chore: release v3.5.2

- Bump version to 3.5.2 in Cargo.toml
- Update README and README_CN with 3.5.2 and What's new in 3.5.2

Made-with: Cursor

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "3.5.0"
+version = "3.5.2"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",
@@ -19,8 +19,6 @@ members = [
     "examples/trading_client",
     "examples/shared_infrastructure",
     "examples/middleware_system",
-    "examples/pumpfun_copy_trading",
-    "examples/pumpfun_sniper_trading",
     "examples/pumpswap_trading",
     "examples/bonk_sniper_trading",
     "examples/bonk_copy_trading",

README.md

@@ -60,6 +60,16 @@
 
 ---
 
+## 🆕 What's new in 3.5.2
+
+- **SWQoS submit latency**: Sync serialize + buffer-pool hot path; `format!` body for single/batch submit (Bloxroute); avoid status clone in confirmation polling.
+- **First-submit & 5-min idle**: Immediate first ping + 30s keepalive; `pool_max_idle_per_host=4` and `pool_idle_timeout=300s` (BlockRazor, Temporal, Node1, Astralane, Stellium) so submit reuses the same connection; ping consumes response body for connection reuse.
+- **Docs**: All SWQoS comments translated to English.
+
+## 🆕 What's new in 3.5.1
+
+- **SWQoS / executor**: Updates to common SWQoS logic and trading executor.
+
 ## 🆕 What's new in 3.5.0
 
 - **Performance**: Hot-path timing only when logging; reduced clones (`execute_parallel` takes `&[Arc<SwqosClient>]`); shared HTTP client constants for SWQoS.
@@ -97,14 +107,14 @@ Add the dependency to your `Cargo.toml`:
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.0" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.2" }
 ```
 
 ### Use crates.io
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = "3.5.0"
+sol-trade-sdk = "3.5.2"
 ```
 
 ## 🛠️ Usage Examples

README_CN.md

@@ -97,7 +97,7 @@ git clone https://github.com/0xfnzero/sol-trade-sdk
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.0" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.5.2" }
 ```
 
 ### 使用 crates.io

src/swqos/common.rs

@@ -89,41 +89,64 @@ pub async fn poll_transaction_confirmation(
     txt_sig: Signature,
     wait_confirmation: bool,
 ) -> Result<Signature> {
-    // If no confirmation needed, return signature immediately
+    poll_any_transaction_confirmation(rpc, &[txt_sig], wait_confirmation).await
+}
+
+/// Poll multiple signatures in parallel (one RPC call per poll) and return the first one that confirms.
+/// When transactions are submitted to multiple SWQOS channels, each channel produces a different
+/// signature. Only one will land on-chain, so we must check all of them.
+pub async fn poll_any_transaction_confirmation(
+    rpc: &SolanaRpcClient,
+    signatures: &[Signature],
+    wait_confirmation: bool,
+) -> Result<Signature> {
+    if signatures.is_empty() {
+        return Err(anyhow::anyhow!("No signatures to confirm"));
+    }
+    // If no confirmation needed, return first signature immediately
     if !wait_confirmation {
-        return Ok(txt_sig);
+        return Ok(signatures[0]);
     }
 
-    let timeout: Duration = Duration::from_secs(15); // 15s to avoid timeout under network congestion
+    let timeout: Duration = Duration::from_secs(15);
     let interval: Duration = Duration::from_millis(1000);
     let start: Instant = Instant::now();
     let mut poll_count = 0u32;
+    // Track which signature landed (confirmed or failed on-chain)
+    let mut landed_sig: Option<Signature> = None;
 
     loop {
         if start.elapsed() >= timeout {
-            return Err(anyhow::anyhow!("Transaction {}'s confirmation timed out", txt_sig));
+            return Err(anyhow::anyhow!("Transaction confirmation timed out after {}s ({} signatures polled)", timeout.as_secs(), signatures.len()));
         }
 
         poll_count += 1;
 
-        let status = rpc.get_signature_statuses(&[txt_sig]).await?;
+        let status = rpc.get_signature_statuses(signatures).await?;
-        let first = status.value.get(0).and_then(|o| o.as_ref());
+        // Check all signatures for any that confirmed successfully
-        match first {
+        for (i, maybe_status) in status.value.iter().enumerate() {
-            Some(s) => {
+            if let Some(s) = maybe_status {
                 if s.err.is_none()
                     && (s.confirmation_status == Some(TransactionConfirmationStatus::Confirmed)
                         || s.confirmation_status == Some(TransactionConfirmationStatus::Finalized))
                 {
-                    return Ok(txt_sig);
+                    return Ok(signatures[i]);
+                }
+                // Track the first signature that landed on-chain (even if errored)
+                if landed_sig.is_none() {
+                    landed_sig = Some(signatures[i]);
                 }
-            }
-            None => {
-                sleep(interval).await;
-                continue;
             }
         }
 
-        let should_get_transaction = first.map(|s| s.err.is_some()).unwrap_or(false) || poll_count >= 10;
+        // If no signature has any status yet, keep waiting
+        if landed_sig.is_none() {
+            sleep(interval).await;
+            continue;
+        }
+
+        let landed = landed_sig.unwrap();
+        let should_get_transaction = poll_count >= 10;
 
         if !should_get_transaction {
             sleep(interval).await;
@@ -132,7 +155,7 @@ pub async fn poll_transaction_confirmation(
 
         let tx_details = match rpc
             .get_transaction_with_config(
-                &txt_sig,
+                &landed,
                 RpcTransactionConfig {
                     encoding: Some(UiTransactionEncoding::JsonParsed),
                     max_supported_transaction_version: Some(0),
@@ -155,7 +178,7 @@ pub async fn poll_transaction_confirmation(
         } else {
             let meta = meta.unwrap();
             if meta.err.is_none() {
-                return Ok(txt_sig);
+                return Ok(landed);
             } else {
                 // Extract error message from log_messages
                 let mut error_msg = String::new();

src/trading/core/executor.rs

@@ -11,7 +11,7 @@ use tracing::{info, trace, warn};
 use crate::{
     common::{nonce_cache::DurableNonceInfo, GasFeeStrategy, SolanaRpcClient},
     perf::syscall_bypass::SystemCallBypassManager,
-    swqos::common::poll_transaction_confirmation,
+    swqos::common::poll_any_transaction_confirmation,
     trading::core::{
         async_executor::execute_parallel,
         execution::{InstructionProcessor, Prefetch},
@@ -156,10 +156,12 @@ impl TradeExecutor for GenericTradeExecutor {
                 ),
                 Err(e) => (false, vec![], Some(anyhow::anyhow!("{}", e))),
             };
-            let first_sig = sigs.first().copied();
+            let confirm_result = if let Some(rpc) = params.rpc.as_ref() {
-            let confirm_result = if let (Some(rpc), Some(sig)) = (params.rpc.as_ref(), first_sig) {
+                if sigs.is_empty() {
+                    (ok, sigs, err)
+                } else {
                 let confirm_start = (params.log_enabled && crate::common::sdk_log::sdk_log_enabled()).then(Instant::now);
-                let poll_res = poll_transaction_confirmation(rpc, sig, true).await;
+                let poll_res = poll_any_transaction_confirmation(rpc, &sigs, true).await;
                 let confirm_elapsed = confirm_start.map(|s| s.elapsed()).unwrap_or(Duration::ZERO);
                 if params.log_enabled && crate::common::sdk_log::sdk_log_enabled() {
                     let dir = if is_buy { "Buy" } else { "Sell" };
@@ -171,6 +173,7 @@ impl TradeExecutor for GenericTradeExecutor {
                     Ok(_) => (true, sigs, None),
                     Err(e) => (false, sigs, Some(e)),
                 }
+                }
             } else {
                 (ok, sigs, err)
             };