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# Authorization.toTupleList

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

Converts an [`Authorization.List`](/docs/utilities/authorization/types#list) to an [`Authorization.TupleList`](/docs/utilities/authorization/types#tuplelist).

## Imports

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

## Examples

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

const authorization_1 = Authorization.from({
  address: '0x1234567890abcdef1234567890abcdef12345678',
  chainId: 1,
  nonce: 69n
})
const authorization_2 = Authorization.from({
  address: '0x1234567890abcdef1234567890abcdef12345678',
  chainId: 3,
  nonce: 20n
})

const tuple = Authorization.toTupleList([
  authorization_1,
  authorization_2
]) // [!code focus]
// @log: [
// @log:   [
// @log:     address: '0x1234567890abcdef1234567890abcdef12345678',
// @log:     chainId: 1,
// @log:     nonce: 69n,
// @log:   ],
// @log:   [
// @log:     address: '0x1234567890abcdef1234567890abcdef12345678',
// @log:     chainId: 3,
// @log:     nonce: 20n,
// @log:   ],
// @log: ]
```

## Definition

```ts
function toTupleList<list>(
  list?: list,
): toTupleList.ReturnType<list>
```

## Parameters

### list

* **Type:** `list`
* **Optional**

An [`Authorization.List`](/docs/utilities/authorization/types#list).

## Return Type

An [EIP-7702](https://eips.ethereum.org/EIPS/eip-7702) Authorization tuple list.

`toTupleList.ReturnType<list>`