How to convert rate from any currency to base currency in magento 2

Question

class Data extends AbstractHelper
{
    protected $_storeManager;
    protected $_currencyFactory;

    public function __construct(
        \Magento\Store\Model\StoreManagerInterface $storeManager,
        \Magento\Directory\Model\CurrencyFactory $currencyFactory,
        ) {
        $this->_storeManager = $storeManager;
        $this->_currencyFactory = $currencyFactory;
        parent::__construct($context);
    }

    function convertRate(){
        $quoteAmmount = 15;
        $baseCurrencyCode = $this->_storeManager->getStore()->getBaseCurrency()->getCode();
        $quoteCurrency = 'CAD';
        $rateToBase = $this->_currencyFactory->create()->load($quoteCurrency)->getAnyRate($baseCurrencyCode);
        $totalAmount = $quoteAmmount * $rateToBase;
    }
}

This is my custom code and I want to convert my CAD quote price to my store base currency which is USD. But this code returned 0.
What is the problem?

Answer 1

Take a look at vendor/magento/module-directory/Helper/Data.php

public function currencyConvert($amount, $from, $to = null)
{
    if (empty($this->_currencyCache[$from])) {
        $this->_currencyCache[$from] = $this->_currencyFactory->create()->load($from);
    }
    if ($to === null) {
        $to = $this->_storeManager->getStore()->getCurrentCurrencyCode();
    }
    $converted = $this->_currencyCache[$from]->convert($amount, $to);
    return $converted;
}

I think you can use this function:

$this->directoryHelper->currencyConvert($quoteAmmount, $quoteCurrencyCode, $baseCurrencyCode);

Answer 2

Try to use this below code :

class Data extends AbstractHelper
{
    protected $_storeManager;
    protected $_priceCurrency;

    public function __construct(
        \Magento\Store\Model\StoreManagerInterface $storeManager,
        \Magento\Framework\Pricing\Helper\Data $priceCurrency,
        ) {
        $this->_storeManager = $storeManager;
        $this->_priceCurrency = $priceCurrency;
        parent::__construct($context);
    }

    function convertRate(){
        $quoteAmmount = 15;
        $rate = $this->_priceCurrency->currency($quoteAmmount, true, true);
        return $rate;
    }
}