Add Gloas beacon state package (#15611)

* Add Gloas protobuf definitions with spec tests

Add Gloas state fields to beacon state implementation

* Remove shared field for pending payment

* Radek's feedback

* Potuz feedback

* use slice concat

* Fix comment

* Fix concat

* Fix comment

* Fix correct index

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

@@ -7,8 +7,10 @@ go_library(
     importpath = "github.com/OffchainLabs/prysm/v7/testing/spectest/shared/gloas/ssz_static",
     visibility = ["//testing/spectest:__subpackages__"],
     deps = [
+        "//beacon-chain/state/state-native:go_default_library",
         "//proto/engine/v1:go_default_library",
         "//proto/prysm/v1alpha1:go_default_library",
+        "//testing/require:go_default_library",
         "//testing/spectest/shared/common/ssz_static:go_default_library",
         "@com_github_prysmaticlabs_fastssz//:go_default_library",
     ],

testing/spectest/shared/gloas/ssz_static/ssz_static.go

@@ -1,11 +1,14 @@
 package ssz_static
 
 import (
+	"context"
 	"errors"
 	"testing"
 
+	state_native "github.com/OffchainLabs/prysm/v7/beacon-chain/state/state-native"
 	enginev1 "github.com/OffchainLabs/prysm/v7/proto/engine/v1"
 	ethpb "github.com/OffchainLabs/prysm/v7/proto/prysm/v1alpha1"
+	"github.com/OffchainLabs/prysm/v7/testing/require"
 	common "github.com/OffchainLabs/prysm/v7/testing/spectest/shared/common/ssz_static"
 	fssz "github.com/prysmaticlabs/fastssz"
 )
@@ -16,8 +19,18 @@ func RunSSZStaticTests(t *testing.T, config string) {
 }
 
 func customHtr(t *testing.T, htrs []common.HTR, object any) []common.HTR {
-	// TODO: Add custom HTR for BeaconStateGloas when state-native support is implemented
-	// For now, only use the default fastssz HTR methods
+	_, ok := object.(*ethpb.BeaconStateGloas)
+	if !ok {
+		return htrs
+	}
+
+	htrs = append(htrs, func(s any) ([32]byte, error) {
+		beaconState, err := state_native.InitializeFromProtoGloas(s.(*ethpb.BeaconStateGloas))
+		require.NoError(t, err)
+
+		return beaconState.HashTreeRoot(context.Background())
+	})
+
 	return htrs
 }