vc-status-manager

status-manager

This library enables managing statues of Verifiable Credentials in a decentralized manner using the Tezos Blockchain. It uses the Status List 2021 specification as base principle to do so.

Installation

This package requires NodeJS and NPM installed.

git clone https://github.com/GravityID/status-manager.git
cd status-manager
npm i

Usage

It is possible to use this package either by integrating it on a Typescript / Javascript code or by running its CLI

With code

This is the primary way of using the Status Manager package. It unlocks all the possibilities of the package directly embedded in an existing Typescript or Javascript code.

Originate

Deploy an instance of Status Manager with an initial status list

import { InMemorySigner } from "@taquito/signer";
import { originate } from "status-manager";

const key = "edsk...";
const signer = await InMemorySigner.fromSecretKey(key);
const purpose = "revocation";
const size = 16384;

await originate(signer, purpose, size);

Revoke

Revoke a Verifiable Credential associated with a Status Manager whose purpose is revocation. It changes the storage of the on-chain Status Manager.

import { InMemorySigner } from "@taquito/signer";
import { revoke } from "status-manager";

const key = "edsk...";
const signer = await InMemorySigner.fromSecretKey(key);
const vc = {
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://w3id.org/vc/status-list/2021/v1"
  ],
  "id": "https://example.com/credentials/23894672394",
  "type": ["VerifiableCredential"],
  "issuer": "did:example:12345",
  "issued": "2020-04-05T14:27:42Z",
  "credentialStatus": {
    "id": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB#94567",
    "type": "StatusList2021Entry",
    "statusPurpose": "revocation",
    "statusListIndex": "94567",
    "statusListCredential": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB",
  },
  "credentialSubject": {
    "id": "did:example:6789",
    "type": "Person"
  }
}

await revoke([vc], signer);

Suspend

Suspend a Verifiable Credential associated with a Status Manager whose purpose is suspension. It changes the storage of the on-chain Status Manager.

import { InMemorySigner } from "@taquito/signer";
import { suspend } from "status-manager";

const key = "edsk...";
const signer = await InMemorySigner.fromSecretKey(key);
const vc = {
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://w3id.org/vc/status-list/2021/v1"
  ],
  "id": "https://example.com/credentials/23894672394",
  "type": ["VerifiableCredential"],
  "issuer": "did:example:12345",
  "issued": "2020-04-05T14:27:42Z",
  "credentialStatus": {
    "id": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB#94567",
    "type": "StatusList2021Entry",
    "statusPurpose": "suspension",
    "statusListIndex": "94567",
    "statusListCredential": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB",
  },
  "credentialSubject": {
    "id": "did:example:6789",
    "type": "Person"
  }
}

await suspend([vc], signer);

Unsuspend

Unsuspend a Verifiable Credential associated with a Status Manager whose purpose is suspension. It changes the storage of the on-chain Status Manager.

import { InMemorySigner } from "@taquito/signer";
import { unsuspend } from "status-manager";

const key = "edsk...";
const signer = await InMemorySigner.fromSecretKey(key);
const vc = {
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://w3id.org/vc/status-list/2021/v1"
  ],
  "id": "https://example.com/credentials/23894672394",
  "type": ["VerifiableCredential"],
  "issuer": "did:example:12345",
  "issued": "2020-04-05T14:27:42Z",
  "credentialStatus": {
    "id": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB#94567",
    "type": "StatusList2021Entry",
    "statusPurpose": "suspension",
    "statusListIndex": "94567",
    "statusListCredential": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB",
  },
  "credentialSubject": {
    "id": "did:example:6789",
    "type": "Person"
  }
}

await unsuspend([vc], signer);

Resolve

Build a StatusList2021Credential from a Status Manager. The result can be cached in order to be accessible offline.

import { InMemorySigner } from "@taquito/signer";
import { resolve } from "status-manager";

const id = "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB";
const vc = await resolve(id);

console.log(vc);

/**
 * {
 *   "@context": [
 *     "https://www.w3.org/2018/credentials/v1",
 *     "https://w3id.org/vc/status-list/2021/v1"
 *   ],
 *   "id": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB",
 *   "type": [
 *     "VerifiableCredential",
 *     "StatusList2021Credential"
 *   ],
 *   "issuer": "did:pkh:tz:tz1aSkwEot3L2kmUvcoxzjMomb9mvBNuzFK6",
 *   "credentialSubject": {
 *     "id": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB#list",
 *     "type": "StatusList2021",
 *     "statusPurpose": "revocation",
 *     "encodedList": "H4sIAAAAAAAAA-3BMQEAAADCoPVPbQwfoAAAAAAAAAAAAAAAAAAAAIC3AYbSVKsAQAAA"
 *   }
 * }
 */

Read status

Check whether a Verifiable Credential is marked with a status or not. This method directly reads from the on-chain Status Manager.

import { InMemorySigner } from "@taquito/signer";
import { isMarked } from "status-manager";

const vc = {
  "@context": [
    "https://www.w3.org/2018/credentials/v1",
    "https://w3id.org/vc/status-list/2021/v1"
  ],
  "id": "https://example.com/credentials/23894672394",
  "type": ["VerifiableCredential"],
  "issuer": "did:example:12345",
  "issued": "2020-04-05T14:27:42Z",
  "credentialStatus": {
    "id": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB",
    "type": "StatusList2021Entry",
    "statusPurpose": "revocation",
    "statusListIndex": "94567",
    "statusListCredential": "slist://KT1U4xsumuCWY7UZRrr7hVGtqEi2MsuisUUB"
  },
  "credentialSubject": {
    "id": "did:example:6789",
    "type": "Person"
  }
}
const marked = await isMarked(vc);

console.log(marked); // boolean

With CLI

A command-line interface (CLI) is also available for developers to use and does not require any software integration.

jean@pc-de-jean:~/Projects/Code/status-manager$ ./bin/cli.js -h
Usage: status-manager [options] [command]

Options:
  -V, --version                output the version number
  -h, --help                   display help for command

Commands:
  originate [options]          deploy an instance of Status Manager with an initial status list
  resolve [options] <manager>  build a StatusList2021Credential from a Status Manager
  is-marked [options]          check whether a Verifiable Credential is marked or not
  revoke [options]             revoke a Verifiable Credential associated with a Status Manager
  suspend [options]            suspend a Verifiable Credential associated with a Status Manager
  unsuspend [options]          unsuspend a Verifiable Credential associated with a Status Manager
  help [command]               display help for command