Remove Fulu block and state. (#14905)

* Remove Fulu block and state.

* Add missing tests.

* Alias `ProtobufBeaconStateFulu` to `ProtobufBeaconStateElectra`

validator/client/beacon-api/BUILD.bazel

@@ -98,6 +98,7 @@ go_test(
         "propose_beacon_block_blinded_capella_test.go",
         "propose_beacon_block_blinded_deneb_test.go",
         "propose_beacon_block_blinded_electra_test.go",
+        "propose_beacon_block_blinded_fulu_test.go",
         "propose_beacon_block_capella_test.go",
         "propose_beacon_block_deneb_test.go",
         "propose_beacon_block_electra_test.go",

validator/client/beacon-api/propose_beacon_block_blinded_fulu_test.go

@@ -0,0 +1,50 @@
+package beacon_api
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"testing"
+
+	"github.com/prysmaticlabs/prysm/v5/api/server/structs"
+	rpctesting "github.com/prysmaticlabs/prysm/v5/beacon-chain/rpc/eth/shared/testing"
+	"github.com/prysmaticlabs/prysm/v5/testing/assert"
+	"github.com/prysmaticlabs/prysm/v5/testing/require"
+	"github.com/prysmaticlabs/prysm/v5/validator/client/beacon-api/mock"
+	"go.uber.org/mock/gomock"
+)
+
+func TestProposeBeaconBlock_BlindedFulu(t *testing.T) {
+	ctrl := gomock.NewController(t)
+	defer ctrl.Finish()
+	jsonRestHandler := mock.NewMockJsonRestHandler(ctrl)
+
+	var block structs.SignedBlindedBeaconBlockFulu
+	err := json.Unmarshal([]byte(rpctesting.BlindedFuluBlock), &block)
+	require.NoError(t, err)
+	genericSignedBlock, err := block.ToGeneric()
+	require.NoError(t, err)
+
+	fuluBytes, err := json.Marshal(block)
+	require.NoError(t, err)
+	// Make sure that what we send in the POST body is the marshalled version of the protobuf block
+	headers := map[string]string{"Eth-Consensus-Version": "fulu"}
+	jsonRestHandler.EXPECT().Post(
+		gomock.Any(),
+		"/eth/v2/beacon/blinded_blocks",
+		headers,
+		bytes.NewBuffer(fuluBytes),
+		nil,
+	)
+
+	validatorClient := &beaconApiValidatorClient{jsonRestHandler: jsonRestHandler}
+	proposeResponse, err := validatorClient.proposeBeaconBlock(context.Background(), genericSignedBlock)
+	assert.NoError(t, err)
+	require.NotNil(t, proposeResponse)
+
+	expectedBlockRoot, err := genericSignedBlock.GetBlindedFulu().HashTreeRoot()
+	require.NoError(t, err)
+
+	// Make sure that the block root is set
+	assert.DeepEqual(t, expectedBlockRoot[:], proposeResponse.BlockRoot)
+}