const NatAPI = require('nat-api')

// For NAT-PMP + NAT-UPNP, use:
const client = new NatAPI({ enablePMP: true, enableUPNP: true })

// Note: upnpPermanentFallback is disabled by default, meaning leases on routers which only support UPnP permanent leases will fail, this includes RouterOS/Mikrotik, Netgear, and other ISP provided routers. 

// Map public port 1000 to private port 1000 with UDP and TCP
client.map(1000).then(() => {
  console.log('Port mapped!')
}).catch((err) => {
  return console.log('Error', err)
})

// Map public port 2000 to private port 3000 with UDP and TCP
client.map(2000, 3000).then(() => {
  console.log('Port mapped!')
}).catch((err) => {
  return console.log('Error', err)
})

// Map public port 4000 to private port 5000 with only UDP
client.map({ publicPort: 4000, privatePort: 5000, ttl: 1800, protocol: 'UDP' }).then(() => {
  console.log('Port mapped!')
}).catch((err) =>{
  return console.log('Error', err)
})

// Unmap port public and private port 1000 with UDP and TCP
client.unmap(1000).then(() => {
  console.log('Port unmapped!') 
}).catch((err) => {
  return console.log('Error', err)
})

// Get external IP
client.externalIp().then((ip) => {
  console.log('External IP:', ip)
}).catch((err) => {
  return console.log('Error', err)
})

// Destroy object
client.destroy().then(() => {
  console.log('Client has been destroyed!')
}).catch((err) => {
  return console.log('Error', err)
})

{
  ttl: 1200, // Time to live of each port mapping in seconds (default: 1200)
  autoUpdate: true, // Refresh all the port mapping to keep them from expiring (default: true)
  gateway: '192.168.1.1', // Default gateway (default: null)
  enablePMP: false, // Enable PMP (default: true)
  enableUPNP: false, // Enable UPNP (default: true)
  upnpPermanentFallback: false // Enable UPNP permanent leases fallback (default: false)
}