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

client/src/rpc_client.rs

@@ -4,9 +4,10 @@ use crate::{
     mock_sender::{MockSender, Mocks},
     rpc_config::RpcAccountInfoConfig,
     rpc_config::{
-        RpcConfirmedBlockConfig, RpcGetConfirmedSignaturesForAddress2Config,
-        RpcLargestAccountsConfig, RpcProgramAccountsConfig, RpcSendTransactionConfig,
-        RpcSimulateTransactionConfig, RpcTokenAccountsFilter,
+        RpcConfirmedBlockConfig, RpcConfirmedTransactionConfig,
+        RpcGetConfirmedSignaturesForAddress2Config, RpcLargestAccountsConfig,
+        RpcProgramAccountsConfig, RpcSendTransactionConfig, RpcSimulateTransactionConfig,
+        RpcTokenAccountsFilter,
     },
     rpc_request::{RpcError, RpcRequest, RpcResponseErrorData, TokenAccountsFilter},
     rpc_response::*,
@@ -527,7 +528,7 @@ impl RpcClient {
         self.send(RpcRequest::GetConfirmedBlock, json!([slot, encoding]))
     }
 
-    pub fn get_configured_confirmed_block(
+    pub fn get_confirmed_block_with_config(
         &self,
         slot: Slot,
         config: RpcConfirmedBlockConfig,
@@ -619,6 +620,17 @@ impl RpcClient {
         )
     }
 
+    pub fn get_confirmed_transaction_with_config(
+        &self,
+        signature: &Signature,
+        config: RpcConfirmedTransactionConfig,
+    ) -> ClientResult<EncodedConfirmedTransaction> {
+        self.send(
+            RpcRequest::GetConfirmedTransaction,
+            json!([signature.to_string(), config]),
+        )
+    }
+
     pub fn get_block_time(&self, slot: Slot) -> ClientResult<UnixTimestamp> {
         let request = RpcRequest::GetBlockTime;
         let response = self.sender.send(request, json!([slot]));