fix(backend): resolve clippy lints

backend/src/bin/client.rs

@@ -110,7 +110,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                                         },
                                         SerializableExecEvent::TxnEvmOutput { txn_index, .. } => {
                                             if let Some((txn_hash, txn_start_ns)) = client_state.txs_start_ns.remove(&txn_index) {
-                                                let txn_duration = std::time::Duration::from_nanos((event.timestamp_ns - txn_start_ns) as u64);
+                                                let txn_duration = std::time::Duration::from_nanos(event.timestamp_ns - txn_start_ns);
                                                 client_state.block_txns_total_duration += txn_duration;
 
                                                 log_event!("TxnEvmOutput", txn_index = txn_index, txn_hash = txn_hash, duration = txn_duration);
@@ -120,7 +120,7 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
                                         },
                                         SerializableExecEvent::BlockPerfEvmExit => {
                                             log_event!("BlockPerfEvmExit");
-                                            let block_duration = std::time::Duration::from_nanos((event.timestamp_ns - client_state.block_start_ns) as u64);
+                                            let block_duration = std::time::Duration::from_nanos(event.timestamp_ns - client_state.block_start_ns);
                                             let parallel_execution_savings = client_state.block_txns_total_duration.checked_sub(block_duration);
                                             let savings_pct = if parallel_execution_savings.is_none() { // This only happens with really small/empty blocks
                                                 error!("Parallel execution savings is negative: txs={:?} block={:?} height={}", client_state.block_txns_total_duration, block_duration, client_state.current_block_number);

backend/src/lib/event_filter.rs

@@ -63,7 +63,7 @@ pub struct ArrayPrefixFilter<T: PartialEq> {
 
 impl<T: PartialEq> ArrayPrefixFilter<T> {
     /// Checks if input array starts with filter values (prefix match)
-    pub fn matches(&self, value: &Vec<T>) -> bool {
+    pub fn matches(&self, value: &[T]) -> bool {
         self.values.is_empty() || value.starts_with(&self.values)
     }
 
@@ -192,7 +192,7 @@ impl EventFilter {
             return true;
         }
 
-        if self.includes_native_transfers() && is_native_transfer(&event) {
+        if self.includes_native_transfers() && is_native_transfer(event) {
             return true;
         }
 

backend/src/lib/event_listener.rs

@@ -85,7 +85,7 @@ impl EventName {
         }
     }
 
-    pub fn from_str(s: &str) -> Option<Self> {
+    pub fn from_name(s: &str) -> Option<Self> {
         match s {
             "RECORD_ERROR" => Some(EventName::RecordError),
             "BLOCK_START" => Some(EventName::BlockStart),
@@ -157,7 +157,7 @@ fn event_to_data(event: &EventDescriptor<ExecEventDecoder>) -> Option<EventData>
     } = event.info();
 
     // Convert event_type to EventName enum for type safety
-    let event_name = EventName::from_str(EXEC_EVENT_NAMES[event_type as usize])?;
+    let event_name = EventName::from_name(EXEC_EVENT_NAMES[event_type as usize])?;
 
     // Get block number if present
     let block_number = if flow_info.block_seqno != 0 {
@@ -284,7 +284,7 @@ pub fn run_event_listener(
                     last_event_timestamp_ns = Some(event.info().record_epoch_nanos);
                     event_count += 1;
 
-                    if event_count % 100 == 0 {
+                    if event_count.is_multiple_of(100) {
                         debug!("Processed {} events", event_count);
                     }
 

backend/src/lib/serializable_event.rs

@@ -326,7 +326,7 @@ impl From<&EventData> for SerializableEventData {
             txn_hash: data.txn_hash.map(B256::from),
             payload: SerializableExecEvent::from(&data.payload),
             seqno: data.seqno,
-            timestamp_ns: data.timestamp_ns.clone(),
+            timestamp_ns: data.timestamp_ns,
         }
     }
 }

backend/src/lib/server.rs

@@ -43,7 +43,7 @@ pub struct TopAccessesData {
 
 #[derive(Debug, Clone)]
 pub enum EventDataOrMetrics {
-    Event(EventData),
+    Event(Box<EventData>),
     TopAccesses(TopAccessesData),
     TPS(usize)
 }
@@ -80,7 +80,7 @@ impl TPSTracker {
         self.block_2_txs = self.block_3_txs;
         self.block_3_txs = self.current_tx_count;
         self.current_tx_count = 0;
-        return self.block_1_txs + self.block_2_txs + (self.block_3_txs / 2);
+        self.block_1_txs + self.block_2_txs + (self.block_3_txs / 2)
     }
 }
 
@@ -95,7 +95,7 @@ fn process_event(
 ) {
     match event {
         EventDataOrMetrics::Event(event_data) => {
-            let serializable = SerializableEventData::from(&event_data);
+            let serializable = SerializableEventData::from(&*event_data);
             if filter.matches_event(&serializable) {
                 events_buf.push(serializable);
             }
@@ -289,13 +289,9 @@ async fn run_event_forwarder_task(
                 }
 
                 // Send accesses update on BlockEnd events (after all access events are processed)
-                let send_accesses_update = if let EventName::BlockEnd = event_data.event_name {
-                    true
-                } else {
-                    false
-                };
+                let send_accesses_update = matches!(event_data.event_name, EventName::BlockEnd);
 
-                let _ = event_broadcast_sender.send(EventDataOrMetrics::Event(event_data));
+                let _ = event_broadcast_sender.send(EventDataOrMetrics::Event(Box::new(event_data)));
 
                 if send_accesses_update {
                     let top_accesses_data = TopAccessesData {