⭐️ Introduction

What is ERC-4337?

ERC-4337 enables Account Abstraction (AA) on Ethereum without requiring any changes to the protocol. Instead of modifying Ethereum's base protocol, it introduces a new flow using UserOperation objects, a decentralized alt-mempool, and an on-chain EntryPoint contract.

This architecture unlocks powerful wallet features like:

  • ✅ Custom signature schemes (e.g. passkeys, multisig)

  • ✅ Gasless transactions via Paymasters

  • ✅ One-click flows through batched calls

  • ✅ Modular smart accounts with upgradability and recovery

  • ✅ Wallet creation without EOAs or upfront ETH

Unlike centralized relayer-based solutions, ERC-4337 achieves these benefits while preserving decentralization through a permissionless mempool and bundler ecosystem.

🌐 Why This GitBook?

This GitBook serves as your technical companion to everything ERC-4337 and beyond. It consolidates specs, summaries, and best practices to help you:

  • Build or integrate smart contract wallets

  • Understand the UserOperation lifecycle

  • Leverage Paymasters for better onboarding

  • Explore modularity and emerging standards

  • Stay aligned with Ethereum’s decentralization ethos

Let’s build the future of wallets — programmable, recoverable, and user-friendly — without compromising Ethereum's core values.

📖 Start here: Smart Accounts ➡

🔗 Resources

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