diff --git a/ethcore/src/blockchain.rs b/ethcore/src/blockchain.rs
index febadfc52..f7c45d94e 100644
--- a/ethcore/src/blockchain.rs
+++ b/ethcore/src/blockchain.rs
@@ -23,6 +23,24 @@ use extras::*;
 use transaction::*;
 use views::*;
 
+/// Uniquely identifies block.
+pub enum BlockId {
+	/// Block's sha3.
+	/// Querying by hash is always faster.
+	Hash(H256),
+	/// Block number within canon blockchain.
+	Number(BlockNumber)
+}
+
+/// Uniquely identifies transaction.
+pub enum TransactionId {
+	/// Transaction's sha3.
+	Hash(H256),
+	/// Block id and transaction index within this block.
+	/// Querying by block position is always faster.
+	BlockPosition(BlockId, usize)
+}
+
 /// Represents a tree route between `from` block and `to` block:
 pub struct TreeRoute {
 	/// A vector of hashes of all blocks, ordered from `from` to `to`.
@@ -674,7 +692,6 @@ mod tests {
 	use util::hash::*;
 	use blockchain::*;
 	use tests::helpers::*;
-	use views::TransactionId;
 
 	#[test]
 	fn valid_tests_extra32() {
diff --git a/ethcore/src/client.rs b/ethcore/src/client.rs
index 93038af48..3de5c097e 100644
--- a/ethcore/src/client.rs
+++ b/ethcore/src/client.rs
@@ -18,8 +18,8 @@
 
 use util::*;
 use rocksdb::{Options, DB, DBCompactionStyle};
-use blockchain::{BlockChain, BlockProvider, CacheSize};
-use views::{BlockView, TransactionId};
+use blockchain::{BlockChain, BlockProvider, CacheSize, TransactionId};
+use views::BlockView;
 use error::*;
 use header::BlockNumber;
 use state::State;
diff --git a/ethcore/src/views.rs b/ethcore/src/views.rs
index a49c06708..4a7ff054d 100644
--- a/ethcore/src/views.rs
+++ b/ethcore/src/views.rs
@@ -19,22 +19,6 @@ use util::*;
 use header::*;
 use transaction::*;
 
-/// Uniquely identifies block.
-pub enum BlockId {
-	/// Block's sha3.
-	Hash(H256),
-	/// Block number within canon blockchain.
-	Number(BlockNumber)
-}
-
-/// Uniquely identifies transaction.
-pub enum TransactionId {
-	/// Transaction's sha3.
-	Hash(H256),
-	/// Block id and transaction index within this block.
-	BlockPosition(BlockId, usize)
-}
-
 /// View onto transaction rlp.
 pub struct TransactionView<'a> {
 	rlp: Rlp<'a>
diff --git a/rpc/src/v1/impls/eth.rs b/rpc/src/v1/impls/eth.rs
index c21157599..32c1919bf 100644
--- a/rpc/src/v1/impls/eth.rs
+++ b/rpc/src/v1/impls/eth.rs
@@ -22,6 +22,7 @@ use util::uint::*;
 use util::sha3::*;
 use ethcore::client::*;
 use ethcore::views::*;
+use ethcore::blockchain::{BlockId, TransactionId};
 use v1::traits::{Eth, EthFilter};
 use v1::types::{Block, BlockTransactions, BlockNumber, Bytes, SyncStatus, Transaction, OptionalValue, Index};
 
diff --git a/sync/src/tests/helpers.rs b/sync/src/tests/helpers.rs
index d392fc653..f8c08dc93 100644
--- a/sync/src/tests/helpers.rs
+++ b/sync/src/tests/helpers.rs
@@ -23,7 +23,7 @@ use io::SyncIo;
 use chain::{ChainSync};
 use ethcore::receipt::Receipt;
 use ethcore::transaction::LocalizedTransaction;
-use ethcore::views::TransactionId;
+use ethcore::blockchain::TransactionId;
 
 pub struct TestBlockChainClient {
 	pub blocks: RwLock<HashMap<H256, Bytes>>,