From afebfccbc47f76f5bb04a46bb0b2d841a5cf727e Mon Sep 17 00:00:00 2001
From: Kazuhiro Sera <seratch@gmail.com>
Date: Fri, 6 Aug 2021 07:30:25 +0900
Subject: [PATCH] Fix #1038 by making the AwsLambdaReceiver example TS
 compatible

---
 examples/deploy-aws-lambda/app.js       | 2 +-
 src/App.ts                              | 1 +
 src/receivers/AwsLambdaReceiver.spec.ts | 3 ++-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/examples/deploy-aws-lambda/app.js b/examples/deploy-aws-lambda/app.js
index 87e7fd972..926f19677 100644
--- a/examples/deploy-aws-lambda/app.js
+++ b/examples/deploy-aws-lambda/app.js
@@ -57,6 +57,6 @@ app.message('goodbye', async ({ message, say }) => {
 
 // Handle the Lambda function event
 module.exports.handler = async (event, context, callback) => {
-  const handler = await app.start();
+  const handler = await awsLambdaReceiver.start();
   return handler(event, context, callback);
 }
diff --git a/src/App.ts b/src/App.ts
index b5d98931c..cb60409fc 100644
--- a/src/App.ts
+++ b/src/App.ts
@@ -433,6 +433,7 @@ export default class App {
   public start(
     ...args: Parameters<HTTPReceiver['start'] | SocketModeReceiver['start']>
   ): ReturnType<HTTPReceiver['start']> {
+    // TODO: HTTPReceiver['start'] should be the actual receiver's return type
     return this.receiver.start(...args) as ReturnType<HTTPReceiver['start']>;
   }
 
diff --git a/src/receivers/AwsLambdaReceiver.spec.ts b/src/receivers/AwsLambdaReceiver.spec.ts
index 76b5ffbf2..87c790ee7 100644
--- a/src/receivers/AwsLambdaReceiver.spec.ts
+++ b/src/receivers/AwsLambdaReceiver.spec.ts
@@ -8,6 +8,7 @@ import AwsLambdaReceiver from './AwsLambdaReceiver';
 import crypto from 'crypto';
 import rewiremock from 'rewiremock';
 import { WebClientOptions } from '@slack/web-api';
+import { AwsHandler } from './AwsLambdaReceiver';
 
 describe('AwsLambdaReceiver', function () {
   beforeEach(function () {});
@@ -48,7 +49,7 @@ describe('AwsLambdaReceiver', function () {
       const awsReceiver = new AwsLambdaReceiver({
         signingSecret: 'my-secret',
       });
-      const handler = await awsReceiver.start();
+      const handler: AwsHandler = await awsReceiver.start();
       assert.isNotNull(handler);
     });