diff --git a/ethcore/src/transaction.rs b/ethcore/src/transaction.rs
index 02f77d5f3..3596f6c21 100644
--- a/ethcore/src/transaction.rs
+++ b/ethcore/src/transaction.rs
@@ -469,6 +469,11 @@ impl SignedTransaction {
 	pub fn is_unsigned(&self) -> bool {
 		self.transaction.is_unsigned()
 	}
+
+	/// Deconstructs this transaction back into `UnverifiedTransaction`
+	pub fn deconstruct(self) -> (UnverifiedTransaction, Address, Option<Public>) {
+		(self.transaction, self.sender, self.public)
+	}
 }
 
 /// Signed Transaction that is a part of canon blockchain.
diff --git a/rpc/src/v1/helpers/light_fetch.rs b/rpc/src/v1/helpers/light_fetch.rs
index ac5902b51..2544f66b0 100644
--- a/rpc/src/v1/helpers/light_fetch.rs
+++ b/rpc/src/v1/helpers/light_fetch.rs
@@ -23,7 +23,7 @@ use ethcore::encoded;
 use ethcore::executed::{Executed, ExecutionError};
 use ethcore::ids::BlockId;
 use ethcore::filter::Filter as EthcoreFilter;
-use ethcore::transaction::{Action, Transaction as EthTransaction, SignedTransaction};
+use ethcore::transaction::{Action, Transaction as EthTransaction, SignedTransaction, LocalizedTransaction};
 use ethcore::receipt::Receipt;
 
 use jsonrpc_core::{BoxFuture, Error};
@@ -65,13 +65,24 @@ pub struct LightFetch {
 /// Extract a transaction at given index.
 pub fn extract_transaction_at_index(block: encoded::Block, index: usize, eip86_transition: u64) -> Option<Transaction> {
 	block.transactions().into_iter().nth(index)
+		// Verify if transaction signature is correct.
 		.and_then(|tx| SignedTransaction::new(tx).ok())
-		.map(|tx| Transaction::from_signed(tx, block.number(), eip86_transition))
-		.map(|mut tx| {
-			tx.block_hash = Some(block.hash().into());
-			tx.transaction_index = Some(index.into());
-			tx
+		.map(|signed_tx| {
+			let (signed, sender, _) = signed_tx.deconstruct();
+			let block_hash = block.hash();
+			let block_number = block.number();
+			let transaction_index = index;
+			let cached_sender = Some(sender);
+
+			LocalizedTransaction {
+				signed,
+				block_number,
+				block_hash,
+				transaction_index,
+				cached_sender,
+			}
 		})
+		.map(|tx| Transaction::from_localized(tx, eip86_transition))
 }
 
 
diff --git a/rpc/src/v1/tests/mocked/eth.rs b/rpc/src/v1/tests/mocked/eth.rs
index 337ef9513..9969ee286 100644
--- a/rpc/src/v1/tests/mocked/eth.rs
+++ b/rpc/src/v1/tests/mocked/eth.rs
@@ -547,7 +547,7 @@ fn rpc_eth_pending_transaction_by_hash() {
 		tester.miner.pending_transactions.lock().insert(H256::zero(), tx);
 	}
 
-	let response = r#"{"jsonrpc":"2.0","result":{"blockHash":null,"blockNumber":"0x0","chainId":null,"condition":null,"creates":null,"from":"0x0f65fe9276bc9a24ae7083ae28e2660ef72df99e","gas":"0x5208","gasPrice":"0x1","hash":"0x41df922fd0d4766fcc02e161f8295ec28522f329ae487f14d811e4b64c8d6e31","input":"0x","nonce":"0x0","publicKey":"0x7ae46da747962c2ee46825839c1ef9298e3bd2e70ca2938495c3693a485ec3eaa8f196327881090ff64cf4fbb0a48485d4f83098e189ed3b7a87d5941b59f789","r":"0x48b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353","raw":"0xf85f800182520894095e7baea6a6c7c4c2dfeb977efac326af552d870a801ba048b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353a0efffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804","s":"0xefffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804","standardV":"0x0","to":"0x095e7baea6a6c7c4c2dfeb977efac326af552d87","transactionIndex":null,"v":"0x1b","value":"0xa"},"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":{"blockHash":null,"blockNumber":null,"chainId":null,"condition":null,"creates":null,"from":"0x0f65fe9276bc9a24ae7083ae28e2660ef72df99e","gas":"0x5208","gasPrice":"0x1","hash":"0x41df922fd0d4766fcc02e161f8295ec28522f329ae487f14d811e4b64c8d6e31","input":"0x","nonce":"0x0","publicKey":"0x7ae46da747962c2ee46825839c1ef9298e3bd2e70ca2938495c3693a485ec3eaa8f196327881090ff64cf4fbb0a48485d4f83098e189ed3b7a87d5941b59f789","r":"0x48b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353","raw":"0xf85f800182520894095e7baea6a6c7c4c2dfeb977efac326af552d870a801ba048b55bfa915ac795c431978d8a6a992b628d557da5ff759b307d495a36649353a0efffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804","s":"0xefffd310ac743f371de3b9f7f9cb56c0b28ad43601b4ab949f53faa07bd2c804","standardV":"0x0","to":"0x095e7baea6a6c7c4c2dfeb977efac326af552d87","transactionIndex":null,"v":"0x1b","value":"0xa"},"id":1}"#;
 	let request = r#"{
 		"jsonrpc": "2.0",
 		"method": "eth_getTransactionByHash",
@@ -863,7 +863,7 @@ fn rpc_eth_sign_transaction() {
 	let response = r#"{"jsonrpc":"2.0","result":{"#.to_owned() +
 		r#""raw":"0x"# + &rlp.to_hex() + r#"","# +
 		r#""tx":{"# +
-		r#""blockHash":null,"blockNumber":"0x0","# +
+		r#""blockHash":null,"blockNumber":null,"# +
 		&format!("\"chainId\":{},", t.chain_id().map_or("null".to_owned(), |n| format!("{}", n))) +
 		r#""condition":null,"creates":null,"# +
 		&format!("\"from\":\"0x{:?}\",", &address) +
diff --git a/rpc/src/v1/tests/mocked/parity_set.rs b/rpc/src/v1/tests/mocked/parity_set.rs
index 1653a1908..ed27862ac 100644
--- a/rpc/src/v1/tests/mocked/parity_set.rs
+++ b/rpc/src/v1/tests/mocked/parity_set.rs
@@ -234,7 +234,7 @@ fn rpc_parity_remove_transaction() {
 	let hash = signed.hash();
 
 	let request = r#"{"jsonrpc": "2.0", "method": "parity_removeTransaction", "params":[""#.to_owned() + &format!("0x{:?}", hash) + r#""], "id": 1}"#;
-	let response = r#"{"jsonrpc":"2.0","result":{"blockHash":null,"blockNumber":"0x0","chainId":null,"condition":null,"creates":null,"from":"0x0000000000000000000000000000000000000002","gas":"0x76c0","gasPrice":"0x9184e72a000","hash":"0xa2e0da8a8064e0b9f93e95a53c2db6d01280efb8ac72a708d25487e67dd0f8fc","input":"0x","nonce":"0x1","publicKey":null,"r":"0x1","raw":"0xe9018609184e72a0008276c0940000000000000000000000000000000000000005849184e72a80800101","s":"0x1","standardV":"0x4","to":"0x0000000000000000000000000000000000000005","transactionIndex":null,"v":"0x0","value":"0x9184e72a"},"id":1}"#;
+	let response = r#"{"jsonrpc":"2.0","result":{"blockHash":null,"blockNumber":null,"chainId":null,"condition":null,"creates":null,"from":"0x0000000000000000000000000000000000000002","gas":"0x76c0","gasPrice":"0x9184e72a000","hash":"0xa2e0da8a8064e0b9f93e95a53c2db6d01280efb8ac72a708d25487e67dd0f8fc","input":"0x","nonce":"0x1","publicKey":null,"r":"0x1","raw":"0xe9018609184e72a0008276c0940000000000000000000000000000000000000005849184e72a80800101","s":"0x1","standardV":"0x4","to":"0x0000000000000000000000000000000000000005","transactionIndex":null,"v":"0x0","value":"0x9184e72a"},"id":1}"#;
 
 	miner.pending_transactions.lock().insert(hash, signed);
 	assert_eq!(io.handle_request_sync(&request), Some(response.to_owned()));
diff --git a/rpc/src/v1/tests/mocked/signer.rs b/rpc/src/v1/tests/mocked/signer.rs
index 0211b5f24..3399cd741 100644
--- a/rpc/src/v1/tests/mocked/signer.rs
+++ b/rpc/src/v1/tests/mocked/signer.rs
@@ -456,7 +456,7 @@ fn should_confirm_sign_transaction_with_rlp() {
 	let response = r#"{"jsonrpc":"2.0","result":{"#.to_owned() +
 		r#""raw":"0x"# + &rlp.to_hex() + r#"","# +
 		r#""tx":{"# +
-		r#""blockHash":null,"blockNumber":"0x0","# +
+		r#""blockHash":null,"blockNumber":null,"# +
 		&format!("\"chainId\":{},", t.chain_id().map_or("null".to_owned(), |n| format!("{}", n))) +
 		r#""condition":null,"creates":null,"# +
 		&format!("\"from\":\"0x{:?}\",", &address) +
diff --git a/rpc/src/v1/tests/mocked/signing.rs b/rpc/src/v1/tests/mocked/signing.rs
index 41c8ec7a0..05199e696 100644
--- a/rpc/src/v1/tests/mocked/signing.rs
+++ b/rpc/src/v1/tests/mocked/signing.rs
@@ -307,7 +307,7 @@ fn should_add_sign_transaction_to_the_queue() {
 	let response = r#"{"jsonrpc":"2.0","result":{"#.to_owned() +
 		r#""raw":"0x"# + &rlp.to_hex() + r#"","# +
 		r#""tx":{"# +
-		r#""blockHash":null,"blockNumber":"0x0","# +
+		r#""blockHash":null,"blockNumber":null,"# +
 		&format!("\"chainId\":{},", t.chain_id().map_or("null".to_owned(), |n| format!("{}", n))) +
 		r#""condition":null,"creates":null,"# +
 		&format!("\"from\":\"0x{:?}\",", &address) +
diff --git a/rpc/src/v1/types/transaction.rs b/rpc/src/v1/types/transaction.rs
index 570c21120..90d512c86 100644
--- a/rpc/src/v1/types/transaction.rs
+++ b/rpc/src/v1/types/transaction.rs
@@ -213,7 +213,7 @@ impl Transaction {
 			hash: t.hash().into(),
 			nonce: t.nonce.into(),
 			block_hash: None,
-			block_number: Some(block_number.into()),
+			block_number: None,
 			transaction_index: None,
 			from: t.sender().into(),
 			to: match t.action {