pallet-proxy: emit events on proxy added. (#9546)

* pallet-proxy: emit events on proxy added.

* Apply review suggestions.

substrate/frame/proxy/src/lib.rs

@@ -534,7 +534,12 @@ pub mod pallet {
 	}
 
 	#[pallet::event]
-	#[pallet::metadata(T::AccountId = "AccountId", T::ProxyType = "ProxyType", CallHashOf<T> = "Hash")]
+	#[pallet::metadata(
+		T::AccountId = "AccountId",
+		T::ProxyType = "ProxyType",
+		CallHashOf<T> = "Hash",
+		T::BlockNumber = "BlockNumber",
+	)]
 	#[pallet::generate_deposit(pub(super) fn deposit_event)]
 	pub enum Event<T: Config> {
 		/// A proxy was executed correctly, with the given \[result\].
@@ -545,6 +550,8 @@ pub mod pallet {
 		AnonymousCreated(T::AccountId, T::AccountId, T::ProxyType, u16),
 		/// An announcement was placed to make a call in the future. \[real, proxy, call_hash\]
 		Announced(T::AccountId, T::AccountId, CallHashOf<T>),
+		/// A proxy was added. \[delegator, delegatee, proxy_type, delay\]
+		ProxyAdded(T::AccountId, T::AccountId, T::ProxyType, T::BlockNumber),
 	}
 
 	/// Old name generated by `decl_event`.
@@ -646,7 +653,11 @@ impl<T: Config> Pallet<T> {
 	) -> DispatchResult {
 		ensure!(delegator != &delegatee, Error::<T>::NoSelfProxy);
 		Proxies::<T>::try_mutate(delegator, |(ref mut proxies, ref mut deposit)| {
-			let proxy_def = ProxyDefinition { delegate: delegatee, proxy_type, delay };
+			let proxy_def = ProxyDefinition {
+				delegate: delegatee.clone(),
+				proxy_type: proxy_type.clone(),
+				delay,
+			};
 			let i = proxies.binary_search(&proxy_def).err().ok_or(Error::<T>::Duplicate)?;
 			proxies.try_insert(i, proxy_def).map_err(|_| Error::<T>::TooMany)?;
 			let new_deposit = Self::deposit(proxies.len() as u32);
@@ -656,6 +667,12 @@ impl<T: Config> Pallet<T> {
 				T::Currency::unreserve(delegator, *deposit - new_deposit);
 			}
 			*deposit = new_deposit;
+			Self::deposit_event(Event::<T>::ProxyAdded(
+				delegator.clone(),
+				delegatee,
+				proxy_type,
+				delay,
+			));
 			Ok(())
 		})
 	}

substrate/frame/proxy/src/tests.rs

@@ -194,6 +194,7 @@ fn expect_events(e: Vec<Event>) {
 fn announcement_works() {
 	new_test_ext().execute_with(|| {
 		assert_ok!(Proxy::add_proxy(Origin::signed(1), 3, ProxyType::Any, 1));
+		System::assert_last_event(ProxyEvent::ProxyAdded(1, 3, ProxyType::Any, 1).into());
 		assert_ok!(Proxy::add_proxy(Origin::signed(2), 3, ProxyType::Any, 1));
 		assert_eq!(Balances::reserved_balance(3), 0);