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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; use Money\Money; /** * Tries the reverse of the currency pair if one is not available. * * Note: adding nested ReversedCurrenciesExchange could cause a huge performance hit. */ final class ReversedCurrenciesExchange implements Exchange { public function __construct(private readonly Exchange $exchange) { } public function quote(Currency $baseCurrency, Currency $counterCurrency): CurrencyPair { try { return $this->exchange->quote($baseCurrency, $counterCurrency); } catch (UnresolvableCurrencyPairException $exception) { $calculator = Money::getCalculator(); try { $currencyPair = $this->exchange->quote($counterCurrency, $baseCurrency); return new CurrencyPair( $baseCurrency, $counterCurrency, $calculator::divide('1', $currencyPair->getConversionRatio()) ); } catch (UnresolvableCurrencyPairException) { throw $exception; } } } }
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