emit TipClosed event on success tip payout

frame/treasury/src/lib.rs

@@ -549,7 +549,7 @@ decl_module! {
 			// closed.
 			Reasons::<T>::remove(&tip.reason);
 			Tips::<T>::remove(hash);
-			Self::payout_tip(tip);
+			Self::payout_tip(hash, tip);
 		}
 
 		fn on_initialize(n: T::BlockNumber) -> Weight {
@@ -627,7 +627,7 @@ impl<T: Trait> Module<T> {
 	///
 	/// Up to three balance operations.
 	/// Plus `O(T)` (`T` is Tippers length).
-	fn payout_tip(tip: OpenTip<T::AccountId, BalanceOf<T>, T::BlockNumber, T::Hash>) {
+	fn payout_tip(hash: T::Hash, tip: OpenTip<T::AccountId, BalanceOf<T>, T::BlockNumber, T::Hash>) {
 		let mut tips = tip.tips;
 		Self::retain_active_tips(&mut tips);
 		tips.sort_by_key(|i| i.1);
@@ -647,6 +647,7 @@ impl<T: Trait> Module<T> {
 		}
 		// same as above: best-effort only.
 		let _ = T::Currency::transfer(&treasury, &tip.who, payout, KeepAlive);
+		Self::deposit_event(RawEvent::TipClosed(hash, tip.who, payout));
 	}
 
 	// Spend some money!