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fix(flashbots): Do not block on submission #184

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Merged
Evalir merged 3 commits into from
Dec 4, 2025
Merged

fix(flashbots): Do not block on submission #184

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2453888
fix(flashbots): do not block on submission
Evalir Nov 25, 2025
ad75d09
chore: correctly instrument submission
Evalir Dec 4, 2025
0bb02ac
chore: use debug and error instead of span_*
Evalir Dec 4, 2025
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49 changes: 27 additions & 22 deletions src/tasks/submit/flashbots.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -14,7 +14,7 @@ use alloy::{
use eyre::OptionExt;
use init4_bin_base::{deps::metrics::counter, utils::signer::LocalOrAws};
use tokio::{sync::mpsc, task::JoinHandle};
use tracing::{Instrument, debug, debug_span};
use tracing::{Instrument, debug, debug_span, error};

/// Handles preparation and submission of simulated rollup blocks to the
/// Flashbots relay as MEV bundles.
Expand Down Expand Up @@ -191,28 +191,33 @@ impl FlashbotsTask {

// Send the bundle to Flashbots, instrumenting the send future so all
// events inside the async send are attributed to the submit span.
let response = self
.flashbots()
.send_mev_bundle(bundle.clone())
.with_auth(self.signer.clone())
.into_future()
.instrument(submit_span.clone())
.await;

match response {
Ok(resp) => {
counter!("signet.builder.flashbots.bundles_submitted").increment(1);
span_debug!(
submit_span,
hash = resp.map(|r| r.bundle_hash.to_string()),
"received bundle hash after submitted to flashbots"
);
let flashbots = self.flashbots().to_owned();
let signer = self.signer.clone();

tokio::spawn(
async move {
let response = flashbots
.send_mev_bundle(bundle.clone())
.with_auth(signer.clone())
.into_future()
.await;

match response {
Ok(resp) => {
counter!("signet.builder.flashbots.bundles_submitted").increment(1);
debug!(
hash = resp.map(|r| r.bundle_hash.to_string()),
"received bundle hash after submitted to flashbots"
);
}
Err(err) => {
counter!("signet.builder.flashbots.submission_failures").increment(1);
error!(%err, "MEV bundle submission failed - error returned");
}
}
}
Err(err) => {
counter!("signet.builder.flashbots.submission_failures").increment(1);
span_error!(submit_span, %err, "MEV bundle submission failed - error returned");
}
}
.instrument(submit_span.clone()),
);
}
}

Expand Down