firebird: listen events

waitevents.js

var drev = require('drev')
  , fb = require('firebird');

var conn = fb.createConnection();
conn.connectSync('nodejs:/opt/firebird/dbs/testdb.fdb', 'SYSDBA', 'masterkey', '');
conn.addFBevent("fbevent");
conn.on("fbevent",function(event,count){
  console.log('GOT EVENT');
  drev.emit('newevent', 'any text');
});

drev.on('newevent', function(msg){console.log('GOT DREV EVENT')});

function wait4ever () {
  process.nextTick(wait4ever);
};

process.nextTick(wait4ever);
drev.start();

hi, how can i install drev component?

Not sure that you relly need to use such ancient package: https://www.npmjs.com/package/drev
It was published/updated more than 10 years ago.