/**
* Build a 'getblocks' message
*
* @param peer Destination peer
* @param blockList Block hash list
* @param stopBlock Stop block hash (Sha256Hash.ZERO_HASH to get all blocks)
* @return 'getblocks' message
*/
public static Message buildGetBlocksMessage(
Peer peer, List<Sha256Hash> blockList, Sha256Hash stopBlock) {
//
// Build the message payload
//
// The protocol version will be set to the lesser of our version and the peer version
//
SerializedBuffer msgBuffer = new SerializedBuffer(blockList.size() * 32 + 40);
msgBuffer
.putInt(Math.min(peer.getVersion(), NetParams.PROTOCOL_VERSION))
.putVarInt(blockList.size());
for (Sha256Hash hash : blockList) {
msgBuffer.putBytes(Helper.reverseBytes(hash.getBytes()));
}
msgBuffer.putBytes(Helper.reverseBytes(stopBlock.getBytes()));
//
// Build the message
//
ByteBuffer buffer = MessageHeader.buildMessage("getblocks", msgBuffer);
return new Message(buffer, peer, MessageHeader.MessageCommand.GETBLOCKS);
}
/**
* Serialize the transaction
*
* @param outBuffer Output buffer
* @return Output buffer
*/
@Override
public final SerializedBuffer getBytes(SerializedBuffer outBuffer) {
if (txData != null) {
outBuffer.putBytes(txData);
} else {
outBuffer
.putInt(txVersion)
.putVarInt(txInputs.size())
.putBytes(txInputs)
.putVarInt(txOutputs.size())
.putBytes(txOutputs)
.putUnsignedInt(txLockTime);
}
return outBuffer;
}
