const ElectrumCli = require('electrum-client')
const main = async () => {
    const ecl = new ElectrumCli(50002, '54.37.88.67', 'tls') // tcp or tls
    await ecl.connect() // connect(promise)
    ecl.subscribe.on('blockchain.headers.subscribe', (v) => console.log(v)) // subscribe message(EventEmitter)
    try{
        const ver = await ecl.server_version("3.3.8", "1.3") // json-rpc(promise)
        console.log(ver)
    } catch(e){
        console.log(e)
    }
    await ecl.close() // disconnect(promise)
}
setInterval(() => { main().catch(err => console.log(err)); });