solana-accountsdb-connector/service-mango-fills/src/main.rs

use futures_channel::mpsc::{unbounded, UnboundedSender};
use futures_util::{pin_mut, SinkExt, StreamExt};
use log::*;
use std::{collections::HashMap, fs::File, io::Read, net::SocketAddr, sync::Arc, sync::Mutex};
use tokio::{
    net::{TcpListener, TcpStream},
    pin,
};
use tokio_tungstenite::tungstenite::protocol::Message;

use serde::Deserialize;
use solana_geyser_connector_lib::{
    fill_event_filter::{self, FillCheckpoint, FillEventFilterMessage, MarketConfig},
    grpc_plugin_source, metrics, websocket_source, SourceConfig,
};

type CheckpointMap = Arc<Mutex<HashMap<String, FillCheckpoint>>>;
type PeerMap = Arc<Mutex<HashMap<SocketAddr, UnboundedSender<Message>>>>;

async fn handle_connection(
    checkpoint_map: CheckpointMap,
    peer_map: PeerMap,
    raw_stream: TcpStream,
    addr: SocketAddr,
) {
    info!("ws connected: {}", addr);
    let ws_stream = tokio_tungstenite::accept_async(raw_stream)
        .await
        .expect("Error during the ws handshake occurred");
    let (mut ws_tx, _ws_rx) = ws_stream.split();

    // 1: publish channel in peer map
    let (chan_tx, chan_rx) = unbounded();
    {
        peer_map.lock().unwrap().insert(addr, chan_tx);
        info!("ws published: {}", addr);
    }

    // 2: send initial checkpoint
    {
        let checkpoint_map_copy = checkpoint_map.lock().unwrap().clone();
        for (_, ckpt) in checkpoint_map_copy.iter() {
            ws_tx
                .feed(Message::Text(serde_json::to_string(ckpt).unwrap()))
                .await
                .unwrap();
        }
    }
    let result_ckpt = ws_tx.flush().await;
    info!("ws ckpt sent: {} err: {:?}", addr, result_ckpt);

    // 3: forward all events from channel to peer socket
    let forward_updates = chan_rx.map(Ok).forward(ws_tx);
    pin_mut!(forward_updates);
    let result_forward = forward_updates.await;

    info!("ws disconnected: {} err: {:?}", &addr, result_forward);
    peer_map.lock().unwrap().remove(&addr);
    result_ckpt.unwrap();
    result_forward.unwrap();
}

#[derive(Clone, Debug, Deserialize)]
pub struct Config {
    pub source: SourceConfig,
    pub markets: Vec<MarketConfig>,
    pub bind_ws_addr: String,
}

#[tokio::main]
async fn main() -> anyhow::Result<()> {
    let args: Vec<String> = std::env::args().collect();
    if args.len() < 2 {
        error!("requires a config file argument");
        return Ok(());
    }

    let config: Config = {
        let mut file = File::open(&args[1])?;
        let mut contents = String::new();
        file.read_to_string(&mut contents)?;
        toml::from_str(&contents).unwrap()
    };

    solana_logger::setup_with_default("info");

    let metrics_tx = metrics::start();

    let (account_write_queue_sender, slot_queue_sender, fill_receiver) =
        fill_event_filter::init(config.markets.clone()).await?;

    let checkpoints = CheckpointMap::new(Mutex::new(HashMap::new()));
    let peers = PeerMap::new(Mutex::new(HashMap::new()));

    let checkpoints_ref_thread = checkpoints.clone();
    let peers_ref_thread = peers.clone();

    // filleventfilter websocket sink
    tokio::spawn(async move {
        pin!(fill_receiver);
        loop {
            let message = fill_receiver.recv().await.unwrap();
            match message {
                FillEventFilterMessage::Update(update) => {
                    info!("ws update {} {:?} fill", update.market, update.status);

                    let mut peer_copy = peers_ref_thread.lock().unwrap().clone();

                    for (k, v) in peer_copy.iter_mut() {
                        debug!("  > {}", k);

                        let json = serde_json::to_string(&update);

                        v.send(Message::Text(json.unwrap())).await.unwrap()
                    }
                }
                FillEventFilterMessage::Checkpoint(checkpoint) => {
                    checkpoints_ref_thread
                        .lock()
                        .unwrap()
                        .insert(checkpoint.queue.clone(), checkpoint);
                }
            }
        }
    });

    info!("ws listen: {}", config.bind_ws_addr);
    let try_socket = TcpListener::bind(&config.bind_ws_addr).await;
    let listener = try_socket.expect("Failed to bind");
    tokio::spawn(async move {
        // Let's spawn the handling of each connection in a separate task.
        while let Ok((stream, addr)) = listener.accept().await {
            tokio::spawn(handle_connection(
                checkpoints.clone(),
                peers.clone(),
                stream,
                addr,
            ));
        }
    });

    info!(
        "rpc connect: {}",
        config
            .source
            .grpc_sources
            .iter()
            .map(|c| c.connection_string.clone())
            .collect::<String>()
    );
    let use_geyser = true;
    if use_geyser {
        grpc_plugin_source::process_events(
            &config.source,
            account_write_queue_sender,
            slot_queue_sender,
            metrics_tx,
        )
        .await;
    } else {
        websocket_source::process_events(
            &config.source,
            account_write_queue_sender,
            slot_queue_sender,
        )
        .await;
    }

    Ok(())
}