How would one handle arithmetics across different currencies?

[valeeum]

Is there a built-in mechanism for currency conversion arithmetics?

[ofumbi]

src_amount = '2306.56' // USD you need to convert
var ratio = 1.23 ; // exchange ratio USD=>EUR
var src = Money['USD'];
var src_len = src.decimal_digits;
var dst = Money['EUR'];
var dst_len = dst.decimal_digits;
var subunitDifference = src_len - dst_len;
ratio = ratio / Math.pow(10, subunitDifference);
var src_amt = Money.fromDecimal(src_amount, 'USD' , Math.ceil);
var counterValue = src_amt.multiply(ratio, Math.ceil);
var dst_amt = new Money(counterValue.getAmount(), 'EUR');

[davidkalosi]

maybe we could add a CurrencyConverter implementation that would expose a method like this
var currencyConverter = new CurrencyConverter(); var target = currencyConverter.convert(source, ratio);