Owning views of blockchain data (#3982)

* owning views of blockchain data

* port blockchain and client traits to owning views

* fix ethcore tests

* use strong headers and bodies in ethcore_light

* port ethsync to use owning views

* port rpc to owning views

* port parity informant and blockchain export

ethcore/src/views/block.rs

@@ -94,7 +94,7 @@ impl<'a> BlockView<'a> {
 	}
 
 	/// Return List of transactions in given block.
-	pub fn transaction_views(&self) -> Vec<TransactionView> {
+	pub fn transaction_views(&self) -> Vec<TransactionView<'a>> {
 		self.rlp.at(1).iter().map(TransactionView::new_from_rlp).collect()
 	}
 
@@ -132,7 +132,7 @@ impl<'a> BlockView<'a> {
 	}
 
 	/// Return List of transactions in given block.
-	pub fn uncle_views(&self) -> Vec<HeaderView> {
+	pub fn uncle_views(&self) -> Vec<HeaderView<'a>> {
 		self.rlp.at(2).iter().map(HeaderView::new_from_rlp).collect()
 	}
 

ethcore/src/views/body.rs

@@ -71,7 +71,7 @@ impl<'a> BodyView<'a> {
 	}
 
 	/// Return List of transactions in given block.
-	pub fn transaction_views(&self) -> Vec<TransactionView> {
+	pub fn transaction_views(&self) -> Vec<TransactionView<'a>> {
 		self.rlp.at(0).iter().map(TransactionView::new_from_rlp).collect()
 	}
 
@@ -106,7 +106,7 @@ impl<'a> BodyView<'a> {
 	}
 
 	/// Return List of transactions in given block.
-	pub fn uncle_views(&self) -> Vec<HeaderView> {
+	pub fn uncle_views(&self) -> Vec<HeaderView<'a>> {
 		self.rlp.at(1).iter().map(HeaderView::new_from_rlp).collect()
 	}