Ecb.php

<?php
namespace Dfe\CurrencyConvert;
use Dfe\CurrencyConvert\Settings as S;
use Magento\Directory\Model\Currency\Import\AbstractImport;
class Ecb extends AbstractImport {
	/**
	 * 2016-01-01
	 * 2022-12-24 We can not declare arguments types because they are undeclared in the overriden method.
	 * @override
	 * @see \Magento\Directory\Model\Currency\Import\AbstractImport::_convert()
	 * @used-by \Magento\Directory\Model\Currency\Import\AbstractImport::fetchRates()
	 * @param string $from
	 * @param string $to
	 */
	protected function _convert($from, $to):float {return df_float(dfa($this->rates($from), $to, 0.0));}

	/**
	 * 2016-01-01
	 * @return array(string => float)
	 */
	private function rates(string $base):array {return dfc($this, function(string $base):array {return dfa(
		# 2018-06-20
		# We should use `http` (not `https`) to avoid the error:
		# «Access Restricted - Your current Subscription Plan does not support HTTPS Encryption.»
		df_http_json('http://data.fixer.io/api/latest', ['access_key' => S::s()->accessKey(), 'base' => $base]), 'rates', []
	);}, [$base]);}
}