# Coinbase Smart Wallet

The `toCoinbaseSmartAccount` implementation references the [Coinbase Smart Wallet](https://github.com/coinbase/smart-wallet) contract.

## Usage

:::code-group
```ts twoslash [example.ts]
import { toCoinbaseSmartAccount } from 'viem/account-abstraction' // [!code focus]
import { client } from './client.js'
import { owner } from './owner.js'

const account = await toCoinbaseSmartAccount({ // [!code focus]
  client, // [!code focus]
  owners: [owner], // [!code focus]
  version: '1.1', // [!code focus]
}) // [!code focus]
```

```ts twoslash [client.ts] filename="config.ts"
import { http, createPublicClient } from 'viem'
import { mainnet } from 'viem/chains'
 
export const client = createPublicClient({
  chain: mainnet,
  transport: http(),
})
```

```ts twoslash [owner.ts (Private Key)] filename="owner.ts"
import { privateKeyToAccount } from 'viem/accounts'
 
export const owner = privateKeyToAccount('0x...')
```

```ts twoslash [owner.ts (Passkey)] filename="owner.ts"
import { createWebAuthnCredential, toWebAuthnAccount } from 'viem/account-abstraction'

// Register a credential (ie. passkey).
const credential = await createWebAuthnCredential({ name: 'Wallet' })
 
// Create a WebAuthn owner account from the credential.
export const owner = toWebAuthnAccount({ credential })
```
:::

:::tip
**Tip:** You can use a Passkey (WebAuthn) to sign User Operations. Check the **owner.ts (Passkey)** tab.
:::

## Returns

`SmartAccount<CoinbaseSmartAccountImplementation>`

## Parameters

### client

* **Type:** `Client`

Client used to retrieve Smart Account data.

```ts
const client = createPublicClient({ // [!code focus]
  chain: mainnet, // [!code focus]
  transport: http(), // [!code focus]
}) // [!code focus]

const account = await toCoinbaseSmartAccount({
  client, // [!code focus]
  owners: [owner],
  version: '1.1',
})
```

### owners

* **Type:** `(LocalAccount | WebAuthnAccount)[]`

Owners of the Smart Account. Can be a [Local Account](/docs/accounts/local) or a [WebAuthn Account (Passkey)](/account-abstraction/accounts/webauthn).

```ts
const account = await toCoinbaseSmartAccount({
  client,
  owners: [privateKeyToAccount('0x...')], // [!code focus]
})
```

### ownerIndex (optional)

* **Type:** `number`

Index of the owner to use for signing messages & User Operations.

```ts
const account = await toCoinbaseSmartAccount({
  client,
  owners: [privateKeyToAccount('0x...'), privateKeyToAccount('0x...')],
  ownerIndex: 1, // [!code focus]
  version: '1.1',
})
```

### nonce (optional)

* **Type:** `bigint`

Nonce to use for the Smart Account.

```ts
const account = await toCoinbaseSmartAccount({
  client,
  owners: [owner],
  nonce: 1n, // [!code focus]
  version: '1.1',
})
```

### version

* **Type:** `'1.1' | '1'`
* **Default:** `'1'`

Version of the Smart Account to use.

:::warning
Version bumps DO contain breaking changes.
:::

```ts
const account = await toCoinbaseSmartAccount({
  client,
  owners: [owner],
  version: '1', // [!code focus]
})
```