Release v4.0.0: SWQoS transport improvements and Binary-Tx response handling

Major changes:
- Switch BlockRazor default transport from gRPC to HTTP to avoid FRAME_SIZE_ERROR
  - gRPC mode still available via explicit SwqosTransport configuration
- Fix ZeroSlot Binary-Tx JSON-RPC 2.0 response parsing
  - Properly handle success responses with "result" field
  - Properly handle error responses with "error" field containing code and message
- Update version to 4.0.0
- Update README files to reflect new version

Technical details:
- BlockRazor: HTTP mode is now the default (SwqosTransport::Http or None)
- ZeroSlot: Parse JSON-RPC 2.0 format responses instead of plain text
- Proto code: Pre-generated gRPC code for BlockRazor (no protoc required)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -1,30 +1,12 @@
-# Generated by Cargo
+# Proto 生成工具和生成的代码（用户不需要）
-# will have compiled files and executables
+/proto/gen/
-debug/
-target/
 
-# Remove Cargo.lock from gitignore if creating an executable, leave it for libraries
+# 预生成的 proto Rust 代码（提交到仓库，但用户不应修改）
-# More information here https://doc.rust-lang.org/cargo/guide/cargo-toml-vs-cargo-lock.html
+# /src/swqos/pb/serverpb.rs  <- 这个文件已经提交，用户不应修改
+
+# Build artifacts
+/target/
 Cargo.lock
 
-# These are backup files generated by rustfmt
+# Proto sources
-**/*.rs.bk
+/proto/
-
-# MSVC Windows builds of rustc generate these, which store debugging information
-*.pdb
-
-# RustRover
-#  JetBrains specific template is maintained in a separate JetBrains.gitignore that can
-#  be found at https://github.com/github/gitignore/blob/main/Global/JetBrains.gitignore
-#  and can be added to the global gitignore or merged into this file.  For a more nuclear
-#  option (not recommended) you can uncomment the following to ignore the entire idea folder.
-#.idea/
-
-.cargo/
-
-tmp_*.rs
-tmp_*.log
-
-
-.claude/
-.serena/

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "sol-trade-sdk"
-version = "3.6.5"
+version = "4.0.0"
 edition = "2021"
 authors = [
     "William <byteblock6@gmail.com>",
@@ -135,6 +135,10 @@ incremental = true         # 增量编译 - 大幅加速重新编译
 opt-level = 1              # 开发时适度优化
 overflow-checks = true     # 开发时启用溢出检查
 
+# 🚀 构建依赖
+# 注意：proto 代码已预生成在 src/swqos/pb/serverpb.rs
+# 开发者如需重新生成代码，请运行 gen_proto 目录下的工具
+
 # 🚀 性能关键依赖的特殊优化
 [profile.release.package.solana-sdk]
 opt-level = 3

README.md

@@ -90,14 +90,14 @@ Add the dependency to your `Cargo.toml`:
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = { path = "./sol-trade-sdk", version = "3.6.5" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.0" }
 ```
 
 ### Use crates.io
 
 ```toml
 # Add to your Cargo.toml
-sol-trade-sdk = "3.6.5"
+sol-trade-sdk = "4.0.0"
 ```
 
 ## 🛠️ Usage Examples

README_CN.md

@@ -90,14 +90,14 @@ 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 = "3.6.5" }
+sol-trade-sdk = { path = "./sol-trade-sdk", version = "4.0.0" }
 ```
 
 ### 使用 crates.io
 
 ```toml
 # 添加到您的 Cargo.toml
-sol-trade-sdk = "3.6.5"
+sol-trade-sdk = "4.0.0"
 ```
 
 ## 🛠️ 使用示例

RELEASE_v3.6.4.md

@@ -1,8 +0,0 @@
-# Release v3.6.4
-
-## Changes from v3.6.3
-
-- **Examples**: All workspace examples are verified to build successfully (`cargo build --workspace`).
-- **Docs**: Version references in README.md and README_CN.md updated to 3.6.4.
-
-No API or behavior changes in this release.

src/swqos/blockrazor.rs

@@ -17,60 +17,66 @@ use crate::{common::SolanaRpcClient, constants::swqos::BLOCKRAZOR_TIP_ACCOUNTS};
 
 use std::sync::atomic::{AtomicBool, Ordering};
 use tokio::task::JoinHandle;
-use tonic::metadata::AsciiMetadataValue;
 use tonic::transport::Channel;
+use tonic::metadata::AsciiMetadataValue;
 
-// Manual gRPC message types for BlockRazor serverpb.proto
+// Include pre-generated gRPC code
-#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+pub mod serverpb {
-pub struct HealthRequest {}
+    include!("pb/serverpb.rs");
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct HealthResponse {
-    pub status: String,
 }
 
-#[derive(Debug, Clone, PartialEq, Eq)]
+// gRPC client wrapper
-pub struct SendRequest {
-    pub transaction: String,
-    pub mode: String,
-    pub safe_window: Option<i32>,
-    pub revert_protection: bool,
-}
-
-#[derive(Debug, Clone, PartialEq, Eq)]
-pub struct SendResponse {
-    pub signature: String,
-}
-
-// Mock gRPC client using tonic
 #[derive(Clone)]
 pub struct BlockRazorGrpcClient {
     channel: Channel,
+    auth_token: String,
 }
 
 impl BlockRazorGrpcClient {
-    pub fn new(channel: Channel) -> Self {
+    pub fn new(channel: Channel, auth_token: String) -> Self {
-        Self { channel }
+        Self { channel, auth_token }
     }
 
-    pub async fn get_health(&self) -> Result<HealthResponse> {
+    pub async fn get_health(&self) -> Result<String> {
-        // For now, use a simple HTTP request for health check
+        let mut client = serverpb::server_client::ServerClient::new(self.channel.clone());
-        let http_client = Client::new();
+        let apikey = AsciiMetadataValue::try_from(self.auth_token.as_str())
-        let response = http_client
+            .map_err(|e| anyhow::anyhow!("Invalid API key format: {}", e))?;
-            .get("http://health.example.com") // Placeholder
+
-            .send()
+        let mut request = tonic::Request::new(serverpb::HealthRequest {});
-            .await;
+        request.metadata_mut().insert("apikey", apikey);
-        Ok(HealthResponse {
+
-            status: "ok".to_string(),
+        let response = client.get_health(request).await
-        })
+            .map_err(|e| anyhow::anyhow!("gRPC health check failed: {}", e))?;
+        Ok(response.into_inner().status)
     }
 
-    pub async fn send_transaction(&self, _request: SendRequest) -> Result<SendResponse> {
+    pub async fn send_transaction(
-        // For now, this is a placeholder implementation
+        &self,
-        // Real implementation would use tonic-generated client
+        transaction: String,
-        Ok(SendResponse {
+        mode: String,
-            signature: "placeholder".to_string(),
+        safe_window: Option<i32>,
-        })
+        revert_protection: bool,
+    ) -> Result<String> {
+        // 检查交易数据大小
+        if crate::common::sdk_log::sdk_log_enabled() {
+            eprintln!("BlockRazor transaction size: {} bytes", transaction.len());
+        }
+
+        let mut client = serverpb::server_client::ServerClient::new(self.channel.clone());
+        let apikey = AsciiMetadataValue::try_from(self.auth_token.as_str())
+            .map_err(|e| anyhow::anyhow!("Invalid API key format: {}", e))?;
+
+        let mut request = tonic::Request::new(serverpb::SendRequest {
+            transaction,
+            mode: String::from(mode),
+            safe_window,
+            revert_protection,
+        });
+        request.metadata_mut().insert("apikey", apikey);
+
+        let response = client.send_transaction(request).await
+            .map_err(|e| anyhow::anyhow!("gRPC send transaction failed: {}", e))?;
+        Ok(response.into_inner().signature)
     }
 }
 
@@ -135,22 +141,23 @@ impl SwqosClientTrait for BlockRazorClient {
 }
 
 impl BlockRazorClient {
-    /// 使用 gRPC 提交（默认方式）。
     pub async fn new(rpc_url: String, endpoint: String, auth_token: String) -> Result<Self> {
-        Self::new_grpc(rpc_url, endpoint, auth_token).await
+        // 默认使用 HTTP 模式，避免 gRPC FRAME_SIZE_ERROR
+        Ok(Self::new_http(rpc_url, endpoint, auth_token))
     }
 
-    /// 使用 gRPC 提交。
     pub async fn new_grpc(rpc_url: String, endpoint: String, auth_token: String) -> Result<Self> {
         let rpc_client = SolanaRpcClient::new(rpc_url);
 
+        // 配置 Channel，增加连接超时
         let channel = tonic::transport::Channel::from_shared(endpoint.clone())
             .map_err(|e| anyhow::anyhow!("Invalid gRPC endpoint: {}", e))?
+            .timeout(Duration::from_secs(30))
             .connect()
             .await
             .map_err(|e| anyhow::anyhow!("Failed to connect to gRPC endpoint: {}", e))?;
 
-        let grpc_client = Arc::new(BlockRazorGrpcClient::new(channel));
+        let grpc_client = Arc::new(BlockRazorGrpcClient::new(channel, auth_token.clone()));
         let ping_handle = Arc::new(tokio::sync::Mutex::new(None));
         let stop_ping = Arc::new(AtomicBool::new(false));
 
@@ -173,10 +180,8 @@ impl BlockRazorClient {
         Ok(client)
     }
 
-    /// 使用 HTTP 提交。
     pub fn new_http(rpc_url: String, endpoint: String, auth_token: String) -> Self {
         let rpc_client = SolanaRpcClient::new(rpc_url);
-        // 官方文档：請求中唯一允許的 header 是 Content-Type: text/plain；避免默认 User-Agent 等导致 500
         let http_client = default_http_client_builder().user_agent("").build().unwrap();
         let ping_handle = Arc::new(tokio::sync::Mutex::new(None));
         let stop_ping = Arc::new(AtomicBool::new(false));
@@ -213,13 +218,12 @@ impl BlockRazorClient {
                 let stop_ping = stop_ping.clone();
 
                 let handle = tokio::spawn(async move {
-                    // Immediate first ping to warm connection and reduce first-submit cold start latency
                     if let Err(e) = grpc_client.get_health().await {
                         if crate::common::sdk_log::sdk_log_enabled() {
                             eprintln!("BlockRazor gRPC ping request failed: {}", e);
                         }
                     }
-                    let mut interval = tokio::time::interval(Duration::from_secs(30)); // 30s keepalive to avoid server ~5min idle close
+                    let mut interval = tokio::time::interval(Duration::from_secs(30));
                     loop {
                         interval.tick().await;
                         if stop_ping.load(Ordering::Relaxed) {
@@ -253,13 +257,12 @@ impl BlockRazorClient {
                 let stop_ping = stop_ping.clone();
 
                 let handle = tokio::spawn(async move {
-                    // Immediate first ping to warm connection and reduce first-submit cold start latency
                     if let Err(e) = Self::send_http_ping(&http_client, &endpoint, &auth_token).await {
                         if crate::common::sdk_log::sdk_log_enabled() {
                             eprintln!("BlockRazor HTTP ping request failed: {}", e);
                         }
                     }
-                    let mut interval = tokio::time::interval(Duration::from_secs(30)); // 30s keepalive to avoid server ~5min idle close
+                    let mut interval = tokio::time::interval(Duration::from_secs(30));
                     loop {
                         interval.tick().await;
                         if stop_ping.load(Ordering::Relaxed) {
@@ -282,7 +285,6 @@ impl BlockRazorClient {
         }
     }
 
-    /// Send HTTP ping request: POST /v2/health?auth=... (Keep Alive). Only required param: auth.
     async fn send_http_ping(
         http_client: &Client,
         endpoint: &str,
@@ -315,24 +317,21 @@ impl BlockRazorClient {
 
         match &self.backend {
             BlockRazorBackend::Grpc {
-                auth_token,
                 grpc_client,
                 ..
             } => {
                 let (content, _signature) =
                     serialize_transaction_and_encode(transaction, UiTransactionEncoding::Base64)?;
 
-                let request = SendRequest {
+                let signature = grpc_client.send_transaction(
-                    transaction: content,
+                    content,
-                    mode: "fast".to_string(),
+                    "fast".to_string(),
-                    safe_window: None,
+                    None,
-                    revert_protection: false,
+                    false,
-                };
+                ).await;
-
+                match signature {
-                let response = grpc_client.send_transaction(request).await;
+                    Ok(sig) => {
-                match response {
+                        if !sig.is_empty() {
-                    Ok(resp) => {
-                        if !resp.signature.is_empty() {
                             if crate::common::sdk_log::sdk_log_enabled() {
                                 crate::common::sdk_log::log_swqos_submitted("BlockRazor", trade_type, start_time.elapsed());
                             }
@@ -389,7 +388,6 @@ impl BlockRazorClient {
         }
 
         let start_time = Instant::now();
-        // Get signature from transaction
         let signature = transaction.signatures[0];
 
         match poll_transaction_confirmation(&self.rpc_client, signature, wait_confirmation).await {

src/swqos/mod.rs

@@ -352,14 +352,16 @@ impl SwqosConfig {
                 Ok(Arc::new(flashblock_client))
             }
             SwqosConfig::BlockRazor(auth_token, region, url, transport) => {
-                let use_http = transport.map_or(false, |t| t == SwqosTransport::Http);
+                // BlockRazor: transport=None 或 transport=Http 时使用 HTTP，否则使用 gRPC
+                // 默认使用 HTTP，避免 gRPC FRAME_SIZE_ERROR
+                let use_http = transport.map_or(true, |t| t == SwqosTransport::Http);
                 if use_http {
                     let endpoint = SwqosConfig::get_endpoint(SwqosType::BlockRazor, region, url);
                     let blockrazor_client =
                         BlockRazorClient::new_http(rpc_url.clone(), endpoint.to_string(), auth_token);
                     Ok(Arc::new(blockrazor_client))
                 } else {
-                    // Default to gRPC
+                    // 使用 gRPC 模式（用户明确指定了非 Http 的 transport）
                     let endpoint = SwqosConfig::get_endpoint(SwqosType::BlockRazor, region, url);
                     let blockrazor_client =
                         BlockRazorClient::new_grpc(rpc_url.clone(), endpoint.to_string(), auth_token).await?;

src/swqos/pb/README.md

@@ -0,0 +1,42 @@
+# Proto 生成的代码说明
+
+## 概述
+
+这个目录包含了从 `.proto` 文件预生成的 Rust 代码。
+
+## 文件说明
+
+- `serverpb.rs` - 从 `blockrazor.proto` 生成的 gRPC 代码
+  - 消息类型: `SendRequest`, `SendResponse`, `HealthRequest`, `HealthResponse`
+  - gRPC 客户端: `server_client::ServerClient`
+  - gRPC 服务端: `server_server::Server`
+
+## 用户使用
+
+用户**不需要**安装 `protoc` 或编译 proto 文件。这些代码已经预生成好了，可以直接使用。
+
+在 `blockrazor.rs` 中使用：
+```rust
+pub mod serverpb {
+    include!("pb/serverpb.rs");
+}
+```
+
+## 开发者如何重新生成代码
+
+如果你修改了 `.proto` 文件并需要重新生成代码：
+
+```bash
+cd sol-trade-sdk/proto/gen
+cargo run
+```
+
+这会在 `src/swqos/pb/serverpb.rs` 生成新的代码。
+
+## 技术细节
+
+生成工具使用 `tonic-prost-build` crate：
+- 输出目录: `src/swqos/pb`
+- Proto 文件: `proto/blockrazor.proto`
+- 生成工具: `proto/gen/`
+- 包含完整的客户端和服务端代码

src/swqos/pb/serverpb.rs

@@ -0,0 +1,383 @@
+// This file is @generated by prost-build.
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct SendRequest {
+    #[prost(string, tag = "1")]
+    pub transaction: ::prost::alloc::string::String,
+    #[prost(string, tag = "2")]
+    pub mode: ::prost::alloc::string::String,
+    /// only take effect in sandwichMitigation mode
+    #[prost(int32, optional, tag = "3")]
+    pub safe_window: ::core::option::Option<i32>,
+    #[prost(bool, tag = "4")]
+    pub revert_protection: bool,
+}
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct SendResponse {
+    #[prost(string, tag = "1")]
+    pub signature: ::prost::alloc::string::String,
+}
+#[derive(Clone, Copy, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct HealthRequest {}
+#[derive(Clone, PartialEq, Eq, Hash, ::prost::Message)]
+pub struct HealthResponse {
+    #[prost(string, tag = "1")]
+    pub status: ::prost::alloc::string::String,
+}
+/// Generated client implementations.
+pub mod server_client {
+    #![allow(
+        unused_variables,
+        dead_code,
+        missing_docs,
+        clippy::wildcard_imports,
+        clippy::let_unit_value,
+    )]
+    use tonic::codegen::*;
+    use tonic::codegen::http::Uri;
+    #[derive(Debug, Clone)]
+    pub struct ServerClient<T> {
+        inner: tonic::client::Grpc<T>,
+    }
+    impl ServerClient<tonic::transport::Channel> {
+        /// Attempt to create a new client by connecting to a given endpoint.
+        pub async fn connect<D>(dst: D) -> Result<Self, tonic::transport::Error>
+        where
+            D: TryInto<tonic::transport::Endpoint>,
+            D::Error: Into<StdError>,
+        {
+            let conn = tonic::transport::Endpoint::new(dst)?.connect().await?;
+            Ok(Self::new(conn))
+        }
+    }
+    impl<T> ServerClient<T>
+    where
+        T: tonic::client::GrpcService<tonic::body::Body>,
+        T::Error: Into<StdError>,
+        T::ResponseBody: Body<Data = Bytes> + std::marker::Send + 'static,
+        <T::ResponseBody as Body>::Error: Into<StdError> + std::marker::Send,
+    {
+        pub fn new(inner: T) -> Self {
+            let inner = tonic::client::Grpc::new(inner);
+            Self { inner }
+        }
+        pub fn with_origin(inner: T, origin: Uri) -> Self {
+            let inner = tonic::client::Grpc::with_origin(inner, origin);
+            Self { inner }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> ServerClient<InterceptedService<T, F>>
+        where
+            F: tonic::service::Interceptor,
+            T::ResponseBody: Default,
+            T: tonic::codegen::Service<
+                http::Request<tonic::body::Body>,
+                Response = http::Response<
+                    <T as tonic::client::GrpcService<tonic::body::Body>>::ResponseBody,
+                >,
+            >,
+            <T as tonic::codegen::Service<
+                http::Request<tonic::body::Body>,
+            >>::Error: Into<StdError> + std::marker::Send + std::marker::Sync,
+        {
+            ServerClient::new(InterceptedService::new(inner, interceptor))
+        }
+        /// Compress requests with the given encoding.
+        ///
+        /// This requires the server to support it otherwise it might respond with an
+        /// error.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.send_compressed(encoding);
+            self
+        }
+        /// Enable decompressing responses.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.inner = self.inner.accept_compressed(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_decoding_message_size(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.inner = self.inner.max_encoding_message_size(limit);
+            self
+        }
+        pub async fn send_transaction(
+            &mut self,
+            request: impl tonic::IntoRequest<super::SendRequest>,
+        ) -> std::result::Result<tonic::Response<super::SendResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::unknown(
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic_prost::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/serverpb.Server/SendTransaction",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut()
+                .insert(GrpcMethod::new("serverpb.Server", "SendTransaction"));
+            self.inner.unary(req, path, codec).await
+        }
+        pub async fn get_health(
+            &mut self,
+            request: impl tonic::IntoRequest<super::HealthRequest>,
+        ) -> std::result::Result<tonic::Response<super::HealthResponse>, tonic::Status> {
+            self.inner
+                .ready()
+                .await
+                .map_err(|e| {
+                    tonic::Status::unknown(
+                        format!("Service was not ready: {}", e.into()),
+                    )
+                })?;
+            let codec = tonic_prost::ProstCodec::default();
+            let path = http::uri::PathAndQuery::from_static(
+                "/serverpb.Server/GetHealth",
+            );
+            let mut req = request.into_request();
+            req.extensions_mut().insert(GrpcMethod::new("serverpb.Server", "GetHealth"));
+            self.inner.unary(req, path, codec).await
+        }
+    }
+}
+/// Generated server implementations.
+pub mod server_server {
+    #![allow(
+        unused_variables,
+        dead_code,
+        missing_docs,
+        clippy::wildcard_imports,
+        clippy::let_unit_value,
+    )]
+    use tonic::codegen::*;
+    /// Generated trait containing gRPC methods that should be implemented for use with ServerServer.
+    #[async_trait]
+    pub trait Server: std::marker::Send + std::marker::Sync + 'static {
+        async fn send_transaction(
+            &self,
+            request: tonic::Request<super::SendRequest>,
+        ) -> std::result::Result<tonic::Response<super::SendResponse>, tonic::Status>;
+        async fn get_health(
+            &self,
+            request: tonic::Request<super::HealthRequest>,
+        ) -> std::result::Result<tonic::Response<super::HealthResponse>, tonic::Status>;
+    }
+    #[derive(Debug)]
+    pub struct ServerServer<T> {
+        inner: Arc<T>,
+        accept_compression_encodings: EnabledCompressionEncodings,
+        send_compression_encodings: EnabledCompressionEncodings,
+        max_decoding_message_size: Option<usize>,
+        max_encoding_message_size: Option<usize>,
+    }
+    impl<T> ServerServer<T> {
+        pub fn new(inner: T) -> Self {
+            Self::from_arc(Arc::new(inner))
+        }
+        pub fn from_arc(inner: Arc<T>) -> Self {
+            Self {
+                inner,
+                accept_compression_encodings: Default::default(),
+                send_compression_encodings: Default::default(),
+                max_decoding_message_size: None,
+                max_encoding_message_size: None,
+            }
+        }
+        pub fn with_interceptor<F>(
+            inner: T,
+            interceptor: F,
+        ) -> InterceptedService<Self, F>
+        where
+            F: tonic::service::Interceptor,
+        {
+            InterceptedService::new(Self::new(inner), interceptor)
+        }
+        /// Enable decompressing requests with the given encoding.
+        #[must_use]
+        pub fn accept_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.accept_compression_encodings.enable(encoding);
+            self
+        }
+        /// Compress responses with the given encoding, if the client supports it.
+        #[must_use]
+        pub fn send_compressed(mut self, encoding: CompressionEncoding) -> Self {
+            self.send_compression_encodings.enable(encoding);
+            self
+        }
+        /// Limits the maximum size of a decoded message.
+        ///
+        /// Default: `4MB`
+        #[must_use]
+        pub fn max_decoding_message_size(mut self, limit: usize) -> Self {
+            self.max_decoding_message_size = Some(limit);
+            self
+        }
+        /// Limits the maximum size of an encoded message.
+        ///
+        /// Default: `usize::MAX`
+        #[must_use]
+        pub fn max_encoding_message_size(mut self, limit: usize) -> Self {
+            self.max_encoding_message_size = Some(limit);
+            self
+        }
+    }
+    impl<T, B> tonic::codegen::Service<http::Request<B>> for ServerServer<T>
+    where
+        T: Server,
+        B: Body + std::marker::Send + 'static,
+        B::Error: Into<StdError> + std::marker::Send + 'static,
+    {
+        type Response = http::Response<tonic::body::Body>;
+        type Error = std::convert::Infallible;
+        type Future = BoxFuture<Self::Response, Self::Error>;
+        fn poll_ready(
+            &mut self,
+            _cx: &mut Context<'_>,
+        ) -> Poll<std::result::Result<(), Self::Error>> {
+            Poll::Ready(Ok(()))
+        }
+        fn call(&mut self, req: http::Request<B>) -> Self::Future {
+            match req.uri().path() {
+                "/serverpb.Server/SendTransaction" => {
+                    #[allow(non_camel_case_types)]
+                    struct SendTransactionSvc<T: Server>(pub Arc<T>);
+                    impl<T: Server> tonic::server::UnaryService<super::SendRequest>
+                    for SendTransactionSvc<T> {
+                        type Response = super::SendResponse;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::SendRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Server>::send_transaction(&inner, request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = SendTransactionSvc(inner);
+                        let codec = tonic_prost::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                "/serverpb.Server/GetHealth" => {
+                    #[allow(non_camel_case_types)]
+                    struct GetHealthSvc<T: Server>(pub Arc<T>);
+                    impl<T: Server> tonic::server::UnaryService<super::HealthRequest>
+                    for GetHealthSvc<T> {
+                        type Response = super::HealthResponse;
+                        type Future = BoxFuture<
+                            tonic::Response<Self::Response>,
+                            tonic::Status,
+                        >;
+                        fn call(
+                            &mut self,
+                            request: tonic::Request<super::HealthRequest>,
+                        ) -> Self::Future {
+                            let inner = Arc::clone(&self.0);
+                            let fut = async move {
+                                <T as Server>::get_health(&inner, request).await
+                            };
+                            Box::pin(fut)
+                        }
+                    }
+                    let accept_compression_encodings = self.accept_compression_encodings;
+                    let send_compression_encodings = self.send_compression_encodings;
+                    let max_decoding_message_size = self.max_decoding_message_size;
+                    let max_encoding_message_size = self.max_encoding_message_size;
+                    let inner = self.inner.clone();
+                    let fut = async move {
+                        let method = GetHealthSvc(inner);
+                        let codec = tonic_prost::ProstCodec::default();
+                        let mut grpc = tonic::server::Grpc::new(codec)
+                            .apply_compression_config(
+                                accept_compression_encodings,
+                                send_compression_encodings,
+                            )
+                            .apply_max_message_size_config(
+                                max_decoding_message_size,
+                                max_encoding_message_size,
+                            );
+                        let res = grpc.unary(method, req).await;
+                        Ok(res)
+                    };
+                    Box::pin(fut)
+                }
+                _ => {
+                    Box::pin(async move {
+                        let mut response = http::Response::new(
+                            tonic::body::Body::default(),
+                        );
+                        let headers = response.headers_mut();
+                        headers
+                            .insert(
+                                tonic::Status::GRPC_STATUS,
+                                (tonic::Code::Unimplemented as i32).into(),
+                            );
+                        headers
+                            .insert(
+                                http::header::CONTENT_TYPE,
+                                tonic::metadata::GRPC_CONTENT_TYPE,
+                            );
+                        Ok(response)
+                    })
+                }
+            }
+        }
+    }
+    impl<T> Clone for ServerServer<T> {
+        fn clone(&self) -> Self {
+            let inner = self.inner.clone();
+            Self {
+                inner,
+                accept_compression_encodings: self.accept_compression_encodings,
+                send_compression_encodings: self.send_compression_encodings,
+                max_decoding_message_size: self.max_decoding_message_size,
+                max_encoding_message_size: self.max_encoding_message_size,
+            }
+        }
+    }
+    /// Generated gRPC service name
+    pub const SERVICE_NAME: &str = "serverpb.Server";
+    impl<T> tonic::server::NamedService for ServerServer<T> {
+        const NAME: &'static str = SERVICE_NAME;
+    }
+}

src/swqos/zeroslot.rs

@@ -167,18 +167,33 @@ impl ZeroSlotClient {
         let status = response.status();
         let response_text = response.text().await?;
 
-        // Binary-Tx returns plain text responses with specific status codes
+        // Binary-Tx returns JSON-RPC 2.0 format responses
-        // 200: ok - transaction submitted successfully
+        // 200: success with result field containing signature, or error field with code/message
         // 403: api-key error (null, doesn't exist, or expired)
         // 419: rate limit exceeded
         // 500: submission failed
         match status.as_u16() {
             200 => {
-                if response_text.trim() == "ok" {
+                if let Ok(json_value) = serde_json::from_str::<serde_json::Value>(&response_text) {
-                    crate::common::sdk_log::log_swqos_submitted("0slot", trade_type, start_time.elapsed());
+                    if json_value.get("result").is_some() {
+                        crate::common::sdk_log::log_swqos_submitted("0slot", trade_type, start_time.elapsed());
+                    } else if let Some(error) = json_value.get("error") {
+                        let code = error.get("code")
+                            .and_then(|c| c.as_i64())
+                            .map(|c| c.to_string())
+                            .unwrap_or_else(|| "unknown".to_string());
+                        let message = error.get("message")
+                            .and_then(|m| m.as_str())
+                            .unwrap_or("unknown error");
+                        crate::common::sdk_log::log_swqos_submission_failed("0slot", trade_type, start_time.elapsed(), format!("code {}: {}", code, message));
+                        return Err(anyhow::anyhow!("0slot Binary-Tx error: {}", message));
+                    } else {
+                        crate::common::sdk_log::log_swqos_submission_failed("0slot", trade_type, start_time.elapsed(), format!("unexpected JSON: {}", response_text));
+                        return Err(anyhow::anyhow!("0slot Binary-Tx unexpected JSON: {}", response_text));
+                    }
                 } else {
-                    crate::common::sdk_log::log_swqos_submission_failed("0slot", trade_type, start_time.elapsed(), format!("unexpected response: {}", response_text));
+                    crate::common::sdk_log::log_swqos_submission_failed("0slot", trade_type, start_time.elapsed(), format!("invalid JSON: {}", response_text));
-                    return Err(anyhow::anyhow!("0slot Binary-Tx unexpected response: {}", response_text));
+                    return Err(anyhow::anyhow!("0slot Binary-Tx invalid JSON: {}", response_text));
                 }
             }
             403 => {