Blockstack JS

Contents

• Installation
• About
• Auth
• Profiles
• Wiki
• Testing

Installation

$ npm install blockstack

About

Blockstack JS is a library for profiles/identity and authentication.

The authentication portion of this library can be used to:

1. create an authentication request
2. create an authentication response

The profiles/identity portion of this library can be used to:

1. transform a JSON profile into cryptographically-signed signed tokens
2. recover a JSON profile from signed tokens
3. validate signed profile tokens

Note: this document uses ES6 in its examples but it is compiled down to Javascript (ES5) and is perfectly compatible with it. If you're using the latter, just make a few adjustments to the examples below (e.g. use "let" instead of "var").

Auth

Request a user to sign in

import { requestSignIn } from 'blockstack'

$('#login-button').click(function() {
    requestSignIn() // The user will be redirected to their identity provider
})

Sign a user in

import { signUserIn } from 'blockstack'

signUserIn((session) => {
    // Redirect the user to the home page
})

Create a raw auth request

import { makeAuthRequest, makeECPrivateKey } from 'blockstack'

const privateKey = makeECPrivateKey()

const appManifest = { name: "Hello, Blockstack", start_url: "https://helloblockstack.com" }
const authRequest = makeAuthRequest(privateKey, appManifest)

Verify an auth request

import { verifyAuthRequest } from 'blockstack'

const verified = verifyAuthRequest(authRequest)

Create an auth response

import { makeAuthResponse, makeECPrivateKey } from 'blockstack'
const privateKey = makeECPrivateKey()

const authData = { profile: { name: 'Naval Ravikant' }, username: 'naval.id' }
const authResponse = makeAuthResponse(privateKey, authData)

Verify an auth response

import { verifyAuthResponse } from 'blockstack'

const verified = verifyAuthResponse(authResponse)

Profiles

Follow these steps to create and register a profile for a Blockchain ID:

1. Create a JSON profile object
2. Split up the profile into tokens, sign the tokens, and put them in a token file
3. Create a zone file that points to the web location of the profile token file

Create a profile

const profileOfNaval = {
  "@context": "http://schema.org/",
  "@type": "Person",
  "name": "Naval Ravikant",
  "description": "Co-founder of AngelList"
}

Sign a profile as a single token

import { makeECPrivateKey, wrapProfileToken, Person } from 'blockstack'

const privateKey = makeECPrivateKey()

const person = new Person(profileOfNaval)
const token = person.toToken(privateKey)
const tokenFile = [wrapProfileToken(token)]

Verify an individual token

import { verifyProfileToken } from 'blockstack'

try {
  const decodedToken = verifyProfileToken(tokenFile[0].token, publicKey)
} catch(e) {
  console.log(e)
}

Recover a profile from a token file

const recoveredProfile = Person.fromToken(tokenFile, publicKey)

Validate profile schema

const validationResults = Person.validateSchema(recoveredProfile)

Validate a proof

import { validateProofs } from 'blockstack'

const domainName = "naval.id"
validateProofs(profile, domainName).then((proofs) => {
  console.log(proofs)
})

Testing

$ npm run test

Testing in a browser

This test will only work with your browser's Cross-Origin Restrictions disabled.

Run npm run compile; npm run browserify before opening the file test.html in your browser.