package org.ethereum.net.eth;
import static org.ethereum.net.eth.EthMessageCodes.TRANSACTIONS;
import org.ethereum.core.Transaction;
import org.ethereum.net.eth.EthMessage;
import org.ethereum.util.RLP;
import org.ethereum.util.RLPList;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
/**
* Wrapper around an Ethereum Transactions message on the network
*
* @see org.ethereum.net.eth.EthMessageCodes#TRANSACTIONS
*/
public class TransactionsMessage extends EthMessage {
private Set<Transaction> transactions;
public TransactionsMessage(byte[] encoded) {
super(encoded);
}
public TransactionsMessage(Transaction transaction) {
transactions = new HashSet<Transaction>();
transactions.add(transaction);
parsed = true;
}
public TransactionsMessage(Set<Transaction> transactionList) {
this.transactions = transactionList;
parsed = true;
}
private void parse() {
RLPList paramsList = (RLPList) RLP.decode2(encoded).get(0);
transactions = new HashSet<>();
for (int i = 1; i < paramsList.size(); ++i) {
RLPList rlpTxData = (RLPList) paramsList.get(i);
Transaction tx = new Transaction(rlpTxData.getRLPData());
transactions.add(tx);
}
parsed = true;
}
private void encode() {
List<byte[]> encodedElements = new ArrayList<>();
encodedElements.add(RLP.encodeByte(TRANSACTIONS.asByte()));
for (Transaction tx : transactions)
encodedElements.add(tx.getEncoded());
byte[][] encodedElementArray = encodedElements
.toArray(new byte[encodedElements.size()][]);
this.encoded = RLP.encodeList(encodedElementArray);
}
@Override
public byte[] getEncoded() {
if (encoded == null) encode();
return encoded;
}
public Set<Transaction> getTransactions() {
if (!parsed) parse();
return transactions;
}
@Override
public EthMessageCodes getCommand(){
return EthMessageCodes.TRANSACTIONS;
}
@Override
public Class<?> getAnswerMessage() {
return null;
}
public String toString() {
if(!parsed) parse();
StringBuffer sb = new StringBuffer();
for (Transaction transaction : transactions)
sb.append("\n ").append(transaction);
return "[" + this.getCommand().name() + " num:"
+ transactions.size() + " " + sb.toString() + "]";
}
}