> ## 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.

# Bundler

> An ERC-4337 participant that collects UserOperations and submits them to the EntryPoint contract.

# Bundler

An ERC-4337 participant that collects UserOperations and submits them to the EntryPoint contract.

## Definition

An ERC-4337 participant that collects UserOperations and submits them to the EntryPoint contract.

## Why it matters

Wallet concepts are central to user custody, authentication, recovery, and blockchain interaction.

## Related knowledge

* [Account Abstraction](/generated/v2/glossary/account-abstraction) — term
* [Seed Phrase](/generated/v2/glossary/seed-phrase) — term
* [Wallet](/generated/v2/glossary/wallet) — term

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**Canonical knowledge ID:** `glossary:bundler`