Account Abstraction for smart contract wallets

AmbireAccount.sol @4cce586

Ambire supports ERC-4337 smart contract wallets

blog.ambire.com

Ambire is AA wallet by default. With the introduction of EIP-7702 it allows you to use your existing EOA just like you would use any smart account wallet!

developers.uniswap.org

Uniswap smart wallet uses the Calibur implementation with EIP-7702 delegation across supported networks.

x.com

Rainbow announced EIP-7702 smart wallets that delegate EOAs to bundle approvals and actions into a single transaction.

willDelegate.ts @a6caacc

Both clients execute EIP-7702 (type-4) delegation as part of swap/send-calls flows via the @rainbow-me/delegation SDK. The willExecuteDelegation function decides per (address, chainId) whether the next operation delegates.

AddKeySlotButton.tsx @01e1872

Key rotation changes are supported in the UI and result in onchain transactions with a well-known structure

pillarx.app

PillarX supports EIP-7702

NuFi support site

The NuFi FAQ mentions the use the MetaMask Delegator contract as smart account implementation.

etherscan.io

OKX Wallet upgrades the EOA via an EIP-7702 authorization delegating to its delegator contract.

docs.base.org

Base Accounts are ERC-4337 Smart Wallets created via passkey onboarding. The user is sole owner by default (passkey held in device secure enclave). Coinbase does not hold a co-owner key per Terms of Service. The underlying contract supports multi-owner via addOwner/removeOwnerAtIndex, but the mobile app does not expose passkey or owner management UI. Account Management shows only "Sign out". Optional recovery-key setup lives in keys.coinbase.com rather than the mobile app.

blog.base.dev

Legacy Base App EOA users can be upgraded to smart-wallet behavior via EIP-7702 delegation to the EIP7702Proxy (an ERC-1967 proxy whose implementation can be set to the Coinbase Smart Wallet). The delegation is sponsored by Coinbase on Base mainnet and is performed transparently as part of app interactions. There is no user-facing "upgrade my account" UI in the Base App.

Base App team statement (2026-02-23)

Per Base App team statement, supported account types are "EOA + 7702 delegation / 4337".

Elytro-eth/soul-wallet-contract

Elytro supports ERC-4337 smart contract wallets