add log for committee index on electra attesation (#14993)

* adding log in the case of debugging

* gaz

changelog/james-prysm_committee-index-log.md

@@ -0,0 +1,3 @@
+### Added
+
+- add log to committee index when committeebits are not the expected length of 1

proto/prysm/v1alpha1/BUILD.bazel

@@ -333,6 +333,7 @@ go_library(
     srcs = [
         "attestation.go",
         "beacon_block.go",
+        "log.go",
         "cloners.go",
         "eip_7521.go",
         "sync_committee_mainnet.go",
@@ -373,6 +374,8 @@ go_library(
         "@org_golang_google_protobuf//runtime/protoimpl:go_default_library",
         "@org_golang_google_protobuf//types/descriptorpb:go_default_library",
         "@org_golang_google_protobuf//types/known/emptypb:go_default_library",
+        "@com_github_sirupsen_logrus//:go_default_library",
+        "@com_github_sirupsen_logrus//hooks/test:go_default_library",
     ],
 )
 

proto/prysm/v1alpha1/attestation.go

@@ -291,6 +291,8 @@ func (a *AttestationElectra) GetCommitteeIndex() primitives.CommitteeIndex {
 	indices := a.CommitteeBits.BitIndices()
 	if len(indices) == 0 {
 		return 0
+	} else if len(indices) != 1 {
+		log.WithField("indices", a.CommitteeBits).Debugf("expected 1 committee bit indice got %d", len(indices))
 	}
 	return primitives.CommitteeIndex(uint64(indices[0]))
 }

proto/prysm/v1alpha1/log.go

@@ -0,0 +1,6 @@
+package eth
+
+import "github.com/sirupsen/logrus"
+
+var logger = logrus.StandardLogger()
+var log = logger.WithField("prefix", "protobuf")