Binance Fetch Balance Snapshot Watch Balance Updates

<?php
namespace ccxt;
include_once (__DIR__.'/../../ccxt.php');
// ----------------------------------------------------------------------------

// PLEASE DO NOT EDIT THIS FILE, IT IS GENERATED AND WILL BE OVERWRITTEN:
// https://github.com/ccxt/ccxt/blob/master/CONTRIBUTING.md#how-to-contribute-code

// -----------------------------------------------------------------------------

error_reporting(E_ALL);
date_default_timezone_set('UTC');

use ccxt\Precise;
use React\Async;
use React\Promise;


// AUTO-TRANSPILE //
'use strict';


var_dump('CCXT Version:', $ccxt->version); // eslint-disable-line import/no-named-as-default-member


// This example will run silent and will return your balance only when the balance is updated.
//
// 1. launch the example with your keys and keep it running
// 2. go to the trading section on the website
// 3. place a order on a spot market
// 4. see your balance updated in the example
//
// Warning! This example might produce a lot of output to your screen
function watch_balance($exchange) {
    return Async\async(function () use ($exchange) {
        $balance = \React\Async\await($exchange->fetch_balance());
        var_dump('------------- Initial -------------');
        var_dump($exchange->iso8601($exchange->milliseconds()));
        var_dump($balance);
        while (true) {
            try {
                $update = \React\Async\await($exchange->watch_balance());
                $balance = $exchange->deep_extend($balance, $update);
                // it will print the balance update when the balance changes
                // if the balance remains unchanged the exchange will not send it
                var_dump('------------- Update -------------');
                var_dump($exchange->iso8601($exchange->milliseconds()));
                var_dump($balance);
            } catch(Exception $e) {
                var_dump($e);
                break;
            }
        }
    }) ();
}


function main() {
    return Async\async(function () {
        $exchange = new \ccxt\pro\binance(array(
            'apiKey' => 'YOUR_API_KEY',
            'secret' => 'YOUR_SECRET',
        ));
        \React\Async\await($exchange->load_markets());
        // exchange.verbose = true // uncomment for debugging purposes if necessary
        \React\Async\await(watch_balance($exchange));
        \React\Async\await($exchange->close());
    }) ();
}


main();