Update DEX protocol support for 4.0.13

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "4.0.11"
+version = "4.0.13"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",

README.md

@@ -81,7 +81,7 @@ This SDK is available in multiple languages:
 
 ## ✨ Features
 
-1. **PumpFun Trading**: Support for `buy`, `sell`, `buy_exact_sol_in`, and the new unified `buy_v2`/`sell_v2`/`buy_exact_quote_in_v2` instructions (SOL + USDC)
+1. **PumpFun Trading**: Unified SDK-side `buy`, `sell`, and `buy_exact_quote_in` flow, selecting legacy or V2 on-chain instructions as needed (SOL + USDC)
 2. **PumpSwap Trading**: Support for PumpSwap pool trading operations
 3. **Bonk Trading**: Support for Bonk trading operations
 4. **Raydium CPMM Trading**: Support for Raydium CPMM (Concentrated Pool Market Maker) trading operations
@@ -108,14 +108,14 @@ Add the dependency to your `Cargo.toml`:
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.9" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.13" }
 ```
 
 ### Use crates.io
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = "4.0.9"
+sol-trade-sdk = "4.0.13"
 ```
 
 ## 🛠️ Usage Examples
@@ -152,7 +152,6 @@ let trade_config = TradeConfig::builder(rpc_url, swqos_configs, commitment)
     // .check_min_tip(false)               // default: false - filter SWQOS below min tip
     // .swqos_cores_from_end(false)        // default: false - bind SWQOS to last N CPU cores
     // .mev_protection(false)              // default: false - MEV (Astralane QUIC :9000 or HTTP mev-protect / BlockRazor)
-    // .use_pumpfun_v2(true)              // PumpFun V2 (27 accounts, quote_mint); required for USDC-paired PumpFun coins
     .build();
 
 // Create TradingClient
@@ -335,7 +334,7 @@ PumpFun and PumpSwap support **cashback** for eligible tokens: part of the tradi
 
 - **When params come from RPC**: If you use `PumpFunParams::from_mint_by_rpc` or `PumpSwapParams::from_pool_address_by_rpc` / `from_mint_by_rpc`, the SDK reads `is_cashback_coin` from chain—no extra step.
 - **When params come from event/parser**: If you build params from trade events (e.g. [sol-parser-sdk](https://github.com/0xfnzero/sol-parser-sdk)), you **must** pass the cashback flag into the SDK:
-  - **PumpFun**: `PumpFunParams::from_trade(..., is_cashback_coin)` and `PumpFunParams::from_dev_trade(..., is_cashback_coin)` take an `is_cashback_coin` parameter. Set it from the parsed event (e.g. CreateEvent’s `is_cashback_enabled` or BondingCurve’s `is_cashback_coin`).
+  - **PumpFun**: `PumpFunParams::from_trade(..., mint, quote_mint, creator, ..., is_cashback_coin, mayhem_mode)` and `PumpFunParams::from_dev_trade(..., is_cashback_coin)` take an `is_cashback_coin` parameter. Set it from the parsed event (e.g. CreateEvent’s `is_cashback_enabled` or BondingCurve’s `is_cashback_coin`).
   - **PumpSwap**: `PumpSwapParams` has a field `is_cashback_coin`. When constructing params manually (e.g. from pool/trade events), set it from the parsed pool or event data.
 - The **pumpfun_copy_trading** and **pumpfun_sniper_trading** examples use sol-parser-sdk for gRPC subscription and pass `e.is_cashback_coin` when building params.
 - **Claim**: Use `client.claim_cashback_pumpfun()` and `client.claim_cashback_pumpswap(...)` to claim accumulated cashback.
@@ -355,7 +354,7 @@ Some PumpFun coins use **Creator Rewards Sharing**, so the on-chain `creator_vau
 
 The SDK does not fetch creator_vault from RPC on every sell (to avoid latency); pass the up-to-date vault from gRPC/events when available.
 
-#### PumpFun V1 vs V2 Instructions
+#### PumpFun Unified Buy/Sell With V1/V2 Instructions
 
 PumpFun has two instruction sets for bonding-curve trading:
 
@@ -366,42 +365,48 @@ PumpFun has two instruction sets for bonding-curve trading:
 | Quote mint | SOL only (legacy) | SOL or USDC (via `quote_mint` field) |
 | Transaction size | Smaller (fits `PACKET_DATA_SIZE` without LUT) | Larger (requires LUT for most transactions) |
 
-**Default: V1** (`use_pumpfun_v2 = false`). The SDK uses V1 instructions which produce smaller transactions that fit within the 1232-byte `PACKET_DATA_SIZE` limit without requiring an Address Lookup Table.
+The SDK-side builder is version-neutral: callers use the normal buy/sell flow, and `quote_mint` selects the correct on-chain discriminator and account layout internally. There is no user-facing V2 switch required.
+
+**Default: V1**. When `quote_mint` is `Pubkey::default()`, the SDK uses V1 instructions which produce smaller transactions that fit within the 1232-byte `PACKET_DATA_SIZE` limit without requiring an Address Lookup Table. Passing an explicit quote mint selects V2: WSOL/native SOL for SOL-paired V2, or USDC for USDC-paired pools.
 
 **Key changes in v2 instructions:**
 - `quote_mint` parameter — pass wrapped SOL for SOL-paired, or USDC mint for USDC-paired
 - 27 fixed accounts (buy) / 26 fixed accounts (sell) — **no optional accounts**
 - `buyback_fee_recipient`, `sharing_config`, and 6 `associated_quote_*` ATAs are now mandatory
 - Same pricing and cost as legacy instructions for SOL-paired coins
+- USDC-paired coins must be bought with USDC and sell back to USDC. The SDK rejects SOL input for USDC quote pools before transaction submission.
 
-**How to enable V2:**
+**Pass `quote_mint` into `PumpFunParams::from_trade`**:
 
-**Method 1 — Global runtime flag** (recommended for `TradingClient`; required for USDC-paired coins):
+When using event/parser data, pass the event's `quote_mint` right after `mint`. `Pubkey::default()` means the legacy SOL layout; explicit native SOL or WSOL means the SOL V2 layout; USDC means the USDC V2 layout.
 
 ```rust
-let trade_config = TradeConfig::builder(rpc_url, swqos_configs, commitment)
-    .use_pumpfun_v2(true)  // Switch all PumpFun trades to V2 instructions (27 accounts)
-    .build();
+// quote_mint is not a PDA. It is the quote SPL mint carried by parser/gRPC events:
+// - Legacy SOL pool: Pubkey::default() from log events
+// - SOL V2 pool: native SOL or WSOL from parser data
+// - USDC V2 pool: USDC mint
+let quote_mint = e.quote_mint;
+let params = PumpFunParams::from_trade(
+    e.bonding_curve,
+    e.associated_bonding_curve,
+    e.mint,
+    quote_mint,
+    e.creator,
+    e.creator_vault,
+    e.virtual_token_reserves,
+    e.virtual_quote_reserves,
+    e.real_token_reserves,
+    e.real_quote_reserves,
+    close_token_account_when_sell,
+    e.fee_recipient,
+    e.token_program,
+    e.is_cashback_coin,
+    Some(e.mayhem_mode),
+);
 ```
 
-**Method 2 — Set the quote mint on `PumpFunParams`**:
-
-When using the high-level `TradingClient`, keep `.use_pumpfun_v2(true)` enabled in `TradeConfig` and set `quote_mint` on the PumpFun params to select the pair:
-
-```rust
-use sol_trade_sdk::constants::WSOL_TOKEN_ACCOUNT;
-use sol_trade_sdk::constants::USDC_TOKEN_ACCOUNT;
-
-// SOL-paired coin with v2 layout
-let params = PumpFunParams::from_trade(/* ... */)
-    .with_quote_mint(WSOL_TOKEN_ACCOUNT);
-
-// USDC-paired coin (requires v2)
-let params = PumpFunParams::from_trade(/* ... */)
-    .with_quote_mint(USDC_TOKEN_ACCOUNT);
-```
-
-`with_quote_mint(...)` also marks the params as V2-capable for lower-level instruction builders, but the high-level `TradingClient` uses the client-level `use_pumpfun_v2` runtime flag when choosing V1 vs V2.
+For USDC-paired coins, pass `USDC_TOKEN_ACCOUNT` as the buy `input_mint` and sell `output_mint`; SOL/WSOL is only valid for SOL-paired PumpFun curves.
+When consuming parser events, map `quoteMint`, `virtualQuoteReserves`, and `realQuoteReserves` into `PumpFunParams::from_trade(...)`; USDC pools use `4_292_000_000` as the initial virtual quote reserve.
 
 > **Note**: V2 transactions with ATA creation + durable nonce may exceed `PACKET_DATA_SIZE`. Enable an Address Lookup Table (`address_lookup_table_account`) when using V2.
 

README_CN.md

@@ -81,7 +81,7 @@
 
 ## ✨ 项目特性
 
-1. **PumpFun 交易**: 支持 `buy`、`sell`、`buy_exact_sol_in` 以及全新的统一化 `buy_v2`/`sell_v2`/`buy_exact_quote_in_v2` 指令（SOL + USDC）
+1. **PumpFun 交易**: SDK 侧统一为 `buy`、`sell`、`buy_exact_quote_in` 流程，内部按需选择旧版或 V2 链上指令（SOL + USDC）
 2. **PumpSwap 交易**: 支持 PumpSwap 池的交易操作
 3. **Bonk 交易**: 支持 Bonk 的交易操作
 4. **Raydium CPMM 交易**: 支持 Raydium CPMM (Concentrated Pool Market Maker) 的交易操作
@@ -108,14 +108,14 @@ 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 = "4.0.9" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.13" }
 ```
 
 ### 使用 crates.io
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = "4.0.9"
+sol-trade-sdk = "4.0.13"
 ```
 
 ## 🛠️ 使用示例
@@ -152,7 +152,6 @@ let trade_config = TradeConfig::builder(rpc_url, swqos_configs, commitment)
     // .check_min_tip(false)               // 默认: false - 过滤低于最低小费的 SWQOS
     // .swqos_cores_from_end(false)        // 默认: false - 将 SWQOS 绑定到末尾 N 个 CPU 核心
     // .mev_protection(false)              // 默认: false - MEV（Astralane QUIC :9000 或 HTTP mev-protect / BlockRazor）
-    // .use_pumpfun_v2(true)               // PumpFun V2（27 个账户，quote_mint）；USDC 配对 PumpFun 币必须开启
     .build();
 
 // 创建 TradingClient
@@ -334,7 +333,7 @@ PumpFun 与 PumpSwap 支持**返现（Cashback）**：部分手续费可返还
 
 - **参数来自 RPC 时**：使用 `PumpFunParams::from_mint_by_rpc` 或 `PumpSwapParams::from_pool_address_by_rpc` / `from_mint_by_rpc` 时，SDK 会从链上读取 `is_cashback_coin`，无需额外传入。
 - **参数来自事件/解析器时**：若根据交易事件（如 [sol-parser-sdk](https://github.com/0xfnzero/sol-parser-sdk)）构建参数，**必须**把返现标志传给 SDK：
-  - **PumpFun**：`PumpFunParams::from_trade(..., is_cashback_coin)` 与 `PumpFunParams::from_dev_trade(..., is_cashback_coin)` 最后一个参数为 `is_cashback_coin`。从解析出的事件传入（如 sol-parser-sdk 的 `PumpFunTradeEvent.is_cashback_coin`）。
+  - **PumpFun**：`PumpFunParams::from_trade(..., mint, quote_mint, creator, ..., is_cashback_coin, mayhem_mode)` 与 `PumpFunParams::from_dev_trade(..., is_cashback_coin)` 都需要传入 `is_cashback_coin`。从解析出的事件传入（如 sol-parser-sdk 的 `PumpFunTradeEvent.is_cashback_coin`）。
   - **PumpSwap**：`PumpSwapParams` 有字段 `is_cashback_coin`。手动构造参数（如从池/交易事件）时，从解析到的池或事件数据中设置该字段。
 - **pumpfun_copy_trading**、**pumpfun_sniper_trading** 示例使用 sol-parser-sdk 订阅 gRPC 事件，并在构造参数时传入 `e.is_cashback_coin`。
 - **领取返现**：使用 `client.claim_cashback_pumpfun()` 和 `client.claim_cashback_pumpswap(...)` 领取累计的返现。
@@ -361,10 +360,12 @@ SDK 不会在每次卖出时通过 RPC 拉取 creator_vault（以避免延迟）
 - **sol-parser-sdk**：指令解析从账户 17、18 写入；若事件来自日志，账户填充器也会从指令补全。用 `PumpSwapParams::from_trade(..., e.coin_creator_vault_ata, e.coin_creator_vault_authority, ...)` 即可。
 - **solana-streamer**：指令解析从 `accounts.get(17)`、`accounts.get(18)` 写入。同样用事件的 `coin_creator_vault_ata`、`coin_creator_vault_authority` 调用 `from_trade`。
 
-### Pump.fun Bonding Curve v2（buy_v2 / sell_v2 / buy_exact_quote_in_v2）
+### Pump.fun Bonding Curve 统一买卖入口与 v2 指令
 
 Pump.fun 已升级 Bonding Curve 合约，推出**统一化 v2 指令**，通过固定账户布局同时支持 SOL 和 USDC 配对币。旧版 `buy`/`sell`/`buy_exact_sol_in` 仍可用于 SOL 配对币，且保持为默认选项。
 
+SDK 侧调用入口保持统一：正常使用 `buy` / `sell` 流程即可，SDK 会根据 `quote_mint` 自动选择正确的链上 discriminator 和账户布局。
+
 **v2 指令关键变化：**
 - 新增 `quote_mint` 参数 — SOL 配对传包装 SOL（`So11111111111111111111111111111111111111112`），USDC 配对传 USDC mint
 - 27 个固定账户（buy）/ 26 个固定账户（sell）— **无可选账户**
@@ -373,40 +374,44 @@ Pump.fun 已升级 Bonding Curve 合约，推出**统一化 v2 指令**，通过
 
 **使用方式：**
 
-高层 `TradingClient` 需要先在 `TradeConfig` 开启 PumpFun V2；USDC 配对币必须开启：
+把事件里的 `quote_mint` 传给 `PumpFunParams::from_trade`。`quote_mint` 不是 PDA，它就是 quote SPL mint；`Pubkey::default()` 表示旧版 SOL 布局，显式 native SOL/WSOL 表示 SOL V2，USDC 表示 USDC V2：
 
 ```rust
-let trade_config = TradeConfig::builder(rpc_url, swqos_configs, commitment)
-    .use_pumpfun_v2(true)
-    .build();
-```
+// SOL 池：log 事件里通常是 Pubkey::default()，parser 数据里可能是 native SOL/WSOL
+// USDC 池：就是 USDC mint
+let quote_mint = e.quote_mint;
 
-然后在 `PumpFunParams` 设置 `quote_mint` 来选择 SOL/USDC 配对：
-
-```rust
-use sol_trade_sdk::constants::WSOL_TOKEN_ACCOUNT;
-use sol_trade_sdk::constants::USDC_TOKEN_ACCOUNT;
-
-// SOL 配对币 — 传包装 SOL mint
-let params = PumpFunParams::from_trade(/* ... */)
-    .with_quote_mint(WSOL_TOKEN_ACCOUNT);
-
-// USDC 配对币（即将开放 — 必须使用 v2）
-let params = PumpFunParams::from_trade(/* ... */)
-    .with_quote_mint(USDC_TOKEN_ACCOUNT);
+let params = PumpFunParams::from_trade(
+    e.bonding_curve,
+    e.associated_bonding_curve,
+    e.mint,
+    quote_mint,
+    e.creator,
+    e.creator_vault,
+    e.virtual_token_reserves,
+    e.virtual_quote_reserves,
+    e.real_token_reserves,
+    e.real_quote_reserves,
+    close_token_account_when_sell,
+    e.fee_recipient,
+    e.token_program,
+    e.is_cashback_coin,
+    Some(e.mayhem_mode),
+);
 
 // 之后正常交易
 client.buy(buy_params).await?;
 client.sell(sell_params).await?;
 ```
 
-`with_quote_mint(...)` 会把参数标记为可使用 V2，底层 instruction builder 可据此走 V2；但高层 `TradingClient` 选择 V1/V2 时使用的是 client 级别的 `use_pumpfun_v2` 运行时开关。
+USDC 配对币必须用 USDC 买入、卖出也结算为 USDC；SOL/WSOL 只适用于 SOL 配对的 PumpFun 曲线。SDK 会在提交前拒绝 USDC quote 池的 SOL 输入，避免链上 6063 失败。
+消费 parser 事件时，需要把 `quoteMint`、`virtualQuoteReserves`、`realQuoteReserves` 传进 `PumpFunParams::from_trade(...)`；USDC 池初始虚拟 quote reserve 是 `4_292_000_000`。
 
-| quote_mint | use_v2_ix | 实际使用的指令 | 说明 |
-|-----------|-------------|---------|------|
-| 未设置（默认） | `false` | 旧版 `buy`/`sell`/`buy_exact_sol_in` | 向后兼容，仅 SOL |
-| `WSOL_TOKEN_ACCOUNT` | `true` | `buy_v2`/`sell_v2`/`buy_exact_quote_in_v2` | SOL 配对，统一布局 |
-| `USDC_TOKEN_ACCOUNT` | `true` | `buy_v2`/`sell_v2`/`buy_exact_quote_in_v2` | USDC 配对（必须使用 v2） |
+| quote_mint | 实际使用的指令 | 说明 |
+|-----------|---------|------|
+| 未设置（默认） | 旧版 `buy`/`sell`/`buy_exact_sol_in` | 向后兼容，仅 SOL |
+| `WSOL_TOKEN_ACCOUNT` / native SOL | `buy_v2`/`sell_v2`/`buy_exact_quote_in_v2` | SOL 配对，统一布局 |
+| `USDC_TOKEN_ACCOUNT` | `buy_v2`/`sell_v2`/`buy_exact_quote_in_v2` | USDC 配对（必须使用 v2） |
 
 ## 🛡️ MEV 保护服务
 

examples/address_lookup/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 sol-trade-sdk = { path = "../.." }
-sol-parser-sdk = "0.2.2"
+sol-parser-sdk = "0.4.14"
 solana-sdk = "3.0.0"
 solana-commitment-config = { version = "3.0.0", features = ["serde"] }
 tokio = { version = "1", features = ["full"] }

examples/address_lookup/src/main.rs

@@ -130,6 +130,16 @@ async fn pumpfun_copy_trade_with_grpc(
 
     let client = create_solana_trade_client().await?;
     let mint_pubkey = trade_info.mint;
+    let virtual_quote_reserves = if trade_info.virtual_quote_reserves != 0 {
+        trade_info.virtual_quote_reserves
+    } else {
+        trade_info.virtual_sol_reserves
+    };
+    let real_quote_reserves = if trade_info.virtual_quote_reserves != 0 {
+        trade_info.real_quote_reserves
+    } else {
+        trade_info.real_sol_reserves
+    };
     let slippage_basis_points = Some(100);
     let recent_blockhash = client.infrastructure.rpc.get_latest_blockhash().await?;
 
@@ -154,12 +164,13 @@ async fn pumpfun_copy_trade_with_grpc(
             trade_info.bonding_curve,
             trade_info.associated_bonding_curve,
             trade_info.mint,
+            trade_info.quote_mint,
             trade_info.creator,
             trade_info.creator_vault,
             trade_info.virtual_token_reserves,
-            trade_info.virtual_sol_reserves,
+            virtual_quote_reserves,
             trade_info.real_token_reserves,
-            trade_info.real_sol_reserves,
+            real_quote_reserves,
             None,
             trade_info.fee_recipient,
             trade_info.token_program,

examples/nonce_cache/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 sol-trade-sdk = { path = "../.." }
-sol-parser-sdk = "0.2.2"
+sol-parser-sdk = "0.4.14"
 solana-sdk = "3.0.0"
 solana-commitment-config = { version = "3.0.0", features = ["serde"] }
 spl-associated-token-account = "7.0.0"

examples/nonce_cache/src/main.rs

@@ -129,6 +129,16 @@ async fn pumpfun_copy_trade_with_grpc(
 
     let client = create_solana_trade_client().await?;
     let mint_pubkey = trade_info.mint;
+    let virtual_quote_reserves = if trade_info.virtual_quote_reserves != 0 {
+        trade_info.virtual_quote_reserves
+    } else {
+        trade_info.virtual_sol_reserves
+    };
+    let real_quote_reserves = if trade_info.virtual_quote_reserves != 0 {
+        trade_info.real_quote_reserves
+    } else {
+        trade_info.real_sol_reserves
+    };
     let slippage_basis_points = Some(100);
     let recent_blockhash = client.infrastructure.rpc.get_latest_blockhash().await?;
 
@@ -150,12 +160,13 @@ async fn pumpfun_copy_trade_with_grpc(
             trade_info.bonding_curve,
             trade_info.associated_bonding_curve,
             trade_info.mint,
+            trade_info.quote_mint,
             trade_info.creator,
             trade_info.creator_vault,
             trade_info.virtual_token_reserves,
-            trade_info.virtual_sol_reserves,
+            virtual_quote_reserves,
             trade_info.real_token_reserves,
-            trade_info.real_sol_reserves,
+            real_quote_reserves,
             None,
             trade_info.fee_recipient,
             trade_info.token_program,

examples/pumpfun_copy_trading/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 sol-trade-sdk = { path = "../.." }
-sol-parser-sdk = "0.2.2"
+sol-parser-sdk = "0.4.14"
 solana-sdk = "3.0.0"
 solana-commitment-config = { version = "3.0.0", features = ["serde"] }
 tokio = { version = "1", features = ["full"] }

examples/pumpfun_copy_trading/src/main.rs

@@ -128,6 +128,13 @@ async fn create_solana_trade_client() -> AnyResult<SolanaTrade> {
 async fn pumpfun_copy_trade(e: sol_parser_sdk::core::events::PumpFunTradeEvent) -> AnyResult<()> {
     let client = create_solana_trade_client().await?;
     let mint_pubkey = e.mint;
+    let virtual_quote_reserves = if e.virtual_quote_reserves != 0 {
+        e.virtual_quote_reserves
+    } else {
+        e.virtual_sol_reserves
+    };
+    let real_quote_reserves =
+        if e.virtual_quote_reserves != 0 { e.real_quote_reserves } else { e.real_sol_reserves };
     let slippage_basis_points = Some(100u64);
     let recent_blockhash = client.infrastructure.rpc.get_latest_blockhash().await?;
 
@@ -147,12 +154,13 @@ async fn pumpfun_copy_trade(e: sol_parser_sdk::core::events::PumpFunTradeEvent)
             e.bonding_curve,
             e.associated_bonding_curve,
             e.mint,
+            e.quote_mint,
             e.creator,
             e.creator_vault,
             e.virtual_token_reserves,
-            e.virtual_sol_reserves,
+            virtual_quote_reserves,
             e.real_token_reserves,
-            e.real_sol_reserves,
+            real_quote_reserves,
             None,
             e.fee_recipient,
             e.token_program,
@@ -197,12 +205,13 @@ async fn pumpfun_copy_trade(e: sol_parser_sdk::core::events::PumpFunTradeEvent)
             e.bonding_curve,
             e.associated_bonding_curve,
             e.mint,
+            e.quote_mint,
             e.creator,
             e.creator_vault,
             e.virtual_token_reserves,
-            e.virtual_sol_reserves,
+            virtual_quote_reserves,
             e.real_token_reserves,
-            e.real_sol_reserves,
+            real_quote_reserves,
             Some(true),
             e.fee_recipient,
             e.token_program,

examples/pumpfun_sniper_trading/Cargo.toml

@@ -5,7 +5,7 @@ edition = "2021"
 
 [dependencies]
 sol-trade-sdk = { path = "../.." }
-sol-parser-sdk = "0.2.2"
+sol-parser-sdk = "0.4.14"
 solana-sdk = "3.0.0"
 solana-commitment-config = { version = "3.0.0", features = ["serde"] }
 tokio = { version = "1", features = ["full"] }

examples/pumpfun_sniper_trading/src/main.rs

@@ -118,6 +118,13 @@ async fn create_solana_trade_client() -> AnyResult<SolanaTrade> {
 async fn pumpfun_sniper_trade(e: sol_parser_sdk::core::events::PumpFunTradeEvent) -> AnyResult<()> {
     let client = create_solana_trade_client().await?;
     let mint_pubkey = e.mint;
+    let virtual_quote_reserves = if e.virtual_quote_reserves != 0 {
+        e.virtual_quote_reserves
+    } else {
+        e.virtual_sol_reserves
+    };
+    let real_quote_reserves =
+        if e.virtual_quote_reserves != 0 { e.real_quote_reserves } else { e.real_sol_reserves };
     let slippage_basis_points = Some(300u64);
     let recent_blockhash = client.infrastructure.rpc.get_latest_blockhash().await?;
 
@@ -181,12 +188,13 @@ async fn pumpfun_sniper_trade(e: sol_parser_sdk::core::events::PumpFunTradeEvent
             e.bonding_curve,
             e.associated_bonding_curve,
             e.mint,
+            e.quote_mint,
             e.creator,
             e.creator_vault,
             e.virtual_token_reserves,
-            e.virtual_sol_reserves,
+            virtual_quote_reserves,
             e.real_token_reserves,
-            e.real_sol_reserves,
+            real_quote_reserves,
             Some(true),
             e.fee_recipient,
             e.token_program,

src/client/mod.rs

@@ -312,8 +312,6 @@ pub struct TradingClient {
     pub log_enabled: bool,
     /// Whether to check minimum tip per SWQOS (from TradeConfig.check_min_tip). Default false for lower latency.
     pub check_min_tip: bool,
-    /// Use PumpFun V2 instructions (buy_v2 / sell_v2, 27-account metas). Default false.
-    pub use_pumpfun_v2: bool,
 }
 
 static INSTANCE: Mutex<Option<Arc<TradingClient>>> = Mutex::new(None);
@@ -334,7 +332,6 @@ impl Clone for TradingClient {
             effective_core_ids: self.effective_core_ids.clone(),
             log_enabled: self.log_enabled,
             check_min_tip: self.check_min_tip,
-            use_pumpfun_v2: self.use_pumpfun_v2,
         }
     }
 }
@@ -380,7 +377,7 @@ pub struct TradeBuyParams {
     pub gas_fee_strategy: GasFeeStrategy,
     /// Whether to simulate the transaction instead of executing it
     pub simulate: bool,
-    /// Use exact SOL amount instructions (buy_exact_sol_in for PumpFun, buy_exact_quote_in for PumpSwap).
+    /// Use exact quote-input buy instructions (legacy PumpFun uses SOL quote; V2/PumpSwap use generic quote).
     /// When Some(true) or None (default), the exact SOL/quote amount is spent and slippage is applied to output tokens.
     /// When Some(false), uses regular buy instruction where slippage is applied to SOL/quote input.
     /// This option only applies to PumpFun and PumpSwap DEXes; it is ignored for other DEXes.
@@ -471,7 +468,6 @@ impl TradingClient {
             effective_core_ids,
             log_enabled: true,
             check_min_tip: false,
-            use_pumpfun_v2: false,
         }
     }
 
@@ -518,7 +514,6 @@ impl TradingClient {
             effective_core_ids,
             log_enabled: true,
             check_min_tip: false,
-            use_pumpfun_v2: false,
         }
     }
 
@@ -698,7 +693,6 @@ impl TradingClient {
             effective_core_ids: infrastructure.effective_core_ids.clone(),
             log_enabled: trade_config.log_enabled,
             check_min_tip: trade_config.check_min_tip,
-            use_pumpfun_v2: trade_config.use_pumpfun_v2,
         };
 
         let mut current = INSTANCE.lock();
@@ -881,7 +875,6 @@ impl TradingClient {
             check_min_tip: self.check_min_tip,
             grpc_recv_us: params.grpc_recv_us,
             use_exact_sol_amount: params.use_exact_sol_amount,
-            use_pumpfun_v2: self.use_pumpfun_v2,
         };
 
         let swap_result = executor.swap(buy_params).await;
@@ -997,7 +990,6 @@ impl TradingClient {
             check_min_tip: self.check_min_tip,
             grpc_recv_us: params.grpc_recv_us,
             use_exact_sol_amount: None,
-            use_pumpfun_v2: self.use_pumpfun_v2,
         };
 
         let swap_result = executor.swap(sell_params).await;

src/common/bonding_curve.rs

@@ -31,7 +31,7 @@ use solana_sdk::pubkey::Pubkey;
 
 use crate::instruction::utils::pumpfun::global_constants::{
     INITIAL_REAL_TOKEN_RESERVES, INITIAL_VIRTUAL_SOL_RESERVES, INITIAL_VIRTUAL_TOKEN_RESERVES,
-    TOKEN_TOTAL_SUPPLY,
+    INITIAL_VIRTUAL_USDC_RESERVES, TOKEN_TOTAL_SUPPLY,
 };
 use crate::instruction::utils::pumpfun::{get_bonding_curve_pda, get_creator_vault_pda};
 
@@ -62,9 +62,57 @@ pub struct BondingCurveAccount {
     pub is_mayhem_mode: bool,
     /// Whether this coin has cashback enabled (creator fee redirected to users)
     pub is_cashback_coin: bool,
+    /// Quote mint for V2 curves. Defaults to WSOL for legacy/event payloads that do not expose it.
+    pub quote_mint: Pubkey,
 }
 
 impl BondingCurveAccount {
+    #[inline]
+    pub fn normalize_quote_mint(quote_mint: Pubkey) -> Pubkey {
+        if quote_mint == Pubkey::default() || quote_mint == crate::constants::SOL_TOKEN_ACCOUNT {
+            crate::constants::WSOL_TOKEN_ACCOUNT
+        } else {
+            quote_mint
+        }
+    }
+
+    #[inline]
+    pub fn effective_quote_mint(&self) -> Pubkey {
+        Self::normalize_quote_mint(self.quote_mint)
+    }
+
+    #[inline]
+    pub fn initial_virtual_quote_reserves_for_quote_mint(quote_mint: &Pubkey) -> u64 {
+        if *quote_mint == crate::constants::USDC_TOKEN_ACCOUNT {
+            INITIAL_VIRTUAL_USDC_RESERVES
+        } else {
+            INITIAL_VIRTUAL_SOL_RESERVES
+        }
+    }
+
+    #[inline]
+    pub fn virtual_quote_reserves(&self) -> u64 {
+        self.virtual_sol_reserves
+    }
+
+    #[inline]
+    pub fn real_quote_reserves(&self) -> u64 {
+        self.real_sol_reserves
+    }
+
+    #[inline]
+    pub fn with_quote_mint(mut self, quote_mint: Pubkey) -> Self {
+        let quote_mint = Self::normalize_quote_mint(quote_mint);
+        let old_initial =
+            Self::initial_virtual_quote_reserves_for_quote_mint(&self.effective_quote_mint());
+        let new_initial = Self::initial_virtual_quote_reserves_for_quote_mint(&quote_mint);
+        if self.virtual_sol_reserves == old_initial.saturating_add(self.real_sol_reserves) {
+            self.virtual_sol_reserves = new_initial.saturating_add(self.real_sol_reserves);
+        }
+        self.quote_mint = quote_mint;
+        self
+    }
+
     /// When building from event/parser data (e.g. sol-parser-sdk), pass the token's cashback flag
     /// so that sell instructions include the correct remaining accounts. From RPC use `from_mint_by_rpc` instead.
     pub fn from_dev_trade(
@@ -75,24 +123,50 @@ impl BondingCurveAccount {
         creator: Pubkey,
         is_mayhem_mode: bool,
         is_cashback_coin: bool,
+    ) -> Self {
+        Self::from_dev_trade_with_quote_mint(
+            bonding_curve,
+            mint,
+            dev_token_amount,
+            dev_sol_amount,
+            creator,
+            is_mayhem_mode,
+            is_cashback_coin,
+            crate::constants::WSOL_TOKEN_ACCOUNT,
+        )
+    }
+
+    /// Same as [`Self::from_dev_trade`], but quote-aware for V2 pools such as USDC.
+    pub fn from_dev_trade_with_quote_mint(
+        bonding_curve: Pubkey,
+        mint: &Pubkey,
+        dev_token_amount: u64,
+        dev_quote_amount: u64,
+        creator: Pubkey,
+        is_mayhem_mode: bool,
+        is_cashback_coin: bool,
+        quote_mint: Pubkey,
     ) -> Self {
         let account = if bonding_curve != Pubkey::default() {
             bonding_curve
         } else {
             get_bonding_curve_pda(&mint).unwrap()
         };
+        let quote_mint = Self::normalize_quote_mint(quote_mint);
         Self {
             discriminator: 0,
             account: account,
             virtual_token_reserves: INITIAL_VIRTUAL_TOKEN_RESERVES - dev_token_amount,
-            virtual_sol_reserves: INITIAL_VIRTUAL_SOL_RESERVES + dev_sol_amount,
+            virtual_sol_reserves: Self::initial_virtual_quote_reserves_for_quote_mint(&quote_mint)
+                + dev_quote_amount,
             real_token_reserves: INITIAL_REAL_TOKEN_RESERVES - dev_token_amount,
-            real_sol_reserves: dev_sol_amount,
+            real_sol_reserves: dev_quote_amount,
             token_total_supply: TOKEN_TOTAL_SUPPLY,
             complete: false,
             creator: creator,
             is_mayhem_mode: is_mayhem_mode,
             is_cashback_coin,
+            quote_mint,
         }
     }
 
@@ -108,24 +182,53 @@ impl BondingCurveAccount {
         real_sol_reserves: u64,
         is_mayhem_mode: bool,
         is_cashback_coin: bool,
+    ) -> Self {
+        Self::from_trade_with_quote_mint(
+            bonding_curve,
+            mint,
+            creator,
+            virtual_token_reserves,
+            virtual_sol_reserves,
+            real_token_reserves,
+            real_sol_reserves,
+            is_mayhem_mode,
+            is_cashback_coin,
+            crate::constants::WSOL_TOKEN_ACCOUNT,
+        )
+    }
+
+    /// Same as [`Self::from_trade`], but carries the V2 quote mint alongside quote reserves.
+    pub fn from_trade_with_quote_mint(
+        bonding_curve: Pubkey,
+        mint: Pubkey,
+        creator: Pubkey,
+        virtual_token_reserves: u64,
+        virtual_quote_reserves: u64,
+        real_token_reserves: u64,
+        real_quote_reserves: u64,
+        is_mayhem_mode: bool,
+        is_cashback_coin: bool,
+        quote_mint: Pubkey,
     ) -> Self {
         let account = if bonding_curve != Pubkey::default() {
             bonding_curve
         } else {
             get_bonding_curve_pda(&mint).unwrap()
         };
+        let quote_mint = Self::normalize_quote_mint(quote_mint);
         Self {
             discriminator: 0,
             account: account,
             virtual_token_reserves: virtual_token_reserves,
-            virtual_sol_reserves: virtual_sol_reserves,
+            virtual_sol_reserves: virtual_quote_reserves,
             real_token_reserves: real_token_reserves,
-            real_sol_reserves: real_sol_reserves,
+            real_sol_reserves: real_quote_reserves,
             token_total_supply: TOKEN_TOTAL_SUPPLY,
             complete: false,
             creator: creator,
             is_mayhem_mode: is_mayhem_mode,
             is_cashback_coin,
+            quote_mint,
         }
     }
 

src/common/types.rs

@@ -103,9 +103,6 @@ pub struct TradeConfig {
     /// (Astralane QUIC `:9000` or Plain/Binary HTTP `mev-protect=true`, BlockRazor sandwichMitigation)
     /// use their MEV-protected endpoints/modes. Default false (no MEV protection, lower latency).
     pub mev_protection: bool,
-    /// Use PumpFun V2 instructions (buy_v2 / sell_v2, 27/26-account metas, quote_mint support).
-    /// Default: `false` keeps legacy SOL-paired instructions for smaller transactions; V2 is the official future-proof interface.
-    pub use_pumpfun_v2: bool,
 }
 
 impl TradeConfig {
@@ -160,7 +157,6 @@ pub struct TradeConfigBuilder {
     check_min_tip: bool,
     swqos_cores_from_end: bool,
     mev_protection: bool,
-    use_pumpfun_v2: bool,
 }
 
 impl TradeConfigBuilder {
@@ -175,7 +171,6 @@ impl TradeConfigBuilder {
             check_min_tip: false,
             swqos_cores_from_end: false,
             mev_protection: false,
-            use_pumpfun_v2: false,
         }
     }
 
@@ -221,14 +216,6 @@ impl TradeConfigBuilder {
         self
     }
 
-    /// Use PumpFun V2 instructions (`buy_v2` / `sell_v2`, 27-account metas, `quote_mint` support).
-    /// Default: `false` (V1 — 18-account metas, legacy SOL-paired, smaller transaction).
-    /// Set to `true` when PumpFun officially deploys V2 on mainnet.
-    pub fn use_pumpfun_v2(mut self, v: bool) -> Self {
-        self.use_pumpfun_v2 = v;
-        self
-    }
-
     /// Consume the builder and produce a [`TradeConfig`].
     pub fn build(self) -> TradeConfig {
         TradeConfig {
@@ -241,7 +228,6 @@ impl TradeConfigBuilder {
             check_min_tip: self.check_min_tip,
             swqos_cores_from_end: self.swqos_cores_from_end,
             mev_protection: self.mev_protection,
-            use_pumpfun_v2: self.use_pumpfun_v2,
         }
     }
 }

src/instruction/bonk.rs

@@ -389,7 +389,6 @@ mod tests {
             check_min_tip: false,
             grpc_recv_us: None,
             use_exact_sol_amount: None,
-            use_pumpfun_v2: false,
         }
     }
 

src/instruction/meteora_damm_v2.rs

@@ -371,7 +371,6 @@ mod tests {
             check_min_tip: false,
             grpc_recv_us: None,
             use_exact_sol_amount: None,
-            use_pumpfun_v2: false,
         }
     }
 

src/instruction/pumpfun.rs

@@ -1,10 +1,12 @@
 //! Pump.fun bonding-curve swap ix assembly ([`SwapParams`](crate::trading::core::params::SwapParams)).
 //!
-//! Runtime flag: set `SwapParams.use_pumpfun_v2 = true` to use `buy_v2` / `sell_v2` /
-//! `buy_exact_quote_in_v2` (27/26-account unified metas, quote_mint support).
+//! The SDK selects the legacy or V2 on-chain layout from `PumpFunParams.quote_mint`.
+//! `Pubkey::default()` keeps the smaller legacy SOL layout; explicit WSOL/native SOL
+//! or USDC uses the V2 27/26-account unified metas.
 //! Default (`false`) keeps the smaller legacy SOL-paired instruction layout for latency.
 
 use crate::{
+    common::bonding_curve::BondingCurveAccount,
     common::spl_token::close_account,
     constants::{trade::trade::DEFAULT_SLIPPAGE, TOKEN_PROGRAM_2022},
     trading::core::{
@@ -50,32 +52,98 @@ fn effective_pump_mint_token_program(protocol_params: &PumpFunParams) -> Pubkey
 /// `Pubkey::default()` means legacy SOL-paired → use WSOL mint for V2 instructions.
 #[inline]
 fn effective_quote_mint_and_token_program(protocol_params: &PumpFunParams) -> (Pubkey, Pubkey) {
-    let quote_mint = if protocol_params.quote_mint == Pubkey::default() {
-        crate::constants::WSOL_TOKEN_ACCOUNT
+    let curve_quote_mint = protocol_params.bonding_curve.effective_quote_mint();
+    let quote_mint = if protocol_params.quote_mint != Pubkey::default() {
+        BondingCurveAccount::normalize_quote_mint(protocol_params.quote_mint)
+    } else if curve_quote_mint != Pubkey::default() {
+        curve_quote_mint
     } else {
-        protocol_params.quote_mint
+        crate::constants::WSOL_TOKEN_ACCOUNT
     };
     (quote_mint, crate::constants::TOKEN_PROGRAM)
 }
 
+#[inline]
+fn is_sol_quote_mint(quote_mint: &Pubkey) -> bool {
+    *quote_mint == crate::constants::WSOL_TOKEN_ACCOUNT
+        || *quote_mint == crate::constants::SOL_TOKEN_ACCOUNT
+}
+
+#[inline]
+fn validate_v2_buy_quote_mint(input_mint: &Pubkey, quote_mint: &Pubkey) -> Result<()> {
+    if is_sol_quote_mint(quote_mint) {
+        if *input_mint == crate::constants::SOL_TOKEN_ACCOUNT
+            || *input_mint == crate::constants::WSOL_TOKEN_ACCOUNT
+        {
+            return Ok(());
+        }
+    } else if input_mint == quote_mint {
+        return Ok(());
+    }
+    Err(anyhow!(
+        "PumpFun V2 buy input_mint {} does not match quote_mint {}; USDC quote pools must be bought with USDC, not SOL",
+        input_mint,
+        quote_mint
+    ))
+}
+
+#[inline]
+fn validate_v2_sell_quote_mint(output_mint: &Pubkey, quote_mint: &Pubkey) -> Result<()> {
+    if is_sol_quote_mint(quote_mint) {
+        if *output_mint == crate::constants::SOL_TOKEN_ACCOUNT
+            || *output_mint == crate::constants::WSOL_TOKEN_ACCOUNT
+        {
+            return Ok(());
+        }
+    } else if output_mint == quote_mint {
+        return Ok(());
+    }
+    Err(anyhow!(
+        "PumpFun V2 sell output_mint {} does not match quote_mint {}; USDC quote pools settle to USDC, not SOL",
+        output_mint,
+        quote_mint
+    ))
+}
+
 pub struct PumpFunInstructionBuilder;
 
 #[async_trait::async_trait]
 impl InstructionBuilder for PumpFunInstructionBuilder {
     async fn build_buy_instructions(&self, params: &SwapParams) -> Result<Vec<Instruction>> {
-        if params.use_pumpfun_v2 {
-            build_buy_v2(params)
-        } else {
-            build_buy_v1(params)
-        }
+        build_buy(params)
     }
 
     async fn build_sell_instructions(&self, params: &SwapParams) -> Result<Vec<Instruction>> {
-        if params.use_pumpfun_v2 {
-            build_sell_v2(params)
-        } else {
-            build_sell_v1(params)
-        }
+        build_sell(params)
+    }
+}
+
+#[inline]
+fn should_use_v2_layout(params: &SwapParams) -> Result<bool> {
+    let protocol_params = params
+        .protocol_params
+        .as_any()
+        .downcast_ref::<PumpFunParams>()
+        .ok_or_else(|| anyhow!("Invalid protocol params for PumpFun"))?;
+    let (quote_mint, _) = effective_quote_mint_and_token_program(protocol_params);
+    Ok(protocol_params.quote_mint != Pubkey::default() || !is_sol_quote_mint(&quote_mint))
+}
+
+#[inline]
+fn build_buy(params: &SwapParams) -> Result<Vec<Instruction>> {
+    if should_use_v2_layout(params)? {
+        build_buy_unified(params)
+    } else {
+        build_buy_legacy(params)
+    }
+}
+
+#[inline]
+fn build_sell(params: &SwapParams) -> Result<Vec<Instruction>> {
+    if should_use_v2_layout(params)? {
+        build_sell_unified(params)
+    } else {
+        build_sell_legacy(params)
     }
 }
 
@@ -83,9 +151,9 @@ impl InstructionBuilder for PumpFunInstructionBuilder {
 // V1 (default) — 18 metas, no quote_mint ATA create
 // ---------------------------------------------------------------------------
 
-fn build_buy_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
+fn build_buy_legacy(params: &SwapParams) -> Result<Vec<Instruction>> {
     use crate::instruction::pumpfun_ix_data::{
-        encode_pumpfun_buy_exact_sol_in_ix_data, encode_pumpfun_buy_ix_data,
+        encode_pumpfun_buy_exact_quote_in_ix_data, encode_pumpfun_buy_ix_data, PumpFunIxVersion,
     };
     use crate::instruction::utils::pumpfun::{
         get_bonding_curve_v2_pda, get_protocol_extra_fee_recipient_random,
@@ -160,8 +228,9 @@ fn build_buy_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
 
     // ── Legacy buy path ──
     let track_volume_val = if bonding_curve.is_cashback_coin { 1u8 } else { 0u8 };
+    let ix_version = PumpFunIxVersion::Legacy { track_volume: track_volume_val };
     let buy_data = if let Some(token_amount) = params.fixed_output_amount {
-        encode_pumpfun_buy_ix_data(token_amount, lamports_in, track_volume_val)
+        encode_pumpfun_buy_ix_data(token_amount, lamports_in, ix_version)
     } else {
         let buy_token_amount = get_buy_token_amount_from_sol_amount(
             bonding_curve.virtual_token_reserves as u128,
@@ -172,10 +241,10 @@ fn build_buy_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
         );
         if params.use_exact_sol_amount.unwrap_or(true) {
             let min_tokens_out = calculate_with_slippage_sell(buy_token_amount, slippage_bp);
-            encode_pumpfun_buy_exact_sol_in_ix_data(lamports_in, min_tokens_out, track_volume_val)
+            encode_pumpfun_buy_exact_quote_in_ix_data(lamports_in, min_tokens_out, ix_version)
         } else {
             let max_sol_cost = calculate_with_slippage_buy(lamports_in, slippage_bp);
-            encode_pumpfun_buy_ix_data(buy_token_amount, max_sol_cost, track_volume_val)
+            encode_pumpfun_buy_ix_data(buy_token_amount, max_sol_cost, ix_version)
         }
     };
 
@@ -206,13 +275,13 @@ fn build_buy_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
     metas.push(AccountMeta::new_readonly(bonding_curve_v2, false));
     metas.push(AccountMeta::new(get_protocol_extra_fee_recipient_random(), false));
 
-    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, &buy_data, metas));
+    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, buy_data.as_slice(), metas));
 
     Ok(instructions)
 }
 
-fn build_sell_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
-    use crate::instruction::pumpfun_ix_data::encode_pumpfun_sell_ix_data;
+fn build_sell_legacy(params: &SwapParams) -> Result<Vec<Instruction>> {
+    use crate::instruction::pumpfun_ix_data::{encode_pumpfun_sell_ix_data, PumpFunIxVersion};
     use crate::instruction::utils::pumpfun::{
         get_bonding_curve_v2_pda, get_protocol_extra_fee_recipient_random,
         is_phantom_default_creator_vault,
@@ -299,7 +368,11 @@ fn build_sell_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
         .ok_or_else(|| anyhow!("user_volume_accumulator PDA derivation failed"))?;
 
     let mut instructions = Vec::with_capacity(2);
-    let sell_data = encode_pumpfun_sell_ix_data(token_amount, min_sol_output);
+    let sell_data = encode_pumpfun_sell_ix_data(
+        token_amount,
+        min_sol_output,
+        PumpFunIxVersion::Legacy { track_volume: 0 },
+    );
 
     let fee_recipient_meta =
         pump_fun_fee_recipient_meta(protocol_params.fee_recipient, is_mayhem_mode);
@@ -331,7 +404,7 @@ fn build_sell_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
     metas.push(AccountMeta::new_readonly(bonding_curve_v2, false));
     metas.push(AccountMeta::new(get_protocol_extra_fee_recipient_random(), false));
 
-    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, &sell_data, metas));
+    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, sell_data.as_slice(), metas));
 
     if protocol_params.close_token_account_when_sell.unwrap_or(false) || params.close_input_mint_ata
     {
@@ -348,12 +421,12 @@ fn build_sell_v1(params: &SwapParams) -> Result<Vec<Instruction>> {
 }
 
 // ---------------------------------------------------------------------------
-// V2 (opt-in via `use_pumpfun_v2 = true`) — 27 metas, quote_mint ATA create
+// V2 — 27 metas, quote_mint ATA create
 // ---------------------------------------------------------------------------
 
-fn build_buy_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
+fn build_buy_unified(params: &SwapParams) -> Result<Vec<Instruction>> {
     use crate::instruction::pumpfun_ix_data::{
-        encode_pumpfun_buy_exact_quote_in_v2_ix_data, encode_pumpfun_buy_v2_ix_data,
+        encode_pumpfun_buy_exact_quote_in_ix_data, encode_pumpfun_buy_ix_data, PumpFunIxVersion,
     };
     use crate::instruction::utils::pumpfun::{
         get_buyback_fee_recipient_random, get_fee_sharing_config_pda,
@@ -395,6 +468,7 @@ fn build_buy_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
     };
 
     let (quote_mint, quote_token_program) = effective_quote_mint_and_token_program(protocol_params);
+    validate_v2_buy_quote_mint(&params.input_mint, &quote_mint)?;
     let quote_token_program_meta = crate::constants::TOKEN_PROGRAM_META;
 
     let associated_base_bonding_curve =
@@ -477,7 +551,7 @@ fn build_buy_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
     }
 
     let (buy_data, quote_amount_to_fund) = if let Some(token_amount) = params.fixed_output_amount {
-        (encode_pumpfun_buy_v2_ix_data(token_amount, lamports_in), lamports_in)
+        (encode_pumpfun_buy_ix_data(token_amount, lamports_in, PumpFunIxVersion::V2), lamports_in)
     } else {
         let buy_token_amount = get_buy_token_amount_from_sol_amount(
             bonding_curve.virtual_token_reserves as u128,
@@ -488,10 +562,20 @@ fn build_buy_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
         );
         if params.use_exact_sol_amount.unwrap_or(true) {
             let min_tokens_out = calculate_with_slippage_sell(buy_token_amount, slippage_bp);
-            (encode_pumpfun_buy_exact_quote_in_v2_ix_data(lamports_in, min_tokens_out), lamports_in)
+            (
+                encode_pumpfun_buy_exact_quote_in_ix_data(
+                    lamports_in,
+                    min_tokens_out,
+                    PumpFunIxVersion::V2,
+                ),
+                lamports_in,
+            )
         } else {
             let max_sol_cost = calculate_with_slippage_buy(lamports_in, slippage_bp);
-            (encode_pumpfun_buy_v2_ix_data(buy_token_amount, max_sol_cost), max_sol_cost)
+            (
+                encode_pumpfun_buy_ix_data(buy_token_amount, max_sol_cost, PumpFunIxVersion::V2),
+                max_sol_cost,
+            )
         }
     };
 
@@ -515,7 +599,7 @@ fn build_buy_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
         AccountMeta::new_readonly(accounts::ASSOCIATED_TOKEN_PROGRAM, false),
         fee_recipient_meta,
         AccountMeta::new(associated_quote_fee_recipient, false),
-        AccountMeta::new_readonly(buyback_fee_recipient, false),
+        AccountMeta::new(buyback_fee_recipient, false),
         AccountMeta::new(associated_quote_buyback_fee_recipient, false),
         AccountMeta::new(bonding_curve_addr, false),
         AccountMeta::new(associated_base_bonding_curve, false),
@@ -536,7 +620,7 @@ fn build_buy_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
         accounts::PUMPFUN_META,
     ];
 
-    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, &buy_data, metas));
+    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, buy_data.as_slice(), metas));
 
     if params.close_input_mint_ata {
         push_close_wsol_if_needed(&mut instructions, &params.payer.pubkey(), &quote_mint);
@@ -545,8 +629,8 @@ fn build_buy_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
     Ok(instructions)
 }
 
-fn build_sell_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
-    use crate::instruction::pumpfun_ix_data::encode_pumpfun_sell_v2_ix_data;
+fn build_sell_unified(params: &SwapParams) -> Result<Vec<Instruction>> {
+    use crate::instruction::pumpfun_ix_data::{encode_pumpfun_sell_ix_data, PumpFunIxVersion};
     use crate::instruction::utils::pumpfun::{
         get_buyback_fee_recipient_random, get_fee_sharing_config_pda,
         is_phantom_default_creator_vault,
@@ -615,6 +699,7 @@ fn build_sell_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
     };
 
     let (quote_mint, quote_token_program) = effective_quote_mint_and_token_program(protocol_params);
+    validate_v2_sell_quote_mint(&params.output_mint, &quote_mint)?;
     let quote_token_program_meta = crate::constants::TOKEN_PROGRAM_META;
 
     let associated_base_bonding_curve =
@@ -694,7 +779,7 @@ fn build_sell_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
         );
     }
 
-    let sell_data = encode_pumpfun_sell_v2_ix_data(token_amount, min_sol_output);
+    let sell_data = encode_pumpfun_sell_ix_data(token_amount, min_sol_output, PumpFunIxVersion::V2);
 
     let metas: Vec<AccountMeta> = vec![
         global_constants::GLOBAL_ACCOUNT_META,
@@ -705,7 +790,7 @@ fn build_sell_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
         AccountMeta::new_readonly(accounts::ASSOCIATED_TOKEN_PROGRAM, false),
         fee_recipient_meta,
         AccountMeta::new(associated_quote_fee_recipient, false),
-        AccountMeta::new_readonly(buyback_fee_recipient, false),
+        AccountMeta::new(buyback_fee_recipient, false),
         AccountMeta::new(associated_quote_buyback_fee_recipient, false),
         AccountMeta::new(bonding_curve_addr, false),
         AccountMeta::new(associated_base_bonding_curve, false),
@@ -725,7 +810,7 @@ fn build_sell_v2(params: &SwapParams) -> Result<Vec<Instruction>> {
         accounts::PUMPFUN_META,
     ];
 
-    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, &sell_data, metas));
+    instructions.push(Instruction::new_with_bytes(accounts::PUMPFUN, sell_data.as_slice(), metas));
 
     if protocol_params.close_token_account_when_sell.unwrap_or(false) || params.close_input_mint_ata
     {
@@ -802,7 +887,6 @@ mod tests {
             close_token_account_when_sell: None,
             fee_recipient: global_constants::FEE_RECIPIENT,
             quote_mint: Pubkey::default(),
-            use_v2_ix: false,
         };
 
         SwapParams {
@@ -839,7 +923,6 @@ mod tests {
             check_min_tip: false,
             grpc_recv_us: None,
             use_exact_sol_amount: Some(true),
-            use_pumpfun_v2: false,
         }
     }
 
@@ -855,7 +938,7 @@ mod tests {
     fn pump_suffix_buy_respects_explicit_legacy_token_program() {
         crate::common::seed::set_default_rents();
         let params = swap_params_for_buy(pump_mint(), TOKEN_PROGRAM);
-        let instructions = build_buy_v1(&params).unwrap();
+        let instructions = build_buy(&params).unwrap();
 
         assert_eq!(instructions.len(), 3);
         assert_eq!(instructions[2].accounts[8].pubkey, TOKEN_PROGRAM);
@@ -868,7 +951,7 @@ mod tests {
     fn non_pump_buy_respects_explicit_legacy_token_program() {
         crate::common::seed::set_default_rents();
         let params = swap_params_for_buy(Pubkey::new_unique(), TOKEN_PROGRAM);
-        let instructions = build_buy_v1(&params).unwrap();
+        let instructions = build_buy(&params).unwrap();
 
         assert_eq!(instructions[2].accounts[8].pubkey, TOKEN_PROGRAM);
     }
@@ -880,7 +963,7 @@ mod tests {
         params.fixed_output_amount = Some(42);
         params.use_exact_sol_amount = Some(true);
 
-        let instructions = build_buy_v1(&params).unwrap();
+        let instructions = build_buy(&params).unwrap();
         let ix = instructions.last().unwrap();
 
         assert_eq!(&ix.data[..8], crate::instruction::utils::pumpfun::BUY_DISCRIMINATOR);
@@ -899,8 +982,12 @@ mod tests {
         params.create_output_mint_ata = false;
         params.fixed_output_amount = Some(42);
         params.use_exact_sol_amount = Some(true);
+        if let DexParamEnum::PumpFun(protocol_params) = &mut params.protocol_params {
+            *protocol_params =
+                protocol_params.clone().with_quote_mint(crate::constants::WSOL_TOKEN_ACCOUNT);
+        }
 
-        let instructions = build_buy_v2(&params).unwrap();
+        let instructions = build_buy(&params).unwrap();
         let ix = instructions.last().unwrap();
 
         assert_eq!(&ix.data[..8], crate::instruction::utils::pumpfun::BUY_V2_DISCRIMINATOR);
@@ -917,8 +1004,12 @@ mod tests {
         params.create_output_mint_ata = false;
         params.create_input_mint_ata = true;
         params.use_exact_sol_amount = Some(false);
+        if let DexParamEnum::PumpFun(protocol_params) = &mut params.protocol_params {
+            *protocol_params =
+                protocol_params.clone().with_quote_mint(crate::constants::WSOL_TOKEN_ACCOUNT);
+        }
 
-        let instructions = build_buy_v2(&params).unwrap();
+        let instructions = build_buy(&params).unwrap();
         let transfer_ix = &instructions[1];
         let system_ix = bincode::deserialize::<
             solana_system_interface::instruction::SystemInstruction,
@@ -937,6 +1028,199 @@ mod tests {
         }
     }
 
+    #[test]
+    fn pumpfun_usdc_dev_trade_uses_usdc_initial_quote_reserves() {
+        let mint = pump_mint();
+        let dev_quote_amount = 707_080;
+        let params = PumpFunParams::from_dev_trade_with_quote_mint(
+            mint,
+            55_855_975_892_641,
+            dev_quote_amount,
+            Pubkey::new_unique(),
+            Pubkey::default(),
+            Pubkey::default(),
+            Pubkey::default(),
+            None,
+            global_constants::FEE_RECIPIENT,
+            TOKEN_PROGRAM,
+            false,
+            Some(false),
+            crate::constants::USDC_TOKEN_ACCOUNT,
+        );
+
+        assert_eq!(params.quote_mint, crate::constants::USDC_TOKEN_ACCOUNT);
+        assert_eq!(params.bonding_curve.quote_mint, crate::constants::USDC_TOKEN_ACCOUNT);
+        assert_eq!(
+            params.bonding_curve.virtual_sol_reserves,
+            global_constants::INITIAL_VIRTUAL_USDC_RESERVES + dev_quote_amount
+        );
+    }
+
+    #[test]
+    fn pumpfun_with_quote_mint_adjusts_dev_trade_quote_reserves() {
+        let mint = pump_mint();
+        let dev_quote_amount = 707_080;
+        let params = PumpFunParams::from_dev_trade(
+            mint,
+            55_855_975_892_641,
+            dev_quote_amount,
+            Pubkey::new_unique(),
+            Pubkey::default(),
+            Pubkey::default(),
+            Pubkey::default(),
+            None,
+            global_constants::FEE_RECIPIENT,
+            TOKEN_PROGRAM,
+            false,
+            Some(false),
+        )
+        .with_quote_mint(crate::constants::USDC_TOKEN_ACCOUNT);
+
+        assert_eq!(
+            params.bonding_curve.virtual_sol_reserves,
+            global_constants::INITIAL_VIRTUAL_USDC_RESERVES + dev_quote_amount
+        );
+    }
+
+    #[test]
+    fn pumpfun_usdc_trade_event_preserves_virtual_quote_reserves() {
+        let mint = pump_mint();
+        let virtual_quote_reserves = 4_527_693_121;
+        let real_quote_reserves = 235_693_121;
+        let params = PumpFunParams::from_trade(
+            Pubkey::default(),
+            Pubkey::default(),
+            mint,
+            crate::constants::USDC_TOKEN_ACCOUNT,
+            Pubkey::new_unique(),
+            Pubkey::default(),
+            944_144_024_107_359,
+            virtual_quote_reserves,
+            737_244_024_107_359,
+            real_quote_reserves,
+            None,
+            global_constants::FEE_RECIPIENT,
+            TOKEN_PROGRAM,
+            false,
+            Some(false),
+        );
+
+        assert_eq!(params.quote_mint, crate::constants::USDC_TOKEN_ACCOUNT);
+        assert_eq!(params.bonding_curve.virtual_quote_reserves(), virtual_quote_reserves);
+        assert_eq!(params.bonding_curve.real_quote_reserves(), real_quote_reserves);
+    }
+
+    #[test]
+    fn pumpfun_native_sol_quote_mint_normalizes_to_wsol() {
+        let mint = pump_mint();
+        let params = PumpFunParams::from_trade(
+            Pubkey::default(),
+            Pubkey::default(),
+            mint,
+            crate::constants::SOL_TOKEN_ACCOUNT,
+            Pubkey::new_unique(),
+            Pubkey::default(),
+            944_144_024_107_359,
+            30_235_693_121,
+            737_244_024_107_359,
+            235_693_121,
+            None,
+            global_constants::FEE_RECIPIENT,
+            TOKEN_PROGRAM,
+            false,
+            Some(false),
+        );
+
+        assert_eq!(params.quote_mint, crate::constants::WSOL_TOKEN_ACCOUNT);
+        assert_eq!(params.bonding_curve.quote_mint, crate::constants::WSOL_TOKEN_ACCOUNT);
+    }
+
+    #[test]
+    fn pumpfun_v2_usdc_buy_rejects_sol_input() {
+        let mut params = swap_params_for_buy(pump_mint(), TOKEN_PROGRAM);
+        params.create_output_mint_ata = false;
+        params.input_mint = crate::constants::SOL_TOKEN_ACCOUNT;
+        if let DexParamEnum::PumpFun(protocol_params) = &mut params.protocol_params {
+            *protocol_params =
+                protocol_params.clone().with_quote_mint(crate::constants::USDC_TOKEN_ACCOUNT);
+        }
+
+        let err = build_buy(&params).unwrap_err().to_string();
+        assert!(err.contains("USDC quote pools must be bought with USDC"));
+    }
+
+    #[test]
+    fn pumpfun_usdc_quote_mint_selects_v2_without_global_flag() {
+        let mut params = swap_params_for_buy(pump_mint(), TOKEN_PROGRAM);
+        params.create_output_mint_ata = false;
+        params.input_mint = crate::constants::USDC_TOKEN_ACCOUNT;
+        if let DexParamEnum::PumpFun(protocol_params) = &mut params.protocol_params {
+            *protocol_params =
+                protocol_params.clone().with_quote_mint(crate::constants::USDC_TOKEN_ACCOUNT);
+        }
+
+        let ix = build_buy(&params).unwrap().pop().unwrap();
+        assert_eq!(
+            &ix.data[..8],
+            crate::instruction::utils::pumpfun::BUY_EXACT_QUOTE_IN_V2_DISCRIMINATOR
+        );
+        assert_eq!(ix.accounts.len(), 27);
+    }
+
+    #[test]
+    fn pumpfun_v2_usdc_buy_uses_idl_accounts_17_18_19() {
+        let mint = pump_mint();
+        let mut params = swap_params_for_buy(mint, TOKEN_PROGRAM);
+        params.create_output_mint_ata = false;
+        params.input_mint = crate::constants::USDC_TOKEN_ACCOUNT;
+        if let DexParamEnum::PumpFun(protocol_params) = &mut params.protocol_params {
+            *protocol_params =
+                protocol_params.clone().with_quote_mint(crate::constants::USDC_TOKEN_ACCOUNT);
+        }
+
+        let associated_creator_vault =
+            if let DexParamEnum::PumpFun(protocol_params) = &params.protocol_params {
+                crate::common::fast_fn::get_associated_token_address_with_program_id_fast(
+                    &protocol_params.creator_vault,
+                    &crate::constants::USDC_TOKEN_ACCOUNT,
+                    &crate::constants::TOKEN_PROGRAM,
+                )
+            } else {
+                Pubkey::default()
+            };
+        let ix = build_buy(&params).unwrap().pop().unwrap();
+        assert_eq!(ix.accounts.len(), 27);
+        assert_eq!(ix.accounts[17].pubkey, associated_creator_vault);
+        assert_eq!(
+            ix.accounts[18].pubkey,
+            crate::instruction::utils::pumpfun::get_fee_sharing_config_pda(&mint).unwrap()
+        );
+        assert_eq!(ix.accounts[19].pubkey, accounts::GLOBAL_VOLUME_ACCUMULATOR);
+        assert_eq!(ix.accounts[22].pubkey, accounts::FEE_CONFIG);
+    }
+
+    #[test]
+    fn pumpfun_v2_buyback_fee_recipient_is_writable() {
+        let mint = pump_mint();
+        let mut params = swap_params_for_buy(mint, TOKEN_PROGRAM);
+        params.create_output_mint_ata = false;
+        if let DexParamEnum::PumpFun(protocol_params) = &mut params.protocol_params {
+            *protocol_params =
+                protocol_params.clone().with_quote_mint(crate::constants::WSOL_TOKEN_ACCOUNT);
+        }
+
+        let buy_ix = build_buy(&params).unwrap().pop().unwrap();
+        assert!(global_constants::BUYBACK_FEE_RECIPIENTS.contains(&buy_ix.accounts[8].pubkey));
+        assert!(buy_ix.accounts[8].is_writable);
+
+        params.trade_type = crate::swqos::TradeType::Sell;
+        params.input_mint = mint;
+        params.output_mint = crate::constants::SOL_TOKEN_ACCOUNT;
+        let sell_ix = build_sell(&params).unwrap().pop().unwrap();
+        assert!(global_constants::BUYBACK_FEE_RECIPIENTS.contains(&sell_ix.accounts[8].pubkey));
+        assert!(sell_ix.accounts[8].is_writable);
+    }
+
     #[test]
     fn pumpfun_v1_sell_fixed_output_uses_min_sol_directly() {
         let mint = pump_mint();
@@ -947,7 +1231,7 @@ mod tests {
         params.create_output_mint_ata = false;
         params.fixed_output_amount = Some(42);
 
-        let instructions = build_sell_v1(&params).unwrap();
+        let instructions = build_sell(&params).unwrap();
         let ix = instructions.last().unwrap();
 
         assert_eq!(&ix.data[..8], crate::instruction::utils::pumpfun::SELL_DISCRIMINATOR);
@@ -968,8 +1252,12 @@ mod tests {
         params.output_mint = crate::constants::SOL_TOKEN_ACCOUNT;
         params.create_output_mint_ata = false;
         params.fixed_output_amount = Some(42);
+        if let DexParamEnum::PumpFun(protocol_params) = &mut params.protocol_params {
+            *protocol_params =
+                protocol_params.clone().with_quote_mint(crate::constants::WSOL_TOKEN_ACCOUNT);
+        }
 
-        let instructions = build_sell_v2(&params).unwrap();
+        let instructions = build_sell(&params).unwrap();
         let ix = instructions.last().unwrap();
 
         assert_eq!(&ix.data[..8], crate::instruction::utils::pumpfun::SELL_V2_DISCRIMINATOR);

src/instruction/pumpfun_ix_data.rs

@@ -1,5 +1,6 @@
-//! Pump.fun 曲线 **legacy** `buy` / `buy_exact_sol_in` / `sell` 与 **`buy_v2` / `sell_v2` / `buy_exact_quote_in_v2`**
-//! 的 instruction data 栈上编码（热路径零堆分配）。
+//! Pump.fun bonding-curve `buy` / `buy_exact_quote_in` / `sell`
+//! instruction data stack encoding. The public helper names are version-neutral;
+//! [`PumpFunIxVersion`] selects the legacy or V2 on-chain discriminator.
 //!
 //! Legacy `buy` / `buy_exact_sol_in` 与 `@pump-fun/pump-sdk` 对齐：`OptionBool` 是单字段
 //! struct（TypeScript 传 `[true]`），在 ix 参数中为 1 字节 bool，共 25 字节 ix data。
@@ -10,71 +11,90 @@ use crate::instruction::utils::pumpfun::{
     BUY_V2_DISCRIMINATOR, SELL_DISCRIMINATOR, SELL_V2_DISCRIMINATOR,
 };
 
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub(crate) enum PumpFunIxVersion {
+    Legacy { track_volume: u8 },
+    V2,
+}
+
+#[derive(Clone, Copy, Debug, Eq, PartialEq)]
+pub(crate) enum PumpFunIxData {
+    Bytes25([u8; 25]),
+    Bytes24([u8; 24]),
+}
+
+impl PumpFunIxData {
+    #[inline(always)]
+    pub(crate) fn as_slice(&self) -> &[u8] {
+        match self {
+            Self::Bytes25(data) => data,
+            Self::Bytes24(data) => data,
+        }
+    }
+}
+
 #[inline(always)]
-pub fn encode_pumpfun_buy_ix_data(
+pub(crate) fn encode_pumpfun_buy_ix_data(
     token_amount: u64,
-    max_sol_cost: u64,
-    track_volume_val: u8,
-) -> [u8; 25] {
-    let mut d = [0u8; 25];
-    d[..8].copy_from_slice(&BUY_DISCRIMINATOR);
-    d[8..16].copy_from_slice(&token_amount.to_le_bytes());
-    d[16..24].copy_from_slice(&max_sol_cost.to_le_bytes());
-    d[24] = track_volume_val;
-    d
+    max_quote_cost: u64,
+    version: PumpFunIxVersion,
+) -> PumpFunIxData {
+    match version {
+        PumpFunIxVersion::Legacy { track_volume } => {
+            let mut d = [0u8; 25];
+            d[..8].copy_from_slice(&BUY_DISCRIMINATOR);
+            d[8..16].copy_from_slice(&token_amount.to_le_bytes());
+            d[16..24].copy_from_slice(&max_quote_cost.to_le_bytes());
+            d[24] = track_volume;
+            PumpFunIxData::Bytes25(d)
+        }
+        PumpFunIxVersion::V2 => {
+            let mut d = [0u8; 24];
+            d[..8].copy_from_slice(&BUY_V2_DISCRIMINATOR);
+            d[8..16].copy_from_slice(&token_amount.to_le_bytes());
+            d[16..24].copy_from_slice(&max_quote_cost.to_le_bytes());
+            PumpFunIxData::Bytes24(d)
+        }
+    }
 }
 
 #[inline(always)]
-pub fn encode_pumpfun_buy_exact_sol_in_ix_data(
-    spendable_sol_in: u64,
-    min_tokens_out: u64,
-    track_volume_val: u8,
-) -> [u8; 25] {
-    let mut d = [0u8; 25];
-    d[..8].copy_from_slice(&BUY_EXACT_SOL_IN_DISCRIMINATOR);
-    d[8..16].copy_from_slice(&spendable_sol_in.to_le_bytes());
-    d[16..24].copy_from_slice(&min_tokens_out.to_le_bytes());
-    d[24] = track_volume_val;
-    d
-}
-
-#[inline(always)]
-pub fn encode_pumpfun_sell_ix_data(token_amount: u64, min_sol_output: u64) -> [u8; 24] {
-    let mut d = [0u8; 24];
-    d[..8].copy_from_slice(&SELL_DISCRIMINATOR);
-    d[8..16].copy_from_slice(&token_amount.to_le_bytes());
-    d[16..24].copy_from_slice(&min_sol_output.to_le_bytes());
-    d
-}
-
-// --- v2 instruction data encoders (no track_volume arg — 2 args each, 24 bytes total) ---
-
-#[inline(always)]
-pub fn encode_pumpfun_buy_v2_ix_data(amount: u64, max_sol_cost: u64) -> [u8; 24] {
-    let mut d = [0u8; 24];
-    d[..8].copy_from_slice(&BUY_V2_DISCRIMINATOR);
-    d[8..16].copy_from_slice(&amount.to_le_bytes());
-    d[16..24].copy_from_slice(&max_sol_cost.to_le_bytes());
-    d
-}
-
-#[inline(always)]
-pub fn encode_pumpfun_buy_exact_quote_in_v2_ix_data(
+pub(crate) fn encode_pumpfun_buy_exact_quote_in_ix_data(
     spendable_quote_in: u64,
     min_tokens_out: u64,
-) -> [u8; 24] {
-    let mut d = [0u8; 24];
-    d[..8].copy_from_slice(&BUY_EXACT_QUOTE_IN_V2_DISCRIMINATOR);
-    d[8..16].copy_from_slice(&spendable_quote_in.to_le_bytes());
-    d[16..24].copy_from_slice(&min_tokens_out.to_le_bytes());
-    d
+    version: PumpFunIxVersion,
+) -> PumpFunIxData {
+    match version {
+        PumpFunIxVersion::Legacy { track_volume } => {
+            let mut d = [0u8; 25];
+            d[..8].copy_from_slice(&BUY_EXACT_SOL_IN_DISCRIMINATOR);
+            d[8..16].copy_from_slice(&spendable_quote_in.to_le_bytes());
+            d[16..24].copy_from_slice(&min_tokens_out.to_le_bytes());
+            d[24] = track_volume;
+            PumpFunIxData::Bytes25(d)
+        }
+        PumpFunIxVersion::V2 => {
+            let mut d = [0u8; 24];
+            d[..8].copy_from_slice(&BUY_EXACT_QUOTE_IN_V2_DISCRIMINATOR);
+            d[8..16].copy_from_slice(&spendable_quote_in.to_le_bytes());
+            d[16..24].copy_from_slice(&min_tokens_out.to_le_bytes());
+            PumpFunIxData::Bytes24(d)
+        }
+    }
 }
 
 #[inline(always)]
-pub fn encode_pumpfun_sell_v2_ix_data(token_amount: u64, min_sol_output: u64) -> [u8; 24] {
+pub(crate) fn encode_pumpfun_sell_ix_data(
+    token_amount: u64,
+    min_quote_output: u64,
+    version: PumpFunIxVersion,
+) -> PumpFunIxData {
     let mut d = [0u8; 24];
-    d[..8].copy_from_slice(&SELL_V2_DISCRIMINATOR);
+    d[..8].copy_from_slice(match version {
+        PumpFunIxVersion::Legacy { .. } => &SELL_DISCRIMINATOR,
+        PumpFunIxVersion::V2 => &SELL_V2_DISCRIMINATOR,
+    });
     d[8..16].copy_from_slice(&token_amount.to_le_bytes());
-    d[16..24].copy_from_slice(&min_sol_output.to_le_bytes());
-    d
+    d[16..24].copy_from_slice(&min_quote_output.to_le_bytes());
+    PumpFunIxData::Bytes24(d)
 }

src/instruction/pumpswap.rs

@@ -596,7 +596,6 @@ mod tests {
             check_min_tip: false,
             grpc_recv_us: None,
             use_exact_sol_amount: Some(true),
-            use_pumpfun_v2: false,
         }
     }
 

src/instruction/raydium_amm_v4.rs

@@ -389,7 +389,6 @@ mod tests {
             check_min_tip: false,
             grpc_recv_us: None,
             use_exact_sol_amount: None,
-            use_pumpfun_v2: false,
         }
     }
 

src/instruction/raydium_cpmm.rs

@@ -401,7 +401,6 @@ mod tests {
             check_min_tip: false,
             grpc_recv_us: None,
             use_exact_sol_amount: None,
-            use_pumpfun_v2: false,
         }
     }
 

src/instruction/utils/pumpfun.rs

@@ -39,6 +39,7 @@ pub mod global_constants {
 
     pub const INITIAL_VIRTUAL_TOKEN_RESERVES: u64 = 1_073_000_000_000_000;
     pub const INITIAL_VIRTUAL_SOL_RESERVES: u64 = 30_000_000_000;
+    pub const INITIAL_VIRTUAL_USDC_RESERVES: u64 = 4_292_000_000;
     pub const INITIAL_REAL_TOKEN_RESERVES: u64 = 793_100_000_000_000;
     pub const TOKEN_TOTAL_SUPPLY: u64 = 1_000_000_000_000_000;
     pub const FEE_BASIS_POINTS: u64 = 95;

src/trading/core/params/dex_swap.rs

@@ -94,14 +94,11 @@ pub struct SwapParams {
     pub check_min_tip: bool,
     /// Optional event receive time in microseconds (same scale as sol-parser-sdk clock::now_micros). Used as timing start when log_enabled.
     pub grpc_recv_us: Option<i64>,
-    /// Use exact SOL amount instructions (buy_exact_sol_in for PumpFun, buy_exact_quote_in for PumpSwap).
+    /// Use exact quote-input buy instructions (legacy PumpFun uses SOL quote; V2/PumpSwap use generic quote).
     /// When Some(true) or None (default), the exact SOL/quote amount is spent and slippage is applied to output tokens.
     /// When Some(false), uses regular buy instruction where slippage is applied to SOL/quote input.
     /// This option only applies to PumpFun and PumpSwap DEXes; it is ignored for other DEXes.
     pub use_exact_sol_amount: Option<bool>,
-    /// Use PumpFun V2 instructions (buy_v2 / sell_v2 / buy_exact_quote_in_v2, 27/26-account metas, quote_mint support).
-    /// Default: `false` keeps legacy SOL-paired instructions for smaller transactions; V2 is the official future-proof interface.
-    pub use_pumpfun_v2: bool,
 }
 
 impl SwapParams {

src/trading/core/params/pumpfun.rs

@@ -14,9 +14,9 @@ use std::sync::Arc;
 /// **Buy/sell**：`creator_vault` 及（若可得）**`tradeEvent` / CPI 日志中的 `creator`** 优先于陈旧的曲线快照；
 /// ix 组装与链下询价见 [`Self::effective_creator_for_trade`]、[`crate::instruction::utils::pumpfun::resolve_creator_vault_for_ix_with_fee_sharing`]。
 ///
-/// **V2 instructions**: Set `use_v2_ix = true` to use `buy_v2`/`sell_v2`/`buy_exact_quote_in_v2`
-/// with unified 27/26-account layout. Required for USDC-paired coins (`quote_mint != WSOL`).
-/// For SOL-paired coins, legacy instructions still work and are the default.
+/// **V2 instructions**: The SDK selects the layout automatically from `quote_mint`.
+/// Leave `quote_mint` default for legacy SOL layout, pass WSOL/native SOL for SOL V2,
+/// or pass USDC for USDC-paired coins.
 #[derive(Clone)]
 pub struct PumpFunParams {
     pub bonding_curve: Arc<BondingCurveAccount>,
@@ -43,9 +43,6 @@ pub struct PumpFunParams {
     /// Quote mint for v2 instructions (default: `So11111111111111111111111111111111111111112` for SOL-paired).
     /// For USDC-paired coins, set to `EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v`.
     pub quote_mint: Pubkey,
-    /// Whether to use v2 instructions (`buy_v2`/`sell_v2`/`buy_exact_quote_in_v2`).
-    /// Default `false` for backward compatibility. Must be `true` for USDC-paired coins.
-    pub use_v2_ix: bool,
 }
 
 impl PumpFunParams {
@@ -64,12 +61,12 @@ impl PumpFunParams {
             close_token_account_when_sell: Some(close_token_account_when_sell),
             fee_recipient: Pubkey::default(),
             quote_mint: Pubkey::default(),
-            use_v2_ix: false,
         }
     }
 
-    /// When building from event/parser (e.g. sol-parser-sdk), pass `is_cashback_coin` from the event
-    /// so that sell instructions include the correct remaining accounts for cashback.
+    /// Build PumpFun params from a SOL-paired dev trade event. For USDC-paired dev trades,
+    /// use [`Self::from_dev_trade_with_quote_mint`] so reserve reconstruction uses the right quote mint.
+    /// Also pass `is_cashback_coin` from the event so sells include the correct remaining accounts.
     /// `mayhem_mode`: `Some` when known from Create/Trade event (`is_mayhem_mode` / `mayhem_mode`).
     /// `None` falls back to detecting Mayhem via reserved fee recipient pubkeys only (not AMM protocol fee accounts).
     pub fn from_dev_trade(
@@ -86,15 +83,51 @@ impl PumpFunParams {
         is_cashback_coin: bool,
         mayhem_mode: Option<bool>,
     ) -> Self {
-        let is_mayhem_mode = reconcile_mayhem_mode_for_trade(mayhem_mode, &fee_recipient);
-        let bonding_curve_account = BondingCurveAccount::from_dev_trade(
-            bonding_curve,
-            &mint,
+        Self::from_dev_trade_with_quote_mint(
+            mint,
             token_amount,
             max_sol_cost,
             creator,
+            bonding_curve,
+            associated_bonding_curve,
+            creator_vault,
+            close_token_account_when_sell,
+            fee_recipient,
+            token_program,
+            is_cashback_coin,
+            mayhem_mode,
+            Pubkey::default(),
+        )
+    }
+
+    /// Quote-aware constructor for PumpFun V2 pools. Use this for USDC-paired coins so
+    /// dev-trade reserve reconstruction uses the quote mint's initial virtual reserves.
+    pub fn from_dev_trade_with_quote_mint(
+        mint: Pubkey,
+        token_amount: u64,
+        max_quote_cost: u64,
+        creator: Pubkey,
+        bonding_curve: Pubkey,
+        associated_bonding_curve: Pubkey,
+        creator_vault: Pubkey,
+        close_token_account_when_sell: Option<bool>,
+        fee_recipient: Pubkey,
+        token_program: Pubkey,
+        is_cashback_coin: bool,
+        mayhem_mode: Option<bool>,
+        quote_mint: Pubkey,
+    ) -> Self {
+        let is_mayhem_mode = reconcile_mayhem_mode_for_trade(mayhem_mode, &fee_recipient);
+        let effective_quote_mint = BondingCurveAccount::normalize_quote_mint(quote_mint);
+        let bonding_curve_account = BondingCurveAccount::from_dev_trade_with_quote_mint(
+            bonding_curve,
+            &mint,
+            token_amount,
+            max_quote_cost,
+            creator,
             is_mayhem_mode,
             is_cashback_coin,
+            effective_quote_mint,
         );
         let creator_vault_resolved =
             crate::instruction::utils::pumpfun::resolve_creator_vault_for_ix_with_fee_sharing(
@@ -118,13 +151,18 @@ impl PumpFunParams {
             close_token_account_when_sell: close_token_account_when_sell,
             token_program: token_program,
             fee_recipient,
-            quote_mint: Pubkey::default(),
-            use_v2_ix: false,
+            quote_mint: if quote_mint == Pubkey::default() {
+                Pubkey::default()
+            } else {
+                effective_quote_mint
+            },
         }
     }
 
-    /// When building from event/parser (e.g. sol-parser-sdk), pass `is_cashback_coin` from the event
-    /// so that sell instructions include the correct remaining accounts for cashback.
+    /// Build PumpFun params from event/parser data. Pass `quote_mint` from the event:
+    /// `Pubkey::default()` for legacy SOL layout, `WSOL_TOKEN_ACCOUNT`/native SOL for SOL V2,
+    /// and `USDC_TOKEN_ACCOUNT` for USDC V2.
+    /// Also pass `is_cashback_coin` from the event so sells include the correct remaining accounts.
     ///
     /// `mayhem_mode`:
     /// - **`Some(v)`**：优先采用 gRPC / `tradeEvent`，但与 **`fee_recipient` 所属池**（Mayhem vs 普通，见 pump-public-docs）不一致时，以 fee 地址为准纠偏，避免链上 `NotAuthorized`。
@@ -133,12 +171,13 @@ impl PumpFunParams {
         bonding_curve: Pubkey,
         associated_bonding_curve: Pubkey,
         mint: Pubkey,
+        quote_mint: Pubkey,
         creator: Pubkey,
         creator_vault: Pubkey,
         virtual_token_reserves: u64,
-        virtual_sol_reserves: u64,
+        virtual_quote_reserves: u64,
         real_token_reserves: u64,
-        real_sol_reserves: u64,
+        real_quote_reserves: u64,
         close_token_account_when_sell: Option<bool>,
         fee_recipient: Pubkey,
         token_program: Pubkey,
@@ -146,16 +185,18 @@ impl PumpFunParams {
         mayhem_mode: Option<bool>,
     ) -> Self {
         let is_mayhem_mode = reconcile_mayhem_mode_for_trade(mayhem_mode, &fee_recipient);
-        let bonding_curve = BondingCurveAccount::from_trade(
+        let effective_quote_mint = BondingCurveAccount::normalize_quote_mint(quote_mint);
+        let bonding_curve = BondingCurveAccount::from_trade_with_quote_mint(
             bonding_curve,
             mint,
             creator,
             virtual_token_reserves,
-            virtual_sol_reserves,
+            virtual_quote_reserves,
             real_token_reserves,
-            real_sol_reserves,
+            real_quote_reserves,
             is_mayhem_mode,
             is_cashback_coin,
+            effective_quote_mint,
         );
         let creator_vault_resolved =
             crate::instruction::utils::pumpfun::resolve_creator_vault_for_ix_with_fee_sharing(
@@ -177,11 +218,52 @@ impl PumpFunParams {
             close_token_account_when_sell: close_token_account_when_sell,
             token_program: token_program,
             fee_recipient,
-            quote_mint: Pubkey::default(),
-            use_v2_ix: false,
+            quote_mint: if quote_mint == Pubkey::default() {
+                Pubkey::default()
+            } else {
+                effective_quote_mint
+            },
         }
     }
 
+    /// Deprecated compatibility alias. Prefer [`Self::from_trade`] and pass `quote_mint` there.
+    #[deprecated(note = "use PumpFunParams::from_trade(..., quote_mint)")]
+    pub fn from_trade_with_quote_mint(
+        bonding_curve: Pubkey,
+        associated_bonding_curve: Pubkey,
+        mint: Pubkey,
+        creator: Pubkey,
+        creator_vault: Pubkey,
+        virtual_token_reserves: u64,
+        virtual_quote_reserves: u64,
+        real_token_reserves: u64,
+        real_quote_reserves: u64,
+        close_token_account_when_sell: Option<bool>,
+        fee_recipient: Pubkey,
+        token_program: Pubkey,
+        is_cashback_coin: bool,
+        mayhem_mode: Option<bool>,
+        quote_mint: Pubkey,
+    ) -> Self {
+        Self::from_trade(
+            bonding_curve,
+            associated_bonding_curve,
+            mint,
+            quote_mint,
+            creator,
+            creator_vault,
+            virtual_token_reserves,
+            virtual_quote_reserves,
+            real_token_reserves,
+            real_quote_reserves,
+            close_token_account_when_sell,
+            fee_recipient,
+            token_program,
+            is_cashback_coin,
+            mayhem_mode,
+        )
+    }
+
     /// 仅 RPC 读取曲线快照；[`Self::observed_trade_creator`] 为 `None`，便于 bot 缓存合并时用粘性的 trade 日志 creator 覆盖陈旧曲线推导。
     pub async fn from_mint_by_rpc(
         rpc: &SolanaRpcClient,
@@ -202,6 +284,7 @@ impl PumpFunParams {
             creator: account.0.creator,
             is_mayhem_mode: account.0.is_mayhem_mode,
             is_cashback_coin: account.0.is_cashback_coin,
+            quote_mint: account.0.quote_mint,
         };
         let associated_bonding_curve = get_associated_token_address_with_program_id(
             &bonding_curve.account,
@@ -224,6 +307,7 @@ impl PumpFunParams {
                 crate::instruction::utils::pumpfun::get_creator_vault_pda(&bonding_curve.creator)
             })
             .unwrap_or_default();
+        let quote_mint = bonding_curve.quote_mint;
         Ok(Self {
             bonding_curve: Arc::new(bonding_curve),
             associated_bonding_curve: associated_bonding_curve,
@@ -233,8 +317,7 @@ impl PumpFunParams {
             close_token_account_when_sell: None,
             token_program: mint_account.owner,
             fee_recipient: Pubkey::default(),
-            quote_mint: Pubkey::default(),
-            use_v2_ix: false,
+            quote_mint,
         })
     }
 
@@ -273,12 +356,16 @@ impl PumpFunParams {
         Ok(self)
     }
 
-    /// Sets `quote_mint` and enables v2 instructions. Required for USDC-paired coins.
+    /// Sets `quote_mint`. The instruction builder derives V1/V2 layout from this value.
     /// For SOL-paired coins, pass `WSOL_TOKEN_ACCOUNT` or leave default.
     #[inline]
     pub fn with_quote_mint(mut self, quote_mint: Pubkey) -> Self {
-        self.quote_mint = quote_mint;
-        self.use_v2_ix = quote_mint != Pubkey::default();
+        let effective_quote_mint = BondingCurveAccount::normalize_quote_mint(quote_mint);
+        self.quote_mint =
+            if quote_mint == Pubkey::default() { Pubkey::default() } else { effective_quote_mint };
+        if let Some(curve) = Arc::get_mut(&mut self.bonding_curve) {
+            *curve = curve.clone().with_quote_mint(effective_quote_mint);
+        }
         self
     }