diff --git a/src/bank.rs b/src/bank.rs
index 962daee56c..fb39f194d3 100644
--- a/src/bank.rs
+++ b/src/bank.rs
@@ -14,7 +14,7 @@ use ledger::Block;
 use log::Level;
 use mint::Mint;
 use payment_plan::{Payment, PaymentPlan, Witness};
-use signature::{Keypair, PublicKey, Signature};
+use signature::{Keypair, Pubkey, Signature};
 use std::collections::hash_map::Entry::Occupied;
 use std::collections::{HashMap, HashSet, VecDeque};
 use std::result;
@@ -38,13 +38,13 @@ pub const VERIFY_BLOCK_SIZE: usize = 16;
 /// Reasons a transaction might be rejected.
 #[derive(Debug, PartialEq, Eq)]
 pub enum BankError {
-    /// Attempt to debit from `PublicKey`, but no found no record of a prior credit.
-    AccountNotFound(PublicKey),
+    /// Attempt to debit from `Pubkey`, but no found no record of a prior credit.
+    AccountNotFound(Pubkey),
 
-    /// The requested debit from `PublicKey` has the potential to draw the balance
+    /// The requested debit from `Pubkey` has the potential to draw the balance
     /// below zero. This can occur when a debit and credit are processed in parallel.
     /// The bank may reject the debit or push it to a future entry.
-    InsufficientFunds(PublicKey),
+    InsufficientFunds(Pubkey),
 
     /// The bank has seen `Signature` before. This can occur under normal operation
     /// when a UDP packet is duplicated, as a user error from a client not updating
@@ -68,7 +68,7 @@ pub type Result<T> = result::Result<T, BankError>;
 /// The state of all accounts and contracts after processing its entries.
 pub struct Bank {
     /// A map of account public keys to the balance in that account.
-    balances: RwLock<HashMap<PublicKey, i64>>,
+    balances: RwLock<HashMap<Pubkey, i64>>,
 
     /// A map of smart contract transaction signatures to what remains of its payment
     /// plan. Each transaction that targets the plan should cause it to be reduced.
@@ -121,7 +121,7 @@ impl Bank {
     }
 
     /// Commit funds to the `payment.to` party.
-    fn apply_payment(&self, payment: &Payment, balances: &mut HashMap<PublicKey, i64>) {
+    fn apply_payment(&self, payment: &Payment, balances: &mut HashMap<Pubkey, i64>) {
         *balances.entry(payment.to).or_insert(0) += payment.tokens;
     }
 
@@ -219,7 +219,7 @@ impl Bank {
 
     /// Deduct tokens from the 'from' address the account has sufficient
     /// funds and isn't a duplicate.
-    fn apply_debits(&self, tx: &Transaction, bals: &mut HashMap<PublicKey, i64>) -> Result<()> {
+    fn apply_debits(&self, tx: &Transaction, bals: &mut HashMap<Pubkey, i64>) -> Result<()> {
         let mut purge = false;
         {
             let option = bals.get_mut(&tx.from);
@@ -260,7 +260,7 @@ impl Bank {
 
     /// Apply only a transaction's credits.
     /// Note: It is safe to apply credits from multiple transactions in parallel.
-    fn apply_credits(&self, tx: &Transaction, balances: &mut HashMap<PublicKey, i64>) {
+    fn apply_credits(&self, tx: &Transaction, balances: &mut HashMap<Pubkey, i64>) {
         match &tx.instruction {
             Instruction::NewContract(contract) => {
                 let plan = contract.plan.clone();
@@ -470,7 +470,7 @@ impl Bank {
 
     /// Process a Witness Signature. Any payment plans waiting on this signature
     /// will progress one step.
-    fn apply_signature(&self, from: PublicKey, tx_sig: Signature) -> Result<()> {
+    fn apply_signature(&self, from: Pubkey, tx_sig: Signature) -> Result<()> {
         if let Occupied(mut e) = self
             .pending
             .write()
@@ -489,7 +489,7 @@ impl Bank {
 
     /// Process a Witness Timestamp. Any payment plans waiting on this timestamp
     /// will progress one step.
-    fn apply_timestamp(&self, from: PublicKey, dt: DateTime<Utc>) -> Result<()> {
+    fn apply_timestamp(&self, from: Pubkey, dt: DateTime<Utc>) -> Result<()> {
         // Check to see if any timelocked transactions can be completed.
         let mut completed = vec![];
 
@@ -520,7 +520,7 @@ impl Bank {
         &self,
         n: i64,
         keypair: &Keypair,
-        to: PublicKey,
+        to: Pubkey,
         last_id: Hash,
     ) -> Result<Signature> {
         let tx = Transaction::new(keypair, to, n, last_id);
@@ -535,7 +535,7 @@ impl Bank {
         &self,
         n: i64,
         keypair: &Keypair,
-        to: PublicKey,
+        to: Pubkey,
         dt: DateTime<Utc>,
         last_id: Hash,
     ) -> Result<Signature> {
@@ -544,7 +544,7 @@ impl Bank {
         self.process_transaction(&tx).map(|_| sig)
     }
 
-    pub fn get_balance(&self, pubkey: &PublicKey) -> i64 {
+    pub fn get_balance(&self, pubkey: &Pubkey) -> i64 {
         let bals = self
             .balances
             .read()
@@ -868,14 +868,14 @@ mod tests {
 
     fn create_sample_ledger_with_next_entries(
         length: usize,
-    ) -> (impl Iterator<Item = Entry>, PublicKey) {
+    ) -> (impl Iterator<Item = Entry>, Pubkey) {
         let mint = Mint::new((length * length) as i64);
         let genesis = mint.create_entries();
         let block = create_sample_block_with_next_entries(&mint, length);
         (genesis.into_iter().chain(block), mint.pubkey())
     }
 
-    fn create_sample_ledger(length: usize) -> (impl Iterator<Item = Entry>, PublicKey) {
+    fn create_sample_ledger(length: usize) -> (impl Iterator<Item = Entry>, Pubkey) {
         let mint = Mint::new(1 + length as i64);
         let genesis = mint.create_entries();
         let block = create_sample_block(&mint, length);
diff --git a/src/bin/wallet.rs b/src/bin/wallet.rs
index a73ffd8f72..536469ea83 100644
--- a/src/bin/wallet.rs
+++ b/src/bin/wallet.rs
@@ -13,7 +13,7 @@ use solana::crdt::NodeInfo;
 use solana::drone::DRONE_PORT;
 use solana::fullnode::Config;
 use solana::logger;
-use solana::signature::{read_keypair, Keypair, KeypairUtil, PublicKey, Signature};
+use solana::signature::{read_keypair, Keypair, KeypairUtil, Pubkey, Signature};
 use solana::thin_client::ThinClient;
 use solana::wallet::request_airdrop;
 use std::error;
@@ -27,7 +27,7 @@ enum WalletCommand {
     Address,
     Balance,
     AirDrop(i64),
-    Pay(i64, PublicKey),
+    Pay(i64, Pubkey),
     Confirm(Signature),
 }
 
@@ -177,11 +177,11 @@ fn parse_args() -> Result<WalletConfig, Box<error::Error>> {
                     .into_vec()
                     .expect("base58-encoded public key");
 
-                if pubkey_vec.len() != std::mem::size_of::<PublicKey>() {
+                if pubkey_vec.len() != std::mem::size_of::<Pubkey>() {
                     eprintln!("{}", pay_matches.usage());
                     Err(WalletError::BadParameter("Invalid public key".to_string()))?;
                 }
-                PublicKey::new(&pubkey_vec)
+                Pubkey::new(&pubkey_vec)
             } else {
                 id.pubkey()
             };
diff --git a/src/budget.rs b/src/budget.rs
index 967a02d623..f11ae1e52a 100644
--- a/src/budget.rs
+++ b/src/budget.rs
@@ -5,22 +5,22 @@
 
 use chrono::prelude::*;
 use payment_plan::{Payment, PaymentPlan, Witness};
-use signature::PublicKey;
+use signature::Pubkey;
 use std::mem;
 
 /// A data type representing a `Witness` that the payment plan is waiting on.
 #[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
 pub enum Condition {
     /// Wait for a `Timestamp` `Witness` at or after the given `DateTime`.
-    Timestamp(DateTime<Utc>, PublicKey),
+    Timestamp(DateTime<Utc>, Pubkey),
 
-    /// Wait for a `Signature` `Witness` from `PublicKey`.
-    Signature(PublicKey),
+    /// Wait for a `Signature` `Witness` from `Pubkey`.
+    Signature(Pubkey),
 }
 
 impl Condition {
     /// Return true if the given Witness satisfies this Condition.
-    pub fn is_satisfied(&self, witness: &Witness, from: &PublicKey) -> bool {
+    pub fn is_satisfied(&self, witness: &Witness, from: &Pubkey) -> bool {
         match (self, witness) {
             (Condition::Signature(pubkey), Witness::Signature) => pubkey == from,
             (Condition::Timestamp(dt, pubkey), Witness::Timestamp(last_time)) => {
@@ -47,22 +47,22 @@ pub enum Budget {
 }
 
 impl Budget {
-    /// Create the simplest budget - one that pays `tokens` to PublicKey.
-    pub fn new_payment(tokens: i64, to: PublicKey) -> Self {
+    /// Create the simplest budget - one that pays `tokens` to Pubkey.
+    pub fn new_payment(tokens: i64, to: Pubkey) -> Self {
         Budget::Pay(Payment { tokens, to })
     }
 
     /// Create a budget that pays `tokens` to `to` after being witnessed by `from`.
-    pub fn new_authorized_payment(from: PublicKey, tokens: i64, to: PublicKey) -> Self {
+    pub fn new_authorized_payment(from: Pubkey, tokens: i64, to: Pubkey) -> Self {
         Budget::After(Condition::Signature(from), Payment { tokens, to })
     }
 
     /// Create a budget that pays `tokens` to `to` after the given DateTime.
     pub fn new_future_payment(
         dt: DateTime<Utc>,
-        from: PublicKey,
+        from: Pubkey,
         tokens: i64,
-        to: PublicKey,
+        to: Pubkey,
     ) -> Self {
         Budget::After(Condition::Timestamp(dt, from), Payment { tokens, to })
     }
@@ -71,9 +71,9 @@ impl Budget {
     /// unless cancelled by `from`.
     pub fn new_cancelable_future_payment(
         dt: DateTime<Utc>,
-        from: PublicKey,
+        from: Pubkey,
         tokens: i64,
-        to: PublicKey,
+        to: Pubkey,
     ) -> Self {
         Budget::Or(
             (Condition::Timestamp(dt, from), Payment { tokens, to }),
@@ -101,7 +101,7 @@ impl PaymentPlan for Budget {
 
     /// Apply a witness to the budget to see if the budget can be reduced.
     /// If so, modify the budget in-place.
-    fn apply_witness(&mut self, witness: &Witness, from: &PublicKey) {
+    fn apply_witness(&mut self, witness: &Witness, from: &Pubkey) {
         let new_payment = match self {
             Budget::After(cond, payment) if cond.is_satisfied(witness, from) => Some(payment),
             Budget::Or((cond, payment), _) if cond.is_satisfied(witness, from) => Some(payment),
@@ -122,7 +122,7 @@ mod tests {
 
     #[test]
     fn test_signature_satisfied() {
-        let from = PublicKey::default();
+        let from = Pubkey::default();
         assert!(Condition::Signature(from).is_satisfied(&Witness::Signature, &from));
     }
 
@@ -130,7 +130,7 @@ mod tests {
     fn test_timestamp_satisfied() {
         let dt1 = Utc.ymd(2014, 11, 14).and_hms(8, 9, 10);
         let dt2 = Utc.ymd(2014, 11, 14).and_hms(10, 9, 8);
-        let from = PublicKey::default();
+        let from = Pubkey::default();
         assert!(Condition::Timestamp(dt1, from).is_satisfied(&Witness::Timestamp(dt1), &from));
         assert!(Condition::Timestamp(dt1, from).is_satisfied(&Witness::Timestamp(dt2), &from));
         assert!(!Condition::Timestamp(dt2, from).is_satisfied(&Witness::Timestamp(dt1), &from));
@@ -139,8 +139,8 @@ mod tests {
     #[test]
     fn test_verify() {
         let dt = Utc.ymd(2014, 11, 14).and_hms(8, 9, 10);
-        let from = PublicKey::default();
-        let to = PublicKey::default();
+        let from = Pubkey::default();
+        let to = Pubkey::default();
         assert!(Budget::new_payment(42, to).verify(42));
         assert!(Budget::new_authorized_payment(from, 42, to).verify(42));
         assert!(Budget::new_future_payment(dt, from, 42, to).verify(42));
@@ -149,8 +149,8 @@ mod tests {
 
     #[test]
     fn test_authorized_payment() {
-        let from = PublicKey::default();
-        let to = PublicKey::default();
+        let from = Pubkey::default();
+        let to = Pubkey::default();
 
         let mut budget = Budget::new_authorized_payment(from, 42, to);
         budget.apply_witness(&Witness::Signature, &from);
@@ -185,8 +185,8 @@ mod tests {
     #[test]
     fn test_cancelable_future_payment() {
         let dt = Utc.ymd(2014, 11, 14).and_hms(8, 9, 10);
-        let from = PublicKey::default();
-        let to = PublicKey::default();
+        let from = Pubkey::default();
+        let to = Pubkey::default();
 
         let mut budget = Budget::new_cancelable_future_payment(dt, from, 42, to);
         budget.apply_witness(&Witness::Timestamp(dt), &from);
diff --git a/src/choose_gossip_peer_strategy.rs b/src/choose_gossip_peer_strategy.rs
index 04bda7c209..a5c687bf58 100644
--- a/src/choose_gossip_peer_strategy.rs
+++ b/src/choose_gossip_peer_strategy.rs
@@ -2,7 +2,7 @@ use crdt::{CrdtError, NodeInfo};
 use rand::distributions::{Distribution, Weighted, WeightedChoice};
 use rand::thread_rng;
 use result::Result;
-use signature::PublicKey;
+use signature::Pubkey;
 use std;
 use std::collections::HashMap;
 
@@ -61,21 +61,21 @@ impl<'a> ChooseGossipPeerStrategy for ChooseRandomPeerStrategy<'a> {
 pub struct ChooseWeightedPeerStrategy<'a> {
     // The map of last directly observed update_index for each active validator.
     // This is how we get observed(v) from the formula above.
-    remote: &'a HashMap<PublicKey, u64>,
+    remote: &'a HashMap<Pubkey, u64>,
     // The map of rumored update_index for each active validator. Using the formula above,
     // to find rumor_v(i), we would first look up "v" in the outer map, then look up
     // "i" in the inner map, i.e. look up external_liveness[v][i]
-    external_liveness: &'a HashMap<PublicKey, HashMap<PublicKey, u64>>,
+    external_liveness: &'a HashMap<Pubkey, HashMap<Pubkey, u64>>,
     // A function returning the size of the stake for a particular validator, corresponds
     // to stake(i) in the formula above.
-    get_stake: &'a Fn(PublicKey) -> f64,
+    get_stake: &'a Fn(Pubkey) -> f64,
 }
 
 impl<'a> ChooseWeightedPeerStrategy<'a> {
     pub fn new(
-        remote: &'a HashMap<PublicKey, u64>,
-        external_liveness: &'a HashMap<PublicKey, HashMap<PublicKey, u64>>,
-        get_stake: &'a Fn(PublicKey) -> f64,
+        remote: &'a HashMap<Pubkey, u64>,
+        external_liveness: &'a HashMap<Pubkey, HashMap<Pubkey, u64>>,
+        get_stake: &'a Fn(Pubkey) -> f64,
     ) -> Self {
         ChooseWeightedPeerStrategy {
             remote,
@@ -84,7 +84,7 @@ impl<'a> ChooseWeightedPeerStrategy<'a> {
         }
     }
 
-    fn calculate_weighted_remote_index(&self, peer_id: PublicKey) -> u32 {
+    fn calculate_weighted_remote_index(&self, peer_id: Pubkey) -> u32 {
         let mut last_seen_index = 0;
         // If the peer is not in our remote table, then we leave last_seen_index as zero.
         // Only happens when a peer appears in our crdt.table but not in our crdt.remote,
@@ -192,11 +192,11 @@ impl<'a> ChooseGossipPeerStrategy for ChooseWeightedPeerStrategy<'a> {
 mod tests {
     use choose_gossip_peer_strategy::{ChooseWeightedPeerStrategy, DEFAULT_WEIGHT};
     use logger;
-    use signature::{Keypair, KeypairUtil, PublicKey};
+    use signature::{Keypair, KeypairUtil, Pubkey};
     use std;
     use std::collections::HashMap;
 
-    fn get_stake(_id: PublicKey) -> f64 {
+    fn get_stake(_id: Pubkey) -> f64 {
         1.0
     }
 
@@ -207,8 +207,8 @@ mod tests {
         // Initialize the filler keys
         let key1 = Keypair::new().pubkey();
 
-        let remote: HashMap<PublicKey, u64> = HashMap::new();
-        let external_liveness: HashMap<PublicKey, HashMap<PublicKey, u64>> = HashMap::new();
+        let remote: HashMap<Pubkey, u64> = HashMap::new();
+        let external_liveness: HashMap<Pubkey, HashMap<Pubkey, u64>> = HashMap::new();
 
         let weighted_strategy =
             ChooseWeightedPeerStrategy::new(&remote, &external_liveness, &get_stake);
@@ -227,13 +227,13 @@ mod tests {
         let key1 = Keypair::new().pubkey();
         let key2 = Keypair::new().pubkey();
 
-        let remote: HashMap<PublicKey, u64> = HashMap::new();
-        let mut external_liveness: HashMap<PublicKey, HashMap<PublicKey, u64>> = HashMap::new();
+        let remote: HashMap<Pubkey, u64> = HashMap::new();
+        let mut external_liveness: HashMap<Pubkey, HashMap<Pubkey, u64>> = HashMap::new();
 
         // If only the liveness table contains the entry, should return the
         // weighted liveness entries
         let test_value: u32 = 5;
-        let mut rumors: HashMap<PublicKey, u64> = HashMap::new();
+        let mut rumors: HashMap<Pubkey, u64> = HashMap::new();
         rumors.insert(key2, test_value as u64);
         external_liveness.insert(key1, rumors);
 
@@ -252,12 +252,12 @@ mod tests {
         let key1 = Keypair::new().pubkey();
         let key2 = Keypair::new().pubkey();
 
-        let remote: HashMap<PublicKey, u64> = HashMap::new();
-        let mut external_liveness: HashMap<PublicKey, HashMap<PublicKey, u64>> = HashMap::new();
+        let remote: HashMap<Pubkey, u64> = HashMap::new();
+        let mut external_liveness: HashMap<Pubkey, HashMap<Pubkey, u64>> = HashMap::new();
 
         // If the vote index is greater than u32::MAX, default to u32::MAX
         let test_value = (std::u32::MAX as u64) + 10;
-        let mut rumors: HashMap<PublicKey, u64> = HashMap::new();
+        let mut rumors: HashMap<Pubkey, u64> = HashMap::new();
         rumors.insert(key2, test_value);
         external_liveness.insert(key1, rumors);
 
@@ -275,12 +275,12 @@ mod tests {
         // Initialize the filler keys
         let key1 = Keypair::new().pubkey();
 
-        let mut remote: HashMap<PublicKey, u64> = HashMap::new();
-        let mut external_liveness: HashMap<PublicKey, HashMap<PublicKey, u64>> = HashMap::new();
+        let mut remote: HashMap<Pubkey, u64> = HashMap::new();
+        let mut external_liveness: HashMap<Pubkey, HashMap<Pubkey, u64>> = HashMap::new();
 
         // Test many validators' rumors in external_liveness
         let num_peers = 10;
-        let mut rumors: HashMap<PublicKey, u64> = HashMap::new();
+        let mut rumors: HashMap<Pubkey, u64> = HashMap::new();
 
         remote.insert(key1, 0);
 
@@ -305,13 +305,13 @@ mod tests {
         // Initialize the filler keys
         let key1 = Keypair::new().pubkey();
 
-        let mut remote: HashMap<PublicKey, u64> = HashMap::new();
-        let mut external_liveness: HashMap<PublicKey, HashMap<PublicKey, u64>> = HashMap::new();
+        let mut remote: HashMap<Pubkey, u64> = HashMap::new();
+        let mut external_liveness: HashMap<Pubkey, HashMap<Pubkey, u64>> = HashMap::new();
 
         // Test many validators' rumors in external_liveness
         let num_peers = 10;
         let old_index = 20;
-        let mut rumors: HashMap<PublicKey, u64> = HashMap::new();
+        let mut rumors: HashMap<Pubkey, u64> = HashMap::new();
 
         remote.insert(key1, old_index);
 
diff --git a/src/crdt.rs b/src/crdt.rs
index 7d78714e79..92ee422354 100644
--- a/src/crdt.rs
+++ b/src/crdt.rs
@@ -2,7 +2,7 @@
 //! a gossip control plane.  The goal is to share small bits of off-chain information and detect and
 //! repair partitions.
 //!
-//! This CRDT only supports a very limited set of types.  A map of PublicKey -> Versioned Struct.
+//! This CRDT only supports a very limited set of types.  A map of Pubkey -> Versioned Struct.
 //! The last version is always picked during an update.
 //!
 //! The network is arranged in layers:
@@ -25,7 +25,7 @@ use pnet_datalink as datalink;
 use rand::{thread_rng, RngCore};
 use rayon::prelude::*;
 use result::{Error, Result};
-use signature::{Keypair, KeypairUtil, PublicKey};
+use signature::{Keypair, KeypairUtil, Pubkey};
 use std;
 use std::collections::HashMap;
 use std::collections::VecDeque;
@@ -126,18 +126,18 @@ pub struct LedgerState {
 
 #[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
 pub struct NodeInfo {
-    pub id: PublicKey,
+    pub id: Pubkey,
     /// If any of the bits change, update increment this value
     pub version: u64,
     /// network addresses
     pub contact_info: ContactInfo,
     /// current leader identity
-    pub leader_id: PublicKey,
+    pub leader_id: Pubkey,
     /// information about the state of the ledger
     pub ledger_state: LedgerState,
 }
 
-fn make_debug_id(key: &PublicKey) -> u64 {
+fn make_debug_id(key: &Pubkey) -> u64 {
     let buf: &[u8] = &key.as_ref();
     let mut rdr = Cursor::new(&buf[..8]);
     rdr.read_u64::<LittleEndian>()
@@ -146,7 +146,7 @@ fn make_debug_id(key: &PublicKey) -> u64 {
 
 impl NodeInfo {
     pub fn new(
-        id: PublicKey,
+        id: Pubkey,
         ncp: SocketAddr,
         tvu: SocketAddr,
         rpu: SocketAddr,
@@ -164,7 +164,7 @@ impl NodeInfo {
                 tvu_window,
                 version: 0,
             },
-            leader_id: PublicKey::default(),
+            leader_id: Pubkey::default(),
             ledger_state: LedgerState {
                 last_id: Hash::default(),
             },
@@ -207,7 +207,7 @@ impl NodeInfo {
         nxt_addr.set_port(addr.port() + nxt);
         nxt_addr
     }
-    pub fn new_leader_with_pubkey(pubkey: PublicKey, bind_addr: &SocketAddr) -> Self {
+    pub fn new_leader_with_pubkey(pubkey: Pubkey, bind_addr: &SocketAddr) -> Self {
         let transactions_addr = *bind_addr;
         let gossip_addr = Self::next_port(&bind_addr, 1);
         let replicate_addr = Self::next_port(&bind_addr, 2);
@@ -229,7 +229,7 @@ impl NodeInfo {
     pub fn new_entry_point(gossip_addr: SocketAddr) -> Self {
         let daddr: SocketAddr = "0.0.0.0:0".parse().unwrap();
         NodeInfo::new(
-            PublicKey::default(),
+            Pubkey::default(),
             gossip_addr,
             daddr,
             daddr,
@@ -252,22 +252,22 @@ impl NodeInfo {
 /// No attempt to keep track of timeouts or dropped requests is made, or should be.
 pub struct Crdt {
     /// table of everyone in the network
-    pub table: HashMap<PublicKey, NodeInfo>,
+    pub table: HashMap<Pubkey, NodeInfo>,
     /// Value of my update index when entry in table was updated.
     /// Nodes will ask for updates since `update_index`, and this node
     /// should respond with all the identities that are greater then the
     /// request's `update_index` in this list
-    local: HashMap<PublicKey, u64>,
+    local: HashMap<Pubkey, u64>,
     /// The value of the remote update index that I have last seen
     /// This Node will ask external nodes for updates since the value in this list
-    pub remote: HashMap<PublicKey, u64>,
+    pub remote: HashMap<Pubkey, u64>,
     /// last time the public key had sent us a message
-    pub alive: HashMap<PublicKey, u64>,
+    pub alive: HashMap<Pubkey, u64>,
     pub update_index: u64,
-    pub me: PublicKey,
+    pub me: Pubkey,
     /// last time we heard from anyone getting a message fro this public key
     /// these are rumers and shouldn't be trusted directly
-    external_liveness: HashMap<PublicKey, HashMap<PublicKey, u64>>,
+    external_liveness: HashMap<Pubkey, HashMap<Pubkey, u64>>,
 }
 // TODO These messages should be signed, and go through the gpu pipeline for spam filtering
 #[derive(Serialize, Deserialize, Debug)]
@@ -279,7 +279,7 @@ enum Protocol {
     RequestUpdates(u64, NodeInfo),
     //TODO might need a since?
     /// from id, form's last update index, NodeInfo
-    ReceiveUpdates(PublicKey, u64, Vec<NodeInfo>, Vec<(PublicKey, u64)>),
+    ReceiveUpdates(Pubkey, u64, Vec<NodeInfo>, Vec<(Pubkey, u64)>),
     /// ask for a missing index
     /// (my replicated data to keep alive, missing window index)
     RequestWindowIndex(NodeInfo, u64),
@@ -334,14 +334,14 @@ impl Crdt {
         let leader_id = self.table[&self.me].leader_id;
 
         // leader_id can be 0s from network entry point
-        if leader_id == PublicKey::default() {
+        if leader_id == Pubkey::default() {
             return None;
         }
 
         self.table.get(&leader_id)
     }
 
-    pub fn set_leader(&mut self, key: PublicKey) -> () {
+    pub fn set_leader(&mut self, key: Pubkey) -> () {
         let mut me = self.my_data().clone();
         warn!(
             "{:x}: LEADER_UPDATE TO {:x} from {:x}",
@@ -354,11 +354,11 @@ impl Crdt {
         self.insert(&me);
     }
 
-    pub fn get_external_liveness_entry(&self, key: &PublicKey) -> Option<&HashMap<PublicKey, u64>> {
+    pub fn get_external_liveness_entry(&self, key: &Pubkey) -> Option<&HashMap<Pubkey, u64>> {
         self.external_liveness.get(key)
     }
 
-    pub fn insert_vote(&mut self, pubkey: &PublicKey, v: &Vote, last_id: Hash) {
+    pub fn insert_vote(&mut self, pubkey: &Pubkey, v: &Vote, last_id: Hash) {
         if self.table.get(pubkey).is_none() {
             warn!(
                 "{:x}: VOTE for unknown id: {:x}",
@@ -408,7 +408,7 @@ impl Crdt {
             self.insert(&data);
         }
     }
-    pub fn insert_votes(&mut self, votes: &[(PublicKey, Vote, Hash)]) {
+    pub fn insert_votes(&mut self, votes: &[(Pubkey, Vote, Hash)]) {
         inc_new_counter_info!("crdt-vote-count", votes.len());
         if !votes.is_empty() {
             info!("{:x}: INSERTING VOTES {}", self.debug_id(), votes.len());
@@ -451,7 +451,7 @@ impl Crdt {
         }
     }
 
-    fn update_liveness(&mut self, id: PublicKey) {
+    fn update_liveness(&mut self, id: Pubkey) {
         //update the liveness table
         let now = timestamp();
         trace!(
@@ -477,7 +477,7 @@ impl Crdt {
         }
         let leader_id = self.leader_data().unwrap().id;
         let limit = GOSSIP_PURGE_MILLIS;
-        let dead_ids: Vec<PublicKey> = self
+        let dead_ids: Vec<Pubkey> = self
             .alive
             .iter()
             .filter_map(|(&k, v)| {
@@ -515,7 +515,7 @@ impl Crdt {
                     make_debug_id(id),
                 );
                 inc_new_counter_info!("crdt-purge-purged_leader", 1, 1);
-                self.set_leader(PublicKey::default());
+                self.set_leader(Pubkey::default());
             }
         }
     }
@@ -739,16 +739,16 @@ impl Crdt {
     }
 
     // TODO: fill in with real implmentation once staking is implemented
-    fn get_stake(_id: PublicKey) -> f64 {
+    fn get_stake(_id: Pubkey) -> f64 {
         1.0
     }
 
-    fn get_updates_since(&self, v: u64) -> (PublicKey, u64, Vec<NodeInfo>) {
+    fn get_updates_since(&self, v: u64) -> (Pubkey, u64, Vec<NodeInfo>) {
         //trace!("get updates since {}", v);
         let data = self
             .table
             .values()
-            .filter(|x| x.id != PublicKey::default() && self.local[&x.id] > v)
+            .filter(|x| x.id != Pubkey::default() && self.local[&x.id] > v)
             .cloned()
             .collect();
         let id = self.me;
@@ -855,16 +855,16 @@ impl Crdt {
         Ok(())
     }
     /// TODO: This is obviously the wrong way to do this. Need to implement leader selection
-    fn top_leader(&self) -> Option<PublicKey> {
+    fn top_leader(&self) -> Option<Pubkey> {
         let mut table = HashMap::new();
-        let def = PublicKey::default();
+        let def = Pubkey::default();
         let cur = self.table.values().filter(|x| x.leader_id != def);
         for v in cur {
             let cnt = table.entry(&v.leader_id).or_insert(0);
             *cnt += 1;
             trace!("leader {:x} {}", make_debug_id(&v.leader_id), *cnt);
         }
-        let mut sorted: Vec<(&PublicKey, usize)> = table.into_iter().collect();
+        let mut sorted: Vec<(&Pubkey, usize)> = table.into_iter().collect();
         let my_id = self.debug_id();
         for x in &sorted {
             trace!(
@@ -895,10 +895,10 @@ impl Crdt {
     /// * `data` - the update data
     fn apply_updates(
         &mut self,
-        from: PublicKey,
+        from: Pubkey,
         update_index: u64,
         data: &[NodeInfo],
-        external_liveness: &[(PublicKey, u64)],
+        external_liveness: &[(Pubkey, u64)],
     ) {
         trace!("got updates {}", data.len());
         // TODO we need to punish/spam resist here
@@ -1272,7 +1272,7 @@ impl TestNode {
         let pubkey = Keypair::new().pubkey();
         Self::new_localhost_with_pubkey(pubkey)
     }
-    pub fn new_localhost_with_pubkey(pubkey: PublicKey) -> Self {
+    pub fn new_localhost_with_pubkey(pubkey: Pubkey) -> Self {
         let transaction = UdpSocket::bind("127.0.0.1:0").unwrap();
         let gossip = UdpSocket::bind("127.0.0.1:0").unwrap();
         let replicate = UdpSocket::bind("127.0.0.1:0").unwrap();
@@ -1381,7 +1381,7 @@ mod tests {
     use logger;
     use packet::BlobRecycler;
     use result::Error;
-    use signature::{Keypair, KeypairUtil, PublicKey};
+    use signature::{Keypair, KeypairUtil, Pubkey};
     use std::fs::remove_dir_all;
     use std::sync::atomic::{AtomicBool, Ordering};
     use std::sync::mpsc::channel;
@@ -1884,7 +1884,7 @@ mod tests {
         let len = crdt.table.len() as u64;
         crdt.purge(now + GOSSIP_PURGE_MILLIS + 1);
         assert_eq!(len as usize - 1, crdt.table.len());
-        assert_eq!(crdt.my_data().leader_id, PublicKey::default());
+        assert_eq!(crdt.my_data().leader_id, Pubkey::default());
         assert!(crdt.leader_data().is_none());
     }
 
diff --git a/src/drone.rs b/src/drone.rs
index f8c85b1d7a..0e40e81d09 100644
--- a/src/drone.rs
+++ b/src/drone.rs
@@ -7,7 +7,7 @@
 use influx_db_client as influxdb;
 use metrics;
 use signature::Signature;
-use signature::{Keypair, PublicKey};
+use signature::{Keypair, Pubkey};
 use std::io;
 use std::io::{Error, ErrorKind};
 use std::net::{IpAddr, SocketAddr, UdpSocket};
@@ -23,7 +23,7 @@ pub const DRONE_PORT: u16 = 9900;
 pub enum DroneRequest {
     GetAirdrop {
         airdrop_request_amount: u64,
-        client_pubkey: PublicKey,
+        client_pubkey: Pubkey,
     },
 }
 
diff --git a/src/entry.rs b/src/entry.rs
index 0091deea69..1b7ad24ad0 100644
--- a/src/entry.rs
+++ b/src/entry.rs
@@ -6,7 +6,7 @@ use bincode::{serialize_into, serialized_size};
 use hash::{extend_and_hash, hash, Hash};
 use packet::{BlobRecycler, SharedBlob, BLOB_DATA_SIZE};
 use rayon::prelude::*;
-use signature::PublicKey;
+use signature::Pubkey;
 use std::io::Cursor;
 use std::net::SocketAddr;
 use transaction::Transaction;
@@ -83,7 +83,7 @@ impl Entry {
         &self,
         blob_recycler: &BlobRecycler,
         idx: Option<u64>,
-        id: Option<PublicKey>,
+        id: Option<Pubkey>,
         addr: Option<&SocketAddr>,
     ) -> SharedBlob {
         let blob = blob_recycler.allocate();
diff --git a/src/mint.rs b/src/mint.rs
index 17eec8465b..4f3388a064 100644
--- a/src/mint.rs
+++ b/src/mint.rs
@@ -3,14 +3,14 @@
 use entry::Entry;
 use hash::{hash, Hash};
 use ring::rand::SystemRandom;
-use signature::{Keypair, KeypairUtil, PublicKey};
+use signature::{Keypair, KeypairUtil, Pubkey};
 use transaction::Transaction;
 use untrusted::Input;
 
 #[derive(Serialize, Deserialize, Debug)]
 pub struct Mint {
     pub pkcs8: Vec<u8>,
-    pubkey: PublicKey,
+    pubkey: Pubkey,
     pub tokens: i64,
 }
 
@@ -46,7 +46,7 @@ impl Mint {
         Keypair::from_pkcs8(Input::from(&self.pkcs8)).expect("from_pkcs8 in mint pub fn keypair")
     }
 
-    pub fn pubkey(&self) -> PublicKey {
+    pub fn pubkey(&self) -> Pubkey {
         self.pubkey
     }
 
diff --git a/src/packet.rs b/src/packet.rs
index 52cab8866f..dacd0f965d 100644
--- a/src/packet.rs
+++ b/src/packet.rs
@@ -5,7 +5,7 @@ use counter::Counter;
 use log::Level;
 use result::{Error, Result};
 use serde::Serialize;
-use signature::PublicKey;
+use signature::Pubkey;
 use std::collections::VecDeque;
 use std::fmt;
 use std::io;
@@ -302,7 +302,7 @@ pub fn to_blobs<T: Serialize>(
 }
 
 const BLOB_INDEX_END: usize = size_of::<u64>();
-const BLOB_ID_END: usize = BLOB_INDEX_END + size_of::<usize>() + size_of::<PublicKey>();
+const BLOB_ID_END: usize = BLOB_INDEX_END + size_of::<usize>() + size_of::<Pubkey>();
 const BLOB_FLAGS_END: usize = BLOB_ID_END + size_of::<u32>();
 const BLOB_SIZE_END: usize = BLOB_FLAGS_END + size_of::<u64>();
 
@@ -329,12 +329,12 @@ impl Blob {
     }
     /// sender id, we use this for identifying if its a blob from the leader that we should
     /// retransmit.  eventually blobs should have a signature that we can use ffor spam filtering
-    pub fn get_id(&self) -> Result<PublicKey> {
+    pub fn get_id(&self) -> Result<Pubkey> {
         let e = deserialize(&self.data[BLOB_INDEX_END..BLOB_ID_END])?;
         Ok(e)
     }
 
-    pub fn set_id(&mut self, id: PublicKey) -> Result<()> {
+    pub fn set_id(&mut self, id: Pubkey) -> Result<()> {
         let wtr = serialize(&id)?;
         self.data[BLOB_INDEX_END..BLOB_ID_END].clone_from_slice(&wtr);
         Ok(())
diff --git a/src/payment_plan.rs b/src/payment_plan.rs
index 29b82a0056..7c90fa029f 100644
--- a/src/payment_plan.rs
+++ b/src/payment_plan.rs
@@ -4,7 +4,7 @@
 //! `Payment`, the payment is executed.
 
 use chrono::prelude::*;
-use signature::PublicKey;
+use signature::Pubkey;
 
 /// The types of events a payment plan can process.
 #[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
@@ -12,18 +12,18 @@ pub enum Witness {
     /// The current time.
     Timestamp(DateTime<Utc>),
 
-    /// A siganture from PublicKey.
+    /// A siganture from Pubkey.
     Signature,
 }
 
-/// Some amount of tokens that should be sent to the `to` `PublicKey`.
+/// Some amount of tokens that should be sent to the `to` `Pubkey`.
 #[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
 pub struct Payment {
     /// Amount to be paid.
     pub tokens: i64,
 
-    /// The `PublicKey` that `tokens` should be paid to.
-    pub to: PublicKey,
+    /// The `Pubkey` that `tokens` should be paid to.
+    pub to: Pubkey,
 }
 
 /// Interface to smart contracts.
@@ -36,5 +36,5 @@ pub trait PaymentPlan {
 
     /// Apply a witness to the payment plan to see if the plan can be reduced.
     /// If so, modify the plan in-place.
-    fn apply_witness(&mut self, witness: &Witness, from: &PublicKey);
+    fn apply_witness(&mut self, witness: &Witness, from: &Pubkey);
 }
diff --git a/src/request.rs b/src/request.rs
index 96c84b80ad..50ccddf168 100644
--- a/src/request.rs
+++ b/src/request.rs
@@ -1,12 +1,12 @@
 //! The `request` module defines the messages for the thin client.
 
 use hash::Hash;
-use signature::{PublicKey, Signature};
+use signature::{Pubkey, Signature};
 
 #[cfg_attr(feature = "cargo-clippy", allow(large_enum_variant))]
 #[derive(Serialize, Deserialize, Debug, Clone, Copy)]
 pub enum Request {
-    GetBalance { key: PublicKey },
+    GetBalance { key: Pubkey },
     GetLastId,
     GetTransactionCount,
     GetSignature { signature: Signature },
@@ -21,7 +21,7 @@ impl Request {
 
 #[derive(Serialize, Deserialize, Debug)]
 pub enum Response {
-    Balance { key: PublicKey, val: i64 },
+    Balance { key: Pubkey, val: i64 },
     LastId { id: Hash },
     TransactionCount { transaction_count: u64 },
     SignatureStatus { signature_status: bool },
diff --git a/src/signature.rs b/src/signature.rs
index fe060044eb..4e1cc9dcc2 100644
--- a/src/signature.rs
+++ b/src/signature.rs
@@ -15,27 +15,27 @@ use untrusted::Input;
 
 pub type Keypair = Ed25519KeyPair;
 #[derive(Serialize, Deserialize, Clone, Copy, Default, Eq, PartialEq, Ord, PartialOrd, Hash)]
-pub struct PublicKey(GenericArray<u8, U32>);
+pub struct Pubkey(GenericArray<u8, U32>);
 
-impl PublicKey {
+impl Pubkey {
     pub fn new(pubkey_vec: &[u8]) -> Self {
-        PublicKey(GenericArray::clone_from_slice(&pubkey_vec))
+        Pubkey(GenericArray::clone_from_slice(&pubkey_vec))
     }
 }
 
-impl AsRef<[u8]> for PublicKey {
+impl AsRef<[u8]> for Pubkey {
     fn as_ref(&self) -> &[u8] {
         &self.0[..]
     }
 }
 
-impl fmt::Debug for PublicKey {
+impl fmt::Debug for Pubkey {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "{}", bs58::encode(self.0).into_string())
     }
 }
 
-impl fmt::Display for PublicKey {
+impl fmt::Display for Pubkey {
     fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
         write!(f, "{}", bs58::encode(self.0).into_string())
     }
@@ -76,7 +76,7 @@ impl fmt::Display for Signature {
 
 pub trait KeypairUtil {
     fn new() -> Self;
-    fn pubkey(&self) -> PublicKey;
+    fn pubkey(&self) -> Pubkey;
 }
 
 impl KeypairUtil for Ed25519KeyPair {
@@ -88,8 +88,8 @@ impl KeypairUtil for Ed25519KeyPair {
     }
 
     /// Return the public key for the given keypair
-    fn pubkey(&self) -> PublicKey {
-        PublicKey(GenericArray::clone_from_slice(self.public_key_bytes()))
+    fn pubkey(&self) -> Pubkey {
+        Pubkey(GenericArray::clone_from_slice(self.public_key_bytes()))
     }
 }
 
@@ -149,7 +149,7 @@ mod tests {
         }
     }
 
-    fn gen_n_pubkeys(seed: [u8; 32], n: i64) -> HashSet<PublicKey> {
+    fn gen_n_pubkeys(seed: [u8; 32], n: i64) -> HashSet<Pubkey> {
         GenKeys::new(seed)
             .gen_n_keypairs(n)
             .into_iter()
diff --git a/src/sigverify.rs b/src/sigverify.rs
index e411d8c61c..1ba7900b20 100644
--- a/src/sigverify.rs
+++ b/src/sigverify.rs
@@ -44,14 +44,14 @@ pub fn init() {
 
 fn verify_packet(packet: &Packet) -> u8 {
     use ring::signature;
-    use signature::{PublicKey, Signature};
+    use signature::{Pubkey, Signature};
     use untrusted;
 
     let msg_start = TX_OFFSET + SIGNED_DATA_OFFSET;
     let sig_start = TX_OFFSET + SIG_OFFSET;
     let sig_end = sig_start + size_of::<Signature>();
     let pubkey_start = TX_OFFSET + PUB_KEY_OFFSET;
-    let pubkey_end = pubkey_start + size_of::<PublicKey>();
+    let pubkey_end = pubkey_start + size_of::<Pubkey>();
 
     if packet.meta.size <= msg_start {
         return 0;
diff --git a/src/thin_client.rs b/src/thin_client.rs
index ec96dbbbb1..b201538620 100644
--- a/src/thin_client.rs
+++ b/src/thin_client.rs
@@ -6,7 +6,7 @@
 use bincode::{deserialize, serialize};
 use hash::Hash;
 use request::{Request, Response};
-use signature::{Keypair, PublicKey, Signature};
+use signature::{Keypair, Pubkey, Signature};
 use std::collections::HashMap;
 use std::io;
 use std::net::{SocketAddr, UdpSocket};
@@ -27,7 +27,7 @@ pub struct ThinClient {
     transactions_socket: UdpSocket,
     last_id: Option<Hash>,
     transaction_count: u64,
-    balances: HashMap<PublicKey, i64>,
+    balances: HashMap<Pubkey, i64>,
     signature_status: bool,
 }
 
@@ -100,7 +100,7 @@ impl ThinClient {
         &self,
         n: i64,
         keypair: &Keypair,
-        to: PublicKey,
+        to: Pubkey,
         last_id: &Hash,
     ) -> io::Result<Signature> {
         let now = Instant::now();
@@ -121,7 +121,7 @@ impl ThinClient {
     /// Request the balance of the user holding `pubkey`. This method blocks
     /// until the server sends a response. If the response packet is dropped
     /// by the network, this method will hang indefinitely.
-    pub fn get_balance(&mut self, pubkey: &PublicKey) -> io::Result<i64> {
+    pub fn get_balance(&mut self, pubkey: &Pubkey) -> io::Result<i64> {
         trace!("get_balance");
         let req = Request::GetBalance { key: *pubkey };
         let data = serialize(&req).expect("serialize GetBalance in pub fn get_balance");
@@ -195,7 +195,7 @@ impl ThinClient {
         self.last_id.expect("some last_id")
     }
 
-    pub fn poll_get_balance(&mut self, pubkey: &PublicKey) -> io::Result<i64> {
+    pub fn poll_get_balance(&mut self, pubkey: &Pubkey) -> io::Result<i64> {
         let mut balance_result;
         let mut balance_value = -1;
         let now = Instant::now();
diff --git a/src/transaction.rs b/src/transaction.rs
index c527571970..9f0914c8ef 100644
--- a/src/transaction.rs
+++ b/src/transaction.rs
@@ -5,7 +5,7 @@ use budget::{Budget, Condition};
 use chrono::prelude::*;
 use hash::Hash;
 use payment_plan::{Payment, PaymentPlan, Witness};
-use signature::{Keypair, KeypairUtil, PublicKey, Signature};
+use signature::{Keypair, KeypairUtil, Pubkey, Signature};
 
 pub const SIGNED_DATA_OFFSET: usize = 112;
 pub const SIG_OFFSET: usize = 8;
@@ -32,7 +32,7 @@ impl PaymentPlan for Plan {
         }
     }
 
-    fn apply_witness(&mut self, witness: &Witness, from: &PublicKey) {
+    fn apply_witness(&mut self, witness: &Witness, from: &Pubkey) {
         match self {
             Plan::Budget(budget) => budget.apply_witness(witness, from),
         }
@@ -68,21 +68,21 @@ pub enum Instruction {
     ApplyTimestamp(DateTime<Utc>),
 
     /// Tell the payment plan that the `NewContract` with `Signature` has been
-    /// signed by the containing transaction's `PublicKey`.
+    /// signed by the containing transaction's `Pubkey`.
     ApplySignature(Signature),
 
     /// Vote for a PoH that is equal to the lastid of this transaction
     NewVote(Vote),
 }
 
-/// An instruction signed by a client with `PublicKey`.
+/// An instruction signed by a client with `Pubkey`.
 #[derive(Serialize, Deserialize, Debug, PartialEq, Eq, Clone)]
 pub struct Transaction {
-    /// A digital signature of `instruction`, `last_id` and `fee`, signed by `PublicKey`.
+    /// A digital signature of `instruction`, `last_id` and `fee`, signed by `Pubkey`.
     pub sig: Signature,
 
-    /// The `PublicKey` of the entity that signed the transaction data.
-    pub from: PublicKey,
+    /// The `Pubkey` of the entity that signed the transaction data.
+    pub from: Pubkey,
 
     /// The action the server should take.
     pub instruction: Instruction,
@@ -117,7 +117,7 @@ impl Transaction {
     /// Create and sign a new Transaction. Used for unit-testing.
     pub fn new_taxed(
         from_keypair: &Keypair,
-        to: PublicKey,
+        to: Pubkey,
         tokens: i64,
         fee: i64,
         last_id: Hash,
@@ -133,7 +133,7 @@ impl Transaction {
     }
 
     /// Create and sign a new Transaction. Used for unit-testing.
-    pub fn new(from_keypair: &Keypair, to: PublicKey, tokens: i64, last_id: Hash) -> Self {
+    pub fn new(from_keypair: &Keypair, to: Pubkey, tokens: i64, last_id: Hash) -> Self {
         Self::new_taxed(from_keypair, to, tokens, 0, last_id)
     }
 
@@ -156,7 +156,7 @@ impl Transaction {
     /// Create and sign a postdated Transaction. Used for unit-testing.
     pub fn new_on_date(
         from_keypair: &Keypair,
-        to: PublicKey,
+        to: Pubkey,
         dt: DateTime<Utc>,
         tokens: i64,
         last_id: Hash,
diff --git a/src/voting.rs b/src/voting.rs
index a16b46def7..559ec08ec1 100644
--- a/src/voting.rs
+++ b/src/voting.rs
@@ -1,16 +1,16 @@
 use entry::Entry;
 use hash::Hash;
-use signature::PublicKey;
+use signature::Pubkey;
 use transaction::{Instruction, Transaction, Vote};
 
-pub fn entries_to_votes(entries: &[Entry]) -> Vec<(PublicKey, Vote, Hash)> {
+pub fn entries_to_votes(entries: &[Entry]) -> Vec<(Pubkey, Vote, Hash)> {
     entries
         .iter()
         .flat_map(|entry| entry.transactions.iter().filter_map(transaction_to_vote))
         .collect()
 }
 
-pub fn transaction_to_vote(tx: &Transaction) -> Option<(PublicKey, Vote, Hash)> {
+pub fn transaction_to_vote(tx: &Transaction) -> Option<(Pubkey, Vote, Hash)> {
     match tx.instruction {
         Instruction::NewVote(ref vote) => Some((tx.from, vote.clone(), tx.last_id)),
         _ => None,
diff --git a/src/wallet.rs b/src/wallet.rs
index 527c41d02b..399d30382a 100644
--- a/src/wallet.rs
+++ b/src/wallet.rs
@@ -1,13 +1,13 @@
 use bincode::serialize;
 use drone::DroneRequest;
-use signature::PublicKey;
+use signature::Pubkey;
 use std::error;
 use std::io::Write;
 use std::net::{SocketAddr, TcpStream};
 
 pub fn request_airdrop(
     drone_addr: &SocketAddr,
-    id: &PublicKey,
+    id: &Pubkey,
     tokens: u64,
 ) -> Result<(), Box<error::Error>> {
     let mut stream = TcpStream::connect(drone_addr)?;
diff --git a/tests/multinode.rs b/tests/multinode.rs
index 23f32e7a2b..b61f083e14 100755
--- a/tests/multinode.rs
+++ b/tests/multinode.rs
@@ -15,7 +15,7 @@ use solana::mint::Mint;
 use solana::ncp::Ncp;
 use solana::result;
 use solana::service::Service;
-use solana::signature::{Keypair, KeypairUtil, PublicKey};
+use solana::signature::{Keypair, KeypairUtil, Pubkey};
 use solana::streamer::{default_window, WINDOW_SIZE};
 use solana::thin_client::ThinClient;
 use solana::timing::duration_as_s;
@@ -751,7 +751,7 @@ fn mk_client(leader: &NodeInfo) -> ThinClient {
 
 fn retry_get_balance(
     client: &mut ThinClient,
-    bob_pubkey: &PublicKey,
+    bob_pubkey: &Pubkey,
     expected: Option<i64>,
 ) -> Option<i64> {
     const LAST: usize = 30;
@@ -773,7 +773,7 @@ fn retry_get_balance(
 fn send_tx_and_retry_get_balance(
     leader: &NodeInfo,
     alice: &Mint,
-    bob_pubkey: &PublicKey,
+    bob_pubkey: &Pubkey,
     expected: Option<i64>,
 ) -> Option<i64> {
     let mut client = mk_client(leader);
@@ -789,7 +789,7 @@ fn send_tx_and_retry_get_balance(
 fn retry_send_tx_and_retry_get_balance(
     leader: &NodeInfo,
     alice: &Mint,
-    bob_pubkey: &PublicKey,
+    bob_pubkey: &Pubkey,
     expected: Option<i64>,
 ) -> Option<i64> {
     let mut client = mk_client(leader);