Nonce accounts must be writeable (#21260)

* Nonce accounts must be writeable

* feedback

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rpc/src/rpc.rs

@@ -56,7 +56,7 @@ use {
         epoch_info::EpochInfo,
         epoch_schedule::EpochSchedule,
         exit::Exit,
-        feature_set,
+        feature_set::{self, nonce_must_be_writable},
         fee_calculator::FeeCalculator,
         hash::Hash,
         message::{Message, SanitizedMessage},
@@ -3396,7 +3396,11 @@ pub mod rpc_full {
                 .unwrap_or(0);
 
             let durable_nonce_info = transaction
-                .get_durable_nonce()
+                .get_durable_nonce(
+                    preflight_bank
+                        .feature_set
+                        .is_active(&nonce_must_be_writable::id()),
+                )
                 .map(|&pubkey| (pubkey, *transaction.message().recent_blockhash()));
             if durable_nonce_info.is_some() {
                 // While it uses a defined constant, this last_valid_block_height value is chosen arbitrarily.