/**
* Process a version message
*
* <p>This method is called when a 'version' message is received. The application should return a
* 'verack' message to the sender if the connection is accepted.
*
* @param msg Message
* @param localAddress Local address as seen by the peer
*/
@Override
public void processVersion(Message msg, PeerAddress localAddress) {
Peer peer = msg.getPeer();
//
// Disconnect the peer if it doesn't provide node services. Otherwise, increment
// the version handshake stage.
//
if ((peer.getServices() & NetParams.NODE_NETWORK) == 0) {
peer.setDisconnect(true);
log.info(String.format("Connection rejected from %s", peer.getAddress().toString()));
} else {
peer.incVersionCount();
Message ackMsg = VersionAckMessage.buildVersionAckMessage(peer);
Parameters.networkHandler.sendMessage(ackMsg);
log.info(
String.format(
"Peer %s: Protocol level %d, Services %d, Agent %s, Height %d",
peer.getAddress().toString(),
peer.getVersion(),
peer.getServices(),
peer.getUserAgent(),
peer.getHeight()));
}
}
/**
* Handle an inventory request
*
* <p>This method is called when a 'getdata' message is received. The application should send the
* inventory items to the requesting peer. A 'notfound' message should be returned to the
* requesting peer if one or more items cannot be sent.
*
* @param msg Message
* @param invList Inventory item list
*/
@Override
public void sendInventory(Message msg, List<InventoryItem> invList) {
Peer peer = msg.getPeer();
List<InventoryItem> notFoundList = new ArrayList<>(invList.size());
//
// Process the inventory list and request new transactions
//
invList
.stream()
.forEach(
(item) -> {
switch (item.getType()) {
case InventoryItem.INV_TX:
try {
SendTransaction sendTx = Parameters.wallet.getSendTx(item.getHash());
if (sendTx != null) {
Message txMsg =
TransactionMessage.buildTransactionMessage(peer, sendTx.getTxData());
Parameters.networkHandler.sendMessage(txMsg);
log.info(
String.format(
"Transaction sent to peer %s\n Tx %s",
peer.getAddress().toString(), item.getHash().toString()));
} else {
log.debug(
String.format(
"Requested transaction not found\n Tx %s",
item.getHash().toString()));
notFoundList.add(item);
}
} catch (WalletException exc) {
log.error("Unable to retrieve wallet transaction", exc);
notFoundList.add(item);
}
break;
default:
notFoundList.add(item);
}
});
//
// Send a 'notfound' message if we couldn't process all of the requests
//
if (!notFoundList.isEmpty()) {
Message invMsg = NotFoundMessage.buildNotFoundMessage(peer, notFoundList);
Parameters.networkHandler.sendMessage(invMsg);
}
}
/**
* Process a pong
*
* <p>This method is called when a 'pong' message is received.
*
* @param msg Message
* @param nonce Nonce
*/
@Override
public void processPong(Message msg, long nonce) {
Peer peer = msg.getPeer();
peer.setPing(false);
log.info(String.format("'pong' response received from %s", peer.getAddress().toString()));
}