Convex Database Adapter for Better-Auth

This is a database adapter for Convex that allows you to use BetterAuth with Convex.

Installation

npm install convex-database-adapter

Usage

Initiate the Convex Database Adapter

Head over to your Better Auth server instance, and under database, add the convexAdapter function.

import { betterAuth } from "better-auth";
import { convexAdapter } from "convex-better-auth";

export const auth = betterAuth({
  database: convexAdapter({
    convex_url: process.env.CONVEX_URL,
  }),
  plugins: [],
  //... other options
});

Create the Convex Handler

This allows our adapter to communicate with your Convex DB.

Create a new file in convex/betterAuth.ts and add the following code:

NOTE: It's important that the file name is exactly betterAuth.ts and that it is in the convex directory.

import { action, internalQuery } from "./_generated/server";
import { internal } from "./_generated/api";
import { ConvexHandler, ConvexReturnType } from "./../src/convex_action";

const { betterAuth, query } = ConvexHandler({
  action,
  internalQuery,
  internal,
}) as ConvexReturnType;

export { betterAuth, query };