Use of Buffer causing runtime errors

[BenSampo]

The Buffer.from method is used in utils to decode the token. Buffer isn't available outside of node environments (e.g. within the browser) and is causing runtime errors (ReferenceError: Buffer is not defined).

auth-sdk/src/utils.ts

Line 19 in 6dd0cb3

const decodedTokenData = Buffer.from(tokenParts[1] || "", "base64").toString();

For reference, I'm using the obtainAccessToken on the SaleorExternalAuth class which is in turn calling this util method. I'm trying to implement an external OIDC flow using Apollo - which isn't in the docs and have been loosely following this:
https://github.com/saleor/auth-sdk?tab=readme-ov-file#nextjs-pages-router-with-openid-connect

[Shaokun-X]

I had the same issue, my current workaround is polyfilling the Buffer class as described in this issue vitejs/vite#2785:

$ npm i buffer

// in the entry file of your app

// fix the buffer bug in @saleor/auth-sdk
import { Buffer } from 'buffer';
globalThis.Buffer = Buffer;

For bundlers other than vite the workaround should be similar