RPC simulateTransaction endpoint now returns program log output (#10432)

client/src/rpc_client.rs

@@ -129,7 +129,7 @@ impl RpcClient {
         &self,
         transaction: &Transaction,
         sig_verify: bool,
-    ) -> RpcResult<TransactionStatus> {
+    ) -> RpcResult<RpcSimulateTransactionResult> {
         let serialized_encoded = bs58::encode(serialize(transaction).unwrap()).into_string();
         self.send(
             RpcRequest::SimulateTransaction,

client/src/rpc_response.rs

@@ -211,6 +211,13 @@ pub struct RpcSignatureConfirmation {
     pub status: Result<()>,
 }
 
+#[derive(Serialize, Deserialize, Clone, Debug)]
+#[serde(rename_all = "camelCase")]
+pub struct RpcSimulateTransactionResult {
+    pub err: Option<TransactionError>,
+    pub logs: Option<Vec<String>>,
+}
+
 #[derive(Serialize, Deserialize, Clone, Debug)]
 #[serde(rename_all = "camelCase")]
 pub struct RpcStorageTurn {