waitlist

What it is

waitlist.

A visitor joins a named waitlist and confirms by email; on confirmation the module assigns a dense queue position inside a single atomic batch, so two people confirming at once never share a place. Referral codes credit a confirmed referrer on the same product. It answers identical bytes for every row state, so the endpoint reveals nothing about who is on the list.

Positions are dense at assign time per product and never recomputed on delete, and the referrer credit and the position update run in one Database::batch — atomic on D1, a transaction on SQLite and Postgres.