Update slasher service to Electra (#14812)

* Update slasher service to Electra

* Update beacon-chain/slasher/chunks.go

Co-authored-by: Manu NALEPA <[email protected]>

* Update beacon-chain/slasher/chunks_test.go

Co-authored-by: Manu NALEPA <[email protected]>

* Manu's review

* Manu's review again

---------

Co-authored-by: Manu NALEPA <[email protected]>

Author: rkapka

beacon-chain/slasher/BUILD.bazel

@@ -41,6 +41,7 @@ go_library(
         "//encoding/bytesutil:go_default_library",
         "//monitoring/tracing/trace:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//runtime/version:go_default_library",
         "//time/slots:go_default_library",
         "@com_github_pkg_errors//:go_default_library",
         "@com_github_prometheus_client_golang//prometheus:go_default_library",
@@ -83,6 +84,7 @@ go_test(
         "//crypto/bls/common:go_default_library",
         "//encoding/bytesutil:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//runtime/version:go_default_library",
         "//testing/assert:go_default_library",
         "//testing/require:go_default_library",
         "//testing/util:go_default_library",

beacon-chain/slasher/chunks.go

@@ -11,6 +11,7 @@ import (
 	slashertypes "github.com/prysmaticlabs/prysm/v5/beacon-chain/slasher/types"
 	"github.com/prysmaticlabs/prysm/v5/consensus-types/primitives"
 	ethpb "github.com/prysmaticlabs/prysm/v5/proto/prysm/v1alpha1"
+	"github.com/prysmaticlabs/prysm/v5/runtime/version"
 	"github.com/sirupsen/logrus"
 )
 
@@ -232,6 +233,43 @@ func (m *MinSpanChunksSlice) CheckSlashable(
 
 	surroundingVotesTotal.Inc()
 
+	// Both attestations should have the same type. If not, we convert both to Electra attestations.
+	unifyAttWrapperVersion(existingAttWrapper, incomingAttWrapper)
+
+	postElectra := existingAttWrapper.IndexedAttestation.Version() >= version.Electra
+	if postElectra {
+		existing, ok := existingAttWrapper.IndexedAttestation.(*ethpb.IndexedAttestationElectra)
+		if !ok {
+			return nil, fmt.Errorf(
+				"existing attestation has wrong type (expected %T, got %T)",
+				&ethpb.IndexedAttestationElectra{},
+				existingAttWrapper.IndexedAttestation,
+			)
+		}
+		incoming, ok := incomingAttWrapper.IndexedAttestation.(*ethpb.IndexedAttestationElectra)
+		if !ok {
+			return nil, fmt.Errorf(
+				"incoming attestation has wrong type (expected %T, got %T)",
+				&ethpb.IndexedAttestationElectra{},
+				incomingAttWrapper.IndexedAttestation,
+			)
+		}
+		slashing := &ethpb.AttesterSlashingElectra{
+			Attestation_1: existing,
+			Attestation_2: incoming,
+		}
+
+		// Ensure the attestation with the lower data root is the first attestation.
+		if bytes.Compare(existingAttWrapper.DataRoot[:], incomingAttWrapper.DataRoot[:]) > 0 {
+			slashing = &ethpb.AttesterSlashingElectra{
+				Attestation_1: incoming,
+				Attestation_2: existing,
+			}
+		}
+
+		return slashing, nil
+	}
+
 	existing, ok := existingAttWrapper.IndexedAttestation.(*ethpb.IndexedAttestation)
 	if !ok {
 		return nil, fmt.Errorf(
@@ -328,6 +366,43 @@ func (m *MaxSpanChunksSlice) CheckSlashable(
 
 	surroundedVotesTotal.Inc()
 
+	// Both attestations should have the same type. If not, we convert the non-Electra attestation into an Electra attestation.
+	unifyAttWrapperVersion(existingAttWrapper, incomingAttWrapper)
+
+	postElectra := existingAttWrapper.IndexedAttestation.Version() >= version.Electra
+	if postElectra {
+		existing, ok := existingAttWrapper.IndexedAttestation.(*ethpb.IndexedAttestationElectra)
+		if !ok {
+			return nil, fmt.Errorf(
+				"existing attestation has wrong type (expected %T, got %T)",
+				&ethpb.IndexedAttestationElectra{},
+				existingAttWrapper.IndexedAttestation,
+			)
+		}
+		incoming, ok := incomingAttWrapper.IndexedAttestation.(*ethpb.IndexedAttestationElectra)
+		if !ok {
+			return nil, fmt.Errorf(
+				"incoming attestation has wrong type (expected %T, got %T)",
+				&ethpb.IndexedAttestationElectra{},
+				incomingAttWrapper.IndexedAttestation,
+			)
+		}
+		slashing := &ethpb.AttesterSlashingElectra{
+			Attestation_1: existing,
+			Attestation_2: incoming,
+		}
+
+		// Ensure the attestation with the lower data root is the first attestation.
+		if bytes.Compare(existingAttWrapper.DataRoot[:], incomingAttWrapper.DataRoot[:]) > 0 {
+			slashing = &ethpb.AttesterSlashingElectra{
+				Attestation_1: incoming,
+				Attestation_2: existing,
+			}
+		}
+
+		return slashing, nil
+	}
+
 	existing, ok := existingAttWrapper.IndexedAttestation.(*ethpb.IndexedAttestation)
 	if !ok {
 		return nil, fmt.Errorf(