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Adapters: viem & ethers

The SDK is designed to work with the tools you already know and love.
It’s not a standalone library — it’s an extension that plugs directly into your existing viem or ethers.js setup.
This design means you can keep your existing provider, signer, and connection logic. The SDK simply layers ZKsync-specific actions on top.

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Why an Adapter Model?

  • Bring Your Own Stack: Integrates directly with viem (PublicClient, WalletClient) or ethers providers and signers.
  • Familiar Developer Experience: Keep your existing connection and signing flow unchanged.
  • Lightweight & Focused: Only adds ZKsync-specific functionality like deposits, withdrawals, and soon interop — nothing more.

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Installation

# For viem users
npm install @dutterbutter/zksync-sdk viem

# For ethers.js users
npm install @dutterbutter/zksync-sdk ethers

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How to Use

The SDK extends your existing client. Configure viem or ethers normally, then wrap them with the SDK’s adapter factory. 
import { createPublicClient, http, createWalletClient, parseEther } from "viem";
import { createViemSdk, createViemClient } from "@dutterbutter/zksync-sdk/viem";
import { ETH_ADDRESS } from '@dutterbutter/zksync-sdk/core';

const l1 = createPublicClient({ transport: http(L1_RPC) });
const l2 = createPublicClient({ transport: http(L2_RPC) });

const l1Wallet: WalletClient<Transport, Chain, Account> = createWalletClient({
account,
transport: http(L1_RPC),
});

const client = createViemClient({ l1, l2, l1Wallet });
const sdk = createViemSdk(client);

const me = account.address as Address;
const params = {
amount: parseEther('0.01'),
token: ETH_ADDRESS,
to: me,
// optional:
// l2GasLimit: 300_000n,
// gasPerPubdata: 800n,
// operatorTip: 0n,
// refundRecipient: me,
} as const;

const handle = await sdk.deposits.create({ params });
await sdk.deposits.wait(handle, { for: 'l1' }); // L1 included
await sdk.deposits.wait(handle, { for: 'l2' }); // L2 executed

console.log('Deposit complete ✅');

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Key Principles

  • No Key Management: The SDK never asks for or stores private keys — signing stays with your WalletClient or Signer.
  • API Parity: Both adapters expose the same API. Calling sdk.deposits.quote() works identically with viem or ethers.
  • Easy Migration: Switch between ethers and viem by only changing the initialization code.