@hirosystems/clarinet-sdk

Clarinet SDK

The Clarinet SDK can be used to interact with the simnet from Node.js.

You can use this SDK to:

• call public and read-only functions from smart contracts
• get clarity maps or data-var values
• deploy contracts
• get contract ABI
• write unit tests for Clarity smart contracts

Core

npm install @hirosystems/clarinet-sdk

Usage

import { initSimnet } from "@hirosystems/clarinet-sdk";
import { Cl } from "@stacks/transactions";

async function main() {
  const simnet = await initSimnet();

  const accounts = simnet.getAccounts();
  const w1 = accounts.get("wallet_1")!;

  const call = simnet.callPublicFn("counter", "add", [Cl.uint(1)], w1);
  console.log(call.result); // Cl.int(Cl.ok(true))

  const counter = simnet.getDataVar("counter", "counter");
  console.log(counter); // Cl.int(2)
}

main();

By default, the SDK will look for a Clarinet.toml file in the current working directory. It's also possible to provide the path to the manifest like so:

 const simnet = await initSimnet("./path/to/Clarinet.toml");

Tests

The SDK can be used to write unit tests for Clarinet projects.

You'll need to have Node.js (>= 18) and NPM setup. If you are not sure how to set it up, Volta is a nice tool to get started.

In the terminal, run node --version to make sure it's available and up to date.

Note: A bit of boilerplate is needed to setup the testing environment. Soon it will be handled by the clarinet-cli.

Open your terminal and go to a new or existing Clarinet project:

cd my-project
ls # you should see a Clarinet.toml file in the list

Run the following command to setup the testing framework:

npx @hirosystems/clarinet-sdk

Visit the clarity starter project to see the testing framework in action.

Type checking

We recommend to use TypeScript to write the unit tests, but it's also possible to do it with JavaScript. To do so, rename your test files to .test.js instead of .test.ts. You can also delete the tsconfig.json and uninstall typescript with npm uninstall typescript.

Note: If you want to write your test in JavaScript but still have a certain level of type safety and autocompletion, VSCode can help you with that. You can create a basic jsconfig.json file:

{
  "compilerOptions": {
    "checkJs": true,
    "strict": true
  },
  "include": ["node_modules/@hirosystems/clarinet-sdk/vitest-helpers/src", "unit-tests"]
}

Contributing

Clone the clarinet repo and go to the clarinet-sdk component directory:

git clone [e-mail]:hirosystems/clarinet.git
cd clarinet/components/clarinet-sdk

Open the SDK workspace in VSCode:

code ./clarinet-sdk.code-workspace

Compile the project (both WASM and JS):

npm install
npm run build