@lisk-did/lisk-decentralized-identifier

A library to work with W3C Decentralized Identifier (DID) for Lisk sidechains with the Lisk DID module

About Lisk

Lisk is an open-source blockchain application platform written in Javascript, designed to bridge the gap between accessibility and web3 adoption. Learn more about Lisk from their official website, as well as it's public GitHub Repository.

About did:lisk Method

did:lisk is a DID method specifically designed for Lisk sidechain, which outlines syntax, data model, and operations that adheres to W3C Decentralized Identifiers (DIDs) Specification.

A did:lisk DID consist of a method, chainspace, namespace, and unique-id that suitable for specific, tailored, self-sovereign identity use case. An example of a did:lisk identifier, is as follows:

did:lisk:enevti:address:lsk9gxy8ua2n5sj7eqvtp554hvce8m39sy39sjwzu

Please refer to the did:lisk method spec draft for further explanation. As its still in under active development, community contribution will be much appreciated.

Getting Started

Sidechain Setup

Since this tool is tailored for Lisk-based sidechains, you need to start by setting up a blockchain client. You can find guidance on configuring your blockchain environment in the official Lisk Documentation, as well as in Lisk Discord #dev-chat channel

Installation

npm install --save @lisk-did/lisk-decentralized-identifier

Usage

You can use this library to retrive on-chain DID Document data, and authorize whether a key is valid within DID document:

import did from '@lisk-did/lisk-decentralized-identifier';
import {cryptography} from 'lisk-sdk';

async function didExample() {
    // get DID document from a sidechain node
    const didDocument = await did.getDIDDocument('did:lisk:enevti:address:lsk9gxy8ua2n5sj7eqvtp554hvce8m39sy39sjwzu', {ipc: '~/.lisk/enevti-core'});

    // authorize a publicKey from a DID document
    const privateKey = <your-private-key>
    const publicKey = cryptography.ed.getPublicKeyFromPrivateKey(privateKey);
    const relationships = await did.cryptography.method.getVerificationRelationship(didDocument, {publicKey: myPublicKey});

    if (relationships.length > 0) {
        // key is authorized
        // do something
    }
}

Documentation

For further explanations, please refer to lisk-did documentation website.

License

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.