diff --git a/src/block.rs b/src/block.rs
index e725a69f6..b1207ce53 100644
--- a/src/block.rs
+++ b/src/block.rs
@@ -169,7 +169,7 @@ impl<'x, 'y> OpenBlock<'x, 'y> {
 	/// If valid, it will be executed, and archived together with the receipt.
 	pub fn push_transaction(&mut self, t: Transaction, h: Option<H256>) -> Result<&Receipt, Error> {
 		let env_info = self.env_info();
-		match self.block.state.apply(&env_info, self.engine, &t, true) {
+		match self.block.state.apply(&env_info, self.engine, &t) {
 			Ok(x) => {
 				self.block.archive_set.insert(h.unwrap_or_else(||t.hash()));
 				self.block.archive.push(Entry { transaction: t, receipt: x.receipt });
diff --git a/src/common.rs b/src/common.rs
index 468a722d7..061d0748a 100644
--- a/src/common.rs
+++ b/src/common.rs
@@ -8,4 +8,5 @@ pub use builtin::*;
 pub use header::*;
 pub use account::*;
 pub use transaction::*;
+pub use log_entry::*;
 pub use receipt::*;
\ No newline at end of file
diff --git a/src/lib.rs b/src/lib.rs
index bcf112c10..1b9c055df 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -88,6 +88,7 @@ extern crate ethcore_util as util;
 pub mod common;
 pub mod basic_types;
 pub mod error;
+pub mod log_entry;
 pub mod env_info;
 pub mod engine;
 pub mod state;
diff --git a/src/log_entry.rs b/src/log_entry.rs
new file mode 100644
index 000000000..939d60276
--- /dev/null
+++ b/src/log_entry.rs
@@ -0,0 +1,62 @@
+use util::*;
+use basic_types::LogBloom;
+
+/// A single log's entry.
+pub struct LogEntry {
+	pub address: Address,
+	pub topics: Vec<H256>,
+	pub data: Bytes,
+}
+
+impl RlpStandard for LogEntry {
+	fn rlp_append(&self, s: &mut RlpStream) {
+		s.append_list(3);
+		s.append(&self.address);
+		s.append(&self.topics);
+		s.append(&self.data);
+	}
+}
+
+impl LogEntry {
+	pub fn bloom(&self) -> LogBloom {
+		self.topics.iter().fold(LogBloom::from_bloomed(&self.address.sha3()), |b, t| b.with_bloomed(&t.sha3()))
+	}
+
+	/// Create a new log entry.
+	pub fn new(address: Address, topics: Vec<H256>, data: Bytes) -> LogEntry {
+		LogEntry {
+			address: address,
+			topics: topics,
+			data: data
+		}
+	}
+
+	/// Returns reference to address.
+	pub fn address(&self) -> &Address {
+		&self.address
+	}
+
+	/// Returns reference to topics.
+	pub fn topics(&self) -> &Vec<H256> {
+		&self.topics
+	}
+
+	/// Returns reference to data.
+	pub fn data(&self) -> &Bytes {
+		&self.data
+	}
+}
+
+#[cfg(test)]
+mod tests {
+	use util::*;
+	use super::LogEntry;
+
+	#[test]
+	fn test_empty_log_bloom() {
+		let bloom = H2048::from_str("00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000008800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000800000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000").unwrap();
+		let address = Address::from_str("0f572e5295c57f15886f9b263e2f6d2d6c7b5ec6").unwrap();
+		let log = LogEntry::new(address, vec![], vec![]);
+		assert_eq!(log.bloom(), bloom);
+	}
+}
\ No newline at end of file
diff --git a/src/receipt.rs b/src/receipt.rs
index 5a188f93d..ef46e0f48 100644
--- a/src/receipt.rs
+++ b/src/receipt.rs
@@ -1,27 +1,6 @@
 use util::*;
 use basic_types::LogBloom;
-
-/// A single log's entry.
-pub struct LogEntry {
-	pub address: Address,
-	pub topics: Vec<H256>,
-	pub data: Bytes,
-}
-
-impl RlpStandard for LogEntry {
-	fn rlp_append(&self, s: &mut RlpStream) {
-		s.append_list(3);
-		s.append(&self.address);
-		s.append(&self.topics);
-		s.append(&self.data);
-	}
-}
-
-impl LogEntry {
-	pub fn bloom(&self) -> LogBloom {
-		self.topics.iter().fold(LogBloom::from_bloomed(&self.address.sha3()), |b, t| b.with_bloomed(&t.sha3()))
-	}
-}
+use log_entry::LogEntry;
 
 /// Information describing execution of a transaction.
 pub struct Receipt {
diff --git a/src/state.rs b/src/state.rs
index 569de13bd..03978fc4e 100644
--- a/src/state.rs
+++ b/src/state.rs
@@ -134,7 +134,7 @@ impl State {
 
 	/// Execute a given transaction.
 	/// This will change the state accordingly.
-	pub fn apply(&mut self, _env_info: &EnvInfo, _engine: &Engine, _t: &Transaction, _is_permanent: bool) -> ApplyResult {
+	pub fn apply(&mut self, _env_info: &EnvInfo, _engine: &Engine, _t: &Transaction) -> ApplyResult {
 		unimplemented!();
 	}
 
diff --git a/src/transaction.rs b/src/transaction.rs
index d13a728bb..f162bb2c5 100644
--- a/src/transaction.rs
+++ b/src/transaction.rs
@@ -1,37 +1,33 @@
 use util::*;
 
+pub enum Action {
+	Create,
+	Call(Address),
+}
+
 /// A set of information describing an externally-originating message call
 /// or contract creation operation.
 pub struct Transaction {
 	nonce: U256,
 	gas_price: U256,
 	gas: U256,
-	to: Option<Address>,
+	action: Action,
 	value: U256,
 	data: Bytes,
 
 	hash: RefCell<Option<H256>>, //TODO: make this private
 }
 
-impl Transaction {
-	/// Is this transaction meant to create a contract?
-	pub fn is_contract_creation(&self) -> bool {
-		self.to.is_none()
-	}
-
-	/// Is this transaction meant to send a message?
-	pub fn is_message_call(&self) -> bool {
-		!self.is_contract_creation()
-	}
-}
-
 impl RlpStandard for Transaction {
 	fn rlp_append(&self, s: &mut RlpStream) {
 		s.append_list(6);
 		s.append(&self.nonce);
 		s.append(&self.gas_price);
 		s.append(&self.gas);
-		s.append(&self.to);
+		match self.action {
+			Action::Create => s.append_empty_data(),
+			Action::Call(ref to) => s.append(to),
+		};
 		s.append(&self.value);
 		s.append(&self.data);
 	}
@@ -54,18 +50,19 @@ impl Transaction {
 	pub fn note_dirty(&self) {
  		*self.hash.borrow_mut() = None;
 	}
+
+	/// Returns transaction type.
+	pub fn action(&self) -> &Action { &self.action }
 }
 
-impl Encodable for Transaction {
-	fn encode<E>(&self, encoder: &mut E) where E: Encoder {
-		encoder.emit_list(| e | {
-			self.nonce.encode(e);
-			self.gas_price.encode(e);
-			self.gas.encode(e);
-			self.to.encode(e);
-			self.value.encode(e);
-			self.data.encode(e);
-		})
+impl Decodable for Action {
+	fn decode<D>(decoder: &D) -> Result<Self, DecoderError> where D: Decoder {
+		let rlp = decoder.as_rlp();
+		if rlp.is_empty() {
+			Ok(Action::Create)
+		} else {
+			Ok(Action::Call(try!(rlp.as_val())))
+		}
 	}
 }
 
@@ -77,7 +74,7 @@ impl Decodable for Transaction {
 			nonce: try!(Decodable::decode(&d[0])),
 			gas_price: try!(Decodable::decode(&d[1])),
 			gas: try!(Decodable::decode(&d[2])),
-			to: try!(Decodable::decode(&d[3])),
+			action: try!(Decodable::decode(&d[3])),
 			value: try!(Decodable::decode(&d[4])),
 			data: try!(Decodable::decode(&d[5])),
 			hash: RefCell::new(None)
@@ -86,4 +83,3 @@ impl Decodable for Transaction {
 		Ok(transaction)
 	}
 }
-