ModuleKit

A development kit for building smart account modules

ModuleKit aims to make it simple for any developer to build a module that works across all ERC-7579 compliant accounts, including Safe, ZeroDev’s Kernel V3, Biconomy’s Nexus, and many more.

ModuleKit has several tools to help during the development lifecycle of a module:

Build

• Standardized interfaces and templates: These ensure that your module is compatible with all the major account implementations and that it's extremely easy to get started.
• Third-party integrations: ModuleKit has a library of integrations and pre-built conditions for execution to make building powerful modules seamless.

Test

• Testing frameworks: These are out-of-the-box testing setups with in-built unit and integration tests. They allow developers to easily test modules against different account implementations and abstract away the complexities of the entire ERC-4337 flow.
• Helper utilities: These utilities improve the developer experience, such as calculating gas consumption (including on L2s) and validating that a module conforms to the ERC-4337 rules.

Deploy

• Deployment script: The ModuleKit comes with a helper contract that allows you to easily deploy a module and register it in the Module Registry.

Supported Accounts

ERC-7579SafeKernel (v3)Biconomy (v3)

Supported Module Types

Validators

Determine whether a transaction is valid and should be executed

Executors

Create executions on the account with custom logic

Hooks

Enforce conditions or execute logic pre- or post-execution

Fallbacks

Extend the account logic to add more functionality into the account

Useful starting resources

• Blog: Introducing ModuleKit (opens in a new tab)
• Blog: ModuleKit deep dive (opens in a new tab)
• Modulekit-examples repo (opens in a new tab)
• List of open-source modules and resources: awesome-modular-accounts repo (opens in a new tab)
• Learn more about modules
• To use existing modules, check out the Module SDK