discord-interactions

discord-interactions

Types and helper functions that may come in handy when you implement a Discord webhook.

Overview

This library provides a simple interface for working with Discord webhooks, including both slash command interactions and webhook events. You can build applications that:

• Handle Interactions when users send commands to your app
• Process Webhook Events to receive real-time notifications about activities in your Discord server

When users interact with your application or when events occur in your Discord server, Discord will send HTTP requests to your web application. This library makes it easier to:

• Verify that requests to your endpoint are actually coming from Discord (for both interactions and events)
• Integrate verification with web frameworks that use connect middleware (like express)
• Use lightweight enums and TypeScript types to aid in handling request payloads and responses
• Process different types of webhook payloads with type-safe interfaces

To learn more about building on Discord, see https://discord.dev.

Installation

npm install discord-interactions

Interactions Usage

Use the InteractionType and InteractionResponseType enums to figure out how to respond to an interactions' webhook.

Use verifyKey to check a request signature:

 const signature = req.get('X-Signature-Ed25519');
 const timestamp = req.get('X-Signature-Timestamp');
 const isValidRequest = await verifyKey(req.rawBody, signature, timestamp, 'MY_CLIENT_PUBLIC_KEY');
 if (!isValidRequest) {
   return res.status(401).end('Bad request signature');
 }

Note that req.rawBody must be populated by a middleware (it is also set by some cloud function providers).

If you're using an express-like API, you can simplify things by using the verifyKeyMiddleware. For example:

app.post('/interactions', verifyKeyMiddleware('MY_CLIENT_PUBLIC_KEY'), (req, res) => {
  const message = req.body;
  if (message.type === InteractionType.APPLICATION_COMMAND) {
    res.send({
      type: InteractionResponseType.CHANNEL_MESSAGE_WITH_SOURCE,
      data: {
        content: 'Hello world',
      },
    });
  }
});

Make sure that you do not use other middlewares like body-parser, which tamper with the request body, for interaction routes.

Interaction Types

The following enumerations are available to help working with interaction requests and responses. For more details, see the examples.

InteractionType	An enum of interaction types that can be POSTed to your webhook endpoint.
InteractionResponseType	An enum of response types you may provide in reply to Discord's webhook.
InteractionResponseFlags	An enum of flags you can set on your response data.

Message Components

This library contains lightweight TypeScript types and enums that are helpful when working with Message Components.

MessageComponentTypes	An enum of message component types that can be used in messages and modals.
ActionRow	Type for Action Rows
Button	Type for Buttons
ButtonStyleTypes	Enum for Button Styles
StringSelect	Type for String Selects
StringSelectOption	Type for String Select Options
UserSelect	Type for User Selects
RoleSelect	Type for Role Selects
MentionableSelect	Type for Mentionable Selects
ChannelSelect	Type for Channel Selects
InputText	Type for Text Inputs
TextStyleTypes	Enum for Text Style Types
Section	Type for Sections
TextDisplay	Type for Text Displays
Thumbnail	Type for Thumbnails
MediaGallery	Type for Media Galleries
MediaGalleryItem	Type for Media Gallery Item
FileComponent	Type for File Components
Separator	Type for Separators
Container	Type for Containers
UnfurledMediaItem	Type for Unfurled Media Item

The following enumerations are available to help working with Webhook events. For more details, see the examples.

Webhook Event Usage

Use the WebhookType and WebhookEventType enums to figure out how to process an event webhook.

Use verifyKey to check a request signature (same as above):

 const signature = req.get('X-Signature-Ed25519');
 const timestamp = req.get('X-Signature-Timestamp');
 const isValidRequest = await verifyKey(req.rawBody, signature, timestamp, 'MY_CLIENT_PUBLIC_KEY');
 if (!isValidRequest) {
   return res.status(401).end('Bad request signature');
 }

Note that req.rawBody must be populated by a middleware (it is also set by some cloud function providers).

If you're using an express-like API, you can simplify things by using the verifyWebhookEventMiddleware. For example:

app.post(
	'/events',
	verifyWebhookEventMiddleware(process.env.CLIENT_PUBLIC_KEY),
	(req, res) => {
		console.log("📨 Event Received!")
        console.log(req.body);
	},
);

Webhook Event Types

The following enumerations are available to help working with interaction requests and responses. For more details, see the express example.

WebhookType	An enum of interaction types that can be POSTed to your webhook endpoint.
WebhookEventType	An enum of response types you may provide in reply to Discord's webhook.

For a complete list of available TypeScript types, check out discord-api-types package.

Running the Examples

To run the examples:

npm run build 
export CLIENT_PUBLIC_KEY=${Your Discord App Public Key} 
node examples/express_app.js # or choose a different example

Learning more

To learn more about the Discord API, visit https://discord.dev.