Create Your First Discord Bot with Lambda

Let's set up a TypeScript package that uses the AWS CDK to deploy a Lambda function for handling Discord bot slash commands. Below is a step-by-step guide on how to structure your package and the necessary scripts.

Step by Step Guide

1. Pre-requisites

• AWS
• NodeJS
• Discord

2. Initialize your CDK project

mkdir discord-bot
cd discord-bot
cdk init app --language=typescript

3. Install necessary dependencies

npm install @types/aws-lambda dotenv discord.js discord-interactions 
npm install -D typescript jest @types/jest @types/aws-lambda ts-jest esbuild

4. Add the following options to tsconfig.json

{
  "compilerOptions": {
    ...
    "esModuleInterop": true,
    "skipLibCheck": true,
    "forceConsistentCasingInFileNames": true,
    "outDir": "dist"
  },
}

5. Create .env file with following parameters copied

DISCORD_TOKEN=<YOUR_DISCORD_TOKEN>
DISCORD_CLIENT_ID=<DISCORD_CLIENT_ID>
DISCORD_PUBLIC_KEY=<DISCORD_PUBLIC_KEY>

6. update npm commands in package.json

"scripts": {
    "clean": "rm -rf dist && rm -rf cdk.out",
    "build": "tsc",
    "watch": "tsc -w",
    "test": "jest",
    "register": "node dist/src/commands/register-commands.js",
    "deploy": "npm run clean && npm run build && npm run register && cdk deploy"
  },

7. Copy the files under lib and src

// Copy the entire folder

8. Run the commands

npm run deploy

9. Copy the CloudFormation output printed to INTERACTIONS ENDPOINT URL section and save.

10. Refresh the discord and Tadah!!