# Getting Started with ZKsync

:::warning
**Note:** This extension is maintained by ZKsync collaborators.
:::

Viem provides first-class support for the [ZKsync](https://zksync.io) chain.

ZKsync is a Layer-2 protocol that scales Ethereum with cutting-edge ZK tech.

## Quick Start

### 1. Set up your Client & Transport

Firstly, set up your [Client](/docs/clients/intro) with a desired [Transport](/docs/clients/intro) & [ZKsync Chain](./zksync/chains.md) and extend it with ZKsync EIP712 actions.

```ts twoslash
import 'viem/window'
// ---cut---
import { createWalletClient, custom } from 'viem'
import { zksync } from 'viem/chains'
import { eip712WalletActions } from 'viem/zksync'

const walletClient = createWalletClient({ // [!code hl]
  chain: zksync, // [!code hl]
  transport: custom(window.ethereum!), // [!code hl]
}).extend(eip712WalletActions()) // [!code hl]
```

### 2. Use Actions

Now that you have a Client set up, you can [send a transaction](./zksync/actions/sendTransaction.md) on ZKsync using a [paymaster](https://docs.zksync.io/build/developer-reference/account-abstraction.html#paymasters)!

```ts twoslash
import 'viem/window'
import { createWalletClient, custom } from 'viem'
import { zksync } from 'viem/chains'
import { eip712WalletActions } from 'viem/zksync'

const walletClient = createWalletClient({
  chain: zksync,
  transport: custom(window.ethereum!),
}).extend(eip712WalletActions())
// ---cut---
const hash = await walletClient.sendTransaction({
  account: '0xA0Cf798816D4b9b9866b5330EEa46a18382f251e',
  to: '0x70997970c51812dc3a010c7d01b50e0d17dc79c8',
  value: 1000000000000000000n,
  paymaster: '0xFD9aE5ebB0F6656f4b77a0E99dCbc5138d54b0BA',
  paymasterInput: '0x123abc...'
})
```

...and even write to contracts:

```ts twoslash
import 'viem/window'
import { createWalletClient, custom, parseAbi } from 'viem'
import { zksync } from 'viem/chains'
import { eip712WalletActions } from 'viem/zksync'

const walletClient = createWalletClient({
  account: '0x',
  chain: zksync,
  transport: custom(window.ethereum!),
}).extend(eip712WalletActions())
// ---cut---
const hash = await walletClient.writeContract({
  address: '0xFBA3912Ca04dd458c843e2EE08967fC04f3579c2',
  abi: parseAbi(['function mint(uint32 tokenId) nonpayable']),
  functionName: 'mint',
  args: [69420],
})
```