diff --git a/core/src/client/chain_notify.rs b/core/src/client/chain_notify.rs
index 3870150e88..3d3bafb05e 100644
--- a/core/src/client/chain_notify.rs
+++ b/core/src/client/chain_notify.rs
@@ -14,8 +14,7 @@
 // You should have received a copy of the GNU Affero General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-use cnetwork::NodeId;
-use ctypes::{BlockHash, TxHash};
+use ctypes::BlockHash;
 
 /// Represents what has to be handled by actor listening to chain events
 pub trait ChainNotify: Send + Sync {
@@ -28,9 +27,4 @@ pub trait ChainNotify: Send + Sync {
     fn new_blocks(&self, _imported: Vec<BlockHash>, _invalid: Vec<BlockHash>, _enacted: Vec<BlockHash>) {
         // does nothing by default
     }
-
-    /// fires when new transactions are received from a peer
-    fn transactions_received(&self, _hashes: Vec<TxHash>, _peer_id: NodeId) {
-        // does nothing by default
-    }
 }
diff --git a/core/src/client/client.rs b/core/src/client/client.rs
index dc3726922b..2312057e68 100644
--- a/core/src/client/client.rs
+++ b/core/src/client/client.rs
@@ -37,7 +37,6 @@ use crate::MemPoolMinFees;
 use cdb::{new_journaldb, Algorithm, AsHashDB};
 use cio::IoChannel;
 use ckey::{Address, NetworkId, PlatformAddress};
-use cnetwork::NodeId;
 use cstate::{ActionHandler, FindActionHandler, StateDB, StateResult, TopLevelState, TopStateView};
 use ctimer::{TimeoutHandler, TimerApi, TimerScheduleError, TimerToken};
 use ctypes::header::Header;
@@ -138,12 +137,6 @@ impl Client {
         self.notify.write().push(target);
     }
 
-    pub fn transactions_received(&self, hashes: &[TxHash], peer_id: NodeId) {
-        self.notify(|notify| {
-            notify.transactions_received(hashes.to_vec(), peer_id);
-        });
-    }
-
     pub fn new_blocks(&self, imported: &[BlockHash], invalid: &[BlockHash], enacted: &[BlockHash]) {
         self.notify(|notify| notify.new_blocks(imported.to_vec(), invalid.to_vec(), enacted.to_vec()));
     }
@@ -202,13 +195,11 @@ impl Client {
     }
 
     /// Import transactions from the IO queue
-    pub fn import_queued_transactions(&self, transactions: &[Bytes], peer_id: NodeId) -> usize {
+    pub fn import_queued_transactions(&self, transactions: &[Bytes]) -> usize {
         ctrace!(EXTERNAL_TX, "Importing queued");
         self.queue_transactions.fetch_sub(transactions.len(), AtomicOrdering::SeqCst);
         let transactions: Vec<UnverifiedTransaction> =
             transactions.iter().filter_map(|bytes| Rlp::new(bytes).as_val().ok()).collect();
-        let hashes: Vec<_> = transactions.iter().map(UnverifiedTransaction::hash).collect();
-        self.transactions_received(&hashes, peer_id);
         let results = self.importer.miner.import_external_transactions(self, transactions);
         results.len()
     }
@@ -535,14 +526,14 @@ impl BlockChainClient for Client {
         Ok(())
     }
 
-    fn queue_transactions(&self, transactions: Vec<Bytes>, peer_id: NodeId) {
+    fn queue_transactions(&self, transactions: Vec<Bytes>) {
         let queue_size = self.queue_transactions.load(AtomicOrdering::Relaxed);
         ctrace!(EXTERNAL_TX, "Queue size: {}", queue_size);
         if queue_size > MAX_MEM_POOL_SIZE {
             cwarn!(EXTERNAL_TX, "Ignoring {} transactions: queue is full", transactions.len());
         } else {
             let len = transactions.len();
-            match self.io_channel.lock().send(ClientIoMessage::NewTransactions(transactions, peer_id)) {
+            match self.io_channel.lock().send(ClientIoMessage::NewTransactions(transactions)) {
                 Ok(_) => {
                     self.queue_transactions.fetch_add(len, AtomicOrdering::SeqCst);
                 }
diff --git a/core/src/client/mod.rs b/core/src/client/mod.rs
index 27d70232a6..6c801de022 100644
--- a/core/src/client/mod.rs
+++ b/core/src/client/mod.rs
@@ -38,7 +38,6 @@ use crate::transaction::{LocalizedTransaction, PendingVerifiedTransactions, Veri
 use crate::types::{BlockId, BlockStatus, TransactionId, VerificationQueueInfo as BlockQueueInfo};
 use cdb::DatabaseError;
 use ckey::{Address, NetworkId, PlatformAddress};
-use cnetwork::NodeId;
 use cstate::{FindActionHandler, StateResult, TopLevelState, TopStateView};
 use ctypes::header::Header;
 use ctypes::transaction::ShardTransaction;
@@ -198,7 +197,7 @@ pub trait BlockChainClient: Sync + Send + AccountData + BlockChainTrait + Import
     fn queue_own_transaction(&self, transaction: VerifiedTransaction) -> Result<(), GenericError>;
 
     /// Queue transactions for importing.
-    fn queue_transactions(&self, transactions: Vec<Bytes>, peer_id: NodeId);
+    fn queue_transactions(&self, transactions: Vec<Bytes>);
 
     /// Delete all pending transactions.
     fn delete_all_pending_transactions(&self);
diff --git a/core/src/client/test_client.rs b/core/src/client/test_client.rs
index 28aac0e9a8..ff0c05f71e 100644
--- a/core/src/client/test_client.rs
+++ b/core/src/client/test_client.rs
@@ -50,7 +50,6 @@ use ckey::{
     public_to_address, Address, Ed25519KeyPair as KeyPair, Ed25519Private as Private, Ed25519Public as Public,
     Generator, KeyPairTrait, NetworkId, PlatformAddress, Random,
 };
-use cnetwork::NodeId;
 use cstate::tests::helpers::empty_top_state_with_metadata;
 use cstate::{FindActionHandler, StateDB, TopLevelState};
 use ctimer::{TimeoutHandler, TimerToken};
@@ -508,7 +507,7 @@ impl BlockChainClient for TestBlockChainClient {
         Ok(())
     }
 
-    fn queue_transactions(&self, transactions: Vec<Bytes>, _peer_id: NodeId) {
+    fn queue_transactions(&self, transactions: Vec<Bytes>) {
         // import right here
         let transactions = transactions.into_iter().filter_map(|bytes| Rlp::new(&bytes).as_val().ok()).collect();
         self.miner.import_external_transactions(self, transactions);
diff --git a/core/src/service.rs b/core/src/service.rs
index a1dcdff925..a140e0695c 100644
--- a/core/src/service.rs
+++ b/core/src/service.rs
@@ -20,7 +20,6 @@ use crate::miner::Miner;
 use crate::scheme::Scheme;
 use crate::BlockId;
 use cio::{IoContext, IoHandler, IoHandlerResult, IoService};
-use cnetwork::NodeId;
 use ctimer::TimerApi;
 use ctypes::BlockHash;
 use kvdb::KeyValueDB;
@@ -71,7 +70,7 @@ pub enum ClientIoMessage {
     /// A header is ready
     HeaderVerified,
     /// New transaction RLPs are ready to be imported
-    NewTransactions(Vec<Bytes>, NodeId),
+    NewTransactions(Vec<Bytes>),
     /// Block generation is required
     NewBlockRequired {
         parent_block: BlockId,
@@ -95,8 +94,8 @@ impl IoHandler<ClientIoMessage> for ClientIoHandler {
             ClientIoMessage::HeaderVerified => {
                 self.client.import_verified_headers();
             }
-            ClientIoMessage::NewTransactions(transactions, peer_id) => {
-                self.client.import_queued_transactions(&transactions, peer_id);
+            ClientIoMessage::NewTransactions(transactions) => {
+                self.client.import_queued_transactions(&transactions);
             }
             ClientIoMessage::NewBlockRequired {
                 parent_block,
diff --git a/sync/src/transaction/extension.rs b/sync/src/transaction/extension.rs
index 354c3ecf86..163f1e3af1 100644
--- a/sync/src/transaction/extension.rs
+++ b/sync/src/transaction/extension.rs
@@ -111,7 +111,6 @@ impl NetworkExtension<Never> for Extension {
 
                     self.client.queue_transactions(
                         transactions.iter().map(|unverified| unverified.rlp_bytes().to_vec()).collect(),
-                        *token,
                     );
                     if let Some(peer) = self.peers.get_mut(token) {
                         let transactions: Vec<_> = transactions