EIP-7702 Overview

Why EIP-7702

EIP-7702 is an upcoming upgrade to Ethereum and EVM blockchains which enables wallets to convert the user EOA wallets into Smart Accounts

With EIP-7702, wallets can drastically improve the UX for their users by offering smart account features, such as:

Gas Abstraction
The ability to pay for gas with ERC20 tokens

Gas Sponsorship
Wallets can sponsor user gas onchain and offer their users a different way of paying for their transactions (e.g. prepaid, postpaid, ...)

Batch Execution
The ability to batch execute transactions with a single signature

Enable Automation
Wallets can install (or enable apps to install) Session Keys on accounts, which provide a safe way to automate wallet actions. Session keys provide guardrails, meaning that the Session Key signer can only execute the exact transactions approved by the wallet/user. This can include enabling dollar cost averaging, TWAP selling, yield rebalancing, ...

The Most Comprehensive EIP-7702 Solutions Suite

At Biconomy, we have built the most comprehensive EIP-7702 solution on the market, enabling wallets to add all of the above mentioned features, as well as many advanced - Biconomy stack specific features:

Unified User Balances
Wallets can present apps with a Unified Multichain Balance. The app can then "pull" the funds they need to the chain of their choosing. Wallets can work with solvers and bridges to provide this liquidity.

Cross-Chain Gas Abstraction
Wallets can enable users to pay for gas with native or ERC20 tokens across chains. E.g. a user can pay for a transaction on Base with USDC or ETH on Arbitrum.

Native Scheduling and Automation
The Biconomy MEE Nodes can commit to execute a transaction at some point in the future or to execute a series of transactions in some time period. For Biconomy integrators, this is available without installing a separate module.

Quickstart Guide for Developers

npm install @biconomy/abstractjs viem @rhinestone/module-sdk@0.2.7

// This is the address of the EOA to which 
// address we'll be "installing" the smart account to.
const eoa = privateKeyToAccount('0xPrivateKey')
 
// Create an instance of a viem wallet client and extend it with the 
// required EIP-7702 actions.
const walletClient = createWalletClient({
  chain: odysseyTestnet,
  account: eoa,
  transport: http(),
}).extend(EIP-7702Actions())
 
const authorization = await walletClient.signAuthorization({
  // Address of the Nexus Proxy Singleton
  contractAddress: nexusProxyAddress 
})