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Implementing Particle’s Modular AA Stack within Web Applications

Although Wallet-as-a-Service extends the flexibility of EOAs, Particle Network recently decided to focus on account abstraction as the primary means of interaction within applications, facilitated by Wallet-as-a-Service. Thus, Particle has recently released its modular AA stack, a collection of technologies and SDKs natively compatible with Wallet-as-a-Service. This release happened alongside any other wallet that exposes an EIP-1193 provider, or any application leveraged account abstraction through alternative means.

Specifically, this stack includes:

• The Particle Bundler: Particle Network’s in-house, open-source Bundler, responsible for almost 1 million UserOperations.
• Particle’s Omnichain Paymaster: Facilitates multi-chain USDT-based gas sponsorships from a single deposit.
• Particle’s AA SDKs: These streamline the implementation of AA natively with Particle’s Wallet-as-a-Service.

Within this page, you’ll find a quick rundown on installing, configuring, and using Particle’s AA SDK (tying in directly with its Bundler and Paymaster). For information on Particle Network’s Modular Smart Wallet-as-a-Service, take a look at Modular Smart Wallet-as-a-Service, or if you’d like to dive into the technical details a bit more, head over to Introduction to Smart Wallet-as-a-Service.

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Installing and configuring the AA SDK

Particle currently categorizes its various AA SDKs by platform. Thus, for desktop, everything is unified into a single SDK, @particle-network/aa.

As mentioned, the Particle AA SDK can be installed through commands such as:

npm install @particle-network/aa

Or

yarn add @particle-network/aa

Upon installation, you can immediately configure a smart account to use, derived from (owned by) a wallet connected to a provided EIP-1193 provider object. Within this configuration, you’ll have the ability to choose between either a Biconomy (BICONOMY), CyberConnect (CYBERCONNECT), or SimpleAccount (SIMPLE) instance. In this same configuration, you’ll be able to define the usage of either Particle Network’s native Paymaster (will be active if paymasterApiKeys is left blank), or Biconomy’s paymaster (only active if paymasterApiKeys is defined). An example of this configuration is below:

import { SmartAccount } from '@particle-network/aa';
  
const smartAccount = new SmartAccount(provider, {
    projectId: 'Particle Network project ID',
    clientKey: 'Particle Network client key',
    appId: 'Particle Network app ID',
    aaOptions: {
        accountContracts: {  // 'BICONOMY', 'CYBERCONNECT', 'SIMPLE'
            BICONOMY: [
                {
                    version: '1.0.0',  
                    chainIds: [x, xx],
                },
                {  
                    version: '2.0.0',
                    chainIds: [x, xx],
                }
            ],
            CYBERCONNECT: [
                {
                    version: '1.0.0',
                    chainIds: [x, xx], 
                }
            ],
            SIMPLE: [
                {
                    version: '1.0.0',
                    chainIds: [x, xx],
                }
            ],
        },
        paymasterApiKeys: [{
            chainId: 1,  
            apiKey: 'Biconomy Paymaster API Key',
        }]
    }, 
});

smartAccount.setSmartAccountContract({ name: 'BICONOMY', version: '2.0.0' });

From this point, you can either directly construct, sponsor, and send UserOperations (alongside the initialization of session keys and whatnot if you’d like) through the newly initialized smartAccount object, or through a traditional Web3 library such as ethers or Web3.js; the latter is done through the construction of an 1193 provider object, AAWrapProvider.

import { AAWrapProvider, SendTransactionMode } from '@particle-network/aa';
import Web3 from "web3";

// .UserPaidNative, .Gasless, or .UserSelect
const wrapProvider = new AAWrapProvider(smartAccount, SendTransactionMode.UserPaidNative); 
const web3 = new Web3(wrapProvider); 

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Master reference

For a complete reference of each method available on smartAccount, see the table below, or for more usage information, take a look at the AA Web SDK rundown at AA Web SDK.