DLB

This is a simple Discord leaderboard bot leveraging AWS free-tier services.

To get started:

Pre-reqs:

• AWS account for setting up Lambda
• Discord Developer Portal
• Node.js

1. Setup of AWS Lambda:

• Create a Lambda function
• Runtime set to Node.js
• Architecture set to x86_64
• Open Advanced Settings and check Enable function URL
  • Auth type: NONE
  • check Configure cross-origin resource sharing (CORS)
  • leave the rest default

2. Setup of Nodejs:

NOTE:
Discord security verification requires tweetnacl.

• On local machine, create a new directory i.e. lambda_files to store node_modules as well as .js files for Lambda
  • run npm i tweetnacl @aws-sdk/client-dynamodb
• Setup your index.js and any other files
• Zip within the folder, including node_modules, and upload to Lambda function

3. Setup of Discord Application:

NOTE:
Assign permissions based on the needs of your function; DO NOT grant Administrator.

• Create a new Application on the Discord Developer Portal
• In the Application's settings, navigate to the "OAuth2" section, and generate the URL with the following Scopes:
  • application.commands
  • bot
• Bot Permissions
  • use slash commands
• Copy the Public Key from the Discord Application and set it as an Environment Variable named "PUBLIC_KEY" in the Lambda configuration
• Copy the function URL from Lambda and use it as the Discord Interactions Endpoint URL

4. Registering Commands:

NOTE:
To register commands we use axios to query and post to Discord API.
Secrets are stored in .env which uses dotenv.
Leaderboard is stored using DynamoDB.

• On local machine, create a new directory separate from lambda_files
  • run npm i axios dotenv @aws-sdk/client-dynamodb
• update the .env file with your BOT TOKEN, APP ID, and GUILD ID
• run node register.js script

TIP:
Global commands could take up to 1 hour to create, delete or modify. If you need to update a command quickly for testing you can create it as a guild command.

Addt. Resources:

• https://docs.aws.amazon.com/sdk-for-javascript/v3/developer-guide/welcome.html#welcome_whats_new_v3
• https://discord.com/developers/docs/interactions/application-commands#slash-commands