---
id: "ledger"
type: "kind"
category: "data"
url: "https://localhost:3000/catalogue/kinds/ledger"
---

# Ledger

Append-only double-entry money store.

| | |
|---|---|
| Category | Data |
| Properties | 7 |
| Components | 11 |
| Rules | 0 |

## Properties

| property | type | values | required | default |
|---|---|---|---|---|
| `appendOnly` | boolean | — | no | true |
| `doubleEntry` | boolean | — | no | true |
| `indexConsistency` (advanced) | enum | `strong`, `eventual` | no | "strong" |
| `managed` | boolean | — | no | false |
| `sealed` (advanced) | boolean | — | no | false |
| `tamperEvident` | boolean | — | no | false |
| `tiering` (advanced) | boolean | — | no | false |

## Rules for this kind · 0

No rule selects this kind or its category.

## Components · 11

### vendor-neutral

- [Generic ledger](https://localhost:3000/catalogue/components/ledger.md) `ledger` — the kind itself

### alibabacloud

- [Blockchain as a Service](https://localhost:3000/catalogue/components/alibaba-blockchain-as-a-service.md) `alibaba-blockchain-as-a-service` — 4 defaults

### aws

- [Amazon Managed Blockchain network](https://localhost:3000/catalogue/components/aws-managed-blockchain.md) `aws-managed-blockchain` — 5 defaults
- [Amazon QLDB](https://localhost:3000/catalogue/components/qldb.md) `qldb` — 6 defaults

### azure

- [Azure confidential ledger](https://localhost:3000/catalogue/components/azure-confidential-ledger.md) `azure-confidential-ledger` — 6 defaults

### default

- [Double-entry ledger](https://localhost:3000/catalogue/components/double-entry-ledger.md) `double-entry-ledger` — 5 defaults
- [Formance Ledger](https://localhost:3000/catalogue/components/formance.md) `formance` — 4 defaults
- [Hyperledger Fabric](https://localhost:3000/catalogue/components/hyperledger-fabric.md) `hyperledger-fabric` — 6 defaults
- [TigerBeetle](https://localhost:3000/catalogue/components/tigerbeetle.md) `tigerbeetle` — 5 defaults

### gcp

- [Blockchain Node Engine](https://localhost:3000/catalogue/components/google-blockchain-node-engine.md) `google-blockchain-node-engine` — 4 defaults

### oci

- [Oracle Blockchain Platform](https://localhost:3000/catalogue/components/oci-blockchain-platform.md) `oci-blockchain-platform` — 4 defaults

## Source (`kind` YAML, verbatim)

```yaml
# yaml-language-server: $schema=../schema/kind.schema.json
# Abstract kind: Append-only double-entry money store (Stripe Ledger, Uber LedgerStore). Distinct from sql-database because rules test its invariants.
schemaVersion: "1"
type: "kind"
id: "ledger"
category: "data"
properties:
  doubleEntry:
    type: "boolean"
    default: true
  appendOnly:
    type: "boolean"
    default: true
  tamperEvident:
    type: "boolean"
    default: false
  sealed:
    type: "boolean"
    default: false
    advanced: true
  indexConsistency:
    type: "enum"
    values: ["strong", "eventual"]
    default: "strong"
    advanced: true
  tiering:
    type: "boolean"
    default: false
    advanced: true
  managed:
    type: "boolean"
    default: false
```

Human page: https://localhost:3000/catalogue/kinds/ledger