textbee

mirror of https://github.com/vernu/textbee.git synced 2026-06-17 04:00:08 -04:00

Files

isra el 164124d616 feat(billing): update existing Polar subscription on plan change instead of creating a new checkout

A paid subscriber upgrading (pro -> scale) or downgrading (scale -> pro)
previously got a brand-new Polar checkout, ending up with two live Polar
subscriptions and double billing. Now an active paid subscription is
updated in place via Polar's subscription update API.

- store polarSubscriptionId/polarCustomerId/cancelAtPeriodEnd on
  subscriptions (recovered via externalCustomerId for legacy records)
- POST /billing/checkout returns a planChange preview for paid users;
  new POST /billing/change-plan executes it (uncancels a scheduled
  cancellation first, org-default proration, idempotent with webhooks)
- allow monthly<->yearly interval switches; keep ALREADY_ON_PLAN only
  for same plan + same interval; block custom plans (CONTACT_BILLING)
- map Polar 402/403/409 errors to actionable messages; run plan-change
  detection before cached checkout-session reuse
- checkout page shows a confirmation screen before applying the change;
  account page shows a success toast

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-06-12 20:09:00 +03:00