Add required codegen template

packages/cli/src/backfill-events-data.ts

@@ -9,6 +9,7 @@ import { ConnectionOptions, Repository } from 'typeorm';
 import debug from 'debug';
 
 import { DEFAULT_CONFIG_PATH, JSONbigNative, DatabaseInterface, Config, EventInterface } from '@cerc-io/util';
+
 import { BaseCmd } from './base';
 
 const log = debug('vulcanize:backfill-events-data');

packages/codegen/src/backfill-events-data.ts

@@ -0,0 +1,21 @@
+//
+// Copyright 2024 Vulcanize, Inc.
+//
+
+import fs from 'fs';
+import path from 'path';
+import Handlebars from 'handlebars';
+import { Writable } from 'stream';
+
+const TEMPLATE_FILE = './templates/backfill-events-data-template.handlebars';
+
+/**
+ * Writes the backfill-events-data file generated from a template to a stream.
+ * @param outStream A writable output stream to write the backfill-events-data file to.
+ */
+export function exportBackfillEventsData (outStream: Writable): void {
+  const templateString = fs.readFileSync(path.resolve(__dirname, TEMPLATE_FILE)).toString();
+  const template = Handlebars.compile(templateString);
+  const content = template({});
+  outStream.write(content);
+}

packages/codegen/src/generate-code.ts

@@ -40,6 +40,7 @@ import { exportIndexBlock } from './index-block';
 import { exportSubscriber } from './subscriber';
 import { exportReset } from './reset';
 import { filterInheritedContractNodes, writeFileToStream } from './utils/helpers';
+import { exportBackfillEventsData } from './backfill-events-data';
 
 const main = async (): Promise<void> => {
   const argv = await yargs(hideBin(process.argv))
@@ -389,6 +390,11 @@ function generateWatcher (visitor: Visitor, contracts: any[], configFile: string
     : process.stdout;
   exportIndexBlock(outStream);
 
+  outStream = outputDir
+    ? fs.createWriteStream(path.join(outputDir, 'src/cli/backfill-events-data.ts'))
+    : process.stdout;
+  exportBackfillEventsData(outStream);
+
   if (config.subgraphPath) {
     outStream = outputDir
       ? fs.createWriteStream(path.join(outputDir, 'src/entity/Subscriber.ts'))

packages/codegen/src/templates/backfill-events-data-template.handlebars

@@ -0,0 +1,26 @@
+//
+// Copyright 2024 Vulcanize, Inc.
+//
+
+import 'reflect-metadata';
+import debug from 'debug';
+
+import { BackfillEventsDataCmd } from '@cerc-io/cli';
+
+import { Database } from '../database';
+import { Event } from '../entity/Event';
+
+const log = debug('vulcanize:backfill-events-data');
+
+const main = async (): Promise<void> => {
+  const backFillCmd = new BackfillEventsDataCmd();
+  await backFillCmd.init(Database);
+
+  await backFillCmd.exec(Event);
+};
+
+main().catch(err => {
+  log(err);
+}).finally(() => {
+  process.exit(0);
+});