Add new job queue for historical blocks processing (#442)

* Add TODOs for historical blocks processing

* Add new job for historical blocks processing

* Handle historical job completion

* Fetch latest block in chain and start historical block processing

* Fix starting realtime block processing from latest canonical block

* Refactor historical block processing method and add logs

* Add dummy indexer methods in graph-node to pass test

* Changes in codegen for historical processing in generated watcher

packages/codegen/src/templates/database-template.handlebars

@@ -253,6 +253,12 @@ export class Database implements DatabaseInterface {
     return this._baseDatabase.updateSyncStatusChainHead(repo, blockHash, blockNumber, force);
   }
 
+  async forceUpdateSyncStatus (queryRunner: QueryRunner, blockHash: string, blockNumber: number): Promise<SyncStatus> {
+    const repo = queryRunner.manager.getRepository(SyncStatus);
+
+    return this._baseDatabase.forceUpdateSyncStatus(repo, blockHash, blockNumber);
+  }
+
   async getSyncStatus (queryRunner: QueryRunner): Promise<SyncStatus | undefined> {
     const repo = queryRunner.manager.getRepository(SyncStatus);
 
@@ -271,6 +277,12 @@ export class Database implements DatabaseInterface {
     return this._baseDatabase.getBlocksAtHeight(repo, height, isPruned);
   }
 
+  async getLatestProcessedBlockProgress (isPruned: boolean): Promise<BlockProgress | undefined> {
+    const repo = this._conn.getRepository(BlockProgress);
+
+    return this._baseDatabase.getLatestProcessedBlockProgress(repo, isPruned);
+  }
+
   async markBlocksAsPruned (queryRunner: QueryRunner, blocks: BlockProgress[]): Promise<void> {
     const repo = queryRunner.manager.getRepository(BlockProgress);
 

packages/codegen/src/templates/indexer-template.handlebars

@@ -509,7 +509,7 @@ export class Indexer implements IndexerInterface {
     if (!this._serverConfig.enableState) {
       return;
     }
-    
+
     const dbTx = await this._db.createTransactionRunner();
     let res;
 
@@ -637,6 +637,10 @@ export class Indexer implements IndexerInterface {
     return syncStatus;
   }
 
+  async forceUpdateSyncStatus (blockHash: string, blockNumber: number): Promise<SyncStatus> {
+    return this._baseIndexer.forceUpdateSyncStatus(blockHash, blockNumber);
+  }
+
   async getEvent (id: string): Promise<Event | undefined> {
     return this._baseIndexer.getEvent(id);
   }
@@ -653,6 +657,10 @@ export class Indexer implements IndexerInterface {
     return this._baseIndexer.getBlocksAtHeight(height, isPruned);
   }
 
+  async getLatestProcessedBlockProgress (isPruned: boolean): Promise<BlockProgress | undefined> {
+    return this._db.getLatestProcessedBlockProgress(isPruned);
+  }
+
   async fetchEventsAndSaveBlocks (blocks: DeepPartial<BlockProgress>[]): Promise<{ blockProgress: BlockProgress, events: DeepPartial<Event>[] }[]> {
     return this._baseIndexer.fetchEventsAndSaveBlocks(blocks, this._eventSignaturesMap, this.parseEventNameAndArgs.bind(this));
   }

packages/codegen/src/templates/job-runner-template.handlebars

@@ -34,6 +34,7 @@ export const main = async (): Promise<any> => {
 
   await jobRunnerCmd.exec(async (jobRunner: JobRunner): Promise<void> => {
     await jobRunner.subscribeBlockProcessingQueue();
+    await jobRunner.subscribeHistoricalProcessingQueue();
     await jobRunner.subscribeEventProcessingQueue();
     await jobRunner.subscribeBlockCheckpointQueue();
     await jobRunner.subscribeHooksQueue();

packages/graph-node/test/utils/indexer.ts

@@ -93,6 +93,12 @@ export class Indexer implements IndexerInterface {
     return [];
   }
 
+  async getLatestProcessedBlockProgress (isPruned: boolean): Promise<BlockProgressInterface | undefined> {
+    assert(isPruned);
+
+    return undefined;
+  }
+
   async getBlockEvents (blockHash: string): Promise<Array<EventInterface>> {
     assert(blockHash);
 
@@ -150,6 +156,13 @@ export class Indexer implements IndexerInterface {
     return {} as SyncStatusInterface;
   }
 
+  async forceUpdateSyncStatus (blockHash: string, blockNumber: number): Promise<SyncStatusInterface> {
+    assert(blockNumber);
+    assert(blockHash);
+
+    return {} as SyncStatusInterface;
+  }
+
   async markBlocksAsPruned (blocks: BlockProgressInterface[]): Promise<void> {
     assert(blocks);
 

packages/util/src/common.ts

@@ -129,7 +129,7 @@ export const fetchBlocksAtHeight = async (
       cid,
       blockHash,
       parentHash,
-      blockTimestamp: timestamp
+      blockTimestamp: Number(timestamp)
     });
   }
 
@@ -182,6 +182,9 @@ export const _fetchBatchBlocks = async (
   while (true) {
     console.time('time:common#fetchBatchBlocks-getBlocks');
 
+    // TODO: Fetch logs by filter before fetching blocks
+    // TODO: Fetch only blocks needed for returned logs
+    // TODO: Save blocks and logs to DB
     const blockPromises = blockNumbers.map(async blockNumber => indexer.getBlocks({ blockNumber }));
     const settledResults = await Promise.allSettled(blockPromises);
 
@@ -238,7 +241,7 @@ export const _fetchBatchBlocks = async (
   }
 
   blocks.forEach(block => {
-    block.blockTimestamp = block.timestamp;
+    block.blockTimestamp = Number(block.timestamp);
     block.blockNumber = Number(block.blockNumber);
   });
 
@@ -265,7 +268,7 @@ export const processBatchEvents = async (indexer: IndexerInterface, block: Block
 
   if (indexer.processBlockAfterEvents) {
     if (!dbBlock.isComplete) {
-      await indexer.processBlockAfterEvents(block.blockHash, block.blockNumber);
+      await indexer.processBlockAfterEvents(dbBlock.blockHash, dbBlock.blockNumber);
     }
   }
 

packages/util/src/constants.ts

@@ -6,6 +6,7 @@ export const MAX_REORG_DEPTH = 16;
 export const DIFF_MERGE_BATCH_SIZE = 10000;
 
 export const QUEUE_BLOCK_PROCESSING = 'block-processing';
+export const QUEUE_HISTORICAL_PROCESSING = 'historical-processing';
 export const QUEUE_EVENT_PROCESSING = 'event-processing';
 export const QUEUE_CHAIN_PRUNING = 'chain-pruning';
 export const QUEUE_BLOCK_CHECKPOINT = 'block-checkpoint';

packages/util/src/database.ts

@@ -166,6 +166,26 @@ export class Database {
     return await repo.save(entity);
   }
 
+  async forceUpdateSyncStatus (repo: Repository<SyncStatusInterface>, blockHash: string, blockNumber: number): Promise<SyncStatusInterface> {
+    let entity = await repo.findOne();
+
+    if (!entity) {
+      entity = repo.create({
+        initialIndexedBlockHash: blockHash,
+        initialIndexedBlockNumber: blockNumber
+      });
+    }
+
+    entity.chainHeadBlockHash = blockHash;
+    entity.chainHeadBlockNumber = blockNumber;
+    entity.latestCanonicalBlockHash = blockHash;
+    entity.latestCanonicalBlockNumber = blockNumber;
+    entity.latestIndexedBlockHash = blockHash;
+    entity.latestIndexedBlockNumber = blockNumber;
+
+    return await repo.save(entity);
+  }
+
   async getBlockProgress (repo: Repository<BlockProgressInterface>, blockHash: string): Promise<BlockProgressInterface | undefined> {
     return repo.findOne({ where: { blockHash } });
   }
@@ -182,6 +202,14 @@ export class Database {
       .getMany();
   }
 
+  async getLatestProcessedBlockProgress (repo: Repository<BlockProgressInterface>, isPruned: boolean): Promise<BlockProgressInterface | undefined> {
+    return repo.createQueryBuilder('block_progress')
+      .where('is_pruned = :isPruned AND is_complete = :isComplete', { isPruned, isComplete: true })
+      .orderBy('block_number', 'DESC')
+      .limit(1)
+      .getOne();
+  }
+
   async saveBlockProgress (repo: Repository<BlockProgressInterface>, block: DeepPartial<BlockProgressInterface>): Promise<BlockProgressInterface> {
     blockProgressCount.inc(1);
 

packages/util/src/events.ts

@@ -5,12 +5,15 @@
 import assert from 'assert';
 import debug from 'debug';
 import { PubSub } from 'graphql-subscriptions';
+import PgBoss from 'pg-boss';
+import { constants } from 'ethers';
 
 import { JobQueue } from './job-queue';
 import { BlockProgressInterface, EventInterface, IndexerInterface, EthClient } from './types';
-import { MAX_REORG_DEPTH, JOB_KIND_PRUNE, JOB_KIND_INDEX, UNKNOWN_EVENT_NAME, JOB_KIND_EVENTS, QUEUE_BLOCK_PROCESSING, QUEUE_EVENT_PROCESSING } from './constants';
+import { MAX_REORG_DEPTH, JOB_KIND_PRUNE, JOB_KIND_INDEX, UNKNOWN_EVENT_NAME, JOB_KIND_EVENTS, QUEUE_BLOCK_PROCESSING, QUEUE_EVENT_PROCESSING, QUEUE_HISTORICAL_PROCESSING } from './constants';
 import { createPruningJob, processBlockByNumber } from './common';
 import { OrderDirection } from './database';
+import { HISTORICAL_BLOCKS_BATCH_SIZE, HistoricalJobData } from './job-runner';
 
 const EVENT = 'event';
 
@@ -26,6 +29,7 @@ export class EventWatcher {
 
   _shutDown = false;
   _signalCount = 0;
+  _historicalProcessingEndBlockNumber = 0;
 
   constructor (ethClient: EthClient, indexer: IndexerInterface, pubsub: PubSub, jobQueue: JobQueue) {
     this._ethClient = ethClient;
@@ -44,6 +48,7 @@ export class EventWatcher {
 
   async start (): Promise<void> {
     await this.initBlockProcessingOnCompleteHandler();
+    await this.initHistoricalProcessingOnCompleteHandler();
     await this.initEventProcessingOnCompleteHandler();
 
     this.startBlockProcessing();
@@ -57,6 +62,12 @@ export class EventWatcher {
     });
   }
 
+  async initHistoricalProcessingOnCompleteHandler (): Promise<void> {
+    this._jobQueue.onComplete(QUEUE_HISTORICAL_PROCESSING, async (job) => {
+      await this.historicalProcessingCompleteHandler(job);
+    });
+  }
+
   async initEventProcessingOnCompleteHandler (): Promise<void> {
     await this._jobQueue.onComplete(QUEUE_EVENT_PROCESSING, async (job) => {
       await this.eventProcessingCompleteHandler(job);
@@ -64,17 +75,44 @@ export class EventWatcher {
   }
 
   async startBlockProcessing (): Promise<void> {
-    const syncStatus = await this._indexer.getSyncStatus();
-    let startBlockNumber: number;
+    // Get latest block in chain and sync status from DB.
+    const [{ block: latestBlock }, syncStatus] = await Promise.all([
+      this._ethClient.getBlockByHash(),
+      this._indexer.getSyncStatus()
+    ]);
 
-    if (!syncStatus) {
-      // Get latest block in chain.
-      const { block: currentBlock } = await this._ethClient.getBlockByHash();
-      startBlockNumber = currentBlock.number;
-    } else {
+    const latestCanonicalBlockNumber = latestBlock.number - MAX_REORG_DEPTH;
+    let startBlockNumber = latestBlock.number;
+
+    if (syncStatus) {
       startBlockNumber = syncStatus.chainHeadBlockNumber + 1;
     }
 
+    // Check if starting block for watcher is before latest canonical block
+    if (startBlockNumber < latestCanonicalBlockNumber) {
+      await this.startHistoricalBlockProcessing(startBlockNumber, latestCanonicalBlockNumber);
+
+      return;
+    }
+
+    await this.startRealtimeBlockProcessing(startBlockNumber);
+  }
+
+  async startHistoricalBlockProcessing (startBlockNumber: number, endBlockNumber: number): Promise<void> {
+    this._historicalProcessingEndBlockNumber = endBlockNumber;
+    log(`Starting historical block processing up to block ${this._historicalProcessingEndBlockNumber}`);
+
+    // Push job for historical block processing
+    await this._jobQueue.pushJob(
+      QUEUE_HISTORICAL_PROCESSING,
+      {
+        blockNumber: startBlockNumber
+      }
+    );
+  }
+
+  async startRealtimeBlockProcessing (startBlockNumber: number): Promise<void> {
+    log(`Starting realtime block processing from block ${startBlockNumber}`);
     await processBlockByNumber(this._jobQueue, startBlockNumber);
 
     // Creating an AsyncIterable from AsyncIterator to iterate over the values.
@@ -139,6 +177,67 @@ export class EventWatcher {
     }
   }
 
+  async historicalProcessingCompleteHandler (job: PgBoss.Job<any>): Promise<void> {
+    const { id, data: { failed, request: { data } } } = job;
+    const { blockNumber }: HistoricalJobData = data;
+
+    if (failed) {
+      log(`Job ${id} for queue ${QUEUE_HISTORICAL_PROCESSING} failed`);
+      return;
+    }
+
+    // TODO: Get batch size from config
+    const nextBatchStartBlockNumber = blockNumber + HISTORICAL_BLOCKS_BATCH_SIZE + 1;
+    log(`Historical block processing completed for block range: ${blockNumber} to ${nextBatchStartBlockNumber}`);
+
+    // Check if historical processing endBlock / latest canonical block is reached
+    if (nextBatchStartBlockNumber > this._historicalProcessingEndBlockNumber) {
+      let newSyncStatusBlock: {
+        blockNumber: number;
+        blockHash: string;
+      } | undefined;
+
+      // Fetch latest processed block from DB
+      const latestProcessedBlock = await this._indexer.getLatestProcessedBlockProgress(false);
+
+      if (latestProcessedBlock) {
+        if (latestProcessedBlock.blockNumber > this._historicalProcessingEndBlockNumber) {
+          // Set new sync status to latest processed block
+          newSyncStatusBlock = {
+            blockHash: latestProcessedBlock.blockHash,
+            blockNumber: latestProcessedBlock.blockNumber
+          };
+        }
+      }
+
+      if (!newSyncStatusBlock) {
+        const [block] = await this._indexer.getBlocks({ blockNumber: this._historicalProcessingEndBlockNumber });
+
+        newSyncStatusBlock = {
+          // At latestCanonicalBlockNumber height null block might be returned in case of FEVM
+          blockHash: block ? block.blockHash : constants.AddressZero,
+          blockNumber: this._historicalProcessingEndBlockNumber
+        };
+      }
+
+      // Update sync status to max of latest processed block or latest canonical block
+      const syncStatus = await this._indexer.forceUpdateSyncStatus(newSyncStatusBlock.blockHash, newSyncStatusBlock.blockNumber);
+      log(`Sync status canonical block updated to ${syncStatus.latestCanonicalBlockNumber}`);
+      // Start realtime processing
+      this.startBlockProcessing();
+
+      return;
+    }
+
+    // Push job for next batch of blocks
+    await this._jobQueue.pushJob(
+      QUEUE_HISTORICAL_PROCESSING,
+      {
+        blockNumber: nextBatchStartBlockNumber
+      }
+    );
+  }
+
   async eventProcessingCompleteHandler (job: any): Promise<void> {
     const { id, data: { request, failed, state, createdOn } } = job;
 

packages/util/src/fill.ts

@@ -130,7 +130,13 @@ const prefetchBlocks = async (
       const blockProgress = await indexer.getBlockProgress(blockHash);
 
       if (!blockProgress) {
-        await indexer.saveBlockAndFetchEvents({ cid, blockHash, blockNumber, parentHash, blockTimestamp: timestamp });
+        await indexer.saveBlockAndFetchEvents({
+          cid,
+          blockHash,
+          blockNumber: Number(blockNumber),
+          parentHash,
+          blockTimestamp: Number(timestamp)
+        });
       }
     });
 

packages/util/src/index-block.ts

@@ -22,7 +22,8 @@ export const indexBlock = async (
     const blocks = await indexer.getBlocks({ blockNumber: argv.block });
 
     blockProgressEntities = blocks.map((block: any): Partial<BlockProgressInterface> => {
-      block.blockTimestamp = block.timestamp;
+      block.blockTimestamp = Number(block.timestamp);
+      block.blockNumber = Number(block.blockNumber);
 
       return block;
     });

packages/util/src/indexer.ts

@@ -194,6 +194,23 @@ export class Indexer {
     return res;
   }
 
+  async forceUpdateSyncStatus (blockHash: string, blockNumber: number): Promise<SyncStatusInterface> {
+    const dbTx = await this._db.createTransactionRunner();
+    let res;
+
+    try {
+      res = await this._db.forceUpdateSyncStatus(dbTx, blockHash, blockNumber);
+      await dbTx.commitTransaction();
+    } catch (error) {
+      await dbTx.rollbackTransaction();
+      throw error;
+    } finally {
+      await dbTx.release();
+    }
+
+    return res;
+  }
+
   async getBlocks (blockFilter: { blockNumber?: number, blockHash?: string }): Promise<any> {
     assert(blockFilter.blockHash || blockFilter.blockNumber);
     const result = await this._ethClient.getBlocks(blockFilter);

packages/util/src/job-queue.ts

@@ -13,7 +13,7 @@ interface Config {
   maxCompletionLag: number
 }
 
-type JobCallback = (job: any) => Promise<void>;
+type JobCallback = (job: PgBoss.JobWithDoneCallback<any, any>) => Promise<void>;
 
 const JOBS_PER_INTERVAL = 5;
 
@@ -93,7 +93,7 @@ export class JobQueue {
         teamSize: JOBS_PER_INTERVAL,
         teamConcurrency: 1
       },
-      async (job: any) => {
+      async (job) => {
         try {
           log(`Processing queue ${queue} job ${job.id}...`);
           await callback(job);
@@ -114,7 +114,7 @@ export class JobQueue {
         teamSize: JOBS_PER_INTERVAL,
         teamConcurrency: 1
       },
-      async (job: any) => {
+      async (job: PgBoss.JobWithDoneCallback<any, any>) => {
         try {
           const { id, data: { failed, createdOn } } = job;
           log(`Job onComplete for queue ${queue} job ${id} created ${createdOn} success ${!failed}`);
@@ -128,7 +128,7 @@ export class JobQueue {
     );
   }
 
-  async markComplete (job: any): Promise<void> {
+  async markComplete (job: PgBoss.Job): Promise<void> {
     this._boss.complete(job.id);
   }
 

packages/util/src/job-runner.ts

@@ -6,6 +6,7 @@ import assert from 'assert';
 import debug from 'debug';
 import { ethers } from 'ethers';
 import { DeepPartial, In } from 'typeorm';
+import PgBoss from 'pg-boss';
 
 import { JobQueueConfig } from './config';
 import {
@@ -17,7 +18,8 @@ import {
   QUEUE_BLOCK_PROCESSING,
   QUEUE_EVENT_PROCESSING,
   QUEUE_BLOCK_CHECKPOINT,
-  QUEUE_HOOKS
+  QUEUE_HOOKS,
+  QUEUE_HISTORICAL_PROCESSING
 } from './constants';
 import { JobQueue } from './job-queue';
 import { BlockProgressInterface, EventInterface, IndexerInterface } from './types';
@@ -34,6 +36,16 @@ import { lastBlockNumEvents, lastBlockProcessDuration, lastProcessedBlockNumber
 
 const log = debug('vulcanize:job-runner');
 
+// Wait time for retrying events processing on error (in ms)
+const EVENTS_PROCESSING_RETRY_WAIT = 2000;
+
+// TODO: Get batch size from config
+export const HISTORICAL_BLOCKS_BATCH_SIZE = 100;
+
+export interface HistoricalJobData {
+  blockNumber: number;
+}
+
 export class JobRunner {
   jobQueue: JobQueue;
   _indexer: IndexerInterface;
@@ -57,6 +69,12 @@ export class JobRunner {
     });
   }
 
+  async subscribeHistoricalProcessingQueue (): Promise<void> {
+    await this.jobQueue.subscribe(QUEUE_HISTORICAL_PROCESSING, async (job) => {
+      await this.processHistoricalBlocks(job);
+    });
+  }
+
   async subscribeEventProcessingQueue (): Promise<void> {
     await this.jobQueue.subscribe(QUEUE_EVENT_PROCESSING, async (job) => {
       await this.processEvent(job);
@@ -129,6 +147,28 @@ export class JobRunner {
     await this.jobQueue.markComplete(job);
   }
 
+  async processHistoricalBlocks (job: PgBoss.JobWithDoneCallback<HistoricalJobData, HistoricalJobData>): Promise<void> {
+    const { data: { blockNumber: startBlock } } = job;
+    const endBlock = startBlock + HISTORICAL_BLOCKS_BATCH_SIZE;
+
+    log(`Processing historical blocks from ${startBlock} to ${endBlock}`);
+    // TODO: Use method from common.ts to fetch and save filtered logs and blocks
+    const blocks: BlockProgressInterface[] = [];
+
+    // Push event processing job for each block
+    const pushJobForBlockPromises = blocks.map(async block => this.jobQueue.pushJob(
+      QUEUE_EVENT_PROCESSING,
+      {
+        kind: JOB_KIND_EVENTS,
+        blockHash: block.blockHash,
+        publish: true
+      }
+    ));
+
+    await Promise.all(pushJobForBlockPromises);
+    await this.jobQueue.markComplete(job);
+  }
+
   async processEvent (job: any): Promise<EventInterface | void> {
     const { data: { kind } } = job;
 
@@ -360,8 +400,9 @@ export class JobRunner {
     console.timeEnd('time:job-runner#_indexBlock-get-block-progress-entities');
 
     // Check if parent block has been processed yet, if not, push a high priority job to process that first and abort.
-    // However, don't go beyond the `latestCanonicalBlockHash` from SyncStatus as we have to assume the reorg can't be that deep.
-    if (blockHash !== syncStatus.latestCanonicalBlockHash) {
+    // However, don't go beyond the `latestCanonicalBlockNumber` from SyncStatus as we have to assume the reorg can't be that deep.
+    // latestCanonicalBlockNumber is used to handle null blocks in case of FEVM.
+    if (blockNumber > syncStatus.latestCanonicalBlockNumber) {
       // Create a higher priority job to index parent block and then abort.
       // We don't have to worry about aborting as this job will get retried later.
       const newPriority = (priority || 0) + 1;
@@ -382,9 +423,9 @@ export class JobRunner {
           kind: JOB_KIND_INDEX,
           cid: parentCid,
           blockHash: parentHash,
-          blockNumber: parentBlockNumber,
+          blockNumber: Number(parentBlockNumber),
           parentHash: grandparentHash,
-          timestamp: parentTimestamp,
+          timestamp: Number(parentTimestamp),
           priority: newPriority
         }, { priority: newPriority });
 
@@ -418,8 +459,6 @@ export class JobRunner {
         await this._indexer.removeUnknownEvents(parentBlock);
         console.timeEnd('time:job-runner#_indexBlock-remove-unknown-events');
       }
-    } else {
-      blockProgress = parentBlock;
     }
 
     if (!blockProgress) {
@@ -442,7 +481,9 @@ export class JobRunner {
       }
     }
 
-    await this._indexer.processBlock(blockProgress);
+    if (!blockProgress.isComplete) {
+      await this._indexer.processBlock(blockProgress);
+    }
 
     // Push job to event processing queue.
     // Block with all events processed or no events will not be processed again due to check in _processEvents.
@@ -455,40 +496,62 @@ export class JobRunner {
   async _processEvents (job: any): Promise<void> {
     const { blockHash } = job.data;
 
-    if (!this._blockAndEventsMap.has(blockHash)) {
-      console.time('time:job-runner#_processEvents-get-block-progress');
-      const block = await this._indexer.getBlockProgress(blockHash);
-      console.timeEnd('time:job-runner#_processEvents-get-block-progress');
+    try {
+      if (!this._blockAndEventsMap.has(blockHash)) {
+        console.time('time:job-runner#_processEvents-get-block-progress');
+        const block = await this._indexer.getBlockProgress(blockHash);
+        console.timeEnd('time:job-runner#_processEvents-get-block-progress');
 
-      assert(block);
-      this._blockAndEventsMap.set(blockHash, { block, events: [] });
-    }
+        assert(block);
+        this._blockAndEventsMap.set(blockHash, { block, events: [] });
+      }
 
-    const prefetchedBlock = this._blockAndEventsMap.get(blockHash);
-    assert(prefetchedBlock);
+      const prefetchedBlock = this._blockAndEventsMap.get(blockHash);
+      assert(prefetchedBlock);
 
-    const { block } = prefetchedBlock;
+      const { block } = prefetchedBlock;
 
-    console.time('time:job-runner#_processEvents-events');
-    await processBatchEvents(this._indexer, block, this._jobQueueConfig.eventsInBatch, this._jobQueueConfig.subgraphEventsOrder);
-    console.timeEnd('time:job-runner#_processEvents-events');
+      console.time('time:job-runner#_processEvents-events');
+      await processBatchEvents(this._indexer, block, this._jobQueueConfig.eventsInBatch, this._jobQueueConfig.subgraphEventsOrder);
+      console.timeEnd('time:job-runner#_processEvents-events');
 
-    // Update metrics
-    lastProcessedBlockNumber.set(block.blockNumber);
-    lastBlockNumEvents.set(block.numEvents);
+      // Update metrics
+      lastProcessedBlockNumber.set(block.blockNumber);
+      lastBlockNumEvents.set(block.numEvents);
 
-    this._blockAndEventsMap.delete(block.blockHash);
+      this._blockAndEventsMap.delete(block.blockHash);
 
-    if (this._endBlockProcessTimer) {
-      this._endBlockProcessTimer();
-    }
+      if (this._endBlockProcessTimer) {
+        this._endBlockProcessTimer();
+      }
 
-    this._endBlockProcessTimer = lastBlockProcessDuration.startTimer();
+      this._endBlockProcessTimer = lastBlockProcessDuration.startTimer();
 
-    if (this._shutDown) {
-      log(`Graceful shutdown after processing block ${block.blockNumber}`);
-      this.jobQueue.stop();
-      process.exit(0);
+      if (this._shutDown) {
+        log(`Graceful shutdown after processing block ${block.blockNumber}`);
+        this.jobQueue.stop();
+        process.exit(0);
+      }
+    } catch (error) {
+      log(`Error in processing events for block ${blockHash}`);
+      log(error);
+
+      // TODO: Remove processed entities for current block to avoid reprocessing of events
+
+      // Catch event processing error and push to job queue after some time with higher priority
+      log(`Retrying event processing after ${EVENTS_PROCESSING_RETRY_WAIT} ms`);
+      await wait(EVENTS_PROCESSING_RETRY_WAIT);
+      await this.jobQueue.pushJob(
+        QUEUE_EVENT_PROCESSING,
+        {
+          kind: JOB_KIND_EVENTS,
+          blockHash: blockHash,
+          publish: true
+        },
+        {
+          priority: 1
+        }
+      );
     }
   }
 

packages/util/src/types.ts

@@ -91,6 +91,7 @@ export interface IndexerInterface {
   getStateSyncStatus (): Promise<StateSyncStatusInterface | undefined>
   getBlocks (blockFilter: { blockHash?: string, blockNumber?: number }): Promise<any>
   getBlocksAtHeight (height: number, isPruned: boolean): Promise<BlockProgressInterface[]>
+  getLatestProcessedBlockProgress (isPruned: boolean): Promise<BlockProgressInterface | undefined>
   getLatestCanonicalBlock (): Promise<BlockProgressInterface | undefined>
   getLatestStateIndexedBlock (): Promise<BlockProgressInterface>
   getBlockEvents (blockHash: string, where: Where, queryOptions: QueryOptions): Promise<Array<EventInterface>>
@@ -102,6 +103,7 @@ export interface IndexerInterface {
   updateSyncStatusChainHead (blockHash: string, blockNumber: number, force?: boolean): Promise<SyncStatusInterface>
   updateSyncStatusIndexedBlock (blockHash: string, blockNumber: number, force?: boolean): Promise<SyncStatusInterface>
   updateSyncStatusCanonicalBlock (blockHash: string, blockNumber: number, force?: boolean): Promise<SyncStatusInterface>
+  forceUpdateSyncStatus (blockHash: string, blockNumber: number): Promise<SyncStatusInterface>
   updateStateSyncStatusIndexedBlock (blockNumber: number, force?: boolean): Promise<StateSyncStatusInterface | undefined>
   updateStateSyncStatusCheckpointBlock (blockNumber: number, force?: boolean): Promise<StateSyncStatusInterface>
   markBlocksAsPruned (blocks: BlockProgressInterface[]): Promise<void>
@@ -164,6 +166,7 @@ export interface DatabaseInterface {
   updateSyncStatusIndexedBlock (queryRunner: QueryRunner, blockHash: string, blockNumber: number, force?: boolean): Promise<SyncStatusInterface>;
   updateSyncStatusChainHead (queryRunner: QueryRunner, blockHash: string, blockNumber: number, force?: boolean): Promise<SyncStatusInterface>;
   updateSyncStatusCanonicalBlock (queryRunner: QueryRunner, blockHash: string, blockNumber: number, force?: boolean): Promise<SyncStatusInterface>;
+  forceUpdateSyncStatus (queryRunner: QueryRunner, blockHash: string, blockNumber: number): Promise<SyncStatusInterface>;
   saveEvents (queryRunner: QueryRunner, events: DeepPartial<EventInterface>[]): Promise<void>;
   saveBlockWithEvents (queryRunner: QueryRunner, block: DeepPartial<BlockProgressInterface>, events: DeepPartial<EventInterface>[]): Promise<BlockProgressInterface>;
   saveEventEntity (queryRunner: QueryRunner, entity: EventInterface): Promise<EventInterface>;