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Account Abstraction

Effortlessly create and manage smart accounts for your users with just a few lines of code, using our Smart Account feature. Additionally, smart accounts offer enhanced control and programmability, enabling features like those listed below.

  • Gas Abstraction: Cover transaction fees for users, or allow users to pay for their own transactions using ERC-20 tokens.
  • Batch Transactions: Perform multiple transactions in a single call.
  • Automated Transactions: Allow users to automate actions, like swapping ETH to USDT when ETH hits $4,000.
  • Set Spending Limits: Allow users to set tailored spending limits.

Our smart account integration streamlines your setup, allowing you to create and manage smart accounts using your favorite libraries like Viem, Ethers, and Wagmi. With this, you don't need to rely on third party packages to effortlessly create ERC-4337 compatible Smart Contract Wallets (SCWs), and give users the ability to perform batch transactions and efficiently manage gas sponsorship.

Web3Auth's smart account feature gives you the flexibility to configure your bundler client, and and integrate your paymaster. For more insights into how ERC-4337 works and its components, check out our detailed blog post.

note

This is a paid feature and the minimum pricing plan to use this SDK in a production environment is the Growth Plan. You can use this feature in Web3Auth Sapphire Devnet network for free.

Installation​

To use native account abstraction, you'll need to install the @web3auth/account-abstraction-provider, which allows you to create and interact with Smart Contract Wallets (SCWs). This provider simplifies the entire process by managing the complex logic behind configuring the account abstraction provider, bundler, and preparing user operations.

npm install --save @web3auth/account-abstraction-provider

Configure​

When instantiating the Account Abstraction Provider, you can pass configuration objects to the constructor. These configuration options allow you to select the desired Account Abstraction (AA) provider, as well as configure the bundler and paymaster, giving you flexibility and control over the provider.

import {
  AccountAbstractionProvider,
  SafeSmartAccount,
} from "@web3auth/account-abstraction-provider";

const chainConfig = {
  chainNamespace: CHAIN_NAMESPACES.EIP155,
  chainId: "0xaa36a7",
  rpcTarget: "https://rpc.sepolia.org",
  displayName: "Ethereum Sepolia Testnet",
  blockExplorerUrl: "https://sepolia.etherscan.io",
  ticker: "ETH",
  tickerName: "Ethereum",
  logo: "https://cryptologos.cc/logos/ethereum-eth-logo.png",
};

const accountAbstractionProvider = new AccountAbstractionProvider({
  config: {
    chainConfig,
    smartAccountInit: new SafeSmartAccount(),
    bundlerConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/11155111/rpc?apikey=${pimlicoAPIKey}`,
    },
  },
});

Please note this is the important step for setting the Web3Auth account abstraction provider.

Configure Smart Account Provider​

Web3Auth offers the flexibility to choose your preferred Account Abstraction (AA) provider. Currently, we support Safe, Kernel, Biconomy, and Trust.

import {
  AccountAbstractionProvider,
  SafeSmartAccount,
} from "@web3auth/account-abstraction-provider";

const chainConfig = {
  chainNamespace: CHAIN_NAMESPACES.EIP155,
  chainId: "0xaa36a7",
  rpcTarget: "https://rpc.sepolia.org",
  displayName: "Ethereum Sepolia Testnet",
  blockExplorerUrl: "https://sepolia.etherscan.io",
  ticker: "ETH",
  tickerName: "Ethereum",
  logo: "https://cryptologos.cc/logos/ethereum-eth-logo.png",
};

const accountAbstractionProvider = new AccountAbstractionProvider({
  config: {
    chainConfig,
    smartAccountInit: new SafeSmartAccount(),
    bundlerConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/11155111/rpc?apikey=${pimlicoAPIKey}`,
    },
  },
});

Configure Bundler​

Web3Auth enables you to configure your bundler and define the paymaster context. The bundler aggregates the UserOperations and submits them on-chain via a global entry point contract.

Bundler support is not limited to the examples below—you can use any bundler of your choice.

import {
  AccountAbstractionProvider,
  SafeSmartAccount,
} from "@web3auth/account-abstraction-provider";

const chainConfig = {
  chainNamespace: CHAIN_NAMESPACES.EIP155,
  chainId: "0xaa36a7",
  rpcTarget: "https://rpc.sepolia.org",
  displayName: "Ethereum Sepolia Testnet",
  blockExplorerUrl: "https://sepolia.etherscan.io",
  ticker: "ETH",
  tickerName: "Ethereum",
  logo: "https://cryptologos.cc/logos/ethereum-eth-logo.png",
};

const accountAbstractionProvider = new AccountAbstractionProvider({
  config: {
    chainConfig,
    smartAccountInit: new SafeSmartAccount(),
    bundlerConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/${chainId}/rpc?apikey=${pimlicoAPIKey}`,
    },
  },
});

Configure Paymaster​

You can configure the paymaster of your choice to sponsor gas fees for your users, along with the paymaster context. The paymaster context lets you set additional parameters, such as choosing the token for ERC-20 paymasters, defining gas policies, and more.

import {
  AccountAbstractionProvider,
  SafeSmartAccount,
} from "@web3auth/account-abstraction-provider";

const chainConfig = {
  chainNamespace: CHAIN_NAMESPACES.EIP155,
  chainId: "0xaa36a7",
  rpcTarget: "https://rpc.sepolia.org",
  displayName: "Ethereum Sepolia Testnet",
  blockExplorerUrl: "https://sepolia.etherscan.io",
  ticker: "ETH",
  tickerName: "Ethereum",
  logo: "https://cryptologos.cc/logos/ethereum-eth-logo.png",
};

const accountAbstractionProvider = new AccountAbstractionProvider({
  config: {
    chainConfig,
    smartAccountInit: new SafeSmartAccount(),
    bundlerConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/${chainId}/rpc?apikey=${pimlicoAPIKey}`,
    },
    paymasterConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/${chainId}/rpc?apikey=${pimlicoAPIKey}`,
    },
  },
});

ERC-20 Paymaster​

When using an ERC-20 paymaster, ensure you include the approval transaction, as Web3Auth does not handle the approval internally.

For Pimlico, you can specify the token you want to use in the paymasterContext. If you want to set up sponsorship policies, you can define those in the paymasterContext as well. Checkout the supported tokens for ERC-20 Paymaster on Pimlico.

import {
  AccountAbstractionProvider,
  SafeSmartAccount,
} from "@web3auth/account-abstraction-provider";

const chainConfig = {
  chainNamespace: CHAIN_NAMESPACES.EIP155,
  chainId: "0xaa36a7",
  rpcTarget: "https://rpc.sepolia.org",
  displayName: "Ethereum Sepolia Testnet",
  blockExplorerUrl: "https://sepolia.etherscan.io",
  ticker: "ETH",
  tickerName: "Ethereum",
  logo: "https://cryptologos.cc/logos/ethereum-eth-logo.png",
};

const accountAbstractionProvider = new AccountAbstractionProvider({
  config: {
    chainConfig,
    bundlerConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/${chainId}/rpc?apikey=${pimlicoAPIKey}`,
      paymasterContext: {
        token: "SUPPORTED_TOKEN_CONTRACT_ADDRESS",
      },
    },
    smartAccountInit: new SafeSmartAccount(),
    paymasterConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/${chainId}/rpc?apikey=${pimlicoAPIKey}`,
    },
  },
});

Set up​

Configure Web3Auth Instance​

import { EthereumPrivateKeyProvider } from "@web3auth/ethereum-provider";
import {
  AccountAbstractionProvider,
  SafeSmartAccount,
} from "@web3auth/account-abstraction-provider";
import Web3Auth, { WEB3AUTH_NETWORK } from "@web3auth/react-native-sdk";
import * as WebBrowser from "@toruslabs/react-native-web-browser";
import EncryptedStorage from "react-native-encrypted-storage";
import { CHAIN_NAMESPACES } from "@web3auth/base";

const chainConfig = {
  chainNamespace: CHAIN_NAMESPACES.EIP155,
  chainId: "0xaa36a7",
  rpcTarget: "https://rpc.sepolia.org",
  displayName: "Ethereum Sepolia Testnet",
  blockExplorerUrl: "https://sepolia.etherscan.io",
  ticker: "ETH",
  tickerName: "Ethereum",
  logo: "https://cryptologos.cc/logos/ethereum-eth-logo.png",
};

const accountAbstractionProvider = new AccountAbstractionProvider({
  config: {
    chainConfig,
    bundlerConfig: {
      // Get the pimlico API Key from dashboard.pimlico.io
      url: `https://api.pimlico.io/v2/11155111/rpc?apikey=${pimlicoAPIKey}`,
    },
    smartAccountInit: new SafeSmartAccount(),
  },
});

const privateKeyProvider = new EthereumPrivateKeyProvider({
  config: { chainConfig },
});

const web3auth = new Web3Auth(WebBrowser, EncryptedStorage, {
  clientId,
  redirectUrl,
  network: WEB3AUTH_NETWORK.SAPPHIRE_MAINNET, // or other networks
  privateKeyProvider,
  accountAbstractionProvider: aaProvider,
});

Configure Signer​

The Web3Auth Smart Account feature is compatible with popular signer SDKs, including wagmi, ethers, and viem. You can choose your preferred package to configure the signer.

You can retreive the provider to configure the signer from Web3Auth instance.

Wagmi

Wagmi does not require any special configuration to use the signer with smart accounts. Once you have set up your Web3Auth provider and connected your wallet, Wagmi's hooks (such as useSigner or useAccount) will automatically use the smart account as the signer. You can interact with smart accounts using Wagmi just like you would with a regular EOA (Externally Owned Account) signer—no additional setup is needed.

import { createWalletClient } from "viem";

// Use your Web3Auth instance to retreive the provider.
const provider = web3auth.provider;

const walletClient = createWalletClient({
  transport: custom(provider),
});

Smart Account Address​

Once the signers or Wagmi configuration is set up, it can be used to retrieve the user's Smart Account address.

// Use walletClient instance from previous step
const addresses = await walletClient.getAddresses();

const smartAccountAddress = addresses[0];
const eoaAddress = addresses[1];

Send Transaction​

Developers can use their preferred signer or Wagmi hooks to initiate on-chain transactions, while Web3Auth manages the creation and submission of the UserOperation. Only the to, data, and value fields need to be provided. Any additional parameters will be ignored and automatically overridden.

To ensure reliable execution, the bundler client sets maxFeePerGas and maxPriorityFeePerGas values. If custom values are required, developers can use the Viem's BundlerClient to manually construct and send the user operation.

Since Smart Accounts are deployed smart contracts, the user's first transaction also triggers the on-chain deployment of their wallet.

// Convert 1 ether to WEI format
const amount = parseEther("1");

// Submits a user operation to the blockchain
const hash = await walletClient.sendTransaction({
  to: "DESTINATION_ADDRESS",
  value: amount,
  // This will perform the transfer of ETH
  data: "0x",
});

// Wait for the transaction to be mined
const receipt = await publicClient.waitForTransactionReceipt({ hash });

Advanced Smart Account Operations​

To learn more about supported transaction methods, and how to perform batch transactions, checkout our detailed documentation of AccountAbstractionProvider.