fix submit span use

Author: dylanlott

src/tasks/submit/flashbots.rs

@@ -118,19 +118,20 @@ impl FlashbotsTask {
                 break;
             };
 
-            // Clone a span from the sim_env
             let span = sim_result.sim_env.clone_span();
-            let host_block_number = sim_result.host_block_number();
-            let ru_block_number = sim_result.block_number();
-            let rollup_tx_count = sim_result.block.tx_count();
-            span_debug!(span, "flashbots task received block");
 
             // Don't submit empty blocks
             if sim_result.block.is_empty() {
+                counter!("signet.builder.flashbots.empty_block").increment(1);
                 span_debug!(span, "received empty block - skipping");
                 continue;
             }
 
+            let host_block_number = sim_result.host_block_number();
+            let ru_block_number = sim_result.block_number();
+            let rollup_tx_count = sim_result.block.tx_count();
+            span_debug!(span, "flashbots task received block");
+
             // Prepare a MEV bundle with the configured call type from the sim result
             let bundle = match self.prepare(&sim_result).instrument(span.clone()).await {
                 Ok(b) => b,
@@ -158,21 +159,21 @@ impl FlashbotsTask {
                     .with_auth(self.signer.clone())
                     .await
             }
-            .instrument(submit_span)
+            .instrument(submit_span.clone())
             .await;
 
             match response {
                 Ok(resp) => {
                     counter!("signet.builder.flashbots.bundles_submitted").increment(1);
                     span_debug!(
-                        span,
+                        submit_span,
                         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);
-                    span_error!(span, %err, "MEV bundle submission failed - error returned");
+                    span_error!(submit_span, %err, "MEV bundle submission failed - error returned");
                 }
             }
         }