public static Currency GetOrderCurrencyByCode <T>(this IResolveFieldContext <T> userContext, string currencyCode)
{
//Try to get a currency from order if currency code is not set explicitly or undefined
var result = userContext.GetOrderCurrency();
//If the passed currency differs from the order currency, we try to find it from the all registered currencies.
if (result == null || (!string.IsNullOrEmpty(currencyCode) && !result.Code.EqualsInvariant(currencyCode)))
{
var allCurrencies = userContext.GetValue <IEnumerable <Currency> >("allCurrencies");
result = allCurrencies?.FirstOrDefault(x => x.Code.EqualsInvariant(currencyCode));
}
if (result == null)
{
throw new OperationCanceledException($"the currency with code '{ currencyCode }' is not registered");
}
return(result);
}