diff --git a/ethcore/src/client.rs b/ethcore/src/client.rs
index 90c07f3e6..3aeec6c38 100644
--- a/ethcore/src/client.rs
+++ b/ethcore/src/client.rs
@@ -190,6 +190,7 @@ pub trait BlockChainClient : Sync + Send {
 
 	/// Attempts to seal given block. Returns `SealedBlock` on success and the same block in case of error.
 	fn try_seal(&self, block: ClosedBlock, seal: Vec<Bytes>) -> Result<SealedBlock, ClosedBlock>;
+
 }
 
 #[derive(Default, Clone, Debug, Eq, PartialEq)]
diff --git a/miner/src/miner.rs b/miner/src/miner.rs
index 8e93defcf..d2e839101 100644
--- a/miner/src/miner.rs
+++ b/miner/src/miner.rs
@@ -25,7 +25,7 @@ use ethcore::transaction::SignedTransaction;
 use transaction_queue::{TransactionQueue};
 
 /// Miner client API
-pub trait MinerService {
+pub trait MinerService : Send + Sync {
 
 	/// Returns miner's status.
 	fn status(&self) -> MinerStatus;
diff --git a/parity/main.rs b/parity/main.rs
index c73f971d9..54602c4a2 100644
--- a/parity/main.rs
+++ b/parity/main.rs
@@ -50,7 +50,7 @@ use ethcore::spec::*;
 use ethcore::client::*;
 use ethcore::service::{ClientService, NetSyncMessage};
 use ethcore::ethereum;
-use ethsync::{EthSync, SyncConfig};
+use ethsync::{EthSync, SyncConfig, SyncStatusProvider};
 use ethminer::{Miner, MinerService};
 use docopt::Docopt;
 use daemonize::Daemonize;
diff --git a/rpc/src/v1/helpers/poll_manager.rs b/rpc/src/v1/helpers/poll_manager.rs
index 36a6352c2..0297384d1 100644
--- a/rpc/src/v1/helpers/poll_manager.rs
+++ b/rpc/src/v1/helpers/poll_manager.rs
@@ -84,7 +84,7 @@ impl<F, T> PollManager<F, T> where T: Timer {
 	}
 
 	/// Returns number of block when last poll happend.
-	pub fn get_poll_info(&mut self, id: &PollId) -> Option<&PollInfo<F>> {
+	pub fn poll_info(&mut self, id: &PollId) -> Option<&PollInfo<F>> {
 		self.polls.prune();
 		self.polls.get(id)
 	}
@@ -124,21 +124,21 @@ mod tests {
 
 		*time.borrow_mut() = 10;
 		indexer.update_poll(&0, 21);
-		assert_eq!(indexer.get_poll_info(&0).unwrap().filter, false);
-		assert_eq!(indexer.get_poll_info(&0).unwrap().block_number, 21);
+		assert_eq!(indexer.poll_info(&0).unwrap().filter, false);
+		assert_eq!(indexer.poll_info(&0).unwrap().block_number, 21);
 
 		*time.borrow_mut() = 30;
 		indexer.update_poll(&1, 23);
-		assert_eq!(indexer.get_poll_info(&1).unwrap().filter, true);
-		assert_eq!(indexer.get_poll_info(&1).unwrap().block_number, 23);
+		assert_eq!(indexer.poll_info(&1).unwrap().filter, true);
+		assert_eq!(indexer.poll_info(&1).unwrap().block_number, 23);
 
 		*time.borrow_mut() = 75;
 		indexer.update_poll(&0, 30);
-		assert!(indexer.get_poll_info(&0).is_none());
-		assert_eq!(indexer.get_poll_info(&1).unwrap().filter, true);
-		assert_eq!(indexer.get_poll_info(&1).unwrap().block_number, 23);
+		assert!(indexer.poll_info(&0).is_none());
+		assert_eq!(indexer.poll_info(&1).unwrap().filter, true);
+		assert_eq!(indexer.poll_info(&1).unwrap().block_number, 23);
 
 		indexer.remove_poll(&1);
-		assert!(indexer.get_poll_info(&1).is_none());
+		assert!(indexer.poll_info(&1).is_none());
 	}
 }
diff --git a/rpc/src/v1/impls/eth.rs b/rpc/src/v1/impls/eth.rs
index a9ee389f8..38ecb4f35 100644
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@@ -18,8 +18,8 @@
 use std::collections::HashMap;
 use std::sync::{Arc, Weak, Mutex, RwLock};
 use std::ops::Deref;
-use ethsync::{EthSync, SyncState};
-use ethminer::{Miner, MinerService};
+use ethsync::{SyncStatusProvider, SyncState};
+use ethminer::{MinerService};
 use jsonrpc_core::*;
 use util::numbers::*;
 use util::sha3::*;
@@ -27,7 +27,6 @@ use util::rlp::encode;
 use ethcore::client::*;
 use ethcore::block::{IsBlock};
 use ethcore::views::*;
-//#[macro_use] extern crate log;
 use ethcore::ethereum::Ethash;
 use ethcore::ethereum::denominations::shannon;
 use v1::traits::{Eth, EthFilter};
@@ -35,16 +34,20 @@ use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, SyncIn
 use v1::helpers::{PollFilter, PollManager};
 
 /// Eth rpc implementation.
-pub struct EthClient {
-	client: Weak<Client>,
-	sync: Weak<EthSync>,
-	miner: Weak<Miner>,
+pub struct EthClient<C, S, M>
+	where C: BlockChainClient,
+		  S: SyncStatusProvider,
+		  M: MinerService {
+	client: Weak<C>,
+	sync: Weak<S>,
+	miner: Weak<M>,
 	hashrates: RwLock<HashMap<H256, u64>>,
 }
 
-impl EthClient {
+impl<C, S, M> EthClient<C, S, M> where C: BlockChainClient, S: SyncStatusProvider, M: MinerService {
+
 	/// Creates new EthClient.
-	pub fn new(client: &Arc<Client>, sync: &Arc<EthSync>, miner: &Arc<Miner>) -> Self {
+	pub fn new(client: &Arc<C>, sync: &Arc<S>, miner: &Arc<M>) -> Self {
 		EthClient {
 			client: Arc::downgrade(client),
 			sync: Arc::downgrade(sync),
@@ -99,7 +102,10 @@ impl EthClient {
 	}
 }
 
-impl Eth for EthClient {
+impl<C, S, M> Eth for EthClient<C, S, M>
+	where C: BlockChainClient + 'static,
+		  S: SyncStatusProvider + 'static,
+		  M: MinerService + 'static {
 	fn protocol_version(&self, params: Params) -> Result<Value, Error> {
 		match params {
 			Params::None => to_value(&U256::from(take_weak!(self.sync).status().protocol_version)),
@@ -262,14 +268,14 @@ impl Eth for EthClient {
 }
 
 /// Eth filter rpc implementation.
-pub struct EthFilterClient {
-	client: Weak<Client>,
+pub struct EthFilterClient<C> where C: BlockChainClient {
+	client: Weak<C>,
 	polls: Mutex<PollManager<PollFilter>>,
 }
 
-impl EthFilterClient {
+impl<C> EthFilterClient<C> where C: BlockChainClient {
 	/// Creates new Eth filter client.
-	pub fn new(client: &Arc<Client>) -> Self {
+	pub fn new(client: &Arc<C>) -> Self {
 		EthFilterClient {
 			client: Arc::downgrade(client),
 			polls: Mutex::new(PollManager::new())
@@ -277,7 +283,7 @@ impl EthFilterClient {
 	}
 }
 
-impl EthFilter for EthFilterClient {
+impl<C> EthFilter for EthFilterClient<C> where C: BlockChainClient + 'static {
 	fn new_filter(&self, params: Params) -> Result<Value, Error> {
 		from_params::<(Filter,)>(params)
 			.and_then(|(filter,)| {
@@ -313,7 +319,7 @@ impl EthFilter for EthFilterClient {
 		let client = take_weak!(self.client);
 		from_params::<(Index,)>(params)
 			.and_then(|(index,)| {
-				let info = self.polls.lock().unwrap().get_poll_info(&index.value()).cloned();
+				let info = self.polls.lock().unwrap().poll_info(&index.value()).cloned();
 				match info {
 					None => Ok(Value::Array(vec![] as Vec<Value>)),
 					Some(info) => match info.filter {
diff --git a/rpc/src/v1/impls/net.rs b/rpc/src/v1/impls/net.rs
index 9e24caad2..a686ed66f 100644
--- a/rpc/src/v1/impls/net.rs
+++ b/rpc/src/v1/impls/net.rs
@@ -17,24 +17,24 @@
 //! Net rpc implementation.
 use std::sync::{Arc, Weak};
 use jsonrpc_core::*;
-use ethsync::EthSync;
+use ethsync::SyncStatusProvider;
 use v1::traits::Net;
 
 /// Net rpc implementation.
-pub struct NetClient {
-	sync: Weak<EthSync>
+pub struct NetClient<S> where S: SyncStatusProvider {
+	sync: Weak<S>
 }
 
-impl NetClient {
+impl<S> NetClient<S> where S: SyncStatusProvider {
 	/// Creates new NetClient.
-	pub fn new(sync: &Arc<EthSync>) -> Self {
+	pub fn new(sync: &Arc<S>) -> Self {
 		NetClient {
 			sync: Arc::downgrade(sync)
 		}
 	}
 }
 
-impl Net for NetClient {
+impl<S> Net for NetClient<S> where S: SyncStatusProvider + 'static {
 	fn version(&self, _: Params) -> Result<Value, Error> {
 		Ok(Value::U64(take_weak!(self.sync).status().protocol_version as u64))
 	}
diff --git a/sync/src/chain.rs b/sync/src/chain.rs
index 85f5d6510..6593caf02 100644
--- a/sync/src/chain.rs
+++ b/sync/src/chain.rs
@@ -1275,7 +1275,6 @@ impl ChainSync {
 	pub fn chain_new_head(&mut self, io: &mut SyncIo) {
 		self.miner.prepare_sealing(io.chain());
 	}
-
 }
 
 #[cfg(test)]
diff --git a/sync/src/lib.rs b/sync/src/lib.rs
index 0ce12706b..e0158a564 100644
--- a/sync/src/lib.rs
+++ b/sync/src/lib.rs
@@ -93,6 +93,12 @@ impl Default for SyncConfig {
 	}
 }
 
+/// Current sync status
+pub trait SyncStatusProvider: Send + Sync {
+	/// Get sync status
+	fn status(&self) -> SyncStatus;
+}
+
 /// Ethereum network protocol handler
 pub struct EthSync {
 	/// Shared blockchain client. TODO: this should evetually become an IPC endpoint
@@ -114,11 +120,6 @@ impl EthSync {
 		sync
 	}
 
-	/// Get sync status
-	pub fn status(&self) -> SyncStatus {
-		self.sync.read().unwrap().status()
-	}
-
 	/// Stop sync
 	pub fn stop(&mut self, io: &mut NetworkContext<SyncMessage>) {
 		self.sync.write().unwrap().abort(&mut NetSyncIo::new(io, self.chain.deref()));
@@ -128,6 +129,14 @@ impl EthSync {
 	pub fn restart(&mut self, io: &mut NetworkContext<SyncMessage>) {
 		self.sync.write().unwrap().restart(&mut NetSyncIo::new(io, self.chain.deref()));
 	}
+
+}
+
+impl SyncStatusProvider for EthSync {
+	/// Get sync status
+	fn status(&self) -> SyncStatus {
+		self.sync.read().unwrap().status()
+	}
 }
 
 impl NetworkProtocolHandler<SyncMessage> for EthSync {
diff --git a/sync/src/tests/helpers.rs b/sync/src/tests/helpers.rs
index 52a1feba4..4a5ba3cb6 100644
--- a/sync/src/tests/helpers.rs
+++ b/sync/src/tests/helpers.rs
@@ -15,18 +15,18 @@
 // along with Parity.  If not, see <http://www.gnu.org/licenses/>.
 
 use util::*;
+use ::SyncConfig;
 use ethcore::client::{BlockChainClient, BlockStatus, TreeRoute, BlockChainInfo, TransactionId, BlockId, BlockQueueInfo};
 use ethcore::header::{Header as BlockHeader, BlockNumber};
-use ethcore::block::*;
 use ethcore::error::*;
-use ethminer::Miner;
-use io::SyncIo;
-use chain::ChainSync;
-use ::SyncConfig;
 use ethcore::receipt::Receipt;
 use ethcore::transaction::{LocalizedTransaction, SignedTransaction, Transaction, Action};
 use ethcore::filter::Filter;
 use ethcore::log_entry::LocalizedLogEntry;
+use ethcore::block::{ClosedBlock, SealedBlock};
+use ethminer::Miner;
+use io::SyncIo;
+use chain::ChainSync;
 
 pub struct TestBlockChainClient {
 	pub blocks: RwLock<HashMap<H256, Bytes>>,