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);
   }