diff --git a/src/block.rs b/src/block.rs
index efde03c2d..3d882fd09 100644
--- a/src/block.rs
+++ b/src/block.rs
@@ -1,8 +1,53 @@
 use util::hash::*;
 use util::hashdb::*;
 use util::overlaydb::*;
+use util::rlp::*;
+use util::sha3::*;
 use blockheader::*;
 use state::*;
+use transaction::*;
+
+/// view onto block rlp
+pub struct BlockView<'a> {
+	rlp: Rlp<'a>
+}
+
+impl<'a> BlockView<'a> {
+	pub fn new(bytes: &'a [u8]) -> BlockView<'a> {
+		BlockView {
+			rlp: Rlp::new(bytes)
+		}
+	}
+
+	pub fn new_from_rlp(rlp: Rlp<'a>) -> BlockView<'a> {
+		BlockView {
+			rlp: rlp
+		}
+	}
+
+	pub fn rlp(&self) -> &Rlp<'a> { &self.rlp }
+	pub fn header(&self) -> Header { self.rlp.val_at(0) }
+
+	pub fn header_view(&self) -> HeaderView<'a> { 
+		HeaderView::new_from_rlp(self.rlp.at(0)) 
+	}
+
+	pub fn transactions(&self) -> Vec<Transaction> {
+		self.rlp.val_at(1)
+	}
+
+	pub fn transaction_hashes(&self) -> Vec<H256> { 
+		self.rlp.at(1).iter().map(|rlp| rlp.raw().sha3()).collect()
+	}
+
+	pub fn uncles(&self) -> Vec<Header> {
+		self.rlp.val_at(2)
+	}
+
+	pub fn uncle_hashes(&self) -> Vec<H256> { 
+		self.rlp.at(2).iter().map(|rlp| rlp.raw().sha3()).collect()
+	}
+}
 
 /// Active model of a block within the blockchain
 pub struct Block {
diff --git a/src/blockchain.rs b/src/blockchain.rs
index c5d74a6de..7c385018e 100644
--- a/src/blockchain.rs
+++ b/src/blockchain.rs
@@ -17,6 +17,7 @@ use importroute::*;
 use account::*;
 use genesis::*;
 use extras::*;
+use transaction::*;
 
 pub struct BlockChain {
 	// rlp list of 3
@@ -153,49 +154,62 @@ impl BlockChain {
 	/// Returns true if the given block is known 
 	/// (though not necessarily a part of the canon chain).
 	pub fn is_known(&self, hash: &H256) -> bool {
-		// TODO: first do lookup in blocks_db for given hash
-
 		// TODO: consider taking into account current block
+		// TODO: first do lookup in blocks_db for given hash
+		// TODO: is comparing block numbers necessery?
 		match self.query_extras(hash, &self.block_details) {
 			None => false,
 			Some(details) => details.number <= self.last_block_number
 		}
 	}
 
+	/// Returns true if transaction is known.
+	pub fn is_known_transaction(&self, hash: &H256) -> bool {
+		self.query_extras_exist(hash, &self.transaction_addresses)
+	}
+
 	/// Returns reference to genesis hash
 	pub fn genesis_hash(&self) -> &H256 {
 		&self.genesis_hash
 	}
 
-	/// Get the hash of given block's number
-	pub fn number_hash(&self, hash: &U256) -> Option<H256> {
-		self.query_extras(hash, &self.block_hashes)
-	}
-
 	/// Get the partial-header of a block
 	pub fn block_header(&self, hash: &H256) -> Option<Header> {
-		match self.block(hash) {
-			Some(bytes) => Some(BlockView::new(&bytes).header()),
-			None => None
-		}
+		self.block(hash).map(|bytes| BlockView::new(&bytes).header())
+	}
+
+	/// Get a list of transactions for a given block.
+	/// Returns None is block deos not exist.
+	pub fn transactions(&self, hash: &H256) -> Option<Vec<Transaction>> {
+		self.block(hash).map(|bytes| BlockView::new(&bytes).transactions())
 	}
 
 	/// Get a list of transaction hashes for a given block.
 	/// Returns None if block does not exist.
 	pub fn transaction_hashes(&self, hash: &H256) -> Option<Vec<H256>> {
-		match self.block(hash) {
-			Some(bytes) => Some(BlockView::new(&bytes).transaction_hashes()),
-			None => None
-		}
+		self.block(hash).map(|bytes| BlockView::new(&bytes).transaction_hashes())
+	}
+
+	/// Get a list of uncles for a given block.
+	/// Returns None is block deos not exist.
+	pub fn uncles(&self, hash: &H256) -> Option<Vec<Header>> {
+		self.block(hash).map(|bytes| BlockView::new(&bytes).uncles())
 	}
 
 	/// Get a list of uncle hashes for a given block.
 	/// Returns None if block does not exist.
 	pub fn uncle_hashes(&self, hash: &H256) -> Option<Vec<H256>> {
-		match self.block(hash) {
-			Some(bytes) => Some(BlockView::new(&bytes).uncle_hashes()),
-			None => None
-		}
+		self.block(hash).map(|bytes| BlockView::new(&bytes).uncle_hashes())
+	}
+
+	/// Get the familial details concerning a block.
+	pub fn block_details(&self, hash: &H256) -> Option<BlockDetails> {
+		self.query_extras(hash, &self.block_details)
+	}
+
+	/// Get the hash of given block's number
+	pub fn number_hash(&self, hash: &U256) -> Option<H256> {
+		self.query_extras(hash, &self.block_hashes)
 	}
 
 	/// Get the transactions' log blooms of a block
diff --git a/src/blockheader.rs b/src/blockheader.rs
index baa79a15b..177d52ace 100644
--- a/src/blockheader.rs
+++ b/src/blockheader.rs
@@ -4,31 +4,6 @@ use util::uint::*;
 use util::rlp::*;
 use util::sha3;
 
-/// view onto block rlp
-pub struct BlockView<'a> {
-	rlp: Rlp<'a>
-}
-
-impl<'a> BlockView<'a> {
-	pub fn new(bytes: &'a [u8]) -> BlockView<'a> {
-		BlockView {
-			rlp: Rlp::new(bytes)
-		}
-	}
-
-	pub fn new_from_rlp(rlp: Rlp<'a>) -> BlockView<'a> {
-		BlockView {
-			rlp: rlp
-		}
-	}
-
-	pub fn rlp(&self) -> &Rlp<'a> { &self.rlp }
-	pub fn header(&self) -> Header { self.rlp.val_at(0) }
-	pub fn header_view(&self) -> HeaderView<'a> { HeaderView::new_from_rlp(self.rlp.at(0)) }
-	pub fn transaction_hashes(&self) -> Vec<H256> { self.rlp.val_at(1) }
-	pub fn uncle_hashes(&self) -> Vec<H256> { self.rlp.val_at(2) }
-}
-
 /// view onto block header rlp
 pub struct HeaderView<'a> {
 	rlp: Rlp<'a>
diff --git a/src/genesis.rs b/src/genesis.rs
index 16cbab3e1..0c9640fe8 100644
--- a/src/genesis.rs
+++ b/src/genesis.rs
@@ -103,6 +103,7 @@ impl Genesis {
 
 #[test]
 fn test_genesis() {
+	use block::*;
 	use blockheader::*;
 
 	let g = Genesis::new_frontier();