> ## Documentation Index
> Fetch the complete documentation index at: https://docs.theblockchainlibrary.com/llms.txt
> Use this file to discover all available pages before exploring further.

# ERC-4337

> An Ethereum standard for account abstraction using UserOperations, bundlers, EntryPoint, and optional paymasters.

# ERC-4337

An Ethereum standard for account abstraction using UserOperations, bundlers, EntryPoint, and optional paymasters.

## Definition

An Ethereum standard for account abstraction using UserOperations, bundlers, EntryPoint, and optional paymasters.

## Why it matters

Ethereum-specific terms explain its execution environment, standards, accounts, and scaling roadmap.

## How it works

It introduces a higher-level 'UserOperation' mempool. Instead of a transaction initiated by an EOA, a user sends a 'UserOperation' which is bundled by 'Bundlers' and processed by a specialized smart contract called an 'EntryPoint'. This allows for arbitrary logic like signature validation or fee payment via third parties.

## Real-world example

Safe (formerly Gnosis Safe) and various newer smart wallets utilize account abstraction features.

## Advantages

* Improved user experience
* Enhanced account security
* Supports gasless transactions

## Limitations

* Requires protocol support
* Increased complexity for devs

## Common misconceptions

* Users think they have to give up self-custody to use it, but it remains fully non-custodial.
* People assume it is a layer 2 solution, but it is a standard for the Ethereum account model.

## Related knowledge

* [EIP](/generated/v2/glossary/eip) — term
* [Ethereum](/categories/ethereum) — term
* [Smart Contract](/generated/v2/glossary/smart-contract) — term

***

**Canonical knowledge ID:** `glossary:erc-4337`