Clarinet

Clarinet is the fastest way to build, test, and deploy smart contracts on the Stacks blockchain. It gives you a local devnet, REPL, testing framework, and debugging tools to ship high-quality Clarity code with confidence.

• 🧑‍💻 Leverage a powerful CLI
  Create new projects, manage your smart contracts and their dependencies using clarinet requirements, and interact with your code through the built-in REPL.

• 🧪 Write unit tests with the SDK
  Use the Clarinet SDK to write unit tests in a familiar JS environment and validate contract behavior.

• 🛠️ Run a private blockchain environment
  Spin up a local devnet with nodes, miners, and APIs so you can test and integrate your code.

• 🔍 VSCode extension: Linter, step by step debugger, helps writing smart contracts (autocompletion, documentation etc)

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Documentation

• Clarinet CLI
• Clarinet JS SDK and testing framework

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Quickstart

# Install Clarinet
brew install clarinet

To check out more installation methods, click here

# Create a new project
clarinet new hello-world
cd hello-world

# Create a new contract
clarinet contract new counter

;; Add this to the `contracts/counter.clar`

(define-map counters principal uint)

(define-public (count-up)
  (ok (map-set counters tx-sender (+ (get-count tx-sender) u1)))
)

(define-read-only (get-count (who principal))
  (default-to u0 (map-get? counters who))
)

# Then test it out

# Check the contract
clarinet check

# Launch the REPL
clarinet console

# Inside the console
(contract-call? .counter count-up)
(contract-call? .counter get-count tx-sender)

Contributing

Contributions are welcome and appreciated. The following sections provide information on how you can contribute to Clarinet.

Prerequisites

Before contributing to Clarinet, please ensure you meet the following requirements:

• rust (>=1.52.0)
• cargo (>=1.52.0)
• node (>=v14.16.0) - Used for git commit hook
• npm (>=7.18.0) - Used for git commit hook

Guide

This repo follows the Conventional Commit specification when writing commit messages.

NoteIt is important that any pull requests you submit have commit messages that follow this standard.

To start contributing:

1. Fork this repo and clone the fork locally.
2. Create a new branch

   git checkout -b <my-branch>

3. Run npm i in the local repo to install and initialize husky and commitlint.

   npm i

4. These tools will be used in a git commit hook to lint and validate your commit message. If the message is invalid, commitlint will alert you to try again and fix it.

Here is an example of a bad message response:

git commit -m "bad message"
⧗   input: bad message
✖   subject may not be empty [subject-empty]
✖   type may not be empty [type-empty]

✖   found 2 problems, 0 warnings
ⓘ   Get help: https://github.com/conventional-changelog/commitlint/#what-is-commitlint

husky - commit-msg hook exited with code 1 (error)

Here is an example of a good message response:

git commit -m "fix: added missing dependency"
[my-branch 4c028af] fix: added missing dependency
1 file changed, 50 insertions(+)

5. After making your changes, ensure the following:
   • cargo build runs successfully.
   • cargo tst runs successfully.
     • cargo tst is an alias declared in ./cargo/config, it runs cargo-nextest
   • You have formatted your code with cargo fmt --all --
   • All functional tests in the examples directory pass.

     for testdir in $(ls examples); do
         pushd examples/${testdir}
             ../../target/debug/clarinet check .
         popd
     done

6. Submit a pull request against the develop branch for review.

Code of Conduct

Please read our Code of conduct since we expect project participants to adhere to it.

Community

Join our community and stay connected with the latest updates and discussions:

• Join our Discord community chat to engage with other users, ask questions, and participate in discussions.
• Visit hiro.so for updates and subscribing to the mailing list.
• Follow Hiro on X.