Java Code Examples for com.google.common.primitives.UnsignedLong#bigIntegerValue()

@Override
public JsonElement serialize(UnsignedLong src,
                             Type typeOfSrc,
                             JsonSerializationContext context) {
    return new JsonPrimitive(src.bigIntegerValue());
}
 

@Override
public JsonElement serialize(UnsignedLong src,
                             Type typeOfSrc,
                             JsonSerializationContext context) {
    return new JsonPrimitive(src.bigIntegerValue());
}
 

private synchronized void onNewCanonicalBlockNumber(UnsignedLong newCanonicalBlockNumber) {
  this.latestCanonicalBlockNumber = newCanonicalBlockNumber.bigIntegerValue();
  fetchLatestSubscriptionDeposits();
}
 

/**
 * <p>Properly handle a rejection containing a {@link InterledgerErrorCode#F08_AMOUNT_TOO_LARGE} error code.</p>
 *
 * <p>The goal of this method is to reduce the {@link #maxPacketAmount} (if present) or set a maximum amount if no
 * value is present for {@link #maxPacketAmount}. This is because an F08 error fundamentally means the ILPv4 packet is
 * too big (see NOTE below). In order to do this, this function will first look into the data payload returned by the
 * Connector in {@link InterledgerRejectPacket#getData()}. If values can be computed from here, they will be.
 * Otherwise, the new `maxPacketAmount` will simply be half of {@code prepAmount}, or {@link UnsignedLong#ONE},
 * whichever is greater.</p>
 *
 * <p>
 * NOTE: This condition is not inherently a STREAM error, but is instead an ILPv4 error. From the ILPv4 RFC, an F08
 * error means: "The packet amount is higher than the maximum a connector is willing to forward. Senders MAY send
 * another packet with a lower amount. Connectors that produce this error SHOULD encode the amount they received and
 * their maximum in the data to help senders determine how much lower the packet amount should be." Thus, we can check
 * for an AmountTooLargeErrorData in the reject packet's data. If found, we use it. If not found, we just reduce by
 * the max packet amount by half of the prepared amount (because this value was too high, triggering the F08).
 * </p>
 *
 * @param prepareAmount An {@link UnsignedLong} representing the amount that was originally prepared to the immediate
 *                      peer inside of an {@link InterledgerPreparePacket}.
 * @param rejectPacket  The {@link InterledgerRejectPacket} that was returned from the immediate peer.
 *
 * @return An {@link UnsignedLong} representing the new value of {@link #maxPacketAmount}.
 */
@VisibleForTesting
protected UnsignedLong handleF08Rejection(
    final UnsignedLong prepareAmount, final InterledgerRejectPacket rejectPacket
) {
  Objects.requireNonNull(prepareAmount, "prepareAmount must not be null");
  Objects.requireNonNull(rejectPacket, "rejectPacket must not be null");

  // Compute the newMaxPacketAmount
  UnsignedLong newMaxPacketAmount;
  if (rejectPacket.getData().length > 0) {
    try {
      // Assume there's error data, because their should be.
      final AmountTooLargeErrorData amountTooLargeErrorData =
          streamCodecContext.read(AmountTooLargeErrorData.class, new ByteArrayInputStream(rejectPacket.getData()));

      final BigDecimal prepareAmountAsBigDecimal = new BigDecimal(prepareAmount.bigIntegerValue());
      final BigDecimal detailsMaxAmount = new BigDecimal(amountTooLargeErrorData.maximumAmount().bigIntegerValue());
      final BigDecimal detailsAmountReceived = new BigDecimal(
          amountTooLargeErrorData.receivedAmount().bigIntegerValue());

      if (detailsAmountReceived.equals(BigDecimal.ZERO)) {
        newMaxPacketAmount = halvePrepareAmount(prepareAmount);
      } else {
        // Prepared 10, but only sent 3, max is 2
        // receivedAmount: Local amount received by the connector
        // maxAmount: Maximum amount (inclusive, denominated in same units as the receivedAmount) the connector
        // will forward
        // Equation: new_max_packet_amount = prepare_amount * details.max_amount() / details.amount_received();
        final BigDecimal newMaxPacketAmountAsBigDecimal =
            prepareAmountAsBigDecimal.multiply(detailsMaxAmount).divide(detailsAmountReceived, RoundingMode.FLOOR);
        newMaxPacketAmount = UnsignedLong.valueOf(newMaxPacketAmountAsBigDecimal.toBigIntegerExact());
      }
    } catch (Exception e) {
      // log a warning, but otherwise eat this exception. We'll continue on using default reduction values.
      logger.warn("Unable to decode AmountTooLargeErrorData from F08 Reject packet. Setting newMaxPacketAmount to be "
          + "half the prepare amount. rejectPacket={} error={}", rejectPacket, e
      );
      newMaxPacketAmount = halvePrepareAmount(prepareAmount);
    }
  } else {
    newMaxPacketAmount = halvePrepareAmount(prepareAmount);
    logger.warn(
        "F08 Reject packet had no data payload.  Setting newMaxPacketAmount to be {} (half the prepare amount)",
        newMaxPacketAmount
    );
  }

  final UnsignedLong newMaxPacketAmountFinal = newMaxPacketAmount;
  return this.maxPacketAmount
      // If maxPacketAmount is present, take the lower of it or newMaxPacketAmount
      .map($ -> StreamUtils.min($, newMaxPacketAmountFinal))
      // Otherwise, just use newMaxPacketAmount
      .orElse(newMaxPacketAmount);
}
 

@Override
public JsonElement serialize(UnsignedLong src,
                             Type typeOfSrc,
                             JsonSerializationContext context) {
    return new JsonPrimitive(src.bigIntegerValue());
}