Make indexer support single shard tracking.

chain/indexer/Cargo.toml

@@ -25,8 +25,9 @@ nearcore.workspace = true
 near-client.workspace = true
 near-chain-configs.workspace = true
 near-config-utils.workspace = true
-near-dyn-configs.workspace = true
 near-crypto.workspace = true
+near-dyn-configs.workspace = true
+near-epoch-manager.workspace = true
 near-indexer-primitives.workspace = true
 near-o11y.workspace = true
 near-parameters.workspace = true
@@ -39,6 +40,7 @@ nightly_protocol = [
   "near-chain-configs/nightly_protocol",
   "near-client/nightly_protocol",
   "near-dyn-configs/nightly_protocol",
+  "near-epoch-manager/nightly_protocol",
   "near-indexer-primitives/nightly_protocol",
   "near-o11y/nightly_protocol",
   "near-parameters/nightly_protocol",
@@ -52,6 +54,7 @@ nightly = [
   "near-chain-configs/nightly",
   "near-client/nightly",
   "near-dyn-configs/nightly",
+  "near-epoch-manager/nightly",
   "near-indexer-primitives/nightly",
   "near-o11y/nightly",
   "near-parameters/nightly",

chain/indexer/src/lib.rs

@@ -15,6 +15,7 @@ pub use near_indexer_primitives::{
     StreamerMessage,
 };
 
+use near_epoch_manager::shard_tracker::ShardTracker;
 pub use streamer::build_streamer_message;
 
 mod streamer;
@@ -92,6 +93,7 @@ pub struct Indexer {
     near_config: nearcore::NearConfig,
     view_client: actix::Addr<near_client::ViewClientActor>,
     client: actix::Addr<near_client::ClientActor>,
+    shard_tracker: ShardTracker,
 }
 
 impl Indexer {
@@ -113,16 +115,16 @@ impl Indexer {
                 .unwrap_or_else(|e| panic!("Error loading config: {:#}", e));
 
         assert!(
-            !&near_config.client_config.tracked_shards.is_empty(),
-            "Indexer should track at least one shard. \n\
-            Tip: You may want to update {} with `\"tracked_shards\": [0]`
-            ",
+            !&near_config.client_config.tracked_shards.is_empty() || !&near_config.client_config.tracked_accounts.is_empty(),
+            "Indexer should either track at least one shard or track at least one account. \n\
+            Tip: You may want to update {} with `\"tracked_shards\": [0]` (which tracks all shards)
+            or `\"tracked_accounts\": [\"some_account.near\"]` (which tracks whatever shard the account is on)",
             indexer_config.home_dir.join("config.json").display()
         );
-        let nearcore::NearNode { client, view_client, .. } =
+        let nearcore::NearNode { client, view_client, shard_tracker, .. } =
             nearcore::start_with_config(&indexer_config.home_dir, near_config.clone())
                 .with_context(|| "start_with_config")?;
-        Ok(Self { view_client, client, near_config, indexer_config })
+        Ok(Self { view_client, client, near_config, indexer_config, shard_tracker })
     }
 
     /// Boots up `near_indexer::streamer`, so it monitors the new blocks with chunks, transactions, receipts, and execution outcomes inside. The returned stream handler should be drained and handled on the user side.
@@ -131,6 +133,7 @@ impl Indexer {
         actix::spawn(streamer::start(
             self.view_client.clone(),
             self.client.clone(),
+            self.shard_tracker.clone(),
             self.indexer_config.clone(),
             self.near_config.config.store.clone(),
             sender,

chain/indexer/src/streamer/fetchers.rs

@@ -13,6 +13,7 @@ use near_primitives::{types, views};
 
 use super::errors::FailedToFetchData;
 use super::INDEXER;
+use near_epoch_manager::shard_tracker::ShardTracker;
 
 pub(crate) async fn fetch_status(
     client: &Addr<near_client::ClientActor>,
@@ -161,12 +162,16 @@ async fn fetch_single_chunk(
 pub(crate) async fn fetch_block_chunks(
     client: &Addr<near_client::ViewClientActor>,
     block: &views::BlockView,
+    shard_tracker: &ShardTracker,
 ) -> Result<Vec<views::ChunkView>, FailedToFetchData> {
     tracing::debug!(target: INDEXER, "Fetching chunks for block #{}", block.header.height);
     let mut futures: futures::stream::FuturesUnordered<_> = block
         .chunks
         .iter()
-        .filter(|chunk| chunk.height_included == block.header.height)
+        .filter(|chunk| {
+            shard_tracker.care_about_shard(None, &block.header.prev_hash, chunk.shard_id, false)
+                && chunk.height_included == block.header.height
+        })
         .map(|chunk| fetch_single_chunk(&client, chunk.chunk_hash))
         .collect();
     let mut chunks = Vec::<views::ChunkView>::with_capacity(futures.len());

chain/indexer/src/streamer/mod.rs

@@ -26,6 +26,7 @@ use self::utils::convert_transactions_sir_into_local_receipts;
 use crate::streamer::fetchers::fetch_protocol_config;
 use crate::INDEXER;
 use crate::{AwaitForNodeSyncedEnum, IndexerConfig};
+use near_epoch_manager::shard_tracker::ShardTracker;
 
 mod errors;
 mod fetchers;
@@ -74,9 +75,10 @@ fn test_problematic_blocks_hash() {
 pub async fn build_streamer_message(
     client: &Addr<near_client::ViewClientActor>,
     block: views::BlockView,
+    shard_tracker: &ShardTracker,
 ) -> Result<StreamerMessage, FailedToFetchData> {
     let _timer = metrics::BUILD_STREAMER_MESSAGE_TIME.start_timer();
-    let chunks = fetch_block_chunks(&client, &block).await?;
+    let chunks = fetch_block_chunks(&client, &block, shard_tracker).await?;
 
     let protocol_config_view = fetch_protocol_config(&client, block.header.hash).await?;
     let shard_ids = protocol_config_view.shard_layout.shard_ids();
@@ -200,6 +202,7 @@ pub async fn build_streamer_message(
                         &runtime_config,
                         block.clone(),
                         execution_outcome.id,
+                        shard_tracker,
                     )
                     .await?
                 }
@@ -276,6 +279,7 @@ async fn lookup_delayed_local_receipt_in_previous_blocks(
     runtime_config: &RuntimeConfig,
     block: views::BlockView,
     receipt_id: CryptoHash,
+    shard_tracker: &ShardTracker,
 ) -> Result<views::ReceiptView, FailedToFetchData> {
     let mut prev_block_tried = 0u16;
     let mut prev_block_hash = block.header.prev_hash;
@@ -299,9 +303,14 @@ async fn lookup_delayed_local_receipt_in_previous_blocks(
 
         prev_block_hash = prev_block.header.prev_hash;
 
-        if let Some(receipt) =
-            find_local_receipt_by_id_in_block(&client, &runtime_config, prev_block, receipt_id)
-                .await?
+        if let Some(receipt) = find_local_receipt_by_id_in_block(
+            &client,
+            &runtime_config,
+            prev_block,
+            receipt_id,
+            shard_tracker,
+        )
+        .await?
         {
             tracing::debug!(
                 target: INDEXER,
@@ -324,8 +333,9 @@ async fn find_local_receipt_by_id_in_block(
     runtime_config: &RuntimeConfig,
     block: views::BlockView,
     receipt_id: near_primitives::hash::CryptoHash,
+    shard_tracker: &ShardTracker,
 ) -> Result<Option<views::ReceiptView>, FailedToFetchData> {
-    let chunks = fetch_block_chunks(&client, &block).await?;
+    let chunks = fetch_block_chunks(&client, &block, shard_tracker).await?;
 
     let protocol_config_view = fetch_protocol_config(&client, block.header.hash).await?;
     let mut shards_outcomes = fetch_outcomes(&client, block.header.hash).await?;
@@ -371,6 +381,7 @@ async fn find_local_receipt_by_id_in_block(
 pub(crate) async fn start(
     view_client: Addr<near_client::ViewClientActor>,
     client: Addr<near_client::ClientActor>,
+    shard_tracker: ShardTracker,
     indexer_config: IndexerConfig,
     store_config: near_store::StoreConfig,
     blocks_sink: mpsc::Sender<StreamerMessage>,
@@ -437,7 +448,7 @@ pub(crate) async fn start(
         for block_height in start_syncing_block_height..=latest_block_height {
             metrics::CURRENT_BLOCK_HEIGHT.set(block_height as i64);
             if let Ok(block) = fetch_block_by_height(&view_client, block_height).await {
-                let response = build_streamer_message(&view_client, block).await;
+                let response = build_streamer_message(&view_client, block, &shard_tracker).await;
 
                 match response {
                     Ok(streamer_message) => {

nearcore/src/lib.rs

@@ -225,6 +225,8 @@ pub struct NearNode {
     pub resharding_handle: ReshardingHandle,
     // The threads that state sync runs in.
     pub state_sync_runtime: Arc<tokio::runtime::Runtime>,
+    /// Shard tracker, allows querying of which shards are tracked by this node.
+    pub shard_tracker: ShardTracker,
 }
 
 pub fn start_with_config(home_dir: &Path, config: NearConfig) -> anyhow::Result<NearNode> {
@@ -428,7 +430,7 @@ pub fn start_with_config_and_synchronization(
         client_config: config.client_config.clone(),
         chain_genesis,
         epoch_manager,
-        shard_tracker,
+        shard_tracker: shard_tracker.clone(),
         runtime,
         validator: config.validator_signer.clone(),
         dump_future_runner: StateSyncDumper::arbiter_dump_future_runner(),
@@ -511,5 +513,6 @@ pub fn start_with_config_and_synchronization(
         state_sync_dumper,
         resharding_handle,
         state_sync_runtime,
+        shard_tracker,
     })
 }