feat(eth-sender): Add transient ethereum gateway errors metric (matter-labs#2323)

Signed-off-by: tomg10 <lemures64@gmail.com>

Author: tomg10

core/node/eth_sender/src/error.rs

@@ -10,3 +10,12 @@ pub enum EthSenderError {
     #[error("Token parsing error: {0}")]
     Parse(#[from] contract::Error),
 }
+
+impl EthSenderError {
+    pub fn is_transient(&self) -> bool {
+        match self {
+            EthSenderError::EthereumGateway(err) => err.is_transient(),
+            _ => false,
+        }
+    }
+}

core/node/eth_sender/src/eth_tx_manager.rs

@@ -232,6 +232,8 @@ impl EthTxManager {
                         .remove_tx_history(tx_history_id)
                         .await
                         .unwrap();
+                } else {
+                    METRICS.l1_transient_errors.inc();
                 }
                 Err(error.into())
             }
@@ -563,6 +565,9 @@ impl EthTxManager {
                     // Web3 API request failures can cause this,
                     // and anything more important is already properly reported.
                     tracing::warn!("eth_sender error {:?}", e);
+                    if e.is_transient() {
+                        METRICS.l1_transient_errors.inc();
+                    }
                 }
             }
 

core/node/eth_sender/src/metrics.rs

@@ -107,6 +107,7 @@ pub(super) struct EthSenderMetrics {
     pub l1_blocks_waited_in_mempool: Family<ActionTypeLabel, Histogram<u64>>,
     /// Number of L1 batches aggregated for publishing with a specific reason.
     pub block_aggregation_reason: Family<AggregationReasonLabels, Counter>,
+    pub l1_transient_errors: Counter,
 }
 
 impl EthSenderMetrics {