# `zappier/credits`

**Package:** `zappier`  
**Source:** `packages/zappier/src/credits.ts`  
**Lines:** 30

## What this module is

Implementation module in `zappier`. The tables below are extracted from the source (signatures + JSDoc).

## Exports

`CreditAdjustment`, `CreditLedger`

## Types / interfaces / classes

| Kind | Name |
|------|------|
| interface | `CreditAdjustment` |
| class | `CreditLedger` |

## Functions

_No top-level functions extracted._

## Methods (class / object)

| Name | Parameters |
|------|------------|
| `add` | `row: Omit<CreditAdjustment, 'id' | 'at'> & { id?: string; at?: string }` |
| `list` | `customerId?: string` |

## What it imports / requires

_No imports detected._

## Call graph (identifiers invoked)

`add`, `now`, `toString`, `toISOString`, `unshift`, `list`, `filter`

Each identifier is a call site in this file. Follow the import list to see the defining module; open that module’s MD for parameter and return types.

## Return values (how to read this)

- HTTP route handlers return Express `res.json(...)` bodies (see route docs).
- Zapier `perform` functions return a **single object** (creates) or an **array** (triggers/searches).
- Pricing functions return integer **cents** on `Quote.totalCents`.