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Key Insight
EIP-7702 allows an EOA (standard MetaMask wallet) to point to a smart contract implementation for a single transaction, enabling batch transactions, gas sponsorship, and other ERC-4337 features without permanent migration. Impact: 500M+ existing Ethereum EOA wallets can access account abstraction features without migration friction. Wallet developers should support EIP-7702 delegation for existing users. The distinction between 'regular wallet' and 'smart wallet' becomes less meaningful.
EIP-7702: EOA Delegation
What it does: EIP-7702 allows an externally-owned account (EOA — standard MetaMask wallet) to point to a smart contract implementation for a single transaction. The EOA can temporarily 'become' a smart contract wallet, execute batch transactions, sponsor gas, and other ERC-4337-like features — without permanently migrating to a new account.
Why it matters for wallet developers: Users do not need to migrate from their existing EOA wallet to a new smart contract wallet to access account abstraction features. The 500M+ existing Ethereum EOA wallets can access AA features without migration friction.
Developer Implications
Smart contract wallets (ERC-4337) and EOAs will increasingly converge in feature set
Wallet applications should support EIP-7702 delegation for existing users
The distinction between 'regular wallet' and 'smart wallet' becomes less meaningful
Implementation Consideration
For wallet developers: support EIP-7702 in addition to ERC-4337. For dApp developers: both wallet types will increasingly support the same features (batch transactions, sponsored gas, session keys) — design for the features, not the wallet type.