few additional rpc eth methods

ethcore/src/views.rs

@@ -139,6 +139,11 @@ impl<'a> BlockView<'a> {
 		self.rlp.val_at(1)
 	}
 
+	/// Return number of transactions in given block, without deserializing them.
+	pub fn transactions_count(&self) -> usize {
+		self.rlp.at(1).iter().count()
+	}
+
 	/// Return List of transactions in given block.
 	pub fn transaction_views(&self) -> Vec<TransactionView> {
 		self.rlp.at(1).iter().map(TransactionView::new_from_rlp).collect()
@@ -154,6 +159,11 @@ impl<'a> BlockView<'a> {
 		self.rlp.val_at(2)
 	}
 
+	/// Return number of uncles in given block, without deserializing them.
+	pub fn uncles_count(&self) -> usize {
+		self.rlp.at(2).iter().count()
+	}
+
 	/// Return List of transactions in given block.
 	pub fn uncle_views(&self) -> Vec<HeaderView> {
 		self.rlp.at(2).iter().map(HeaderView::new_from_rlp).collect()