# Ledger

> Double-entry accounts in a currency or a custom unit, balanced transactions, balances and holds. Credits, stock, leave balances and invoice payments post through it.

- Category: Billing & commerce
- Module: `ledger`
- Modes: `managed`, `custom`
- Docs: https://bettersupabase.com/docs/blocks/ledger
- Page: https://bettersupabase.com/blocks/ledger

## Install

```bash
npx better-supabase add ledger
```

The command also installs `updated-at`, `tenant`, `access`.

## Configure

Add the block to `better-supabase.config.ts`:

```ts
import { defineConfig } from "better-supabase/config";

export default defineConfig({
  blocks: {
    // Required by ledger; add installs them too.
    "updated-at": {},
    tenant: {},
    access: {},
    // Modes: "managed", "custom". The default is "managed".
    ledger: { mode: "managed" },
  },
});
```

## Client

The block has no React entry yet. Its server-side TypeScript is in `better-supabase/blocks/ledger`.

## Events

- `ledger_account.closed`
- `ledger_account.opened`
- `ledger_hold.captured`
- `ledger_hold.placed`
- `ledger_hold.released`
- `ledger_transaction.posted`
- `ledger_transaction.reversed`

## Related blocks

Requires: [tenant](https://bettersupabase.com/blocks/tenant.md), [access](https://bettersupabase.com/blocks/access.md)

Works with: [outbox](https://bettersupabase.com/blocks/outbox.md), [audit](https://bettersupabase.com/blocks/audit.md)