Rhinestone SDK

End-to-end chain abstraction and modularity toolkit

Usage

Installation

npm install viem @rhinestone/sdk

pnpm install viem @rhinestone/sdk

yarn add viem @rhinestone/sdk

bun install viem @rhinestone/sdk

Quickstart

You'll need a Rhinestone API key, as well as an existing account with some testnet ETH on the source chain.

Creating a Wallet

Let's create a smart account with a single owner:

import { createRhinestoneAccount } from '@rhinestone/sdk'
import { generatePrivateKey, privateKeyToAccount } from 'viem/accounts'
import { baseSepolia, arbitrumSepolia, optimismSepolia } from 'viem/chains'
import {
  Chain,
  createPublicClient,
  createWalletClient,
  encodeFunctionData,
  erc20Abi,
  Hex,
  http,
  parseEther,
} from 'viem'

const fundingPrivateKey = process.env.FUNDING_PRIVATE_KEY
if (!fundingPrivateKey) {
  throw new Error('FUNDING_PRIVATE_KEY is not set')
}

const rhinestoneApiKey = process.env.RHINESTONE_API_KEY
if (!rhinestoneApiKey) {
  throw new Error('RHINESTONE_API_KEY is not set')
}

const sourceChain = baseSepolia
const targetChain = arbitrumSepolia

// You can use an existing PK here
const privateKey = generatePrivateKey()
console.log(`Owner private key: ${privateKey}`)
const account = privateKeyToAccount(privateKey)

const rhinestoneAccount = await createRhinestoneAccount({
  owners: {
    type: 'ecdsa',
    accounts: [account],
  }
  rhinestoneApiKey,
})
const address = await rhinestoneAccount.getAddress()
console.log(`Smart account address: ${address}`)

Funding the Account

We will send some ETH from the funding account to the created smart account. The Orchestrator will use some of that ETH to deploy the account on the target chain, as well as to convert it to USDC for a transfer transaction.

const publicClient = createPublicClient({
  chain: sourceChain,
  transport: http(),
});
const fundingAccount = privateKeyToAccount(fundingPrivateKey as Hex);
const fundingClient = createWalletClient({
  account: fundingAccount,
  chain: sourceChain,
  transport: http(),
});

const txHash = await fundingClient.sendTransaction({
  to: address,
  value: parseEther('0.001'),
});
await publicClient.waitForTransactionReceipt({ hash: txHash });

Sending a Cross-chain Transaction

Finally, let's make a cross-chain token transfer:

const usdcTarget = '0x75faf114eafb1BDbe2F0316DF893fd58CE46AA4d';
const usdcAmount = 1n;

const transaction = await rhinestoneAccount.sendTransaction({
  sourceChain,
  targetChain,
  calls: [
    {
      to: usdcTarget,
      value: 0n,
      data: encodeFunctionData({
        abi: erc20Abi,
        functionName: 'transfer',
        args: ['0xd8da6bf26964af9d7eed9e03e53415d37aa96045', usdcAmount],
      }),
    },
  ],
  tokenRequests: [
    {
      address: usdcTarget,
      amount: usdcAmount,
    },
  ],
});
console.log('Transaction', transaction);

const transactionResult = await rhinestoneAccount.waitForExecution(transaction);
console.log('Result', transactionResult);

After running that, you will get a smart account deployed on both Base Sepolia and Arbitrum Sepolia, and make a cross-chain USDC transfer.

Using Smart Sessions

First, define a session you want to use:

const session: Session = {
  owners: {
    type: 'ecdsa',
    accounts: [sessionOwner],
  },
  actions: [
    {
      target: wethAddress,
      selector: toFunctionSelector(
        getAbiItem({
          abi: wethAbi,
          name: 'deposit',
        }),
      ),
    },
    {
      target: wethAddress,
      selector: toFunctionSelector(
        getAbiItem({
          abi: wethAbi,
          name: 'transfer',
        }),
      ),
      policies: [
        {
          type: 'universal-action',
          rules: [
            {
              condition: 'equal',
              calldataOffset: 0n,
              referenceValue: '0xd8da6bf26964af9d7eed9e03e53415d37aa96045',
            },
          ],
        },
      ],
    },
  ],
}

During account initialization, provide the session you've just created. Make sure to also provide a bundler configuration.

const rhinestoneAccount = await createRhinestoneAccount({
  // …
  sessions: [session],
  bundler: {
    // …
  },
})

When making a transaction, specify the signers object to sign it with the session key:

const transactionResult = await rhinestoneAccount.sendTransaction({
  // …
  signers: {
    type: 'session',
    session: session,
  },
})

Contributing

For feature or change requests, feel free to open a PR, start a discussion or get in touch with us.