rename flag

client/src/rpc_config.rs

@@ -29,7 +29,7 @@ pub struct RpcSimulateTransactionConfig {
     #[serde(default)]
     pub sig_verify: bool,
     #[serde(default)]
-    pub use_most_recent_blockhash: bool,
+    pub replace_recent_blockhash: bool,
     #[serde(flatten)]
     pub commitment: Option<CommitmentConfig>,
     pub encoding: Option<UiTransactionEncoding>,

core/src/rpc.rs

@@ -2978,7 +2978,7 @@ pub mod rpc_full {
             }
 
             let bank = &*meta.bank(config.commitment);
-            if config.use_most_recent_blockhash {
+            if config.replace_recent_blockhash {
                 transaction.message.recent_blockhash = bank.last_blockhash();
             }
             let (result, logs) = bank.simulate_transaction(transaction);

docs/src/developing/clients/jsonrpc-api.md

@@ -3206,7 +3206,7 @@ Simulate sending a transaction
   - `sigVerify: <bool>` - if true the transaction signatures will be verified (default: false)
   - `commitment: <string>` - (optional) [Commitment](jsonrpc-api.md#configuring-state-commitment) level to simulate the transaction at (default: `"finalized"`).
   - `encoding: <string>` - (optional) Encoding used for the transaction data. Either `"base58"` (*slow*, **DEPRECATED**), or `"base64"`. (default: `"base58"`).
-  - `useMostRecentBlockhash: <bool>` - (optional) if true the transaction recent blockhash will be ignored and overridden with the most recent blockhash. (default: false)
+  - `replaceRecentBlockhash: <bool>` - (optional) if true the transaction recent blockhash will be replaced with the most recent blockhash. (default: false)
 
 #### Results: