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<?php
declare(strict_types=1);
namespace Money\Exchange;
use Money\Currency;
use Money\CurrencyPair;
use Money\Exception\UnresolvableCurrencyPairException;
use Money\Exchange;
/**
* Provides a way to get exchange rate from a static list (array).
*/
final class FixedExchange implements Exchange
{
/** @psalm-var array<non-empty-string, array<non-empty-string, numeric-string>> */
private array $list;
/** @psalm-param array<non-empty-string, array<non-empty-string, numeric-string>> $list */
public function __construct(array $list)
{
$this->list = $list;
}
public function quote(Currency $baseCurrency, Currency $counterCurrency): CurrencyPair
{
if (isset($this->list[$baseCurrency->getCode()][$counterCurrency->getCode()])) {
return new CurrencyPair(
$baseCurrency,
$counterCurrency,
$this->list[$baseCurrency->getCode()][$counterCurrency->getCode()]
);
}
throw UnresolvableCurrencyPairException::createFromCurrencies($baseCurrency, $counterCurrency);
}
}