Fetch event logs for a block range in a single upstream call (#433)

* Support fetching logs for a block range in rpc-eth-client

* Add a method to fetch block events for multiple blocks at once

* Add a method to save blocks with fetched events in a block range

* Fix transactions destructuring

* Fix get logs call args

* Add a separate ETH client method to get logs in a block range

* Codegen changes

packages/codegen/src/data/entities/BlockProgress.yaml

@@ -16,6 +16,9 @@ columns:
     pgType: varchar
     tsType: string
     columnType: Column
+    columnOptions:
+      - option: nullable
+        value: true
   - name: blockHash
     pgType: varchar
     tsType: string

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

@@ -625,6 +625,10 @@ export class Indexer implements IndexerInterface {
     return this._baseIndexer.getBlocksAtHeight(height, isPruned);
   }
 
+  async fetchEventsAndSaveBlocks (blocks: DeepPartial<BlockProgress>[]): Promise<{ blockProgress: BlockProgress, events: DeepPartial<Event>[] }[]> {
+    return this._baseIndexer.fetchEventsAndSaveBlocks(blocks, this.parseEventNameAndArgs.bind(this))
+  }
+
   async saveBlockAndFetchEvents (block: DeepPartial<BlockProgress>): Promise<[BlockProgress, DeepPartial<Event>[]]> {
     return this._saveBlockAndFetchEvents(block);
   }

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

@@ -106,6 +106,12 @@ export class Indexer implements IndexerInterface {
     return '';
   }
 
+  async fetchEventsAndSaveBlocks (blocks: DeepPartial<BlockProgressInterface>[]): Promise<{ blockProgress: BlockProgressInterface, events: DeepPartial<EventInterface>[] }[]> {
+    assert(blocks);
+
+    return [];
+  }
+
   async saveBlockAndFetchEvents (block: BlockProgressInterface): Promise<[BlockProgressInterface, DeepPartial<EventInterface>[]]> {
     return [block, []];
   }

packages/ipld-eth-client/src/eth-client.ts

@@ -144,6 +144,9 @@ export class EthClient implements EthClientInterface {
     return { logs: getLogs };
   }
 
+  // TODO: Implement
+  // async getLogsForBlockRange(): Promise<any> {}
+
   async _getCachedOrFetch (queryName: keyof typeof ethQueries, vars: Vars): Promise<any> {
     const keyObj = {
       queryName,

packages/rpc-eth-client/src/eth-client.ts

@@ -21,6 +21,8 @@ interface Vars {
   contract?: string;
   slot?: string;
   addresses?: string[];
+  fromBlock?: number;
+  toBlock?: number;
 }
 
 export class EthClient implements EthClientInterface {
@@ -230,17 +232,47 @@ export class EthClient implements EthClientInterface {
     };
   }
 
-  async getLogs (vars: { blockHash: string, blockNumber: string, addresses?: string[] }): Promise<any> {
-    const { blockNumber, addresses = [] } = vars;
+  async getLogs (vars: {
+    blockHash: string,
+    blockNumber: string,
+    addresses?: string[]
+  }): Promise<any> {
+    const blockNumber = Number(vars.blockNumber);
 
     console.time(`time:eth-client#getLogs-${JSON.stringify(vars)}`);
+    const result = await this._getLogs({ fromBlock: blockNumber, toBlock: blockNumber, addresses: vars.addresses });
+    console.timeEnd(`time:eth-client#getLogs-${JSON.stringify(vars)}`);
+
+    return result;
+  }
+
+  async getLogsForBlockRange (vars: {
+    fromBlock?: number,
+    toBlock?: number,
+    addresses?: string[]
+  }): Promise<any> {
+    console.time(`time:eth-client#getLogsForBlockRange-${JSON.stringify(vars)}`);
+    const result = await this._getLogs({ fromBlock: Number(vars.fromBlock), toBlock: Number(vars.toBlock), addresses: vars.addresses });
+    console.timeEnd(`time:eth-client#getLogsForBlockRange-${JSON.stringify(vars)}`);
+
+    return result;
+  }
+
+  // TODO: Implement return type
+  async _getLogs (vars: {
+    fromBlock?: number,
+    toBlock?: number,
+    addresses?: string[]
+  }): Promise<any> {
+    const { fromBlock, toBlock, addresses = [] } = vars;
+
     const result = await this._getCachedOrFetch(
       'getLogs',
       vars,
       async () => {
         const logsByAddressPromises = addresses?.map(address => this._provider.getLogs({
-          fromBlock: Number(blockNumber),
-          toBlock: Number(blockNumber),
+          fromBlock,
+          toBlock,
           address
         }));
         const logsByAddress = await Promise.all(logsByAddressPromises);
@@ -249,8 +281,8 @@ export class EthClient implements EthClientInterface {
         // If no addresses provided to filter
         if (!logs.length) {
           logs = await this._provider.getLogs({
-            fromBlock: Number(blockNumber),
-            toBlock: Number(blockNumber)
+            fromBlock,
+            toBlock
           });
         }
 
@@ -272,10 +304,11 @@ export class EthClient implements EthClientInterface {
       acc.set(txReceipt.transactionHash, txReceipt);
       return acc;
     }, new Map<string, providers.TransactionReceipt>());
-    console.timeEnd(`time:eth-client#getLogs-${JSON.stringify(vars)}`);
 
     return {
       logs: result.map((log) => ({
+        // blockHash required for sorting logs fetched in a block range
+        blockHash: log.blockHash,
         account: {
           address: log.address
         },

packages/util/src/common.ts

@@ -196,34 +196,22 @@ export const _fetchBatchBlocks = async (
     await wait(jobQueueConfig.blockDelayInMilliSecs);
   }
 
+  // Flatten array as there can be multiple blocks at the same height
   blocks = blocks.flat();
 
   if (jobQueueConfig.jobDelayInMilliSecs) {
     await wait(jobQueueConfig.jobDelayInMilliSecs);
   }
 
-  console.time('time:common#fetchBatchBlocks-saveBlockAndFetchEvents');
-  const blockAndEventsPromises = blocks.map(async block => {
+  blocks.forEach(block => {
     block.blockTimestamp = block.timestamp;
-
-    try {
-      log(`_fetchBatchBlocks#saveBlockAndFetchEvents: fetching from upstream server ${block.blockHash}`);
-      const [blockProgress, events] = await indexer.saveBlockAndFetchEvents(block);
-      log(`_fetchBatchBlocks#saveBlockAndFetchEvents: fetched for block: ${blockProgress.blockHash} num events: ${blockProgress.numEvents}`);
-      return { blockProgress, events };
-    } catch (error) {
-      log(error);
-      return null;
-    }
   });
 
-  const blockAndEventsList = await Promise.all(blockAndEventsPromises);
-  console.timeEnd('time:common#fetchBatchBlocks-saveBlockAndFetchEvents');
+  console.time('time:common#fetchBatchBlocks-fetchEventsAndSaveBlocks');
+  const blockAndEventsList = await indexer.fetchEventsAndSaveBlocks(blocks);
+  console.timeEnd('time:common#fetchBatchBlocks-fetchEventsAndSaveBlocks');
 
-  return blockAndEventsList.filter(blockAndEvent => blockAndEvent !== null) as {
-    blockProgress: BlockProgressInterface,
-    events: DeepPartial<EventInterface>[]
-  }[];
+  return blockAndEventsList;
 };
 
 /**

packages/util/src/indexer.ts

@@ -263,6 +263,117 @@ export class Indexer {
     return this._db.getEvent(id);
   }
 
+  // For each of the given blocks, fetches events and saves them along with the block to db
+  // Returns an array with [block, events] for all the given blocks
+  async fetchEventsAndSaveBlocks (blocks: DeepPartial<BlockProgressInterface>[], parseEventNameAndArgs: (kind: string, logObj: any) => any): Promise<{ blockProgress: BlockProgressInterface, events: DeepPartial<EventInterface>[] }[]> {
+    const fromBlock = blocks[0].blockNumber;
+    const toBlock = blocks[blocks.length - 1].blockNumber;
+    log(`fetchEventsAndSaveBlocks#fetchEventsForBlocks: fetching from upstream server for range [${fromBlock}, ${toBlock}]`);
+
+    const dbEventsMap = await this.fetchEventsForBlocks(blocks, parseEventNameAndArgs);
+
+    const blocksWithEventsPromises = blocks.map(async block => {
+      const blockHash = block.blockHash;
+      assert(blockHash);
+
+      const blockToSave = {
+        cid: block.cid,
+        blockHash: block.blockHash,
+        blockNumber: block.blockNumber,
+        blockTimestamp: block.blockTimestamp,
+        parentHash: block.parentHash
+      };
+
+      const dbEvents = dbEventsMap.get(blockHash) || [];
+      const [blockProgress] = await this.saveBlockWithEvents(blockToSave, dbEvents);
+      log(`fetchEventsAndSaveBlocks#fetchEventsForBlocks: fetched for block: ${blockHash} num events: ${blockProgress.numEvents}`);
+
+      return { blockProgress, events: [] };
+    });
+
+    return Promise.all(blocksWithEventsPromises);
+  }
+
+  // Fetch events (to be saved to db) for a block range
+  async fetchEventsForBlocks (blocks: DeepPartial<BlockProgressInterface>[], parseEventNameAndArgs: (kind: string, logObj: any) => any): Promise<Map<string, DeepPartial<EventInterface>[]>> {
+    if (!blocks.length) {
+      return new Map();
+    }
+
+    // Fetch logs for block range of given blocks
+    let logsPromise: Promise<any>;
+    const fromBlock = blocks[0].blockNumber;
+    const toBlock = blocks[blocks.length - 1].blockNumber;
+
+    assert(this._ethClient.getLogsForBlockRange, 'getLogsForBlockRange() not implemented in ethClient');
+    if (this._serverConfig.filterLogs) {
+      const watchedContracts = this.getWatchedContracts();
+      const addresses = watchedContracts.map((watchedContract): string => {
+        return watchedContract.address;
+      });
+
+      logsPromise = this._ethClient.getLogsForBlockRange({
+        fromBlock,
+        toBlock,
+        addresses
+      });
+    } else {
+      logsPromise = this._ethClient.getLogsForBlockRange({ fromBlock, toBlock });
+    }
+
+    // Fetch transactions for given blocks
+    const transactionsMap: Map<string, any> = new Map();
+    const transactionPromises = blocks.map(async (block) => {
+      assert(block.blockHash);
+
+      const blockWithTransactions = await this._ethClient.getBlockWithTransactions({ blockHash: block.blockHash, blockNumber: block.blockNumber });
+      const {
+        allEthHeaderCids: {
+          nodes: [
+            {
+              ethTransactionCidsByHeaderId: {
+                nodes: transactions
+              }
+            }
+          ]
+        }
+      } = blockWithTransactions;
+
+      transactionsMap.set(block.blockHash, transactions);
+    });
+
+    const [{ logs }] = await Promise.all([logsPromise, ...transactionPromises]);
+
+    // Sort logs according to blockhash
+    const logsMap: Map<string, any> = new Map();
+    logs.forEach((log: any) => {
+      const { blockHash: logBlockHash } = log;
+      assert(typeof logBlockHash === 'string');
+
+      if (!logsMap.has(logBlockHash)) {
+        logsMap.set(logBlockHash, []);
+      }
+
+      logsMap.get(logBlockHash).push(log);
+    });
+
+    // Map db ready events according to blockhash
+    const dbEventsMap: Map<string, DeepPartial<EventInterface>[]> = new Map();
+    blocks.forEach(block => {
+      const blockHash = block.blockHash;
+      assert(blockHash);
+
+      const logs = logsMap.get(blockHash) || [];
+      const transactions = transactionsMap.get(blockHash);
+
+      const dbEvents = this.createDbEventsFromLogsAndTxs(blockHash, logs, transactions, parseEventNameAndArgs);
+      dbEventsMap.set(blockHash, dbEvents);
+    });
+
+    return dbEventsMap;
+  }
+
+  // Fetch events (to be saved to db) for a particular block
   async fetchEvents (blockHash: string, blockNumber: number, parseEventNameAndArgs: (kind: string, logObj: any) => any): Promise<DeepPartial<EventInterface>[]> {
     let logsPromise: Promise<any>;
 
@@ -298,6 +409,11 @@ export class Indexer {
       }
     ] = await Promise.all([logsPromise, transactionsPromise]);
 
+    return this.createDbEventsFromLogsAndTxs(blockHash, logs, transactions, parseEventNameAndArgs);
+  }
+
+  // Create events to be saved to db for a block given blockHash, logs, transactions and a parser function
+  createDbEventsFromLogsAndTxs (blockHash: string, logs: any, transactions: any, parseEventNameAndArgs: (kind: string, logObj: any) => any): DeepPartial<EventInterface>[] {
     const transactionMap = transactions.reduce((acc: {[key: string]: any}, transaction: {[key: string]: any}) => {
       acc[transaction.txHash] = transaction;
       return acc;
@@ -365,6 +481,23 @@ export class Indexer {
     return dbEvents;
   }
 
+  async saveBlockWithEvents (block: DeepPartial<BlockProgressInterface>, events: DeepPartial<EventInterface>[]): Promise<[BlockProgressInterface, DeepPartial<EventInterface>[]]> {
+    const dbTx = await this._db.createTransactionRunner();
+    try {
+      console.time(`time:indexer#_saveBlockWithEvents-db-save-${block.blockNumber}`);
+      const blockProgress = await this._db.saveBlockWithEvents(dbTx, block, events);
+      await dbTx.commitTransaction();
+      console.timeEnd(`time:indexer#_saveBlockWithEvents-db-save-${block.blockNumber}`);
+
+      return [blockProgress, []];
+    } catch (error) {
+      await dbTx.rollbackTransaction();
+      throw error;
+    } finally {
+      await dbTx.release();
+    }
+  }
+
   async saveBlockProgress (block: DeepPartial<BlockProgressInterface>): Promise<BlockProgressInterface> {
     const dbTx = await this._db.createTransactionRunner();
     let res;

packages/util/src/types.ts

@@ -95,6 +95,7 @@ export interface IndexerInterface {
   getLatestStateIndexedBlock (): Promise<BlockProgressInterface>
   getBlockEvents (blockHash: string, where: Where, queryOptions: QueryOptions): Promise<Array<EventInterface>>
   getAncestorAtDepth (blockHash: string, depth: number): Promise<string>
+  fetchEventsAndSaveBlocks (blocks: DeepPartial<BlockProgressInterface>[]): Promise<{ blockProgress: BlockProgressInterface, events: DeepPartial<EventInterface>[] }[]>
   saveBlockAndFetchEvents (block: DeepPartial<BlockProgressInterface>): Promise<[BlockProgressInterface, DeepPartial<EventInterface>[]]>
   removeUnknownEvents (block: BlockProgressInterface): Promise<void>
   updateBlockProgress (block: BlockProgressInterface, lastProcessedEventIndex: number): Promise<BlockProgressInterface>
@@ -219,6 +220,11 @@ export interface EthClient {
     blockNumber: string,
     addresses?: string[]
   }): Promise<any>;
+  getLogsForBlockRange?: (vars: {
+    fromBlock?: number,
+    toBlock?: number,
+    addresses?: string[]
+  }) => Promise<any>;
 }
 
 export type Clients = {