use Binance\Client\Spot\Api\SpotRestApi;
use Binance\Client\Spot\SpotRestApiUtil;
$configurationBuilder = SpotRestApiUtil::getConfigurationBuilder();
$configurationBuilder->apiKey('apiKey')
->privateKey('file:///path/to/private.key')
->retries(5) // Retry up to 5 times
->backOff(500); // 500ms between retries
$api = new SpotRestApi($configurationBuilder->build());