Lock times for delegation

frame/democracy/src/lib.rs

@@ -1519,9 +1519,14 @@ impl<T: Config> Pallet<T> {
 			};
 			sp_std::mem::swap(&mut old, voting);
 			match old {
-				Voting::Delegating { balance, target, conviction, delegations, prior, .. } => {
+				Voting::Delegating {
+					balance, target, conviction, delegations, mut prior, ..
+				} => {
 					// remove any delegation votes to our current target.
 					Self::reduce_upstream_delegation(&target, conviction.votes(balance));
+					let now = frame_system::Pallet::<T>::block_number();
+					let lock_periods = conviction.lock_periods().into();
+					prior.accumulate(now + T::VoteLockingPeriod::get() * lock_periods, balance);
 					voting.set_common(delegations, prior);
 				},
 				Voting::Direct { votes, delegations, prior } => {

frame/democracy/src/vote.rs

@@ -183,7 +183,7 @@ impl<Balance: Saturating + Ord + Zero + Copy, BlockNumber: Ord + Copy + Zero, Ac
 		match self {
 			Voting::Direct { votes, prior, .. } =>
 				votes.iter().map(|i| i.1.balance()).fold(prior.locked(), |a, i| a.max(i)),
-			Voting::Delegating { balance, .. } => *balance,
+			Voting::Delegating { balance, prior, .. } => *balance.max(&prior.locked()),
 		}
 	}