> ## Documentation Index
> Fetch the complete documentation index at: https://voltaire.tevm.sh/llms.txt
> Use this file to discover all available pages before exploring further.

# BrandedRlp Type

> RLP data structure type definition and usage

<Card title="Try it Live" icon="play" href="https://playground.tevm.sh?example=primitives/rlp.ts">
  Run RLP examples in the interactive playground
</Card>

# BrandedRlp Type

`BrandedRlp` is the underlying branded type for RLP data structures used throughout Tevm's RLP module.

## Type Definition

```typescript theme={null}
export type BrandedRlp =
  | { type: "bytes"; value: Uint8Array }
  | { type: "list"; value: BrandedRlp[] };
```

Union type representing either:

* **BytesData:** Leaf node containing raw bytes
* **ListData:** Nested array of RLP data

## Usage

Use through the `Rlp` class or imported functions:

```typescript theme={null}
import { Rlp } from 'tevm'

// Create RLP data
const bytes = Rlp(new Uint8Array([1, 2, 3]))
const list = Rlp([new Uint8Array([1]), new Uint8Array([2])])

// Check type
const isBytes = bytes.type === 'bytes'
const isList = list.type === 'list'
```

## See Also

* [Encoding](/primitives/rlp/encoding) - Encode RLP structures
* [Decoding](/primitives/rlp/decoding) - Decode RLP bytes
* [Branded Types](/getting-started/branded-types) - Type branding pattern