SwapExchange.php

<?php
 
namespace Money\Exchange;
 
use Exchanger\Exception\Exception as ExchangerException;
use Money\Currency;
use Money\CurrencyPair;
use Money\Exception\UnresolvableCurrencyPairException;
use Money\Exchange;
use Swap\Swap;
 
final class SwapExchange implements Exchange
{
    private $swap;
 
    public function __construct(Swap $swap)
    {
        $this->swap = $swap;
    }
 
    public function quote(Currency $baseCurrency, Currency $counterCurrency)
    {
        try {
            $rate = $this->swap->latest($baseCurrency->getCode().'/'.$counterCurrency->getCode());
        } catch (ExchangerException $e) {
            throw UnresolvableCurrencyPairException::createFromCurrencies($baseCurrency, $counterCurrency);
        }
 
        return new CurrencyPair($baseCurrency, $counterCurrency, $rate->getValue());
    }
}