Implement process attestation

beacon-chain/core/altair/BUILD.bazel

@@ -20,6 +20,7 @@ go_library(
         "//beacon-chain/core/blocks:go_default_library",
         "//beacon-chain/core/epoch:go_default_library",
         "//beacon-chain/core/epoch/precompute:go_default_library",
+        "//beacon-chain/core/gloas:go_default_library",
         "//beacon-chain/core/helpers:go_default_library",
         "//beacon-chain/core/signing:go_default_library",
         "//beacon-chain/core/time:go_default_library",

beacon-chain/core/altair/attestation.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/blocks"
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/gloas"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/helpers"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/time"
 	"github.com/OffchainLabs/prysm/v7/beacon-chain/state"
@@ -16,6 +17,7 @@ import (
 	"github.com/OffchainLabs/prysm/v7/monitoring/tracing/trace"
 	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
 	"github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1/attestation"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
 	"github.com/pkg/errors"
 )
 
@@ -75,7 +77,12 @@ func ProcessAttestationNoVerifySignature(
 		return nil, err
 	}
 
-	return SetParticipationAndRewardProposer(ctx, beaconState, att.GetData().Target.Epoch, indices, participatedFlags, totalBalance)
+	beaconState, err = gloas.UpdatePendingPaymentWeight(beaconState, att, indices, participatedFlags)
+	if err != nil {
+		return nil, err
+	}
+
+	return SetParticipationAndRewardProposer(ctx, beaconState, att.GetData().Target.Epoch, indices, participatedFlags, totalBalance, att)
 }
 
 // SetParticipationAndRewardProposer retrieves and sets the epoch participation bits in state. Based on the epoch participation, it rewards
@@ -105,7 +112,9 @@ func SetParticipationAndRewardProposer(
 	beaconState state.BeaconState,
 	targetEpoch primitives.Epoch,
 	indices []uint64,
-	participatedFlags map[uint8]bool, totalBalance uint64) (state.BeaconState, error) {
+	participatedFlags map[uint8]bool,
+	totalBalance uint64,
+	att ethpb.Att) (state.BeaconState, error) {
 	var proposerRewardNumerator uint64
 	currentEpoch := time.CurrentEpoch(beaconState)
 	var stateErr error
@@ -299,6 +308,40 @@ func AttestationParticipationFlagIndices(beaconState state.ReadOnlyBeaconState,
 		participatedFlags[targetFlagIndex] = true
 	}
 	matchedSrcTgtHead := matchedHead && matchedSrcTgt
+
+	// Spec v1.6.1 (pseudocode excerpt):
+	//
+	//	# [New in Gloas:EIP7732]
+	//	if is_attestation_same_slot(state, data):
+	//	    assert data.index == 0
+	//	    payload_matches = True
+	//	else:
+	//	    slot_index = data.slot % SLOTS_PER_HISTORICAL_ROOT
+	//	    payload_index = state.execution_payload_availability[slot_index]
+	//	    payload_matches = data.index == payload_index
+	//
+	//	# [Modified in Gloas:EIP7732]
+	//	is_matching_head = is_matching_target and head_root_matches and payload_matches
+	var matchingPayload bool
+	if beaconState.Version() >= version.Gloas {
+		sameSlot, err := gloas.SameSlotAttestation(beaconState, [32]byte(data.BeaconBlockRoot), data.Slot)
+		if err != nil {
+			return nil, err
+		}
+		if sameSlot {
+			if data.CommitteeIndex != 0 {
+				return nil, fmt.Errorf("committee index %d for same slot attestation must be 0", data.CommitteeIndex)
+			}
+			matchingPayload = true
+		} else {
+			executionPayloadAvail, err := beaconState.ExecutionPayloadAvailability(data.Slot)
+			if err != nil {
+				return nil, err
+			}
+			matchingPayload = executionPayloadAvail == uint64(data.CommitteeIndex)
+		}
+		matchedSrcTgtHead = matchedSrcTgtHead && matchingPayload
+	}
 	if matchedSrcTgtHead && delay == cfg.MinAttestationInclusionDelay {
 		participatedFlags[headFlagIndex] = true
 	}

beacon-chain/core/altair/attestation_test.go

@@ -1,7 +1,9 @@
 package altair_test
 
 import (
+	"bytes"
 	"fmt"
+	"reflect"
 	"testing"
 
 	"github.com/OffchainLabs/go-bitfield"
@@ -556,7 +558,7 @@ func TestSetParticipationAndRewardProposer(t *testing.T) {
 
 			b, err := helpers.TotalActiveBalance(beaconState)
 			require.NoError(t, err)
-			st, err := altair.SetParticipationAndRewardProposer(t.Context(), beaconState, test.epoch, test.indices, test.participatedFlags, b)
+			st, err := altair.SetParticipationAndRewardProposer(t.Context(), beaconState, test.epoch, test.indices, test.participatedFlags, b, &ethpb.Attestation{})
 			require.NoError(t, err)
 
 			i, err := helpers.BeaconProposerIndex(t.Context(), st)
@@ -775,11 +777,67 @@ func TestAttestationParticipationFlagIndices(t *testing.T) {
 				headFlagIndex:   true,
 			},
 		},
+		{
+			name: "gloas same-slot committee index non-zero errors",
+			inputState: func() state.BeaconState {
+				stateSlot := primitives.Slot(5)
+				slot := primitives.Slot(3)
+				targetRoot := bytes.Repeat([]byte{0xAA}, 32)
+				headRoot := bytes.Repeat([]byte{0xBB}, 32)
+				prevRoot := bytes.Repeat([]byte{0xCC}, 32)
+				return buildGloasStateForFlags(t, stateSlot, slot, targetRoot, headRoot, prevRoot, 0, 0)
+			}(),
+			inputData: &ethpb.AttestationData{
+				Slot:            3,
+				CommitteeIndex:  1, // invalid for same-slot
+				BeaconBlockRoot: bytes.Repeat([]byte{0xBB}, 32),
+				Source:          &ethpb.Checkpoint{Root: bytes.Repeat([]byte{0xDD}, 32)},
+				Target: &ethpb.Checkpoint{
+					Epoch: 0,
+					Root:  bytes.Repeat([]byte{0xAA}, 32),
+				},
+			},
+			inputDelay:           1,
+			participationIndices: nil,
+		},
+		{
+			name: "gloas payload availability matches committee index",
+			inputState: func() state.BeaconState {
+				stateSlot := primitives.Slot(5)
+				slot := primitives.Slot(3)
+				targetRoot := bytes.Repeat([]byte{0xAA}, 32)
+				headRoot := bytes.Repeat([]byte{0xBB}, 32)
+				// Same prev root to make SameSlotAttestation false and use payload availability.
+				return buildGloasStateForFlags(t, stateSlot, slot, targetRoot, headRoot, headRoot, 1, slot)
+			}(),
+			inputData: &ethpb.AttestationData{
+				Slot:            3,
+				CommitteeIndex:  1,
+				BeaconBlockRoot: bytes.Repeat([]byte{0xBB}, 32),
+				Source:          &ethpb.Checkpoint{Root: bytes.Repeat([]byte{0xDD}, 32)},
+				Target: &ethpb.Checkpoint{
+					Epoch: 0,
+					Root:  bytes.Repeat([]byte{0xAA}, 32),
+				},
+			},
+			inputDelay: 1,
+			participationIndices: map[uint8]bool{
+				sourceFlagIndex: true,
+				targetFlagIndex: true,
+				headFlagIndex:   true,
+			},
+		},
 	}
 	for _, test := range tests {
 		flagIndices, err := altair.AttestationParticipationFlagIndices(test.inputState, test.inputData, test.inputDelay)
+		if test.participationIndices == nil {
+			require.ErrorContains(t, "committee index", err)
+			continue
+		}
 		require.NoError(t, err)
-		require.DeepEqual(t, test.participationIndices, flagIndices)
+		if !reflect.DeepEqual(test.participationIndices, flagIndices) {
+			t.Fatalf("unexpected participation indices: got %v want %v", flagIndices, test.participationIndices)
+		}
 	}
 }
 
@@ -858,3 +916,61 @@ func TestMatchingStatus(t *testing.T) {
 		require.Equal(t, test.matchedHead, head)
 	}
 }
+
+func buildGloasStateForFlags(t *testing.T, stateSlot, slot primitives.Slot, targetRoot, headRoot, prevRoot []byte, availabilityBit uint8, availabilitySlot primitives.Slot) state.BeaconState {
+	t.Helper()
+
+	cfg := params.BeaconConfig()
+	blockRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	blockRoots[0] = targetRoot
+	blockRoots[slot%cfg.SlotsPerHistoricalRoot] = headRoot
+	blockRoots[(slot-1)%cfg.SlotsPerHistoricalRoot] = prevRoot
+
+	stateRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	for i := range stateRoots {
+		stateRoots[i] = make([]byte, fieldparams.RootLength)
+	}
+	randaoMixes := make([][]byte, cfg.EpochsPerHistoricalVector)
+	for i := range randaoMixes {
+		randaoMixes[i] = make([]byte, fieldparams.RootLength)
+	}
+
+	execPayloadAvailability := make([]byte, cfg.SlotsPerHistoricalRoot/8)
+	idx := availabilitySlot % cfg.SlotsPerHistoricalRoot
+	byteIndex := idx / 8
+	bitIndex := idx % 8
+	if availabilityBit == 1 {
+		execPayloadAvailability[byteIndex] |= 1 << bitIndex
+	}
+
+	checkpointRoot := bytes.Repeat([]byte{0xDD}, fieldparams.RootLength)
+	justified := &ethpb.Checkpoint{Root: checkpointRoot}
+
+	stProto := &ethpb.BeaconStateGloas{
+		Slot:                         stateSlot,
+		GenesisValidatorsRoot:        bytes.Repeat([]byte{0x11}, fieldparams.RootLength),
+		BlockRoots:                   blockRoots,
+		StateRoots:                   stateRoots,
+		RandaoMixes:                  randaoMixes,
+		ExecutionPayloadAvailability: execPayloadAvailability,
+		CurrentJustifiedCheckpoint:   justified,
+		PreviousJustifiedCheckpoint:  justified,
+		Validators: []*ethpb.Validator{
+			{
+				EffectiveBalance:      cfg.MinActivationBalance,
+				WithdrawalCredentials: append([]byte{cfg.ETH1AddressWithdrawalPrefixByte}, bytes.Repeat([]byte{0x01}, 31)...),
+			},
+		},
+		Balances:               []uint64{cfg.MinActivationBalance},
+		BuilderPendingPayments: make([]*ethpb.BuilderPendingPayment, cfg.SlotsPerEpoch*2),
+		Fork: &ethpb.Fork{
+			CurrentVersion:  bytes.Repeat([]byte{0x01}, 4),
+			PreviousVersion: bytes.Repeat([]byte{0x01}, 4),
+			Epoch:           0,
+		},
+	}
+
+	beaconState, err := state_native.InitializeFromProtoGloas(stProto)
+	require.NoError(t, err)
+	return beaconState
+}

beacon-chain/core/blocks/attestation.go

@@ -111,7 +111,16 @@ func VerifyAttestationNoVerifySignature(
 	var indexedAtt ethpb.IndexedAtt
 
 	if att.Version() >= version.Electra {
-		if att.GetData().CommitteeIndex != 0 {
+		// Spec v1.6.1 (pseudocode excerpt):
+		//
+		//	# [Modified in Gloas:EIP7732]
+		//	assert data.index < 2
+		//
+		if beaconState.Version() >= version.Gloas {
+			if att.GetData().CommitteeIndex >= 2 {
+				return fmt.Errorf("incorrect committee index %d", att.GetData().CommitteeIndex)
+			}
+		} else if att.GetData().CommitteeIndex != 0 {
 			return errors.New("committee index must be 0 post-Electra")
 		}
 

beacon-chain/core/blocks/attestation_test.go

@@ -1,6 +1,7 @@
 package blocks_test
 
 import (
+	"bytes"
 	"context"
 	"testing"
 
@@ -314,6 +315,75 @@ func TestVerifyAttestationNoVerifySignature_Electra(t *testing.T) {
 	})
 }
 
+func TestVerifyAttestationNoVerifySignature_GloasCommitteeIndexLimit(t *testing.T) {
+	cfg := params.BeaconConfig()
+	stateSlot := cfg.MinAttestationInclusionDelay + 1
+
+	blockRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	for i := range blockRoots {
+		blockRoots[i] = make([]byte, fieldparams.RootLength)
+	}
+	stateRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	for i := range stateRoots {
+		stateRoots[i] = make([]byte, fieldparams.RootLength)
+	}
+	randaoMixes := make([][]byte, cfg.EpochsPerHistoricalVector)
+	for i := range randaoMixes {
+		randaoMixes[i] = make([]byte, fieldparams.RootLength)
+	}
+
+	checkpointRoot := bytes.Repeat([]byte{0xAA}, fieldparams.RootLength)
+	justified := &ethpb.Checkpoint{Epoch: 0, Root: checkpointRoot}
+
+	gloasStateProto := &ethpb.BeaconStateGloas{
+		Slot:                         stateSlot,
+		GenesisValidatorsRoot:        bytes.Repeat([]byte{0x11}, fieldparams.RootLength),
+		BlockRoots:                   blockRoots,
+		StateRoots:                   stateRoots,
+		RandaoMixes:                  randaoMixes,
+		ExecutionPayloadAvailability: make([]byte, cfg.SlotsPerHistoricalRoot/8),
+		CurrentJustifiedCheckpoint:   justified,
+		PreviousJustifiedCheckpoint:  justified,
+		Validators: []*ethpb.Validator{
+			{
+				EffectiveBalance:      cfg.MinActivationBalance,
+				WithdrawalCredentials: append([]byte{cfg.ETH1AddressWithdrawalPrefixByte}, bytes.Repeat([]byte{0x01}, 31)...),
+			},
+		},
+		Balances:               []uint64{cfg.MinActivationBalance},
+		BuilderPendingPayments: make([]*ethpb.BuilderPendingPayment, cfg.SlotsPerEpoch*2),
+		Fork: &ethpb.Fork{
+			CurrentVersion:  bytes.Repeat([]byte{0x01}, 4),
+			PreviousVersion: bytes.Repeat([]byte{0x01}, 4),
+			Epoch:           0,
+		},
+	}
+
+	beaconState, err := state_native.InitializeFromProtoGloas(gloasStateProto)
+	require.NoError(t, err)
+
+	committeeBits := bitfield.NewBitvector64()
+	committeeBits.SetBitAt(0, true)
+	aggBits := bitfield.NewBitlist(1)
+	aggBits.SetBitAt(0, true)
+
+	att := &ethpb.AttestationElectra{
+		Data: &ethpb.AttestationData{
+			Slot:            0,
+			CommitteeIndex:  2, // invalid for Gloas (must be <2)
+			BeaconBlockRoot: blockRoots[0],
+			Source:          justified,
+			Target:          justified,
+		},
+		AggregationBits: aggBits,
+		CommitteeBits:   committeeBits,
+		Signature:       bytes.Repeat([]byte{0x00}, fieldparams.BLSSignatureLength),
+	}
+
+	err = blocks.VerifyAttestationNoVerifySignature(context.TODO(), beaconState, att)
+	assert.ErrorContains(t, "incorrect committee index 2", err)
+}
+
 func TestConvertToIndexed_OK(t *testing.T) {
 	helpers.ClearCache()
 	validators := make([]*ethpb.Validator, 2*params.BeaconConfig().SlotsPerEpoch)
@@ -583,6 +653,7 @@ func TestVerifyAttestations_HandlesPlannedFork(t *testing.T) {
 }
 
 func TestRetrieveAttestationSignatureSet_VerifiesMultipleAttestations(t *testing.T) {
+	helpers.ClearCache()
 	ctx := t.Context()
 	numOfValidators := uint64(params.BeaconConfig().SlotsPerEpoch.Mul(4))
 	validators := make([]*ethpb.Validator, numOfValidators)
@@ -590,17 +661,25 @@ func TestRetrieveAttestationSignatureSet_VerifiesMultipleAttestations(t *testing
 	require.NoError(t, err)
 	for i := range validators {
 		validators[i] = &ethpb.Validator{
-			ExitEpoch:             params.BeaconConfig().FarFutureEpoch,
-			PublicKey:             keys[i].PublicKey().Marshal(),
-			WithdrawalCredentials: make([]byte, 32),
+			ExitEpoch:                  params.BeaconConfig().FarFutureEpoch,
+			PublicKey:                  keys[i].PublicKey().Marshal(),
+			WithdrawalCredentials:      make([]byte, 32),
+			EffectiveBalance:           params.BeaconConfig().MaxEffectiveBalance,
+			ActivationEligibilityEpoch: 0,
+			ActivationEpoch:            0,
 		}
 	}
+	balances := make([]uint64, numOfValidators)
+	for i := range balances {
+		balances[i] = uint64(params.BeaconConfig().MaxEffectiveBalance)
+	}
 
 	t.Run("pre-Electra", func(t *testing.T) {
 		st, err := util.NewBeaconState()
 		require.NoError(t, err)
 		require.NoError(t, st.SetSlot(5))
 		require.NoError(t, st.SetValidators(validators))
+		require.NoError(t, st.SetBalances(balances))
 
 		comm1, err := helpers.BeaconCommitteeFromState(t.Context(), st, 1 /*slot*/, 0 /*committeeIndex*/)
 		require.NoError(t, err)
@@ -650,6 +729,7 @@ func TestRetrieveAttestationSignatureSet_VerifiesMultipleAttestations(t *testing
 		require.NoError(t, err)
 		require.NoError(t, st.SetSlot(5))
 		require.NoError(t, st.SetValidators(validators))
+		require.NoError(t, st.SetBalances(balances))
 
 		comm1, err := helpers.BeaconCommitteeFromState(t.Context(), st, 1 /*slot*/, 0 /*committeeIndex*/)
 		require.NoError(t, err)

beacon-chain/core/gloas/BUILD.bazel

@@ -0,0 +1,31 @@
+load("@prysm//tools/go:def.bzl", "go_library", "go_test")
+
+go_library(
+    name = "go_default_library",
+    srcs = ["attestation.go"],
+    importpath = "github.com/OffchainLabs/prysm/v7/beacon-chain/core/gloas",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//beacon-chain/core/helpers:go_default_library",
+        "//beacon-chain/state:go_default_library",
+        "//config/params:go_default_library",
+        "//consensus-types/primitives:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
+        "//runtime/version:go_default_library",
+        "//time/slots:go_default_library",
+    ],
+)
+
+go_test(
+    name = "go_default_test",
+    srcs = ["attestation_test.go"],
+    embed = [":go_default_library"],
+    deps = [
+        "//beacon-chain/state/state-native:go_default_library",
+        "//config/params:go_default_library",
+        "//consensus-types/primitives:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
+        "//testing/require:go_default_library",
+        "//time/slots:go_default_library",
+    ],
+)

beacon-chain/core/gloas/attestation.go

@@ -0,0 +1,144 @@
+package gloas
+
+import (
+	"bytes"
+
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/helpers"
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/state"
+	"github.com/OffchainLabs/prysm/v7/config/params"
+	"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/time/slots"
+)
+
+// SameSlotAttestation checks if the attestation is for the same slot as the block root in the state.
+// Spec v1.6.1 (pseudocode excerpt):
+//
+//	is_attestation_same_slot(state, data):
+//	    block_root_at_slot = get_block_root_at_slot(state, data.slot)
+//	    block_root_at_prev_slot = get_block_root_at_slot(state, data.slot - 1)
+//	    return block_root_at_slot == data.beacon_block_root and block_root_at_prev_slot != data.beacon_block_root
+func SameSlotAttestation(state state.ReadOnlyBeaconState, blockRoot [32]byte, slot primitives.Slot) (bool, error) {
+	if slot == 0 {
+		return true, nil
+	}
+
+	blockRootAtSlot, err := helpers.BlockRootAtSlot(state, slot)
+	if err != nil {
+		return false, err
+	}
+	matchingBlockRoot := bytes.Equal(blockRoot[:], blockRootAtSlot)
+
+	blockRootAtPrevSlot, err := helpers.BlockRootAtSlot(state, slot-1)
+	if err != nil {
+		return false, err
+	}
+	matchingPrevBlockRoot := bytes.Equal(blockRoot[:], blockRootAtPrevSlot)
+
+	return matchingBlockRoot && !matchingPrevBlockRoot, nil
+}
+
+// UpdatePendingPaymentWeight updates the builder pending payment weight based on attestation participation.
+// Spec v1.6.1 (pseudocode excerpt):
+//
+//	if data.target.epoch == get_current_epoch(state):
+//	    epoch_participation = state.current_epoch_participation
+//	    payment = state.builder_pending_payments[SLOTS_PER_EPOCH + data.slot % SLOTS_PER_EPOCH]
+//	else:
+//	    epoch_participation = state.previous_epoch_participation
+//	    payment = state.builder_pending_payments[data.slot % SLOTS_PER_EPOCH]
+//
+//	for index in get_attesting_indices(state, attestation):
+//	    will_set_new_flag = False
+//	    for flag_index, weight in enumerate(PARTICIPATION_FLAG_WEIGHTS):
+//	        if flag_index in participation_flag_indices and not has_flag(epoch_participation[index], flag_index):
+//	            epoch_participation[index] = add_flag(epoch_participation[index], flag_index)
+//	            proposer_reward_numerator += get_base_reward(state, index) * weight
+//	            will_set_new_flag = True
+//	    if will_set_new_flag and is_attestation_same_slot(state, data) and payment.withdrawal.amount > 0:
+//	        payment.weight += state.validators[index].effective_balance
+//
+//	if current_epoch_target:
+//	    state.builder_pending_payments[SLOTS_PER_EPOCH + data.slot % SLOTS_PER_EPOCH] = payment
+//	else:
+//	    state.builder_pending_payments[data.slot % SLOTS_PER_EPOCH] = payment
+func UpdatePendingPaymentWeight(beaconState state.BeaconState, att ethpb.Att, indices []uint64, participatedFlags map[uint8]bool) (state.BeaconState, error) {
+	if beaconState.Version() < version.Gloas {
+		return beaconState, nil
+	}
+
+	data := att.GetData()
+	epoch := slots.ToEpoch(beaconState.Slot())
+
+	isSameSlot, err := SameSlotAttestation(beaconState, [32]byte(data.BeaconBlockRoot), data.Slot)
+	if err != nil {
+		return nil, err
+	}
+	if !isSameSlot {
+		return beaconState, nil
+	}
+
+	slotsPerEpoch := params.BeaconConfig().SlotsPerEpoch
+	var (
+		paymentSlot        primitives.Slot
+		payment            *ethpb.BuilderPendingPayment
+		epochParticipation []byte
+	)
+	if data.Target.Epoch == epoch {
+		paymentSlot = slotsPerEpoch + (data.Slot % slotsPerEpoch)
+		payment, err = beaconState.BuilderPendingPayment(uint64(paymentSlot))
+		if err != nil {
+			return nil, err
+		}
+		epochParticipation, err = beaconState.CurrentEpochParticipation()
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		paymentSlot = data.Slot % slotsPerEpoch
+		payment, err = beaconState.BuilderPendingPayment(uint64(paymentSlot))
+		if err != nil {
+			return nil, err
+		}
+		epochParticipation, err = beaconState.PreviousEpochParticipation()
+		if err != nil {
+			return nil, err
+		}
+	}
+	if payment.Withdrawal.Amount == 0 {
+		return beaconState, nil
+	}
+
+	cfg := params.BeaconConfig()
+	flagIndices := []uint8{cfg.TimelySourceFlagIndex, cfg.TimelyTargetFlagIndex, cfg.TimelyHeadFlagIndex}
+	hasNewFlag := func(idx uint64) bool {
+		participation := epochParticipation[idx]
+		for _, f := range flagIndices {
+			if !participatedFlags[f] {
+				continue
+			}
+			if participation&(1<<f) == 0 {
+				return true
+			}
+		}
+		return false
+	}
+
+	for _, idx := range indices {
+		if !hasNewFlag(idx) {
+			continue
+		}
+		validator, err := beaconState.ValidatorAtIndex(primitives.ValidatorIndex(idx))
+		if err != nil {
+			return nil, err
+		}
+		payment.Weight += primitives.Gwei(validator.EffectiveBalance)
+	}
+
+	if err := beaconState.SetBuilderPendingPayment(uint64(paymentSlot), payment); err != nil {
+		return nil, err
+	}
+
+	return beaconState, nil
+}

beacon-chain/core/gloas/attestation_test.go

@@ -0,0 +1,286 @@
+package gloas
+
+import (
+	"bytes"
+	"testing"
+
+	state_native "github.com/OffchainLabs/prysm/v7/beacon-chain/state/state-native"
+	"github.com/OffchainLabs/prysm/v7/config/params"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/testing/require"
+	"github.com/OffchainLabs/prysm/v7/time/slots"
+)
+
+func buildStateWithBlockRoots(t *testing.T, stateSlot primitives.Slot, roots map[primitives.Slot][]byte) *state_native.BeaconState {
+	t.Helper()
+
+	cfg := params.BeaconConfig()
+	blockRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	for slot, root := range roots {
+		blockRoots[slot%cfg.SlotsPerHistoricalRoot] = root
+	}
+
+	stateRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	for i := range stateRoots {
+		stateRoots[i] = bytes.Repeat([]byte{0x11}, 32)
+	}
+
+	randaoMixes := make([][]byte, cfg.EpochsPerHistoricalVector)
+	for i := range randaoMixes {
+		randaoMixes[i] = bytes.Repeat([]byte{0x22}, 32)
+	}
+
+	execPayloadAvailability := make([]byte, cfg.SlotsPerHistoricalRoot/8)
+
+	stProto := &ethpb.BeaconStateGloas{
+		Slot:                  stateSlot,
+		GenesisValidatorsRoot: bytes.Repeat([]byte{0x33}, 32),
+		Fork: &ethpb.Fork{
+			CurrentVersion:  bytes.Repeat([]byte{0x44}, 4),
+			PreviousVersion: bytes.Repeat([]byte{0x44}, 4),
+			Epoch:           0,
+		},
+		BlockRoots:                   blockRoots,
+		StateRoots:                   stateRoots,
+		RandaoMixes:                  randaoMixes,
+		ExecutionPayloadAvailability: execPayloadAvailability,
+		Validators:                   []*ethpb.Validator{},
+		Balances:                     []uint64{},
+		BuilderPendingPayments:       make([]*ethpb.BuilderPendingPayment, cfg.SlotsPerEpoch*2),
+		BuilderPendingWithdrawals:    []*ethpb.BuilderPendingWithdrawal{},
+	}
+
+	state, err := state_native.InitializeFromProtoGloas(stProto)
+	require.NoError(t, err)
+	return state.(*state_native.BeaconState)
+}
+
+func TestSameSlotAttestation(t *testing.T) {
+	rootA := bytes.Repeat([]byte{0xAA}, 32)
+	rootB := bytes.Repeat([]byte{0xBB}, 32)
+	rootC := bytes.Repeat([]byte{0xCC}, 32)
+
+	tests := []struct {
+		name      string
+		stateSlot primitives.Slot
+		slot      primitives.Slot
+		blockRoot []byte
+		roots     map[primitives.Slot][]byte
+		want      bool
+	}{
+		{
+			name:      "slot zero always true",
+			stateSlot: 1,
+			slot:      0,
+			blockRoot: rootA,
+			roots:     map[primitives.Slot][]byte{},
+			want:      true,
+		},
+		{
+			name:      "matching current different previous",
+			stateSlot: 6,
+			slot:      4,
+			blockRoot: rootA,
+			roots: map[primitives.Slot][]byte{
+				4: rootA,
+				3: rootB,
+			},
+			want: true,
+		},
+		{
+			name:      "matching current same previous",
+			stateSlot: 6,
+			slot:      4,
+			blockRoot: rootA,
+			roots: map[primitives.Slot][]byte{
+				4: rootA,
+				3: rootA,
+			},
+			want: false,
+		},
+		{
+			name:      "non matching current",
+			stateSlot: 6,
+			slot:      4,
+			blockRoot: rootC,
+			roots: map[primitives.Slot][]byte{
+				4: rootA,
+				3: rootB,
+			},
+			want: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			state := buildStateWithBlockRoots(t, tt.stateSlot, tt.roots)
+			var rootArr [32]byte
+			copy(rootArr[:], tt.blockRoot)
+
+			got, err := SameSlotAttestation(state, rootArr, tt.slot)
+			require.NoError(t, err)
+			require.Equal(t, tt.want, got)
+		})
+	}
+}
+
+func buildStateForPaymentTest(t *testing.T, stateSlot primitives.Slot, paymentIdx int, amount primitives.Gwei, weight primitives.Gwei, roots map[primitives.Slot][]byte) *state_native.BeaconState {
+	t.Helper()
+
+	cfg := params.BeaconConfig()
+	blockRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	for slot, root := range roots {
+		blockRoots[slot%cfg.SlotsPerHistoricalRoot] = root
+	}
+
+	stateRoots := make([][]byte, cfg.SlotsPerHistoricalRoot)
+	for i := range stateRoots {
+		stateRoots[i] = bytes.Repeat([]byte{0x44}, 32)
+	}
+	randaoMixes := make([][]byte, cfg.EpochsPerHistoricalVector)
+	for i := range randaoMixes {
+		randaoMixes[i] = bytes.Repeat([]byte{0x55}, 32)
+	}
+
+	validator := &ethpb.Validator{
+		PublicKey:             bytes.Repeat([]byte{0x01}, 48),
+		WithdrawalCredentials: append([]byte{cfg.ETH1AddressWithdrawalPrefixByte}, bytes.Repeat([]byte{0x02}, 31)...),
+		EffectiveBalance:      cfg.MinActivationBalance,
+	}
+
+	payments := make([]*ethpb.BuilderPendingPayment, cfg.SlotsPerEpoch*2)
+	for i := range payments {
+		payments[i] = &ethpb.BuilderPendingPayment{
+			Withdrawal: &ethpb.BuilderPendingWithdrawal{
+				FeeRecipient: make([]byte, 20),
+			},
+		}
+	}
+	payments[paymentIdx] = &ethpb.BuilderPendingPayment{
+		Weight: weight,
+		Withdrawal: &ethpb.BuilderPendingWithdrawal{
+			FeeRecipient: make([]byte, 20),
+			Amount:       amount,
+		},
+	}
+
+	execPayloadAvailability := make([]byte, cfg.SlotsPerHistoricalRoot/8)
+
+	stProto := &ethpb.BeaconStateGloas{
+		Slot:                         stateSlot,
+		GenesisValidatorsRoot:        bytes.Repeat([]byte{0x33}, 32),
+		BlockRoots:                   blockRoots,
+		StateRoots:                   stateRoots,
+		RandaoMixes:                  randaoMixes,
+		ExecutionPayloadAvailability: execPayloadAvailability,
+		Validators:                   []*ethpb.Validator{validator},
+		Balances:                     []uint64{cfg.MinActivationBalance},
+		CurrentEpochParticipation:    []byte{0},
+		PreviousEpochParticipation:   []byte{0},
+		BuilderPendingPayments:       payments,
+		Fork: &ethpb.Fork{
+			CurrentVersion:  bytes.Repeat([]byte{0x66}, 4),
+			PreviousVersion: bytes.Repeat([]byte{0x66}, 4),
+			Epoch:           0,
+		},
+	}
+
+	state, err := state_native.InitializeFromProtoGloas(stProto)
+	require.NoError(t, err)
+	return state.(*state_native.BeaconState)
+}
+
+func TestUpdatePendingPaymentWeight(t *testing.T) {
+	cfg := params.BeaconConfig()
+	slotsPerEpoch := cfg.SlotsPerEpoch
+	slot := primitives.Slot(4)
+	stateSlot := slot + 1
+	currentEpoch := slots.ToEpoch(stateSlot)
+
+	rootA := bytes.Repeat([]byte{0xAA}, 32)
+	rootB := bytes.Repeat([]byte{0xBB}, 32)
+
+	tests := []struct {
+		name          string
+		targetEpoch   primitives.Epoch
+		blockRoot     []byte
+		initialAmount primitives.Gwei
+		initialWeight primitives.Gwei
+		wantWeight    primitives.Gwei
+	}{
+		{
+			name:          "same slot current epoch adds weight",
+			targetEpoch:   currentEpoch,
+			blockRoot:     rootA,
+			initialAmount: 10,
+			initialWeight: 0,
+			wantWeight:    primitives.Gwei(cfg.MinActivationBalance),
+		},
+		{
+			name:          "same slot zero amount no weight change",
+			targetEpoch:   currentEpoch,
+			blockRoot:     rootA,
+			initialAmount: 0,
+			initialWeight: 5,
+			wantWeight:    5,
+		},
+		{
+			name:          "non matching block root no change",
+			targetEpoch:   currentEpoch,
+			blockRoot:     rootB,
+			initialAmount: 10,
+			initialWeight: 7,
+			wantWeight:    7,
+		},
+		{
+			name:          "previous epoch target uses earlier slot",
+			targetEpoch:   currentEpoch - 1,
+			blockRoot:     rootA,
+			initialAmount: 20,
+			initialWeight: 0,
+			wantWeight:    primitives.Gwei(cfg.MinActivationBalance),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var paymentIdx int
+			if tt.targetEpoch == currentEpoch {
+				paymentIdx = int(slotsPerEpoch + (slot % slotsPerEpoch))
+			} else {
+				paymentIdx = int(slot % slotsPerEpoch)
+			}
+			state := buildStateForPaymentTest(t, stateSlot, paymentIdx, tt.initialAmount, tt.initialWeight, map[primitives.Slot][]byte{
+				slot:     tt.blockRoot,
+				slot - 1: rootB,
+			})
+
+			att := &ethpb.Attestation{
+				Data: &ethpb.AttestationData{
+					Slot:            slot,
+					CommitteeIndex:  0,
+					BeaconBlockRoot: tt.blockRoot,
+					Source:          &ethpb.Checkpoint{},
+					Target: &ethpb.Checkpoint{
+						Epoch: tt.targetEpoch,
+					},
+				},
+			}
+
+			participatedFlags := map[uint8]bool{
+				cfg.TimelySourceFlagIndex: true,
+				cfg.TimelyTargetFlagIndex: true,
+				cfg.TimelyHeadFlagIndex:   true,
+			}
+			indices := []uint64{0}
+
+			gotState, err := UpdatePendingPaymentWeight(state, att, indices, participatedFlags)
+			require.NoError(t, err)
+
+			payment, err := gotState.BuilderPendingPayment(uint64(paymentIdx))
+			require.NoError(t, err)
+			require.Equal(t, tt.wantWeight, payment.Weight)
+		})
+	}
+}

beacon-chain/state/BUILD.bazel

@@ -5,6 +5,7 @@ go_library(
     srcs = [
         "error.go",
         "interfaces.go",
+        "interfaces_gloas.go",
         "prometheus.go",
     ],
     importpath = "github.com/OffchainLabs/prysm/v7/beacon-chain/state",

beacon-chain/state/interfaces.go

@@ -66,6 +66,7 @@ type ReadOnlyBeaconState interface {
 	ReadOnlyDeposits
 	ReadOnlyConsolidations
 	ReadOnlyProposerLookahead
+	readOnlyGloasFields
 	ToProtoUnsafe() any
 	ToProto() any
 	GenesisTime() time.Time
@@ -101,6 +102,7 @@ type WriteOnlyBeaconState interface {
 	WriteOnlyWithdrawals
 	WriteOnlyDeposits
 	WriteOnlyProposerLookahead
+	writeOnlyGloasFields
 	SetGenesisTime(val time.Time) error
 	SetGenesisValidatorsRoot(val []byte) error
 	SetSlot(val primitives.Slot) error

beacon-chain/state/interfaces_gloas.go

@@ -0,0 +1,15 @@
+package state
+
+import (
+	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+)
+
+type writeOnlyGloasFields interface {
+	SetBuilderPendingPayment(index uint64, payment *ethpb.BuilderPendingPayment) error
+}
+
+type readOnlyGloasFields interface {
+	BuilderPendingPayment(index uint64) (*ethpb.BuilderPendingPayment, error)
+	ExecutionPayloadAvailability(slot primitives.Slot) (uint64, error)
+}

beacon-chain/state/state-native/BUILD.bazel

@@ -14,6 +14,7 @@ go_library(
         "getters_deposits.go",
         "getters_eth1.go",
         "getters_exit.go",
+        "getters_gloas.go",
         "getters_misc.go",
         "getters_participation.go",
         "getters_payload_header.go",
@@ -36,6 +37,7 @@ go_library(
         "setters_deposit_requests.go",
         "setters_deposits.go",
         "setters_eth1.go",
+        "setters_gloas.go",
         "setters_misc.go",
         "setters_participation.go",
         "setters_payload_header.go",
@@ -97,6 +99,7 @@ go_test(
         "getters_deposit_requests_test.go",
         "getters_deposits_test.go",
         "getters_exit_test.go",
+        "getters_gloas_test.go",
         "getters_participation_test.go",
         "getters_setters_lookahead_test.go",
         "getters_test.go",
@@ -114,6 +117,7 @@ go_test(
         "setters_deposit_requests_test.go",
         "setters_deposits_test.go",
         "setters_eth1_test.go",
+        "setters_gloas_test.go",
         "setters_misc_test.go",
         "setters_participation_test.go",
         "setters_payload_header_test.go",

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

@@ -0,0 +1,42 @@
+package state_native
+
+import (
+	"github.com/OffchainLabs/prysm/v7/config/params"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/primitives"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
+)
+
+// BuilderPendingPayment returns the builder pending payment for the given index.
+func (b *BeaconState) BuilderPendingPayment(index uint64) (*ethpb.BuilderPendingPayment, error) {
+	if b.version < version.Gloas {
+		return nil, errNotSupported("BuilderPendingPayment", b.version)
+	}
+
+	b.lock.RLock()
+	defer b.lock.RUnlock()
+
+	return ethpb.CopyBuilderPendingPayment(b.builderPendingPayments[index]), nil
+}
+
+// ExecutionPayloadAvailability returns the execution payload availability bit for the given slot.
+func (b *BeaconState) ExecutionPayloadAvailability(slot primitives.Slot) (uint64, error) {
+	if b.version < version.Gloas {
+		return 0, errNotSupported("ExecutionPayloadAvailability", b.version)
+	}
+
+	b.lock.RLock()
+	defer b.lock.RUnlock()
+
+	if b.executionPayloadAvailability == nil {
+		return 0, nil
+	}
+
+	slotIndex := slot % params.BeaconConfig().SlotsPerHistoricalRoot
+	byteIndex := slotIndex / 8
+	bitIndex := slotIndex % 8
+
+	bit := (b.executionPayloadAvailability[byteIndex] >> bitIndex) & 1
+
+	return uint64(bit), nil
+}

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

@@ -0,0 +1,38 @@
+package state_native
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v7/config/params"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
+	"github.com/OffchainLabs/prysm/v7/testing/require"
+)
+
+func TestBuilderPendingPayment_ReturnsCopy(t *testing.T) {
+	slotsPerEpoch := params.BeaconConfig().SlotsPerEpoch
+	payments := make([]*ethpb.BuilderPendingPayment, 2*slotsPerEpoch)
+	target := uint64(slotsPerEpoch + 1)
+	payments[target] = &ethpb.BuilderPendingPayment{Weight: 10}
+
+	st, err := InitializeFromProtoUnsafeGloas(&ethpb.BeaconStateGloas{
+		BuilderPendingPayments: payments,
+	})
+	require.NoError(t, err)
+
+	payment, err := st.BuilderPendingPayment(target)
+	require.NoError(t, err)
+
+	// mutate returned copy
+	payment.Weight = 99
+
+	original, err := st.BuilderPendingPayment(target)
+	require.NoError(t, err)
+	require.Equal(t, uint64(10), uint64(original.Weight))
+}
+
+func TestBuilderPendingPayment_UnsupportedVersion(t *testing.T) {
+	st := &BeaconState{version: version.Electra}
+	_, err := st.BuilderPendingPayment(0)
+	require.ErrorContains(t, "BuilderPendingPayment", err)
+}

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

@@ -0,0 +1,22 @@
+package state_native
+
+import (
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/state/state-native/types"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
+)
+
+// SetBuilderPendingPayment sets a builder pending payment at the specified slot.
+func (b *BeaconState) SetBuilderPendingPayment(index uint64, payment *ethpb.BuilderPendingPayment) error {
+	if b.version < version.Gloas {
+		return errNotSupported("SetBuilderPendingPayment", b.version)
+	}
+
+	b.lock.Lock()
+	defer b.lock.Unlock()
+
+	b.builderPendingPayments[index] = ethpb.CopyBuilderPendingPayment(payment)
+
+	b.markFieldAsDirty(types.BuilderPendingPayments)
+	return nil
+}

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

@@ -0,0 +1,35 @@
+package state_native
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v7/config/params"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
+	"github.com/OffchainLabs/prysm/v7/testing/require"
+)
+
+func TestSetBuilderPendingPayment_CopiesValue(t *testing.T) {
+	slotsPerEpoch := params.BeaconConfig().SlotsPerEpoch
+	payments := make([]*ethpb.BuilderPendingPayment, 2*slotsPerEpoch)
+	st, err := InitializeFromProtoUnsafeGloas(&ethpb.BeaconStateGloas{
+		BuilderPendingPayments: payments,
+	})
+	require.NoError(t, err)
+
+	payment := &ethpb.BuilderPendingPayment{Weight: 123}
+	target := uint64(1)
+	require.NoError(t, st.SetBuilderPendingPayment(target, payment))
+
+	payment.Weight = 999
+
+	got, err := st.BuilderPendingPayment(target)
+	require.NoError(t, err)
+	require.Equal(t, uint64(123), uint64(got.Weight))
+}
+
+func TestSetBuilderPendingPayment_UnsupportedVersion(t *testing.T) {
+	st := &BeaconState{version: version.Electra}
+	err := st.SetBuilderPendingPayment(0, &ethpb.BuilderPendingPayment{})
+	require.ErrorContains(t, "SetBuilderPendingPayment", err)
+}

changelog/t_gloas-process-attestations.md

@@ -0,0 +1,3 @@
+### Added
+
+- Added basic Gloas builder support (`Builder` message and `BeaconStateGloas` `builders`/`next_withdrawal_builder_index` fields)

proto/prysm/v1alpha1/cloners.go

@@ -189,3 +189,28 @@ func copyBeaconBlockBodyGloas(body *BeaconBlockBodyGloas) *BeaconBlockBodyGloas
 
 	return copied
 }
+
+// CopyBuilderPendingPayment creates a deep copy of a builder pending payment.
+func CopyBuilderPendingPayment(original *BuilderPendingPayment) *BuilderPendingPayment {
+	if original == nil {
+		return nil
+	}
+
+	return &BuilderPendingPayment{
+		Weight:     original.Weight,
+		Withdrawal: copyBuilderPendingWithdrawal(original.Withdrawal),
+	}
+}
+
+// copyBuilderPendingWithdrawal creates a deep copy of a builder pending withdrawal.
+func copyBuilderPendingWithdrawal(original *BuilderPendingWithdrawal) *BuilderPendingWithdrawal {
+	if original == nil {
+		return nil
+	}
+
+	return &BuilderPendingWithdrawal{
+		FeeRecipient: bytesutil.SafeCopyBytes(original.FeeRecipient),
+		Amount:       original.Amount,
+		BuilderIndex: original.BuilderIndex,
+	}
+}

proto/prysm/v1alpha1/cloners_test.go

@@ -356,6 +356,64 @@ func TestCopyBlindedBeaconBlockBodyDeneb(t *testing.T) {
 	assert.NotEmpty(t, bb, "Copied blinded beacon block body Deneb has empty fields")
 }
 
+func TestCopyBuilderPendingPayment(t *testing.T) {
+	t.Run("nil payment", func(t *testing.T) {
+		if got := v1alpha1.CopyBuilderPendingPayment(nil); got != nil {
+			t.Fatalf("CopyBuilderPendingPayment(nil) = %v, want nil", got)
+		}
+	})
+
+	t.Run("nil withdrawal", func(t *testing.T) {
+		original := &v1alpha1.BuilderPendingPayment{
+			Weight: primitives.Gwei(1),
+		}
+
+		copied := v1alpha1.CopyBuilderPendingPayment(original)
+		if copied == original {
+			t.Fatal("expected CopyBuilderPendingPayment to return a new pointer")
+		}
+		if !reflect.DeepEqual(copied, original) {
+			t.Fatalf("CopyBuilderPendingPayment() = %v, want %v", copied, original)
+		}
+		if copied.Withdrawal != nil {
+			t.Fatalf("CopyBuilderPendingPayment() withdrawal = %v, want nil", copied.Withdrawal)
+		}
+	})
+
+	t.Run("deep copy", func(t *testing.T) {
+		original := &v1alpha1.BuilderPendingPayment{
+			Weight: primitives.Gwei(2500),
+			Withdrawal: &v1alpha1.BuilderPendingWithdrawal{
+				FeeRecipient: []byte("fee_recipient_20_byt"),
+				Amount:       primitives.Gwei(10000),
+				BuilderIndex: primitives.BuilderIndex(789),
+			},
+		}
+
+		copied := v1alpha1.CopyBuilderPendingPayment(original)
+		if copied == original {
+			t.Fatal("expected CopyBuilderPendingPayment to return a new pointer")
+		}
+		if copied.Withdrawal == original.Withdrawal {
+			t.Fatal("expected nested Withdrawal to be copied")
+		}
+		if !reflect.DeepEqual(copied, original) {
+			t.Fatalf("CopyBuilderPendingPayment() = %v, want %v", copied, original)
+		}
+
+		want := proto.Clone(copied).(*v1alpha1.BuilderPendingPayment)
+
+		original.Weight++
+		original.Withdrawal.Amount++
+		original.Withdrawal.BuilderIndex++
+		original.Withdrawal.FeeRecipient[0] ^= 0xFF
+
+		if !reflect.DeepEqual(copied, want) {
+			t.Fatalf("copied payment mutated after changing source: got %v, want %v", copied, want)
+		}
+	})
+}
+
 func bytes(length int) []byte {
 	b := make([]byte, length)
 	for i := range length {

testing/spectest/mainnet/BUILD.bazel

@@ -200,6 +200,7 @@ go_test(
         "fulu__sanity__blocks_test.go",
         "fulu__sanity__slots_test.go",
         "fulu__ssz_static__ssz_static_test.go",
+        "gloas__operations__attestation_test.go",
         "gloas__ssz_static__ssz_static_test.go",
         "phase0__epoch_processing__effective_balance_updates_test.go",
         "phase0__epoch_processing__epoch_processing_test.go",
@@ -278,6 +279,7 @@ go_test(
         "//testing/spectest/shared/fulu/rewards:go_default_library",
         "//testing/spectest/shared/fulu/sanity:go_default_library",
         "//testing/spectest/shared/fulu/ssz_static:go_default_library",
+        "//testing/spectest/shared/gloas/operations:go_default_library",
         "//testing/spectest/shared/gloas/ssz_static:go_default_library",
         "//testing/spectest/shared/phase0/epoch_processing:go_default_library",
         "//testing/spectest/shared/phase0/finality:go_default_library",

testing/spectest/mainnet/gloas__operations__attestation_test.go

@@ -0,0 +1,11 @@
+package mainnet
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v7/testing/spectest/shared/gloas/operations"
+)
+
+func TestMainnet_Gloas_Operations_Attestation(t *testing.T) {
+	operations.RunAttestationTest(t, "mainnet")
+}

testing/spectest/minimal/BUILD.bazel

@@ -206,6 +206,7 @@ go_test(
         "fulu__sanity__blocks_test.go",
         "fulu__sanity__slots_test.go",
         "fulu__ssz_static__ssz_static_test.go",
+        "gloas__operations__attestation_test.go",
         "gloas__ssz_static__ssz_static_test.go",
         "phase0__epoch_processing__effective_balance_updates_test.go",
         "phase0__epoch_processing__epoch_processing_test.go",
@@ -288,6 +289,7 @@ go_test(
         "//testing/spectest/shared/fulu/rewards:go_default_library",
         "//testing/spectest/shared/fulu/sanity:go_default_library",
         "//testing/spectest/shared/fulu/ssz_static:go_default_library",
+        "//testing/spectest/shared/gloas/operations:go_default_library",
         "//testing/spectest/shared/gloas/ssz_static:go_default_library",
         "//testing/spectest/shared/phase0/epoch_processing:go_default_library",
         "//testing/spectest/shared/phase0/finality:go_default_library",

testing/spectest/minimal/gloas__operations__attestation_test.go

@@ -0,0 +1,11 @@
+package minimal
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v7/testing/spectest/shared/gloas/operations"
+)
+
+func TestMinimal_Gloas_Operations_Attestation(t *testing.T) {
+	operations.RunAttestationTest(t, "minimal")
+}

testing/spectest/shared/gloas/operations/BUILD.bazel

@@ -0,0 +1,22 @@
+load("@prysm//tools/go:def.bzl", "go_library")
+
+go_library(
+    name = "go_default_library",
+    testonly = True,
+    srcs = [
+        "attestation.go",
+        "helpers.go",
+    ],
+    importpath = "github.com/OffchainLabs/prysm/v7/testing/spectest/shared/gloas/operations",
+    visibility = ["//visibility:public"],
+    deps = [
+        "//beacon-chain/core/altair:go_default_library",
+        "//beacon-chain/state:go_default_library",
+        "//beacon-chain/state/state-native:go_default_library",
+        "//consensus-types/blocks:go_default_library",
+        "//consensus-types/interfaces:go_default_library",
+        "//proto/prysm/v1alpha1:go_default_library",
+        "//runtime/version:go_default_library",
+        "//testing/spectest/shared/common/operations:go_default_library",
+    ],
+)

testing/spectest/shared/gloas/operations/attestation.go

@@ -0,0 +1,26 @@
+package operations
+
+import (
+	"testing"
+
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/core/altair"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/interfaces"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/runtime/version"
+	common "github.com/OffchainLabs/prysm/v7/testing/spectest/shared/common/operations"
+)
+
+func blockWithAttestation(attestationSSZ []byte) (interfaces.SignedBeaconBlock, error) {
+	att := &ethpb.AttestationElectra{}
+	if err := att.UnmarshalSSZ(attestationSSZ); err != nil {
+		return nil, err
+	}
+	b := &ethpb.BeaconBlockGloas{}
+	b.Body = &ethpb.BeaconBlockBodyGloas{Attestations: []*ethpb.AttestationElectra{att}}
+	return blocks.NewSignedBeaconBlock(&ethpb.SignedBeaconBlockGloas{Block: b})
+}
+
+func RunAttestationTest(t *testing.T, config string) {
+	common.RunAttestationTest(t, config, version.String(version.Gloas), blockWithAttestation, altair.ProcessAttestationsNoVerifySignature, sszToState)
+}

testing/spectest/shared/gloas/operations/helpers.go

@@ -0,0 +1,33 @@
+package operations
+
+import (
+	"github.com/OffchainLabs/prysm/v7/beacon-chain/state"
+	state_native "github.com/OffchainLabs/prysm/v7/beacon-chain/state/state-native"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/blocks"
+	"github.com/OffchainLabs/prysm/v7/consensus-types/interfaces"
+	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+)
+
+func sszToState(b []byte) (state.BeaconState, error) {
+	base := &ethpb.BeaconStateGloas{}
+	if err := base.UnmarshalSSZ(b); err != nil {
+		return nil, err
+	}
+	return state_native.InitializeFromProtoGloas(base)
+}
+
+func sszToBlock(b []byte) (interfaces.SignedBeaconBlock, error) {
+	base := &ethpb.BeaconBlockGloas{}
+	if err := base.UnmarshalSSZ(b); err != nil {
+		return nil, err
+	}
+	return blocks.NewSignedBeaconBlock(&ethpb.SignedBeaconBlockGloas{Block: base})
+}
+
+func sszToBlockBody(b []byte) (interfaces.ReadOnlyBeaconBlockBody, error) {
+	base := &ethpb.BeaconBlockBodyGloas{}
+	if err := base.UnmarshalSSZ(b); err != nil {
+		return nil, err
+	}
+	return blocks.NewBeaconBlockBody(base)
+}