Taux de change

$rates = $orqex->exchangeRates()->latest('USD');

$rates->base;            // "USD"
$rates->date;            // horodatage de capture
$rates->rateFor('XOF');  // float|null
$rates->rates;           // ['XOF' => 600.5, 'EUR' => 0.92, ...]

$currencies = $orqex->exchangeRates()->supportedCurrencies();

foreach ($currencies as $currency) {
    $currency->code;    // "USD"
    $currency->name;    // "US Dollar"
    $currency->symbol;  // "$"
}