Billing & Subscription Quotas Flow
Understand the core mechanics, queues, and logic routines running on our servers when processing this module.
System Execution Pipeline
Below is the step-by-step sequence of events executed by our background workers.
Select Subscription
The user selects a plan (Single, Basic, Multi, or Unlimited).
Stripe Checkout
The browser redirects to a secure Stripe Checkout page to complete payment.
Webhook Response
Stripe sends a secure webhook payload (`checkout.session.completed`) to our API.
Quota Update
The workspace is upgraded, and limits on domains and emails are updated.
Developer & Architect Notes
Technical Architecture
This module operates as a stateless service hosted across horizontally scalable server nodes. Distributed state coordinates through highly optimized Redis transactions to ensure consistency without deadlocks.
Edge Fail-Safe Rules
Critical protocols (like connection failure retries, cool-down timers, and data limits) are verified before outbound dispatches. Failures degrade gracefully, prioritizing list health and preventing blacklisting.