Cannot join to a server hosted by minecraft-protocol on 1.15

The story

I installed minecraft-protocol via: npm i git+https://github.com/PrismarineJS/node-minecraft-protocol because NPM version seems a little bit outdated.

So I’m using the latest committed version from master branch, which at this moment is 28b52a91589215f985d513102ddcd201a2d248a6

Of course I verified that:

$ npm ls minecraft-protocol
mp-test@1.0.0 C:\Users\kazi\Code\mp-test
`-- minecraft-protocol@1.11.0  (git+https://github.com/PrismarineJS/node-minecraft-protocol.git#28b52a91589215f985d513102ddcd201a2d248a6)

And I tried to run ‘hello world’ example (with both online-mode and encryption disabled):

const mc = require('minecraft-protocol')

const server = mc.createServer({
    'online-mode': false,
    encryption: false,
    host: '0.0.0.0',
    port: 25565
})

server.on('login', client => {
    client.write('login', {
        entityId: client.id,
        levelType: 'default',
        gameMode: 0,
        dimension: 0,
        difficulty: 2,
        maxPlayers: server.maxPlayers,
        reducedDebugInfo: false
    })

    client.write('position', {
        x: 0,
        y: 1.62,
        z: 0,
        yaw: 0,
        pitch: 0,
        flags: 0x00
    })
})

Expectations

• should work flawlessly on 1.15.x, like it does on 1.14.4

Reality

$ DEBUG=minecraft-protocol node app.js
  minecraft-protocol read packet handshaking.set_protocol +0ms
  minecraft-protocol {
  minecraft-protocol   "protocolVersion": 578,
  minecraft-protocol   "serverHost": "127.0.0.1",
  minecraft-protocol   "serverPort": 25565,
  minecraft-protocol   "nextState": 2
  minecraft-protocol } +2ms
  minecraft-protocol read packet login.login_start +3ms
  minecraft-protocol {
  minecraft-protocol   "username": "kazigk"
  minecraft-protocol } +1ms
  minecraft-protocol writing packet login.compress +1ms
  minecraft-protocol { threshold: 256 } +0ms
  minecraft-protocol writing packet login.success +4ms
  minecraft-protocol { uuid: 'e3975c5f-6b2d-3e85-a377-feea362a5b82', username: 'kazigk' } +1ms
  minecraft-protocol writing packet play.login +204ms
  minecraft-protocol {
  minecraft-protocol   entityId: 0,
  minecraft-protocol   levelType: 'default',
  minecraft-protocol   gameMode: 0,
  minecraft-protocol   dimension: 0,
  minecraft-protocol   difficulty: 2,
  minecraft-protocol   maxPlayers: 20,
  minecraft-protocol   reducedDebugInfo: false
  minecraft-protocol } +0ms
  minecraft-protocol writing packet play.kick_disconnect +3ms
  minecraft-protocol {
  minecraft-protocol   reason: `{"text":"TypeError: Serialization error for play.toClient.login.hashedSeed : Write error for params.login.hashedSeed : Cannot read property '0' of undefined"}`
  minecraft-protocol } +3ms
  minecraft-protocol writing packet play.position +3ms
  minecraft-protocol { x: 0, y: 1.62, z: 0, yaw: 0, pitch: 0, flags: 0 } +3ms
  minecraft-protocol writing packet play.kick_disconnect +3ms
  minecraft-protocol { reason: '{"text":"Error: read ECONNRESET"}' } +0ms

Additional info

• Error was reproduced using Minecraft 1.15.2
• I also tried with release 1.11.0 and Minecraft 1.15.1, same result

[wvffle]

Add hashedSeed: [0, 0] to your login packet data

[wvffle]

Add hashedSeed: [0, 0] to your login packet data

wat is that?

Our packet names differ a bit from the names you have on wiki.vg but here you can find that those are first 8 bits of world’s seed: https://wiki.vg/Protocol#Join_Game