node-api: stub for get state committees

mod/node-api/engines/echo/vaildator.go

@@ -68,6 +68,7 @@ func ConstructValidator() *validator.Validate {
 		"slot":             ValidateUint64,
 		"validator_status": ValidateValidatorStatus,
 		"parent_root":      ValidateRoot,
+		"index":            ValidateUint64,
 	}
 	validate := validator.New()
 	for tag, fn := range validators {

mod/node-api/handlers/beacon/committees.go

@@ -0,0 +1,54 @@
+// SPDX-License-Identifier: BUSL-1.1
+//
+// Copyright (C) 2024, Berachain Foundation. All rights reserved.
+// Use of this software is governed by the Business Source License included
+// in the LICENSE file of this repository and at www.mariadb.com/bsl11.
+//
+// ANY USE OF THE LICENSED WORK IN VIOLATION OF THIS LICENSE WILL AUTOMATICALLY
+// TERMINATE YOUR RIGHTS UNDER THIS LICENSE FOR THE CURRENT AND ALL OTHER
+// VERSIONS OF THE LICENSED WORK.
+//
+// THIS LICENSE DOES NOT GRANT YOU ANY RIGHT IN ANY TRADEMARK OR LOGO OF
+// LICENSOR OR ITS AFFILIATES (PROVIDED THAT YOU MAY USE A TRADEMARK OR LOGO OF
+// LICENSOR AS EXPRESSLY REQUIRED BY THIS LICENSE).
+//
+// TO THE EXTENT PERMITTED BY APPLICABLE LAW, THE LICENSED WORK IS PROVIDED ON
+// AN “AS IS” BASIS. LICENSOR HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS,
+// EXPRESS OR IMPLIED, INCLUDING (WITHOUT LIMITATION) WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, NON-INFRINGEMENT, AND
+// TITLE.
+
+package beacon
+
+import (
+	beacontypes "github.com/berachain/beacon-kit/mod/node-api/handlers/beacon/types"
+	"github.com/berachain/beacon-kit/mod/node-api/handlers/types"
+	"github.com/berachain/beacon-kit/mod/node-api/handlers/utils"
+)
+
+func (h *Handler[_, ContextT, _, _, _]) GetStateCommittees(
+	c ContextT,
+) (any, error) {
+	req, err := utils.BindAndValidate[beacontypes.GetStateCommitteesRequest](
+		c, h.Logger(),
+	)
+	if err != nil {
+		return nil, err
+	}
+	slot, err := utils.SlotFromStateID(req.StateID, h.backend)
+	if err != nil {
+		return nil, err
+	}
+	// TODO : To be implemented
+	//committees, err := h.backend.CommitteesByStateID(slot)
+	//if err != nil {
+	//	return nil, err
+	//}
+
+	// Stub the response
+	return types.Wrap(beacontypes.CommitteeResponseData{
+		Index:      0,
+		Slot:       slot,
+		Validators: []uint64{0},
+	}), nil
+}

mod/node-api/handlers/beacon/routes.go

@@ -81,7 +81,7 @@ func (h *Handler[_, ContextT, _, _, _]) RegisterRoutes(
 		{
 			Method:  http.MethodGet,
 			Path:    "/eth/v1/beacon/states/:state_id/committees",
-			Handler: h.NotImplemented,
+			Handler: h.GetStateCommittees,
 		},
 		{
 			Method:  http.MethodGet,

mod/node-api/handlers/beacon/types/request.go

@@ -162,7 +162,7 @@ type EpochRequest struct {
 }
 
 type CommitteeIndexRequest struct {
-	CommitteeIndex string `query:"committee_index" validate:"committee_index"`
+	Index string `query:"index" validate:"index"`
 }
 
 type SlotRequest struct {

mod/node-api/handlers/beacon/types/response.go

@@ -27,6 +27,7 @@ import (
 
 	"github.com/berachain/beacon-kit/mod/primitives/pkg/common"
 	"github.com/berachain/beacon-kit/mod/primitives/pkg/crypto"
+	"github.com/berachain/beacon-kit/mod/primitives/pkg/math"
 )
 
 type ValidatorResponse struct {
@@ -203,3 +204,9 @@ type FinalityCheckpointsData struct {
 	CurrentJustified  common.Checkpoint `json:"current_justified"`
 	Finalized         common.Checkpoint `json:"finalized"`
 }
+
+type CommitteeResponseData struct {
+	Index      uint64    `json:"index,string"`
+	Slot       math.Slot `json:"slot,string"`
+	Validators []uint64  `json:"validators"`
+}