From 6498e4fbf6f1218cfdb8bdcbcb23306ffbb9b3ba Mon Sep 17 00:00:00 2001
From: Trent Nelson <trent@solana.com>
Date: Tue, 28 Jul 2020 18:57:30 -0600
Subject: [PATCH] Rerere-enable RecentBlockhashes fix on testnet (epoch 76)

---
 runtime/src/bank.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/runtime/src/bank.rs b/runtime/src/bank.rs
index b421ead4d0..31f8aa0d6e 100644
--- a/runtime/src/bank.rs
+++ b/runtime/src/bank.rs
@@ -2832,7 +2832,7 @@ impl Bank {
     fn fix_recent_blockhashes_sysvar_delay(&self) -> bool {
         let activation_slot = match self.operating_mode() {
             OperatingMode::Development => 0,
-            OperatingMode::Preview => Slot::MAX / 2,
+            OperatingMode::Preview => 27_740_256, // Epoch 76
             OperatingMode::Stable => Slot::MAX / 2,
         };