Pkarr

JavaScript implementation of Pkarr.

Usage

CLI

Publish resource records by passing a passphrase.

$ pkarr publish
◌  Enter a passphrase (learn more at https://www.useapassphrase.com/)
   Passphrase: ***********
   ❯ pk:54ftp7om3nkc619oaxwbz4mg4btzesnnu1k63pukonzt36xq144y
◌  Enter records to publish:
   ❯ foo bar
   ❯ answer 42
   ❯ Add record or press enter to submit
 ✔ Published Resource Records (8.29 seconds)

Resolve resource records of a public key

$ pkarr resolve pk:54ftp7om3nkc619oaxwbz4mg4btzesnnu1k63pukonzt36xq144y
 ✔ Resolved (1.51 seconds)
  ❯ foo    bar
  ❯ answer 42

  › updated_at: 4/9/2023, 8:48:21 AM
  › size      : 39/1000 bytes
  › from      : 129.159.143.235:8999

Keep your or your friend's records alive

$ pkarr keepalive add [url1] [url2] ...
 ✔  Successfully updated list of keys!

$ pkarr keepalive remove [url1] [url2] ...
 ✔  Successfully updated list of keys!

$ pkarr keepalive list
  ❯  yqrx81zchh6aotjj85s96gdqbmsoprxr3ks6ks6y8eccpj8b7oiy

$ pkarr keepalive
Starting republisher...

Relay

Run an HTTP relay to use Pkarr in UDP-less environments. Read more

pkarr relay

Consider adding your relay to the list of free and public relays

Client

In browsers and devices behind NAT, you can make HTTP requests to a any pkarr server.

import { Pkarr, SignedPacket, generateKeyPair } from '../index.js'

const keypair = generateKeyPair()

{
  // Create a DNS packet
  const packet = {
    id: 0,
    type: 'response',
    flags: 0,
    answers: [
      { name: '_matrix', type: 'TXT', class: 'IN', data: '@foobar:example.com' }
    ]
  }

  // Create a Sgined Packet
  const signedPacket = SignedPacket.fromPacket(keyPair, packet)

  // Send it to a relay
  const response = await Pkarr.relayPut(serverA.address, signedPacket)
}

{
  // === Resolve a packet ===
  const signedPacket = await Pkarr.relayGet(serverB.address, keyPair.publicKey)

  // Get a dns packet corrisponding to a public key from another server
  const {seq, packet} = Pkarr.resolve(key, ["relay.pkarr.org"])
}

API

Pkarr.relayPut(relayAddress, signedPacket)

Send a SignedPacket to a the DHT through an HTTP relay.

const signedPacket = Pkarr.relayGet(relayAddress, publicKey)

Get a SignedPacket from the DHT through an HTTP relay.

If returned, SignedPacket is valid and verified.

const signedPacket = SignedPacket.fromPacket(keyPair, dnsPacket)

Create a SignedPacket from a dns packet and a KeyPair

Notice that internally it will add the zbase32 encoded publicKey as the TLD of every answer in the packet, for example record {name: 'foo', data: 'bar'} will become {name: 'foo.8pinxxgqs41n4aididenw5apqp1urfmzdztr8jt4abrkdn435ewo', data: 'bar'}.

const signedPacket = SignedPacket.fromBytes(publicKey, bytes)

Create a SignedPacket from bytes received from the HTTP relay, after verifying the signature.

const publicKey = signedPacket.publicKey()

Returns the publicKey

const bytes = signedPacket.bytes()

Returns the bytes of the signature, encoded timestamp and encoded packet as defined in the relay spec.

const signature = signedPacket.signature()

Returns the Signature of the signed packet

const packet = signedPacket.packet()

Returns the DNS packet

const records = signedPacket.resourceRecord(name)

Returns the resource records from the internal dns packet, that matches name, which can be relative to the TLD so you don't have to pass the full name, so foo instead of foo.8pinxxgqs41n4aididenw5apqp1urfmzdztr8jt4abrkdn435ewo