Preserving booking flow state across Supabase email auth redirect (Next.js)
here’s a cleaned-up question you can drop into the Supabase Discord:
I’m building a booking app (Next.js 14 + Supabase). Users can complete the booking steps as guests, but on the final step they must authenticate. I trigger email OTP and redirect back to my app after the user clicks the link.
Current flow
1. User completes steps 1–3 (guest).
2. At step 4 (payment), I call
signInWithOtp and pass an emailRedirectTo URL that brings them back to /auth/callback.
3. The session is created, but my app sends them back to the main homepage. Not the booking step with state
What I want
After the email link flow, the user should land back on the booking flow with all prior steps preserved and be taken straight to the payment page.
Question
What’s the recommended way to persist and restore pre-auth state across the Supabase email link redirect?
* Should I encode a state/next param in emailRedirectTo and restore from that?
* Is there a built-in “state” mechanism for email OTP similar to OAuth, or should I roll my own?
* Best practice to link an anonymous/guest booking to the newly authenticated user (e.g., stash a bookingId + secure token server-side and attach it post-auth)?
* Any examples using Supabase Auth Helpers for Next.js to keep session continuity and avoid restarting the flow?
Appreciate any patterns or example repos that show resuming a multi-step flow after magic-link auth.0 Replies