hc-base

JS Stellar Base

The hc-base library is the lowest-level stellar helper library. It consists of classes to read, write, hash, and sign the xdr structures that are used in hc-core. This is an implementation in JavaScript that can be used on either Node.js or web browsers.

• API Reference

Warning! Node version of this package is using sodium-native package, a native implementation of Ed25519 in Node.js, as an optional dependency. This means that if for any reason installation of this package fails, hc-base will fallback to the much slower implementation contained in tweetnacl.

If you are using hc-base in a browser you can ignore this. However, for production backend deployments you should definitely be using sodium-native. If sodium-native is successfully installed and working HCBase.FastSigning variable will be equal true. Otherwise it will be false.

Quick start

Using npm to include js-hc-base in your own project:

npm install --save hc-base

For browsers, use Bower to install it. It exports a variable HCBase. The example below assumes you have hc-base.js relative to your html file.

<script src="hc-base.js"></script>
<script>
  console.log(HCBase);
</script> 

Install

To use as a module in a Node.js project

1. Install it using npm:

npm install --save hc-base

1. require/import it in your JavaScript:

var HCBase = require('hc-base');

To self host for use in the browser

1. Install it using bower:

bower install hc-base

1. Include it in the browser:

<script src="./bower_components/hc-base/hc-base.js"></script>
<script>
  console.log(HCBase);
</script> 

If you don't want to use install Bower, you can copy built JS files from the bower-js-hc-base repo.

To use the cdnjs hosted script in the browser

1. Instruct the browser to fetch the library from cdnjs, a 3rd party service that hosts js libraries:

<script src="https://cdnjs.cloudflare.com/ajax/libs/hc-base/{version}/hc-base.js"></script>
<script>
  console.log(HCBase);
</script> 

Note that this method relies using a third party to host the JS library. This may not be entirely secure.

Make sure that you are using the latest version number. They can be found on the releases page in Github.

To develop and test js-hc-base itself

1. Install Node 6.14.0

Because we support earlier versions of Node, please install and develop on Node 6.14.0 so you don't get surprised when your code works locally but breaks in CI.

If you work on several projects that use different Node versions, you might find helpful to install a nodejs version manager.

• https://github.com/creationix/nvm
• https://github.com/wbyoung/avn
• https://github.com/asdf-vm/asdf

1. Install Yarn

This project uses Yarn to manages its dependencies. To install Yarn, follow the project instructions available at https://yarnpkg.com/en/docs/install.

1. Clone the repo

git clone http://42.159.80.103:8080/huachain/js-hc-base.git

1. Install dependencies inside js-hc-base folder

cd js-hc-base
yarn install

1. Observe the project's code style

While you're making changes, make sure to run the linter-watcher to catch any linting errors (in addition to making sure your text editor supports ESLint)

node_modules/.bin/gulp watch

If you're working on a file not in src, limit your code to Node 6.16 ES! See what's supported here: https://node.green/ (The reason is that our npm library must support earlier versions of Node, so the tests need to run on those versions.)

Updating XDR definitions

1. Make sure you have Ruby installed. You can either use a global installation, or use a version manager.

• https://www.ruby-lang.org/en/downloads/
• https://github.com/rbenv/rbenv
• https://rvm.io
• https://github.com/asdf-vm/asdf

1. Install Bundler.
2. Install all dependencies.

bundle install

1. Copy xdr files from http://42.159.80.103:8080/huachain/hc-core/tree/master/src/xdr to ./xdr.
2. Run yarn xdr js-hc-base folder.

Usage

For information on how to use js-hc-base, take a look at the docs in the docs folder.

Testing

To run all tests:

gulp test

To run a specific set of tests:

gulp test:node
gulp test:browser

Tests are also run on the Travis CI js-hc-base project automatically.

Documentation

Documentation for this repo lives inside the docs folder.

Contributing

Please see the CONTRIBUTING.md for details on how to contribute to this project.

Publishing to npm

npm version [<newversion> | major | minor | patch | premajor | preminor | prepatch | prerelease]

A new version will be published to npm and Bower by Travis CI.

npm >=2.13.0 required. Read more about npm version.

License

js-hc-base is licensed under an Apache-2.0 license. See the LICENSE file for details.