public class BitcoinWallet implements Betalingslosning, Fremmedvaluta {

	private double balanse = 0;

	private static final double BTC_KURS = 66972.97;

	@Override
	public double konverterFraNok(double antallNok) {
		return antallNok / BTC_KURS;
	}

	@Override
	public void innskudd(double antallNok) {
		balanse += konverterFraNok(antallNok);
	}

	@Override
	public boolean uttak(double antallNok) {
		if (balanse - konverterFraNok(antallNok) < 0) {
			return false;
		}

		balanse -= konverterFraNok(antallNok);
		return true;
	}

	@Override
	public void balanse() {
		System.out.println("Balanse: " + balanse + " BTC.");
	}
}