# `zappier-account-balance/persist`

**Package:** `zappier-account-balance`  
**Source:** `packages/zappier-account-balance/src/persist.js`  
**Lines:** 29

## What this module is

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

## Exports

`booksPath`, `loadInto`, `saveFrom`

## Types / interfaces / classes

_None extracted._

## Functions

| Name | Parameters | Param types (JSDoc) | Returns | Calls (same file / helpers) |
|------|------------|---------------------|---------|-----------------------------|
| `booksPath` | `(none)` | — | `unknown` | see Call graph |
| `loadInto` | `books` | — | `unknown` | see Call graph |
| `saveFrom` | `books` | — | `unknown` | see Call graph |

## Methods (class / object)

| Name | Parameters |
|------|------------|
| `return` | `process.env.BOOKS_PATH ||
    path.join(process.env.FLEET_STATE_DIR || process.cwd(` |

## What it imports / requires

- `node:fs`
- `node:path`

## Call graph (identifiers invoked)

`booksPath`, `join`, `cwd`, `loadInto`, `existsSync`, `load`, `parse`, `readFileSync`, `saveFrom`, `mkdirSync`, `dirname`, `writeFileSync`, `stringify`, `dump`, `renameSync`

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`.