refactor: Major SDK architecture refactoring and API consolidation

- Consolidate separate buy/sell modules into unified trading interface
- Remove protocol-specific buy/sell files (bonk, pumpfun, pumpswap)
- Add new trading constants and utility functions
- Simplify API with unified buy/sell methods supporting multiple protocols
- Enhance documentation with comprehensive examples and usage guides
- Add balance checking and token account management utilities
- Improve code organization and maintainability

src/trading/core/executor.rs

@@ -1,5 +1,4 @@
 use anyhow::{anyhow, Result};
-use solana_sdk::signer::Signer;
 use std::sync::Arc;
 
 use super::{
@@ -13,6 +12,8 @@ use crate::{
     trading::common::{build_rpc_transaction, build_sell_transaction},
 };
 
+const MAX_LOADED_ACCOUNTS_DATA_SIZE_LIMIT: u32 = 256 * 1024;
+
 /// 通用交易执行器实现
 pub struct GenericTradeExecutor {
     instruction_builder: Arc<dyn InstructionBuilder>,
@@ -29,26 +30,14 @@ impl GenericTradeExecutor {
             protocol_name,
         }
     }
-
-    /// 获取代币余额
-    async fn get_token_balance(
-        &self,
-        rpc: Arc<crate::common::SolanaRpcClient>,
-        payer: &solana_sdk::signature::Keypair,
-        mint: &solana_sdk::pubkey::Pubkey,
-    ) -> Result<u64> {
-        let ata = spl_associated_token_account::get_associated_token_address(&payer.pubkey(), mint);
-        let balance = rpc.get_token_account_balance(&ata).await?;
-        balance
-            .amount
-            .parse::<u64>()
-            .map_err(|_| anyhow!("Failed to parse token balance"))
-    }
 }
 
 #[async_trait::async_trait]
 impl TradeExecutor for GenericTradeExecutor {
-    async fn buy(&self, params: BuyParams) -> Result<()> {
+    async fn buy(&self, mut params: BuyParams) -> Result<()> {
+        if params.data_size_limit == 0 {
+            params.data_size_limit = MAX_LOADED_ACCOUNTS_DATA_SIZE_LIMIT;
+        }
         if params.rpc.is_none() {
             return Err(anyhow!("RPC is not set"));
         }
@@ -80,7 +69,10 @@ impl TradeExecutor for GenericTradeExecutor {
         Ok(())
     }
 
-    async fn buy_with_tip(&self, params: BuyWithTipParams) -> Result<()> {
+    async fn buy_with_tip(&self, mut params: BuyWithTipParams) -> Result<()> {
+        if params.data_size_limit == 0 {
+            params.data_size_limit = MAX_LOADED_ACCOUNTS_DATA_SIZE_LIMIT;
+        }
         let mut timer = TradeTimer::new("构建买入交易指令");
 
         // 验证参数 - 转换为BuyParams进行验证

src/trading/core/params.rs

@@ -3,9 +3,9 @@ use solana_sdk::{pubkey::Pubkey, signature::Keypair};
 use std::sync::Arc;
 
 use super::traits::ProtocolParams;
+use crate::common::bonding_curve::BondingCurveAccount;
 use crate::common::{PriorityFee, SolanaRpcClient};
 use crate::swqos::SwqosClient;
-use crate::common::bonding_curve::BondingCurveAccount;
 
 /// 通用买入参数
 #[derive(Clone)]
@@ -74,24 +74,18 @@ pub struct SellWithTipParams {
 /// PumpFun协议特定参数
 #[derive(Clone)]
 pub struct PumpFunParams {
-    pub trade_type: String,
     pub bonding_curve: Option<Arc<BondingCurveAccount>>,
 }
 
-impl ProtocolParams for PumpFunParams {
-    fn as_any(&self) -> &dyn std::any::Any {
-        self
-    }
-
-    fn clone_box(&self) -> Box<dyn ProtocolParams> {
-        Box::new(self.clone())
+impl PumpFunParams {
+    pub fn default() -> Self {
+        Self {
+            bonding_curve: None,
+        }
     }
 }
 
-#[derive(Clone)]
-pub struct PumpFunSellParams {}
-
-impl ProtocolParams for PumpFunSellParams {
+impl ProtocolParams for PumpFunParams {
     fn as_any(&self) -> &dyn std::any::Any {
         self
     }
@@ -105,13 +99,18 @@ impl ProtocolParams for PumpFunSellParams {
 #[derive(Clone)]
 pub struct PumpSwapParams {
     pub pool: Option<Pubkey>,
-    pub pool_base_token_account: Option<Pubkey>,
-    pub pool_quote_token_account: Option<Pubkey>,
-    pub user_base_token_account: Option<Pubkey>,
-    pub user_quote_token_account: Option<Pubkey>,
     pub auto_handle_wsol: bool,
 }
 
+impl PumpSwapParams {
+    pub fn default() -> Self {
+        Self {
+            pool: None,
+            auto_handle_wsol: true,
+        }
+    }
+}
+
 impl ProtocolParams for PumpSwapParams {
     fn as_any(&self) -> &dyn std::any::Any {
         self
@@ -132,6 +131,18 @@ pub struct BonkParams {
     pub auto_handle_wsol: bool,
 }
 
+impl BonkParams {
+    pub fn default() -> Self {
+        Self {
+            virtual_base: None,
+            virtual_quote: None,
+            real_base_before: None,
+            real_quote_before: None,
+            auto_handle_wsol: true,
+        }
+    }
+}
+
 impl ProtocolParams for BonkParams {
     fn as_any(&self) -> &dyn std::any::Any {
         self

src/trading/core/traits.rs

@@ -1,7 +1,5 @@
 use anyhow::Result;
 use solana_sdk::instruction::Instruction;
-use std::sync::Arc;
-
 use super::params::{BuyParams, BuyWithTipParams, SellParams, SellWithTipParams};
 
 /// 交易执行器trait - 定义了所有交易协议都需要实现的核心方法