Docs

Elysia Integration

This integration guide is assuming you are using Elysia with bun server.

Before you start, make sure you have a Better Auth instance configured. If you haven't done that yet, check out the installation.

Mount the handler

We need to mount the handler to Elysia endpoint.

import { Elysia } from "elysia";
import { auth } from "./auth";
 
const betterAuthView = (context: Context) => {
  const BETTER_AUTH_ACCEPT_METHODS = ["POST", "GET"]
  // validate request method
  if(BETTER_AUTH_ACCEPT_METHODS.includes(context.request.method)) {
    return auth.handler(context.request);
  }
  else {
    context.error(405)
  }
}
 
const app = new Elysia().all("/api/auth/*", betterAuthView).listen(3000);
 
console.log(
  `🦊 Elysia is running at ${app.server?.hostname}:${app.server?.port}`
);

Middleware

You can use derive to provide session and user information before pass to view.

import { Elysia } from "elysia";
import { auth } from "./auth";
 
// user middleware (compute user and session and pass to routes)
const userMiddleware = async (request: Request) => {
  const session = await auth.api.getSession({ headers: request.headers });
 
  if (!session) {
    return {
      user: null,
      session: null
    }
  }
 
  return {
    user: session.user,
    session: session.session
  }
}
 
// user info view
// type User can be export from `typeof auth.$Infer.Session.user`
// type Session can be export from `typeof auth.$Infer.Session.session`
const userInfo = (user: User | null, session: Session | null) => {
  return {
    user: user,
    session: session
  }
}
 
const app = new Elysia()
  .derive(({ request }) => userMiddleware(request))
  // about betterAuthView code, please check `Mount the handler` topic 
  .all("/api/auth/*", betterAuthView)
  // Example custom endpoint
  .get("/user", ({ user, session }) => userInfo(user, session))
  .listen(3000);
 
console.log(
  `🦊 Elysia is running at ${app.server?.hostname}:${app.server?.port}`
);

This will allow you to access the user and session object in all of your routes.

Node Integration

Integrate Better Auth with Node.

Nitro Integration

Integrate Better Auth with Nitro.

Edit on GitHub

On this page