From f293cae4981d1982be0667125a2a1fc7201d3139 Mon Sep 17 00:00:00 2001
From: Terence Tsao <terence@prysmaticlabs.com>
Date: Mon, 25 Feb 2019 12:18:02 -0800
Subject: [PATCH 1/4] moved processiing logs to block chain service layer

---
 beacon-chain/blockchain/service.go    | 18 ++++++++++++++++--
 beacon-chain/core/state/transition.go | 10 +---------
 2 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/beacon-chain/blockchain/service.go b/beacon-chain/blockchain/service.go
index 0e06f0e4e3a..17174818226 100644
--- a/beacon-chain/blockchain/service.go
+++ b/beacon-chain/blockchain/service.go
@@ -313,8 +313,11 @@ func (c *ChainService) ReceiveBlock(block *pb.BeaconBlock, beaconState *pb.Beaco
 			true, /* sig verify */
 		)
 		if err != nil {
-			return nil, fmt.Errorf("could not execute state transition %v", err)
+			return nil, fmt.Errorf("could not execute state transition without block %v", err)
 		}
+		log.WithField(
+			"slotsSinceGenesis", beaconState.Slot-params.BeaconConfig().GenesisSlot,
+		).Info("Slot transition successfully processed")
 	}
 
 	beaconState, err = state.ExecuteStateTransition(
@@ -324,7 +327,18 @@ func (c *ChainService) ReceiveBlock(block *pb.BeaconBlock, beaconState *pb.Beaco
 		true, /* no sig verify */
 	)
 	if err != nil {
-		return nil, fmt.Errorf("could not execute state transition %v", err)
+		return nil, fmt.Errorf("could not execute state transition with block %v", err)
+	}
+	log.WithField(
+		"slotsSinceGenesis", beaconState.Slot-params.BeaconConfig().GenesisSlot,
+	).Info("Slot transition successfully processed")
+	log.WithField(
+		"slotsSinceGenesis", beaconState.Slot-params.BeaconConfig().GenesisSlot,
+	).Info("Block transition successfully processed")
+	if (beaconState.Slot+1)%params.BeaconConfig().SlotsPerEpoch == 0 {
+		log.WithField(
+			"SlotsSinceGenesis", beaconState.Slot-params.BeaconConfig().GenesisSlot,
+		).Info("Epoch transition successfully processed")
 	}
 
 	// if there exists a block for the slot being processed.
diff --git a/beacon-chain/core/state/transition.go b/beacon-chain/core/state/transition.go
index c9639b84e27..cdc4384e44f 100644
--- a/beacon-chain/core/state/transition.go
+++ b/beacon-chain/core/state/transition.go
@@ -73,9 +73,6 @@ func ExecuteStateTransition(
 func ProcessSlot(state *pb.BeaconState, headRoot [32]byte) *pb.BeaconState {
 	state.Slot++
 	state = b.ProcessBlockRoots(state, headRoot)
-	log.WithField(
-		"slotsSinceGenesis", state.Slot-params.BeaconConfig().GenesisSlot,
-	).Info("Slot transition successfully processed")
 	return state
 }
 
@@ -141,9 +138,7 @@ func ProcessBlock(state *pb.BeaconState, block *pb.BeaconBlock, verifySignatures
 	if err != nil {
 		return nil, fmt.Errorf("could not process validator exits: %v", err)
 	}
-	log.WithField(
-		"slotsSinceGenesis", state.Slot-params.BeaconConfig().GenesisSlot,
-	).Info("Block transition successfully processed")
+
 	log.WithField(
 		"attestationsInBlock", len(block.Body.Attestations),
 	).Info("Block attestations")
@@ -396,9 +391,6 @@ func ProcessEpoch(state *pb.BeaconState) (*pb.BeaconState, error) {
 
 	// Clean up processed attestations.
 	state = e.CleanupAttestations(state)
-	log.WithField(
-		"SlotsSinceGenesis", state.Slot-params.BeaconConfig().GenesisSlot,
-	).Info("Epoch transition successfully processed")
 	log.WithField(
 		"PreviousJustifiedEpoch", state.PreviousJustifiedEpoch-params.BeaconConfig().GenesisEpoch,
 	).Info("Previous justified epoch")

From 97c6fc6111fb200074af2fbf8e5171b4df7c4bed Mon Sep 17 00:00:00 2001
From: Terence Tsao <terence@prysmaticlabs.com>
Date: Wed, 27 Feb 2019 13:21:58 -0800
Subject: [PATCH 2/4] rename shard_block_root -> crosslink_data_root

---
 beacon-chain/core/blocks/block_operations.go  |   6 +-
 .../core/blocks/block_operations_test.go      |  18 +-
 beacon-chain/core/epoch/epoch_operations.go   |   2 +-
 .../core/epoch/epoch_operations_test.go       |  12 +-
 beacon-chain/core/epoch/epoch_processing.go   |   2 +-
 .../core/epoch/epoch_processing_test.go       |  10 +-
 beacon-chain/core/state/state.go              |   2 +-
 beacon-chain/core/state/transition_test.go    |  12 +-
 beacon-chain/core/validators/validator.go     |   4 +-
 .../core/validators/validator_test.go         |   4 +-
 beacon-chain/rpc/attester_server_test.go      |   6 +-
 beacon-chain/sync/regular_sync_test.go        |   6 +-
 proto/beacon/p2p/v1/types.pb.go               | 342 +++++++++---------
 proto/beacon/p2p/v1/types.proto               |   4 +-
 validator/client/validator_attest.go          |   2 +-
 validator/client/validator_attest_test.go     |  10 +-
 16 files changed, 221 insertions(+), 221 deletions(-)

diff --git a/beacon-chain/core/blocks/block_operations.go b/beacon-chain/core/blocks/block_operations.go
index 452ae8565dd..f48202e6c29 100644
--- a/beacon-chain/core/blocks/block_operations.go
+++ b/beacon-chain/core/blocks/block_operations.go
@@ -485,7 +485,7 @@ func verifyAttestation(beaconState *pb.BeaconState, att *pb.Attestation, verifyS
 	// 	equals state.latest_crosslinks[attestation.data.shard]
 	shard := att.Data.Shard
 	crosslink := &pb.Crosslink{
-		ShardBlockRootHash32: att.Data.ShardBlockRootHash32,
+		CrosslinkDataRootHash32: att.Data.CrosslinkDataRootHash32,
 		Epoch:                helpers.SlotToEpoch(att.Data.Slot),
 	}
 	crosslinkFromAttestation := att.Data.LatestCrosslink
@@ -499,11 +499,11 @@ func verifyAttestation(beaconState *pb.BeaconState, att *pb.Attestation, verifyS
 	}
 
 	// Verify attestation.shard_block_root == ZERO_HASH [TO BE REMOVED IN PHASE 1].
-	if !bytes.Equal(att.Data.ShardBlockRootHash32, params.BeaconConfig().ZeroHash[:]) {
+	if !bytes.Equal(att.Data.CrosslinkDataRootHash32, params.BeaconConfig().ZeroHash[:]) {
 		return fmt.Errorf(
 			"expected attestation.ShardBlockRoot == %#x, received %#x instead",
 			params.BeaconConfig().ZeroHash[:],
-			att.Data.ShardBlockRootHash32,
+			att.Data.CrosslinkDataRootHash32,
 		)
 	}
 	if verifySignatures {
diff --git a/beacon-chain/core/blocks/block_operations_test.go b/beacon-chain/core/blocks/block_operations_test.go
index 866ac30e14f..7262649cc98 100644
--- a/beacon-chain/core/blocks/block_operations_test.go
+++ b/beacon-chain/core/blocks/block_operations_test.go
@@ -907,7 +907,7 @@ func TestProcessBlockAttestations_CrosslinkRootFailure(t *testing.T) {
 	// the attestation should be invalid.
 	stateLatestCrosslinks := []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	state := &pb.BeaconState{
@@ -922,8 +922,8 @@ func TestProcessBlockAttestations_CrosslinkRootFailure(t *testing.T) {
 				Shard:                    0,
 				Slot:                     params.BeaconConfig().GenesisSlot + 20,
 				JustifiedBlockRootHash32: blockRoots[0],
-				LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{2}},
-				ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+				LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{2}},
+				CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 				JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			},
 		},
@@ -953,7 +953,7 @@ func TestProcessBlockAttestations_ShardBlockRootEqualZeroHashFailure(t *testing.
 	}
 	stateLatestCrosslinks := []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	state := &pb.BeaconState{
@@ -968,8 +968,8 @@ func TestProcessBlockAttestations_ShardBlockRootEqualZeroHashFailure(t *testing.
 				Shard:                    0,
 				Slot:                     params.BeaconConfig().GenesisSlot + 20,
 				JustifiedBlockRootHash32: blockRoots[0],
-				LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-				ShardBlockRootHash32:     []byte{1},
+				LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+				CrosslinkDataRootHash32:     []byte{1},
 				JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			},
 		},
@@ -1000,7 +1000,7 @@ func TestProcessBlockAttestations_CreatePendingAttestations(t *testing.T) {
 	}
 	stateLatestCrosslinks := []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	state := &pb.BeaconState{
@@ -1014,8 +1014,8 @@ func TestProcessBlockAttestations_CreatePendingAttestations(t *testing.T) {
 			Shard:                    0,
 			Slot:                     params.BeaconConfig().GenesisSlot + 20,
 			JustifiedBlockRootHash32: blockRoots[0],
-			LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 		},
 		AggregationBitfield: []byte{1},
diff --git a/beacon-chain/core/epoch/epoch_operations.go b/beacon-chain/core/epoch/epoch_operations.go
index 7b84edf1127..5bb86778c11 100644
--- a/beacon-chain/core/epoch/epoch_operations.go
+++ b/beacon-chain/core/epoch/epoch_operations.go
@@ -320,7 +320,7 @@ func winningRoot(
 
 	for _, attestation := range attestations {
 		if attestation.Data.Shard == shard {
-			candidateRoots = append(candidateRoots, attestation.Data.ShardBlockRootHash32)
+			candidateRoots = append(candidateRoots, attestation.Data.CrosslinkDataRootHash32)
 		}
 	}
 
diff --git a/beacon-chain/core/epoch/epoch_operations_test.go b/beacon-chain/core/epoch/epoch_operations_test.go
index 34ac5d827fe..fe30f080815 100644
--- a/beacon-chain/core/epoch/epoch_operations_test.go
+++ b/beacon-chain/core/epoch/epoch_operations_test.go
@@ -352,7 +352,7 @@ func TestWinningRoot_AccurateRoot(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 params.BeaconConfig().GenesisSlot,
-				ShardBlockRootHash32: []byte{byte(i + 100)},
+				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			AggregationBitfield: participationBitfield,
 		}
@@ -380,7 +380,7 @@ func TestWinningRoot_EmptyParticipantBitfield(t *testing.T) {
 	attestations := []*pb.PendingAttestation{
 		{Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot,
-			ShardBlockRootHash32: []byte{},
+			CrosslinkDataRootHash32: []byte{},
 		},
 			AggregationBitfield: []byte{},
 		},
@@ -400,7 +400,7 @@ func TestAttestingValidators_MatchActive(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 params.BeaconConfig().GenesisSlot,
-				ShardBlockRootHash32: []byte{byte(i + 100)},
+				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			AggregationBitfield: []byte{0x03},
 		}
@@ -428,7 +428,7 @@ func TestAttestingValidators_EmptyWinningRoot(t *testing.T) {
 	attestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot,
-			ShardBlockRootHash32: []byte{},
+			CrosslinkDataRootHash32: []byte{},
 		},
 		AggregationBitfield: []byte{},
 	}
@@ -449,7 +449,7 @@ func TestTotalAttestingBalance_CorrectBalance(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 params.BeaconConfig().GenesisSlot,
-				ShardBlockRootHash32: []byte{byte(i + 100)},
+				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			// All validators attested to the above roots.
 			AggregationBitfield: []byte{0x03},
@@ -477,7 +477,7 @@ func TestTotalAttestingBalance_EmptyWinningRoot(t *testing.T) {
 	attestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot,
-			ShardBlockRootHash32: []byte{},
+			CrosslinkDataRootHash32: []byte{},
 		},
 		AggregationBitfield: []byte{},
 	}
diff --git a/beacon-chain/core/epoch/epoch_processing.go b/beacon-chain/core/epoch/epoch_processing.go
index d648b6e4c1c..361f2573672 100644
--- a/beacon-chain/core/epoch/epoch_processing.go
+++ b/beacon-chain/core/epoch/epoch_processing.go
@@ -214,7 +214,7 @@ func ProcessCrosslinks(
 				}
 				state.LatestCrosslinks[shard] = &pb.Crosslink{
 					Epoch:                currentEpoch,
-					ShardBlockRootHash32: winningRoot,
+					CrosslinkDataRootHash32: winningRoot,
 				}
 			}
 		}
diff --git a/beacon-chain/core/epoch/epoch_processing_test.go b/beacon-chain/core/epoch/epoch_processing_test.go
index 476b2e99974..5b51638b9e1 100644
--- a/beacon-chain/core/epoch/epoch_processing_test.go
+++ b/beacon-chain/core/epoch/epoch_processing_test.go
@@ -257,7 +257,7 @@ func TestProcessCrosslinks_CrosslinksCorrectEpoch(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 state.Slot,
-				ShardBlockRootHash32: []byte{'A'},
+				CrosslinkDataRootHash32: []byte{'A'},
 			},
 			// All validators attested to the above roots.
 			AggregationBitfield: participationBitfield,
@@ -279,11 +279,11 @@ func TestProcessCrosslinks_CrosslinksCorrectEpoch(t *testing.T) {
 			newState.LatestCrosslinks[0].Epoch, +params.BeaconConfig().GenesisSlot)
 	}
 	// Verify crosslink for shard 0 was root hashed for []byte{'A'}.
-	if !bytes.Equal(newState.LatestCrosslinks[0].ShardBlockRootHash32,
-		attestations[0].Data.ShardBlockRootHash32) {
+	if !bytes.Equal(newState.LatestCrosslinks[0].CrosslinkDataRootHash32,
+		attestations[0].Data.CrosslinkDataRootHash32) {
 		t.Errorf("Shard 0's root hash is %#x, wanted: %#x",
-			newState.LatestCrosslinks[0].ShardBlockRootHash32,
-			attestations[0].Data.ShardBlockRootHash32)
+			newState.LatestCrosslinks[0].CrosslinkDataRootHash32,
+			attestations[0].Data.CrosslinkDataRootHash32)
 	}
 }
 
diff --git a/beacon-chain/core/state/state.go b/beacon-chain/core/state/state.go
index dfff613fdd7..6b2084f204c 100644
--- a/beacon-chain/core/state/state.go
+++ b/beacon-chain/core/state/state.go
@@ -52,7 +52,7 @@ func GenesisBeaconState(
 	for i := 0; i < len(latestCrosslinks); i++ {
 		latestCrosslinks[i] = &pb.Crosslink{
 			Epoch:                params.BeaconConfig().GenesisEpoch,
-			ShardBlockRootHash32: zeroHash,
+			CrosslinkDataRootHash32: zeroHash,
 		}
 	}
 
diff --git a/beacon-chain/core/state/transition_test.go b/beacon-chain/core/state/transition_test.go
index 8193767b136..de8a5faeee9 100644
--- a/beacon-chain/core/state/transition_test.go
+++ b/beacon-chain/core/state/transition_test.go
@@ -261,7 +261,7 @@ func TestProcessBlock_IncorrectProcessExits(t *testing.T) {
 	beaconState.LatestBlockRootHash32S = blockRoots
 	beaconState.LatestCrosslinks = []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	beaconState.Slot = params.BeaconConfig().GenesisSlot + 10
@@ -271,8 +271,8 @@ func TestProcessBlock_IncorrectProcessExits(t *testing.T) {
 			Slot:                     params.BeaconConfig().GenesisSlot,
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			JustifiedBlockRootHash32: blockRoots[0],
-			LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 		},
 		AggregationBitfield: []byte{1},
 		CustodyBitfield:     []byte{1},
@@ -353,7 +353,7 @@ func TestProcessBlock_PassesProcessingConditions(t *testing.T) {
 	beaconState.LatestBlockRootHash32S = blockRoots
 	beaconState.LatestCrosslinks = []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	beaconState.Slot = params.BeaconConfig().GenesisSlot + 10
@@ -363,8 +363,8 @@ func TestProcessBlock_PassesProcessingConditions(t *testing.T) {
 			Slot:                     params.BeaconConfig().GenesisSlot,
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			JustifiedBlockRootHash32: blockRoots[0],
-			LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 		},
 		AggregationBitfield: []byte{1},
 		CustodyBitfield:     []byte{1},
diff --git a/beacon-chain/core/validators/validator.go b/beacon-chain/core/validators/validator.go
index 4f4657113fa..ae1acf31deb 100644
--- a/beacon-chain/core/validators/validator.go
+++ b/beacon-chain/core/validators/validator.go
@@ -55,7 +55,7 @@ func ValidatorIndices(
 func AttestingValidatorIndices(
 	state *pb.BeaconState,
 	shard uint64,
-	shardBlockRoot []byte,
+	crosslinkDataRoot []byte,
 	thisEpochAttestations []*pb.PendingAttestation,
 	prevEpochAttestations []*pb.PendingAttestation) ([]uint64, error) {
 
@@ -64,7 +64,7 @@ func AttestingValidatorIndices(
 
 	for _, attestation := range attestations {
 		if attestation.Data.Shard == shard &&
-			bytes.Equal(attestation.Data.ShardBlockRootHash32, shardBlockRoot) {
+			bytes.Equal(attestation.Data.CrosslinkDataRootHash32, crosslinkDataRoot) {
 
 			validatorIndicesCommittee, err := helpers.AttestationParticipants(state, attestation.Data, attestation.AggregationBitfield)
 			if err != nil {
diff --git a/beacon-chain/core/validators/validator_test.go b/beacon-chain/core/validators/validator_test.go
index 2482de70822..adfeb607b6b 100644
--- a/beacon-chain/core/validators/validator_test.go
+++ b/beacon-chain/core/validators/validator_test.go
@@ -103,7 +103,7 @@ func TestAttestingValidatorIndices_OK(t *testing.T) {
 		Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot + 3,
 			Shard:                6,
-			ShardBlockRootHash32: []byte{'B'},
+			CrosslinkDataRootHash32: []byte{'B'},
 		},
 		AggregationBitfield: []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1},
 	}
@@ -141,7 +141,7 @@ func TestAttestingValidatorIndices_OutOfBound(t *testing.T) {
 		Data: &pb.AttestationData{
 			Slot:                 0,
 			Shard:                1,
-			ShardBlockRootHash32: []byte{'B'},
+			CrosslinkDataRootHash32: []byte{'B'},
 		},
 		AggregationBitfield: []byte{'A'}, // 01000001 = 1,7
 	}
diff --git a/beacon-chain/rpc/attester_server_test.go b/beacon-chain/rpc/attester_server_test.go
index 1cf3f97d064..08723069bd1 100644
--- a/beacon-chain/rpc/attester_server_test.go
+++ b/beacon-chain/rpc/attester_server_test.go
@@ -24,7 +24,7 @@ func TestAttestHead_OK(t *testing.T) {
 		Data: &pbp2p.AttestationData{
 			Slot:                 999,
 			Shard:                1,
-			ShardBlockRootHash32: []byte{'a'},
+			CrosslinkDataRootHash32: []byte{'a'},
 		},
 	}
 	if _, err := attesterServer.AttestHead(context.Background(), req); err != nil {
@@ -123,7 +123,7 @@ func TestAttestationInfoAtSlot_OK(t *testing.T) {
 		LatestBlockRootHash32S: make([][]byte, params.BeaconConfig().LatestBlockRootsLength),
 		LatestCrosslinks: []*pbp2p.Crosslink{
 			{
-				ShardBlockRootHash32: []byte("A"),
+				CrosslinkDataRootHash32: []byte("A"),
 			},
 		},
 	}
@@ -163,7 +163,7 @@ func TestAttestationInfoAtSlot_OK(t *testing.T) {
 		JustifiedEpoch:           2 + params.BeaconConfig().GenesisEpoch,
 		JustifiedBlockRootHash32: justifiedBlockRoot[:],
 		LatestCrosslink: &pbp2p.Crosslink{
-			ShardBlockRootHash32: []byte("A"),
+			CrosslinkDataRootHash32: []byte("A"),
 		},
 	}
 
diff --git a/beacon-chain/sync/regular_sync_test.go b/beacon-chain/sync/regular_sync_test.go
index 1f1a5683dee..2b7139f32a8 100644
--- a/beacon-chain/sync/regular_sync_test.go
+++ b/beacon-chain/sync/regular_sync_test.go
@@ -179,7 +179,7 @@ func TestProcessBlock_OK(t *testing.T) {
 		Data: &pb.AttestationData{
 			Slot:                 0,
 			Shard:                0,
-			ShardBlockRootHash32: []byte{'A'},
+			CrosslinkDataRootHash32: []byte{'A'},
 		},
 	}
 
@@ -261,7 +261,7 @@ func TestProcessBlock_MultipleBlocks(t *testing.T) {
 		Block: data1,
 		Attestation: &pb.Attestation{
 			Data: &pb.AttestationData{
-				ShardBlockRootHash32: []byte{},
+				CrosslinkDataRootHash32: []byte{},
 				Slot:                 params.BeaconConfig().GenesisSlot,
 			},
 		},
@@ -286,7 +286,7 @@ func TestProcessBlock_MultipleBlocks(t *testing.T) {
 		Block: data2,
 		Attestation: &pb.Attestation{
 			Data: &pb.AttestationData{
-				ShardBlockRootHash32: []byte{},
+				CrosslinkDataRootHash32: []byte{},
 				Slot:                 0,
 			},
 		},
diff --git a/proto/beacon/p2p/v1/types.pb.go b/proto/beacon/p2p/v1/types.pb.go
index c4226552d93..2cee91696d7 100755
--- a/proto/beacon/p2p/v1/types.pb.go
+++ b/proto/beacon/p2p/v1/types.pb.go
@@ -44,7 +44,7 @@ func (x Validator_StatusFlags) String() string {
 	return proto.EnumName(Validator_StatusFlags_name, int32(x))
 }
 func (Validator_StatusFlags) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{6, 0}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{6, 0}
 }
 
 type BeaconState struct {
@@ -82,7 +82,7 @@ func (m *BeaconState) Reset()         { *m = BeaconState{} }
 func (m *BeaconState) String() string { return proto.CompactTextString(m) }
 func (*BeaconState) ProtoMessage()    {}
 func (*BeaconState) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{0}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{0}
 }
 func (m *BeaconState) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -299,7 +299,7 @@ func (m *Fork) Reset()         { *m = Fork{} }
 func (m *Fork) String() string { return proto.CompactTextString(m) }
 func (*Fork) ProtoMessage()    {}
 func (*Fork) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{1}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{1}
 }
 func (m *Fork) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -363,7 +363,7 @@ func (m *PendingAttestation) Reset()         { *m = PendingAttestation{} }
 func (m *PendingAttestation) String() string { return proto.CompactTextString(m) }
 func (*PendingAttestation) ProtoMessage()    {}
 func (*PendingAttestation) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{2}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{2}
 }
 func (m *PendingAttestation) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -434,7 +434,7 @@ func (m *Attestation) Reset()         { *m = Attestation{} }
 func (m *Attestation) String() string { return proto.CompactTextString(m) }
 func (*Attestation) ProtoMessage()    {}
 func (*Attestation) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{3}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{3}
 }
 func (m *Attestation) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -496,7 +496,7 @@ type AttestationData struct {
 	Shard                    uint64     `protobuf:"varint,2,opt,name=shard,proto3" json:"shard,omitempty"`
 	BeaconBlockRootHash32    []byte     `protobuf:"bytes,3,opt,name=beacon_block_root_hash32,json=beaconBlockRootHash32,proto3" json:"beacon_block_root_hash32,omitempty"`
 	EpochBoundaryRootHash32  []byte     `protobuf:"bytes,4,opt,name=epoch_boundary_root_hash32,json=epochBoundaryRootHash32,proto3" json:"epoch_boundary_root_hash32,omitempty"`
-	ShardBlockRootHash32     []byte     `protobuf:"bytes,5,opt,name=shard_block_root_hash32,json=shardBlockRootHash32,proto3" json:"shard_block_root_hash32,omitempty"`
+	CrosslinkDataRootHash32  []byte     `protobuf:"bytes,5,opt,name=crosslink_data_root_hash32,json=crosslinkDataRootHash32,proto3" json:"crosslink_data_root_hash32,omitempty"`
 	LatestCrosslink          *Crosslink `protobuf:"bytes,6,opt,name=latest_crosslink,json=latestCrosslink,proto3" json:"latest_crosslink,omitempty"`
 	JustifiedEpoch           uint64     `protobuf:"varint,7,opt,name=justified_epoch,json=justifiedEpoch,proto3" json:"justified_epoch,omitempty"`
 	JustifiedBlockRootHash32 []byte     `protobuf:"bytes,8,opt,name=justified_block_root_hash32,json=justifiedBlockRootHash32,proto3" json:"justified_block_root_hash32,omitempty"`
@@ -509,7 +509,7 @@ func (m *AttestationData) Reset()         { *m = AttestationData{} }
 func (m *AttestationData) String() string { return proto.CompactTextString(m) }
 func (*AttestationData) ProtoMessage()    {}
 func (*AttestationData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{4}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{4}
 }
 func (m *AttestationData) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -566,9 +566,9 @@ func (m *AttestationData) GetEpochBoundaryRootHash32() []byte {
 	return nil
 }
 
-func (m *AttestationData) GetShardBlockRootHash32() []byte {
+func (m *AttestationData) GetCrosslinkDataRootHash32() []byte {
 	if m != nil {
-		return m.ShardBlockRootHash32
+		return m.CrosslinkDataRootHash32
 	}
 	return nil
 }
@@ -606,7 +606,7 @@ func (m *AttestationDataAndCustodyBit) Reset()         { *m = AttestationDataAnd
 func (m *AttestationDataAndCustodyBit) String() string { return proto.CompactTextString(m) }
 func (*AttestationDataAndCustodyBit) ProtoMessage()    {}
 func (*AttestationDataAndCustodyBit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{5}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{5}
 }
 func (m *AttestationDataAndCustodyBit) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -666,7 +666,7 @@ func (m *Validator) Reset()         { *m = Validator{} }
 func (m *Validator) String() string { return proto.CompactTextString(m) }
 func (*Validator) ProtoMessage()    {}
 func (*Validator) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{6}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{6}
 }
 func (m *Validator) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -757,7 +757,7 @@ func (m *ShardReassignmentRecord) Reset()         { *m = ShardReassignmentRecord
 func (m *ShardReassignmentRecord) String() string { return proto.CompactTextString(m) }
 func (*ShardReassignmentRecord) ProtoMessage()    {}
 func (*ShardReassignmentRecord) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{7}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{7}
 }
 func (m *ShardReassignmentRecord) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -808,18 +808,18 @@ func (m *ShardReassignmentRecord) GetSlot() uint64 {
 }
 
 type Crosslink struct {
-	Epoch                uint64   `protobuf:"varint,1,opt,name=epoch,proto3" json:"epoch,omitempty"`
-	ShardBlockRootHash32 []byte   `protobuf:"bytes,2,opt,name=shard_block_root_hash32,json=shardBlockRootHash32,proto3" json:"shard_block_root_hash32,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	Epoch                   uint64   `protobuf:"varint,1,opt,name=epoch,proto3" json:"epoch,omitempty"`
+	CrosslinkDataRootHash32 []byte   `protobuf:"bytes,2,opt,name=crosslink_data_root_hash32,json=crosslinkDataRootHash32,proto3" json:"crosslink_data_root_hash32,omitempty"`
+	XXX_NoUnkeyedLiteral    struct{} `json:"-"`
+	XXX_unrecognized        []byte   `json:"-"`
+	XXX_sizecache           int32    `json:"-"`
 }
 
 func (m *Crosslink) Reset()         { *m = Crosslink{} }
 func (m *Crosslink) String() string { return proto.CompactTextString(m) }
 func (*Crosslink) ProtoMessage()    {}
 func (*Crosslink) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{8}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{8}
 }
 func (m *Crosslink) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -855,9 +855,9 @@ func (m *Crosslink) GetEpoch() uint64 {
 	return 0
 }
 
-func (m *Crosslink) GetShardBlockRootHash32() []byte {
+func (m *Crosslink) GetCrosslinkDataRootHash32() []byte {
 	if m != nil {
-		return m.ShardBlockRootHash32
+		return m.CrosslinkDataRootHash32
 	}
 	return nil
 }
@@ -879,7 +879,7 @@ func (m *BeaconBlock) Reset()         { *m = BeaconBlock{} }
 func (m *BeaconBlock) String() string { return proto.CompactTextString(m) }
 func (*BeaconBlock) ProtoMessage()    {}
 func (*BeaconBlock) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{9}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{9}
 }
 func (m *BeaconBlock) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -972,7 +972,7 @@ func (m *BeaconBlockBody) Reset()         { *m = BeaconBlockBody{} }
 func (m *BeaconBlockBody) String() string { return proto.CompactTextString(m) }
 func (*BeaconBlockBody) ProtoMessage()    {}
 func (*BeaconBlockBody) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{10}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{10}
 }
 func (m *BeaconBlockBody) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1049,7 +1049,7 @@ func (m *DepositInput) Reset()         { *m = DepositInput{} }
 func (m *DepositInput) String() string { return proto.CompactTextString(m) }
 func (*DepositInput) ProtoMessage()    {}
 func (*DepositInput) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{11}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{11}
 }
 func (m *DepositInput) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1112,7 +1112,7 @@ func (m *ProposalSignedData) Reset()         { *m = ProposalSignedData{} }
 func (m *ProposalSignedData) String() string { return proto.CompactTextString(m) }
 func (*ProposalSignedData) ProtoMessage()    {}
 func (*ProposalSignedData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{12}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{12}
 }
 func (m *ProposalSignedData) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1176,7 +1176,7 @@ func (m *SlashableAttestation) Reset()         { *m = SlashableAttestation{} }
 func (m *SlashableAttestation) String() string { return proto.CompactTextString(m) }
 func (*SlashableAttestation) ProtoMessage()    {}
 func (*SlashableAttestation) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{13}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{13}
 }
 func (m *SlashableAttestation) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1246,7 +1246,7 @@ func (m *DepositData) Reset()         { *m = DepositData{} }
 func (m *DepositData) String() string { return proto.CompactTextString(m) }
 func (*DepositData) ProtoMessage()    {}
 func (*DepositData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{14}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{14}
 }
 func (m *DepositData) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1311,7 +1311,7 @@ func (m *ProposerSlashing) Reset()         { *m = ProposerSlashing{} }
 func (m *ProposerSlashing) String() string { return proto.CompactTextString(m) }
 func (*ProposerSlashing) ProtoMessage()    {}
 func (*ProposerSlashing) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{15}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{15}
 }
 func (m *ProposerSlashing) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1387,7 +1387,7 @@ func (m *AttesterSlashing) Reset()         { *m = AttesterSlashing{} }
 func (m *AttesterSlashing) String() string { return proto.CompactTextString(m) }
 func (*AttesterSlashing) ProtoMessage()    {}
 func (*AttesterSlashing) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{16}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{16}
 }
 func (m *AttesterSlashing) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1443,7 +1443,7 @@ func (m *Deposit) Reset()         { *m = Deposit{} }
 func (m *Deposit) String() string { return proto.CompactTextString(m) }
 func (*Deposit) ProtoMessage()    {}
 func (*Deposit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{17}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{17}
 }
 func (m *Deposit) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1506,7 +1506,7 @@ func (m *VoluntaryExit) Reset()         { *m = VoluntaryExit{} }
 func (m *VoluntaryExit) String() string { return proto.CompactTextString(m) }
 func (*VoluntaryExit) ProtoMessage()    {}
 func (*VoluntaryExit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{18}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{18}
 }
 func (m *VoluntaryExit) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1568,7 +1568,7 @@ func (m *Eth1Data) Reset()         { *m = Eth1Data{} }
 func (m *Eth1Data) String() string { return proto.CompactTextString(m) }
 func (*Eth1Data) ProtoMessage()    {}
 func (*Eth1Data) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{19}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{19}
 }
 func (m *Eth1Data) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1623,7 +1623,7 @@ func (m *Eth1DataVote) Reset()         { *m = Eth1DataVote{} }
 func (m *Eth1DataVote) String() string { return proto.CompactTextString(m) }
 func (*Eth1DataVote) ProtoMessage()    {}
 func (*Eth1DataVote) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{20}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{20}
 }
 func (m *Eth1DataVote) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2148,11 +2148,11 @@ func (m *AttestationData) MarshalTo(dAtA []byte) (int, error) {
 		i = encodeVarintTypes(dAtA, i, uint64(len(m.EpochBoundaryRootHash32)))
 		i += copy(dAtA[i:], m.EpochBoundaryRootHash32)
 	}
-	if len(m.ShardBlockRootHash32) > 0 {
+	if len(m.CrosslinkDataRootHash32) > 0 {
 		dAtA[i] = 0x2a
 		i++
-		i = encodeVarintTypes(dAtA, i, uint64(len(m.ShardBlockRootHash32)))
-		i += copy(dAtA[i:], m.ShardBlockRootHash32)
+		i = encodeVarintTypes(dAtA, i, uint64(len(m.CrosslinkDataRootHash32)))
+		i += copy(dAtA[i:], m.CrosslinkDataRootHash32)
 	}
 	if m.LatestCrosslink != nil {
 		dAtA[i] = 0x32
@@ -2336,11 +2336,11 @@ func (m *Crosslink) MarshalTo(dAtA []byte) (int, error) {
 		i++
 		i = encodeVarintTypes(dAtA, i, uint64(m.Epoch))
 	}
-	if len(m.ShardBlockRootHash32) > 0 {
+	if len(m.CrosslinkDataRootHash32) > 0 {
 		dAtA[i] = 0x12
 		i++
-		i = encodeVarintTypes(dAtA, i, uint64(len(m.ShardBlockRootHash32)))
-		i += copy(dAtA[i:], m.ShardBlockRootHash32)
+		i = encodeVarintTypes(dAtA, i, uint64(len(m.CrosslinkDataRootHash32)))
+		i += copy(dAtA[i:], m.CrosslinkDataRootHash32)
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -3149,7 +3149,7 @@ func (m *AttestationData) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovTypes(uint64(l))
 	}
-	l = len(m.ShardBlockRootHash32)
+	l = len(m.CrosslinkDataRootHash32)
 	if l > 0 {
 		n += 1 + l + sovTypes(uint64(l))
 	}
@@ -3254,7 +3254,7 @@ func (m *Crosslink) Size() (n int) {
 	if m.Epoch != 0 {
 		n += 1 + sovTypes(uint64(m.Epoch))
 	}
-	l = len(m.ShardBlockRootHash32)
+	l = len(m.CrosslinkDataRootHash32)
 	if l > 0 {
 		n += 1 + l + sovTypes(uint64(l))
 	}
@@ -4949,7 +4949,7 @@ func (m *AttestationData) Unmarshal(dAtA []byte) error {
 			iNdEx = postIndex
 		case 5:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field ShardBlockRootHash32", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field CrosslinkDataRootHash32", wireType)
 			}
 			var byteLen int
 			for shift := uint(0); ; shift += 7 {
@@ -4973,9 +4973,9 @@ func (m *AttestationData) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.ShardBlockRootHash32 = append(m.ShardBlockRootHash32[:0], dAtA[iNdEx:postIndex]...)
-			if m.ShardBlockRootHash32 == nil {
-				m.ShardBlockRootHash32 = []byte{}
+			m.CrosslinkDataRootHash32 = append(m.CrosslinkDataRootHash32[:0], dAtA[iNdEx:postIndex]...)
+			if m.CrosslinkDataRootHash32 == nil {
+				m.CrosslinkDataRootHash32 = []byte{}
 			}
 			iNdEx = postIndex
 		case 6:
@@ -5553,7 +5553,7 @@ func (m *Crosslink) Unmarshal(dAtA []byte) error {
 			}
 		case 2:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field ShardBlockRootHash32", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field CrosslinkDataRootHash32", wireType)
 			}
 			var byteLen int
 			for shift := uint(0); ; shift += 7 {
@@ -5577,9 +5577,9 @@ func (m *Crosslink) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.ShardBlockRootHash32 = append(m.ShardBlockRootHash32[:0], dAtA[iNdEx:postIndex]...)
-			if m.ShardBlockRootHash32 == nil {
-				m.ShardBlockRootHash32 = []byte{}
+			m.CrosslinkDataRootHash32 = append(m.CrosslinkDataRootHash32[:0], dAtA[iNdEx:postIndex]...)
+			if m.CrosslinkDataRootHash32 == nil {
+				m.CrosslinkDataRootHash32 = []byte{}
 			}
 			iNdEx = postIndex
 		default:
@@ -7562,131 +7562,131 @@ var (
 )
 
 func init() {
-	proto.RegisterFile("proto/beacon/p2p/v1/types.proto", fileDescriptor_types_0317e0784c4aa0b4)
+	proto.RegisterFile("proto/beacon/p2p/v1/types.proto", fileDescriptor_types_8a9af0146f22ddb5)
 }
 
-var fileDescriptor_types_0317e0784c4aa0b4 = []byte{
+var fileDescriptor_types_8a9af0146f22ddb5 = []byte{
 	// 1938 bytes of a gzipped FileDescriptorProto
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+	0x80, 0xbd, 0xc5, 0xe6, 0x48, 0x1b, 0xf9, 0xab, 0x34, 0xf5, 0x75, 0xfc, 0x1f, 0x56, 0x69, 0x5a,
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+	0x0e, 0xba, 0x83, 0xe4, 0xe1, 0x6d, 0xc8, 0x77, 0xf7, 0xa6, 0x52, 0xb6, 0xa4, 0x2e, 0x7e, 0x74,
+	0xdf, 0x83, 0x0d, 0xcd, 0xe1, 0x11, 0x21, 0x3a, 0xac, 0x54, 0xa4, 0x56, 0x94, 0xe2, 0x24, 0x22,
+	0x44, 0x05, 0xd6, 0x2d, 0x88, 0x43, 0xdb, 0x49, 0x72, 0xb3, 0x6c, 0x97, 0xdc, 0x34, 0x71, 0x2c,
+	0x1f, 0xd6, 0x26, 0x2a, 0x6a, 0xce, 0xb4, 0x31, 0x67, 0xc6, 0x29, 0xcc, 0x9d, 0x71, 0x26, 0xfa,
+	0x6e, 0x71, 0xaa, 0xef, 0x5a, 0x5f, 0x86, 0x95, 0xe4, 0xc1, 0x5f, 0x87, 0xcd, 0x78, 0x73, 0xd9,
+	0x7a, 0xa6, 0xca, 0xf4, 0x86, 0x56, 0x65, 0xa6, 0x86, 0x5b, 0x50, 0x56, 0xd5, 0x6f, 0x62, 0x12,
+	0x29, 0x49, 0x99, 0x2e, 0x7a, 0x3e, 0x94, 0xb3, 0xff, 0x09, 0x4c, 0xce, 0x10, 0xc6, 0x4b, 0xcf,
+	0x10, 0x37, 0x00, 0xc6, 0x94, 0x13, 0xa7, 0x9b, 0xa9, 0x06, 0xab, 0x42, 0xf2, 0x50, 0x08, 0x5a,
+	0xe5, 0x5f, 0x3d, 0xbf, 0x69, 0xfc, 0xfa, 0xf9, 0x4d, 0xe3, 0x2f, 0xcf, 0x6f, 0x1a, 0x9d, 0x25,
+	0xf9, 0x4f, 0xf0, 0x1b, 0xff, 0x0d, 0x00, 0x00, 0xff, 0xff, 0x40, 0x0b, 0xb5, 0x02, 0x61, 0x16,
 	0x00, 0x00,
 }
diff --git a/proto/beacon/p2p/v1/types.proto b/proto/beacon/p2p/v1/types.proto
index 699d03270e0..d61bc6b545d 100644
--- a/proto/beacon/p2p/v1/types.proto
+++ b/proto/beacon/p2p/v1/types.proto
@@ -68,7 +68,7 @@ message AttestationData {
   uint64 shard = 2;
   bytes beacon_block_root_hash32 = 3;
   bytes epoch_boundary_root_hash32  = 4;
-  bytes shard_block_root_hash32 = 5;
+  bytes crosslink_data_root_hash32 = 5;
   Crosslink latest_crosslink = 6;
   uint64 justified_epoch = 7;
   bytes justified_block_root_hash32 = 8;
@@ -105,7 +105,7 @@ message ShardReassignmentRecord {
 
 message Crosslink {
   uint64 epoch = 1;
-  bytes shard_block_root_hash32 = 2;
+  bytes crosslink_data_root_hash32 = 2;
 }
 
 message BeaconBlock {
diff --git a/validator/client/validator_attest.go b/validator/client/validator_attest.go
index e5e262c7b7b..51f4e928b11 100644
--- a/validator/client/validator_attest.go
+++ b/validator/client/validator_attest.go
@@ -25,7 +25,7 @@ func (v *validator) AttestToBlockHead(ctx context.Context, slot uint64) {
 	// object based upon the state at the assigned slot.
 	attData := &pbp2p.AttestationData{
 		Slot:                 slot,
-		ShardBlockRootHash32: params.BeaconConfig().ZeroHash[:], // Stub for Phase 0.
+		CrosslinkDataRootHash32: params.BeaconConfig().ZeroHash[:], // Stub for Phase 0.
 	}
 	// We fetch the validator index as it is necessary to generate the aggregation
 	// bitfield of the attestation itself.
diff --git a/validator/client/validator_attest_test.go b/validator/client/validator_attest_test.go
index 9dd7ccd68ea..84c0384ff36 100644
--- a/validator/client/validator_attest_test.go
+++ b/validator/client/validator_attest_test.go
@@ -136,7 +136,7 @@ func TestAttestToBlockHead_AttestsCorrectly(t *testing.T) {
 		BeaconBlockRootHash32:    []byte("A"),
 		EpochBoundaryRootHash32:  []byte("B"),
 		JustifiedBlockRootHash32: []byte("C"),
-		LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
+		LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
 		JustifiedEpoch:           3,
 	}, nil)
 
@@ -161,8 +161,8 @@ func TestAttestToBlockHead_AttestsCorrectly(t *testing.T) {
 			BeaconBlockRootHash32:    []byte("A"),
 			EpochBoundaryRootHash32:  []byte("B"),
 			JustifiedBlockRootHash32: []byte("C"),
-			LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 			JustifiedEpoch:           3,
 		},
 		CustodyBitfield:     make([]byte, (len(committee)+7)/8),
@@ -204,7 +204,7 @@ func TestAttestToBlockHead_DoesNotAttestBeforeDelay(t *testing.T) {
 		BeaconBlockRootHash32:    []byte("A"),
 		EpochBoundaryRootHash32:  []byte("B"),
 		JustifiedBlockRootHash32: []byte("C"),
-		LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
+		LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
 		JustifiedEpoch:           3,
 	}, nil).Do(func(arg0, arg1 interface{}) {
 		wg.Done()
@@ -257,7 +257,7 @@ func TestAttestToBlockHead_DoesAttestAfterDelay(t *testing.T) {
 		BeaconBlockRootHash32:    []byte("A"),
 		EpochBoundaryRootHash32:  []byte("B"),
 		JustifiedBlockRootHash32: []byte("C"),
-		LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
+		LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
 		JustifiedEpoch:           3,
 	}, nil).Do(func(arg0, arg1 interface{}) {
 		wg.Done()

From a4ecc3179a6074008f27f42e7d22f9fb8aa43647 Mon Sep 17 00:00:00 2001
From: Terence Tsao <terence@prysmaticlabs.com>
Date: Wed, 27 Feb 2019 13:21:58 -0800
Subject: [PATCH 3/4] rename shard_block_root -> crosslink_data_root

---
 beacon-chain/core/blocks/block_operations.go  |   6 +-
 .../core/blocks/block_operations_test.go      |  18 +-
 beacon-chain/core/epoch/epoch_operations.go   |   2 +-
 .../core/epoch/epoch_operations_test.go       |  12 +-
 beacon-chain/core/epoch/epoch_processing.go   |   2 +-
 .../core/epoch/epoch_processing_test.go       |  10 +-
 beacon-chain/core/state/state.go              |   2 +-
 beacon-chain/core/state/transition_test.go    |  12 +-
 beacon-chain/core/validators/validator.go     |   4 +-
 .../core/validators/validator_test.go         |   4 +-
 beacon-chain/rpc/attester_server_test.go      |   6 +-
 beacon-chain/sync/regular_sync_test.go        |   6 +-
 proto/beacon/p2p/v1/types.pb.go               | 342 +++++++++---------
 proto/beacon/p2p/v1/types.proto               |   4 +-
 validator/client/validator_attest.go          |   2 +-
 validator/client/validator_attest_test.go     |  10 +-
 16 files changed, 221 insertions(+), 221 deletions(-)

diff --git a/beacon-chain/core/blocks/block_operations.go b/beacon-chain/core/blocks/block_operations.go
index 452ae8565dd..f48202e6c29 100644
--- a/beacon-chain/core/blocks/block_operations.go
+++ b/beacon-chain/core/blocks/block_operations.go
@@ -485,7 +485,7 @@ func verifyAttestation(beaconState *pb.BeaconState, att *pb.Attestation, verifyS
 	// 	equals state.latest_crosslinks[attestation.data.shard]
 	shard := att.Data.Shard
 	crosslink := &pb.Crosslink{
-		ShardBlockRootHash32: att.Data.ShardBlockRootHash32,
+		CrosslinkDataRootHash32: att.Data.CrosslinkDataRootHash32,
 		Epoch:                helpers.SlotToEpoch(att.Data.Slot),
 	}
 	crosslinkFromAttestation := att.Data.LatestCrosslink
@@ -499,11 +499,11 @@ func verifyAttestation(beaconState *pb.BeaconState, att *pb.Attestation, verifyS
 	}
 
 	// Verify attestation.shard_block_root == ZERO_HASH [TO BE REMOVED IN PHASE 1].
-	if !bytes.Equal(att.Data.ShardBlockRootHash32, params.BeaconConfig().ZeroHash[:]) {
+	if !bytes.Equal(att.Data.CrosslinkDataRootHash32, params.BeaconConfig().ZeroHash[:]) {
 		return fmt.Errorf(
 			"expected attestation.ShardBlockRoot == %#x, received %#x instead",
 			params.BeaconConfig().ZeroHash[:],
-			att.Data.ShardBlockRootHash32,
+			att.Data.CrosslinkDataRootHash32,
 		)
 	}
 	if verifySignatures {
diff --git a/beacon-chain/core/blocks/block_operations_test.go b/beacon-chain/core/blocks/block_operations_test.go
index 866ac30e14f..7262649cc98 100644
--- a/beacon-chain/core/blocks/block_operations_test.go
+++ b/beacon-chain/core/blocks/block_operations_test.go
@@ -907,7 +907,7 @@ func TestProcessBlockAttestations_CrosslinkRootFailure(t *testing.T) {
 	// the attestation should be invalid.
 	stateLatestCrosslinks := []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	state := &pb.BeaconState{
@@ -922,8 +922,8 @@ func TestProcessBlockAttestations_CrosslinkRootFailure(t *testing.T) {
 				Shard:                    0,
 				Slot:                     params.BeaconConfig().GenesisSlot + 20,
 				JustifiedBlockRootHash32: blockRoots[0],
-				LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{2}},
-				ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+				LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{2}},
+				CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 				JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			},
 		},
@@ -953,7 +953,7 @@ func TestProcessBlockAttestations_ShardBlockRootEqualZeroHashFailure(t *testing.
 	}
 	stateLatestCrosslinks := []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	state := &pb.BeaconState{
@@ -968,8 +968,8 @@ func TestProcessBlockAttestations_ShardBlockRootEqualZeroHashFailure(t *testing.
 				Shard:                    0,
 				Slot:                     params.BeaconConfig().GenesisSlot + 20,
 				JustifiedBlockRootHash32: blockRoots[0],
-				LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-				ShardBlockRootHash32:     []byte{1},
+				LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+				CrosslinkDataRootHash32:     []byte{1},
 				JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			},
 		},
@@ -1000,7 +1000,7 @@ func TestProcessBlockAttestations_CreatePendingAttestations(t *testing.T) {
 	}
 	stateLatestCrosslinks := []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	state := &pb.BeaconState{
@@ -1014,8 +1014,8 @@ func TestProcessBlockAttestations_CreatePendingAttestations(t *testing.T) {
 			Shard:                    0,
 			Slot:                     params.BeaconConfig().GenesisSlot + 20,
 			JustifiedBlockRootHash32: blockRoots[0],
-			LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 		},
 		AggregationBitfield: []byte{1},
diff --git a/beacon-chain/core/epoch/epoch_operations.go b/beacon-chain/core/epoch/epoch_operations.go
index 680f67f4d22..6f3f01ade28 100644
--- a/beacon-chain/core/epoch/epoch_operations.go
+++ b/beacon-chain/core/epoch/epoch_operations.go
@@ -319,7 +319,7 @@ func winningRoot(
 
 	for _, attestation := range attestations {
 		if attestation.Data.Shard == shard {
-			candidateRoots = append(candidateRoots, attestation.Data.ShardBlockRootHash32)
+			candidateRoots = append(candidateRoots, attestation.Data.CrosslinkDataRootHash32)
 		}
 	}
 
diff --git a/beacon-chain/core/epoch/epoch_operations_test.go b/beacon-chain/core/epoch/epoch_operations_test.go
index 001f06f6263..454d34c0a3c 100644
--- a/beacon-chain/core/epoch/epoch_operations_test.go
+++ b/beacon-chain/core/epoch/epoch_operations_test.go
@@ -352,7 +352,7 @@ func TestWinningRoot_AccurateRoot(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 params.BeaconConfig().GenesisSlot,
-				ShardBlockRootHash32: []byte{byte(i + 100)},
+				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			AggregationBitfield: participationBitfield,
 		}
@@ -380,7 +380,7 @@ func TestWinningRoot_EmptyParticipantBitfield(t *testing.T) {
 	attestations := []*pb.PendingAttestation{
 		{Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot,
-			ShardBlockRootHash32: []byte{},
+			CrosslinkDataRootHash32: []byte{},
 		},
 			AggregationBitfield: []byte{},
 		},
@@ -400,7 +400,7 @@ func TestAttestingValidators_MatchActive(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 params.BeaconConfig().GenesisSlot,
-				ShardBlockRootHash32: []byte{byte(i + 100)},
+				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			AggregationBitfield: []byte{0x03},
 		}
@@ -428,7 +428,7 @@ func TestAttestingValidators_EmptyWinningRoot(t *testing.T) {
 	attestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot,
-			ShardBlockRootHash32: []byte{},
+			CrosslinkDataRootHash32: []byte{},
 		},
 		AggregationBitfield: []byte{},
 	}
@@ -449,7 +449,7 @@ func TestTotalAttestingBalance_CorrectBalance(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 params.BeaconConfig().GenesisSlot,
-				ShardBlockRootHash32: []byte{byte(i + 100)},
+				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			// All validators attested to the above roots.
 			AggregationBitfield: []byte{0x03},
@@ -477,7 +477,7 @@ func TestTotalAttestingBalance_EmptyWinningRoot(t *testing.T) {
 	attestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot,
-			ShardBlockRootHash32: []byte{},
+			CrosslinkDataRootHash32: []byte{},
 		},
 		AggregationBitfield: []byte{},
 	}
diff --git a/beacon-chain/core/epoch/epoch_processing.go b/beacon-chain/core/epoch/epoch_processing.go
index d7a95f3b708..05c5938b53b 100644
--- a/beacon-chain/core/epoch/epoch_processing.go
+++ b/beacon-chain/core/epoch/epoch_processing.go
@@ -214,7 +214,7 @@ func ProcessCrosslinks(
 				}
 				state.LatestCrosslinks[shard] = &pb.Crosslink{
 					Epoch:                currentEpoch,
-					ShardBlockRootHash32: winningRoot,
+					CrosslinkDataRootHash32: winningRoot,
 				}
 			}
 		}
diff --git a/beacon-chain/core/epoch/epoch_processing_test.go b/beacon-chain/core/epoch/epoch_processing_test.go
index 062eb557f08..9710474f0ed 100644
--- a/beacon-chain/core/epoch/epoch_processing_test.go
+++ b/beacon-chain/core/epoch/epoch_processing_test.go
@@ -257,7 +257,7 @@ func TestProcessCrosslinks_CrosslinksCorrectEpoch(t *testing.T) {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
 				Slot:                 state.Slot,
-				ShardBlockRootHash32: []byte{'A'},
+				CrosslinkDataRootHash32: []byte{'A'},
 			},
 			// All validators attested to the above roots.
 			AggregationBitfield: participationBitfield,
@@ -279,11 +279,11 @@ func TestProcessCrosslinks_CrosslinksCorrectEpoch(t *testing.T) {
 			newState.LatestCrosslinks[0].Epoch, +params.BeaconConfig().GenesisSlot)
 	}
 	// Verify crosslink for shard 0 was root hashed for []byte{'A'}.
-	if !bytes.Equal(newState.LatestCrosslinks[0].ShardBlockRootHash32,
-		attestations[0].Data.ShardBlockRootHash32) {
+	if !bytes.Equal(newState.LatestCrosslinks[0].CrosslinkDataRootHash32,
+		attestations[0].Data.CrosslinkDataRootHash32) {
 		t.Errorf("Shard 0's root hash is %#x, wanted: %#x",
-			newState.LatestCrosslinks[0].ShardBlockRootHash32,
-			attestations[0].Data.ShardBlockRootHash32)
+			newState.LatestCrosslinks[0].CrosslinkDataRootHash32,
+			attestations[0].Data.CrosslinkDataRootHash32)
 	}
 }
 
diff --git a/beacon-chain/core/state/state.go b/beacon-chain/core/state/state.go
index dfff613fdd7..6b2084f204c 100644
--- a/beacon-chain/core/state/state.go
+++ b/beacon-chain/core/state/state.go
@@ -52,7 +52,7 @@ func GenesisBeaconState(
 	for i := 0; i < len(latestCrosslinks); i++ {
 		latestCrosslinks[i] = &pb.Crosslink{
 			Epoch:                params.BeaconConfig().GenesisEpoch,
-			ShardBlockRootHash32: zeroHash,
+			CrosslinkDataRootHash32: zeroHash,
 		}
 	}
 
diff --git a/beacon-chain/core/state/transition_test.go b/beacon-chain/core/state/transition_test.go
index 8193767b136..de8a5faeee9 100644
--- a/beacon-chain/core/state/transition_test.go
+++ b/beacon-chain/core/state/transition_test.go
@@ -261,7 +261,7 @@ func TestProcessBlock_IncorrectProcessExits(t *testing.T) {
 	beaconState.LatestBlockRootHash32S = blockRoots
 	beaconState.LatestCrosslinks = []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	beaconState.Slot = params.BeaconConfig().GenesisSlot + 10
@@ -271,8 +271,8 @@ func TestProcessBlock_IncorrectProcessExits(t *testing.T) {
 			Slot:                     params.BeaconConfig().GenesisSlot,
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			JustifiedBlockRootHash32: blockRoots[0],
-			LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 		},
 		AggregationBitfield: []byte{1},
 		CustodyBitfield:     []byte{1},
@@ -353,7 +353,7 @@ func TestProcessBlock_PassesProcessingConditions(t *testing.T) {
 	beaconState.LatestBlockRootHash32S = blockRoots
 	beaconState.LatestCrosslinks = []*pb.Crosslink{
 		{
-			ShardBlockRootHash32: []byte{1},
+			CrosslinkDataRootHash32: []byte{1},
 		},
 	}
 	beaconState.Slot = params.BeaconConfig().GenesisSlot + 10
@@ -363,8 +363,8 @@ func TestProcessBlock_PassesProcessingConditions(t *testing.T) {
 			Slot:                     params.BeaconConfig().GenesisSlot,
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			JustifiedBlockRootHash32: blockRoots[0],
-			LatestCrosslink:          &pb.Crosslink{ShardBlockRootHash32: []byte{1}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 		},
 		AggregationBitfield: []byte{1},
 		CustodyBitfield:     []byte{1},
diff --git a/beacon-chain/core/validators/validator.go b/beacon-chain/core/validators/validator.go
index 16876119eb5..26dcd746c68 100644
--- a/beacon-chain/core/validators/validator.go
+++ b/beacon-chain/core/validators/validator.go
@@ -55,7 +55,7 @@ func ValidatorIndices(
 func AttestingValidatorIndices(
 	state *pb.BeaconState,
 	shard uint64,
-	shardBlockRoot []byte,
+	crosslinkDataRoot []byte,
 	thisEpochAttestations []*pb.PendingAttestation,
 	prevEpochAttestations []*pb.PendingAttestation) ([]uint64, error) {
 
@@ -64,7 +64,7 @@ func AttestingValidatorIndices(
 
 	for _, attestation := range attestations {
 		if attestation.Data.Shard == shard &&
-			bytes.Equal(attestation.Data.ShardBlockRootHash32, shardBlockRoot) {
+			bytes.Equal(attestation.Data.CrosslinkDataRootHash32, crosslinkDataRoot) {
 
 			validatorIndicesCommittee, err := helpers.AttestationParticipants(state, attestation.Data, attestation.AggregationBitfield)
 			if err != nil {
diff --git a/beacon-chain/core/validators/validator_test.go b/beacon-chain/core/validators/validator_test.go
index 2482de70822..adfeb607b6b 100644
--- a/beacon-chain/core/validators/validator_test.go
+++ b/beacon-chain/core/validators/validator_test.go
@@ -103,7 +103,7 @@ func TestAttestingValidatorIndices_OK(t *testing.T) {
 		Data: &pb.AttestationData{
 			Slot:                 params.BeaconConfig().GenesisSlot + 3,
 			Shard:                6,
-			ShardBlockRootHash32: []byte{'B'},
+			CrosslinkDataRootHash32: []byte{'B'},
 		},
 		AggregationBitfield: []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1},
 	}
@@ -141,7 +141,7 @@ func TestAttestingValidatorIndices_OutOfBound(t *testing.T) {
 		Data: &pb.AttestationData{
 			Slot:                 0,
 			Shard:                1,
-			ShardBlockRootHash32: []byte{'B'},
+			CrosslinkDataRootHash32: []byte{'B'},
 		},
 		AggregationBitfield: []byte{'A'}, // 01000001 = 1,7
 	}
diff --git a/beacon-chain/rpc/attester_server_test.go b/beacon-chain/rpc/attester_server_test.go
index ff2a20c5161..0a4fa9a2992 100644
--- a/beacon-chain/rpc/attester_server_test.go
+++ b/beacon-chain/rpc/attester_server_test.go
@@ -24,7 +24,7 @@ func TestAttestHead_OK(t *testing.T) {
 		Data: &pbp2p.AttestationData{
 			Slot:                 999,
 			Shard:                1,
-			ShardBlockRootHash32: []byte{'a'},
+			CrosslinkDataRootHash32: []byte{'a'},
 		},
 	}
 	if _, err := attesterServer.AttestHead(context.Background(), req); err != nil {
@@ -123,7 +123,7 @@ func TestAttestationDataAtSlot_OK(t *testing.T) {
 		LatestBlockRootHash32S: make([][]byte, params.BeaconConfig().LatestBlockRootsLength),
 		LatestCrosslinks: []*pbp2p.Crosslink{
 			{
-				ShardBlockRootHash32: []byte("A"),
+				CrosslinkDataRootHash32: []byte("A"),
 			},
 		},
 	}
@@ -163,7 +163,7 @@ func TestAttestationDataAtSlot_OK(t *testing.T) {
 		JustifiedEpoch:           2 + params.BeaconConfig().GenesisEpoch,
 		JustifiedBlockRootHash32: justifiedBlockRoot[:],
 		LatestCrosslink: &pbp2p.Crosslink{
-			ShardBlockRootHash32: []byte("A"),
+			CrosslinkDataRootHash32: []byte("A"),
 		},
 	}
 
diff --git a/beacon-chain/sync/regular_sync_test.go b/beacon-chain/sync/regular_sync_test.go
index 1f1a5683dee..2b7139f32a8 100644
--- a/beacon-chain/sync/regular_sync_test.go
+++ b/beacon-chain/sync/regular_sync_test.go
@@ -179,7 +179,7 @@ func TestProcessBlock_OK(t *testing.T) {
 		Data: &pb.AttestationData{
 			Slot:                 0,
 			Shard:                0,
-			ShardBlockRootHash32: []byte{'A'},
+			CrosslinkDataRootHash32: []byte{'A'},
 		},
 	}
 
@@ -261,7 +261,7 @@ func TestProcessBlock_MultipleBlocks(t *testing.T) {
 		Block: data1,
 		Attestation: &pb.Attestation{
 			Data: &pb.AttestationData{
-				ShardBlockRootHash32: []byte{},
+				CrosslinkDataRootHash32: []byte{},
 				Slot:                 params.BeaconConfig().GenesisSlot,
 			},
 		},
@@ -286,7 +286,7 @@ func TestProcessBlock_MultipleBlocks(t *testing.T) {
 		Block: data2,
 		Attestation: &pb.Attestation{
 			Data: &pb.AttestationData{
-				ShardBlockRootHash32: []byte{},
+				CrosslinkDataRootHash32: []byte{},
 				Slot:                 0,
 			},
 		},
diff --git a/proto/beacon/p2p/v1/types.pb.go b/proto/beacon/p2p/v1/types.pb.go
index c4226552d93..2cee91696d7 100755
--- a/proto/beacon/p2p/v1/types.pb.go
+++ b/proto/beacon/p2p/v1/types.pb.go
@@ -44,7 +44,7 @@ func (x Validator_StatusFlags) String() string {
 	return proto.EnumName(Validator_StatusFlags_name, int32(x))
 }
 func (Validator_StatusFlags) EnumDescriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{6, 0}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{6, 0}
 }
 
 type BeaconState struct {
@@ -82,7 +82,7 @@ func (m *BeaconState) Reset()         { *m = BeaconState{} }
 func (m *BeaconState) String() string { return proto.CompactTextString(m) }
 func (*BeaconState) ProtoMessage()    {}
 func (*BeaconState) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{0}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{0}
 }
 func (m *BeaconState) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -299,7 +299,7 @@ func (m *Fork) Reset()         { *m = Fork{} }
 func (m *Fork) String() string { return proto.CompactTextString(m) }
 func (*Fork) ProtoMessage()    {}
 func (*Fork) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{1}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{1}
 }
 func (m *Fork) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -363,7 +363,7 @@ func (m *PendingAttestation) Reset()         { *m = PendingAttestation{} }
 func (m *PendingAttestation) String() string { return proto.CompactTextString(m) }
 func (*PendingAttestation) ProtoMessage()    {}
 func (*PendingAttestation) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{2}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{2}
 }
 func (m *PendingAttestation) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -434,7 +434,7 @@ func (m *Attestation) Reset()         { *m = Attestation{} }
 func (m *Attestation) String() string { return proto.CompactTextString(m) }
 func (*Attestation) ProtoMessage()    {}
 func (*Attestation) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{3}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{3}
 }
 func (m *Attestation) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -496,7 +496,7 @@ type AttestationData struct {
 	Shard                    uint64     `protobuf:"varint,2,opt,name=shard,proto3" json:"shard,omitempty"`
 	BeaconBlockRootHash32    []byte     `protobuf:"bytes,3,opt,name=beacon_block_root_hash32,json=beaconBlockRootHash32,proto3" json:"beacon_block_root_hash32,omitempty"`
 	EpochBoundaryRootHash32  []byte     `protobuf:"bytes,4,opt,name=epoch_boundary_root_hash32,json=epochBoundaryRootHash32,proto3" json:"epoch_boundary_root_hash32,omitempty"`
-	ShardBlockRootHash32     []byte     `protobuf:"bytes,5,opt,name=shard_block_root_hash32,json=shardBlockRootHash32,proto3" json:"shard_block_root_hash32,omitempty"`
+	CrosslinkDataRootHash32  []byte     `protobuf:"bytes,5,opt,name=crosslink_data_root_hash32,json=crosslinkDataRootHash32,proto3" json:"crosslink_data_root_hash32,omitempty"`
 	LatestCrosslink          *Crosslink `protobuf:"bytes,6,opt,name=latest_crosslink,json=latestCrosslink,proto3" json:"latest_crosslink,omitempty"`
 	JustifiedEpoch           uint64     `protobuf:"varint,7,opt,name=justified_epoch,json=justifiedEpoch,proto3" json:"justified_epoch,omitempty"`
 	JustifiedBlockRootHash32 []byte     `protobuf:"bytes,8,opt,name=justified_block_root_hash32,json=justifiedBlockRootHash32,proto3" json:"justified_block_root_hash32,omitempty"`
@@ -509,7 +509,7 @@ func (m *AttestationData) Reset()         { *m = AttestationData{} }
 func (m *AttestationData) String() string { return proto.CompactTextString(m) }
 func (*AttestationData) ProtoMessage()    {}
 func (*AttestationData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{4}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{4}
 }
 func (m *AttestationData) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -566,9 +566,9 @@ func (m *AttestationData) GetEpochBoundaryRootHash32() []byte {
 	return nil
 }
 
-func (m *AttestationData) GetShardBlockRootHash32() []byte {
+func (m *AttestationData) GetCrosslinkDataRootHash32() []byte {
 	if m != nil {
-		return m.ShardBlockRootHash32
+		return m.CrosslinkDataRootHash32
 	}
 	return nil
 }
@@ -606,7 +606,7 @@ func (m *AttestationDataAndCustodyBit) Reset()         { *m = AttestationDataAnd
 func (m *AttestationDataAndCustodyBit) String() string { return proto.CompactTextString(m) }
 func (*AttestationDataAndCustodyBit) ProtoMessage()    {}
 func (*AttestationDataAndCustodyBit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{5}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{5}
 }
 func (m *AttestationDataAndCustodyBit) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -666,7 +666,7 @@ func (m *Validator) Reset()         { *m = Validator{} }
 func (m *Validator) String() string { return proto.CompactTextString(m) }
 func (*Validator) ProtoMessage()    {}
 func (*Validator) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{6}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{6}
 }
 func (m *Validator) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -757,7 +757,7 @@ func (m *ShardReassignmentRecord) Reset()         { *m = ShardReassignmentRecord
 func (m *ShardReassignmentRecord) String() string { return proto.CompactTextString(m) }
 func (*ShardReassignmentRecord) ProtoMessage()    {}
 func (*ShardReassignmentRecord) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{7}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{7}
 }
 func (m *ShardReassignmentRecord) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -808,18 +808,18 @@ func (m *ShardReassignmentRecord) GetSlot() uint64 {
 }
 
 type Crosslink struct {
-	Epoch                uint64   `protobuf:"varint,1,opt,name=epoch,proto3" json:"epoch,omitempty"`
-	ShardBlockRootHash32 []byte   `protobuf:"bytes,2,opt,name=shard_block_root_hash32,json=shardBlockRootHash32,proto3" json:"shard_block_root_hash32,omitempty"`
-	XXX_NoUnkeyedLiteral struct{} `json:"-"`
-	XXX_unrecognized     []byte   `json:"-"`
-	XXX_sizecache        int32    `json:"-"`
+	Epoch                   uint64   `protobuf:"varint,1,opt,name=epoch,proto3" json:"epoch,omitempty"`
+	CrosslinkDataRootHash32 []byte   `protobuf:"bytes,2,opt,name=crosslink_data_root_hash32,json=crosslinkDataRootHash32,proto3" json:"crosslink_data_root_hash32,omitempty"`
+	XXX_NoUnkeyedLiteral    struct{} `json:"-"`
+	XXX_unrecognized        []byte   `json:"-"`
+	XXX_sizecache           int32    `json:"-"`
 }
 
 func (m *Crosslink) Reset()         { *m = Crosslink{} }
 func (m *Crosslink) String() string { return proto.CompactTextString(m) }
 func (*Crosslink) ProtoMessage()    {}
 func (*Crosslink) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{8}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{8}
 }
 func (m *Crosslink) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -855,9 +855,9 @@ func (m *Crosslink) GetEpoch() uint64 {
 	return 0
 }
 
-func (m *Crosslink) GetShardBlockRootHash32() []byte {
+func (m *Crosslink) GetCrosslinkDataRootHash32() []byte {
 	if m != nil {
-		return m.ShardBlockRootHash32
+		return m.CrosslinkDataRootHash32
 	}
 	return nil
 }
@@ -879,7 +879,7 @@ func (m *BeaconBlock) Reset()         { *m = BeaconBlock{} }
 func (m *BeaconBlock) String() string { return proto.CompactTextString(m) }
 func (*BeaconBlock) ProtoMessage()    {}
 func (*BeaconBlock) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{9}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{9}
 }
 func (m *BeaconBlock) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -972,7 +972,7 @@ func (m *BeaconBlockBody) Reset()         { *m = BeaconBlockBody{} }
 func (m *BeaconBlockBody) String() string { return proto.CompactTextString(m) }
 func (*BeaconBlockBody) ProtoMessage()    {}
 func (*BeaconBlockBody) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{10}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{10}
 }
 func (m *BeaconBlockBody) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1049,7 +1049,7 @@ func (m *DepositInput) Reset()         { *m = DepositInput{} }
 func (m *DepositInput) String() string { return proto.CompactTextString(m) }
 func (*DepositInput) ProtoMessage()    {}
 func (*DepositInput) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{11}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{11}
 }
 func (m *DepositInput) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1112,7 +1112,7 @@ func (m *ProposalSignedData) Reset()         { *m = ProposalSignedData{} }
 func (m *ProposalSignedData) String() string { return proto.CompactTextString(m) }
 func (*ProposalSignedData) ProtoMessage()    {}
 func (*ProposalSignedData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{12}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{12}
 }
 func (m *ProposalSignedData) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1176,7 +1176,7 @@ func (m *SlashableAttestation) Reset()         { *m = SlashableAttestation{} }
 func (m *SlashableAttestation) String() string { return proto.CompactTextString(m) }
 func (*SlashableAttestation) ProtoMessage()    {}
 func (*SlashableAttestation) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{13}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{13}
 }
 func (m *SlashableAttestation) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1246,7 +1246,7 @@ func (m *DepositData) Reset()         { *m = DepositData{} }
 func (m *DepositData) String() string { return proto.CompactTextString(m) }
 func (*DepositData) ProtoMessage()    {}
 func (*DepositData) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{14}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{14}
 }
 func (m *DepositData) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1311,7 +1311,7 @@ func (m *ProposerSlashing) Reset()         { *m = ProposerSlashing{} }
 func (m *ProposerSlashing) String() string { return proto.CompactTextString(m) }
 func (*ProposerSlashing) ProtoMessage()    {}
 func (*ProposerSlashing) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{15}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{15}
 }
 func (m *ProposerSlashing) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1387,7 +1387,7 @@ func (m *AttesterSlashing) Reset()         { *m = AttesterSlashing{} }
 func (m *AttesterSlashing) String() string { return proto.CompactTextString(m) }
 func (*AttesterSlashing) ProtoMessage()    {}
 func (*AttesterSlashing) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{16}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{16}
 }
 func (m *AttesterSlashing) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1443,7 +1443,7 @@ func (m *Deposit) Reset()         { *m = Deposit{} }
 func (m *Deposit) String() string { return proto.CompactTextString(m) }
 func (*Deposit) ProtoMessage()    {}
 func (*Deposit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{17}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{17}
 }
 func (m *Deposit) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1506,7 +1506,7 @@ func (m *VoluntaryExit) Reset()         { *m = VoluntaryExit{} }
 func (m *VoluntaryExit) String() string { return proto.CompactTextString(m) }
 func (*VoluntaryExit) ProtoMessage()    {}
 func (*VoluntaryExit) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{18}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{18}
 }
 func (m *VoluntaryExit) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1568,7 +1568,7 @@ func (m *Eth1Data) Reset()         { *m = Eth1Data{} }
 func (m *Eth1Data) String() string { return proto.CompactTextString(m) }
 func (*Eth1Data) ProtoMessage()    {}
 func (*Eth1Data) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{19}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{19}
 }
 func (m *Eth1Data) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -1623,7 +1623,7 @@ func (m *Eth1DataVote) Reset()         { *m = Eth1DataVote{} }
 func (m *Eth1DataVote) String() string { return proto.CompactTextString(m) }
 func (*Eth1DataVote) ProtoMessage()    {}
 func (*Eth1DataVote) Descriptor() ([]byte, []int) {
-	return fileDescriptor_types_0317e0784c4aa0b4, []int{20}
+	return fileDescriptor_types_8a9af0146f22ddb5, []int{20}
 }
 func (m *Eth1DataVote) XXX_Unmarshal(b []byte) error {
 	return m.Unmarshal(b)
@@ -2148,11 +2148,11 @@ func (m *AttestationData) MarshalTo(dAtA []byte) (int, error) {
 		i = encodeVarintTypes(dAtA, i, uint64(len(m.EpochBoundaryRootHash32)))
 		i += copy(dAtA[i:], m.EpochBoundaryRootHash32)
 	}
-	if len(m.ShardBlockRootHash32) > 0 {
+	if len(m.CrosslinkDataRootHash32) > 0 {
 		dAtA[i] = 0x2a
 		i++
-		i = encodeVarintTypes(dAtA, i, uint64(len(m.ShardBlockRootHash32)))
-		i += copy(dAtA[i:], m.ShardBlockRootHash32)
+		i = encodeVarintTypes(dAtA, i, uint64(len(m.CrosslinkDataRootHash32)))
+		i += copy(dAtA[i:], m.CrosslinkDataRootHash32)
 	}
 	if m.LatestCrosslink != nil {
 		dAtA[i] = 0x32
@@ -2336,11 +2336,11 @@ func (m *Crosslink) MarshalTo(dAtA []byte) (int, error) {
 		i++
 		i = encodeVarintTypes(dAtA, i, uint64(m.Epoch))
 	}
-	if len(m.ShardBlockRootHash32) > 0 {
+	if len(m.CrosslinkDataRootHash32) > 0 {
 		dAtA[i] = 0x12
 		i++
-		i = encodeVarintTypes(dAtA, i, uint64(len(m.ShardBlockRootHash32)))
-		i += copy(dAtA[i:], m.ShardBlockRootHash32)
+		i = encodeVarintTypes(dAtA, i, uint64(len(m.CrosslinkDataRootHash32)))
+		i += copy(dAtA[i:], m.CrosslinkDataRootHash32)
 	}
 	if m.XXX_unrecognized != nil {
 		i += copy(dAtA[i:], m.XXX_unrecognized)
@@ -3149,7 +3149,7 @@ func (m *AttestationData) Size() (n int) {
 	if l > 0 {
 		n += 1 + l + sovTypes(uint64(l))
 	}
-	l = len(m.ShardBlockRootHash32)
+	l = len(m.CrosslinkDataRootHash32)
 	if l > 0 {
 		n += 1 + l + sovTypes(uint64(l))
 	}
@@ -3254,7 +3254,7 @@ func (m *Crosslink) Size() (n int) {
 	if m.Epoch != 0 {
 		n += 1 + sovTypes(uint64(m.Epoch))
 	}
-	l = len(m.ShardBlockRootHash32)
+	l = len(m.CrosslinkDataRootHash32)
 	if l > 0 {
 		n += 1 + l + sovTypes(uint64(l))
 	}
@@ -4949,7 +4949,7 @@ func (m *AttestationData) Unmarshal(dAtA []byte) error {
 			iNdEx = postIndex
 		case 5:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field ShardBlockRootHash32", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field CrosslinkDataRootHash32", wireType)
 			}
 			var byteLen int
 			for shift := uint(0); ; shift += 7 {
@@ -4973,9 +4973,9 @@ func (m *AttestationData) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.ShardBlockRootHash32 = append(m.ShardBlockRootHash32[:0], dAtA[iNdEx:postIndex]...)
-			if m.ShardBlockRootHash32 == nil {
-				m.ShardBlockRootHash32 = []byte{}
+			m.CrosslinkDataRootHash32 = append(m.CrosslinkDataRootHash32[:0], dAtA[iNdEx:postIndex]...)
+			if m.CrosslinkDataRootHash32 == nil {
+				m.CrosslinkDataRootHash32 = []byte{}
 			}
 			iNdEx = postIndex
 		case 6:
@@ -5553,7 +5553,7 @@ func (m *Crosslink) Unmarshal(dAtA []byte) error {
 			}
 		case 2:
 			if wireType != 2 {
-				return fmt.Errorf("proto: wrong wireType = %d for field ShardBlockRootHash32", wireType)
+				return fmt.Errorf("proto: wrong wireType = %d for field CrosslinkDataRootHash32", wireType)
 			}
 			var byteLen int
 			for shift := uint(0); ; shift += 7 {
@@ -5577,9 +5577,9 @@ func (m *Crosslink) Unmarshal(dAtA []byte) error {
 			if postIndex > l {
 				return io.ErrUnexpectedEOF
 			}
-			m.ShardBlockRootHash32 = append(m.ShardBlockRootHash32[:0], dAtA[iNdEx:postIndex]...)
-			if m.ShardBlockRootHash32 == nil {
-				m.ShardBlockRootHash32 = []byte{}
+			m.CrosslinkDataRootHash32 = append(m.CrosslinkDataRootHash32[:0], dAtA[iNdEx:postIndex]...)
+			if m.CrosslinkDataRootHash32 == nil {
+				m.CrosslinkDataRootHash32 = []byte{}
 			}
 			iNdEx = postIndex
 		default:
@@ -7562,131 +7562,131 @@ var (
 )
 
 func init() {
-	proto.RegisterFile("proto/beacon/p2p/v1/types.proto", fileDescriptor_types_0317e0784c4aa0b4)
+	proto.RegisterFile("proto/beacon/p2p/v1/types.proto", fileDescriptor_types_8a9af0146f22ddb5)
 }
 
-var fileDescriptor_types_0317e0784c4aa0b4 = []byte{
+var fileDescriptor_types_8a9af0146f22ddb5 = []byte{
 	// 1938 bytes of a gzipped FileDescriptorProto
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 	0x00, 0x00,
 }
diff --git a/proto/beacon/p2p/v1/types.proto b/proto/beacon/p2p/v1/types.proto
index 699d03270e0..d61bc6b545d 100644
--- a/proto/beacon/p2p/v1/types.proto
+++ b/proto/beacon/p2p/v1/types.proto
@@ -68,7 +68,7 @@ message AttestationData {
   uint64 shard = 2;
   bytes beacon_block_root_hash32 = 3;
   bytes epoch_boundary_root_hash32  = 4;
-  bytes shard_block_root_hash32 = 5;
+  bytes crosslink_data_root_hash32 = 5;
   Crosslink latest_crosslink = 6;
   uint64 justified_epoch = 7;
   bytes justified_block_root_hash32 = 8;
@@ -105,7 +105,7 @@ message ShardReassignmentRecord {
 
 message Crosslink {
   uint64 epoch = 1;
-  bytes shard_block_root_hash32 = 2;
+  bytes crosslink_data_root_hash32 = 2;
 }
 
 message BeaconBlock {
diff --git a/validator/client/validator_attest.go b/validator/client/validator_attest.go
index 365adfc1e09..e8519559a85 100644
--- a/validator/client/validator_attest.go
+++ b/validator/client/validator_attest.go
@@ -25,7 +25,7 @@ func (v *validator) AttestToBlockHead(ctx context.Context, slot uint64) {
 	// object based upon the state at the assigned slot.
 	attData := &pbp2p.AttestationData{
 		Slot:                 slot,
-		ShardBlockRootHash32: params.BeaconConfig().ZeroHash[:], // Stub for Phase 0.
+		CrosslinkDataRootHash32: params.BeaconConfig().ZeroHash[:], // Stub for Phase 0.
 	}
 	// We fetch the validator index as it is necessary to generate the aggregation
 	// bitfield of the attestation itself.
diff --git a/validator/client/validator_attest_test.go b/validator/client/validator_attest_test.go
index 55b75d0068f..0b17a5b73ea 100644
--- a/validator/client/validator_attest_test.go
+++ b/validator/client/validator_attest_test.go
@@ -136,7 +136,7 @@ func TestAttestToBlockHead_AttestsCorrectly(t *testing.T) {
 		BeaconBlockRootHash32:    []byte("A"),
 		EpochBoundaryRootHash32:  []byte("B"),
 		JustifiedBlockRootHash32: []byte("C"),
-		LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
+		LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
 		JustifiedEpoch:           3,
 	}, nil)
 
@@ -161,8 +161,8 @@ func TestAttestToBlockHead_AttestsCorrectly(t *testing.T) {
 			BeaconBlockRootHash32:    []byte("A"),
 			EpochBoundaryRootHash32:  []byte("B"),
 			JustifiedBlockRootHash32: []byte("C"),
-			LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
-			ShardBlockRootHash32:     params.BeaconConfig().ZeroHash[:],
+			LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
+			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
 			JustifiedEpoch:           3,
 		},
 		CustodyBitfield:     make([]byte, (len(committee)+7)/8),
@@ -204,7 +204,7 @@ func TestAttestToBlockHead_DoesNotAttestBeforeDelay(t *testing.T) {
 		BeaconBlockRootHash32:    []byte("A"),
 		EpochBoundaryRootHash32:  []byte("B"),
 		JustifiedBlockRootHash32: []byte("C"),
-		LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
+		LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
 		JustifiedEpoch:           3,
 	}, nil).Do(func(arg0, arg1 interface{}) {
 		wg.Done()
@@ -257,7 +257,7 @@ func TestAttestToBlockHead_DoesAttestAfterDelay(t *testing.T) {
 		BeaconBlockRootHash32:    []byte("A"),
 		EpochBoundaryRootHash32:  []byte("B"),
 		JustifiedBlockRootHash32: []byte("C"),
-		LatestCrosslink:          &pbp2p.Crosslink{ShardBlockRootHash32: []byte{'D'}},
+		LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
 		JustifiedEpoch:           3,
 	}, nil).Do(func(arg0, arg1 interface{}) {
 		wg.Done()

From 4829fbe9cc0f061a9fbc0850d8a3919020de1243 Mon Sep 17 00:00:00 2001
From: Terence Tsao <terence@prysmaticlabs.com>
Date: Wed, 27 Feb 2019 14:55:19 -0800
Subject: [PATCH 4/4] lint

---
 beacon-chain/core/blocks/block_operations.go      |  2 +-
 beacon-chain/core/blocks/block_operations_test.go |  6 +++---
 beacon-chain/core/epoch/epoch_operations_test.go  | 12 ++++++------
 beacon-chain/core/epoch/epoch_processing.go       |  2 +-
 beacon-chain/core/epoch/epoch_processing_test.go  |  2 +-
 beacon-chain/core/state/state.go                  |  2 +-
 beacon-chain/core/state/transition_test.go        |  4 ++--
 beacon-chain/core/validators/validator_test.go    |  8 ++++----
 beacon-chain/rpc/attester_server_test.go          |  4 ++--
 beacon-chain/sync/regular_sync_test.go            |  8 ++++----
 validator/client/validator_attest.go              |  2 +-
 validator/client/validator_attest_test.go         |  2 +-
 12 files changed, 27 insertions(+), 27 deletions(-)

diff --git a/beacon-chain/core/blocks/block_operations.go b/beacon-chain/core/blocks/block_operations.go
index f48202e6c29..82ca35c31df 100644
--- a/beacon-chain/core/blocks/block_operations.go
+++ b/beacon-chain/core/blocks/block_operations.go
@@ -486,7 +486,7 @@ func verifyAttestation(beaconState *pb.BeaconState, att *pb.Attestation, verifyS
 	shard := att.Data.Shard
 	crosslink := &pb.Crosslink{
 		CrosslinkDataRootHash32: att.Data.CrosslinkDataRootHash32,
-		Epoch:                helpers.SlotToEpoch(att.Data.Slot),
+		Epoch:                   helpers.SlotToEpoch(att.Data.Slot),
 	}
 	crosslinkFromAttestation := att.Data.LatestCrosslink
 	crosslinkFromState := beaconState.LatestCrosslinks[shard]
diff --git a/beacon-chain/core/blocks/block_operations_test.go b/beacon-chain/core/blocks/block_operations_test.go
index 7262649cc98..11bfa59e935 100644
--- a/beacon-chain/core/blocks/block_operations_test.go
+++ b/beacon-chain/core/blocks/block_operations_test.go
@@ -923,7 +923,7 @@ func TestProcessBlockAttestations_CrosslinkRootFailure(t *testing.T) {
 				Slot:                     params.BeaconConfig().GenesisSlot + 20,
 				JustifiedBlockRootHash32: blockRoots[0],
 				LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{2}},
-				CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
+				CrosslinkDataRootHash32:  params.BeaconConfig().ZeroHash[:],
 				JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			},
 		},
@@ -969,7 +969,7 @@ func TestProcessBlockAttestations_ShardBlockRootEqualZeroHashFailure(t *testing.
 				Slot:                     params.BeaconConfig().GenesisSlot + 20,
 				JustifiedBlockRootHash32: blockRoots[0],
 				LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
-				CrosslinkDataRootHash32:     []byte{1},
+				CrosslinkDataRootHash32:  []byte{1},
 				JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			},
 		},
@@ -1015,7 +1015,7 @@ func TestProcessBlockAttestations_CreatePendingAttestations(t *testing.T) {
 			Slot:                     params.BeaconConfig().GenesisSlot + 20,
 			JustifiedBlockRootHash32: blockRoots[0],
 			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
-			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
+			CrosslinkDataRootHash32:  params.BeaconConfig().ZeroHash[:],
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 		},
 		AggregationBitfield: []byte{1},
diff --git a/beacon-chain/core/epoch/epoch_operations_test.go b/beacon-chain/core/epoch/epoch_operations_test.go
index 454d34c0a3c..35bec4c2130 100644
--- a/beacon-chain/core/epoch/epoch_operations_test.go
+++ b/beacon-chain/core/epoch/epoch_operations_test.go
@@ -351,7 +351,7 @@ func TestWinningRoot_AccurateRoot(t *testing.T) {
 	for i := 0; i < 10; i++ {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
-				Slot:                 params.BeaconConfig().GenesisSlot,
+				Slot:                    params.BeaconConfig().GenesisSlot,
 				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			AggregationBitfield: participationBitfield,
@@ -379,7 +379,7 @@ func TestWinningRoot_EmptyParticipantBitfield(t *testing.T) {
 
 	attestations := []*pb.PendingAttestation{
 		{Data: &pb.AttestationData{
-			Slot:                 params.BeaconConfig().GenesisSlot,
+			Slot:                    params.BeaconConfig().GenesisSlot,
 			CrosslinkDataRootHash32: []byte{},
 		},
 			AggregationBitfield: []byte{},
@@ -399,7 +399,7 @@ func TestAttestingValidators_MatchActive(t *testing.T) {
 	for i := 0; i < 10; i++ {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
-				Slot:                 params.BeaconConfig().GenesisSlot,
+				Slot:                    params.BeaconConfig().GenesisSlot,
 				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			AggregationBitfield: []byte{0x03},
@@ -427,7 +427,7 @@ func TestAttestingValidators_EmptyWinningRoot(t *testing.T) {
 
 	attestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
-			Slot:                 params.BeaconConfig().GenesisSlot,
+			Slot:                    params.BeaconConfig().GenesisSlot,
 			CrosslinkDataRootHash32: []byte{},
 		},
 		AggregationBitfield: []byte{},
@@ -448,7 +448,7 @@ func TestTotalAttestingBalance_CorrectBalance(t *testing.T) {
 	for i := 0; i < 10; i++ {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
-				Slot:                 params.BeaconConfig().GenesisSlot,
+				Slot:                    params.BeaconConfig().GenesisSlot,
 				CrosslinkDataRootHash32: []byte{byte(i + 100)},
 			},
 			// All validators attested to the above roots.
@@ -476,7 +476,7 @@ func TestTotalAttestingBalance_EmptyWinningRoot(t *testing.T) {
 
 	attestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
-			Slot:                 params.BeaconConfig().GenesisSlot,
+			Slot:                    params.BeaconConfig().GenesisSlot,
 			CrosslinkDataRootHash32: []byte{},
 		},
 		AggregationBitfield: []byte{},
diff --git a/beacon-chain/core/epoch/epoch_processing.go b/beacon-chain/core/epoch/epoch_processing.go
index 05c5938b53b..cabfe7aebd2 100644
--- a/beacon-chain/core/epoch/epoch_processing.go
+++ b/beacon-chain/core/epoch/epoch_processing.go
@@ -213,7 +213,7 @@ func ProcessCrosslinks(
 					return nil, fmt.Errorf("could not get winning root: %v", err)
 				}
 				state.LatestCrosslinks[shard] = &pb.Crosslink{
-					Epoch:                currentEpoch,
+					Epoch:                   currentEpoch,
 					CrosslinkDataRootHash32: winningRoot,
 				}
 			}
diff --git a/beacon-chain/core/epoch/epoch_processing_test.go b/beacon-chain/core/epoch/epoch_processing_test.go
index 9710474f0ed..fab626d8996 100644
--- a/beacon-chain/core/epoch/epoch_processing_test.go
+++ b/beacon-chain/core/epoch/epoch_processing_test.go
@@ -256,7 +256,7 @@ func TestProcessCrosslinks_CrosslinksCorrectEpoch(t *testing.T) {
 	for i := 0; i < 10; i++ {
 		attestation := &pb.PendingAttestation{
 			Data: &pb.AttestationData{
-				Slot:                 state.Slot,
+				Slot:                    state.Slot,
 				CrosslinkDataRootHash32: []byte{'A'},
 			},
 			// All validators attested to the above roots.
diff --git a/beacon-chain/core/state/state.go b/beacon-chain/core/state/state.go
index 6b2084f204c..1f85929d7f7 100644
--- a/beacon-chain/core/state/state.go
+++ b/beacon-chain/core/state/state.go
@@ -51,7 +51,7 @@ func GenesisBeaconState(
 	latestCrosslinks := make([]*pb.Crosslink, params.BeaconConfig().ShardCount)
 	for i := 0; i < len(latestCrosslinks); i++ {
 		latestCrosslinks[i] = &pb.Crosslink{
-			Epoch:                params.BeaconConfig().GenesisEpoch,
+			Epoch:                   params.BeaconConfig().GenesisEpoch,
 			CrosslinkDataRootHash32: zeroHash,
 		}
 	}
diff --git a/beacon-chain/core/state/transition_test.go b/beacon-chain/core/state/transition_test.go
index de8a5faeee9..4fc5873bfbf 100644
--- a/beacon-chain/core/state/transition_test.go
+++ b/beacon-chain/core/state/transition_test.go
@@ -272,7 +272,7 @@ func TestProcessBlock_IncorrectProcessExits(t *testing.T) {
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			JustifiedBlockRootHash32: blockRoots[0],
 			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
-			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
+			CrosslinkDataRootHash32:  params.BeaconConfig().ZeroHash[:],
 		},
 		AggregationBitfield: []byte{1},
 		CustodyBitfield:     []byte{1},
@@ -364,7 +364,7 @@ func TestProcessBlock_PassesProcessingConditions(t *testing.T) {
 			JustifiedEpoch:           params.BeaconConfig().GenesisEpoch,
 			JustifiedBlockRootHash32: blockRoots[0],
 			LatestCrosslink:          &pb.Crosslink{CrosslinkDataRootHash32: []byte{1}},
-			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
+			CrosslinkDataRootHash32:  params.BeaconConfig().ZeroHash[:],
 		},
 		AggregationBitfield: []byte{1},
 		CustodyBitfield:     []byte{1},
diff --git a/beacon-chain/core/validators/validator_test.go b/beacon-chain/core/validators/validator_test.go
index adfeb607b6b..a35fff510e2 100644
--- a/beacon-chain/core/validators/validator_test.go
+++ b/beacon-chain/core/validators/validator_test.go
@@ -101,8 +101,8 @@ func TestAttestingValidatorIndices_OK(t *testing.T) {
 
 	prevAttestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
-			Slot:                 params.BeaconConfig().GenesisSlot + 3,
-			Shard:                6,
+			Slot:                    params.BeaconConfig().GenesisSlot + 3,
+			Shard:                   6,
 			CrosslinkDataRootHash32: []byte{'B'},
 		},
 		AggregationBitfield: []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1},
@@ -139,8 +139,8 @@ func TestAttestingValidatorIndices_OutOfBound(t *testing.T) {
 
 	attestation := &pb.PendingAttestation{
 		Data: &pb.AttestationData{
-			Slot:                 0,
-			Shard:                1,
+			Slot:                    0,
+			Shard:                   1,
 			CrosslinkDataRootHash32: []byte{'B'},
 		},
 		AggregationBitfield: []byte{'A'}, // 01000001 = 1,7
diff --git a/beacon-chain/rpc/attester_server_test.go b/beacon-chain/rpc/attester_server_test.go
index 0a4fa9a2992..672706a34ad 100644
--- a/beacon-chain/rpc/attester_server_test.go
+++ b/beacon-chain/rpc/attester_server_test.go
@@ -22,8 +22,8 @@ func TestAttestHead_OK(t *testing.T) {
 	}
 	req := &pbp2p.Attestation{
 		Data: &pbp2p.AttestationData{
-			Slot:                 999,
-			Shard:                1,
+			Slot:                    999,
+			Shard:                   1,
 			CrosslinkDataRootHash32: []byte{'a'},
 		},
 	}
diff --git a/beacon-chain/sync/regular_sync_test.go b/beacon-chain/sync/regular_sync_test.go
index 2b7139f32a8..3e5a6f74294 100644
--- a/beacon-chain/sync/regular_sync_test.go
+++ b/beacon-chain/sync/regular_sync_test.go
@@ -177,8 +177,8 @@ func TestProcessBlock_OK(t *testing.T) {
 	}
 	attestation := &pb.Attestation{
 		Data: &pb.AttestationData{
-			Slot:                 0,
-			Shard:                0,
+			Slot:                    0,
+			Shard:                   0,
 			CrosslinkDataRootHash32: []byte{'A'},
 		},
 	}
@@ -262,7 +262,7 @@ func TestProcessBlock_MultipleBlocks(t *testing.T) {
 		Attestation: &pb.Attestation{
 			Data: &pb.AttestationData{
 				CrosslinkDataRootHash32: []byte{},
-				Slot:                 params.BeaconConfig().GenesisSlot,
+				Slot:                    params.BeaconConfig().GenesisSlot,
 			},
 		},
 	}
@@ -287,7 +287,7 @@ func TestProcessBlock_MultipleBlocks(t *testing.T) {
 		Attestation: &pb.Attestation{
 			Data: &pb.AttestationData{
 				CrosslinkDataRootHash32: []byte{},
-				Slot:                 0,
+				Slot:                    0,
 			},
 		},
 	}
diff --git a/validator/client/validator_attest.go b/validator/client/validator_attest.go
index e8519559a85..612beb9da3b 100644
--- a/validator/client/validator_attest.go
+++ b/validator/client/validator_attest.go
@@ -24,7 +24,7 @@ func (v *validator) AttestToBlockHead(ctx context.Context, slot uint64) {
 	// First the validator should construct attestation_data, an AttestationData
 	// object based upon the state at the assigned slot.
 	attData := &pbp2p.AttestationData{
-		Slot:                 slot,
+		Slot:                    slot,
 		CrosslinkDataRootHash32: params.BeaconConfig().ZeroHash[:], // Stub for Phase 0.
 	}
 	// We fetch the validator index as it is necessary to generate the aggregation
diff --git a/validator/client/validator_attest_test.go b/validator/client/validator_attest_test.go
index 0b17a5b73ea..0a8ad2b2261 100644
--- a/validator/client/validator_attest_test.go
+++ b/validator/client/validator_attest_test.go
@@ -162,7 +162,7 @@ func TestAttestToBlockHead_AttestsCorrectly(t *testing.T) {
 			EpochBoundaryRootHash32:  []byte("B"),
 			JustifiedBlockRootHash32: []byte("C"),
 			LatestCrosslink:          &pbp2p.Crosslink{CrosslinkDataRootHash32: []byte{'D'}},
-			CrosslinkDataRootHash32:     params.BeaconConfig().ZeroHash[:],
+			CrosslinkDataRootHash32:  params.BeaconConfig().ZeroHash[:],
 			JustifiedEpoch:           3,
 		},
 		CustodyBitfield:     make([]byte, (len(committee)+7)/8),