The getConfirmedBlock RPC API is now disabled by default

The --enable-rpc-get-confirmed-block flag allows validators to opt-in to
the higher disk usage and IOPS.

core/src/replay_stage.rs

@@ -78,7 +78,7 @@ pub struct ReplayStageConfig {
     pub snapshot_package_sender: Option<SnapshotPackageSender>,
     pub block_commitment_cache: Arc<RwLock<BlockCommitmentCache>>,
     pub transaction_status_sender: Option<TransactionStatusSender>,
-    pub rewards_sender: Option<RewardsRecorderSender>,
+    pub rewards_recorder_sender: Option<RewardsRecorderSender>,
 }
 
 pub struct ReplayStage {
@@ -181,7 +181,7 @@ impl ReplayStage {
             snapshot_package_sender,
             block_commitment_cache,
             transaction_status_sender,
-            rewards_sender,
+            rewards_recorder_sender,
         } = config;
 
         let (root_bank_sender, root_bank_receiver) = channel();
@@ -222,7 +222,7 @@ impl ReplayStage {
                         &bank_forks,
                         &leader_schedule_cache,
                         &subscriptions,
-                        rewards_sender.clone(),
+                        rewards_recorder_sender.clone(),
                     );
                     datapoint_debug!(
                         "replay_stage-memory",
@@ -399,7 +399,7 @@ impl ReplayStage {
                             &poh_recorder,
                             &leader_schedule_cache,
                             &subscriptions,
-                            rewards_sender.clone(),
+                            rewards_recorder_sender.clone(),
                         );
 
                         if let Some(bank) = poh_recorder.lock().unwrap().bank() {
@@ -473,7 +473,7 @@ impl ReplayStage {
         poh_recorder: &Arc<Mutex<PohRecorder>>,
         leader_schedule_cache: &Arc<LeaderScheduleCache>,
         subscriptions: &Arc<RpcSubscriptions>,
-        rewards_sender: Option<RewardsRecorderSender>,
+        rewards_recorder_sender: Option<RewardsRecorderSender>,
     ) {
         // all the individual calls to poh_recorder.lock() are designed to
         // increase granularity, decrease contention
@@ -539,7 +539,7 @@ impl ReplayStage {
                 .unwrap()
                 .insert(Bank::new_from_parent(&parent, my_pubkey, poh_slot));
 
-            Self::record_rewards(&tpu_bank, &rewards_sender);
+            Self::record_rewards(&tpu_bank, &rewards_recorder_sender);
             poh_recorder.lock().unwrap().set_bank(&tpu_bank);
         } else {
             error!("{} No next leader found", my_pubkey);
@@ -983,7 +983,7 @@ impl ReplayStage {
         forks_lock: &RwLock<BankForks>,
         leader_schedule_cache: &Arc<LeaderScheduleCache>,
         subscriptions: &Arc<RpcSubscriptions>,
-        rewards_sender: Option<RewardsRecorderSender>,
+        rewards_recorder_sender: Option<RewardsRecorderSender>,
     ) {
         // Find the next slot that chains to the old slot
         let forks = forks_lock.read().unwrap();
@@ -1021,7 +1021,7 @@ impl ReplayStage {
                 subscriptions.notify_slot(child_slot, parent_slot, forks.root());
 
                 let child_bank = Bank::new_from_parent(&parent_bank, &leader, child_slot);
-                Self::record_rewards(&child_bank, &rewards_sender);
+                Self::record_rewards(&child_bank, &rewards_recorder_sender);
                 new_banks.insert(child_slot, child_bank);
             }
         }
@@ -1033,12 +1033,12 @@ impl ReplayStage {
         }
     }
 
-    fn record_rewards(bank: &Bank, rewards_sender: &Option<RewardsRecorderSender>) {
-        if let Some(rewards_sender) = rewards_sender {
+    fn record_rewards(bank: &Bank, rewards_recorder_sender: &Option<RewardsRecorderSender>) {
+        if let Some(rewards_recorder_sender) = rewards_recorder_sender {
             if let Some(ref rewards) = bank.rewards {
-                rewards_sender
+                rewards_recorder_sender
                     .send((bank.slot(), rewards.iter().copied().collect()))
-                    .unwrap_or_else(|err| warn!("rewards_sender failed: {:?}", err));
+                    .unwrap_or_else(|err| warn!("rewards_recorder_sender failed: {:?}", err));
             }
         }
     }

core/src/rpc.rs

@@ -47,7 +47,8 @@ fn new_response<T>(bank: &Bank, value: T) -> RpcResponse<T> {
 
 #[derive(Debug, Default, Clone)]
 pub struct JsonRpcConfig {
-    pub enable_validator_exit: bool, // Enable the 'validatorExit' command
+    pub enable_validator_exit: bool,
+    pub enable_get_confirmed_block: bool,
     pub faucet_addr: Option<SocketAddr>,
 }
 
@@ -330,7 +331,11 @@ impl JsonRpcRequestProcessor {
         slot: Slot,
         encoding: Option<RpcTransactionEncoding>,
     ) -> Result<Option<RpcConfirmedBlock>> {
-        Ok(self.blockstore.get_confirmed_block(slot, encoding).ok())
+        if self.config.enable_get_confirmed_block {
+            Ok(self.blockstore.get_confirmed_block(slot, encoding).ok())
+        } else {
+            Ok(None)
+        }
     }
 
     pub fn get_confirmed_blocks(
@@ -1240,7 +1245,10 @@ pub mod tests {
         let _ = bank.process_transaction(&tx);
 
         let request_processor = Arc::new(RwLock::new(JsonRpcRequestProcessor::new(
-            JsonRpcConfig::default(),
+            JsonRpcConfig {
+                enable_get_confirmed_block: true,
+                ..JsonRpcConfig::default()
+            },
             bank_forks.clone(),
             block_commitment_cache.clone(),
             blockstore,

core/src/tvu.rs

@@ -87,7 +87,7 @@ impl Tvu {
         cfg: Option<Arc<AtomicBool>>,
         shred_version: u16,
         transaction_status_sender: Option<TransactionStatusSender>,
-        rewards_sender: Option<RewardsRecorderSender>,
+        rewards_recorder_sender: Option<RewardsRecorderSender>,
     ) -> Self {
         let keypair: Arc<Keypair> = cluster_info
             .read()
@@ -172,7 +172,7 @@ impl Tvu {
             snapshot_package_sender,
             block_commitment_cache,
             transaction_status_sender,
-            rewards_sender,
+            rewards_recorder_sender,
         };
 
         let (replay_stage, root_bank_receiver) = ReplayStage::new(

core/src/validator.rs

@@ -61,7 +61,6 @@ pub struct ValidatorConfig {
     pub expected_genesis_hash: Option<Hash>,
     pub expected_shred_version: Option<u16>,
     pub voting_disabled: bool,
-    pub transaction_status_service_disabled: bool,
     pub blockstream_unix_socket: Option<PathBuf>,
     pub storage_slots_per_turn: u64,
     pub account_paths: Vec<PathBuf>,
@@ -84,7 +83,6 @@ impl Default for ValidatorConfig {
             expected_genesis_hash: None,
             expected_shred_version: None,
             voting_disabled: false,
-            transaction_status_service_disabled: false,
             blockstream_unix_socket: None,
             storage_slots_per_turn: DEFAULT_SLOTS_PER_TURN,
             max_ledger_slots: None,
@@ -256,7 +254,7 @@ impl Validator {
         });
 
         let (transaction_status_sender, transaction_status_service) =
-            if rpc_service.is_some() && !config.transaction_status_service_disabled {
+            if rpc_service.is_some() && config.rpc_config.enable_get_confirmed_block {
                 let (transaction_status_sender, transaction_status_receiver) = unbounded();
                 (
                     Some(transaction_status_sender),
@@ -270,11 +268,11 @@ impl Validator {
                 (None, None)
             };
 
-        let (rewards_sender, rewards_recorder_service) =
-            if rpc_service.is_some() && !config.transaction_status_service_disabled {
-                let (rewards_sender, rewards_receiver) = unbounded();
+        let (rewards_recorder_sender, rewards_recorder_service) =
+            if rpc_service.is_some() && config.rpc_config.enable_get_confirmed_block {
+                let (rewards_recorder_sender, rewards_receiver) = unbounded();
                 (
-                    Some(rewards_sender),
+                    Some(rewards_recorder_sender),
                     Some(RewardsRecorderService::new(
                         rewards_receiver,
                         blockstore.clone(),
@@ -405,7 +403,7 @@ impl Validator {
             config.enable_partition.clone(),
             node.info.shred_version,
             transaction_status_sender.clone(),
-            rewards_sender,
+            rewards_recorder_sender,
         );
 
         if config.dev_sigverify_disabled {
@@ -647,7 +645,6 @@ pub fn new_validator_for_tests_ex(
     let leader_voting_keypair = Arc::new(voting_keypair);
     let storage_keypair = Arc::new(Keypair::new());
     let config = ValidatorConfig {
-        transaction_status_service_disabled: true,
         rpc_ports: Some((node.info.rpc.port(), node.info.rpc_pubsub.port())),
         ..ValidatorConfig::default()
     };
@@ -748,7 +745,6 @@ mod tests {
         let voting_keypair = Arc::new(Keypair::new());
         let storage_keypair = Arc::new(Keypair::new());
         let config = ValidatorConfig {
-            transaction_status_service_disabled: true,
             rpc_ports: Some((
                 validator_node.info.rpc.port(),
                 validator_node.info.rpc_pubsub.port(),
@@ -788,7 +784,6 @@ mod tests {
                 let voting_keypair = Arc::new(Keypair::new());
                 let storage_keypair = Arc::new(Keypair::new());
                 let config = ValidatorConfig {
-                    transaction_status_service_disabled: true,
                     rpc_ports: Some((
                         validator_node.info.rpc.port(),
                         validator_node.info.rpc_pubsub.port(),

local-cluster/src/local_cluster.rs

@@ -211,7 +211,6 @@ impl LocalCluster {
             leader_node.info.rpc.port(),
             leader_node.info.rpc_pubsub.port(),
         ));
-        leader_config.transaction_status_service_disabled = true;
         let leader_server = Validator::new(
             leader_node,
             &leader_keypair,
@@ -359,7 +358,6 @@ impl LocalCluster {
             validator_node.info.rpc.port(),
             validator_node.info.rpc_pubsub.port(),
         ));
-        config.transaction_status_service_disabled = true;
         let voting_keypair = Arc::new(voting_keypair);
         let validator_server = Validator::new(
             validator_node,
@@ -668,9 +666,6 @@ impl Cluster for LocalCluster {
         cluster_validator_info.info.contact_info = node.info.clone();
         cluster_validator_info.config.rpc_ports =
             Some((node.info.rpc.port(), node.info.rpc_pubsub.port()));
-        cluster_validator_info
-            .config
-            .transaction_status_service_disabled = true;
 
         let entry_point_info = {
             if *pubkey == self.entry_point_info.id {

net/remote/remote-node.sh

@@ -285,6 +285,7 @@ EOF
         --blockstream /tmp/solana-blockstream.sock
         --no-voting
         --dev-no-sigverify
+        --enable-rpc-get-confirmed-block
       )
     else
       args+=(--enable-rpc-exit)

run.sh

@@ -112,6 +112,7 @@ args=(
   --rpc-faucet-address 127.0.0.1:9900
   --log -
   --enable-rpc-exit
+  --enable-rpc-get-confirmed-block
   --init-complete-file "$dataDir"/init-completed
 )
 if [[ -n $blockstreamSocket ]]; then

validator/src/main.rs

@@ -507,6 +507,12 @@ pub fn main() {
                 .takes_value(false)
                 .help("Enable the JSON RPC 'validatorExit' API.  Only enable in a debug environment"),
         )
+        .arg(
+            Arg::with_name("enable_rpc_get_confirmed_block")
+                .long("enable-rpc-get-confirmed-block")
+                .takes_value(false)
+                .help("Enable the JSON RPC 'getConfirmedBlock' API.  This will cause an increase in disk usage and IOPS"),
+        )
         .arg(
             Arg::with_name("rpc_faucet_addr")
                 .long("rpc-faucet-address")
@@ -684,6 +690,7 @@ pub fn main() {
         new_hard_forks: hardforks_of(&matches, "hard_forks"),
         rpc_config: JsonRpcConfig {
             enable_validator_exit: matches.is_present("enable_rpc_exit"),
+            enable_get_confirmed_block: matches.is_present("enable_rpc_get_confirmed_block"),
             faucet_addr: matches.value_of("rpc_faucet_addr").map(|address| {
                 solana_net_utils::parse_host_port(address).expect("failed to parse faucet address")
             }),