getExchangeRate method
Returns the exchange rate which matches with from
and to
currencies.
If this does not exist in this list, it returns null
.
Implementation
ExchangeRate? getExchangeRate({
required Currency from,
required Currency to,
}) {
try {
return firstWhere((e) => e.from == from && e.to == to);
// ignore: avoid_catches_without_on_clauses
} catch (e) {
return null;
}
}