Discord OAuth2 Elysia Plugin

A simple and flexible Elysia plugin for implementing Discord OAuth2 authentication with customizable routes and database integration.

Features

• Simple Discord OAuth2 implementation
• Customizable route prefixes
• Easy database integration via callbacks
• TypeScript support with full type definitions
• Zero dependencies (only peer dependency on Elysia)

Installation

npm install discord-oauth-elysia-plugin # npm
yarn add discord-oauth-elysia-plugin # yarn
pnpm add discord-oauth-elysia-plugin # pnpm
bun add discord-oauth-elysia-plugin # bun

Usage

Basic Example

import { Elysia } from "elysia";
import { discordOAuth } from "discord-oauth-elysia-plugin";

const app = new Elysia()
  .use(
    discordOAuth({
      clientId: process.env.DISCORD_CLIENT_ID!,
      clientSecret: process.env.DISCORD_CLIENT_SECRET!,
      redirectUri: "http://localhost:8080/auth/discord/callback",
    })
  )
  .listen(8080);

Custom Route Prefix

import { discordOAuth } from "discord-oauth-elysia-plugin";

const app = new Elysia().use(
  discordOAuth({
    clientId: process.env.DISCORD_CLIENT_ID!,
    clientSecret: process.env.DISCORD_CLIENT_SECRET!,
    redirectUri: "http://localhost:8080/oauth/discord/callback",
    routePrefix: "/oauth/discord", // Custom route prefix
  })
);

With MongoDB Integration (using official driver)

import { Elysia } from "elysia";
import { MongoClient } from "mongodb";
import { discordOAuth } from "discord-oauth-elysia-plugin";

const client = new MongoClient(process.env.MONGODB_URI!);
const db = client.db("my-app");
const users = db.collection("users");

const app = new Elysia().use(
  discordOAuth({
    clientId: process.env.DISCORD_CLIENT_ID!,
    clientSecret: process.env.DISCORD_CLIENT_SECRET!,
    redirectUri: "http://localhost:8080/auth/discord/callback",
    routePrefix: "/auth/discord",
    onUserAuthenticated: async (user, tokens) => {
      await users.updateOne(
        { discordId: user.id },
        {
          $set: {
            discordId: user.id,
            username: user.username,
            globalName: user.globalName,
            avatar: user.avatar,
            email: user.email,
            verified: user.verified,
          },
        },
        { upsert: true }
      );
    },
  })
);

Custom Scopes

const app = new Elysia().use(
  discordOAuth({
    clientId: process.env.DISCORD_CLIENT_ID!,
    clientSecret: process.env.DISCORD_CLIENT_SECRET!,
    redirectUri: "http://localhost:8080/auth/discord/callback",
    scopes: ["identify", "email", "guilds"], // Custom scopes
  })
);

Configuration Options

Option	Type	Required	Default	Description
clientId	string	Yes	-	Your Discord application client ID
clientSecret	string	Yes	-	Your Discord application client secret
redirectUri	string	Yes	-	The redirect URI configured in your Discord application
routePrefix	string	No	"/auth/discord"	The route prefix for OAuth routes
scopes	string[]	No	["identify"]	Discord OAuth2 scopes to request
onUserAuthenticated	function	No	-	Callback function called after successful authentication
response	function	No	returns { user, access_token, ... }	Customize the JSON returned from the callback route; receives user, rawUser, and token details

Routes

The plugin creates two routes:

1. Authorization Route: {routePrefix} (default: /auth/discord)

   • Redirects users to Discord's OAuth2 authorization page

2. Callback Route: {routePrefix}/callback (default: /auth/discord/callback)

   • Handles the OAuth2 callback from Discord
   • Returns user information and access token

Response Format

By default, the callback route returns a JSON response with the following structure:

{
  "user": {
    "id": "123456789012345678",
    "username": "username",
    "globalName": "Display Name",
    "avatar": "avatar_hash",
    "discriminator": "0000",
    "email": "user@example.com",
    "verified": true,
    "locale": "en-US"
  },
  "access_token": "token_here",
  "token_type": "Bearer",
  "expires_in": 604800
}

You can override this completely using the response option:

const app = new Elysia().use(
  discordOAuth({
    clientId: process.env.DISCORD_CLIENT_ID!,
    clientSecret: process.env.DISCORD_CLIENT_SECRET!,
    redirectUri: "http://localhost:8080/auth/discord/callback",
    response: ({ user, rawUser, tokens }) => ({
      id: user.id,
      username: user.username,
      accessToken: tokens.access_token,
      // add whatever else you need here
    }),
  })
);

TypeScript Types

The plugin exports the following types:

• DiscordOAuthConfig - Configuration type for the plugin
• DiscordUser - User object type
• DiscordTokenResponse - Token response type
• DiscordUserResponse - Raw Discord API user response type

License

MIT