AA3 Wallet

World's first Account Abstraction wallet on Fantom

Comment 48

Inspiration

On 1-Mar-2023, Ethereum Foundation announced the launch of account abstraction on Ethereum at WalletCon 2023. They deployed a feature known as “account abstraction”, the new standard ERC-4337 standard.

That was the beginning Era of Smart Accounts, I think.

What it does

AA3 Wallet is the first-ever Chrome extension wallet for account abstraction feature support Fantom Network, built on top of @aa3/smart-contract-sdk - an infrastructure to simplify Account Abstraction development.

Features

  • Self-custodial wallet, the private key is constructed by Torus decentralized network.
  • Seamless onboarding experience for users by login with social like Google, Facebook...
  • Create wallets at addresses that can be deterministically calculated.
  • Send a batch of transactions.
  • Integrate with multiple swap platforms: Uniswap, SushiSwap, SpookySwap, SpiritSwap.
  • Light/Dark mode.

How we built it

  • The Chrome extension is built with SvelteJS, picocss, and @aa3/smart-contract-sdk
  • Entry Point, Paymaster contracts follows the official ERC-4337 contracts developed by eth-infinitism/account-abstraction
  • Singer account - behind wallet smart account contract - is controlled by Web3Auth - self-custodial Wallet-as-a-service infrastructure.
  • Utilizing Web3 data service Covalent to get historical balances, and prices and interact with DEXs/AMMs
  • Using AWS EC2 to deploy Bundler replayer server which was developed by etherspot/skandha and Covalent proxy server.

Challenges we ran into

  • Almost bundlers are required debug_traceCall RPC API to simulate operations, Fantom nodes are run with go-opera which does not support debug_traceCall.
  • Covalent is not compatible with Chrome extension, I have to build a simple proxy to serve data.

What we learned

  • Deeply understanding of account abstraction concept, especially smart account ERC-4337.
  • Learned Svelte a lot - an open-source frontend javascript framework -simple, less code, build super fast.

What's next for AA3 Wallet

  • Improve UI/EX
  • Support more EVM-based chains
  • Gasless / Sponsored transactions
  • Gas Fee Token Flexibility
  • FIAT On/Off-ramping
  • Social Recovery
  • Session keys for games

Built With

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