Get blobs v2 metrics (#8641)

N/A


  Add standardized metrics for getBlobsV2 from ethereum/beacon-metrics#14.


Co-Authored-By: Pawan Dhananjay <pawandhananjay@gmail.com>

Author: pawanjay176

beacon_node/beacon_chain/src/fetch_blobs/mod.rs

@@ -247,13 +247,24 @@ async fn fetch_and_process_blobs_v2<T: BeaconChainTypes>(
 
     metrics::observe(&metrics::BLOBS_FROM_EL_EXPECTED, num_expected_blobs as f64);
     debug!(num_expected_blobs, "Fetching blobs from the EL");
+
+    // Track request count and duration for standardized metrics
+    inc_counter(&metrics::BEACON_ENGINE_GET_BLOBS_V2_REQUESTS_TOTAL);
+    let _timer =
+        metrics::start_timer(&metrics::BEACON_ENGINE_GET_BLOBS_V2_REQUEST_DURATION_SECONDS);
+
     let response = chain_adapter
         .get_blobs_v2(versioned_hashes)
         .await
         .inspect_err(|_| {
             inc_counter(&metrics::BLOBS_FROM_EL_ERROR_TOTAL);
         })?;
 
+    drop(_timer);
+
+    // Track successful response
+    inc_counter(&metrics::BEACON_ENGINE_GET_BLOBS_V2_RESPONSES_TOTAL);
+
     let Some(blobs_and_proofs) = response else {
         debug!(num_expected_blobs, "No blobs fetched from the EL");
         inc_counter(&metrics::BLOBS_FROM_EL_MISS_TOTAL);

beacon_node/beacon_chain/src/metrics.rs

@@ -1689,6 +1689,33 @@ pub static BLOBS_FROM_EL_RECEIVED: LazyLock<Result<Histogram>> = LazyLock::new(|
     )
 });
 
+/*
+ * Standardized getBlobs metrics across clients from https://github.com/ethereum/beacon-metrics
+ */
+pub static BEACON_ENGINE_GET_BLOBS_V2_REQUESTS_TOTAL: LazyLock<Result<IntCounter>> =
+    LazyLock::new(|| {
+        try_create_int_counter(
+            "beacon_engine_getBlobsV2_requests_total",
+            "Total number of engine_getBlobsV2 requests made to the execution layer",
+        )
+    });
+
+pub static BEACON_ENGINE_GET_BLOBS_V2_RESPONSES_TOTAL: LazyLock<Result<IntCounter>> =
+    LazyLock::new(|| {
+        try_create_int_counter(
+            "beacon_engine_getBlobsV2_responses_total",
+            "Total number of successful engine_getBlobsV2 responses from the execution layer",
+        )
+    });
+
+pub static BEACON_ENGINE_GET_BLOBS_V2_REQUEST_DURATION_SECONDS: LazyLock<Result<Histogram>> =
+    LazyLock::new(|| {
+        try_create_histogram(
+            "beacon_engine_getBlobsV2_request_duration_seconds",
+            "Duration of engine_getBlobsV2 requests to the execution layer in seconds",
+        )
+    });
+
 /*
  * Light server message verification
  */