permissionless.js

permissionless.js is a TypeScript library built on top of viem for deploying and managing ERC-4337 smart accounts, interacting with bundlers and paymasters, and leveraging custom signers.

Features

• High-Level Smart Account Support: We support a high-level API for deploying and managing smart accounts, including some of the most popular implementations (Safe, Kernel, Biconomy, etc.)
• Bundler Support: We support all bundler actions following ERC-4337.
• Gas Sponsorship: We support paymaster actions to allow you to easily sponsor gas fees.
• User Operation Utility Functions: We provide many low-level utility functions useful for dealing with User Operations.
• Modular and Extensible: We allow you to easily create and plug in your own smart account systems, bundlers, paymasters, and signers.
• Built on & for viem: permissionless.js is designed to be a thin wrapper around viem, maintaining the same style and overall feel viem provides.
• and a lot more...

Documentation

Take a look at our documentation to learn more about permissionless.js.

Installation

Install viem as a peer dependency.

Then install permissionless.js:

npm install viem permissionless

bun install viem permissionless

yarn add viem permissionless

Optional Dependencies

For WebAuthn functionality (passkeys), you'll also need to install the ox package:

npm install ox

bun install ox

yarn add ox

Note: The ox package is optional and only required if you plan to use WebAuthn/passkey features. The library will throw a helpful error message if you try to use WebAuthn functionality without installing ox.

Quick Start

// Import the required modules.
import { createSmartAccountClient } from "permissionless";
import { createPaymasterClient } from "viem/account-abstraction";
import { sepolia } from "viem/chains";
import { http } from "viem";

const paymaster = createPaymasterClient({
  transport: http(`https://api.pimlico.io/v2/sepolia/rpc?apikey=${pimlicoApiKey}`)
})

const account = toSimpleSmartAccount<entryPointVersion>({
  client: getPublicClient(anvilRpc),
  owner: privateKeyToAccount(generatePrivateKey())
})

// Create the required clients.
const bundlerClient = createSmartAccountClient({
  account,
  paymaster, 
  chain: sepolia,
  bundlerTransport: http(
    `https://api.pimlico.io/v2/sepolia/rpc?apikey=${pimlicoApiKey}`,
  ), // Use any bundler url
});

// Consume bundler, paymaster, and smart account actions!
const userOperationReceipt = await bundlerClient.getUserOperationReceipt({
  hash: "0x5faea6a3af76292c2b23468bbea96ef63fb31360848be195748437f0a79106c8",
});

Contributors

For a full explanation of permissionless.js, please visit our docs page

Build permissionless.js locally with:

bun run build

License

Distributed under an MIT License. See LICENSE for more information.

Contact

Feel free to ask any questions in our Telegram group