created_at2022-10-06 16:15:03.303705
updated_at2023-09-13 18:32:52.50002
descriptionAn opinionated formatting and linting tool for foundry projects
Matt Solomon (mds1)




A simple and opinionated tool designed for basic formatting/linting of Solidity and TOML code in foundry projects.


When using the ScopeLift Foundry template scopelint will automatically be ran in CI. To run locally:

  1. Install the rust toolchain
  2. Run cargo install scopelint


Once installed there are three commands:

  • scopelint fmt
  • scopelint check
  • scopelint spec

For all commands, please open issues for any bug reports, suggestions, or feature requests.

scopelint fmt

This command will format:

  • Solidity files using the configuration specified in foundry.toml.
  • TOML files using a hardcoded configuration that indents keys and sorts them alphabetically to improve readability.

scopelint check

This command ensures that development best practices are consistently followed by validating that:

  • Test names follow a convention of ^test(Fork)?(Fuzz)?(_Revert(If|When|On))?_(\w+)*$. (To see a list of example valid test names, see here).
  • Constants and immutables are in ALL_CAPS.
  • Function names and visibility in forge scripts only have 1 public run method per script.
  • Internal or private functions in the src/ directory start with a leading underscore.

More checks are planned for the future.

Scopelint is opinionated in that it does not currently let you configure these checks or turn any off. However, if there is demand for this it may be added in a future version.

scopelint spec

Most developers don't have formal specifications they are building towards, and instead only have a general idea of what they want their contracts to do. As a result, documentation and tests are the closest things many protocols have to a specification (unless they go through the formal verification process). And because documentation is often not written until the end of the development process, it is often incomplete or inaccurate, and therefore tests are typically the closest thing to a specification.

scopelint spec embraces this philosophy of "your tests are your spec" to help developers come up with a spec with minimal effort—structure your tests contracts and test names and described in the Best Practices guide, and scopelint spec will generate a specification for you! This specification can be shared with other stakeholders to make sure everyone is on the same page about what the contract should do.

Below is a simple example for an ERC-20 token, the full example repo can be found here.


Currently this feature is in beta, and we are looking for feedback on how to improve it. Right now it's focused on specifications for unit tests, which are very useful for developers but less useful for higher-level stakeholders. As a result, it does not yet include information about protocol invariants or integration test / user-story types of specifications. If you have any thoughts or ideas, please open an issue here.

Commit count: 57

cargo fmt