Failed to run server when use level@8

[mvtm-dn]

Unhandled exception during server initialization for leveldb@8.

Code:

const multileveldown = require('multileveldown')
const { Level } = require('level')
const net = require('net')

function server() {
const db = new Level('db')

const server = net.createServer(function (sock) {
  sock.on('error', function () {
    sock.destroy()
  })

  sock.pipe(multileveldown.server(db)).pipe(sock)
})

console.log('Server');
server.listen(9000);
console.log('Server started');
}

function client() {
const db = multileveldown.client()

const sock = net.connect(9000)
console.log('Client');
sock.pipe(db.connect()).pipe(sock)
console.log('Client started');

db.put('hello', 'world', function () {
  db.get('hello', console.log)
})
}
server();
client();

Expected

# node ./server.js 
Server
Server started
Client
Client started
null world

That is what you get

# node ./server.js 
Server
Server started
Client
Client started
/home/mvtm/projects/bugs-level/node_modules/multileveldown/server.js:35
  if (db.isOpen()) ready()
         ^

TypeError: db.isOpen is not a function
    at Object.module.exports [as server] (/home/mvtm/projects/bugs-level/node_modules/multileveldown/server.js:35:10)
    at Server.<anonymous> (/home/mvtm/projects/bugs-level/server.js:13:28)
    at Server.emit (node:events:526:28)
    at TCP.onconnection (node:net:1573:8)

[vweevers]

multileveldown is not compatible with abstract-level and thus level@8. Please upgrade to many-level. For more, see:

How do I upgrade to abstract-level?
We've put together several upgrade guides for different modules. [..] If you use a combination of the modules listed here, each must be upgraded to its abstract-level equivalent.
— https://github.com/Level/community#how-do-i-upgrade-to-abstract-level