Consensus Engines Implementation: Aura (#911)

* Generalize BlockImport

 - move ImportBlock, BlockOrigin, ImportResult into shared sr-primitives
 - let Consensus provide  and  traits again
 - update consensus traits to latest development
 - implement traits on client::Client, test_client::TestClient
 - update RHD to use the new import_block API

* Move ImportBlock into consensus-common
* Send import notification in aura tests
* Integrating aura into service
* Make Signatures more generic
* Aura Block Production with the given key
* run aura on the thread pool
* start at exact step start in aura
* Add needed wasm blob, in leiu of better solutions.
* Make API ids consistent with traits and bring upstream for sharing.
* Add decrease_free_balance to Balances module
* Encode `Metadata` once instead of two times
* Bitops include xor
* Upgrade key module.
* Default pages to somewhat bigger.
* Introduce upgrade key into node
* Add `Created` event

substrate/srml/contract/src/lib.rs

@@ -154,6 +154,7 @@ decl_module! {
 		fn deposit_event() = default;
 		// TODO: Change AccountId to staking::Address
 		/// Make a call to a specified account, optionally transferring some balance.
+		/// Make a call to a specified account, optionally transferring some balance.
 		fn call(
 			origin,
 			dest: T::AccountId,
@@ -232,12 +233,14 @@ decl_module! {
 			};
 			let result = ctx.create(origin.clone(), endowment, &mut gas_meter, &ctor_code, &data);
 
-			if let Ok(_) = result {
+			if let Ok(ref r) = result {
 				// Commit all changes that made it thus far into the persistant storage.
 				account_db::DirectAccountDb.commit(ctx.overlay.into_change_set());
 
 				// Then deposit all events produced.
 				ctx.events.into_iter().for_each(Self::deposit_event);
+
+				Self::deposit_event(RawEvent::Created(origin.clone(), r.address.clone()));
 			}
 
 			// Refund cost of the unused gas.
@@ -263,6 +266,9 @@ decl_event! {
 	{
 		/// Transfer happened `from` -> `to` with given `value` as part of a `message-call` or `create`.
 		Transfer(AccountId, AccountId, Balance),
+
+		/// Contract deployed by address at the specified address.
+		Created(AccountId, AccountId),
 	}
 }
 

substrate/srml/contract/src/tests.rs

@@ -617,6 +617,10 @@ fn top_level_create() {
 				phase: Phase::ApplyExtrinsic(0),
 				event: MetaEvent::contract(RawEvent::Transfer(0, derived_address, 11)),
 			},
+			EventRecord {
+				phase: Phase::ApplyExtrinsic(0),
+				event: MetaEvent::contract(RawEvent::Created(0, 1)),
+			},
 		]);
 	});
 }