const wif = '5JBFvTeSY5...'; // WIF string generated (private key)
address: 'NX2BTV43XN6BOTCYZUUFU6TK7DVOC4LU', // The Obyte address of the recipient
amount: 1000 // The amount he receives
client.post.payment(params, wif, function(err, result) {
if (err) return console.error(err);
console.log(result); // The unit hash is returned