PROTOCOL.md

Proxy Protocol

The proxy is a websocket connection with simple instructions required.

First, is that all data sent to the websocket connection must be compressed at the maximum level with zlib. If decompression fails at the proxy side, it will return a compressed message containing Failed decompressing message.

And all data received from the websocket server is also compressed the same way.
Lastly, there is only one available command for the proxy. All other data is sent to the ENet Server.

The command is the INIT command, with the structure of INIT:IP@PORT@TYPE. Where IP is the ip of the ENet server to connect to. PORT being the port, and TYPE is whether or not to enable growtopia's new packet protocol. 1 if you want to enable it, or any value will other than 1 will not enable it.

Once a websocket connection closes, the ENet connection should be closed as well.
Same for the other way around.

Example:

// native zlib library
const {
  // i do not recommend using the sync methods, instead use the ones that require callbacks and convert them to promises.
  inflateSync,
  deflateSync,
  constants
} = require('zlib')

// nodejs ws client
const Websocket = require('ws')

const pack   = (buf) => deflateSync(buf, { level: constants.Z_MAX_LEVEL })
const unpack = (buf) => inflateSync(buf, { level: constants.Z_MAX_LEVEL })

const ws = new Websocket('ws://127.0.0.1')
ws.bufferType = 'arraybuffer'

ws.on('open',
  () => ws.send(pack('INIT:213.179.209.168@17197@1')) /*real gt server*/
)

ws.on('message', (chunk) => {
  // unpack compressed data
  chunk = unpack(Buffer.from(chunk))

  // handle the decompressed data here
})