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Nimiq Keyguard

This README is about setting up your own instances of Nimiq Keyguard.

For information about using the client please refer to the Keyguard Client README.


Install the dev dependencies:


Then you can:

  • run the build script with yarn build [config].
  • run the tests with yarn test.
  • run the typechecker with yarn typecheck.
  • run the typecheck file watcher with yarn watch.
  • run the linter with yarn lint.
  • automatically fix basic things like spacing, commas, indentation and quotes with yarn lintfix.
  • run yarn pr to run all three checks (typecheck, lint, test) as they would for a PR.

Note that it is mostly not necessary to run the build script for development purposes, as the code in src is fully functional and you can use it as an endpoint.

Coding Style

  • Code style is enforced with ESLint. Run yarn lint to see errors.
  • Folder names are in Kebab Case: sign-transaction.
  • Class files are named in Pascal Case: PinInput.js, RpcServer.js.
  • JSDoc @type and @param annotations must have a hyphen between the argument name and description:
 * @param {string} address - The address to search for
  • Folder structure:
- src
    - lib
    - components
    - request
- types
- tests
- config
- tools
- demos
- client
    - src
    - types


You can configure the following values by configuration files located in folder src/config:

  • ALLOWED_ORIGIN: The origin from which requests are accepted. '*' allows all origins.
  • NETWORK: The network to connect with. Use Constants.NETWORK constants.
  • ROOT_REDIRECT: The page where the user is redirected to when accidentally going to root URL.

The config file used for unbuilt code is config.local.js. The build script uses config.testnet.js by default. To use a different file (especially useful for deployment), pass its name as an argument to the build script. yarn build mainnet uses config.mainnet.js.

I18n usage


First, import the I18n.js lib in your HTML's head section. Then, setup your dictionary (details see below) and initialize I18n passing your dictionary and the fallback language that should be used if no translation in the current language has been found.

var myDictionary = {
    'en': {

I18n.initialize(myDictionary, 'en');

I18n will automatically use the language set up in the user's browser.

Translate tag content

<div data-i18n="my-translation">My content</div>

When the I18n gets started, or when the language has been switched, it will look for tags with the data-i18n attribute and put in the appropriate translation. My content will be replaced.

Translate placeholders and value

<input data-i18n-placeholder="my-placeholder-translation"/>
<input data-i18n-value="my-value-translation"/>

Similarily, I18n will translate the texts for value and placeholder.



    "en": {
        "my-translation": "Content in English"
    "de": {
        "my-translation": "Inhalt auf Deutsch"

Language picker

Add LanguagePicker.js to your head and then add a language picker widget to your page:

    const languagePicker = new LanguagePicker();
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