Variable: REFERRAL_COOKIE_MAX_AGE

const REFERRAL_COOKIE_MAX_AGE: number

Default cookie lifetime: 30 days.

This is the "landing → signup" window only. It is intentionally NOT tied to the shop's referral validity setting (days the referred customer has to place their first order) — that window starts at signup and is validated exclusively by the backend. Coupling the two would be wrong: a shop giving referred customers 7 days to order would silently lose visitors who sign up 8 days after clicking the link. Override per call via captureReferralCode({ maxAge }) if you need a different capture window.