Add vote and seconded events to Democracy pallet. (paritytech#10352)

* add the events

* spec_version

* Update bin/node/runtime/src/lib.rs

Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

Co-authored-by: Alan Sapede <alan.sapede@gmail.com>
Co-authored-by: Kian Paimani <5588131+kianenigma@users.noreply.github.com>

frame/democracy/src/lib.rs

@@ -539,6 +539,10 @@ pub mod pallet {
 		},
 		/// A proposal_hash has been blacklisted permanently.
 		Blacklisted { proposal_hash: T::Hash },
+		/// An account has voted in a referendum
+		Voted { voter: T::AccountId, ref_index: ReferendumIndex, vote: AccountVote<BalanceOf<T>> },
+		/// An account has secconded a proposal
+		Seconded { seconder: T::AccountId, prop_index: PropIndex },
 	}
 
 	#[pallet::error]
@@ -677,8 +681,9 @@ pub mod pallet {
 			ensure!(seconds <= seconds_upper_bound, Error::<T>::WrongUpperBound);
 			let mut deposit = Self::deposit_of(proposal).ok_or(Error::<T>::ProposalMissing)?;
 			T::Currency::reserve(&who, deposit.1)?;
-			deposit.0.push(who);
+			deposit.0.push(who.clone());
 			<DepositOf<T>>::insert(proposal, deposit);
+			Self::deposit_event(Event::<T>::Seconded { seconder: who, prop_index: proposal });
 			Ok(())
 		}
 
@@ -1378,6 +1383,7 @@ impl<T: Config> Pallet<T> {
 						votes.insert(i, (ref_index, vote));
 					},
 				}
+				Self::deposit_event(Event::<T>::Voted { voter: who.clone(), ref_index, vote });
 				// Shouldn't be possible to fail, but we handle it gracefully.
 				status.tally.add(vote).ok_or(ArithmeticError::Overflow)?;
 				if let Some(approve) = vote.as_standard() {