From ca489630325aebffca2a425fe1a5b69573140e6e Mon Sep 17 00:00:00 2001
From: Hsiao-Wei Wang <hwwang156@gmail.com>
Date: Thu, 28 May 2020 21:38:11 +0800
Subject: [PATCH] Rename `head_shard_root` to `shard_head_root`

---
 specs/phase1/beacon-chain.md                            | 4 ++--
 tests/core/pyspec/eth2spec/test/helpers/attestations.py | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/specs/phase1/beacon-chain.md b/specs/phase1/beacon-chain.md
index 0ae4bae2b..bc5a6385c 100644
--- a/specs/phase1/beacon-chain.md
+++ b/specs/phase1/beacon-chain.md
@@ -130,7 +130,7 @@ class AttestationData(Container):
     source: Checkpoint
     target: Checkpoint
     # Current-slot shard block root
-    head_shard_root: Root
+    shard_head_root: Root
     # Shard transition root
     shard_transition_root: Root
 ```
@@ -823,7 +823,7 @@ def process_crosslink_for_shard(state: BeaconState,
         for attestation in transition_attestations:
             participants = get_attesting_indices(state, attestation.data, attestation.aggregation_bits)
             transition_participants = transition_participants.union(participants)
-            assert attestation.data.head_shard_root == shard_transition.shard_data_roots[
+            assert attestation.data.shard_head_root == shard_transition.shard_data_roots[
                 len(shard_transition.shard_data_roots) - 1
             ]
 
diff --git a/tests/core/pyspec/eth2spec/test/helpers/attestations.py b/tests/core/pyspec/eth2spec/test/helpers/attestations.py
index 4d246c8c6..c533182ef 100644
--- a/tests/core/pyspec/eth2spec/test/helpers/attestations.py
+++ b/tests/core/pyspec/eth2spec/test/helpers/attestations.py
@@ -78,7 +78,7 @@ def build_attestation_data(spec, state, slot, index, shard_transition=None, on_t
     if spec.fork == PHASE1:
         if shard_transition is not None:
             lastest_shard_data_root_index = len(shard_transition.shard_data_roots) - 1
-            attestation_data.head_shard_root = shard_transition.shard_data_roots[lastest_shard_data_root_index]
+            attestation_data.shard_head_root = shard_transition.shard_data_roots[lastest_shard_data_root_index]
             attestation_data.shard_transition_root = shard_transition.hash_tree_root()
         else:
             # No shard transition
@@ -88,10 +88,10 @@ def build_attestation_data(spec, state, slot, index, shard_transition=None, on_t
                 next_slot(spec, temp_state)
                 shard_transition = spec.get_shard_transition(temp_state, shard, [])
                 lastest_shard_data_root_index = len(shard_transition.shard_data_roots) - 1
-                attestation_data.head_shard_root = shard_transition.shard_data_roots[lastest_shard_data_root_index]
+                attestation_data.shard_head_root = shard_transition.shard_data_roots[lastest_shard_data_root_index]
                 attestation_data.shard_transition_root = shard_transition.hash_tree_root()
             else:
-                attestation_data.head_shard_root = state.shard_states[shard].transition_digest
+                attestation_data.shard_head_root = state.shard_states[shard].transition_digest
                 attestation_data.shard_transition_root = spec.Root()
     return attestation_data