Canton Node SDK

A TypeScript SDK for interacting with Canton blockchain nodes.

📚 Documentation

For complete documentation, examples, and API references, visit: https://sdk.canton.fairmint.com/

Specialized Guides

• 🔐 External Signing Guide - Create and manage external parties with user-controlled private keys

Quick Start

npm install @fairmint/canton-node-sdk

import { LedgerJsonApiClient } from '@fairmint/canton-node-sdk';

const client = new LedgerJsonApiClient(config);
const version = await client.getVersion();

For Contributors

See CONTRIBUTING.md for information about setting up the development environment.

Testing with LocalNet

The SDK includes comprehensive integration testing against a local Splice network (LocalNet). See the LocalNet Testing Guide for detailed instructions.

We also provide integration tests following the cn-quickstart approach. See test/integration/quickstart/README.md for details.

Quick Start

# Setup CN-Quickstart LocalNet (recommended)
npm run localnet:quickstart

# Environment variables are written to .env.localnet
cat .env.localnet

# Configure SDK environment
cp example.env.localnet .env

# Start LocalNet
npm run localnet:start

# Run regression tests
npm run test:regression

# Or run quickstart-style integration tests
npm run test:integration

# Stop LocalNet
npm run localnet:stop

ℹ️ If you run npm run localnet:setup instead of the quickstart, make sure you have a GITHUB_TOKEN (or SPLICE_GITHUB_TOKEN) with read access to the Splice releases exported so the bundle download can succeed.

Available Commands

• npm run localnet:quickstart - Setup CN-Quickstart LocalNet (recommended)
• npm run localnet:setup - Download and setup Splice LocalNet (alternative)
• npm run localnet:start - Start LocalNet services
• npm run localnet:stop - Stop LocalNet services
• npm run localnet:status - Check LocalNet status
• npm run test:integration - Run quickstart-style integration tests
• npm run test:localnet - Run tests against LocalNet
• npm run test:regression - Alias for test:localnet

CI/CD

The project uses CircleCI for continuous integration:

• Unit Tests: Run on every commit
• Linting: Code quality checks on every commit
• Integration Tests: LocalNet regression tests on every commit
• Nightly Regression: Scheduled daily tests at 2 AM UTC

See .circleci/config.yml for the complete CI configuration.