Account Abstraction

Under the traditional Ethereum model, every account is either an externally owned account (EOA), controlled solely by a private key, or a smart contract, which has no key at all. Account abstraction blurs that line by letting a wallet behave like programmable software rather than a fixed set of rules, so the logic for authorizing a transaction can be customized instead of being hardcoded into the protocol.

The main implementation is ERC-4337, live on Ethereum since 2023, which works entirely outside consensus rules. Users sign "UserOperations" instead of standard transactions; these are collected by bundlers and relayed through a singleton EntryPoint contract, which validates and executes them. A separate contract called a paymaster can cover gas on the user's behalf, so someone can swap tokens or mint an NFT without holding ETH first. Ethereum's 2025 Pectra upgrade added EIP-7702, which lets an ordinary EOA temporarily delegate to smart contract code in a single transaction, giving existing wallets many account abstraction features without migrating to a brand-new address.

Together these standards enable social recovery (replacing a lost key through trusted guardians), session keys for game or app logins, spending limits, and batching multiple actions into one confirmation. Adoption has scaled quickly across major rollups and consumer wallets, though risks remain: buggy account contracts can lock funds, and paymasters must guard against being drained by spam operations.