Merge remote-tracking branch 'origin/sync' into beta

ethcore/src/client/test_client.rs

@@ -89,22 +89,22 @@ impl TestBlockChainClient {
 	}
 
 	/// Set the balance of account `address` to `balance`.
-	pub fn set_balance(&mut self, address: Address, balance: U256) {
+	pub fn set_balance(&self, address: Address, balance: U256) {
 		self.balances.write().unwrap().insert(address, balance);
 	}
 
 	/// Set `code` at `address`.
-	pub fn set_code(&mut self, address: Address, code: Bytes) {
+	pub fn set_code(&self, address: Address, code: Bytes) {
 		self.code.write().unwrap().insert(address, code);
 	}
 
 	/// Set storage `position` to `value` for account `address`.
-	pub fn set_storage(&mut self, address: Address, position: H256, value: H256) {
+	pub fn set_storage(&self, address: Address, position: H256, value: H256) {
 		self.storage.write().unwrap().insert((address, position), value);
 	}
 
 	/// Add blocks to test client.
-	pub fn add_blocks(&mut self, count: usize, with: EachBlockWith) {
+	pub fn add_blocks(&self, count: usize, with: EachBlockWith) {
 		let len = self.numbers.read().unwrap().len();
 		for n in len..(len + count) {
 			let mut header = BlockHeader::new();

ethcore/src/views.rs

@@ -223,6 +223,11 @@ impl<'a> BlockView<'a> {
 	pub fn uncle_hashes(&self) -> Vec<H256> {
 		self.rlp.at(2).iter().map(|rlp| rlp.as_raw().sha3()).collect()
 	}
+
+	/// Return nth uncle.
+	pub fn uncle_at(&self, index: usize) -> Option<Header> {
+		self.rlp.at(2).iter().nth(index).map(|rlp| rlp.as_val())
+	}
 }
 
 impl<'a> Hashable for BlockView<'a> {
@@ -280,7 +285,7 @@ impl<'a> HeaderView<'a> {
 
 	/// Returns block number.
 	pub fn number(&self) -> BlockNumber { self.rlp.val_at(8) }
-	
+
 	/// Returns block gas limit.
 	pub fn gas_limit(&self) -> U256 { self.rlp.val_at(9) }