feat: Add logs for validator checkpoints in relayer (#5217)

### Description

Add logs into relayer so than it logs validator and their store location
for checkpoints

### Backward compatibility

Yes

### Testing

Running locally

Co-authored-by: Danil Nemirovsky <[email protected]>

Author: ameten

rust/main/agents/relayer/src/msg/metadata/base.rs

@@ -367,6 +367,7 @@ impl BaseMetadataBuilder {
 
     pub async fn build_checkpoint_syncer(
         &self,
+        message: &HyperlaneMessage,
         validators: &[H256],
         app_context: Option<String>,
     ) -> Result<MultisigCheckpointSyncer> {
@@ -375,9 +376,18 @@ impl BaseMetadataBuilder {
             .get_announced_storage_locations(validators)
             .await?;
 
+        debug!(
+            hyp_message=?message,
+            ?validators,
+            validators_len = ?validators.len(),
+            ?storage_locations,
+            storage_locations_len = ?storage_locations.len(),
+            "List of validators and their storage locations for message");
+
         // Only use the most recently announced location for now.
         let mut checkpoint_syncers: HashMap<H160, Arc<dyn CheckpointSyncer>> = HashMap::new();
         for (&validator, validator_storage_locations) in validators.iter().zip(storage_locations) {
+            debug!(hyp_message=?message, ?validator, ?validator_storage_locations, "Validator and its storage locations for message");
             for storage_location in validator_storage_locations.iter().rev() {
                 let Ok(config) = CheckpointSyncerConf::from_str(storage_location) else {
                     debug!(

rust/main/agents/relayer/src/msg/metadata/multisig/base.rs

@@ -115,9 +115,11 @@ impl<T: MultisigIsmMetadataBuilder> MetadataBuilder for T {
             return Ok(None);
         }
 
+        info!(hyp_message=?message, ?validators, threshold, "List of validators and threshold for message");
+
         let checkpoint_syncer = self
             .as_ref()
-            .build_checkpoint_syncer(&validators, self.as_ref().app_context.clone())
+            .build_checkpoint_syncer(message, &validators, self.as_ref().app_context.clone())
             .await
             .context(CTX)?;
 

rust/main/hyperlane-base/src/types/multisig.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 
 use derive_new::new;
 use eyre::Result;
-use tracing::{debug, instrument};
+use tracing::{debug, instrument, warn};
 
 use hyperlane_core::{
     HyperlaneDomain, MultisigSignedCheckpoint, SignedCheckpointWithMessageId, H160, H256,
@@ -40,6 +40,10 @@ impl MultisigCheckpointSyncer {
 
         for validator in validators {
             let address = H160::from(*validator);
+            debug!(
+                ?address,
+                "Getting latest checkpoint from validator via checkpoint syncer",
+            );
             if let Some(checkpoint_syncer) = self.checkpoint_syncers.get(&address) {
                 // Gracefully handle errors getting the latest_index
                 match checkpoint_syncer.latest_index().await {
@@ -56,6 +60,8 @@ impl MultisigCheckpointSyncer {
                         latest_indices.insert(H160::from(*validator), None);
                     }
                 }
+            } else {
+                warn!(?address, "Checkpoint syncer is not provided for validator");
             }
         }