quote method
Return the amount of quote currency corresponding to a given amount of the base currency @param currencyAmount the amount of base currency to quote against the price
Implementation
CurrencyAmount quote(CurrencyAmount currencyAmount) {
assert(currencyAmount.currency == baseCurrency, 'TOKEN');
final result = super.multiply(currencyAmount);
return CurrencyAmount.fromFractionalAmount(
quoteCurrency, result.numerator, result.denominator);
}