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# Signature.toBytes

:::info
`Signature.toBytes` is a re-export of ox's [`Signature.toBytes`](https://oxlib.sh/api/Signature/toBytes). Refer to the ox documentation for the full reference.
:::

Serializes a [`Signature.Signature`](/docs/utilities/signature/types#signature) to [`Bytes.Bytes`](/docs/utilities/bytes/types#bytes).

## Imports

```ts
import { Signature } from 'viem/utils'
```

## Examples

```ts twoslash
// @noErrors
import { Signature } from 'viem/utils'

const signature = Signature.toBytes({
  r: '0x6e100a352ec6ad1b70802290e18aeed190704973570f3b8ed42cb9808e2ea6bf',
  s: '0x4a90a229a244495b41890987806fcbd2d5d23fc0dbe5f5256c2613c039d76db8',
  yParity: 1
})
// @log: Uint8Array [102, 16, 10, ...]
```

## Definition

```ts
function toBytes(
  signature: Signature<boolean>,
): Bytes.Bytes
```

## Parameters

### signature

* **Type:** `Signature<boolean>`

The signature to serialize.

#### signature.r

* **Type:** `0x${string}`

#### signature.s

* **Type:** `0x${string}`

#### signature.yParity

* **Type:** `numberType`
* **Optional**

## Return Type

The serialized signature.

`Bytes.Bytes`