refactor: simplify trading parameters API and nonce handling

- Change recent_blockhash from required to optional parameter
- Replace separate nonce_account and current_nonce with unified durable_nonce
- Update all examples and documentation to reflect API changes
- Improve nonce cache usage pattern for better developer experience

BREAKING CHANGE: TradeBuyParams and TradeSellParams API has changed
- recent_blockhash is now Option<Hash> instead of Hash
- nonce_account and current_nonce fields replaced with durable_nonce: Option<DurableNonceInfo>

docs/ADDRESS_LOOKUP_TABLE.md

@@ -52,7 +52,7 @@ let buy_params = sol_trade_sdk::TradeBuyParams {
     mint: mint_pubkey,
     sol_amount: buy_sol_amount,
     slippage_basis_points: Some(100),
-    recent_blockhash: recent_blockhash,
+    recent_blockhash: Some(recent_blockhash),
     extension_params: Box::new(PumpFunParams::from_trade(&trade_info, None)),
     lookup_table_key: Some(lookup_table_key), // Include lookup table
     wait_transaction_confirmed: true,

docs/ADDRESS_LOOKUP_TABLE_CN.md

@@ -52,7 +52,7 @@ let buy_params = sol_trade_sdk::TradeBuyParams {
     mint: mint_pubkey,
     sol_amount: buy_sol_amount,
     slippage_basis_points: Some(100),
-    recent_blockhash: recent_blockhash,
+    recent_blockhash: Some(recent_blockhash),
     extension_params: Box::new(PumpFunParams::from_trade(&trade_info, None)),
     lookup_table_key: Some(lookup_table_key), // 包含查找表
     wait_transaction_confirmed: true,

docs/NONCE_CACHE.md

@@ -42,15 +42,12 @@ Get the latest nonce information from RPC:
 NonceCache::get_instance().fetch_nonce_info_use_rpc(&client.rpc).await?;
 // Or manually manage nonce
 // NonceCache::get_instance().update_nonce_info_partial(nonce_account, current_nonce, used);
-let nonce_info = NonceCache::get_instance().get_nonce_info();
-let current_nonce = nonce_info.current_nonce;
-let nonce_account = nonce_info.nonce_account;
-println!("Current nonce: {}", current_nonce);
+let durable_nonce = NonceCache::get_durable_nonce_info();
 ```
 
 ### 3. Use Nonce in Transactions
 
-Set nonce parameters: nonce_account and current_nonce
+Set nonce parameters: durable_nonce
 
 ```rust
 let buy_params = sol_trade_sdk::TradeBuyParams {
@@ -58,7 +55,7 @@ let buy_params = sol_trade_sdk::TradeBuyParams {
     mint: mint_pubkey,
     sol_amount: buy_sol_amount,
     slippage_basis_points: Some(100),
-    recent_blockhash: recent_blockhash,
+    recent_blockhash: Some(recent_blockhash),
     extension_params: Box::new(PumpFunParams::from_trade(&trade_info, None)),
     lookup_table_key: None,
     wait_transaction_confirmed: true,
@@ -66,8 +63,7 @@ let buy_params = sol_trade_sdk::TradeBuyParams {
     close_wsol_ata: false,
     create_mint_ata: true,
     open_seed_optimize: false,
-    nonce_account: nonce_account, // Set nonce account
-    current_nonce: Some(current_nonce), // Set nonce value
+    durable_nonce: Some(durable_nonce), // Set durable nonce
 };
 
 // Execute transaction

docs/NONCE_CACHE_CN.md

@@ -42,15 +42,12 @@ NonceCache::get_instance().init(Some(nonce_account_str.to_string()));
 NonceCache::get_instance().fetch_nonce_info_use_rpc(&client.rpc).await?;
 // 或者手动管理nonce
 // NonceCache::get_instance().update_nonce_info_partial(nonce_account, current_nonce, used);
-let nonce_info = NonceCache::get_instance().get_nonce_info();
-let current_nonce = nonce_info.current_nonce;
-let nonce_account = nonce_info.nonce_account;
-println!("Current nonce: {}", current_nonce);
+let durable_nonce = NonceCache::get_durable_nonce_info();
 ```
 
 ### 3. 在交易中使用 Nonce
 
-设置 nonce 参数：nonce_account 和 recent_nonce
+设置 nonce 参数：durable_nonce
 
 ```rust
 let buy_params = sol_trade_sdk::TradeBuyParams {
@@ -58,7 +55,7 @@ let buy_params = sol_trade_sdk::TradeBuyParams {
     mint: mint_pubkey,
     sol_amount: buy_sol_amount,
     slippage_basis_points: Some(100),
-    recent_blockhash: recent_blockhash,
+    recent_blockhash: Some(recent_blockhash),
     extension_params: Box::new(PumpFunParams::from_trade(&trade_info, None)),
     lookup_table_key: None,
     wait_transaction_confirmed: true,
@@ -66,8 +63,7 @@ let buy_params = sol_trade_sdk::TradeBuyParams {
     close_wsol_ata: false,
     create_mint_ata: true,
     open_seed_optimize: false,
-    nonce_account: nonce_account, // 设置 nonce 账户
-    current_nonce: Some(current_nonce), // 设置 nonce 值
+    durable_nonce: Some(durable_nonce), // 设置 durable nonce
 };
 
 // 执行交易

docs/TRADING_PARAMETERS.md

@@ -21,7 +21,7 @@ The `TradeBuyParams` struct contains all parameters required for executing buy o
 | `mint` | `Pubkey` | ✅ | The public key of the token mint to purchase |
 | `sol_amount` | `u64` | ✅ | Amount of SOL to spend (in lamports) |
 | `slippage_basis_points` | `Option<u64>` | ❌ | Slippage tolerance in basis points (e.g., 100 = 1%, 500 = 5%) |
-| `recent_blockhash` | `Hash` | ✅ | Recent blockhash for transaction validity |
+| `recent_blockhash` | `Option<Hash>` | ❌ | Recent blockhash for transaction validity |
 | `extension_params` | `Box<dyn ProtocolParams>` | ✅ | Protocol-specific parameters (PumpFunParams, PumpSwapParams, etc.) |
 
 ### Advanced Configuration Parameters
@@ -34,8 +34,7 @@ The `TradeBuyParams` struct contains all parameters required for executing buy o
 | `close_wsol_ata` | `bool` | ✅ | Whether to close wSOL ATA after transaction |
 | `create_mint_ata` | `bool` | ✅ | Whether to create token mint ATA |
 | `open_seed_optimize` | `bool` | ✅ | Whether to use seed optimization for reduced CU consumption |
-| `nonce_account` | `Option<Pubkey>` | ❌ | nonce account |
-| `current_nonce` | `Option<u64>` | ❌ | nonce value |
+| `durable_nonce` | `Option<DurableNonceInfo>` | ❌ | Durable nonce information containing nonce account and current nonce value |
 
 
 ## TradeSellParams
@@ -50,7 +49,7 @@ The `TradeSellParams` struct contains all parameters required for executing sell
 | `mint` | `Pubkey` | ✅ | The public key of the token mint to sell |
 | `token_amount` | `u64` | ✅ | Amount of tokens to sell (in smallest token units) |
 | `slippage_basis_points` | `Option<u64>` | ❌ | Slippage tolerance in basis points (e.g., 100 = 1%, 500 = 5%) |
-| `recent_blockhash` | `Hash` | ✅ | Recent blockhash for transaction validity |
+| `recent_blockhash` | `Option<Hash>` | ❌ | Recent blockhash for transaction validity |
 | `with_tip` | `bool` | ✅ | Whether to include tip in the transaction |
 | `extension_params` | `Box<dyn ProtocolParams>` | ✅ | Protocol-specific parameters (PumpFunParams, PumpSwapParams, etc.) |
 
@@ -63,8 +62,7 @@ The `TradeSellParams` struct contains all parameters required for executing sell
 | `create_wsol_ata` | `bool` | ✅ | Whether to create wSOL Associated Token Account |
 | `close_wsol_ata` | `bool` | ✅ | Whether to close wSOL ATA after transaction |
 | `open_seed_optimize` | `bool` | ✅ | Whether to use seed optimization for reduced CU consumption |
-| `nonce_account` | `Option<Pubkey>` | ❌ | nonce account |
-| `current_nonce` | `Option<u64>` | ❌ | nonce value |
+| `durable_nonce` | `Option<DurableNonceInfo>` | ❌ | Durable nonce information containing nonce account and current nonce value |
 
 
 ## Parameter Categories
@@ -102,9 +100,8 @@ These parameters enable advanced optimizations:
 
 ### 🔄 Optional Parameters
 
-When you need to use durable nonce, you need to fill in these two parameters:
-- **nonce_account**: nonce account
-- **current_nonce**: nonce value
+When you need to use durable nonce, you need to fill in this parameter:
+- **durable_nonce**: Durable nonce information containing nonce account and current nonce value
 
 ## Important Notes
 

docs/TRADING_PARAMETERS_CN.md

@@ -21,7 +21,7 @@
 | `mint` | `Pubkey` | ✅ | 要购买的代币 mint 公钥 |
 | `sol_amount` | `u64` | ✅ | 要花费的 SOL 数量（以 lamports 为单位） |
 | `slippage_basis_points` | `Option<u64>` | ❌ | 滑点容忍度（基点单位，例如 100 = 1%, 500 = 5%） |
-| `recent_blockhash` | `Hash` | ✅ | 用于交易有效性的最新区块哈希 |
+| `recent_blockhash` | `Option<Hash>` | ❌ | 用于交易有效性的最新区块哈希 |
 | `extension_params` | `Box<dyn ProtocolParams>` | ✅ | 协议特定参数 (PumpFunParams, PumpSwapParams 等) |
 
 ### 高级配置参数
@@ -34,8 +34,7 @@
 | `close_wsol_ata` | `bool` | ✅ | 交易后是否关闭 wSOL ATA |
 | `create_mint_ata` | `bool` | ✅ | 是否创建代币 mint ATA |
 | `open_seed_optimize` | `bool` | ✅ | 是否使用 seed 优化以减少 CU 消耗 |
-| `nonce_account` | `Option<Pubkey>` | ❌ | nonce 账户 |
-| `current_nonce` | `Option<u64>` | ❌ | nonce 值 |
+| `durable_nonce` | `Option<DurableNonceInfo>` | ❌ | 持久 nonce 信息，包含 nonce 账户和当前 nonce 值 |
 
 
 ## TradeSellParams
@@ -50,7 +49,7 @@
 | `mint` | `Pubkey` | ✅ | 要出售的代币 mint 公钥 |
 | `token_amount` | `u64` | ✅ | 要出售的代币数量（最小代币单位） |
 | `slippage_basis_points` | `Option<u64>` | ❌ | 滑点容忍度（基点单位，例如 100 = 1%, 500 = 5%） |
-| `recent_blockhash` | `Hash` | ✅ | 用于交易有效性的最新区块哈希 |
+| `recent_blockhash` | `Option<Hash>` | ❌ | 用于交易有效性的最新区块哈希 |
 | `with_tip` | `bool` | ✅ | 交易中是否包含小费 |
 | `extension_params` | `Box<dyn ProtocolParams>` | ✅ | 协议特定参数 (PumpFunParams, PumpSwapParams 等) |
 
@@ -63,8 +62,7 @@
 | `create_wsol_ata` | `bool` | ✅ | 是否创建 wSOL 关联代币账户 |
 | `close_wsol_ata` | `bool` | ✅ | 交易后是否关闭 wSOL ATA |
 | `open_seed_optimize` | `bool` | ✅ | 是否使用 seed 优化以减少 CU 消耗 |
-| `nonce_account` | `Option<Pubkey>` | ❌ | nonce 账户 |
-| `current_nonce` | `Option<u64>` | ❌ | nonce 值 |
+| `durable_nonce` | `Option<DurableNonceInfo>` | ❌ | 持久 nonce 信息，包含 nonce 账户和当前 nonce 值 |
 
 
 ## 参数分类
@@ -102,9 +100,8 @@
 
 ### 🔄 非必填参数
 
-当你需要使用 durable nonce 时，需要填入这两个参数：
-- **nonce_account**: nonce 账户
-- **current_nonce**: nonce 值
+当你需要使用 durable nonce 时，需要填入这个参数：
+- **durable_nonce**: 持久 nonce 信息，包含 nonce 账户和当前 nonce 值
 
 ## 重要说明