From 30bccc0c68728149e8b159b20a399a5236e38238 Mon Sep 17 00:00:00 2001
From: Pankaj Garg <pankaj@solana.com>
Date: Thu, 28 Feb 2019 15:18:08 -0800
Subject: [PATCH] Fix slot index used while calculating leader schedule

- slot_leader_at() was using absolute slot number instead of index in the epoch
---
 src/leader_schedule_utils.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/leader_schedule_utils.rs b/src/leader_schedule_utils.rs
index 1731f8b47e..354d0f6328 100644
--- a/src/leader_schedule_utils.rs
+++ b/src/leader_schedule_utils.rs
@@ -36,8 +36,9 @@ pub fn slot_leader(bank: &Bank) -> Pubkey {
 
 /// Return the leader for the given slot.
 pub fn slot_leader_at(slot: u64, bank: &Bank) -> Pubkey {
-    let epoch = slot / bank.slots_per_epoch();
-    slot_leader_by(bank, |_, _, _| (slot, epoch))
+    slot_leader_by(bank, |_, _, _| {
+        (slot % bank.slots_per_epoch(), slot / bank.slots_per_epoch())
+    })
 }
 
 /// Return the epoch height and slot index of the slot before the current slot.