feat: upgrade to v0.6.6 with improved tip transfer logic

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "0.6.5"
+version = "0.6.6"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",

README.md

@@ -89,14 +89,14 @@ Add the dependency to your `Cargo.toml`:
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "0.6.5" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "0.6.6" }
 ```
 
 ### Use crates.io
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = "0.6.5"
+sol-trade-sdk = "0.6.6"
 ```
 
 ## 🛠️ Usage Examples

README_CN.md

@@ -89,14 +89,14 @@ 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 = "0.6.5" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "0.6.6" }
 ```
 
 ### 使用 crates.io
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = "0.6.5"
+sol-trade-sdk = "0.6.6"
 ```
 
 ## 🛠️ 使用示例

src/trading/common/transaction_builder.rs

@@ -54,7 +54,7 @@ pub async fn build_transaction(
     instructions.extend(business_instructions);
 
     // Add tip transfer instruction
-    if with_tip {
+    if with_tip && tip_amount > 0.0 {
         instructions.push(transfer(
             &payer.pubkey(),
             tip_account,

src/trading/core/parallel.rs

@@ -110,7 +110,7 @@ async fn parallel_execute(
 
             let tip_account_str = swqos_client.get_tip_account()?;
             let tip_account = Arc::new(Pubkey::from_str(&tip_account_str).unwrap_or_default());
-            let tip_amount = priority_fee.buy_tip_fees[i];
+            let tip_amount = if with_tip { priority_fee.buy_tip_fees[i] } else { 0.0 };
 
             let transaction = build_transaction(
                 payer,