	},
+	version.String(version.Deneb): {
+		newBlock:   func() ethpb.GenericConverter { return &structs.BeaconBlockContentsDeneb{} },
+		newBlinded: func() ethpb.GenericConverter { return &structs.BlindedBeaconBlockDeneb{} },
+	},
+	version.String(version.Electra): {
+		newBlock:   func() ethpb.GenericConverter { return &structs.BeaconBlockContentsElectra{} },
+		newBlinded: func() ethpb.GenericConverter { return &structs.BlindedBeaconBlockElectra{} },
+	},
+	version.String(version.Fulu): {
+		newBlock:   func() ethpb.GenericConverter { return &structs.BeaconBlockContentsFulu{} },
+		newBlinded: func() ethpb.GenericConverter { return &structs.BlindedBeaconBlockFulu{} },
+	},
+}
+
 func processBlockJSONResponse(ver string, isBlinded bool, decoder *json.Decoder) (*ethpb.GenericBeaconBlock, error) {
 	if decoder == nil {
 		return nil, errors.New("no produce block json decoder found")
 	}
 
-	switch ver {
-	case version.String(version.Phase0):
-		return convertBlockToGeneric(decoder, &structs.BeaconBlock{}, version.String(version.Phase0), false)
-
-	case version.String(version.Altair):
-		return convertBlockToGeneric(decoder, &structs.BeaconBlockAltair{}, "altair", false)
-
-	case version.String(version.Bellatrix):
-		return processBellatrixBlock(decoder, isBlinded)
-
-	case version.String(version.Capella):
-		return processCapellaBlock(decoder, isBlinded)
-
-	case version.String(version.Deneb):
-		return processDenebBlock(decoder, isBlinded)
-
-	case version.String(version.Electra):
-		return processElectraBlock(decoder, isBlinded)
-
-	case version.String(version.Fulu):
-		return processFuluBlock(decoder, isBlinded)
-
-	default:
+	factory, ok := jsonBlockFactories[ver]
+	if !ok {
 		return nil, errors.Errorf("unsupported consensus version `%s`", ver)
 	}
-}
-
-func processBellatrixBlock(decoder *json.Decoder, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		return convertBlockToGeneric(decoder, &structs.BlindedBeaconBlockBellatrix{}, "bellatrix", true)
+	if isBlinded && factory.newBlinded != nil {
+		return convertBlockToGeneric(decoder, factory.newBlinded(), ver, true)
 	}
-	return convertBlockToGeneric(decoder, &structs.BeaconBlockBellatrix{}, "bellatrix", false)
-}
-
-func processCapellaBlock(decoder *json.Decoder, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		return convertBlockToGeneric(decoder, &structs.BlindedBeaconBlockCapella{}, "capella", true)
-	}
-	return convertBlockToGeneric(decoder, &structs.BeaconBlockCapella{}, "capella", false)
-}
-
-func processDenebBlock(decoder *json.Decoder, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		return convertBlockToGeneric(decoder, &structs.BlindedBeaconBlockDeneb{}, "deneb", true)
-	}
-	return convertBlockToGeneric(decoder, &structs.BeaconBlockContentsDeneb{}, "deneb", false)
-}
-
-func processElectraBlock(decoder *json.Decoder, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		return convertBlockToGeneric(decoder, &structs.BlindedBeaconBlockElectra{}, "electra", true)
-	}
-	return convertBlockToGeneric(decoder, &structs.BeaconBlockContentsElectra{}, "electra", false)
-}
-
-func processFuluBlock(decoder *json.Decoder, isBlinded bool) (*ethpb.GenericBeaconBlock, error) {
-	if isBlinded {
-		return convertBlockToGeneric(decoder, &structs.BlindedBeaconBlockFulu{}, "fulu", true)
-	}
-	return convertBlockToGeneric(decoder, &structs.BeaconBlockContentsFulu{}, "fulu", false)
+	return convertBlockToGeneric(decoder, factory.newBlock(), ver, false)
 }

validator/client/beacon-api/get_beacon_block_test.go

@@ -11,6 +11,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/api/server/structs"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
 	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
 	"github.com/OffchainLabs/prysm/v7/testing/assert"
 	"github.com/OffchainLabs/prysm/v7/testing/require"
 	"github.com/OffchainLabs/prysm/v7/validator/client/beacon-api/mock"
@@ -25,8 +26,8 @@ func TestGetBeaconBlock_RequestFailed(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		gomock.Any(),
 	).Return(
@@ -35,7 +36,7 @@ func TestGetBeaconBlock_RequestFailed(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.beaconBlock(ctx, 1, []byte{1}, []byte{2})
 	assert.ErrorContains(t, "foo error", err)
 }
@@ -149,8 +150,8 @@ func TestGetBeaconBlock_Error(t *testing.T) {
 
 			b, err := json.Marshal(resp)
 			require.NoError(t, err)
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().GetSSZ(
+			handler := mock.NewMockHandler(ctrl)
+			handler.EXPECT().GetSSZ(
 				gomock.Any(),
 				gomock.Any(),
 			).Return(
@@ -159,7 +160,7 @@ func TestGetBeaconBlock_Error(t *testing.T) {
 				nil,
 			).Times(1)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			_, err = validatorClient.beaconBlock(ctx, 1, []byte{1}, []byte{2})
 			assert.ErrorContains(t, testCase.expectedErrorMessage, err)
 		})
@@ -185,8 +186,8 @@ func TestGetBeaconBlock_Phase0Valid(t *testing.T) {
 		Data:    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -195,7 +196,7 @@ func TestGetBeaconBlock_Phase0Valid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -208,6 +209,25 @@ func TestGetBeaconBlock_Phase0Valid(t *testing.T) {
 	assert.DeepEqual(t, expectedBeaconBlock, beaconBlock)
 }
 
+func TestSSZCodecs_OrderAndCoverage(t *testing.T) {
+	versions := version.All()
+	require.NotEmpty(t, versions)
+
+	expected := make([]int, 0, len(versions))
+	for i := len(versions) - 1; i >= 0; i-- {
+		expected = append(expected, versions[i])
+	}
+
+	require.Equal(t, len(expected), len(sszCodecs))
+
+	for i, entry := range sszCodecs {
+		assert.Equal(t, expected[i], entry.minVersion, "sszCodecs[%d] has wrong fork order", i)
+		if i > 0 {
+			require.Equal(t, true, entry.minVersion < sszCodecs[i-1].minVersion, "sszCodecs not strictly descending at index %d", i)
+		}
+	}
+}
+
 // Add SSZ test cases below this line
 
 func TestGetBeaconBlock_SSZ_BellatrixValid(t *testing.T) {
@@ -224,8 +244,8 @@ func TestGetBeaconBlock_SSZ_BellatrixValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -238,7 +258,7 @@ func TestGetBeaconBlock_SSZ_BellatrixValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -266,8 +286,8 @@ func TestGetBeaconBlock_SSZ_BlindedBellatrixValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -280,7 +300,7 @@ func TestGetBeaconBlock_SSZ_BlindedBellatrixValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -308,8 +328,8 @@ func TestGetBeaconBlock_SSZ_CapellaValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -322,7 +342,7 @@ func TestGetBeaconBlock_SSZ_CapellaValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -350,8 +370,8 @@ func TestGetBeaconBlock_SSZ_BlindedCapellaValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -364,7 +384,7 @@ func TestGetBeaconBlock_SSZ_BlindedCapellaValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -392,8 +412,8 @@ func TestGetBeaconBlock_SSZ_DenebValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -406,7 +426,7 @@ func TestGetBeaconBlock_SSZ_DenebValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -434,8 +454,8 @@ func TestGetBeaconBlock_SSZ_BlindedDenebValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -448,7 +468,7 @@ func TestGetBeaconBlock_SSZ_BlindedDenebValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -476,8 +496,8 @@ func TestGetBeaconBlock_SSZ_ElectraValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -490,7 +510,7 @@ func TestGetBeaconBlock_SSZ_ElectraValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -518,8 +538,8 @@ func TestGetBeaconBlock_SSZ_BlindedElectraValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -532,7 +552,7 @@ func TestGetBeaconBlock_SSZ_BlindedElectraValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -546,6 +566,90 @@ func TestGetBeaconBlock_SSZ_BlindedElectraValid(t *testing.T) {
 	assert.DeepEqual(t, expectedBeaconBlock, beaconBlock)
 }
 
+func TestGetBeaconBlock_SSZ_FuluValid(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	proto := testhelpers.GenerateProtoFuluBeaconBlockContents()
+	bytes, err := proto.MarshalSSZ()
+	require.NoError(t, err)
+
+	const slot = primitives.Slot(1)
+	randaoReveal := []byte{2}
+	graffiti := []byte{3}
+
+	ctx := t.Context()
+
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
+		gomock.Any(),
+		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
+	).Return(
+		bytes,
+		http.Header{
+			"Content-Type":                    []string{api.OctetStreamMediaType},
+			api.VersionHeader:                 []string{"fulu"},
+			api.ExecutionPayloadBlindedHeader: []string{"false"},
+		},
+		nil,
+	).Times(1)
+
+	validatorClient := &beaconApiValidatorClient{handler: handler}
+	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
+	require.NoError(t, err)
+
+	expectedBeaconBlock := &ethpb.GenericBeaconBlock{
+		Block: &ethpb.GenericBeaconBlock_Fulu{
+			Fulu: proto,
+		},
+		IsBlinded: false,
+	}
+
+	assert.DeepEqual(t, expectedBeaconBlock, beaconBlock)
+}
+
+func TestGetBeaconBlock_SSZ_BlindedFuluValid(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	proto := testhelpers.GenerateProtoBlindedFuluBeaconBlock()
+	bytes, err := proto.MarshalSSZ()
+	require.NoError(t, err)
+
+	const slot = primitives.Slot(1)
+	randaoReveal := []byte{2}
+	graffiti := []byte{3}
+
+	ctx := t.Context()
+
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
+		gomock.Any(),
+		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
+	).Return(
+		bytes,
+		http.Header{
+			"Content-Type":                    []string{api.OctetStreamMediaType},
+			api.VersionHeader:                 []string{"fulu"},
+			api.ExecutionPayloadBlindedHeader: []string{"true"},
+		},
+		nil,
+	).Times(1)
+
+	validatorClient := &beaconApiValidatorClient{handler: handler}
+	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
+	require.NoError(t, err)
+
+	expectedBeaconBlock := &ethpb.GenericBeaconBlock{
+		Block: &ethpb.GenericBeaconBlock_BlindedFulu{
+			BlindedFulu: proto,
+		},
+		IsBlinded: true,
+	}
+
+	assert.DeepEqual(t, expectedBeaconBlock, beaconBlock)
+}
+
 func TestGetBeaconBlock_SSZ_UnsupportedVersion(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
@@ -556,8 +660,8 @@ func TestGetBeaconBlock_SSZ_UnsupportedVersion(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -570,7 +674,7 @@ func TestGetBeaconBlock_SSZ_UnsupportedVersion(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	assert.ErrorContains(t, "version name doesn't map to a known value in the enum", err)
 }
@@ -589,8 +693,8 @@ func TestGetBeaconBlock_SSZ_InvalidBlindedHeader(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -603,7 +707,7 @@ func TestGetBeaconBlock_SSZ_InvalidBlindedHeader(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err = validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	assert.ErrorContains(t, "strconv.ParseBool: parsing \"invalid\": invalid syntax", err)
 }
@@ -622,8 +726,8 @@ func TestGetBeaconBlock_SSZ_InvalidVersionHeader(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -636,7 +740,7 @@ func TestGetBeaconBlock_SSZ_InvalidVersionHeader(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err = validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	assert.ErrorContains(t, "unsupported header version invalid", err)
 }
@@ -651,8 +755,8 @@ func TestGetBeaconBlock_SSZ_GetSSZError(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -661,7 +765,7 @@ func TestGetBeaconBlock_SSZ_GetSSZError(t *testing.T) {
 		errors.New("get ssz error"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	assert.ErrorContains(t, "get ssz error", err)
 }
@@ -680,8 +784,8 @@ func TestGetBeaconBlock_SSZ_Phase0Valid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -694,7 +798,7 @@ func TestGetBeaconBlock_SSZ_Phase0Valid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -722,8 +826,8 @@ func TestGetBeaconBlock_SSZ_AltairValid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -736,7 +840,7 @@ func TestGetBeaconBlock_SSZ_AltairValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -770,8 +874,8 @@ func TestGetBeaconBlock_AltairValid(t *testing.T) {
 		Data:    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -780,7 +884,7 @@ func TestGetBeaconBlock_AltairValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -814,8 +918,8 @@ func TestGetBeaconBlock_BellatrixValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -824,7 +928,7 @@ func TestGetBeaconBlock_BellatrixValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -859,8 +963,8 @@ func TestGetBeaconBlock_BlindedBellatrixValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -869,7 +973,7 @@ func TestGetBeaconBlock_BlindedBellatrixValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -904,8 +1008,8 @@ func TestGetBeaconBlock_CapellaValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -914,7 +1018,7 @@ func TestGetBeaconBlock_CapellaValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -949,8 +1053,8 @@ func TestGetBeaconBlock_BlindedCapellaValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -959,7 +1063,7 @@ func TestGetBeaconBlock_BlindedCapellaValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -973,6 +1077,96 @@ func TestGetBeaconBlock_BlindedCapellaValid(t *testing.T) {
 	assert.DeepEqual(t, expectedBeaconBlock, beaconBlock)
 }
 
+func TestGetBeaconBlock_FuluValid(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	proto := testhelpers.GenerateProtoFuluBeaconBlockContents()
+	block := testhelpers.GenerateJsonFuluBeaconBlockContents()
+	bytes, err := json.Marshal(block)
+	require.NoError(t, err)
+
+	const slot = primitives.Slot(1)
+	randaoReveal := []byte{2}
+	graffiti := []byte{3}
+
+	ctx := t.Context()
+
+	b, err := json.Marshal(structs.ProduceBlockV3Response{
+		Version:                 "fulu",
+		ExecutionPayloadBlinded: false,
+		Data:                    bytes,
+	})
+	require.NoError(t, err)
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
+		gomock.Any(),
+		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
+	).Return(
+		b,
+		http.Header{"Content-Type": []string{"application/json"}},
+		nil,
+	).Times(1)
+
+	validatorClient := &beaconApiValidatorClient{handler: handler}
+	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
+	require.NoError(t, err)
+
+	expectedBeaconBlock := &ethpb.GenericBeaconBlock{
+		Block: &ethpb.GenericBeaconBlock_Fulu{
+			Fulu: proto,
+		},
+		IsBlinded: false,
+	}
+
+	assert.DeepEqual(t, expectedBeaconBlock, beaconBlock)
+}
+
+func TestGetBeaconBlock_BlindedFuluValid(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	proto := testhelpers.GenerateProtoBlindedFuluBeaconBlock()
+	block := testhelpers.GenerateJsonBlindedFuluBeaconBlock()
+	bytes, err := json.Marshal(block)
+	require.NoError(t, err)
+
+	const slot = primitives.Slot(1)
+	randaoReveal := []byte{2}
+	graffiti := []byte{3}
+
+	ctx := t.Context()
+
+	b, err := json.Marshal(structs.ProduceBlockV3Response{
+		Version:                 "fulu",
+		ExecutionPayloadBlinded: true,
+		Data:                    bytes,
+	})
+	require.NoError(t, err)
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
+		gomock.Any(),
+		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
+	).Return(
+		b,
+		http.Header{"Content-Type": []string{"application/json"}},
+		nil,
+	).Times(1)
+
+	validatorClient := &beaconApiValidatorClient{handler: handler}
+	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
+	require.NoError(t, err)
+
+	expectedBeaconBlock := &ethpb.GenericBeaconBlock{
+		Block: &ethpb.GenericBeaconBlock_BlindedFulu{
+			BlindedFulu: proto,
+		},
+		IsBlinded: true,
+	}
+
+	assert.DeepEqual(t, expectedBeaconBlock, beaconBlock)
+}
+
 func TestGetBeaconBlock_DenebValid(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
@@ -994,8 +1188,8 @@ func TestGetBeaconBlock_DenebValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -1004,7 +1198,7 @@ func TestGetBeaconBlock_DenebValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -1039,8 +1233,8 @@ func TestGetBeaconBlock_BlindedDenebValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -1049,7 +1243,7 @@ func TestGetBeaconBlock_BlindedDenebValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -1084,8 +1278,8 @@ func TestGetBeaconBlock_ElectraValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -1094,7 +1288,7 @@ func TestGetBeaconBlock_ElectraValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 
@@ -1129,8 +1323,8 @@ func TestGetBeaconBlock_BlindedElectraValid(t *testing.T) {
 		Data:                    bytes,
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().GetSSZ(
+	handler := mock.NewMockHandler(ctrl)
+	handler.EXPECT().GetSSZ(
 		gomock.Any(),
 		fmt.Sprintf("/eth/v3/validator/blocks/%d?graffiti=%s&randao_reveal=%s", slot, hexutil.Encode(graffiti), hexutil.Encode(randaoReveal)),
 	).Return(
@@ -1139,7 +1333,7 @@ func TestGetBeaconBlock_BlindedElectraValid(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	beaconBlock, err := validatorClient.beaconBlock(ctx, slot, randaoReveal, graffiti)
 	require.NoError(t, err)
 

validator/client/beacon-api/index_test.go

@@ -41,9 +41,9 @@ func TestIndex_Nominal(t *testing.T) {
 	ctx := t.Context()
 
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -68,7 +68,7 @@ func TestIndex_Nominal(t *testing.T) {
 
 	validatorClient := beaconApiValidatorClient{
 		stateValidatorsProvider: beaconApiStateValidatorsProvider{
-			jsonRestHandler: jsonRestHandler,
+			handler: handler,
 		},
 	}
 
@@ -91,9 +91,9 @@ func TestIndex_UnexistingValidator(t *testing.T) {
 	ctx := t.Context()
 
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -110,7 +110,7 @@ func TestIndex_UnexistingValidator(t *testing.T) {
 
 	validatorClient := beaconApiValidatorClient{
 		stateValidatorsProvider: beaconApiStateValidatorsProvider{
-			jsonRestHandler: jsonRestHandler,
+			handler: handler,
 		},
 	}
 
@@ -133,9 +133,9 @@ func TestIndex_BadIndexError(t *testing.T) {
 	ctx := t.Context()
 
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -160,7 +160,7 @@ func TestIndex_BadIndexError(t *testing.T) {
 
 	validatorClient := beaconApiValidatorClient{
 		stateValidatorsProvider: beaconApiStateValidatorsProvider{
-			jsonRestHandler: jsonRestHandler,
+			handler: handler,
 		},
 	}
 
@@ -182,9 +182,9 @@ func TestIndex_JsonResponseError(t *testing.T) {
 	ctx := t.Context()
 
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -207,7 +207,7 @@ func TestIndex_JsonResponseError(t *testing.T) {
 		queryParams.Add("status", st)
 	}
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		apiutil.BuildURL("/eth/v1/beacon/states/head/validators", queryParams),
 		&stateValidatorsResponseJson,
@@ -217,7 +217,7 @@ func TestIndex_JsonResponseError(t *testing.T) {
 
 	validatorClient := beaconApiValidatorClient{
 		stateValidatorsProvider: beaconApiStateValidatorsProvider{
-			jsonRestHandler: jsonRestHandler,
+			handler: handler,
 		},
 	}
 

validator/client/beacon-api/mock/json_rest_handler_mock.go

@@ -1,9 +1,9 @@
 // Code generated by MockGen. DO NOT EDIT.
-// Source: validator/client/beacon-api/rest_handler_client.go
+// Source: api/rest/rest_handler.go
 //
 // Generated by this command:
 //
-//	mockgen -package=mock -source=validator/client/beacon-api/rest_handler_client.go -destination=validator/client/beacon-api/mock/json_rest_handler_mock.go RestHandler
+//	mockgen -package=mock -source=api/rest/rest_handler.go -destination=validator/client/beacon-api/mock/json_rest_handler_mock.go Handler
 //
 
 // Package mock is a generated GoMock package.
@@ -19,36 +19,39 @@ import (
 )
 
 // Backward compatibility aliases for the renamed mock type.
-type MockJsonRestHandler = MockRestHandler
-type MockJsonRestHandlerMockRecorder = MockRestHandlerMockRecorder
+type MockJsonRestHandler = MockHandler
+type MockJsonRestHandlerMockRecorder = MockHandlerMockRecorder
+type MockRestHandler = MockHandler
+type MockRestHandlerMockRecorder = MockHandlerMockRecorder
 
-var NewMockJsonRestHandler = NewMockRestHandler
+var NewMockJsonRestHandler = NewMockHandler
+var NewMockRestHandler = NewMockHandler
 
-// MockRestHandler is a mock of RestHandler interface.
-type MockRestHandler struct {
+// MockHandler is a mock of Handler interface.
+type MockHandler struct {
 	ctrl     *gomock.Controller
-	recorder *MockRestHandlerMockRecorder
+	recorder *MockHandlerMockRecorder
 }
 
-// MockRestHandlerMockRecorder is the mock recorder for MockRestHandler.
-type MockRestHandlerMockRecorder struct {
-	mock *MockRestHandler
+// MockHandlerMockRecorder is the mock recorder for MockHandler.
+type MockHandlerMockRecorder struct {
+	mock *MockHandler
 }
 
-// NewMockRestHandler creates a new mock instance.
-func NewMockRestHandler(ctrl *gomock.Controller) *MockRestHandler {
-	mock := &MockRestHandler{ctrl: ctrl}
-	mock.recorder = &MockRestHandlerMockRecorder{mock}
+// NewMockHandler creates a new mock instance.
+func NewMockHandler(ctrl *gomock.Controller) *MockHandler {
+	mock := &MockHandler{ctrl: ctrl}
+	mock.recorder = &MockHandlerMockRecorder{mock}
 	return mock
 }
 
 // EXPECT returns an object that allows the caller to indicate expected use.
-func (m *MockRestHandler) EXPECT() *MockRestHandlerMockRecorder {
+func (m *MockHandler) EXPECT() *MockHandlerMockRecorder {
 	return m.recorder
 }
 
 // Get mocks base method.
-func (m *MockRestHandler) Get(ctx context.Context, endpoint string, resp any) error {
+func (m *MockHandler) Get(ctx context.Context, endpoint string, resp any) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Get", ctx, endpoint, resp)
 	ret0, _ := ret[0].(error)
@@ -56,13 +59,13 @@ func (m *MockRestHandler) Get(ctx context.Context, endpoint string, resp any) er
 }
 
 // Get indicates an expected call of Get.
-func (mr *MockRestHandlerMockRecorder) Get(ctx, endpoint, resp any) *gomock.Call {
+func (mr *MockHandlerMockRecorder) Get(ctx, endpoint, resp any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Get", reflect.TypeOf((*MockRestHandler)(nil).Get), ctx, endpoint, resp)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Get", reflect.TypeOf((*MockHandler)(nil).Get), ctx, endpoint, resp)
 }
 
 // GetSSZ mocks base method.
-func (m *MockRestHandler) GetSSZ(ctx context.Context, endpoint string) ([]byte, http.Header, error) {
+func (m *MockHandler) GetSSZ(ctx context.Context, endpoint string) ([]byte, http.Header, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "GetSSZ", ctx, endpoint)
 	ret0, _ := ret[0].([]byte)
@@ -72,13 +75,13 @@ func (m *MockRestHandler) GetSSZ(ctx context.Context, endpoint string) ([]byte,
 }
 
 // GetSSZ indicates an expected call of GetSSZ.
-func (mr *MockRestHandlerMockRecorder) GetSSZ(ctx, endpoint any) *gomock.Call {
+func (mr *MockHandlerMockRecorder) GetSSZ(ctx, endpoint any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetSSZ", reflect.TypeOf((*MockRestHandler)(nil).GetSSZ), ctx, endpoint)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetSSZ", reflect.TypeOf((*MockHandler)(nil).GetSSZ), ctx, endpoint)
 }
 
 // GetStatusCode mocks base method.
-func (m *MockRestHandler) GetStatusCode(ctx context.Context, endpoint string) (int, error) {
+func (m *MockHandler) GetStatusCode(ctx context.Context, endpoint string) (int, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "GetStatusCode", ctx, endpoint)
 	ret0, _ := ret[0].(int)
@@ -87,13 +90,13 @@ func (m *MockRestHandler) GetStatusCode(ctx context.Context, endpoint string) (i
 }
 
 // GetStatusCode indicates an expected call of GetStatusCode.
-func (mr *MockRestHandlerMockRecorder) GetStatusCode(ctx, endpoint any) *gomock.Call {
+func (mr *MockHandlerMockRecorder) GetStatusCode(ctx, endpoint any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetStatusCode", reflect.TypeOf((*MockRestHandler)(nil).GetStatusCode), ctx, endpoint)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "GetStatusCode", reflect.TypeOf((*MockHandler)(nil).GetStatusCode), ctx, endpoint)
 }
 
 // Host mocks base method.
-func (m *MockRestHandler) Host() string {
+func (m *MockHandler) Host() string {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Host")
 	ret0, _ := ret[0].(string)
@@ -101,27 +104,13 @@ func (m *MockRestHandler) Host() string {
 }
 
 // Host indicates an expected call of Host.
-func (mr *MockRestHandlerMockRecorder) Host() *gomock.Call {
+func (mr *MockHandlerMockRecorder) Host() *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Host", reflect.TypeOf((*MockRestHandler)(nil).Host))
-}
-
-// HttpClient mocks base method.
-func (m *MockRestHandler) HttpClient() *http.Client {
-	m.ctrl.T.Helper()
-	ret := m.ctrl.Call(m, "HttpClient")
-	ret0, _ := ret[0].(*http.Client)
-	return ret0
-}
-
-// HttpClient indicates an expected call of HttpClient.
-func (mr *MockRestHandlerMockRecorder) HttpClient() *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "HttpClient", reflect.TypeOf((*MockRestHandler)(nil).HttpClient))
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Host", reflect.TypeOf((*MockHandler)(nil).Host))
 }
 
 // Post mocks base method.
-func (m *MockRestHandler) Post(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer, resp any) error {
+func (m *MockHandler) Post(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer, resp any) error {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "Post", ctx, endpoint, headers, data, resp)
 	ret0, _ := ret[0].(error)
@@ -129,13 +118,13 @@ func (m *MockRestHandler) Post(ctx context.Context, endpoint string, headers map
 }
 
 // Post indicates an expected call of Post.
-func (mr *MockRestHandlerMockRecorder) Post(ctx, endpoint, headers, data, resp any) *gomock.Call {
+func (mr *MockHandlerMockRecorder) Post(ctx, endpoint, headers, data, resp any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Post", reflect.TypeOf((*MockRestHandler)(nil).Post), ctx, endpoint, headers, data, resp)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "Post", reflect.TypeOf((*MockHandler)(nil).Post), ctx, endpoint, headers, data, resp)
 }
 
 // PostSSZ mocks base method.
-func (m *MockRestHandler) PostSSZ(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer) ([]byte, http.Header, error) {
+func (m *MockHandler) PostSSZ(ctx context.Context, endpoint string, headers map[string]string, data *bytes.Buffer) ([]byte, http.Header, error) {
 	m.ctrl.T.Helper()
 	ret := m.ctrl.Call(m, "PostSSZ", ctx, endpoint, headers, data)
 	ret0, _ := ret[0].([]byte)
@@ -145,19 +134,7 @@ func (m *MockRestHandler) PostSSZ(ctx context.Context, endpoint string, headers
 }
 
 // PostSSZ indicates an expected call of PostSSZ.
-func (mr *MockRestHandlerMockRecorder) PostSSZ(ctx, endpoint, headers, data any) *gomock.Call {
+func (mr *MockHandlerMockRecorder) PostSSZ(ctx, endpoint, headers, data any) *gomock.Call {
 	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "PostSSZ", reflect.TypeOf((*MockRestHandler)(nil).PostSSZ), ctx, endpoint, headers, data)
-}
-
-// SwitchHost mocks base method.
-func (m *MockRestHandler) SwitchHost(host string) {
-	m.ctrl.T.Helper()
-	m.ctrl.Call(m, "SwitchHost", host)
-}
-
-// SwitchHost indicates an expected call of SwitchHost.
-func (mr *MockRestHandlerMockRecorder) SwitchHost(host any) *gomock.Call {
-	mr.mock.ctrl.T.Helper()
-	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "SwitchHost", reflect.TypeOf((*MockRestHandler)(nil).SwitchHost), host)
+	return mr.mock.ctrl.RecordCallWithMethodType(mr.mock, "PostSSZ", reflect.TypeOf((*MockHandler)(nil).PostSSZ), ctx, endpoint, headers, data)
 }

validator/client/beacon-api/prepare_beacon_proposer.go

@@ -26,5 +26,5 @@ func (c *beaconApiValidatorClient) prepareBeaconProposer(ctx context.Context, re
 		return errors.Wrap(err, "failed to marshal recipients")
 	}
 
-	return c.jsonRestHandler.Post(ctx, "/eth/v1/validator/prepare_beacon_proposer", nil, bytes.NewBuffer(marshalledJsonRecipients), nil)
+	return c.handler.Post(ctx, "/eth/v1/validator/prepare_beacon_proposer", nil, bytes.NewBuffer(marshalledJsonRecipients), nil)
 }

validator/client/beacon-api/prepare_beacon_proposer_test.go

@@ -45,8 +45,8 @@ func TestPrepareBeaconProposer_Valid(t *testing.T) {
 	marshalledJsonRecipients, err := json.Marshal(jsonRecipients)
 	require.NoError(t, err)
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		prepareBeaconProposerTestEndpoint,
 		nil,
@@ -78,7 +78,7 @@ func TestPrepareBeaconProposer_Valid(t *testing.T) {
 		},
 	}
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	err = validatorClient.prepareBeaconProposer(ctx, protoRecipients)
 	require.NoError(t, err)
 }
@@ -89,8 +89,8 @@ func TestPrepareBeaconProposer_BadRequest(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		prepareBeaconProposerTestEndpoint,
 		nil,
@@ -100,7 +100,7 @@ func TestPrepareBeaconProposer_BadRequest(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	err := validatorClient.prepareBeaconProposer(ctx, nil)
 	assert.ErrorContains(t, "foo error", err)
 }

validator/client/beacon-api/propose_attestation.go

@@ -22,7 +22,7 @@ func (c *beaconApiValidatorClient) proposeAttestation(ctx context.Context, attes
 	}
 
 	headers := map[string]string{"Eth-Consensus-Version": version.String(attestation.Version())}
-	err = c.jsonRestHandler.Post(
+	err = c.handler.Post(
 		ctx,
 		"/eth/v2/beacon/pool/attestations",
 		headers,
@@ -51,7 +51,7 @@ func (c *beaconApiValidatorClient) proposeAttestationElectra(ctx context.Context
 	}
 	consensusVersion := version.String(slots.ToForkVersion(attestation.Data.Slot))
 	headers := map[string]string{"Eth-Consensus-Version": consensusVersion}
-	if err = c.jsonRestHandler.Post(
+	if err = c.handler.Post(
 		ctx,
 		"/eth/v2/beacon/pool/attestations",
 		headers,

validator/client/beacon-api/propose_attestation_test.go

@@ -107,7 +107,7 @@ func TestProposeAttestation(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			ctrl := gomock.NewController(t)
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			var marshalledAttestations []byte
 			if helpers.ValidateNilAttestation(test.attestation) == nil {
@@ -119,7 +119,7 @@ func TestProposeAttestation(t *testing.T) {
 			ctx := t.Context()
 
 			headers := map[string]string{"Eth-Consensus-Version": version.String(test.attestation.Version())}
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				"/eth/v2/beacon/pool/attestations",
 				headers,
@@ -129,7 +129,7 @@ func TestProposeAttestation(t *testing.T) {
 				test.endpointError,
 			).Times(test.endpointCall)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			proposeResponse, err := validatorClient.proposeAttestation(ctx, test.attestation)
 			if test.expectedErrorMessage != "" {
 				require.ErrorContains(t, test.expectedErrorMessage, err)
@@ -254,7 +254,7 @@ func TestProposeAttestationElectra(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			ctrl := gomock.NewController(t)
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			var marshalledAttestations []byte
 			if helpers.ValidateNilAttestation(test.attestation) == nil {
@@ -268,7 +268,7 @@ func TestProposeAttestationElectra(t *testing.T) {
 			if test.expectedConsensusVersion != "" {
 				headerMatcher = gomock.Eq(map[string]string{"Eth-Consensus-Version": test.expectedConsensusVersion})
 			}
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				"/eth/v2/beacon/pool/attestations",
 				headerMatcher,
@@ -278,7 +278,7 @@ func TestProposeAttestationElectra(t *testing.T) {
 				test.endpointError,
 			).Times(test.endpointCall)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			proposeResponse, err := validatorClient.proposeAttestationElectra(ctx, test.attestation)
 			if test.expectedErrorMessage != "" {
 				require.ErrorContains(t, test.expectedErrorMessage, err)

validator/client/beacon-api/propose_beacon_block.go

@@ -7,6 +7,7 @@ import (
 	"net/http"
 
 	"github.com/OffchainLabs/prysm/v7/api/server/structs"
+	"github.com/OffchainLabs/prysm/v7/encoding/ssz"
 	"github.com/OffchainLabs/prysm/v7/network/httputil"
 	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
 	"github.com/pkg/errors"
@@ -21,34 +22,128 @@ type blockProcessingResult struct {
 	marshalJSON func() ([]byte, error)
 }
 
+type sszMarshaler interface {
+	MarshalSSZ() ([]byte, error)
+}
+
+func buildBlockResult(
+	versionName string,
+	blinded bool,
+	sszObj sszMarshaler,
+	rootObj ssz.Hashable,
+	jsonFn func() ([]byte, error),
+) (*blockProcessingResult, error) {
+	beaconBlockRoot, err := rootObj.HashTreeRoot()
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to compute block root for %s beacon block", versionName)
+	}
+
+	marshaledSSZ, err := sszObj.MarshalSSZ()
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed to serialize %s beacon block", versionName)
+	}
+
+	return &blockProcessingResult{
+		consensusVersion: versionName,
+		blinded:          blinded,
+		beaconBlockRoot:  beaconBlockRoot,
+		marshalledSSZ:    marshaledSSZ,
+		marshalJSON:      jsonFn,
+	}, nil
+}
+
 func (c *beaconApiValidatorClient) proposeBeaconBlock(ctx context.Context, in *ethpb.GenericSignedBeaconBlock) (*ethpb.ProposeResponse, error) {
 	var res *blockProcessingResult
 	var err error
 	switch blockType := in.Block.(type) {
 	case *ethpb.GenericSignedBeaconBlock_Phase0:
-		res, err = handlePhase0Block(blockType)
+		res, err = buildBlockResult("phase0", false, blockType.Phase0, blockType.Phase0.Block, func() ([]byte, error) {
+			return json.Marshal(structs.SignedBeaconBlockPhase0FromConsensus(blockType.Phase0))
+		})
 	case *ethpb.GenericSignedBeaconBlock_Altair:
-		res, err = handleAltairBlock(blockType)
+		res, err = buildBlockResult("altair", false, blockType.Altair, blockType.Altair.Block, func() ([]byte, error) {
+			return json.Marshal(structs.SignedBeaconBlockAltairFromConsensus(blockType.Altair))
+		})
 	case *ethpb.GenericSignedBeaconBlock_Bellatrix:
-		res, err = handleBellatrixBlock(blockType)
+		res, err = buildBlockResult("bellatrix", false, blockType.Bellatrix, blockType.Bellatrix.Block, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBeaconBlockBellatrixFromConsensus(blockType.Bellatrix)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert bellatrix beacon block")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_BlindedBellatrix:
-		res, err = handleBlindedBellatrixBlock(blockType)
+		res, err = buildBlockResult("bellatrix", true, blockType.BlindedBellatrix, blockType.BlindedBellatrix.Block, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBlindedBeaconBlockBellatrixFromConsensus(blockType.BlindedBellatrix)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert blinded bellatrix beacon block")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_Capella:
-		res, err = handleCapellaBlock(blockType)
+		res, err = buildBlockResult("capella", false, blockType.Capella, blockType.Capella.Block, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBeaconBlockCapellaFromConsensus(blockType.Capella)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert capella beacon block")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_BlindedCapella:
-		res, err = handleBlindedCapellaBlock(blockType)
+		res, err = buildBlockResult("capella", true, blockType.BlindedCapella, blockType.BlindedCapella.Block, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBlindedBeaconBlockCapellaFromConsensus(blockType.BlindedCapella)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert blinded capella beacon block")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_Deneb:
-		res, err = handleDenebBlockContents(blockType)
+		res, err = buildBlockResult("deneb", false, blockType.Deneb, blockType.Deneb.Block, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBeaconBlockContentsDenebFromConsensus(blockType.Deneb)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert deneb beacon block contents")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_BlindedDeneb:
-		res, err = handleBlindedDenebBlock(blockType)
+		res, err = buildBlockResult("deneb", true, blockType.BlindedDeneb, blockType.BlindedDeneb, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBlindedBeaconBlockDenebFromConsensus(blockType.BlindedDeneb)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert deneb blinded beacon block")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_Electra:
-		res, err = handleElectraBlockContents(blockType)
+		res, err = buildBlockResult("electra", false, blockType.Electra, blockType.Electra.Block, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBeaconBlockContentsElectraFromConsensus(blockType.Electra)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert electra beacon block contents")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_BlindedElectra:
-		res, err = handleBlindedElectraBlock(blockType)
+		res, err = buildBlockResult("electra", true, blockType.BlindedElectra, blockType.BlindedElectra, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBlindedBeaconBlockElectraFromConsensus(blockType.BlindedElectra)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert electra blinded beacon block")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_Fulu:
-		res, err = handleFuluBlockContents(blockType)
+		res, err = buildBlockResult("fulu", false, blockType.Fulu, blockType.Fulu.Block, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBeaconBlockContentsFuluFromConsensus(blockType.Fulu)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert fulu beacon block contents")
+			}
+			return json.Marshal(signedBlock)
+		})
 	case *ethpb.GenericSignedBeaconBlock_BlindedFulu:
-		res, err = handleBlindedFuluBlock(blockType)
+		res, err = buildBlockResult("fulu", true, blockType.BlindedFulu, blockType.BlindedFulu, func() ([]byte, error) {
+			signedBlock, err := structs.SignedBlindedBeaconBlockFuluFromConsensus(blockType.BlindedFulu)
+			if err != nil {
+				return nil, errors.Wrap(err, "failed to convert fulu blinded beacon block")
+			}
+			return json.Marshal(signedBlock)
+		})
 	default:
 		return nil, errors.Errorf("unsupported block type %T", in.Block)
 	}
@@ -67,7 +162,7 @@ func (c *beaconApiValidatorClient) proposeBeaconBlock(ctx context.Context, in *e
 
 	// Try PostSSZ first with SSZ data
 	if res.marshalledSSZ != nil {
-		_, _, err = c.jsonRestHandler.PostSSZ(ctx, endpoint, headers, bytes.NewBuffer(res.marshalledSSZ))
+		_, _, err = c.handler.PostSSZ(ctx, endpoint, headers, bytes.NewBuffer(res.marshalledSSZ))
 		if err != nil {
 			errJson := &httputil.DefaultJsonError{}
 			// If PostSSZ fails with 406 (Not Acceptable), fall back to JSON
@@ -81,7 +176,7 @@ func (c *beaconApiValidatorClient) proposeBeaconBlock(ctx context.Context, in *e
 					return nil, errors.Wrap(jsonErr, "failed to marshal JSON")
 				}
 				// Reset headers for JSON
-				err = c.jsonRestHandler.Post(ctx, endpoint, headers, bytes.NewBuffer(jsonData), nil)
+				err = c.handler.Post(ctx, endpoint, headers, bytes.NewBuffer(jsonData), nil)
 				// If JSON also fails, return that error
 				if err != nil {
 					return nil, errors.Wrap(err, "failed to submit block via JSON fallback")
@@ -100,7 +195,7 @@ func (c *beaconApiValidatorClient) proposeBeaconBlock(ctx context.Context, in *e
 			return nil, errors.Wrap(jsonErr, "failed to marshal JSON")
 		}
 		// Reset headers for JSON
-		err = c.jsonRestHandler.Post(ctx, endpoint, headers, bytes.NewBuffer(jsonData), nil)
+		err = c.handler.Post(ctx, endpoint, headers, bytes.NewBuffer(jsonData), nil)
 		errJson := &httputil.DefaultJsonError{}
 		if err != nil {
 			if !errors.As(err, &errJson) {
@@ -116,357 +211,3 @@ func (c *beaconApiValidatorClient) proposeBeaconBlock(ctx context.Context, in *e
 
 	return &ethpb.ProposeResponse{BlockRoot: res.beaconBlockRoot[:]}, nil
 }
-
-func handlePhase0Block(block *ethpb.GenericSignedBeaconBlock_Phase0) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "phase0"
-	res.blinded = false
-
-	beaconBlockRoot, err := block.Phase0.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for phase0 beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.Phase0.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize block for phase0 beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock := structs.SignedBeaconBlockPhase0FromConsensus(block.Phase0)
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleAltairBlock(block *ethpb.GenericSignedBeaconBlock_Altair) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "altair"
-	res.blinded = false
-
-	beaconBlockRoot, err := block.Altair.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for altair beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.Altair.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize block for altair beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock := structs.SignedBeaconBlockAltairFromConsensus(block.Altair)
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleBellatrixBlock(block *ethpb.GenericSignedBeaconBlock_Bellatrix) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "bellatrix"
-	res.blinded = false
-
-	beaconBlockRoot, err := block.Bellatrix.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for bellatrix beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.Bellatrix.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize block for bellatrix beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBeaconBlockBellatrixFromConsensus(block.Bellatrix)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert bellatrix beacon block")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleBlindedBellatrixBlock(block *ethpb.GenericSignedBeaconBlock_BlindedBellatrix) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "bellatrix"
-	res.blinded = true
-
-	beaconBlockRoot, err := block.BlindedBellatrix.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for bellatrix beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.BlindedBellatrix.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize block for bellatrix beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBlindedBeaconBlockBellatrixFromConsensus(block.BlindedBellatrix)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert blinded bellatrix beacon block")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleCapellaBlock(block *ethpb.GenericSignedBeaconBlock_Capella) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "capella"
-	res.blinded = false
-
-	beaconBlockRoot, err := block.Capella.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for capella beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.Capella.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize capella beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBeaconBlockCapellaFromConsensus(block.Capella)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert capella beacon block")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleBlindedCapellaBlock(block *ethpb.GenericSignedBeaconBlock_BlindedCapella) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "capella"
-	res.blinded = true
-
-	beaconBlockRoot, err := block.BlindedCapella.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for blinded capella beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.BlindedCapella.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize blinded capella beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBlindedBeaconBlockCapellaFromConsensus(block.BlindedCapella)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert blinded capella beacon block")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleDenebBlockContents(block *ethpb.GenericSignedBeaconBlock_Deneb) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "deneb"
-	res.blinded = false
-
-	beaconBlockRoot, err := block.Deneb.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for deneb beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.Deneb.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize deneb beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBeaconBlockContentsDenebFromConsensus(block.Deneb)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert deneb beacon block contents")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleBlindedDenebBlock(block *ethpb.GenericSignedBeaconBlock_BlindedDeneb) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "deneb"
-	res.blinded = true
-
-	beaconBlockRoot, err := block.BlindedDeneb.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for deneb blinded beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.BlindedDeneb.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize blinded deneb  beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBlindedBeaconBlockDenebFromConsensus(block.BlindedDeneb)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert deneb blinded beacon block")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleElectraBlockContents(block *ethpb.GenericSignedBeaconBlock_Electra) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "electra"
-	res.blinded = false
-
-	beaconBlockRoot, err := block.Electra.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for electra beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.Electra.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize electra beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBeaconBlockContentsElectraFromConsensus(block.Electra)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert electra beacon block contents")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleBlindedElectraBlock(block *ethpb.GenericSignedBeaconBlock_BlindedElectra) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "electra"
-	res.blinded = true
-
-	beaconBlockRoot, err := block.BlindedElectra.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for electra blinded beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.BlindedElectra.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize blinded electra beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBlindedBeaconBlockElectraFromConsensus(block.BlindedElectra)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert electra blinded beacon block")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleFuluBlockContents(block *ethpb.GenericSignedBeaconBlock_Fulu) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "fulu"
-	res.blinded = false
-
-	beaconBlockRoot, err := block.Fulu.Block.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for fulu beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.Fulu.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize fulu beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBeaconBlockContentsFuluFromConsensus(block.Fulu)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert fulu beacon block contents")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}
-
-func handleBlindedFuluBlock(block *ethpb.GenericSignedBeaconBlock_BlindedFulu) (*blockProcessingResult, error) {
-	var res blockProcessingResult
-	res.consensusVersion = "fulu"
-	res.blinded = true
-
-	beaconBlockRoot, err := block.BlindedFulu.HashTreeRoot()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to compute block root for fulu blinded beacon block")
-	}
-	res.beaconBlockRoot = beaconBlockRoot
-
-	// Marshal SSZ
-	ssz, err := block.BlindedFulu.MarshalSSZ()
-	if err != nil {
-		return nil, errors.Wrap(err, "failed to serialize blinded fulu beacon block")
-	}
-	res.marshalledSSZ = ssz
-
-	// Set up JSON marshalling function for fallback
-	res.marshalJSON = func() ([]byte, error) {
-		signedBlock, err := structs.SignedBlindedBeaconBlockFuluFromConsensus(block.BlindedFulu)
-		if err != nil {
-			return nil, errors.Wrap(err, "failed to convert fulu blinded beacon block")
-		}
-		return json.Marshal(signedBlock)
-	}
-
-	return &res, nil
-}

validator/client/beacon-api/propose_beacon_block_test.go

@@ -103,13 +103,13 @@ func TestProposeBeaconBlock_SSZ_Error(t *testing.T) {
 				defer ctrl.Finish()
 
 				ctx := t.Context()
-				jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+				handler := mock.NewMockJsonRestHandler(ctrl)
 
 				// Expect PostSSZ to be called first with SSZ data
 				headers := map[string]string{
 					"Eth-Consensus-Version": testCase.consensusVersion,
 				}
-				jsonRestHandler.EXPECT().PostSSZ(
+				handler.EXPECT().PostSSZ(
 					gomock.Any(),
 					testCase.endpoint,
 					headers,
@@ -120,7 +120,7 @@ func TestProposeBeaconBlock_SSZ_Error(t *testing.T) {
 
 				// No JSON fallback expected for non-406 errors
 
-				validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+				validatorClient := &beaconApiValidatorClient{handler: handler}
 				_, err := validatorClient.proposeBeaconBlock(ctx, testCase.block)
 				assert.ErrorContains(t, testSuite.expectedErrorMessage, err)
 			})
@@ -165,13 +165,13 @@ func TestProposeBeaconBlock_SSZSuccess_NoFallback(t *testing.T) {
 			defer ctrl.Finish()
 
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			// Expect PostSSZ to be called and succeed
 			headers := map[string]string{
 				"Eth-Consensus-Version": testCase.consensusVersion,
 			}
-			jsonRestHandler.EXPECT().PostSSZ(
+			handler.EXPECT().PostSSZ(
 				gomock.Any(),
 				testCase.endpoint,
 				headers,
@@ -181,7 +181,7 @@ func TestProposeBeaconBlock_SSZSuccess_NoFallback(t *testing.T) {
 			).Times(1)
 
 			// Post should NOT be called when PostSSZ succeeds
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				gomock.Any(),
 				gomock.Any(),
@@ -189,7 +189,7 @@ func TestProposeBeaconBlock_SSZSuccess_NoFallback(t *testing.T) {
 				gomock.Any(),
 			).Times(0)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			_, err := validatorClient.proposeBeaconBlock(ctx, testCase.block)
 			assert.NoError(t, err)
 		})
@@ -200,7 +200,7 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 	t.Run("deneb", func(t *testing.T) {
 		ctrl := gomock.NewController(t)
 		defer ctrl.Finish()
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+		handler := mock.NewMockJsonRestHandler(ctrl)
 
 		var blockContents structs.SignedBeaconBlockContentsDeneb
 		err := json.Unmarshal([]byte(rpctesting.DenebBlockContents), &blockContents)
@@ -211,14 +211,14 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 		denebBytes, err := genericSignedBlock.GetDeneb().MarshalSSZ()
 		require.NoError(t, err)
 
-		jsonRestHandler.EXPECT().PostSSZ(
+		handler.EXPECT().PostSSZ(
 			gomock.Any(),
 			"/eth/v2/beacon/blocks",
 			gomock.Any(),
 			bytes.NewBuffer(denebBytes),
 		)
 
-		validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+		validatorClient := &beaconApiValidatorClient{handler: handler}
 		proposeResponse, err := validatorClient.proposeBeaconBlock(t.Context(), genericSignedBlock)
 		assert.NoError(t, err)
 		require.NotNil(t, proposeResponse)
@@ -231,7 +231,7 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 	t.Run("blinded_deneb", func(t *testing.T) {
 		ctrl := gomock.NewController(t)
 		defer ctrl.Finish()
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+		handler := mock.NewMockJsonRestHandler(ctrl)
 
 		var blindedBlock structs.SignedBlindedBeaconBlockDeneb
 		err := json.Unmarshal([]byte(rpctesting.BlindedDenebBlock), &blindedBlock)
@@ -242,14 +242,14 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 		blindedDenebBytes, err := genericSignedBlock.GetBlindedDeneb().MarshalSSZ()
 		require.NoError(t, err)
 
-		jsonRestHandler.EXPECT().PostSSZ(
+		handler.EXPECT().PostSSZ(
 			gomock.Any(),
 			"/eth/v2/beacon/blinded_blocks",
 			gomock.Any(),
 			bytes.NewBuffer(blindedDenebBytes),
 		)
 
-		validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+		validatorClient := &beaconApiValidatorClient{handler: handler}
 		proposeResponse, err := validatorClient.proposeBeaconBlock(t.Context(), genericSignedBlock)
 		assert.NoError(t, err)
 		require.NotNil(t, proposeResponse)
@@ -262,7 +262,7 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 	t.Run("electra", func(t *testing.T) {
 		ctrl := gomock.NewController(t)
 		defer ctrl.Finish()
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+		handler := mock.NewMockJsonRestHandler(ctrl)
 
 		var blockContents structs.SignedBeaconBlockContentsElectra
 		err := json.Unmarshal([]byte(rpctesting.ElectraBlockContents), &blockContents)
@@ -273,14 +273,14 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 		electraBytes, err := genericSignedBlock.GetElectra().MarshalSSZ()
 		require.NoError(t, err)
 
-		jsonRestHandler.EXPECT().PostSSZ(
+		handler.EXPECT().PostSSZ(
 			gomock.Any(),
 			"/eth/v2/beacon/blocks",
 			gomock.Any(),
 			bytes.NewBuffer(electraBytes),
 		)
 
-		validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+		validatorClient := &beaconApiValidatorClient{handler: handler}
 		proposeResponse, err := validatorClient.proposeBeaconBlock(t.Context(), genericSignedBlock)
 		assert.NoError(t, err)
 		require.NotNil(t, proposeResponse)
@@ -293,7 +293,7 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 	t.Run("blinded_electra", func(t *testing.T) {
 		ctrl := gomock.NewController(t)
 		defer ctrl.Finish()
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+		handler := mock.NewMockJsonRestHandler(ctrl)
 
 		var blindedBlock structs.SignedBlindedBeaconBlockElectra
 		err := json.Unmarshal([]byte(rpctesting.BlindedElectraBlock), &blindedBlock)
@@ -304,14 +304,14 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 		blindedElectraBytes, err := genericSignedBlock.GetBlindedElectra().MarshalSSZ()
 		require.NoError(t, err)
 
-		jsonRestHandler.EXPECT().PostSSZ(
+		handler.EXPECT().PostSSZ(
 			gomock.Any(),
 			"/eth/v2/beacon/blinded_blocks",
 			gomock.Any(),
 			bytes.NewBuffer(blindedElectraBytes),
 		)
 
-		validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+		validatorClient := &beaconApiValidatorClient{handler: handler}
 		proposeResponse, err := validatorClient.proposeBeaconBlock(t.Context(), genericSignedBlock)
 		assert.NoError(t, err)
 		require.NotNil(t, proposeResponse)
@@ -324,7 +324,7 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 	t.Run("fulu", func(t *testing.T) {
 		ctrl := gomock.NewController(t)
 		defer ctrl.Finish()
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+		handler := mock.NewMockJsonRestHandler(ctrl)
 
 		var blockContents structs.SignedBeaconBlockContentsFulu
 		err := json.Unmarshal([]byte(rpctesting.FuluBlockContents), &blockContents)
@@ -335,14 +335,14 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 		fuluBytes, err := genericSignedBlock.GetFulu().MarshalSSZ()
 		require.NoError(t, err)
 
-		jsonRestHandler.EXPECT().PostSSZ(
+		handler.EXPECT().PostSSZ(
 			gomock.Any(),
 			"/eth/v2/beacon/blocks",
 			gomock.Any(),
 			bytes.NewBuffer(fuluBytes),
 		)
 
-		validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+		validatorClient := &beaconApiValidatorClient{handler: handler}
 		proposeResponse, err := validatorClient.proposeBeaconBlock(t.Context(), genericSignedBlock)
 		assert.NoError(t, err)
 		require.NotNil(t, proposeResponse)
@@ -355,7 +355,7 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 	t.Run("blinded_fulu", func(t *testing.T) {
 		ctrl := gomock.NewController(t)
 		defer ctrl.Finish()
-		jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+		handler := mock.NewMockJsonRestHandler(ctrl)
 
 		var blindedBlock structs.SignedBlindedBeaconBlockFulu
 		err := json.Unmarshal([]byte(rpctesting.BlindedFuluBlock), &blindedBlock)
@@ -366,14 +366,14 @@ func TestProposeBeaconBlock_NewerTypes_SSZMarshal(t *testing.T) {
 		blindedFuluBytes, err := genericSignedBlock.GetBlindedFulu().MarshalSSZ()
 		require.NoError(t, err)
 
-		jsonRestHandler.EXPECT().PostSSZ(
+		handler.EXPECT().PostSSZ(
 			gomock.Any(),
 			"/eth/v2/beacon/blinded_blocks",
 			gomock.Any(),
 			bytes.NewBuffer(blindedFuluBytes),
 		)
 
-		validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+		validatorClient := &beaconApiValidatorClient{handler: handler}
 		proposeResponse, err := validatorClient.proposeBeaconBlock(t.Context(), genericSignedBlock)
 		assert.NoError(t, err)
 		require.NotNil(t, proposeResponse)
@@ -588,10 +588,10 @@ func TestProposeBeaconBlock_SSZFails_406_FallbackToJSON(t *testing.T) {
 			defer ctrl.Finish()
 
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			// Expect PostSSZ to be called first and fail
-			jsonRestHandler.EXPECT().PostSSZ(
+			handler.EXPECT().PostSSZ(
 				gomock.Any(),
 				testCase.endpoint,
 				gomock.Any(),
@@ -603,7 +603,7 @@ func TestProposeBeaconBlock_SSZFails_406_FallbackToJSON(t *testing.T) {
 				},
 			).Times(1)
 
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				testCase.endpoint,
 				gomock.Any(),
@@ -613,13 +613,49 @@ func TestProposeBeaconBlock_SSZFails_406_FallbackToJSON(t *testing.T) {
 				nil,
 			).Times(1)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			_, err := validatorClient.proposeBeaconBlock(ctx, testCase.block)
 			assert.NoError(t, err)
 		})
 	}
 }
 
+func TestProposeBeaconBlock_SSZFails_406_JSONFallbackFails(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+
+	ctx := t.Context()
+	handler := mock.NewMockHandler(ctrl)
+
+	handler.EXPECT().PostSSZ(
+		gomock.Any(),
+		"/eth/v2/beacon/blocks",
+		gomock.Any(),
+		gomock.Any(),
+	).Return(
+		nil, nil, &httputil.DefaultJsonError{
+			Code:    http.StatusNotAcceptable,
+			Message: "SSZ not supported",
+		},
+	).Times(1)
+
+	handler.EXPECT().Post(
+		gomock.Any(),
+		"/eth/v2/beacon/blocks",
+		gomock.Any(),
+		gomock.Any(),
+		nil,
+	).Return(
+		errors.New("json fallback failed"),
+	).Times(1)
+
+	validatorClient := &beaconApiValidatorClient{handler: handler}
+	_, err := validatorClient.proposeBeaconBlock(ctx, &ethpb.GenericSignedBeaconBlock{
+		Block: generateSignedPhase0Block(),
+	})
+	assert.ErrorContains(t, "failed to submit block via JSON fallback", err)
+}
+
 func TestProposeBeaconBlock_SSZFails_Non406_NoFallback(t *testing.T) {
 	testCases := []struct {
 		name             string
@@ -643,13 +679,13 @@ func TestProposeBeaconBlock_SSZFails_Non406_NoFallback(t *testing.T) {
 			defer ctrl.Finish()
 
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			// Expect PostSSZ to be called first and fail with non-406 error
 			sszHeaders := map[string]string{
 				"Eth-Consensus-Version": testCase.consensusVersion,
 			}
-			jsonRestHandler.EXPECT().PostSSZ(
+			handler.EXPECT().PostSSZ(
 				gomock.Any(),
 				testCase.endpoint,
 				sszHeaders,
@@ -662,7 +698,7 @@ func TestProposeBeaconBlock_SSZFails_Non406_NoFallback(t *testing.T) {
 			).Times(1)
 
 			// Post should NOT be called for non-406 errors
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				gomock.Any(),
 				gomock.Any(),
@@ -670,9 +706,47 @@ func TestProposeBeaconBlock_SSZFails_Non406_NoFallback(t *testing.T) {
 				gomock.Any(),
 			).Times(0)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			_, err := validatorClient.proposeBeaconBlock(ctx, testCase.block)
 			require.ErrorContains(t, "Internal server error", err)
 		})
 	}
 }
+
+type badHashable struct{}
+
+func (badHashable) HashTreeRoot() ([32]byte, error) {
+	return [32]byte{}, errors.New("hash root error")
+}
+
+type badMarshaler struct{}
+
+func (badMarshaler) MarshalSSZ() ([]byte, error) {
+	return nil, errors.New("marshal ssz error")
+}
+
+type okMarshaler struct{}
+
+func (okMarshaler) MarshalSSZ() ([]byte, error) {
+	return []byte{1, 2, 3}, nil
+}
+
+type okHashable struct{}
+
+func (okHashable) HashTreeRoot() ([32]byte, error) {
+	return [32]byte{1}, nil
+}
+
+func TestBuildBlockResult_HashTreeRootError(t *testing.T) {
+	_, err := buildBlockResult("phase0", false, okMarshaler{}, badHashable{}, func() ([]byte, error) {
+		return []byte(`{}`), nil
+	})
+	assert.ErrorContains(t, "failed to compute block root for phase0 beacon block", err)
+}
+
+func TestBuildBlockResult_MarshalSSZError(t *testing.T) {
+	_, err := buildBlockResult("phase0", false, badMarshaler{}, okHashable{}, func() ([]byte, error) {
+		return []byte(`{}`), nil
+	})
+	assert.ErrorContains(t, "failed to serialize phase0 beacon block", err)
+}

validator/client/beacon-api/propose_exit.go

@@ -34,7 +34,7 @@ func (c *beaconApiValidatorClient) proposeExit(ctx context.Context, signedVolunt
 		return nil, errors.Wrap(err, "failed to marshal signed voluntary exit")
 	}
 
-	if err = c.jsonRestHandler.Post(
+	if err = c.handler.Post(
 		ctx,
 		"/eth/v1/beacon/pool/voluntary_exits",
 		nil,

validator/client/beacon-api/propose_exit_test.go

@@ -36,8 +36,8 @@ func TestProposeExit_Valid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		proposeExitTestEndpoint,
 		nil,
@@ -61,7 +61,7 @@ func TestProposeExit_Valid(t *testing.T) {
 	expectedExitRoot, err := protoSignedVoluntaryExit.Exit.HashTreeRoot()
 	require.NoError(t, err)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	exitResponse, err := validatorClient.proposeExit(ctx, protoSignedVoluntaryExit)
 	require.NoError(t, err)
 	assert.DeepEqual(t, expectedExitRoot[:], exitResponse.ExitRoot)
@@ -85,8 +85,8 @@ func TestProposeExit_BadRequest(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		proposeExitTestEndpoint,
 		nil,
@@ -104,7 +104,7 @@ func TestProposeExit_BadRequest(t *testing.T) {
 		Signature: []byte{3},
 	}
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.proposeExit(ctx, protoSignedVoluntaryExit)
 	assert.ErrorContains(t, "foo error", err)
 }

validator/client/beacon-api/prysm_beacon_chain_client.go

@@ -19,16 +19,16 @@ import (
 )
 
 // NewPrysmChainClient returns implementation of iface.PrysmChainClient.
-func NewPrysmChainClient(jsonRestHandler rest.RestHandler, nodeClient iface.NodeClient) iface.PrysmChainClient {
+func NewPrysmChainClient(handler rest.Handler, nodeClient iface.NodeClient) iface.PrysmChainClient {
 	return prysmChainClient{
-		jsonRestHandler: jsonRestHandler,
-		nodeClient:      nodeClient,
+		handler:    handler,
+		nodeClient: nodeClient,
 	}
 }
 
 type prysmChainClient struct {
-	jsonRestHandler rest.RestHandler
-	nodeClient      iface.NodeClient
+	handler    rest.Handler
+	nodeClient iface.NodeClient
 }
 
 func (c prysmChainClient) ValidatorCount(ctx context.Context, stateID string, statuses []validator2.Status) ([]iface.ValidatorCount, error) {
@@ -50,7 +50,7 @@ func (c prysmChainClient) ValidatorCount(ctx context.Context, stateID string, st
 	queryUrl := apiutil.BuildURL(fmt.Sprintf("/eth/v1/beacon/states/%s/validator_count", stateID), queryParams)
 
 	var validatorCountResponse structs.GetValidatorCountResponse
-	if err = c.jsonRestHandler.Get(ctx, queryUrl, &validatorCountResponse); err != nil {
+	if err = c.handler.Get(ctx, queryUrl, &validatorCountResponse); err != nil {
 		return nil, err
 	}
 
@@ -97,7 +97,7 @@ func (c prysmChainClient) ValidatorPerformance(ctx context.Context, in *ethpb.Va
 		return nil, errors.Wrap(err, "failed to marshal request")
 	}
 	resp := &structs.GetValidatorPerformanceResponse{}
-	if err = c.jsonRestHandler.Post(ctx, "/prysm/validators/performance", nil, bytes.NewBuffer(request), resp); err != nil {
+	if err = c.handler.Post(ctx, "/prysm/validators/performance", nil, bytes.NewBuffer(request), resp); err != nil {
 		return nil, err
 	}
 

validator/client/beacon-api/prysm_beacon_chain_client_test.go

@@ -116,11 +116,11 @@ func TestGetValidatorCount(t *testing.T) {
 			defer ctrl.Finish()
 
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			// Expect node version endpoint call.
 			var nodeVersionResponse structs.GetVersionResponse
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v1/node/version",
 				&nodeVersionResponse,
@@ -132,7 +132,7 @@ func TestGetValidatorCount(t *testing.T) {
 			)
 
 			var validatorCountResponse structs.GetValidatorCountResponse
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v1/beacon/states/head/validator_count?status=active",
 				&validatorCountResponse,
@@ -145,8 +145,8 @@ func TestGetValidatorCount(t *testing.T) {
 
 			// Type assertion.
 			var client iface.PrysmChainClient = &prysmChainClient{
-				nodeClient:      &beaconApiNodeClient{jsonRestHandler: jsonRestHandler},
-				jsonRestHandler: jsonRestHandler,
+				nodeClient: &beaconApiNodeClient{handler: handler},
+				handler:    handler,
 			}
 
 			countResponse, err := client.ValidatorCount(ctx, "head", []validator.Status{validator.Active})
@@ -177,10 +177,10 @@ func Test_beaconApiBeaconChainClient_GetValidatorPerformance(t *testing.T) {
 		PublicKeys: [][]byte{publicKeys[0][:], publicKeys[2][:], publicKeys[1][:]},
 	})
 	require.NoError(t, err)
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 	// Expect node version endpoint call.
 	var nodeVersionResponse structs.GetVersionResponse
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/node/version",
 		&nodeVersionResponse,
@@ -196,7 +196,7 @@ func Test_beaconApiBeaconChainClient_GetValidatorPerformance(t *testing.T) {
 	wantResponse := &structs.GetValidatorPerformanceResponse{}
 	want := &ethpb.ValidatorPerformanceResponse{}
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/prysm/validators/performance",
 		nil,
@@ -207,8 +207,8 @@ func Test_beaconApiBeaconChainClient_GetValidatorPerformance(t *testing.T) {
 	)
 
 	var client iface.PrysmChainClient = &prysmChainClient{
-		nodeClient:      &beaconApiNodeClient{jsonRestHandler: jsonRestHandler},
-		jsonRestHandler: jsonRestHandler,
+		nodeClient: &beaconApiNodeClient{handler: handler},
+		handler:    handler,
 	}
 
 	got, err := client.ValidatorPerformance(ctx, &ethpb.ValidatorPerformanceRequest{

validator/client/beacon-api/registration.go

@@ -24,5 +24,5 @@ func (c *beaconApiValidatorClient) submitValidatorRegistrations(ctx context.Cont
 		return errors.Wrap(err, "failed to marshal registration")
 	}
 
-	return c.jsonRestHandler.Post(ctx, endpoint, nil, bytes.NewBuffer(marshalledJsonRegistration), nil)
+	return c.handler.Post(ctx, endpoint, nil, bytes.NewBuffer(marshalledJsonRegistration), nil)
 }

validator/client/beacon-api/registration_test.go

@@ -65,8 +65,8 @@ func TestRegistration_Valid(t *testing.T) {
 	marshalledJsonRegistrations, err := json.Marshal(jsonRegistrations)
 	require.NoError(t, err)
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/validator/register_validator",
 		nil,
@@ -129,7 +129,7 @@ func TestRegistration_Valid(t *testing.T) {
 		},
 	}
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	res, err := validatorClient.SubmitValidatorRegistrations(t.Context(), &protoRegistrations)
 
 	assert.DeepEqual(t, new(empty.Empty), res)
@@ -140,8 +140,8 @@ func TestRegistration_BadRequest(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/validator/register_validator",
 		nil,
@@ -151,7 +151,7 @@ func TestRegistration_BadRequest(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.SubmitValidatorRegistrations(t.Context(), &ethpb.SignedValidatorRegistrationsV1{})
 	assert.ErrorContains(t, "foo error", err)
 }

validator/client/beacon-api/rest_handler_client_test.go

@@ -44,9 +44,9 @@ func TestGet(t *testing.T) {
 	server := httptest.NewServer(mux)
 	defer server.Close()
 
-	jsonRestHandler := rest.NewRestHandler(http.Client{Timeout: time.Second * 5}, server.URL)
+	handler := rest.NewHandler(http.Client{Timeout: time.Second * 5}, server.URL)
 	resp := &structs.GetGenesisResponse{}
-	require.NoError(t, jsonRestHandler.Get(ctx, endpoint+"?arg1=abc&arg2=def", resp))
+	require.NoError(t, handler.Get(ctx, endpoint+"?arg1=abc&arg2=def", resp))
 	assert.DeepEqual(t, genesisJson, resp)
 }
 
@@ -75,9 +75,9 @@ func TestGetSSZ(t *testing.T) {
 		server := httptest.NewServer(mux)
 		defer server.Close()
 
-		jsonRestHandler := rest.NewRestHandler(http.Client{Timeout: time.Second * 5}, server.URL)
+		handler := rest.NewHandler(http.Client{Timeout: time.Second * 5}, server.URL)
 
-		body, header, err := jsonRestHandler.GetSSZ(ctx, endpoint)
+		body, header, err := handler.GetSSZ(ctx, endpoint)
 		require.NoError(t, err)
 		assert.DeepEqual(t, expectedBody, body)
 		require.StringContains(t, api.OctetStreamMediaType, header.Get("Content-Type"))
@@ -101,9 +101,9 @@ func TestGetSSZ(t *testing.T) {
 		server := httptest.NewServer(mux)
 		defer server.Close()
 
-		jsonRestHandler := rest.NewRestHandler(http.Client{Timeout: time.Second * 5}, server.URL)
+		handler := rest.NewHandler(http.Client{Timeout: time.Second * 5}, server.URL)
 
-		body, header, err := jsonRestHandler.GetSSZ(ctx, endpoint)
+		body, header, err := handler.GetSSZ(ctx, endpoint)
 		require.NoError(t, err)
 		assert.LogsContain(t, logHook, "Server responded with non primary accept type")
 		require.Equal(t, api.JsonMediaType, header.Get("Content-Type"))
@@ -126,9 +126,9 @@ func TestGetSSZ(t *testing.T) {
 		server := httptest.NewServer(mux)
 		defer server.Close()
 
-		jsonRestHandler := rest.NewRestHandler(http.Client{Timeout: time.Second * 5}, server.URL)
+		handler := rest.NewHandler(http.Client{Timeout: time.Second * 5}, server.URL)
 
-		_, _, err := jsonRestHandler.GetSSZ(ctx, endpoint)
+		_, _, err := handler.GetSSZ(ctx, endpoint)
 		require.NoError(t, err)
 		assert.LogsContain(t, logHook, "Server responded with non primary accept type")
 	})
@@ -148,7 +148,7 @@ func TestAcceptOverrideSSZ(t *testing.T) {
 		require.NoError(t, err)
 	}))
 	defer srv.Close()
-	c := rest.NewRestHandler(http.Client{Timeout: time.Second * 5}, srv.URL)
+	c := rest.NewHandler(http.Client{Timeout: time.Second * 5}, srv.URL)
 	_, _, err := c.GetSSZ(t.Context(), "/test")
 	require.NoError(t, err)
 }
@@ -191,9 +191,9 @@ func TestPost(t *testing.T) {
 	server := httptest.NewServer(mux)
 	defer server.Close()
 
-	jsonRestHandler := rest.NewRestHandler(http.Client{Timeout: time.Second * 5}, server.URL)
+	handler := rest.NewHandler(http.Client{Timeout: time.Second * 5}, server.URL)
 	resp := &structs.GetGenesisResponse{}
-	require.NoError(t, jsonRestHandler.Post(ctx, endpoint, headers, bytes.NewBuffer(dataBytes), resp))
+	require.NoError(t, handler.Post(ctx, endpoint, headers, bytes.NewBuffer(dataBytes), resp))
 	assert.DeepEqual(t, genesisJson, resp)
 }
 
@@ -238,18 +238,18 @@ func TestGetStatusCode(t *testing.T) {
 			server := httptest.NewServer(mux)
 			defer server.Close()
 
-			jsonRestHandler := rest.NewRestHandler(http.Client{Timeout: time.Second * 5}, server.URL)
+			handler := rest.NewHandler(http.Client{Timeout: time.Second * 5}, server.URL)
 
-			statusCode, err := jsonRestHandler.GetStatusCode(ctx, endpoint)
+			statusCode, err := handler.GetStatusCode(ctx, endpoint)
 			require.NoError(t, err)
 			assert.Equal(t, tc.expectedStatusCode, statusCode)
 		})
 	}
 
 	t.Run("returns error on connection failure", func(t *testing.T) {
-		jsonRestHandler := rest.NewRestHandler(http.Client{Timeout: time.Millisecond * 100}, "http://localhost:99999")
+		handler := rest.NewHandler(http.Client{Timeout: time.Millisecond * 100}, "http://localhost:99999")
 
-		_, err := jsonRestHandler.GetStatusCode(ctx, endpoint)
+		_, err := handler.GetStatusCode(ctx, endpoint)
 		require.ErrorContains(t, "failed to perform request", err)
 	})
 }

validator/client/beacon-api/state_validators.go

@@ -22,7 +22,7 @@ type StateValidatorsProvider interface {
 }
 
 type beaconApiStateValidatorsProvider struct {
-	jsonRestHandler rest.RestHandler
+	handler rest.Handler
 }
 
 func (c beaconApiStateValidatorsProvider) StateValidators(
@@ -94,7 +94,7 @@ func (c beaconApiStateValidatorsProvider) getStateValidatorsHelper(
 	}
 	stateValidatorsJson := &structs.GetValidatorsResponse{}
 	// First try POST endpoint to check whether it is supported by the beacon node.
-	if err = c.jsonRestHandler.Post(ctx, endpoint, nil, bytes.NewBuffer(reqBytes), stateValidatorsJson); err == nil {
+	if err = c.handler.Post(ctx, endpoint, nil, bytes.NewBuffer(reqBytes), stateValidatorsJson); err == nil {
 		if stateValidatorsJson.Data == nil {
 			return nil, errors.New("stateValidatorsJson.Data is nil")
 		}
@@ -116,7 +116,7 @@ func (c beaconApiStateValidatorsProvider) getStateValidatorsHelper(
 
 	query := apiutil.BuildURL(endpoint, queryParams)
 
-	err = c.jsonRestHandler.Get(ctx, query, stateValidatorsJson)
+	err = c.handler.Get(ctx, query, stateValidatorsJson)
 	if err != nil {
 		return nil, err
 	}

validator/client/beacon-api/state_validators_test.go

@@ -34,7 +34,7 @@ func TestGetStateValidators_Nominal_POST(t *testing.T) {
 	require.NoError(t, err)
 
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	wanted := []*structs.ValidatorContainer{
 		{
@@ -69,7 +69,7 @@ func TestGetStateValidators_Nominal_POST(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -84,7 +84,7 @@ func TestGetStateValidators_Nominal_POST(t *testing.T) {
 		},
 	).Times(1)
 
-	stateValidatorsProvider := beaconApiStateValidatorsProvider{jsonRestHandler: jsonRestHandler}
+	stateValidatorsProvider := beaconApiStateValidatorsProvider{handler: handler}
 	actual, err := stateValidatorsProvider.StateValidators(ctx, []string{
 		"0x8000091c2ae64ee414a54c1cc1fc67dec663408bc636cb86756e0200e41a75c8f86603f104f02c856983d2783116be13", // active_ongoing
 		"0x80000e851c0f53c3246ff726d7ff7766661ca5e12a07c45c114d208d54f0f8233d4380b2e9aff759d69795d1df905526", // active_exiting
@@ -120,7 +120,7 @@ func TestGetStateValidators_Nominal_GET(t *testing.T) {
 	require.NoError(t, err)
 
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	wanted := []*structs.ValidatorContainer{
 		{
@@ -156,7 +156,7 @@ func TestGetStateValidators_Nominal_GET(t *testing.T) {
 	ctx := t.Context()
 
 	// First return an error from POST call.
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -177,7 +177,7 @@ func TestGetStateValidators_Nominal_GET(t *testing.T) {
 
 	query := apiutil.BuildURL("/eth/v1/beacon/states/head/validators", queryParams)
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		query,
 		&stateValidatorsResponseJson,
@@ -190,7 +190,7 @@ func TestGetStateValidators_Nominal_GET(t *testing.T) {
 		},
 	).Times(1)
 
-	stateValidatorsProvider := beaconApiStateValidatorsProvider{jsonRestHandler: jsonRestHandler}
+	stateValidatorsProvider := beaconApiStateValidatorsProvider{handler: handler}
 	actual, err := stateValidatorsProvider.StateValidators(ctx, []string{
 		"0x8000091c2ae64ee414a54c1cc1fc67dec663408bc636cb86756e0200e41a75c8f86603f104f02c856983d2783116be13", // active_ongoing
 		"0x80000e851c0f53c3246ff726d7ff7766661ca5e12a07c45c114d208d54f0f8233d4380b2e9aff759d69795d1df905526", // active_exiting
@@ -220,12 +220,12 @@ func TestGetStateValidators_GetRestJsonResponseOnError(t *testing.T) {
 	require.NoError(t, err)
 
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	ctx := t.Context()
 
 	// First call POST.
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -246,7 +246,7 @@ func TestGetStateValidators_GetRestJsonResponseOnError(t *testing.T) {
 
 	query := apiutil.BuildURL("/eth/v1/beacon/states/head/validators", queryParams)
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		query,
 		&stateValidatorsResponseJson,
@@ -254,7 +254,7 @@ func TestGetStateValidators_GetRestJsonResponseOnError(t *testing.T) {
 		errors.New("an error"),
 	).Times(1)
 
-	stateValidatorsProvider := beaconApiStateValidatorsProvider{jsonRestHandler: jsonRestHandler}
+	stateValidatorsProvider := beaconApiStateValidatorsProvider{handler: handler}
 	_, err = stateValidatorsProvider.StateValidators(ctx, []string{
 		"0x8000091c2ae64ee414a54c1cc1fc67dec663408bc636cb86756e0200e41a75c8f86603f104f02c856983d2783116be13", // active_ongoing
 	},
@@ -277,9 +277,9 @@ func TestGetStateValidators_DataIsNil_POST(t *testing.T) {
 
 	ctx := t.Context()
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil, bytes.NewBuffer(reqBytes),
@@ -293,7 +293,7 @@ func TestGetStateValidators_DataIsNil_POST(t *testing.T) {
 		},
 	).Times(1)
 
-	stateValidatorsProvider := beaconApiStateValidatorsProvider{jsonRestHandler: jsonRestHandler}
+	stateValidatorsProvider := beaconApiStateValidatorsProvider{handler: handler}
 	_, err = stateValidatorsProvider.StateValidators(ctx, []string{
 		"0x8000091c2ae64ee414a54c1cc1fc67dec663408bc636cb86756e0200e41a75c8f86603f104f02c856983d2783116be13", // active_ongoing
 	},
@@ -316,10 +316,10 @@ func TestGetStateValidators_DataIsNil_GET(t *testing.T) {
 
 	ctx := t.Context()
 	stateValidatorsResponseJson := structs.GetValidatorsResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	// First call POST which will return an error.
-	jsonRestHandler.EXPECT().Post(
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validators",
 		nil,
@@ -340,7 +340,7 @@ func TestGetStateValidators_DataIsNil_GET(t *testing.T) {
 
 	query := apiutil.BuildURL("/eth/v1/beacon/states/head/validators", queryParams)
 
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		query,
 		&stateValidatorsResponseJson,
@@ -353,7 +353,7 @@ func TestGetStateValidators_DataIsNil_GET(t *testing.T) {
 		},
 	).Times(1)
 
-	stateValidatorsProvider := beaconApiStateValidatorsProvider{jsonRestHandler: jsonRestHandler}
+	stateValidatorsProvider := beaconApiStateValidatorsProvider{handler: handler}
 	_, err = stateValidatorsProvider.StateValidators(ctx, []string{
 		"0x8000091c2ae64ee414a54c1cc1fc67dec663408bc636cb86756e0200e41a75c8f86603f104f02c856983d2783116be13", // active_ongoing
 	},

validator/client/beacon-api/status_test.go

@@ -50,19 +50,19 @@ func TestValidatorStatus_Nominal(t *testing.T) {
 		nil,
 	).Times(1)
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 	validatorClient := beaconApiValidatorClient{
 		stateValidatorsProvider: stateValidatorsProvider,
 		prysmChainClient: prysmChainClient{
 			nodeClient: &beaconApiNodeClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 			},
 		},
 	}
 
 	// Expect node version endpoint call.
 	var nodeVersionResponse structs.GetVersionResponse
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/node/version",
 		&nodeVersionResponse,
@@ -165,11 +165,11 @@ func TestMultipleValidatorStatus_Nominal(t *testing.T) {
 		nil,
 	).Times(1)
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	// Expect node version endpoint call.
 	var nodeVersionResponse structs.GetVersionResponse
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/node/version",
 		&nodeVersionResponse,
@@ -181,7 +181,7 @@ func TestMultipleValidatorStatus_Nominal(t *testing.T) {
 		stateValidatorsProvider: stateValidatorsProvider,
 		prysmChainClient: prysmChainClient{
 			nodeClient: &beaconApiNodeClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 			},
 		},
 	}
@@ -317,11 +317,11 @@ func TestGetValidatorsStatusResponse_Nominal_SomeActiveValidators(t *testing.T)
 		nil,
 	).Times(1)
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	// Expect node version endpoint call.
 	var nodeVersionResponse structs.GetVersionResponse
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/node/version",
 		&nodeVersionResponse,
@@ -333,7 +333,7 @@ func TestGetValidatorsStatusResponse_Nominal_SomeActiveValidators(t *testing.T)
 	).Times(1)
 
 	var validatorCountResponse structs.GetValidatorCountResponse
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/states/head/validator_count?",
 		&validatorCountResponse,
@@ -420,9 +420,9 @@ func TestGetValidatorsStatusResponse_Nominal_SomeActiveValidators(t *testing.T)
 		stateValidatorsProvider: stateValidatorsProvider,
 		prysmChainClient: prysmChainClient{
 			nodeClient: &beaconApiNodeClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 			},
-			jsonRestHandler: jsonRestHandler,
+			handler: handler,
 		},
 	}
 	actualValidatorsPubKey, actualValidatorsIndex, actualValidatorsStatusResponse, err := validatorClient.validatorsStatusResponse(ctx, validatorsPubKey, validatorsIndex)
@@ -465,11 +465,11 @@ func TestGetValidatorsStatusResponse_Nominal_NoActiveValidators(t *testing.T) {
 		nil,
 	).Times(1)
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	// Expect node version endpoint call.
 	var nodeVersionResponse structs.GetVersionResponse
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/node/version",
 		&nodeVersionResponse,
@@ -490,9 +490,9 @@ func TestGetValidatorsStatusResponse_Nominal_NoActiveValidators(t *testing.T) {
 		stateValidatorsProvider: stateValidatorsProvider,
 		prysmChainClient: prysmChainClient{
 			nodeClient: &beaconApiNodeClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 			},
-			jsonRestHandler: jsonRestHandler,
+			handler: handler,
 		},
 	}
 	actualValidatorsPubKey, actualValidatorsIndex, actualValidatorsStatusResponse, err := validatorClient.validatorsStatusResponse(ctx, wantedValidatorsPubKey, nil)
@@ -704,11 +704,11 @@ func TestValidatorStatusResponse_InvalidData(t *testing.T) {
 					testCase.inputGetStateValidatorsInterface.outputErr,
 				).Times(1)
 
-				jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+				handler := mock.NewMockJsonRestHandler(ctrl)
 
 				// Expect node version endpoint call.
 				var nodeVersionResponse structs.GetVersionResponse
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					"/eth/v1/node/version",
 					&nodeVersionResponse,
@@ -720,9 +720,9 @@ func TestValidatorStatusResponse_InvalidData(t *testing.T) {
 					stateValidatorsProvider: stateValidatorsProvider,
 					prysmChainClient: prysmChainClient{
 						nodeClient: &beaconApiNodeClient{
-							jsonRestHandler: jsonRestHandler,
+							handler: handler,
 						},
-						jsonRestHandler: jsonRestHandler,
+						handler: handler,
 					},
 				}
 

validator/client/beacon-api/stream_blocks.go

@@ -72,7 +72,7 @@ func (c *beaconApiValidatorClient) headSignedBeaconBlock(ctx context.Context) (*
 	// Since we don't know yet what the json looks like, we unmarshal into an abstract structure that has only a version
 	// and a blob of data
 	signedBlockResponseJson := abstractSignedBlockResponseJson{}
-	if err := c.jsonRestHandler.Get(ctx, "/eth/v2/beacon/blocks/head", &signedBlockResponseJson); err != nil {
+	if err := c.handler.Get(ctx, "/eth/v2/beacon/blocks/head", &signedBlockResponseJson); err != nil {
 		return nil, err
 	}
 

validator/client/beacon-api/stream_blocks_test.go

@@ -24,8 +24,8 @@ func TestStreamBlocks_UnsupportedConsensusVersion(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		gomock.Any(),
 		&abstractSignedBlockResponseJson{},
@@ -36,7 +36,7 @@ func TestStreamBlocks_UnsupportedConsensusVersion(t *testing.T) {
 		nil,
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	streamBlocksClient := validatorClient.streamBlocks(ctx, &eth.StreamBlocksRequest{}, time.Millisecond*100)
 	_, err := streamBlocksClient.Recv()
 	assert.ErrorContains(t, "unsupported consensus version `foo`", err)
@@ -146,8 +146,8 @@ func TestStreamBlocks_Error(t *testing.T) {
 
 					ctx := t.Context()
 
-					jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-					jsonRestHandler.EXPECT().Get(
+					handler := mock.NewMockJsonRestHandler(ctrl)
+					handler.EXPECT().Get(
 						gomock.Any(),
 						gomock.Any(),
 						&abstractSignedBlockResponseJson{},
@@ -162,7 +162,7 @@ func TestStreamBlocks_Error(t *testing.T) {
 					).Times(1)
 
 					beaconBlockConverter := testSuite.generateBeaconBlockConverter(ctrl, testCase.conversionError)
-					validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler, beaconBlockConverter: beaconBlockConverter}
+					validatorClient := &beaconApiValidatorClient{handler: handler, beaconBlockConverter: beaconBlockConverter}
 					streamBlocksClient := validatorClient.streamBlocks(ctx, &eth.StreamBlocksRequest{}, time.Millisecond*100)
 
 					_, err := streamBlocksClient.Recv()
@@ -197,7 +197,7 @@ func TestStreamBlocks_Phase0Valid(t *testing.T) {
 			ctx := t.Context()
 
 			signedBlockResponseJson := abstractSignedBlockResponseJson{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 			beaconBlockConverter := mock.NewMockBeaconBlockConverter(ctrl)
 
 			// For the first call, return a block that satisfies the verifiedOnly condition. This block should be returned by the first Recv().
@@ -212,7 +212,7 @@ func TestStreamBlocks_Phase0Valid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer1, err := json.Marshal(signedBeaconBlockContainer1)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -249,7 +249,7 @@ func TestStreamBlocks_Phase0Valid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer2, err := json.Marshal(signedBeaconBlockContainer2)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -276,7 +276,7 @@ func TestStreamBlocks_Phase0Valid(t *testing.T) {
 
 			// The fourth call is only necessary when verifiedOnly == true since the previous block was optimistic
 			if testCase.verifiedOnly {
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					"/eth/v2/beacon/blocks/head",
 					&signedBlockResponseJson,
@@ -299,7 +299,7 @@ func TestStreamBlocks_Phase0Valid(t *testing.T) {
 				).Times(1)
 			}
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler, beaconBlockConverter: beaconBlockConverter}
+			validatorClient := &beaconApiValidatorClient{handler: handler, beaconBlockConverter: beaconBlockConverter}
 			streamBlocksClient := validatorClient.streamBlocks(ctx, &eth.StreamBlocksRequest{VerifiedOnly: testCase.verifiedOnly}, time.Millisecond*100)
 
 			// Get the first block
@@ -358,7 +358,7 @@ func TestStreamBlocks_AltairValid(t *testing.T) {
 			ctx := t.Context()
 
 			signedBlockResponseJson := abstractSignedBlockResponseJson{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 			beaconBlockConverter := mock.NewMockBeaconBlockConverter(ctrl)
 
 			// For the first call, return a block that satisfies the verifiedOnly condition. This block should be returned by the first Recv().
@@ -373,7 +373,7 @@ func TestStreamBlocks_AltairValid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer1, err := json.Marshal(signedBeaconBlockContainer1)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -410,7 +410,7 @@ func TestStreamBlocks_AltairValid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer2, err := json.Marshal(signedBeaconBlockContainer2)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -437,7 +437,7 @@ func TestStreamBlocks_AltairValid(t *testing.T) {
 
 			// The fourth call is only necessary when verifiedOnly == true since the previous block was optimistic
 			if testCase.verifiedOnly {
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					"/eth/v2/beacon/blocks/head",
 					&signedBlockResponseJson,
@@ -460,7 +460,7 @@ func TestStreamBlocks_AltairValid(t *testing.T) {
 				).Times(1)
 			}
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler, beaconBlockConverter: beaconBlockConverter}
+			validatorClient := &beaconApiValidatorClient{handler: handler, beaconBlockConverter: beaconBlockConverter}
 			streamBlocksClient := validatorClient.streamBlocks(ctx, &eth.StreamBlocksRequest{VerifiedOnly: testCase.verifiedOnly}, time.Millisecond*100)
 
 			// Get the first block
@@ -519,7 +519,7 @@ func TestStreamBlocks_BellatrixValid(t *testing.T) {
 			ctx := t.Context()
 
 			signedBlockResponseJson := abstractSignedBlockResponseJson{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 			beaconBlockConverter := mock.NewMockBeaconBlockConverter(ctrl)
 
 			// For the first call, return a block that satisfies the verifiedOnly condition. This block should be returned by the first Recv().
@@ -534,7 +534,7 @@ func TestStreamBlocks_BellatrixValid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer1, err := json.Marshal(signedBeaconBlockContainer1)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -571,7 +571,7 @@ func TestStreamBlocks_BellatrixValid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer2, err := json.Marshal(signedBeaconBlockContainer2)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -598,7 +598,7 @@ func TestStreamBlocks_BellatrixValid(t *testing.T) {
 
 			// The fourth call is only necessary when verifiedOnly == true since the previous block was optimistic
 			if testCase.verifiedOnly {
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					"/eth/v2/beacon/blocks/head",
 					&signedBlockResponseJson,
@@ -621,7 +621,7 @@ func TestStreamBlocks_BellatrixValid(t *testing.T) {
 				).Times(1)
 			}
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler, beaconBlockConverter: beaconBlockConverter}
+			validatorClient := &beaconApiValidatorClient{handler: handler, beaconBlockConverter: beaconBlockConverter}
 			streamBlocksClient := validatorClient.streamBlocks(ctx, &eth.StreamBlocksRequest{VerifiedOnly: testCase.verifiedOnly}, time.Millisecond*100)
 
 			// Get the first block
@@ -680,7 +680,7 @@ func TestStreamBlocks_CapellaValid(t *testing.T) {
 			ctx := t.Context()
 
 			signedBlockResponseJson := abstractSignedBlockResponseJson{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 			beaconBlockConverter := mock.NewMockBeaconBlockConverter(ctrl)
 
 			// For the first call, return a block that satisfies the verifiedOnly condition. This block should be returned by the first Recv().
@@ -695,7 +695,7 @@ func TestStreamBlocks_CapellaValid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer1, err := json.Marshal(signedBeaconBlockContainer1)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -732,7 +732,7 @@ func TestStreamBlocks_CapellaValid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer2, err := json.Marshal(signedBeaconBlockContainer2)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -759,7 +759,7 @@ func TestStreamBlocks_CapellaValid(t *testing.T) {
 
 			// The fourth call is only necessary when verifiedOnly == true since the previous block was optimistic
 			if testCase.verifiedOnly {
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					"/eth/v2/beacon/blocks/head",
 					&signedBlockResponseJson,
@@ -782,7 +782,7 @@ func TestStreamBlocks_CapellaValid(t *testing.T) {
 				).Times(1)
 			}
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler, beaconBlockConverter: beaconBlockConverter}
+			validatorClient := &beaconApiValidatorClient{handler: handler, beaconBlockConverter: beaconBlockConverter}
 			streamBlocksClient := validatorClient.streamBlocks(ctx, &eth.StreamBlocksRequest{VerifiedOnly: testCase.verifiedOnly}, time.Millisecond*100)
 
 			// Get the first block
@@ -841,7 +841,7 @@ func TestStreamBlocks_DenebValid(t *testing.T) {
 			ctx := t.Context()
 
 			signedBlockResponseJson := abstractSignedBlockResponseJson{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 			beaconBlockConverter := mock.NewMockBeaconBlockConverter(ctrl)
 
 			// For the first call, return a block that satisfies the verifiedOnly condition. This block should be returned by the first Recv().
@@ -856,7 +856,7 @@ func TestStreamBlocks_DenebValid(t *testing.T) {
 
 			marshalledSignedBeaconBlockContainer1, err := json.Marshal(denebBlock)
 			require.NoError(t, err)
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -885,7 +885,7 @@ func TestStreamBlocks_DenebValid(t *testing.T) {
 			marshalledSignedBeaconBlockContainer2, err := json.Marshal(denebBlock2)
 			require.NoError(t, err)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v2/beacon/blocks/head",
 				&signedBlockResponseJson,
@@ -902,7 +902,7 @@ func TestStreamBlocks_DenebValid(t *testing.T) {
 
 			// The fourth call is only necessary when verifiedOnly == true since the previous block was optimistic
 			if testCase.verifiedOnly {
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					"/eth/v2/beacon/blocks/head",
 					&signedBlockResponseJson,
@@ -918,7 +918,7 @@ func TestStreamBlocks_DenebValid(t *testing.T) {
 				).Times(1)
 			}
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler, beaconBlockConverter: beaconBlockConverter}
+			validatorClient := &beaconApiValidatorClient{handler: handler, beaconBlockConverter: beaconBlockConverter}
 			streamBlocksClient := validatorClient.streamBlocks(ctx, &eth.StreamBlocksRequest{VerifiedOnly: testCase.verifiedOnly}, time.Millisecond*100)
 
 			// Get the first block

validator/client/beacon-api/submit_aggregate_selection_proof.go

@@ -129,7 +129,7 @@ func (c *beaconApiValidatorClient) aggregateAttestation(
 	endpoint := apiutil.BuildURL("/eth/v2/validator/aggregate_attestation", params)
 
 	var aggregateAttestationResponse structs.AggregateAttestationResponse
-	err := c.jsonRestHandler.Get(ctx, endpoint, &aggregateAttestationResponse)
+	err := c.handler.Get(ctx, endpoint, &aggregateAttestationResponse)
 	if err != nil {
 		return nil, err
 	}
@@ -150,7 +150,7 @@ func (c *beaconApiValidatorClient) aggregateAttestationElectra(
 	endpoint := apiutil.BuildURL("/eth/v2/validator/aggregate_attestation", params)
 
 	var aggregateAttestationResponse structs.AggregateAttestationResponse
-	if err := c.jsonRestHandler.Get(ctx, endpoint, &aggregateAttestationResponse); err != nil {
+	if err := c.handler.Get(ctx, endpoint, &aggregateAttestationResponse); err != nil {
 		return nil, err
 	}
 

validator/client/beacon-api/submit_aggregate_selection_proof_test.go

@@ -94,10 +94,10 @@ func TestSubmitAggregateSelectionProof(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			// Call node syncing endpoint to check if head is optimistic.
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				syncingEndpoint,
 				&structs.SyncStatusResponse{},
@@ -113,7 +113,7 @@ func TestSubmitAggregateSelectionProof(t *testing.T) {
 			).Times(1)
 
 			// Call attestation data to get attestation data root to query aggregate attestation.
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				fmt.Sprintf("%s?committee_index=%d&slot=%d", attestationDataEndpoint, committeeIndex, slot),
 				&structs.GetAttestationDataResponse{},
@@ -128,7 +128,7 @@ func TestSubmitAggregateSelectionProof(t *testing.T) {
 			require.NoError(t, err)
 
 			// Call attestation data to get attestation data root to query aggregate attestation.
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				fmt.Sprintf("%s?attestation_data_root=%s&committee_index=%d&slot=%d", aggregateAttestationEndpoint, hexutil.Encode(attestationDataRootBytes[:]), committeeIndex, slot),
 				&structs.AggregateAttestationResponse{},
@@ -156,12 +156,12 @@ func TestSubmitAggregateSelectionProof(t *testing.T) {
 			}
 
 			validatorClient := &beaconApiValidatorClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 				stateValidatorsProvider: beaconApiStateValidatorsProvider{
-					jsonRestHandler: jsonRestHandler,
+					handler: handler,
 				},
 				dutiesProvider: beaconApiDutiesProvider{
-					jsonRestHandler: jsonRestHandler,
+					handler: handler,
 				},
 			}
 
@@ -263,10 +263,10 @@ func TestSubmitAggregateSelectionProofElectra(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			// Call node syncing endpoint to check if head is optimistic.
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				syncingEndpoint,
 				&structs.SyncStatusResponse{},
@@ -282,7 +282,7 @@ func TestSubmitAggregateSelectionProofElectra(t *testing.T) {
 			).Times(1)
 
 			// Call attestation data to get attestation data root to query aggregate attestation.
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				fmt.Sprintf("%s?committee_index=%d&slot=%d", attestationDataEndpoint, committeeIndex, slot),
 				&structs.GetAttestationDataResponse{},
@@ -297,7 +297,7 @@ func TestSubmitAggregateSelectionProofElectra(t *testing.T) {
 			require.NoError(t, err)
 
 			// Call attestation data to get attestation data root to query aggregate attestation.
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				fmt.Sprintf("%s?attestation_data_root=%s&committee_index=%d&slot=%d", aggregateAttestationEndpoint, hexutil.Encode(attestationDataRootBytes[:]), committeeIndex, slot),
 				&structs.AggregateAttestationResponse{},
@@ -325,12 +325,12 @@ func TestSubmitAggregateSelectionProofElectra(t *testing.T) {
 			}
 
 			validatorClient := &beaconApiValidatorClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 				stateValidatorsProvider: beaconApiStateValidatorsProvider{
-					jsonRestHandler: jsonRestHandler,
+					handler: handler,
 				},
 				dutiesProvider: beaconApiDutiesProvider{
-					jsonRestHandler: jsonRestHandler,
+					handler: handler,
 				},
 			}
 

validator/client/beacon-api/submit_signed_aggregate_proof.go

@@ -18,7 +18,7 @@ func (c *beaconApiValidatorClient) submitSignedAggregateSelectionProof(ctx conte
 		return nil, errors.Wrap(err, "failed to marshal SignedAggregateAttestationAndProof")
 	}
 	headers := map[string]string{"Eth-Consensus-Version": version.String(in.SignedAggregateAndProof.Version())}
-	err = c.jsonRestHandler.Post(ctx, "/eth/v2/validator/aggregate_and_proofs", headers, bytes.NewBuffer(body), nil)
+	err = c.handler.Post(ctx, "/eth/v2/validator/aggregate_and_proofs", headers, bytes.NewBuffer(body), nil)
 	if err != nil {
 		return nil, err
 	}
@@ -39,7 +39,7 @@ func (c *beaconApiValidatorClient) submitSignedAggregateSelectionProofElectra(ct
 	dataSlot := in.SignedAggregateAndProof.Message.Aggregate.Data.Slot
 	consensusVersion := version.String(slots.ToForkVersion(dataSlot))
 	headers := map[string]string{"Eth-Consensus-Version": consensusVersion}
-	if err = c.jsonRestHandler.Post(ctx, "/eth/v2/validator/aggregate_and_proofs", headers, bytes.NewBuffer(body), nil); err != nil {
+	if err = c.handler.Post(ctx, "/eth/v2/validator/aggregate_and_proofs", headers, bytes.NewBuffer(body), nil); err != nil {
 		return nil, err
 	}
 

validator/client/beacon-api/submit_signed_aggregate_proof_test.go

@@ -28,8 +28,8 @@ func TestSubmitSignedAggregateSelectionProof_Valid(t *testing.T) {
 
 	ctx := t.Context()
 	headers := map[string]string{"Eth-Consensus-Version": version.String(signedAggregateAndProof.Message.Version())}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/validator/aggregate_and_proofs",
 		headers,
@@ -42,7 +42,7 @@ func TestSubmitSignedAggregateSelectionProof_Valid(t *testing.T) {
 	attestationDataRoot, err := signedAggregateAndProof.Message.Aggregate.Data.HashTreeRoot()
 	require.NoError(t, err)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	resp, err := validatorClient.submitSignedAggregateSelectionProof(ctx, &ethpb.SignedAggregateSubmitRequest{
 		SignedAggregateAndProof: signedAggregateAndProof,
 	})
@@ -60,8 +60,8 @@ func TestSubmitSignedAggregateSelectionProof_BadRequest(t *testing.T) {
 
 	ctx := t.Context()
 	headers := map[string]string{"Eth-Consensus-Version": version.String(signedAggregateAndProof.Message.Version())}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/validator/aggregate_and_proofs",
 		headers,
@@ -71,7 +71,7 @@ func TestSubmitSignedAggregateSelectionProof_BadRequest(t *testing.T) {
 		errors.New("bad request"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err = validatorClient.submitSignedAggregateSelectionProof(ctx, &ethpb.SignedAggregateSubmitRequest{
 		SignedAggregateAndProof: signedAggregateAndProof,
 	})
@@ -93,8 +93,8 @@ func TestSubmitSignedAggregateSelectionProofElectra_Valid(t *testing.T) {
 	ctx := t.Context()
 	expectedVersion := version.String(slots.ToForkVersion(signedAggregateAndProofElectra.Message.Aggregate.Data.Slot))
 	headers := map[string]string{"Eth-Consensus-Version": expectedVersion}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/validator/aggregate_and_proofs",
 		headers,
@@ -107,7 +107,7 @@ func TestSubmitSignedAggregateSelectionProofElectra_Valid(t *testing.T) {
 	attestationDataRoot, err := signedAggregateAndProofElectra.Message.Aggregate.Data.HashTreeRoot()
 	require.NoError(t, err)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	resp, err := validatorClient.submitSignedAggregateSelectionProofElectra(ctx, &ethpb.SignedAggregateSubmitElectraRequest{
 		SignedAggregateAndProof: signedAggregateAndProofElectra,
 	})
@@ -130,8 +130,8 @@ func TestSubmitSignedAggregateSelectionProofElectra_BadRequest(t *testing.T) {
 	ctx := t.Context()
 	expectedVersion := version.String(slots.ToForkVersion(signedAggregateAndProofElectra.Message.Aggregate.Data.Slot))
 	headers := map[string]string{"Eth-Consensus-Version": expectedVersion}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/validator/aggregate_and_proofs",
 		headers,
@@ -141,7 +141,7 @@ func TestSubmitSignedAggregateSelectionProofElectra_BadRequest(t *testing.T) {
 		errors.New("bad request"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err = validatorClient.submitSignedAggregateSelectionProofElectra(ctx, &ethpb.SignedAggregateSubmitElectraRequest{
 		SignedAggregateAndProof: signedAggregateAndProofElectra,
 	})
@@ -163,8 +163,8 @@ func TestSubmitSignedAggregateSelectionProofElectra_FuluVersion(t *testing.T) {
 	ctx := t.Context()
 	expectedVersion := version.String(slots.ToForkVersion(signedAggregateAndProofElectra.Message.Aggregate.Data.Slot))
 	headers := map[string]string{"Eth-Consensus-Version": expectedVersion}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v2/validator/aggregate_and_proofs",
 		headers,
@@ -177,7 +177,7 @@ func TestSubmitSignedAggregateSelectionProofElectra_FuluVersion(t *testing.T) {
 	attestationDataRoot, err := signedAggregateAndProofElectra.Message.Aggregate.Data.HashTreeRoot()
 	require.NoError(t, err)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	resp, err := validatorClient.submitSignedAggregateSelectionProofElectra(ctx, &ethpb.SignedAggregateSubmitElectraRequest{
 		SignedAggregateAndProof: signedAggregateAndProofElectra,
 	})

validator/client/beacon-api/submit_signed_contribution_and_proof.go

@@ -47,7 +47,7 @@ func (c *beaconApiValidatorClient) submitSignedContributionAndProof(ctx context.
 		return errors.Wrap(err, "failed to marshall signed contribution and proof")
 	}
 
-	return c.jsonRestHandler.Post(
+	return c.handler.Post(
 		ctx,
 		"/eth/v1/validator/contribution_and_proofs",
 		nil,

validator/client/beacon-api/submit_signed_contribution_and_proof_test.go

@@ -43,8 +43,8 @@ func TestSubmitSignedContributionAndProof_Valid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		submitSignedContributionAndProofTestEndpoint,
 		nil,
@@ -69,7 +69,7 @@ func TestSubmitSignedContributionAndProof_Valid(t *testing.T) {
 		Signature: []byte{8},
 	}
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	err = validatorClient.submitSignedContributionAndProof(ctx, contributionAndProof)
 	require.NoError(t, err)
 }
@@ -117,9 +117,9 @@ func TestSubmitSignedContributionAndProof_Error(t *testing.T) {
 
 			ctx := t.Context()
 
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 			if testCase.httpRequestExpected {
-				jsonRestHandler.EXPECT().Post(
+				handler.EXPECT().Post(
 					gomock.Any(),
 					submitSignedContributionAndProofTestEndpoint,
 					gomock.Any(),
@@ -130,7 +130,7 @@ func TestSubmitSignedContributionAndProof_Error(t *testing.T) {
 				).Times(1)
 			}
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			err := validatorClient.submitSignedContributionAndProof(ctx, testCase.data)
 			assert.ErrorContains(t, testCase.expectedErrorMessage, err)
 		})

validator/client/beacon-api/subscribe_committee_subnets.go

@@ -36,7 +36,7 @@ func (c *beaconApiValidatorClient) subscribeCommitteeSubnets(ctx context.Context
 		return errors.Wrap(err, "failed to marshal committees subscriptions")
 	}
 
-	return c.jsonRestHandler.Post(
+	return c.handler.Post(
 		ctx,
 		"/eth/v1/validator/beacon_committee_subscriptions",
 		nil,

validator/client/beacon-api/subscribe_committee_subnets_test.go

@@ -44,8 +44,8 @@ func TestSubscribeCommitteeSubnets_Valid(t *testing.T) {
 
 	ctx := t.Context()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		subscribeCommitteeSubnetsTestEndpoint,
 		nil,
@@ -66,7 +66,7 @@ func TestSubscribeCommitteeSubnets_Valid(t *testing.T) {
 	}
 
 	validatorClient := &beaconApiValidatorClient{
-		jsonRestHandler: jsonRestHandler,
+		handler: handler,
 	}
 	err = validatorClient.subscribeCommitteeSubnets(
 		ctx,
@@ -205,9 +205,9 @@ func TestSubscribeCommitteeSubnets_Error(t *testing.T) {
 
 			ctx := t.Context()
 
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 			if testCase.expectSubscribeRestCall {
-				jsonRestHandler.EXPECT().Post(
+				handler.EXPECT().Post(
 					gomock.Any(),
 					subscribeCommitteeSubnetsTestEndpoint,
 					gomock.Any(),
@@ -219,7 +219,7 @@ func TestSubscribeCommitteeSubnets_Error(t *testing.T) {
 			}
 
 			validatorClient := &beaconApiValidatorClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 			}
 			err := validatorClient.subscribeCommitteeSubnets(ctx, testCase.subscribeRequest, testCase.duties)
 			assert.ErrorContains(t, testCase.expectedErrorMessage, err)

validator/client/beacon-api/sync_committee.go

@@ -31,13 +31,13 @@ func (c *beaconApiValidatorClient) submitSyncMessage(ctx context.Context, syncMe
 		return errors.Wrap(err, "failed to marshal sync committee message")
 	}
 
-	return c.jsonRestHandler.Post(ctx, endpoint, nil, bytes.NewBuffer(marshalledJsonSyncCommitteeMessage), nil)
+	return c.handler.Post(ctx, endpoint, nil, bytes.NewBuffer(marshalledJsonSyncCommitteeMessage), nil)
 }
 
 func (c *beaconApiValidatorClient) syncMessageBlockRoot(ctx context.Context) (*ethpb.SyncMessageBlockRootResponse, error) {
 	// Get head beacon block root.
 	var resp structs.BlockRootResponse
-	if err := c.jsonRestHandler.Get(ctx, "/eth/v1/beacon/blocks/head/root", &resp); err != nil {
+	if err := c.handler.Get(ctx, "/eth/v1/beacon/blocks/head/root", &resp); err != nil {
 		return nil, err
 	}
 
@@ -82,7 +82,7 @@ func (c *beaconApiValidatorClient) syncCommitteeContribution(
 	params.Add("beacon_block_root", blockRoot)
 
 	var resp structs.ProduceSyncCommitteeContributionResponse
-	if err = c.jsonRestHandler.Get(ctx, apiutil.BuildURL("/eth/v1/validator/sync_committee_contribution", params), &resp); err != nil {
+	if err = c.handler.Get(ctx, apiutil.BuildURL("/eth/v1/validator/sync_committee_contribution", params), &resp); err != nil {
 		return nil, err
 	}
 

validator/client/beacon-api/sync_committee_selections.go

@@ -20,7 +20,7 @@ func (c *beaconApiValidatorClient) aggregatedSyncSelections(ctx context.Context,
 	}
 
 	var resp aggregatedSyncSelectionResponse
-	err = c.jsonRestHandler.Post(ctx, "/eth/v1/validator/sync_committee_selections", nil, bytes.NewBuffer(body), &resp)
+	err = c.handler.Post(ctx, "/eth/v1/validator/sync_committee_selections", nil, bytes.NewBuffer(body), &resp)
 	if err != nil {
 		return nil, errors.Wrap(err, "error calling post endpoint")
 	}

validator/client/beacon-api/sync_committee_selections_test.go

@@ -96,13 +96,13 @@ func TestGetAggregatedSyncSelections(t *testing.T) {
 	for _, test := range testcases {
 		t.Run(test.name, func(t *testing.T) {
 			ctrl := gomock.NewController(t)
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+			handler := mock.NewMockJsonRestHandler(ctrl)
 
 			reqBody, err := json.Marshal(test.req)
 			require.NoError(t, err)
 
 			ctx := t.Context()
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				"/eth/v1/validator/sync_committee_selections",
 				nil,
@@ -115,7 +115,7 @@ func TestGetAggregatedSyncSelections(t *testing.T) {
 				test.endpointError,
 			).Times(1)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			res, err := validatorClient.AggregatedSyncSelections(ctx, test.req)
 			if test.expectedErrorMessage != "" {
 				require.ErrorContains(t, test.expectedErrorMessage, err)

validator/client/beacon-api/sync_committee_test.go

@@ -44,8 +44,8 @@ func TestSubmitSyncMessage_Valid(t *testing.T) {
 	marshalledJsonRegistrations, err := json.Marshal([]*structs.SyncCommitteeMessage{jsonSyncCommitteeMessage})
 	require.NoError(t, err)
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/pool/sync_committees",
 		nil,
@@ -62,7 +62,7 @@ func TestSubmitSyncMessage_Valid(t *testing.T) {
 		Signature:      decodedSignature,
 	}
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	res, err := validatorClient.SubmitSyncMessage(t.Context(), &protoSyncCommitteeMessage)
 
 	assert.DeepEqual(t, new(empty.Empty), res)
@@ -73,8 +73,8 @@ func TestSubmitSyncMessage_BadRequest(t *testing.T) {
 	ctrl := gomock.NewController(t)
 	defer ctrl.Finish()
 
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Post(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Post(
 		gomock.Any(),
 		"/eth/v1/beacon/pool/sync_committees",
 		nil,
@@ -84,7 +84,7 @@ func TestSubmitSyncMessage_BadRequest(t *testing.T) {
 		errors.New("foo error"),
 	).Times(1)
 
-	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	validatorClient := &beaconApiValidatorClient{handler: handler}
 	_, err := validatorClient.SubmitSyncMessage(t.Context(), &ethpb.SyncCommitteeMessage{})
 	assert.ErrorContains(t, "foo error", err)
 }
@@ -137,8 +137,8 @@ func TestGetSyncMessageBlockRoot(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().Get(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v1/beacon/blocks/head/root",
 				&structs.BlockRootResponse{},
@@ -149,7 +149,7 @@ func TestGetSyncMessageBlockRoot(t *testing.T) {
 				test.endpointError,
 			).Times(1)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			actualResponse, err := validatorClient.syncMessageBlockRoot(ctx)
 			if test.expectedErrorMessage != "" {
 				require.ErrorContains(t, test.expectedErrorMessage, err)
@@ -207,8 +207,8 @@ func TestGetSyncCommitteeContribution(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.name, func(t *testing.T) {
 			ctx := t.Context()
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().Get(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v1/beacon/blocks/head/root",
 				&structs.BlockRootResponse{},
@@ -223,7 +223,7 @@ func TestGetSyncCommitteeContribution(t *testing.T) {
 				nil,
 			).Times(1)
 
-			jsonRestHandler.EXPECT().Get(
+			handler.EXPECT().Get(
 				gomock.Any(),
 				fmt.Sprintf("/eth/v1/validator/sync_committee_contribution?beacon_block_root=%s&slot=%d&subcommittee_index=%d",
 					blockRoot, uint64(request.Slot), request.SubnetId),
@@ -235,7 +235,7 @@ func TestGetSyncCommitteeContribution(t *testing.T) {
 				test.endpointErr,
 			).Times(1)
 
-			validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+			validatorClient := &beaconApiValidatorClient{handler: handler}
 			actualResponse, err := validatorClient.syncCommitteeContribution(ctx, request)
 			if test.expectedErrMsg != "" {
 				require.ErrorContains(t, test.expectedErrMsg, err)
@@ -314,8 +314,8 @@ func TestGetSyncSubCommitteeIndex(t *testing.T) {
 			}
 			valsReqBytes, err := json.Marshal(valsReq)
 			require.NoError(t, err)
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().Post(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().Post(
 				gomock.Any(),
 				validatorsEndpoint,
 				nil,
@@ -350,7 +350,7 @@ func TestGetSyncSubCommitteeIndex(t *testing.T) {
 
 				query := apiutil.BuildURL("/eth/v1/beacon/states/head/validators", queryParams)
 
-				jsonRestHandler.EXPECT().Get(
+				handler.EXPECT().Get(
 					gomock.Any(),
 					query,
 					&structs.GetValidatorsResponse{},
@@ -367,7 +367,7 @@ func TestGetSyncSubCommitteeIndex(t *testing.T) {
 				syncDutiesCalled = 1
 			}
 
-			jsonRestHandler.EXPECT().Post(
+			handler.EXPECT().Post(
 				gomock.Any(),
 				fmt.Sprintf("%s/%d", syncDutiesEndpoint, slots.ToEpoch(slot)),
 				nil,
@@ -386,12 +386,12 @@ func TestGetSyncSubCommitteeIndex(t *testing.T) {
 			require.NoError(t, err)
 
 			validatorClient := &beaconApiValidatorClient{
-				jsonRestHandler: jsonRestHandler,
+				handler: handler,
 				stateValidatorsProvider: beaconApiStateValidatorsProvider{
-					jsonRestHandler: jsonRestHandler,
+					handler: handler,
 				},
 				dutiesProvider: beaconApiDutiesProvider{
-					jsonRestHandler: jsonRestHandler,
+					handler: handler,
 				},
 			}
 			actualResponse, err := validatorClient.syncSubcommitteeIndex(ctx, &ethpb.SyncSubcommitteeIndexRequest{

validator/client/beacon-api/test-helpers/BUILD.bazel

@@ -9,6 +9,7 @@ go_library(
         "capella_beacon_block_test_helpers.go",
         "deneb_beacon_block_test_helpers.go",
         "electra_beacon_block_test_helpers.go",
+        "fulu_beacon_block_test_helpers.go",
         "phase0_beacon_block_test_helpers.go",
         "test_helpers.go",
     ],

validator/client/beacon-api/test-helpers/fulu_beacon_block_test_helpers.go

@@ -0,0 +1,46 @@
+package test_helpers
+
+import (
+	"github.com/OffchainLabs/prysm/v7/api/server/structs"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+)
+
+func GenerateProtoFuluBeaconBlockContents() *ethpb.BeaconBlockContentsFulu {
+	electra := GenerateProtoElectraBeaconBlockContents()
+	return &ethpb.BeaconBlockContentsFulu{
+		Block:     electra.Block,
+		KzgProofs: electra.KzgProofs,
+		Blobs:     electra.Blobs,
+	}
+}
+
+func GenerateProtoBlindedFuluBeaconBlock() *ethpb.BlindedBeaconBlockFulu {
+	electra := GenerateProtoBlindedElectraBeaconBlock()
+	return &ethpb.BlindedBeaconBlockFulu{
+		Slot:          electra.Slot,
+		ProposerIndex: electra.ProposerIndex,
+		ParentRoot:    electra.ParentRoot,
+		StateRoot:     electra.StateRoot,
+		Body:          electra.Body,
+	}
+}
+
+func GenerateJsonFuluBeaconBlockContents() *structs.BeaconBlockContentsFulu {
+	electra := GenerateJsonElectraBeaconBlockContents()
+	return &structs.BeaconBlockContentsFulu{
+		Block:     electra.Block,
+		KzgProofs: electra.KzgProofs,
+		Blobs:     electra.Blobs,
+	}
+}
+
+func GenerateJsonBlindedFuluBeaconBlock() *structs.BlindedBeaconBlockFulu {
+	electra := GenerateJsonBlindedElectraBeaconBlock()
+	return &structs.BlindedBeaconBlockFulu{
+		Slot:          electra.Slot,
+		ProposerIndex: electra.ProposerIndex,
+		ParentRoot:    electra.ParentRoot,
+		StateRoot:     electra.StateRoot,
+		Body:          electra.Body,
+	}
+}

validator/client/beacon-api/wait_for_chain_start_test.go

@@ -21,8 +21,8 @@ func TestWaitForChainStart_ValidGenesis(t *testing.T) {
 
 	ctx := t.Context()
 	genesisResponseJson := structs.GetGenesisResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -38,7 +38,7 @@ func TestWaitForChainStart_ValidGenesis(t *testing.T) {
 		},
 	).Times(1)
 
-	genesisProvider := beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+	genesisProvider := beaconApiGenesisProvider{handler: handler}
 	validatorClient := beaconApiValidatorClient{genesisProvider: &genesisProvider}
 	resp, err := validatorClient.WaitForChainStart(ctx, &emptypb.Empty{})
 	assert.NoError(t, err)
@@ -88,8 +88,8 @@ func TestWaitForChainStart_BadGenesis(t *testing.T) {
 
 			ctx := t.Context()
 			genesisResponseJson := structs.GetGenesisResponse{}
-			jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-			jsonRestHandler.EXPECT().Get(
+			handler := mock.NewMockJsonRestHandler(ctrl)
+			handler.EXPECT().Get(
 				gomock.Any(),
 				"/eth/v1/beacon/genesis",
 				&genesisResponseJson,
@@ -102,7 +102,7 @@ func TestWaitForChainStart_BadGenesis(t *testing.T) {
 				},
 			).Times(1)
 
-			genesisProvider := beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+			genesisProvider := beaconApiGenesisProvider{handler: handler}
 			validatorClient := beaconApiValidatorClient{genesisProvider: &genesisProvider}
 			_, err := validatorClient.WaitForChainStart(ctx, &emptypb.Empty{})
 			assert.ErrorContains(t, testCase.errorMessage, err)
@@ -116,8 +116,8 @@ func TestWaitForChainStart_JsonResponseError(t *testing.T) {
 
 	ctx := t.Context()
 	genesisResponseJson := structs.GetGenesisResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
-	jsonRestHandler.EXPECT().Get(
+	handler := mock.NewMockJsonRestHandler(ctrl)
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -125,7 +125,7 @@ func TestWaitForChainStart_JsonResponseError(t *testing.T) {
 		errors.New("some specific json error"),
 	).Times(1)
 
-	genesisProvider := beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+	genesisProvider := beaconApiGenesisProvider{handler: handler}
 	validatorClient := beaconApiValidatorClient{genesisProvider: &genesisProvider}
 	_, err := validatorClient.WaitForChainStart(ctx, &emptypb.Empty{})
 	assert.ErrorContains(t, "failed to get genesis data", err)
@@ -139,10 +139,10 @@ func TestWaitForChainStart_JsonResponseError404(t *testing.T) {
 
 	ctx := t.Context()
 	genesisResponseJson := structs.GetGenesisResponse{}
-	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+	handler := mock.NewMockJsonRestHandler(ctrl)
 
 	// First, mock a request that receives a 404 error (which means that the genesis data is not available yet)
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -154,7 +154,7 @@ func TestWaitForChainStart_JsonResponseError404(t *testing.T) {
 	).Times(1)
 
 	// After receiving a 404 error, mock a request that actually has genesis data available
-	jsonRestHandler.EXPECT().Get(
+	handler.EXPECT().Get(
 		gomock.Any(),
 		"/eth/v1/beacon/genesis",
 		&genesisResponseJson,
@@ -170,7 +170,7 @@ func TestWaitForChainStart_JsonResponseError404(t *testing.T) {
 		},
 	).Times(1)
 
-	genesisProvider := beaconApiGenesisProvider{jsonRestHandler: jsonRestHandler}
+	genesisProvider := beaconApiGenesisProvider{handler: handler}
 	validatorClient := beaconApiValidatorClient{genesisProvider: &genesisProvider}
 	resp, err := validatorClient.WaitForChainStart(ctx, &emptypb.Empty{})
 	assert.NoError(t, err)

validator/client/grpc-api/BUILD.bazel

@@ -15,6 +15,7 @@ go_library(
     deps = [
         "//api/client:go_default_library",
         "//api/client/event:go_default_library",
+        "//api/fallback:go_default_library",
         "//api/server/structs:go_default_library",
         "//beacon-chain/rpc/eth/helpers:go_default_library",
         "//beacon-chain/state/state-native:go_default_library",
@@ -49,6 +50,7 @@ go_test(
     embed = [":go_default_library"],
     deps = [
         "//api/client/event:go_default_library",
+        "//api/grpc:go_default_library",
         "//api/server/structs:go_default_library",
         "//config/params:go_default_library",
         "//consensus-types/primitives:go_default_library",

validator/client/grpc-api/grpc_client_manager.go

@@ -10,11 +10,11 @@ import (
 // grpcClientManager handles dynamic gRPC client recreation when the connection changes.
 // It uses generics to work with any gRPC client type.
 type grpcClientManager[T any] struct {
-	mu        sync.Mutex
-	conn      validatorHelpers.NodeConnection
-	client    T
-	lastHost  string
-	newClient func(grpc.ClientConnInterface) T
+	mu              sync.Mutex
+	conn            validatorHelpers.NodeConnection
+	client          T
+	lastConnCounter uint64 // connection counter when client was last created; compared to detect host switches
+	newClient       func(grpc.ClientConnInterface) T
 }
 
 // newGrpcClientManager creates a new client manager with the given connection and client constructor.
@@ -23,22 +23,25 @@ func newGrpcClientManager[T any](
 	newClient func(grpc.ClientConnInterface) T,
 ) *grpcClientManager[T] {
 	return &grpcClientManager[T]{
-		conn:      conn,
-		newClient: newClient,
-		client:    newClient(conn.GetGrpcClientConn()),
-		lastHost:  conn.GetGrpcConnectionProvider().CurrentHost(),
+		conn:            conn,
+		newClient:       newClient,
+		client:          newClient(conn.GetGrpcClientConn()),
+		lastConnCounter: conn.GetGrpcConnectionProvider().ConnectionCounter(),
 	}
 }
 
 // getClient returns the current client, recreating it if the connection has changed.
+// It uses the provider's connection counter rather than the host string to detect changes,
+// which correctly handles host bounces (e.g., host0 → host1 → host0) where the host
+// string returns to its original value but the underlying connection has been replaced.
 func (m *grpcClientManager[T]) getClient() T {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 
-	currentHost := m.conn.GetGrpcConnectionProvider().CurrentHost()
-	if m.lastHost != currentHost {
+	currentCounter := m.conn.GetGrpcConnectionProvider().ConnectionCounter()
+	if m.lastConnCounter != currentCounter {
 		m.client = m.newClient(m.conn.GetGrpcClientConn())
-		m.lastHost = currentHost
+		m.lastConnCounter = currentCounter
 	}
 	return m.client
 }

validator/client/grpc-api/grpc_client_manager_test.go

@@ -14,6 +14,7 @@ import (
 type mockProvider struct {
 	hosts        []string
 	currentIndex int
+	connCounter  uint64
 	mu           sync.Mutex
 }
 
@@ -31,14 +32,22 @@ func (m *mockProvider) SwitchHost(index int) error {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.currentIndex = index
+	m.connCounter++
 	return nil
 }
 
+func (m *mockProvider) ConnectionCounter() uint64 {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	return m.connCounter
+}
+
 // nextHost is a test helper for round-robin simulation (not part of the interface).
 func (m *mockProvider) nextHost() {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	m.currentIndex = (m.currentIndex + 1) % len(m.hosts)
+	m.connCounter++
 }
 
 // testClient is a simple type for testing the generic client manager.
@@ -61,11 +70,11 @@ func testManager(t *testing.T, provider *mockProvider) (*grpcClientManager[*test
 }
 
 func TestGrpcClientManager(t *testing.T) {
-	t.Run("tracks host", func(t *testing.T) {
+	t.Run("tracks connection counter", func(t *testing.T) {
 		provider := &mockProvider{hosts: []string{"host1:4000", "host2:4000"}}
 		manager, count := testManager(t, provider)
 		assert.Equal(t, 1, *count)
-		assert.Equal(t, "host1:4000", manager.lastHost)
+		assert.Equal(t, uint64(0), manager.lastConnCounter)
 	})
 
 	t.Run("same host returns same client", func(t *testing.T) {
@@ -96,6 +105,30 @@ func TestGrpcClientManager(t *testing.T) {
 		assert.Equal(t, c2, c3)
 	})
 
+	t.Run("host bounce recreates client", func(t *testing.T) {
+		// Regression test: when host bounces (host0 → host1 → host0), the client
+		// must be recreated even though the host string returns to its original value,
+		// because the underlying *grpc.ClientConn was destroyed and replaced.
+		provider := &mockProvider{hosts: []string{"host1:4000", "host2:4000"}}
+		manager, count := testManager(t, provider)
+
+		c1 := manager.getClient()
+		assert.Equal(t, 1, c1.id)
+
+		// Switch to host2
+		provider.nextHost()
+		c2 := manager.getClient()
+		assert.Equal(t, 2, *count)
+		assert.Equal(t, 2, c2.id)
+
+		// Switch back to host1 — same host string but new connection
+		provider.nextHost()
+		assert.Equal(t, "host1:4000", provider.CurrentHost())
+		c3 := manager.getClient()
+		assert.Equal(t, 3, *count, "client should be recreated on host bounce")
+		assert.Equal(t, 3, c3.id)
+	})
+
 	t.Run("multiple host switches", func(t *testing.T) {
 		provider := &mockProvider{hosts: []string{"host1:4000", "host2:4000", "host3:4000"}}
 		manager, count := testManager(t, provider)

validator/client/grpc-api/grpc_node_client.go

@@ -38,7 +38,7 @@ func (c *grpcNodeClient) IsReady(ctx context.Context) bool {
 	// otherwise it will throw an error
 	_, err := c.getClient().GetHealth(ctx, &ethpb.HealthRequest{})
 	if err != nil {
-		log.WithError(err).Debug("Node is not ready")
+		log.WithError(err).WithField("url", c.conn.GetGrpcConnectionProvider().CurrentHost()).Debug("Node is not ready")
 		return false
 	}
 	return true

validator/client/grpc-api/grpc_node_client_test.go

@@ -58,10 +58,10 @@ func TestGrpcNodeClient_IsReady(t *testing.T) {
 			// Create client with injected mock
 			client := &grpcNodeClient{
 				grpcClientManager: &grpcClientManager[ethpb.NodeClient]{
-					conn:      conn,
-					client:    mockNodeClient,
-					lastHost:  "host1:4000",
-					newClient: func(grpc.ClientConnInterface) ethpb.NodeClient { return mockNodeClient },
+					conn:            conn,
+					client:          mockNodeClient,
+					lastConnCounter: 0,
+					newClient:       func(grpc.ClientConnInterface) ethpb.NodeClient { return mockNodeClient },
 				},
 			}
 

validator/client/grpc-api/grpc_validator_client.go

@@ -7,6 +7,7 @@ import (
 
 	"github.com/OffchainLabs/prysm/v7/api/client"
 	eventClient "github.com/OffchainLabs/prysm/v7/api/client/event"
+	"github.com/OffchainLabs/prysm/v7/api/fallback"
 	"github.com/OffchainLabs/prysm/v7/api/server/structs"
 	"github.com/OffchainLabs/prysm/v7/config/features"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
@@ -24,6 +25,7 @@ import (
 
 type grpcValidatorClient struct {
 	*grpcClientManager[ethpb.BeaconNodeValidatorClient]
+	nodeClient           *grpcNodeClient
 	isEventStreamRunning bool
 }
 
@@ -282,6 +284,9 @@ func (*grpcValidatorClient) AggregatedSyncSelections(context.Context, []iface.Sy
 func NewGrpcValidatorClient(conn validatorHelpers.NodeConnection) iface.ValidatorClient {
 	return &grpcValidatorClient{
 		grpcClientManager: newGrpcClientManager(conn, ethpb.NewBeaconNodeValidatorClient),
+		nodeClient: &grpcNodeClient{
+			grpcClientManager: newGrpcClientManager(conn, ethpb.NewNodeClient),
+		},
 	}
 }
 
@@ -382,16 +387,7 @@ func (c *grpcValidatorClient) Host() string {
 	return c.grpcClientManager.conn.GetGrpcConnectionProvider().CurrentHost()
 }
 
-func (c *grpcValidatorClient) SwitchHost(host string) {
+func (c *grpcValidatorClient) EnsureReady(ctx context.Context) bool {
 	provider := c.grpcClientManager.conn.GetGrpcConnectionProvider()
-	// Find the index of the requested host and switch to it
-	for i, h := range provider.Hosts() {
-		if h == host {
-			if err := provider.SwitchHost(i); err != nil {
-				log.WithError(err).WithField("host", host).Error("Failed to set gRPC host")
-			}
-			return
-		}
-	}
-	log.WithField("host", host).Warn("Requested gRPC host not found in configured endpoints")
+	return fallback.EnsureReady(ctx, provider, c.nodeClient)
 }

validator/client/grpc-api/grpc_validator_client_test.go

@@ -8,12 +8,14 @@ import (
 	"time"
 
 	eventClient "github.com/OffchainLabs/prysm/v7/api/client/event"
+	grpcutil "github.com/OffchainLabs/prysm/v7/api/grpc"
 	"github.com/OffchainLabs/prysm/v7/api/server/structs"
 	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
 	eth "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v7/testing/assert"
 	mock2 "github.com/OffchainLabs/prysm/v7/testing/mock"
 	"github.com/OffchainLabs/prysm/v7/testing/require"
+	validatorHelpers "github.com/OffchainLabs/prysm/v7/validator/helpers"
 	validatorTesting "github.com/OffchainLabs/prysm/v7/validator/testing"
 	logTest "github.com/sirupsen/logrus/hooks/test"
 	"go.uber.org/mock/gomock"
@@ -253,3 +255,94 @@ func TestStartEventStream(t *testing.T) {
 		})
 	}
 }
+
+func TestEnsureReady(t *testing.T) {
+	tests := []struct {
+		name           string
+		hosts          []string
+		healthResults  []error // one per GetHealth call in order
+		expectedResult bool
+		expectedIndex  int // expected provider index after EnsureReady
+	}{
+		{
+			name:           "Single host ready",
+			hosts:          []string{"host1:4000"},
+			healthResults:  []error{nil},
+			expectedResult: true,
+			expectedIndex:  0,
+		},
+		{
+			name:           "Single host not ready",
+			hosts:          []string{"host1:4000"},
+			healthResults:  []error{errors.New("not synced")},
+			expectedResult: false,
+			expectedIndex:  0,
+		},
+		{
+			name:           "Multiple hosts first ready",
+			hosts:          []string{"host1:4000", "host2:4000", "host3:4000"},
+			healthResults:  []error{nil},
+			expectedResult: true,
+			expectedIndex:  0,
+		},
+		{
+			name:           "Failover to second host",
+			hosts:          []string{"host1:4000", "host2:4000", "host3:4000"},
+			healthResults:  []error{errors.New("not synced"), nil},
+			expectedResult: true,
+			expectedIndex:  1,
+		},
+		{
+			name:           "Failover to third host",
+			hosts:          []string{"host1:4000", "host2:4000", "host3:4000"},
+			healthResults:  []error{errors.New("not synced"), errors.New("not synced"), nil},
+			expectedResult: true,
+			expectedIndex:  2,
+		},
+		{
+			name:           "All hosts down",
+			hosts:          []string{"host1:4000", "host2:4000", "host3:4000"},
+			healthResults:  []error{errors.New("not synced"), errors.New("not synced"), errors.New("not synced")},
+			expectedResult: false,
+			expectedIndex:  2,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			ctrl := gomock.NewController(t)
+
+			mockProvider := &grpcutil.MockGrpcProvider{
+				MockHosts: tt.hosts,
+			}
+			conn, err := validatorHelpers.NewNodeConnection(
+				validatorHelpers.WithGRPCProvider(mockProvider),
+			)
+			require.NoError(t, err)
+
+			mockNodeClient := mock2.NewMockNodeClient(ctrl)
+			for _, healthErr := range tt.healthResults {
+				if healthErr != nil {
+					mockNodeClient.EXPECT().GetHealth(gomock.Any(), gomock.Any()).Return(nil, healthErr)
+				} else {
+					mockNodeClient.EXPECT().GetHealth(gomock.Any(), gomock.Any()).Return(&emptypb.Empty{}, nil)
+				}
+			}
+
+			client := &grpcValidatorClient{
+				grpcClientManager: newGrpcClientManager(conn, func(_ grpc.ClientConnInterface) eth.BeaconNodeValidatorClient {
+					return mock2.NewMockBeaconNodeValidatorClient(ctrl)
+				}),
+				nodeClient: &grpcNodeClient{
+					grpcClientManager: newGrpcClientManager(conn, func(_ grpc.ClientConnInterface) eth.NodeClient {
+						return mockNodeClient
+					}),
+				},
+			}
+
+			result := client.EnsureReady(t.Context())
+			assert.Equal(t, tt.expectedResult, result)
+			assert.Equal(t, tt.expectedIndex, mockProvider.CurrentIndex)
+		})
+	}
+}

validator/client/health_monitor.go

@@ -49,7 +49,7 @@ func (m *healthMonitor) IsHealthy() bool {
 }
 
 func (m *healthMonitor) performHealthCheck() {
-	ishealthy := m.v.FindHealthyHost(m.ctx)
+	ishealthy := m.v.EnsureReady(m.ctx)
 	m.Lock()
 	defer m.Unlock()
 	if ishealthy {
@@ -58,22 +58,30 @@ func (m *healthMonitor) performHealthCheck() {
 		log.WithFields(logrus.Fields{
 			"fails":    m.fails,
 			"maxFails": m.maxFails,
+			"url":      m.v.Host(),
 		}).Warn("Failed health check, beacon node is unresponsive")
 		m.fails++
 	} else if m.maxFails > 0 && m.fails >= m.maxFails {
-		log.WithField("maxFails", m.maxFails).Warn("Maximum health checks reached. Stopping health check routine")
+		log.WithFields(logrus.Fields{
+			"maxFails": m.maxFails,
+			"url":      m.v.Host(),
+		}).Warn("Maximum health checks reached. Stopping health check routine")
 		m.isHealthy = ishealthy
 		m.cancel()
 		return
 	}
 	if ishealthy == m.isHealthy {
 		// is not a new status so skip update
-		log.WithField("isHealthy", m.isHealthy).Debug("Health status did not change")
+		log.WithFields(logrus.Fields{
+			"isHealthy": m.isHealthy,
+			"url":       m.v.Host(),
+		}).Debug("Health status did not change")
 		return
 	}
 	log.WithFields(logrus.Fields{
-		"healthy":    ishealthy,
-		"previously": m.isHealthy,
+		"current":  ishealthy,
+		"previous": m.isHealthy,
+		"url":      m.v.Host(),
 	}).Info("Health status changed")
 	m.isHealthy = ishealthy
 	go m.healthEventFeed.Send(ishealthy) // non blocking send

validator/client/health_monitor_test.go

@@ -25,8 +25,9 @@ func TestHealthMonitor_IsHealthy_Concurrency(t *testing.T) {
 	parentCtx, parentCancel := context.WithTimeout(context.Background(), 500*time.Millisecond)
 	t.Cleanup(parentCancel)
 
-	// Expectation for newHealthMonitor's FindHealthyHost call
-	mockValidator.EXPECT().FindHealthyHost(gomock.Any()).Return(true).Times(1)
+	// Expectation for newHealthMonitor's EnsureReady call
+	mockValidator.EXPECT().EnsureReady(gomock.Any()).Return(true).Times(1)
+	mockValidator.EXPECT().Host().Return("http://localhost:3500").AnyTimes()
 
 	monitor := newHealthMonitor(parentCtx, parentCancel, 3, mockValidator)
 	require.NotNil(t, monitor)
@@ -64,81 +65,81 @@ func TestHealthMonitor_PerformHealthCheck(t *testing.T) {
 	mockValidator := validatormock.NewMockValidator(ctrl)
 
 	tests := []struct {
-		expectStatusUpdate     bool // true if healthyCh should receive a new, different status
-		expectCancelCalled     bool
-		expectedIsHealthy      bool
-		findHealthyHostReturns bool
-		initialIsHealthy       bool
-		expectedFails          int
-		maxFails               int
-		initialFails           int
-		name                   string
+		expectStatusUpdate bool // true if healthyCh should receive a new, different status
+		expectCancelCalled bool
+		expectedIsHealthy  bool
+		ensureReadyReturns bool
+		initialIsHealthy   bool
+		expectedFails      int
+		maxFails           int
+		initialFails       int
+		name               string
 	}{
 		{
-			name:                   "Becomes Unhealthy",
-			initialIsHealthy:       true,
-			initialFails:           0,
-			maxFails:               3,
-			findHealthyHostReturns: false,
-			expectedIsHealthy:      false,
-			expectedFails:          1,
-			expectCancelCalled:     false,
-			expectStatusUpdate:     true,
+			name:               "Becomes Unhealthy",
+			initialIsHealthy:   true,
+			initialFails:       0,
+			maxFails:           3,
+			ensureReadyReturns: false,
+			expectedIsHealthy:  false,
+			expectedFails:      1,
+			expectCancelCalled: false,
+			expectStatusUpdate: true,
 		},
 		{
-			name:                   "Becomes Healthy",
-			initialIsHealthy:       false,
-			initialFails:           1,
-			maxFails:               3,
-			findHealthyHostReturns: true,
-			expectedIsHealthy:      true,
-			expectedFails:          0,
-			expectCancelCalled:     false,
-			expectStatusUpdate:     true,
+			name:               "Becomes Healthy",
+			initialIsHealthy:   false,
+			initialFails:       1,
+			maxFails:           3,
+			ensureReadyReturns: true,
+			expectedIsHealthy:  true,
+			expectedFails:      0,
+			expectCancelCalled: false,
+			expectStatusUpdate: true,
 		},
 		{
-			name:                   "Remains Healthy",
-			initialIsHealthy:       true,
-			initialFails:           0,
-			maxFails:               3,
-			findHealthyHostReturns: true,
-			expectedIsHealthy:      true,
-			expectedFails:          0,
-			expectCancelCalled:     false,
-			expectStatusUpdate:     false, // Status did not change
+			name:               "Remains Healthy",
+			initialIsHealthy:   true,
+			initialFails:       0,
+			maxFails:           3,
+			ensureReadyReturns: true,
+			expectedIsHealthy:  true,
+			expectedFails:      0,
+			expectCancelCalled: false,
+			expectStatusUpdate: false, // Status did not change
 		},
 		{
-			name:                   "Remains Unhealthy",
-			initialIsHealthy:       false,
-			initialFails:           1,
-			maxFails:               3,
-			findHealthyHostReturns: false,
-			expectedIsHealthy:      false,
-			expectedFails:          2,
-			expectCancelCalled:     false,
-			expectStatusUpdate:     false, // Status did not change
+			name:               "Remains Unhealthy",
+			initialIsHealthy:   false,
+			initialFails:       1,
+			maxFails:           3,
+			ensureReadyReturns: false,
+			expectedIsHealthy:  false,
+			expectedFails:      2,
+			expectCancelCalled: false,
+			expectStatusUpdate: false, // Status did not change
 		},
 		{
-			name:                   "Max Fails Reached - Stays Unhealthy and Cancels",
-			initialIsHealthy:       false,
-			initialFails:           2, // One fail away from maxFails
-			maxFails:               2,
-			findHealthyHostReturns: false,
-			expectedIsHealthy:      false,
-			expectedFails:          2,
-			expectCancelCalled:     true,
-			expectStatusUpdate:     false, // Status was already false, no new update sent before cancel
+			name:               "Max Fails Reached - Stays Unhealthy and Cancels",
+			initialIsHealthy:   false,
+			initialFails:       2, // One fail away from maxFails
+			maxFails:           2,
+			ensureReadyReturns: false,
+			expectedIsHealthy:  false,
+			expectedFails:      2,
+			expectCancelCalled: true,
+			expectStatusUpdate: false, // Status was already false, no new update sent before cancel
 		},
 		{
-			name:                   "MaxFails is 0 - Remains Unhealthy, No Cancel",
-			initialIsHealthy:       false,
-			initialFails:           100, // Arbitrarily high
-			maxFails:               0,   // Infinite
-			findHealthyHostReturns: false,
-			expectedIsHealthy:      false,
-			expectedFails:          100,
-			expectCancelCalled:     false,
-			expectStatusUpdate:     false,
+			name:               "MaxFails is 0 - Remains Unhealthy, No Cancel",
+			initialIsHealthy:   false,
+			initialFails:       100, // Arbitrarily high
+			maxFails:           0,   // Infinite
+			ensureReadyReturns: false,
+			expectedIsHealthy:  false,
+			expectedFails:      100,
+			expectCancelCalled: false,
+			expectStatusUpdate: false,
 		},
 	}
 
@@ -163,7 +164,8 @@ func TestHealthMonitor_PerformHealthCheck(t *testing.T) {
 			}
 			monitor.healthEventFeed.Subscribe(monitor.healthyCh)
 
-			mockValidator.EXPECT().FindHealthyHost(gomock.Any()).Return(tt.findHealthyHostReturns)
+			mockValidator.EXPECT().EnsureReady(gomock.Any()).Return(tt.ensureReadyReturns)
+			mockValidator.EXPECT().Host().Return("http://localhost:3500").AnyTimes()
 
 			monitor.performHealthCheck()
 
@@ -218,12 +220,14 @@ func TestHealthMonitor_HealthyChan_ReceivesUpdates(t *testing.T) {
 	ch := monitor.HealthyChan()
 	require.NotNil(t, ch)
 
+	mockValidator.EXPECT().Host().Return("http://localhost:3500").AnyTimes()
+
 	first := mockValidator.EXPECT().
-		FindHealthyHost(gomock.Any()).
+		EnsureReady(gomock.Any()).
 		Return(true).Times(1)
 
 	mockValidator.EXPECT().
-		FindHealthyHost(gomock.Any()).
+		EnsureReady(gomock.Any()).
 		Return(false).
 		AnyTimes().
 		After(first)

validator/client/iface/validator.go

@@ -69,7 +69,7 @@ type Validator interface {
 	SetGraffiti(ctx context.Context, pubKey [fieldparams.BLSPubkeyLength]byte, graffiti []byte) error
 	DeleteGraffiti(ctx context.Context, pubKey [fieldparams.BLSPubkeyLength]byte) error
 	Host() string
-	FindHealthyHost(ctx context.Context) bool
+	EnsureReady(ctx context.Context) bool
 	SetTicker()
 }
 

validator/client/iface/validator_client.go

@@ -152,5 +152,5 @@ type ValidatorClient interface {
 	AggregatedSelections(ctx context.Context, selections []BeaconCommitteeSelection) ([]BeaconCommitteeSelection, error)
 	AggregatedSyncSelections(ctx context.Context, selections []SyncCommitteeSelection) ([]SyncCommitteeSelection, error)
 	Host() string
-	SwitchHost(host string)
+	EnsureReady(ctx context.Context) bool
 }

validator/client/runner.go

@@ -94,7 +94,7 @@ func (r *runner) run(ctx context.Context) {
 			return // Exit if context is canceled.
 		case slot := <-v.NextSlot():
 			if !r.healthMonitor.IsHealthy() {
-				log.Warn("Beacon node unhealthy, stopping runner")
+				log.WithField("url", r.validator.Host()).Warn("Beacon node unhealthy, stopping runner")
 				return
 			}
 

validator/client/service.go

@@ -207,7 +207,6 @@ func (v *ValidatorService) Start() {
 		graffitiStruct:                 v.graffitiStruct,
 		graffitiOrderedIndex:           graffitiOrderedIndex,
 		conn:                           v.conn,
-		currentHostIndex:               0,
 		validatorClient:                validatorClient,
 		chainClient:                    beaconChainClientFactory.NewChainClient(v.conn),
 		nodeClient:                     nodeclientfactory.NewNodeClient(v.conn),
@@ -247,7 +246,7 @@ func (v *ValidatorService) Start() {
 		case isHealthy := <-hm.HealthyChan():
 			if !isHealthy {
 				// wait until the next health tracker update
-				log.Warn("Validator service health check failed, waiting for healthy beacon node...")
+				log.WithField("url", v.validator.Host()).Warn("Validator service health check failed, waiting for healthy beacon node...")
 				continue
 			}
 

validator/client/testutil/mock_validator.go

@@ -23,7 +23,7 @@ var _ iface.Validator = (*FakeValidator)(nil)
 
 // FakeValidator for mocking.
 type FakeValidator struct {
-	CanChangeHost                     bool
+	IsReady                           bool
 	LogValidatorGainsAndLossesCalled  bool
 	SaveProtectionsCalled             bool
 	DeleteProtectionCalled            bool
@@ -330,8 +330,8 @@ func (*FakeValidator) Host() string {
 	return "127.0.0.1:0"
 }
 
-func (fv *FakeValidator) FindHealthyHost(_ context.Context) bool {
-	return fv.CanChangeHost
+func (fv *FakeValidator) EnsureReady(_ context.Context) bool {
+	return fv.IsReady
 }
 
 func (fv *FakeValidator) SetTicker() {

validator/client/validator-client-factory/validator_client_factory.go

@@ -13,7 +13,7 @@ func NewValidatorClient(
 	opt ...beaconApi.ValidatorClientOpt,
 ) iface.ValidatorClient {
 	if features.Get().EnableBeaconRESTApi {
-		return beaconApi.NewBeaconApiValidatorClient(validatorConn.GetRestHandler(), opt...)
+		return beaconApi.NewBeaconApiValidatorClient(validatorConn.GetRestConnectionProvider(), opt...)
 	}
 	return grpcApi.NewGrpcValidatorClient(validatorConn)
 }