Rename chain.canonical_head to head

beacon_node/beacon_chain/src/block_processing.rs

@@ -121,7 +121,7 @@ where
         // If the parent block was the parent_block, automatically update the canonical head.
         //
         // TODO: this is a first-in-best-dressed scenario that is not ideal -- find a solution.
-        if self.canonical_head().beacon_block_root == parent_block_root {
+        if self.head().beacon_block_root == parent_block_root {
             self.update_canonical_head(
                 block.clone(),
                 block_root.clone(),

beacon_node/beacon_chain/src/block_production.rs

@@ -33,7 +33,7 @@ where
             .map_err(|e| e.into())?
             .ok_or(Error::PresentSlotIsNone)?;
 
-        let parent_root = self.canonical_head().beacon_block_root;
+        let parent_root = self.head().beacon_block_root;
         let parent_block_reader = self
             .block_store
             .get_reader(&parent_root)?

beacon_node/beacon_chain/src/canonical_head.rs

@@ -19,11 +19,11 @@ where
         new_beacon_state: BeaconState,
         new_beacon_state_root: Hash256,
     ) {
-        let mut canonical_head = self
+        let mut head = self
             .canonical_head
             .write()
             .expect("CRITICAL: CanonicalHead poisioned.");
-        canonical_head.update(
+        head.update(
             new_beacon_block,
             new_beacon_block_root,
             new_beacon_state,
@@ -31,7 +31,7 @@ where
         );
     }
 
-    pub fn canonical_head(&self) -> RwLockReadGuard<CheckPoint> {
+    pub fn head(&self) -> RwLockReadGuard<CheckPoint> {
         self.canonical_head
             .read()
             .expect("CRITICAL: CanonicalHead poisioned.")

beacon_node/beacon_chain/src/dump.rs

@@ -25,10 +25,10 @@ where
         let mut dump = vec![];
 
         let mut last_slot = SlotDump {
-            beacon_block: self.canonical_head().beacon_block.clone(),
+            beacon_block: self.head().beacon_block.clone(),
-            beacon_block_root: self.canonical_head().beacon_block_root,
+            beacon_block_root: self.head().beacon_block_root,
-            beacon_state: self.canonical_head().beacon_state.clone(),
+            beacon_state: self.head().beacon_state.clone(),
-            beacon_state_root: self.canonical_head().beacon_state_root,
+            beacon_state_root: self.head().beacon_state_root,
         };
 
         dump.push(last_slot.clone());

beacon_node/beacon_chain/src/info.rs

@@ -8,7 +8,7 @@ where
 {
     pub fn validator_index(&self, pubkey: &PublicKey) -> Option<usize> {
         for (i, validator) in self
-            .canonical_head()
+            .head()
             .beacon_state
             .validator_registry
             .iter()