Rpc: enable getConfirmedBlock and getConfirmedTransaction to return confirmed (not yet finalized) data (bp #16142) (#16160)

* Rpc: enable getConfirmedBlock and getConfirmedTransaction to return confirmed (not yet finalized) data (#16142)

* Add Blockstore block and tx apis that allow unrooted responses

* Add TransactionStatusMessage, and send on bank freeze; also refactor TransactionStatusSender

* Track highest slot with tx-status writes complete

* Rename and unpub fn

* Add commitment to GetConfirmed input configs

* Support confirmed blocks in getConfirmedBlock

* Support confirmed txs in getConfirmedTransaction

* Update sigs-for-addr2 comment

* Enable confirmed block in cli

* Enable confirmed transaction in cli

* Review comments

* Rename blockstore method

(cherry picked from commit 433f1ead1c)

# Conflicts:
#	core/src/replay_stage.rs

* Fix conflict

Co-authored-by: Tyera Eulberg <teulberg@gmail.com>
Co-authored-by: Tyera Eulberg <tyera@solana.com>

core/src/validator.rs

@@ -70,7 +70,7 @@ use std::{
     net::SocketAddr,
     ops::Deref,
     path::{Path, PathBuf},
-    sync::atomic::{AtomicBool, Ordering},
+    sync::atomic::{AtomicBool, AtomicU64, Ordering},
     sync::mpsc::Receiver,
     sync::{Arc, Mutex, RwLock},
     thread::sleep,
@@ -249,6 +249,7 @@ impl fmt::Debug for ValidatorExit {
 struct TransactionHistoryServices {
     transaction_status_sender: Option<TransactionStatusSender>,
     transaction_status_service: Option<TransactionStatusService>,
+    max_complete_transaction_status_slot: Arc<AtomicU64>,
     rewards_recorder_sender: Option<RewardsRecorderSender>,
     rewards_recorder_service: Option<RewardsRecorderService>,
     cache_block_time_sender: Option<CacheBlockTimeSender>,
@@ -384,6 +385,7 @@ impl Validator {
             TransactionHistoryServices {
                 transaction_status_sender,
                 transaction_status_service,
+                max_complete_transaction_status_slot,
                 rewards_recorder_sender,
                 rewards_recorder_service,
                 cache_block_time_sender,
@@ -544,6 +546,7 @@ impl Validator {
                     config.send_transaction_leader_forward_count,
                     max_slots.clone(),
                     leader_schedule_cache.clone(),
+                    max_complete_transaction_status_slot,
                 )),
                 if config.rpc_config.minimal_api {
                     None
@@ -1259,6 +1262,7 @@ fn initialize_rpc_transaction_history_services(
     exit: &Arc<AtomicBool>,
     enable_cpi_and_log_storage: bool,
 ) -> TransactionHistoryServices {
+    let max_complete_transaction_status_slot = Arc::new(AtomicU64::new(blockstore.max_root()));
     let (transaction_status_sender, transaction_status_receiver) = unbounded();
     let transaction_status_sender = Some(TransactionStatusSender {
         sender: transaction_status_sender,
@@ -1266,6 +1270,7 @@ fn initialize_rpc_transaction_history_services(
     });
     let transaction_status_service = Some(TransactionStatusService::new(
         transaction_status_receiver,
+        max_complete_transaction_status_slot.clone(),
         blockstore.clone(),
         exit,
     ));
@@ -1288,6 +1293,7 @@ fn initialize_rpc_transaction_history_services(
     TransactionHistoryServices {
         transaction_status_sender,
         transaction_status_service,
+        max_complete_transaction_status_slot,
         rewards_recorder_sender,
         rewards_recorder_service,
         cache_block_time_sender,