From 0b6d939e21926c8e9cb2e071c40f4c2dd6af0472 Mon Sep 17 00:00:00 2001
From: Brooks <brooks@solana.com>
Date: Wed, 13 Dec 2023 15:30:39 -0500
Subject: [PATCH] Removes epoch_accounts_hash featurization (#34417)

---
 core/tests/epoch_accounts_hash.rs  |  4 ----
 runtime/src/bank.rs                | 12 +-----------
 runtime/src/bank/serde_snapshot.rs |  4 +---
 runtime/src/bank_forks.rs          |  8 --------
 4 files changed, 2 insertions(+), 26 deletions(-)

diff --git a/core/tests/epoch_accounts_hash.rs b/core/tests/epoch_accounts_hash.rs
index 2ee63e6ef68708..f0fdad6cf5c561 100755
--- a/core/tests/epoch_accounts_hash.rs
+++ b/core/tests/epoch_accounts_hash.rs
@@ -32,7 +32,6 @@ use {
     solana_sdk::{
         clock::Slot,
         epoch_schedule::EpochSchedule,
-        feature_set,
         native_token::LAMPORTS_PER_SOL,
         pubkey::Pubkey,
         signature::{Keypair, Signer},
@@ -145,9 +144,6 @@ impl TestEnvironment {
             Arc::clone(&bank_forks),
         );
         let bank = bank_forks.read().unwrap().working_bank();
-        assert!(bank
-            .feature_set
-            .is_active(&feature_set::epoch_accounts_hash::id()));
         assert!(epoch_accounts_hash_utils::is_enabled_this_epoch(&bank));
 
         bank.set_startup_verification_complete();
diff --git a/runtime/src/bank.rs b/runtime/src/bank.rs
index 72d564ed68685f..b9231db8f9918b 100644
--- a/runtime/src/bank.rs
+++ b/runtime/src/bank.rs
@@ -7013,13 +7013,6 @@ impl Bank {
     /// The epoch accounts hash is hashed into the bank's hash once per epoch at a predefined slot.
     /// Should it be included in *this* bank?
     fn should_include_epoch_accounts_hash(&self) -> bool {
-        if !self
-            .feature_set
-            .is_active(&feature_set::epoch_accounts_hash::id())
-        {
-            return false;
-        }
-
         if !epoch_accounts_hash_utils::is_enabled_this_epoch(self) {
             return false;
         }
@@ -8089,10 +8082,7 @@ impl Bank {
     /// EAH *must* be included.  This means if an EAH calculation is currently in-flight we will
     /// wait for it to complete.
     pub fn get_epoch_accounts_hash_to_serialize(&self) -> Option<EpochAccountsHash> {
-        let should_get_epoch_accounts_hash = self
-            .feature_set
-            .is_active(&feature_set::epoch_accounts_hash::id())
-            && epoch_accounts_hash_utils::is_enabled_this_epoch(self)
+        let should_get_epoch_accounts_hash = epoch_accounts_hash_utils::is_enabled_this_epoch(self)
             && epoch_accounts_hash_utils::is_in_calculation_window(self);
         if !should_get_epoch_accounts_hash {
             return None;
diff --git a/runtime/src/bank/serde_snapshot.rs b/runtime/src/bank/serde_snapshot.rs
index e1746c52b79f75..9c7ad83b5fd778 100644
--- a/runtime/src/bank/serde_snapshot.rs
+++ b/runtime/src/bank/serde_snapshot.rs
@@ -6,7 +6,7 @@ mod tests {
                 epoch_accounts_hash_utils, test_utils as bank_test_utils, Bank, BankTestConfig,
                 EpochRewardStatus, StartBlockHeightAndRewards,
             },
-            genesis_utils::{activate_all_features, activate_feature},
+            genesis_utils::activate_all_features,
             runtime_config::RuntimeConfig,
             serde_snapshot::{
                 reserialize_bank_with_new_accounts_hash, BankIncrementalSnapshotPersistence,
@@ -34,7 +34,6 @@ mod tests {
         },
         solana_sdk::{
             epoch_schedule::EpochSchedule,
-            feature_set,
             genesis_config::create_genesis_config,
             hash::Hash,
             pubkey::Pubkey,
@@ -100,7 +99,6 @@ mod tests {
     ) {
         solana_logger::setup();
         let (mut genesis_config, _) = create_genesis_config(500);
-        activate_feature(&mut genesis_config, feature_set::epoch_accounts_hash::id());
         genesis_config.epoch_schedule = EpochSchedule::custom(400, 400, false);
         let bank0 = Arc::new(Bank::new_for_tests(&genesis_config));
         let eah_start_slot = epoch_accounts_hash_utils::calculation_start(&bank0);
diff --git a/runtime/src/bank_forks.rs b/runtime/src/bank_forks.rs
index dabd90e4c2c835..7e06375ec69fe9 100644
--- a/runtime/src/bank_forks.rs
+++ b/runtime/src/bank_forks.rs
@@ -14,7 +14,6 @@ use {
     solana_program_runtime::loaded_programs::{BlockRelation, ForkGraph},
     solana_sdk::{
         clock::{Epoch, Slot},
-        feature_set,
         hash::Hash,
         timing,
     },
@@ -678,13 +677,6 @@ impl BankForks {
     /// Determine if this bank should request an epoch accounts hash
     #[must_use]
     fn should_request_epoch_accounts_hash(&self, bank: &Bank) -> bool {
-        if !bank
-            .feature_set
-            .is_active(&feature_set::epoch_accounts_hash::id())
-        {
-            return false;
-        }
-
         if !epoch_accounts_hash_utils::is_enabled_this_epoch(bank) {
             return false;
         }