Use rank_stakes() in LeaderScheduler

src/active_stakers.rs

@@ -15,7 +15,7 @@ fn is_active_staker(vote_state: &VoteState, lower_bound: u64, upper_bound: u64)
         .is_some()
 }
 
-fn rank_stakes(stakes: &mut Vec<(Pubkey, u64)>) {
+pub fn rank_stakes(stakes: &mut Vec<(Pubkey, u64)>) {
     // Rank first by stake. If stakes are the same we rank by pubkey to ensure a
     // deterministic result.
     // Note: Use unstable sort, because we dedup right after to remove the equal elements.

src/leader_scheduler.rs

@@ -1,7 +1,7 @@
 //! The `leader_scheduler` module implements a structure and functions for tracking and
 //! managing the schedule for leader rotation
 
-use crate::active_stakers::{ActiveStakers, DEFAULT_ACTIVE_WINDOW_TICK_LENGTH};
+use crate::active_stakers::{self, ActiveStakers, DEFAULT_ACTIVE_WINDOW_TICK_LENGTH};
 use crate::entry::{create_ticks, next_entry_mut, Entry};
 use crate::voting_keypair::VotingKeypair;
 use bincode::serialize;
@@ -300,14 +300,7 @@ impl LeaderScheduler {
                 }
             })
             .collect();
-
-        active_accounts.sort_by(|(pubkey1, stake1), (pubkey2, stake2)| {
-            if stake1 == stake2 {
-                pubkey1.cmp(&pubkey2)
-            } else {
-                stake1.cmp(&stake2)
-            }
-        });
+        active_stakers::rank_stakes(&mut active_accounts);
         active_accounts
     }