RPC client for fetching tx lists

Node/Cargo.toml

@@ -8,4 +8,9 @@ edition = "2021"
 [dependencies]
 tokio = { version = "1.38", features = ["full"] }
 tracing = "0.1.40"
-tracing-subscriber = "0.3"
+tracing-subscriber = "0.3"
+jsonrpsee = { version = "0.23", features = ["http-client", "server"] }
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+lazy_static = "1.4"
+anyhow = "1.0.86"

Node/src/main.rs

@@ -3,13 +3,15 @@ mod mev_boost;
 mod node;
 mod p2p_network;
 mod taiko;
+mod utils;
 
+use anyhow::Error;
 use tokio::sync::mpsc;
 
 const MESSAGE_QUEUE_SIZE: usize = 100;
 
 #[tokio::main]
-async fn main() {
+async fn main() -> Result<(), Error> {
     init_logging();
 
     let (avs_p2p_tx, avs_p2p_rx) = mpsc::channel(MESSAGE_QUEUE_SIZE);
@@ -18,7 +20,8 @@ async fn main() {
     p2p.start();
 
     let node = node::Node::new(node_rx, avs_p2p_tx);
-    node.start();
+    node.entrypoint().await?;
+    Ok(())
 }
 
 fn init_logging() {

Node/src/node/mod.rs

@@ -1,72 +1,67 @@
 use crate::taiko::Taiko;
+use anyhow::{anyhow as err, Context, Error};
 use tokio::sync::mpsc::{Receiver, Sender};
 
 pub struct Node {
     taiko: Taiko,
-    node_rx: Option<Receiver<String>>,
+    node_rx: Receiver<String>,
     avs_p2p_tx: Sender<String>,
 }
 
 impl Node {
     pub fn new(node_rx: Receiver<String>, avs_p2p_tx: Sender<String>) -> Self {
-        let taiko = Taiko::new();
+        let taiko = Taiko::new("http://127.0.0.1:1234");
         Self {
             taiko,
-            node_rx: Some(node_rx),
+            node_rx,
             avs_p2p_tx,
         }
     }
 
     /// Consumes the Node and starts two loops:
     /// one for handling incoming messages and one for the block preconfirmation
-    pub fn start(mut self) {
+    pub async fn entrypoint(mut self) -> Result<(), Error> {
         tracing::info!("Starting node");
-        self.start_new_msg_receiver_thread();
-        self.main_block_preconfirmation_loop()
-    }
-
-    fn main_block_preconfirmation_loop(&self) {
         loop {
-            self.taiko.get_pending_l2_tx_lists();
-            self.commit_to_the_tx_lists();
-            self.send_preconfirmations_to_the_avs_p2p();
-            self.taiko.submit_new_l2_blocks();
+            if let Err(err) = self.step().await {
+                tracing::error!("Node processing step failed: {}", err);
+            }
+        }
+    }
 
-            //TODO: remove after implementation of above methods
-            std::thread::sleep(std::time::Duration::from_secs(1));
+    async fn step(&mut self) -> Result<(), Error> {
+        if let Ok(msg) = self.node_rx.try_recv() {
+            self.process_incoming_message(msg).await?;
+        } else {
+            self.main_block_preconfirmation_step().await?;
         }
+        Ok(())
     }
 
-    fn commit_to_the_tx_lists(&self) {
-        //TODO: implement
+    async fn main_block_preconfirmation_step(&self) -> Result<(), Error> {
+        self.taiko
+            .get_pending_l2_tx_lists()
+            .await
+            .context("Failed to get pending l2 tx lists")?;
+        self.commit_to_the_tx_lists();
+        self.send_preconfirmations_to_the_avs_p2p().await?;
+        self.taiko.submit_new_l2_blocks();
+        Ok(())
     }
 
-    fn send_preconfirmations_to_the_avs_p2p(&self) {
-        let avs_p2p_tx = self.avs_p2p_tx.clone();
-        tokio::spawn(async move {
-            if let Err(e) = avs_p2p_tx.send("Hello from node!".to_string()).await {
-                tracing::error!("Failed to send message to avs_p2p_tx: {}", e);
-            }
-        });
+    async fn process_incoming_message(&mut self, msg: String) -> Result<(), Error> {
+        tracing::debug!("Node received message: {}", msg);
+        Ok(())
     }
 
-    fn start_new_msg_receiver_thread(&mut self) {
-        if let Some(node_rx) = self.node_rx.take() {
-            tokio::spawn(async move {
-                Self::handle_incoming_messages(node_rx).await;
-            });
-        } else {
-            tracing::error!("node_rx has already been moved");
-        }
+    fn commit_to_the_tx_lists(&self) {
+        //TODO: implement
     }
 
-    async fn handle_incoming_messages(mut node_rx: Receiver<String>) {
-        loop {
-            tokio::select! {
-                Some(message) = node_rx.recv() => {
-                    tracing::debug!("Node received message: {}", message);
-                }
-            }
-        }
+    async fn send_preconfirmations_to_the_avs_p2p(&self) -> Result<(), Error> {
+        self.avs_p2p_tx
+            .send("Hello from node!".to_string())
+            .await
+            .map_err(|e| err!("Failed to send message to avs_p2p_tx: {}", e))
     }
 }

Node/src/taiko/mod.rs

@@ -1,15 +1,56 @@
-pub struct Taiko {}
+use crate::utils::rpc_client::RpcClient;
+use anyhow::Error;
+use serde_json::Value;
+
+pub struct Taiko {
+    rpc_client: RpcClient,
+}
 
 impl Taiko {
-    pub fn new() -> Self {
-        Self {}
+    pub fn new(url: &str) -> Self {
+        Self {
+            rpc_client: RpcClient::new(url),
+        }
     }
 
-    pub fn get_pending_l2_tx_lists(&self) {
+    pub async fn get_pending_l2_tx_lists(&self) -> Result<Value, Error> {
         tracing::debug!("Getting L2 tx lists");
+        self.rpc_client
+            .call_method("RPC.GetL2TxLists", vec![])
+            .await
     }
 
     pub fn submit_new_l2_blocks(&self) {
         tracing::debug!("Submitting new L2 blocks");
     }
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+    use crate::utils::rpc_server::test::RpcServer;
+    use std::net::SocketAddr;
+
+    #[tokio::test]
+    async fn test_get_pending_l2_tx_lists() {
+        tracing_subscriber::fmt::init();
+
+        // Start the RPC server
+        let mut rpc_server = RpcServer::new();
+        let addr: SocketAddr = "127.0.0.1:3030".parse().unwrap();
+        rpc_server.start_test_responses(addr).await.unwrap();
+
+        let taiko = Taiko::new("http://127.0.0.1:3030");
+        let json = taiko.get_pending_l2_tx_lists().await.unwrap();
+
+        assert_eq!(json["result"]["TxLists"].as_array().unwrap().len(), 1);
+        assert_eq!(json["result"]["TxLists"][0].as_array().unwrap().len(), 3);
+        assert_eq!(json["result"]["TxLists"][0][0]["type"], "0x0");
+        assert_eq!(json["result"]["TxLists"][0][0]["hash"], "0x7c76b9906579e54df54fe77ad1706c47aca706b3eb5cfd8a30ccc3c5a19e8ecd");
+        assert_eq!(json["result"]["TxLists"][0][1]["type"], "0x2");
+        assert_eq!(json["result"]["TxLists"][0][1]["hash"], "0xece2a3c6ca097cfe5d97aad4e79393240f63865210f9c763703d1136f065298b");
+        assert_eq!(json["result"]["TxLists"][0][2]["type"], "0x2");
+        assert_eq!(json["result"]["TxLists"][0][2]["hash"], "0xb105d9f16e8fb913093c8a2c595bf4257328d256f218a05be8dcc626ddeb4193");
+        rpc_server.stop().await;
+    }
+}

Node/src/utils/mod.rs

@@ -0,0 +1,2 @@
+pub mod rpc_client;
+pub mod rpc_server;

Node/src/utils/rpc_client.rs

@@ -0,0 +1,28 @@
+use anyhow::Error;
+use jsonrpsee::core::client::ClientT;
+use jsonrpsee::http_client::{HttpClient, HttpClientBuilder};
+use serde_json::Value;
+use std::time::Duration;
+
+pub struct RpcClient {
+    client: HttpClient,
+}
+
+impl RpcClient {
+    pub fn new(url: &str) -> Self {
+        // let client = HttpClientBuilder::default().build(url).unwrap();
+
+        let client = HttpClientBuilder::default()
+            .request_timeout(Duration::from_secs(1))
+            .build(url)
+            .unwrap();
+        RpcClient { client }
+    }
+
+    pub async fn call_method(&self, method: &str, params: Vec<Value>) -> Result<Value, Error> {
+        self.client
+            .request(method, params)
+            .await
+            .map_err(Error::from)
+    }
+}

Node/src/utils/rpc_server.rs

@@ -0,0 +1,112 @@
+#[cfg(test)]
+pub mod test {
+    use jsonrpsee::server::{ServerBuilder, ServerHandle};
+    use jsonrpsee::RpcModule;
+    use lazy_static::lazy_static;
+    use serde_json::json;
+    use std::net::SocketAddr;
+    use tracing::info;
+
+    pub struct RpcServer {
+        handle: Option<ServerHandle>,
+    }
+
+    impl RpcServer {
+        pub fn new() -> Self {
+            RpcServer {
+                handle: None::<ServerHandle>,
+            }
+        }
+
+        #[cfg(test)]
+        pub async fn start_test_responses(
+            &mut self,
+            addr: SocketAddr,
+        ) -> Result<(), Box<dyn std::error::Error>> {
+            let server = ServerBuilder::default().build(addr).await?;
+            let mut module = RpcModule::new(());
+
+            module.register_async_method("RPC.GetL2TxLists", |_, _, _| async {
+                TX_LISTS_RESPONSE.clone()
+            })?;
+
+            let handle = server.start(module);
+            tokio::spawn(handle.clone().stopped());
+
+            self.handle = Some(handle);
+            Ok(())
+        }
+
+        pub async fn stop(&mut self) {
+            if let Some(handle) = self.handle.take() {
+                handle.stop().unwrap();
+            }
+            info!("Server stopped");
+        }
+    }
+
+    lazy_static! {
+        pub static ref TX_LISTS_RESPONSE: serde_json::Value = json!({
+            "result": {
+                "TxLists": [
+                    [
+                        {
+                            "type": "0x0",
+                            "chainId": "0x28c61",
+                            "nonce": "0x1",
+                            "to": "0xbfadd5365bb2890ad832038837115e60b71f7cbb",
+                            "gas": "0x267ac",
+                            "gasPrice": "0x5e76e0800",
+                            "maxPriorityFeePerGas": null,
+                            "maxFeePerGas": null,
+                            "value": "0x0",
+                            "input": "0x40d097c30000000000000000000000004cea2c7d358e313f5d0287c475f9ae943fe1a913",
+                            "v": "0x518e6",
+                            "r": "0xb22da5cdc4c091ec85d2dda9054aa497088e55bd9f0335f39864ae1c598dd35",
+                            "s": "0x6eee1bcfe6a1855e89dd23d40942c90a036f273159b4c4fd217d58169493f055",
+                            "hash": "0x7c76b9906579e54df54fe77ad1706c47aca706b3eb5cfd8a30ccc3c5a19e8ecd"
+                        },
+                        {
+                            "type": "0x2",
+                            "chainId": "0x28c61",
+                            "nonce": "0x3f",
+                            "to": "0x380a5ba81efe70fe98ab56613ebf9244a2f3d4c9",
+                            "gas": "0x2c2c8",
+                            "gasPrice": null,
+                            "maxPriorityFeePerGas": "0x1",
+                            "maxFeePerGas": "0x3",
+                            "value": "0x5af3107a4000",
+                            "input": "0x3593564c000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000006672d0a400000000000000000000000000000000000000000000000000000000000000020b000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000005af3107a40000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000005af3107a400000000000000000000000000000000000000000000000000000000353ca3e629a00000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002bae2c46ddb314b9ba743c6dee4878f151881333d9000bb8ebf1f662bf092ff0d913a9fe9d7179b0efef1611000000000000000000000000000000000000000000",
+                            "accessList": [],
+                            "v": "0x1",
+                            "r": "0x36517a175a60d3026380318917976fa32c82e542850357a611af05d2212ab9a4",
+                            "s": "0x32d89dce30d76287ddba907b0c662cd09dc30891b1c9c2ef644edfc53160b298",
+                            "yParity": "0x1",
+                            "hash": "0xece2a3c6ca097cfe5d97aad4e79393240f63865210f9c763703d1136f065298b"
+                        },
+                        {
+                            "type": "0x2",
+                            "chainId": "0x28c61",
+                            "nonce": "0x39",
+                            "to": "0x380a5ba81efe70fe98ab56613ebf9244a2f3d4c9",
+                            "gas": "0x2c2c8",
+                            "gasPrice": null,
+                            "maxPriorityFeePerGas": "0x1",
+                            "maxFeePerGas": "0x3",
+                            "value": "0x5af3107a4000",
+                            "input": "0x3593564c000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a0000000000000000000000000000000000000000000000000000000006672d0d400000000000000000000000000000000000000000000000000000000000000020b000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000004000000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000200000000000000000000000000000000000000000000000000005af3107a40000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000005af3107a400000000000000000000000000000000000000000000000000000000353ca3e629a00000000000000000000000000000000000000000000000000000000000000a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002bae2c46ddb314b9ba743c6dee4878f151881333d9000bb8ebf1f662bf092ff0d913a9fe9d7179b0efef1611000000000000000000000000000000000000000000",
+                            "accessList": [],
+                            "v": "0x0",
+                            "r": "0xc779421d1ee81dbd3dfbfad5fd632b45303b4513ea1b8ac0bc647f5430cd97b9",
+                            "s": "0x13cedef844bf5a954183182992ffbf9b8b23331de255157528be7da6614618b2",
+                            "yParity": "0x0",
+                            "hash": "0xb105d9f16e8fb913093c8a2c595bf4257328d256f218a05be8dcc626ddeb4193"
+                        }
+                    ]
+                ]
+            },
+            "error": null,
+            "id": 1
+        });
+    }
+}