/
TransactionGateway.java
80 lines (68 loc) · 2.98 KB
/
TransactionGateway.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
/*
* This file is part of RskJ
* Copyright (C) 2017 RSK Labs Ltd.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package co.rsk.net;
import co.rsk.crypto.Keccak256;
import org.ethereum.core.Transaction;
import org.ethereum.core.TransactionPool;
import org.ethereum.listener.CompositeEthereumListener;
import org.ethereum.listener.EthereumListenerAdapter;
import org.ethereum.net.server.ChannelManager;
import java.util.HashSet;
import java.util.List;
import java.util.Objects;
import java.util.Set;
/**
* Centralizes receiving and relaying transactions, so we can only distribute information to nodes that don't already
* have it.
*/
public class TransactionGateway {
private final ChannelManager channelManager;
private final CompositeEthereumListener emitter;
private final TransactionPool transactionPool;
private final TransactionNodeInformation transactionNodeInformation = new TransactionNodeInformation();
private final OnPendingTransactionsReceivedListener listener = new OnPendingTransactionsReceivedListener();
public TransactionGateway(
ChannelManager channelManager,
TransactionPool transactionPool,
CompositeEthereumListener emitter) {
this.channelManager = Objects.requireNonNull(channelManager);
this.transactionPool = Objects.requireNonNull(transactionPool);
this.emitter = Objects.requireNonNull(emitter);
}
public void start() {
emitter.addListener(listener);
}
public void stop() {
emitter.removeListener(listener);
}
public void receiveTransactionsFrom(List<Transaction> txs, NodeID nodeID) {
txs.forEach(tx -> transactionNodeInformation.addTransactionToNode(tx.getHash(), nodeID));
transactionPool.addTransactions(txs);
}
private class OnPendingTransactionsReceivedListener extends EthereumListenerAdapter {
@Override
public void onPendingTransactionsReceived(List<Transaction> txs) {
for (Transaction tx : txs) {
Keccak256 txHash = tx.getHash();
Set<NodeID> nodesToSkip = new HashSet<>(transactionNodeInformation.getNodesByTransaction(txHash));
Set<NodeID> newNodes = channelManager.broadcastTransaction(tx, nodesToSkip);
newNodes.forEach(nodeID -> transactionNodeInformation.addTransactionToNode(txHash, nodeID));
}
}
}
}