class NoOpExchangeRateCalculator implements ExchangeRateCalculator {

  @Override
  public UnsignedLong calculateMinAmountToAccept(
      final UnsignedLong sendAmount, final Denomination sendAmountDenomination
  ) {
    Objects.requireNonNull(sendAmount);
    Objects.requireNonNull(sendAmountDenomination);
    return UnsignedLong.ZERO;
  }

}