Add blob getters (prysmaticlabs#13170)

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

consensus-types/blocks/roblob.go

@@ -2,6 +2,8 @@ package blocks
 
 import (
 	"github.com/pkg/errors"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
+	"github.com/prysmaticlabs/prysm/v4/encoding/bytesutil"
 	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 )
 
@@ -40,3 +42,23 @@ func NewROBlob(b *ethpb.BlobSidecar) (ROBlob, error) {
 func (b *ROBlob) BlockRoot() [32]byte {
 	return b.root
 }
+
+// Slot returns the slot of the blob sidecar.
+func (b *ROBlob) Slot() primitives.Slot {
+	return b.SignedBlockHeader.Header.Slot
+}
+
+// ParentRoot returns the parent root of the blob sidecar.
+func (b *ROBlob) ParentRoot() [32]byte {
+	return bytesutil.ToBytes32(b.SignedBlockHeader.Header.ParentRoot)
+}
+
+// BodyRoot returns the body root of the blob sidecar.
+func (b *ROBlob) BodyRoot() [32]byte {
+	return bytesutil.ToBytes32(b.SignedBlockHeader.Header.BodyRoot)
+}
+
+// ProposerIndex returns the proposer index of the blob sidecar.
+func (b *ROBlob) ProposerIndex() primitives.ValidatorIndex {
+	return b.SignedBlockHeader.Header.ProposerIndex
+}

consensus-types/blocks/roblob_test.go

@@ -4,6 +4,7 @@ import (
 	"testing"
 
 	fieldparams "github.com/prysmaticlabs/prysm/v4/config/fieldparams"
+	"github.com/prysmaticlabs/prysm/v4/consensus-types/primitives"
 	ethpb "github.com/prysmaticlabs/prysm/v4/proto/prysm/v1alpha1"
 	"github.com/prysmaticlabs/prysm/v4/testing/assert"
 )
@@ -57,3 +58,59 @@ func TestBlockRoot(t *testing.T) {
 	}
 	assert.Equal(t, root, blob.BlockRoot())
 }
+
+func TestSlot(t *testing.T) {
+	slot := primitives.Slot(1)
+	blob := &ROBlob{
+		BlobSidecar: &ethpb.BlobSidecar{
+			SignedBlockHeader: &ethpb.SignedBeaconBlockHeader{
+				Header: &ethpb.BeaconBlockHeader{
+					Slot: slot,
+				},
+			},
+		},
+	}
+	assert.Equal(t, slot, blob.Slot())
+}
+
+func TestParentRoot(t *testing.T) {
+	root := [32]byte{1}
+	blob := &ROBlob{
+		BlobSidecar: &ethpb.BlobSidecar{
+			SignedBlockHeader: &ethpb.SignedBeaconBlockHeader{
+				Header: &ethpb.BeaconBlockHeader{
+					ParentRoot: root[:],
+				},
+			},
+		},
+	}
+	assert.Equal(t, root, blob.ParentRoot())
+}
+
+func TestBodyRoot(t *testing.T) {
+	root := [32]byte{1}
+	blob := &ROBlob{
+		BlobSidecar: &ethpb.BlobSidecar{
+			SignedBlockHeader: &ethpb.SignedBeaconBlockHeader{
+				Header: &ethpb.BeaconBlockHeader{
+					BodyRoot: root[:],
+				},
+			},
+		},
+	}
+	assert.Equal(t, root, blob.BodyRoot())
+}
+
+func TestProposeIndex(t *testing.T) {
+	index := primitives.ValidatorIndex(1)
+	blob := &ROBlob{
+		BlobSidecar: &ethpb.BlobSidecar{
+			SignedBlockHeader: &ethpb.SignedBeaconBlockHeader{
+				Header: &ethpb.BeaconBlockHeader{
+					ProposerIndex: index,
+				},
+			},
+		},
+	}
+	assert.Equal(t, index, blob.ProposerIndex())
+}