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feat: gracefully shutdown optimistic v3 server #814

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Merged
merged 1 commit into from
Nov 19, 2025
Merged

feat: gracefully shutdown optimistic v3 server #814

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3 changes: 3 additions & 0 deletions crates/rbuilder/src/live_builder/config.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -360,6 +360,7 @@ impl L1Config {
chain_spec: Arc<ChainSpec>,
relay_sets: Vec<RelaySet>,
bid_observer: Box<dyn BidObserver + Send + Sync>,
cancellation_token: CancellationToken,
) -> eyre::Result<(
RelaySubmitSinkFactory,
Vec<MevBoostRelaySlotInfoProvider>,
Expand Down Expand Up @@ -395,6 +396,7 @@ impl L1Config {
signing_domain,
self.optimistic_v3_relay_pubkeys.clone(),
BroadcastStream::from(optimistic_v3_block_rx),
cancellation_token,
)?;

optimistic_v3_config = Some(OptimisticV3Config {
Expand Down Expand Up @@ -1068,6 +1070,7 @@ where
base_config.chain_spec()?,
relay_sets.clone(),
bid_observer,
cancellation_token.clone(),
)?;

if !l1_config.relay_bid_scrapers.is_empty() {
Expand Down
13 changes: 12 additions & 1 deletion crates/rbuilder/src/mev_boost/optimistic_v3.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -21,6 +21,7 @@ use std::{
time::{Duration, Instant, SystemTime},
};
use tokio_stream::wrappers::{errors::BroadcastStreamRecvError, BroadcastStream};
use tokio_util::sync::CancellationToken;
use tracing::*;
use warp::{
http::{header::CONTENT_TYPE, HeaderValue, StatusCode},
Expand Down Expand Up @@ -65,6 +66,7 @@ pub fn spawn_server(
domain: B256,
relay_pubkeys: HashSet<BlsPublicKey>,
bid_stream: BroadcastStream<Arc<AlloySubmitBlockRequest>>,
cancellation: CancellationToken,
) -> eyre::Result<()> {
let blocks = Arc::new(Mutex::new(LruMap::new(ByLength::new(
OPTIMISTIC_V3_CACHE_SIZE_DEFAULT,
Expand Down Expand Up @@ -92,7 +94,16 @@ pub fn spawn_server(
))
.and(warp::body::bytes())
.map(Handler::get_payload_v3_metered);
tokio::spawn(warp::serve(path).run(address));

let (_, server) = warp::serve(path).bind_with_graceful_shutdown(address, async move {
cancellation.cancelled().await;
let now = std::time::Instant::now();
info!(target: "relay_server", "Received cancellation, initiating graceful shutdown");
// Sleep for 12 seconds to avoid being demoted for the current slot.
tokio::time::sleep(Duration::from_secs(12)).await;
info!(target: "relay_server", elapsed = ?now.elapsed(), "Graceful shutdown complete");
});
tokio::spawn(server);
info!(target: "relay_server", %address, "Relay server listening");

Ok(())
Expand Down
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