add feature gate

ledger/src/blockstore_processor.rs

@@ -40,6 +40,7 @@ use {
     },
     solana_sdk::{
         clock::{Slot, MAX_PROCESSING_AGE},
+        feature_set::self,
         genesis_config::GenesisConfig,
         hash::Hash,
         pubkey::Pubkey,
@@ -342,10 +343,7 @@ fn execute_batches(
         })
         .collect::<Vec<_>>();
 
-    // TAO TODO - accumulate transaction cost to bank's cost_tracker, retunr error if cost limits
-    // would be breached. 
-    // This change needs to be feature gated
-    {
+    if bank.feature_set.is_active(&feature_set::apply_cost_tracker_during_replay::id()) {
         let mut cost_tracker = bank.write_cost_tracker().unwrap();
         for tx_cost in &tx_costs {
             match cost_tracker.try_add(tx_cost) {
@@ -1802,7 +1800,6 @@ pub mod tests {
         solana_sdk::{
             account::{AccountSharedData, WritableAccount},
             epoch_schedule::EpochSchedule,
-            feature_set,
             hash::Hash,
             native_token::LAMPORTS_PER_SOL,
             pubkey::Pubkey,

sdk/src/feature_set.rs

@@ -594,6 +594,10 @@ pub mod disable_builtin_loader_ownership_chains {
     solana_sdk::declare_id!("4UDcAfQ6EcA6bdcadkeHpkarkhZGJ7Bpq7wTAiRMjkoi");
 }
 
+pub mod apply_cost_tracker_during_replay {
+    solana_sdk::declare_id!("2ry7ygxiYURULZCrypHhveanvP5tzZ4toRwVp89oCNSj");
+}
+
 lazy_static! {
     /// Map of feature identifiers to user-visible description
     pub static ref FEATURE_NAMES: HashMap<Pubkey, &'static str> = [
@@ -737,6 +741,7 @@ lazy_static! {
         (update_hashes_per_tick::id(), "Update desired hashes per tick on epoch boundary"),
         (enable_big_mod_exp_syscall::id(), "add big_mod_exp syscall #28503"),
         (disable_builtin_loader_ownership_chains::id(), "disable builtin loader ownership chains #29956"),
+        (apply_cost_tracker_during_replay::id(), "apply cost tracker to blocks during replay #29595"),
         /*************** ADD NEW FEATURES HERE ***************/
     ]
     .iter()