diff --git a/ledger-tool/src/main.rs b/ledger-tool/src/main.rs
index f483adabd5..8b993fa7b7 100644
--- a/ledger-tool/src/main.rs
+++ b/ledger-tool/src/main.rs
@@ -127,7 +127,7 @@ fn main() {
                         exit(1);
                     }
                 }
-                last_id = entry.id;
+                last_id = entry.hash;
                 num_entries += 1;
 
                 if let Err(e) = blocktree_processor::process_entry(&bank, &entry) {
diff --git a/src/banking_stage.rs b/src/banking_stage.rs
index 8f4d72a374..41f8b95846 100644
--- a/src/banking_stage.rs
+++ b/src/banking_stage.rs
@@ -412,7 +412,7 @@ mod tests {
             .collect();
         assert!(entries.len() != 0);
         assert!(entries.verify(&start_hash));
-        assert_eq!(entries[entries.len() - 1].id, bank.last_id());
+        assert_eq!(entries[entries.len() - 1].hash, bank.last_id());
         banking_stage.join().unwrap();
         poh_service.close().unwrap();
     }
@@ -467,7 +467,7 @@ mod tests {
         entries.iter().for_each(|entries| {
             assert_eq!(entries.len(), 1);
             assert!(entries.verify(&last_id));
-            last_id = entries.last().unwrap().id;
+            last_id = entries.last().unwrap().hash;
         });
         drop(entry_receiver);
         banking_stage.join().unwrap();
diff --git a/src/blockstream.rs b/src/blockstream.rs
index 5f462de6fe..3b8de3eb21 100644
--- a/src/blockstream.rs
+++ b/src/blockstream.rs
@@ -180,7 +180,7 @@ mod test {
                 curr_slot += 1;
             }
             let entry = Entry::new(&mut last_id, 1, vec![]); // just ticks
-            last_id = entry.id;
+            last_id = entry.hash;
             blockstream
                 .emit_entry_event(curr_slot, tick_height, leader_id, &entry)
                 .unwrap();
diff --git a/src/blockstream_service.rs b/src/blockstream_service.rs
index 03c9f4795e..8ed792086c 100644
--- a/src/blockstream_service.rs
+++ b/src/blockstream_service.rs
@@ -85,7 +85,7 @@ impl BlockstreamService {
                 });
             if i == entries.len() - 1 {
                 blockstream
-                    .emit_block_event(slot, tick_height, slot_leader, entry.id)
+                    .emit_block_event(slot, tick_height, slot_leader, entry.hash)
                     .unwrap_or_else(|e| {
                         debug!("Blockstream error: {:?}, {:?}", e, blockstream.output);
                     });
@@ -138,10 +138,10 @@ mod test {
         let mut entries = create_ticks(4, Hash::default());
 
         let keypair = Keypair::new();
-        let mut last_id = entries[3].id;
+        let mut last_id = entries[3].hash;
         let tx = SystemTransaction::new_account(&keypair, keypair.pubkey(), 1, Hash::default(), 0);
         let entry = Entry::new(&mut last_id, 1, vec![tx]);
-        last_id = entry.id;
+        last_id = entry.hash;
         entries.push(entry);
         let final_tick = create_ticks(1, last_id);
         entries.extend_from_slice(&final_tick);
diff --git a/src/blocktree.rs b/src/blocktree.rs
index e78888770a..588d867b37 100644
--- a/src/blocktree.rs
+++ b/src/blocktree.rs
@@ -1279,7 +1279,7 @@ impl Iterator for EntryIterator {
                         }
                     }
                     self.db_iterator.next();
-                    self.last_id = Some(entry.id);
+                    self.last_id = Some(entry.hash);
                     return Some(entry);
                 }
             }
@@ -1301,7 +1301,7 @@ pub fn create_new_ledger(ledger_path: &str, genesis_block: &GenesisBlock) -> Res
     let entries = crate::entry::create_ticks(ticks_per_slot, genesis_block.last_id());
     blocktree.write_entries(0, 0, 0, &entries)?;
 
-    Ok(entries.last().unwrap().id)
+    Ok(entries.last().unwrap().hash)
 }
 
 pub fn genesis<'a, I>(ledger_path: &str, keypair: &Keypair, entries: I) -> Result<()>
@@ -1398,7 +1398,7 @@ pub fn tmp_copy_blocktree(from: &str, name: &str) -> String {
 pub mod tests {
     use super::*;
     use crate::entry::{
-        create_ticks, make_tiny_test_entries, make_tiny_test_entries_from_id, Entry, EntrySlice,
+        create_ticks, make_tiny_test_entries, make_tiny_test_entries_from_hash, Entry, EntrySlice,
     };
     use crate::packet::index_blobs;
     use rand::seq::SliceRandom;
@@ -1924,7 +1924,7 @@ pub mod tests {
 
     #[test]
     pub fn test_genesis_and_entry_iterator() {
-        let entries = make_tiny_test_entries_from_id(&Hash::default(), 10);
+        let entries = make_tiny_test_entries_from_hash(&Hash::default(), 10);
 
         let ledger_path = get_tmp_ledger_path("test_genesis_and_entry_iterator");
         {
@@ -1942,7 +1942,7 @@ pub mod tests {
     }
     #[test]
     pub fn test_entry_iterator_up_to_consumed() {
-        let entries = make_tiny_test_entries_from_id(&Hash::default(), 3);
+        let entries = make_tiny_test_entries_from_hash(&Hash::default(), 3);
         let ledger_path = get_tmp_ledger_path("test_genesis_and_entry_iterator");
         {
             // put entries except last 2 into ledger
diff --git a/src/blocktree_processor.rs b/src/blocktree_processor.rs
index e888cb9a29..34a8650e10 100644
--- a/src/blocktree_processor.rs
+++ b/src/blocktree_processor.rs
@@ -15,7 +15,7 @@ pub fn process_entry(bank: &Bank, entry: &Entry) -> Result<()> {
     if !entry.is_tick() {
         first_err(&bank.process_transactions(&entry.transactions))?;
     } else {
-        bank.register_tick(&entry.id);
+        bank.register_tick(&entry.hash);
     }
     Ok(())
 }
@@ -57,7 +57,7 @@ fn par_process_entries(bank: &Bank, entries: &[Entry]) -> Result<()> {
         if entry.is_tick() {
             // if its a tick, execute the group and register the tick
             par_execute_entries(bank, &mt_group)?;
-            bank.register_tick(&entry.id);
+            bank.register_tick(&entry.hash);
             mt_group = vec![];
             continue;
         }
@@ -159,7 +159,7 @@ pub fn process_blocktree(
                 warn!("Ledger proof of history failed at entry0");
                 return Err(BankError::LedgerVerificationFailed);
             }
-            last_entry_hash = entry0.id;
+            last_entry_hash = entry0.hash;
             entry_height += 1;
             entries = entries.drain(1..).collect();
         }
@@ -175,7 +175,7 @@ pub fn process_blocktree(
                 BankError::LedgerVerificationFailed
             })?;
 
-            last_entry_hash = entries.last().unwrap().id;
+            last_entry_hash = entries.last().unwrap().hash;
             entry_height += entries.len() as u64;
         }
 
@@ -201,7 +201,7 @@ pub fn process_blocktree(
         bank.squash();
 
         if meta.next_slots.is_empty() {
-            // Reached the end of this fork.  Record the final entry height and last entry id
+            // Reached the end of this fork.  Record the final entry height and last entry.hash
 
             let bfi = BankForksInfo {
                 bank_id: slot,
@@ -258,7 +258,7 @@ mod tests {
         last_entry_hash: Hash,
     ) -> Hash {
         let entries = create_ticks(ticks_per_slot, last_entry_hash);
-        let last_entry_hash = entries.last().unwrap().id;
+        let last_entry_hash = entries.last().unwrap().hash;
 
         let blobs = entries_to_blobs(&entries, slot, parent_slot);
         blocktree.insert_data_blobs(blobs.iter()).unwrap();
@@ -298,7 +298,7 @@ mod tests {
             let parent_slot = 0;
             let slot = 1;
             let mut entries = create_ticks(ticks_per_slot, last_id);
-            last_id = entries.last().unwrap().id;
+            last_id = entries.last().unwrap().hash;
 
             entries.pop();
 
@@ -352,19 +352,19 @@ mod tests {
             .expect("Expected to successfully open database ledger");
 
         // Fork 1, ending at slot 3
-        let last_slot1_entry_id =
+        let last_slot1_entry_hash =
             fill_blocktree_slot_with_ticks(&blocktree, ticks_per_slot, 1, 0, last_entry_hash);
         last_entry_hash =
-            fill_blocktree_slot_with_ticks(&blocktree, ticks_per_slot, 2, 1, last_slot1_entry_id);
-        let last_fork1_entry_id =
+            fill_blocktree_slot_with_ticks(&blocktree, ticks_per_slot, 2, 1, last_slot1_entry_hash);
+        let last_fork1_entry_hash =
             fill_blocktree_slot_with_ticks(&blocktree, ticks_per_slot, 3, 2, last_entry_hash);
 
         // Fork 2, ending at slot 4
-        let last_fork2_entry_id =
-            fill_blocktree_slot_with_ticks(&blocktree, ticks_per_slot, 4, 1, last_slot1_entry_id);
+        let last_fork2_entry_hash =
+            fill_blocktree_slot_with_ticks(&blocktree, ticks_per_slot, 4, 1, last_slot1_entry_hash);
 
-        info!("last_fork1_entry_id: {:?}", last_fork1_entry_id);
-        info!("last_fork2_entry_id: {:?}", last_fork2_entry_id);
+        info!("last_fork1_entry.hash: {:?}", last_fork1_entry_hash);
+        info!("last_fork2_entry.hash: {:?}", last_fork2_entry_hash);
 
         let (bank_forks, bank_forks_info) =
             process_blocktree(&genesis_block, &blocktree, None).unwrap();
@@ -430,7 +430,7 @@ mod tests {
         let bank = Bank::new(&genesis_block);
         let keypair = Keypair::new();
         let entry = next_entry(&genesis_block.last_id(), 1, vec![]);
-        let tx = SystemTransaction::new_account(&mint_keypair, keypair.pubkey(), 1, entry.id, 0);
+        let tx = SystemTransaction::new_account(&mint_keypair, keypair.pubkey(), 1, entry.hash, 0);
 
         // First, ensure the TX is rejected because of the unregistered last ID
         assert_eq!(
@@ -457,7 +457,7 @@ mod tests {
             let keypair = Keypair::new();
             let tx = SystemTransaction::new_account(&mint_keypair, keypair.pubkey(), 1, last_id, 0);
             let entry = Entry::new(&last_entry_hash, 1, vec![tx]);
-            last_entry_hash = entry.id;
+            last_entry_hash = entry.hash;
             entries.push(entry);
 
             // Add a second Transaction that will produce a
@@ -465,7 +465,7 @@ mod tests {
             let keypair2 = Keypair::new();
             let tx = SystemTransaction::new_account(&keypair, keypair2.pubkey(), 42, last_id, 0);
             let entry = Entry::new(&last_entry_hash, 1, vec![tx]);
-            last_entry_hash = entry.id;
+            last_entry_hash = entry.hash;
             entries.push(entry);
         }
 
@@ -491,7 +491,7 @@ mod tests {
         let bank = bank_forks[1].clone();
         assert_eq!(bank.get_balance(&mint_keypair.pubkey()), 50 - 3);
         assert_eq!(bank.tick_height(), 2 * genesis_block.ticks_per_slot - 1);
-        assert_eq!(bank.last_id(), entries.last().unwrap().id);
+        assert_eq!(bank.last_id(), entries.last().unwrap().hash);
     }
 
     #[test]
@@ -524,7 +524,7 @@ mod tests {
         // ensure bank can process a tick
         let tick = next_entry(&genesis_block.last_id(), 1, vec![]);
         assert_eq!(par_process_entries(&bank, &[tick.clone()]), Ok(()));
-        assert_eq!(bank.last_id(), tick.id);
+        assert_eq!(bank.last_id(), tick.hash);
     }
 
     #[test]
@@ -542,7 +542,7 @@ mod tests {
         let entry_1 = next_entry(&last_id, 1, vec![tx]);
         let tx =
             SystemTransaction::new_account(&mint_keypair, keypair2.pubkey(), 2, bank.last_id(), 0);
-        let entry_2 = next_entry(&entry_1.id, 1, vec![tx]);
+        let entry_2 = next_entry(&entry_1.hash, 1, vec![tx]);
         assert_eq!(par_process_entries(&bank, &[entry_1, entry_2]), Ok(()));
         assert_eq!(bank.get_balance(&keypair1.pubkey()), 2);
         assert_eq!(bank.get_balance(&keypair2.pubkey()), 2);
@@ -581,7 +581,7 @@ mod tests {
         );
 
         let entry_2_to_3_mint_to_1 = next_entry(
-            &entry_1_to_mint.id,
+            &entry_1_to_mint.hash,
             1,
             vec![
                 SystemTransaction::new_account(&keypair2, keypair3.pubkey(), 2, bank.last_id(), 0), // should be fine
@@ -627,7 +627,7 @@ mod tests {
         let tx = SystemTransaction::new_account(&keypair1, keypair3.pubkey(), 1, bank.last_id(), 0);
         let entry_1 = next_entry(&last_id, 1, vec![tx]);
         let tx = SystemTransaction::new_account(&keypair2, keypair4.pubkey(), 1, bank.last_id(), 0);
-        let entry_2 = next_entry(&entry_1.id, 1, vec![tx]);
+        let entry_2 = next_entry(&entry_1.hash, 1, vec![tx]);
         assert_eq!(par_process_entries(&bank, &[entry_1, entry_2]), Ok(()));
         assert_eq!(bank.get_balance(&keypair3.pubkey()), 1);
         assert_eq!(bank.get_balance(&keypair4.pubkey()), 1);
@@ -656,19 +656,19 @@ mod tests {
         // ensure bank can process 2 entries that do not have a common account and tick is registered
         let tx = SystemTransaction::new_account(&keypair2, keypair3.pubkey(), 1, bank.last_id(), 0);
         let entry_1 = next_entry(&last_id, 1, vec![tx]);
-        let tick = next_entry(&entry_1.id, 1, vec![]);
-        let tx = SystemTransaction::new_account(&keypair1, keypair4.pubkey(), 1, tick.id, 0);
-        let entry_2 = next_entry(&tick.id, 1, vec![tx]);
+        let tick = next_entry(&entry_1.hash, 1, vec![]);
+        let tx = SystemTransaction::new_account(&keypair1, keypair4.pubkey(), 1, tick.hash, 0);
+        let entry_2 = next_entry(&tick.hash, 1, vec![tx]);
         assert_eq!(
             par_process_entries(&bank, &[entry_1.clone(), tick.clone(), entry_2.clone()]),
             Ok(())
         );
         assert_eq!(bank.get_balance(&keypair3.pubkey()), 1);
         assert_eq!(bank.get_balance(&keypair4.pubkey()), 1);
-        assert_eq!(bank.last_id(), tick.id);
+        assert_eq!(bank.last_id(), tick.hash);
         // ensure that an error is returned for an empty account (keypair2)
-        let tx = SystemTransaction::new_account(&keypair2, keypair3.pubkey(), 1, tick.id, 0);
-        let entry_3 = next_entry(&entry_2.id, 1, vec![tx]);
+        let tx = SystemTransaction::new_account(&keypair2, keypair3.pubkey(), 1, tick.hash, 0);
+        let entry_3 = next_entry(&entry_2.hash, 1, vec![tx]);
         assert_eq!(
             par_process_entries(&bank, &[entry_3]),
             Err(BankError::AccountNotFound)
diff --git a/src/entry.rs b/src/entry.rs
index 2160306670..ac2228510c 100644
--- a/src/entry.rs
+++ b/src/entry.rs
@@ -9,7 +9,7 @@ use bincode::{deserialize, serialize_into, serialized_size};
 use chrono::prelude::Utc;
 use rayon::prelude::*;
 use solana_sdk::budget_transaction::BudgetTransaction;
-use solana_sdk::hash::{hash, Hash};
+use solana_sdk::hash::Hash;
 use solana_sdk::pubkey::Pubkey;
 use solana_sdk::signature::{Keypair, KeypairUtil};
 use solana_sdk::transaction::Transaction;
@@ -25,9 +25,9 @@ pub type EntrySender = Sender<Vec<Entry>>;
 pub type EntryReceiver = Receiver<Vec<Entry>>;
 
 /// Each Entry contains three pieces of data. The `num_hashes` field is the number
-/// of hashes performed since the previous entry.  The `id` field is the result
-/// of hashing `id` from the previous entry `num_hashes` times.  The `transactions`
-/// field points to Transactions that took place shortly before `id` was generated.
+/// of hashes performed since the previous entry.  The `hash` field is the result
+/// of hashing `hash` from the previous entry `num_hashes` times.  The `transactions`
+/// field points to Transactions that took place shortly before `hash` was generated.
 ///
 /// If you divide `num_hashes` by the amount of time it takes to generate a new hash, you
 /// get a duration estimate since the last Entry. Since processing power increases
@@ -45,7 +45,7 @@ pub struct Entry {
     pub num_hashes: u64,
 
     /// The SHA-256 hash `num_hashes` after the previous Entry ID.
-    pub id: Hash,
+    pub hash: Hash,
 
     /// An unordered list of transactions that were observed before the Entry ID was
     /// generated. They may have been observed before a previous Entry ID but were
@@ -60,26 +60,26 @@ impl Entry {
             if num_hashes == 0 && transactions.is_empty() {
                 Entry {
                     num_hashes: 0,
-                    id: *prev_hash,
+                    hash: *prev_hash,
                     transactions,
                 }
             } else if num_hashes == 0 {
                 // If you passed in transactions, but passed in num_hashes == 0, then
                 // next_hash will generate the next hash and set num_hashes == 1
-                let id = next_hash(prev_hash, 1, &transactions);
+                let hash = next_hash(prev_hash, 1, &transactions);
                 Entry {
                     num_hashes: 1,
-                    id,
+                    hash,
                     transactions,
                 }
             } else {
                 // Otherwise, the next Entry `num_hashes` after `start_hash`.
                 // If you wanted a tick for instance, then pass in num_hashes = 1
                 // and transactions = empty
-                let id = next_hash(prev_hash, num_hashes, &transactions);
+                let hash = next_hash(prev_hash, num_hashes, &transactions);
                 Entry {
                     num_hashes,
-                    id,
+                    hash,
                     transactions,
                 }
             }
@@ -118,7 +118,7 @@ impl Entry {
             .iter()
             .map(|tx| tx.serialized_size().unwrap())
             .sum();
-        // num_hashes   +    id  +              txs
+        // num_hashes   +    hash  +              txs
         (2 * size_of::<u64>() + size_of::<Hash>()) as u64 + txs_size
     }
 
@@ -165,32 +165,32 @@ impl Entry {
         transactions: Vec<Transaction>,
     ) -> Self {
         let entry = Self::new(start_hash, *num_hashes, transactions);
-        *start_hash = entry.id;
+        *start_hash = entry.hash;
         *num_hashes = 0;
         assert!(serialized_size(&entry).unwrap() <= BLOB_DATA_SIZE as u64);
         entry
     }
 
     /// Creates a Entry from the number of hashes `num_hashes`
-    /// since the previous transaction and that resulting `id`.
+    /// since the previous transaction and that resulting `hash`.
 
     #[cfg(test)]
-    pub fn new_tick(num_hashes: u64, id: &Hash) -> Self {
+    pub fn new_tick(num_hashes: u64, hash: &Hash) -> Self {
         Entry {
             num_hashes,
-            id: *id,
+            hash: *hash,
             transactions: vec![],
         }
     }
 
-    /// Verifies self.id is the result of hashing a `start_hash` `self.num_hashes` times.
+    /// Verifies self.hash is the result of hashing a `start_hash` `self.num_hashes` times.
     /// If the transaction is not a Tick, then hash that as well.
     pub fn verify(&self, start_hash: &Hash) -> bool {
         let ref_hash = next_hash(start_hash, self.num_hashes, &self.transactions);
-        if self.id != ref_hash {
+        if self.hash != ref_hash {
             warn!(
                 "next_hash is invalid expected: {:?} actual: {:?}",
-                self.id, ref_hash
+                self.hash, ref_hash
             );
             return false;
         }
@@ -259,17 +259,17 @@ impl EntrySlice for [Entry] {
     fn verify(&self, start_hash: &Hash) -> bool {
         let genesis = [Entry {
             num_hashes: 0,
-            id: *start_hash,
+            hash: *start_hash,
             transactions: vec![],
         }];
         let entry_pairs = genesis.par_iter().chain(self).zip(self);
         entry_pairs.all(|(x0, x1)| {
-            let r = x1.verify(&x0.id);
+            let r = x1.verify(&x0.hash);
             if !r {
                 warn!(
                     "entry invalid!: x0: {:?}, x1: {:?} num txs: {}",
-                    x0.id,
-                    x1.id,
+                    x0.hash,
+                    x1.hash,
                     x1.transactions.len()
                 );
             }
@@ -299,12 +299,12 @@ impl EntrySlice for [Entry] {
 
 pub fn next_entry_mut(start: &mut Hash, num_hashes: u64, transactions: Vec<Transaction>) -> Entry {
     let entry = Entry::new(&start, num_hashes, transactions);
-    *start = entry.id;
+    *start = entry.hash;
     entry
 }
 
 /// Creates the next entries for given transactions, outputs
-/// updates start_hash to id of last Entry, sets num_hashes to 0
+/// updates start_hash to hash of last Entry, sets num_hashes to 0
 pub fn next_entries_mut(
     start_hash: &mut Hash,
     num_hashes: &mut u64,
@@ -373,9 +373,9 @@ pub fn next_entries(
     num_hashes: u64,
     transactions: Vec<Transaction>,
 ) -> Vec<Entry> {
-    let mut id = *start_hash;
+    let mut hash = *start_hash;
     let mut num_hashes = num_hashes;
-    next_entries_mut(&mut id, &mut num_hashes, transactions)
+    next_entries_mut(&mut hash, &mut num_hashes, transactions)
 }
 
 pub fn create_ticks(num_ticks: u64, mut hash: Hash) -> Vec<Entry> {
@@ -388,15 +388,15 @@ pub fn create_ticks(num_ticks: u64, mut hash: Hash) -> Vec<Entry> {
     ticks
 }
 
-pub fn make_tiny_test_entries_from_id(start: &Hash, num: usize) -> Vec<Entry> {
+pub fn make_tiny_test_entries_from_hash(start: &Hash, num: usize) -> Vec<Entry> {
     let keypair = Keypair::new();
 
-    let mut id = *start;
+    let mut hash = *start;
     let mut num_hashes = 0;
     (0..num)
         .map(|_| {
             Entry::new_mut(
-                &mut id,
+                &mut hash,
                 &mut num_hashes,
                 vec![BudgetTransaction::new_timestamp(
                     &keypair,
@@ -412,13 +412,13 @@ pub fn make_tiny_test_entries_from_id(start: &Hash, num: usize) -> Vec<Entry> {
 
 pub fn make_tiny_test_entries(num: usize) -> Vec<Entry> {
     let zero = Hash::default();
-    let one = hash(&zero.as_ref());
-    make_tiny_test_entries_from_id(&one, num)
+    let one = solana_sdk::hash::hash(&zero.as_ref());
+    make_tiny_test_entries_from_hash(&one, num)
 }
 
 pub fn make_large_test_entries(num_entries: usize) -> Vec<Entry> {
     let zero = Hash::default();
-    let one = hash(&zero.as_ref());
+    let one = solana_sdk::hash::hash(&zero.as_ref());
     let keypair = Keypair::new();
 
     let tx = BudgetTransaction::new_timestamp(
@@ -465,7 +465,7 @@ pub fn next_entry(prev_hash: &Hash, num_hashes: u64, transactions: Vec<Transacti
     assert!(num_hashes > 0 || transactions.is_empty());
     Entry {
         num_hashes,
-        id: next_hash(prev_hash, num_hashes, &transactions),
+        hash: next_hash(prev_hash, num_hashes, &transactions),
         transactions,
     }
 }
@@ -536,11 +536,11 @@ mod tests {
         let zero = Hash::default();
         let tick = next_entry(&zero, 1, vec![]);
         assert_eq!(tick.num_hashes, 1);
-        assert_ne!(tick.id, zero);
+        assert_ne!(tick.hash, zero);
 
         let tick = next_entry(&zero, 0, vec![]);
         assert_eq!(tick.num_hashes, 0);
-        assert_eq!(tick.id, zero);
+        assert_eq!(tick.hash, zero);
 
         let keypair = Keypair::new();
         let tx0 = BudgetTransaction::new_timestamp(
@@ -552,7 +552,7 @@ mod tests {
         );
         let entry0 = next_entry(&zero, 1, vec![tx0.clone()]);
         assert_eq!(entry0.num_hashes, 1);
-        assert_eq!(entry0.id, next_hash(&zero, 1, &vec![tx0]));
+        assert_eq!(entry0.hash, next_hash(&zero, 1, &vec![tx0]));
     }
 
     #[test]
@@ -587,7 +587,7 @@ mod tests {
         assert!(vec![next_entry(&zero, 0, vec![]); 2][..].verify(&zero)); // inductive step
 
         let mut bad_ticks = vec![next_entry(&zero, 0, vec![]); 2];
-        bad_ticks[1].id = one;
+        bad_ticks[1].hash = one;
         assert!(!bad_ticks.verify(&zero)); // inductive step, bad
     }
 
@@ -640,8 +640,8 @@ mod tests {
     #[test]
     fn test_next_entries() {
         solana_logger::setup();
-        let id = Hash::default();
-        let next_hash = hash(&id.as_ref());
+        let hash = Hash::default();
+        let next_hash = solana_sdk::hash::hash(&hash.as_ref());
         let keypair = Keypair::new();
         let vote_account = Keypair::new();
         let tx_small = VoteTransaction::new_vote(&vote_account, 1, next_hash, 2);
@@ -651,7 +651,7 @@ mod tests {
         let tx_large_size = tx_large.serialized_size().unwrap() as usize;
         let entry_size = serialized_size(&Entry {
             num_hashes: 0,
-            id: Hash::default(),
+            hash: Hash::default(),
             transactions: vec![],
         })
         .unwrap() as usize;
@@ -662,15 +662,15 @@ mod tests {
 
         // verify no split
         let transactions = vec![tx_small.clone(); threshold];
-        let entries0 = next_entries(&id, 0, transactions.clone());
+        let entries0 = next_entries(&hash, 0, transactions.clone());
         assert_eq!(entries0.len(), 1);
-        assert!(entries0.verify(&id));
+        assert!(entries0.verify(&hash));
 
         // verify the split with uniform transactions
         let transactions = vec![tx_small.clone(); threshold * 2];
-        let entries0 = next_entries(&id, 0, transactions.clone());
+        let entries0 = next_entries(&hash, 0, transactions.clone());
         assert_eq!(entries0.len(), 2);
-        assert!(entries0.verify(&id));
+        assert!(entries0.verify(&hash));
 
         // verify the split with small transactions followed by large
         // transactions
@@ -679,9 +679,9 @@ mod tests {
 
         transactions.extend(large_transactions);
 
-        let entries0 = next_entries(&id, 0, transactions.clone());
+        let entries0 = next_entries(&hash, 0, transactions.clone());
         assert!(entries0.len() >= 2);
-        assert!(entries0.verify(&id));
+        assert!(entries0.verify(&hash));
     }
 
 }
diff --git a/src/fullnode.rs b/src/fullnode.rs
index df2afb0479..e4ec336fbe 100644
--- a/src/fullnode.rs
+++ b/src/fullnode.rs
@@ -785,7 +785,7 @@ mod tests {
         );
 
         let blocktree = Blocktree::open_config(&ledger_path, ticks_per_slot).unwrap();
-        let last_id = entries.last().unwrap().id;
+        let last_id = entries.last().unwrap().hash;
         let entry_height = ticks_per_slot + entries.len() as u64;
         blocktree.write_entries(1, 0, 0, entries).unwrap();
 
diff --git a/src/poh_recorder.rs b/src/poh_recorder.rs
index c88894dbe6..48474acc5d 100644
--- a/src/poh_recorder.rs
+++ b/src/poh_recorder.rs
@@ -102,7 +102,7 @@ impl PohRecorder {
             );
             let cache = &self.tick_cache[..cnt];
             for t in cache {
-                working_bank.bank.register_tick(&t.0.id);
+                working_bank.bank.register_tick(&t.0.hash);
             }
             working_bank.sender.send(cache.to_vec())
         } else {
@@ -162,7 +162,7 @@ impl PohRecorder {
         assert!(!txs.is_empty(), "Entries without transactions are used to track real-time passing in the ledger and can only be generated with PohRecorder::tick function");
         let recorded_entry = Entry {
             num_hashes: entry.num_hashes,
-            id: entry.id,
+            hash: entry.id,
             transactions: txs,
         };
         trace!("sending entry {}", recorded_entry.is_tick());
@@ -178,7 +178,7 @@ impl PohRecorder {
         (
             Entry {
                 num_hashes: tick.num_hashes,
-                id: tick.id,
+                hash: tick.id,
                 transactions: vec![],
             },
             tick.tick_height,
diff --git a/src/replay_stage.rs b/src/replay_stage.rs
index 66c09c3f58..9c8635642c 100644
--- a/src/replay_stage.rs
+++ b/src/replay_stage.rs
@@ -138,7 +138,7 @@ impl ReplayStage {
         *last_entry_hash = entries
             .last()
             .expect("Entries cannot be empty at this point")
-            .id;
+            .hash;
 
         inc_new_counter_info!(
             "replicate-transactions",
@@ -338,7 +338,7 @@ impl ReplayStage {
                             let last_entry = blocktree
                                 .get_slot_entries(slot, meta.last_index, Some(1))
                                 .unwrap();
-                            last_entry_hash = last_entry[0].id;
+                            last_entry_hash = last_entry[0].hash;
                         }
 
                         let old_bank = bank.clone();
diff --git a/src/storage_stage.rs b/src/storage_stage.rs
index a508393c0c..1af789fb4f 100644
--- a/src/storage_stage.rs
+++ b/src/storage_stage.rs
@@ -421,7 +421,7 @@ impl StorageStage {
                     &storage_state,
                     &keypair,
                     &blocktree,
-                    entry.id,
+                    entry.hash,
                     *entry_height,
                     tx_sender,
                 )?;
diff --git a/tests/multinode.rs b/tests/multinode.rs
index 6fe4a1f007..de3b4beed8 100644
--- a/tests/multinode.rs
+++ b/tests/multinode.rs
@@ -1313,7 +1313,7 @@ fn test_full_leader_validator_network() {
             &last_id,
             ticks_per_slot,
         );
-        last_id = node_active_set_entries.last().unwrap().id;
+        last_id = node_active_set_entries.last().unwrap().hash;
         active_set_entries.extend(node_active_set_entries);
     }
 
@@ -1702,7 +1702,7 @@ fn stake_fullnode(
 
 fn add_tick(last_id: &mut Hash, entries: &mut Vec<Entry>) -> Hash {
     let tick = solana::entry::create_ticks(1, *last_id);
-    *last_id = tick[0].id;
+    *last_id = tick[0].hash;
     entries.extend(tick);
     *last_id
 }
diff --git a/tests/replicator.rs b/tests/replicator.rs
index d4ad0119af..cadc506afc 100644
--- a/tests/replicator.rs
+++ b/tests/replicator.rs
@@ -177,7 +177,7 @@ fn test_replicator_startup_basic() {
                     assert!(br.index() == repair_index);
                     let entry: Entry = deserialize(&br.data()[..br.meta.size]).unwrap();
                     info!("entry: {:?}", entry);
-                    assert_ne!(entry.id, Hash::default());
+                    assert_ne!(entry.hash, Hash::default());
                     received_blob = true;
                 }
                 break;