# NATS — zappier-account-balance

Queue group `account-balance`. This process is the source of truth for prepaid cents.

| Direction | Address | Kind | Body |
|-----------|---------|------|------|
| IN | `verae.billing.statement.get` | request-reply | `{ customerId }` → statement |
| IN | `verae.billing.balance.get` | request-reply | `{ customerId }` → statement |
| IN | `verae.billing.balance.adjust` | request-reply | `{ customerId, cents, reason, agent, kind }` |
| IN | `verae.billing.usage.recorded` | pub | `{ customerId, endpointId, cents, at }` (debits prepaid) |

`payment.recorded` and `credit.applied` are fan-out events from publishers; prepaid mutations go through `balance.adjust`.