npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@cardstack/did-resolver

v1.0.54

Published

A javascript resolver for the cardstack DID method

Downloads

559

Readme

cardstack DID Resolver

This library is intended to resolve Cardstack Decentralized Identifiers to their associated DID Documents.

It supports the proposed Decentralized Identifiers spec from the W3C Credentials Community Group.

It requires the did-resolver library, which is the primary interface for resolving DIDs.

There is a python-equivalent version for Cardstack services in another subpackage.

DID method

Cardstack supports a family of DIDs that begin with did:cardstack:

DID Document

The DID resolver takes the DID and constructs the DID Document.

Resolving a DID document

The resolver presents a simple resolver() function that returns a ES6 Promise returning the DID document.

import { Resolver } from 'did-resolver'
import { getResolver } from '@cardstack/did-resolver'

const cardstackResolver = getResolver()

const didResolver = new Resolver({
    ...cardstackResolver
    //...you can flatten multiple resolver methods into the Resolver
})

didResolver.resolve('did:cardstack:1p123456...').then(result => console.log(result.didDocument))

// You can also use async/await syntax
(async () => {
    const result = await didResolver.resolve('did:cardstack:1p123456...');
    console.log(result.didDocument);
})();

The resolved DIDDocument will have a alsoKnownAs property that is an array containing a URL to a json document with details of the resource.

Encoding a DID

This package exports an encodeDID function that can be used to create a DID string.

import { encodeDID } from '@cardstack/did-resolver'

let did = encodeDID({ type: 'SupplierInfo' });
console.log(did); // => 'did:cardstack:1sicq4U2Dq678AtWufbxJBg7120d206cf61b50d4'

By default, encodeDID will provide the version and generate a uniqueId for you, but you can also specify them:

import { encodeDID } from '@cardstack/did-resolver'
import shortUuid from 'short-uuid';

let did = encodeDID({ type: 'SupplierInfo', version: 5, uniqueId: shortUuid.generate() });

About the cardstack method identifier format

An example of a cardstack method identifier is:

1sicq4U2Dq678AtWufbxJBg7120d206cf61b50d4
12[---------3----------][------4-------]

Let's break down the parts:

  1. First character: represents the version, uses "0"-"9" for 0-9, "A-Z" for 10-35, "a-z" for 36-61

  2. Second character: represents the type, 'p' for PrepaidCardCustomization, 'm' for MerchantInfo, 's' for SupplierInfo, 'r' for RewardRule

  3. Next 22 characters: unique identifier, you can generate this using shortUuid.generate()

  4. Last 16 characters: checksum, hash of the identifier up to this point, calculated using shake_128 with 64 bits of output