Companion for 8166 (Update `storage_kill` return value) (#2488)

* New return value

* update kill outcome

* Update name

* "Update Substrate"

Co-authored-by: parity-processbot <>

parachain/src/wasm_executor/mod.rs

@@ -286,7 +286,7 @@ impl sp_externalities::Externalities for ValidationExternalities {
 		panic!("child_storage: unsupported feature for parachain validation")
 	}
 
-	fn kill_child_storage(&mut self, _: &ChildInfo, _: Option<u32>) -> bool {
+	fn kill_child_storage(&mut self, _: &ChildInfo, _: Option<u32>) -> (bool, u32) {
 		panic!("kill_child_storage: unsupported feature for parachain validation")
 	}
 

runtime/common/src/crowdloan.rs

@@ -486,7 +486,8 @@ decl_module! {
 
 			// Try killing the crowdloan child trie
 			match Self::crowdloan_kill(index) {
-				child::KillOutcome::AllRemoved => {
+				// TODO use this value for refund
+				child::KillChildStorageResult::AllRemoved(_) => {
 					let account = Self::fund_account_id(index);
 					T::Currency::transfer(&account, &fund.owner, fund.deposit, AllowDeath)?;
 
@@ -498,7 +499,8 @@ decl_module! {
 
 					Self::deposit_event(RawEvent::Dissolved(index));
 				},
-				child::KillOutcome::SomeRemaining => {
+				// TODO use this value for refund
+				child::KillChildStorageResult::SomeRemaining(_) => {
 					Self::deposit_event(RawEvent::PartiallyDissolved(index));
 				}
 			}
@@ -569,7 +571,7 @@ impl<T: Config> Module<T> {
 		who.using_encoded(|b| child::kill(&Self::id_from_index(index), b));
 	}
 
-	pub fn crowdloan_kill(index: FundIndex) -> child::KillOutcome {
+	pub fn crowdloan_kill(index: FundIndex) -> child::KillChildStorageResult {
 		child::kill_storage(&Self::id_from_index(index), Some(T::RemoveKeysLimit::get()))
 	}
 }