public NetworkNode Decode(RlpStream rlpStream, RlpBehaviors rlpBehaviors = RlpBehaviors.None)
{
rlpStream.ReadSequenceLength();
PublicKey publicKey = new PublicKey(rlpStream.DecodeByteArray());
string ip = rlpStream.DecodeString();
int port = (int)rlpStream.DecodeByteArraySpan().ReadEthUInt64();
rlpStream.SkipItem();
long reputation = 0L;
try
{
reputation = rlpStream.DecodeLong();
}
catch (RlpException)
{
// regression - old format
}
NetworkNode networkNode = new NetworkNode(publicKey, ip != string.Empty ? ip : null, port, reputation);
return(networkNode);
}
private static StatusMessage Deserialize(RlpStream rlpStream)
{
StatusMessage statusMessage = new StatusMessage();
(int prefixLength, int contentLength) = rlpStream.PeekPrefixAndContentLength();
var totalLength = contentLength;
rlpStream.Position += prefixLength;
var readLength = prefixLength;
while (totalLength > readLength)
{
(prefixLength, contentLength) = rlpStream.PeekPrefixAndContentLength();
readLength += prefixLength + contentLength;
rlpStream.Position += prefixLength;
string key = rlpStream.DecodeString();
switch (key)
{
case StatusMessage.KeyNames.ProtocolVersion:
statusMessage.ProtocolVersion = rlpStream.DecodeByte();
break;
case StatusMessage.KeyNames.ChainId:
statusMessage.ChainId = rlpStream.DecodeUInt256();
break;
case StatusMessage.KeyNames.TotalDifficulty:
statusMessage.TotalDifficulty = rlpStream.DecodeUInt256();
break;
case StatusMessage.KeyNames.BestHash:
statusMessage.BestHash = rlpStream.DecodeKeccak();
break;
case StatusMessage.KeyNames.HeadBlockNo:
statusMessage.HeadBlockNo = rlpStream.DecodeLong();
break;
case StatusMessage.KeyNames.GenesisHash:
statusMessage.GenesisHash = rlpStream.DecodeKeccak();
break;
case StatusMessage.KeyNames.AnnounceType:
statusMessage.AnnounceType = rlpStream.DecodeByte();
break;
case StatusMessage.KeyNames.ServeHeaders:
statusMessage.ServeHeaders = true;
rlpStream.SkipItem();
break;
case StatusMessage.KeyNames.ServeChainSince:
statusMessage.ServeChainSince = rlpStream.DecodeLong();
break;
case StatusMessage.KeyNames.ServeRecentChain:
statusMessage.ServeRecentChain = rlpStream.DecodeLong();
break;
case StatusMessage.KeyNames.ServeStateSince:
statusMessage.ServeStateSince = rlpStream.DecodeLong();
break;
case StatusMessage.KeyNames.ServeRecentState:
statusMessage.ServeRecentState = rlpStream.DecodeLong();
break;
case StatusMessage.KeyNames.TxRelay:
statusMessage.TxRelay = true;
rlpStream.SkipItem();
break;
case StatusMessage.KeyNames.BufferLimit:
statusMessage.BufferLimit = rlpStream.DecodeInt();
break;
case StatusMessage.KeyNames.MaximumRechargeRate:
statusMessage.MaximumRechargeRate = rlpStream.DecodeInt();
break;
case StatusMessage.KeyNames.MaximumRequestCosts:
// todo
default:
// Ignore unknown keys
rlpStream.Position = readLength;
break;
}
}
return(statusMessage);
}
/// <summary>
/// Deserializes a <see cref="NodeRecord"/> from an <see cref="RlpStream"/>.
/// </summary>
/// <param name="rlpStream">A stream to read the serialized data from.</param>
/// <returns>A deserialized <see cref="NodeRecord"/></returns>
public NodeRecord Deserialize(RlpStream rlpStream)
{
int startPosition = rlpStream.Position;
int recordRlpLength = rlpStream.ReadSequenceLength();
NodeRecord nodeRecord = new();
ReadOnlySpan <byte> sigBytes = rlpStream.DecodeByteArraySpan();
Signature signature = new(sigBytes, 0);
bool canVerify = true;
long enrSequence = rlpStream.DecodeLong();
while (rlpStream.Position < startPosition + recordRlpLength)
{
string key = rlpStream.DecodeString();
switch (key)
{
case EnrContentKey.Eth:
_ = rlpStream.ReadSequenceLength();
_ = rlpStream.ReadSequenceLength();
byte[] forkHash = rlpStream.DecodeByteArray();
long nextBlock = rlpStream.DecodeLong();
nodeRecord.SetEntry(new EthEntry(forkHash, nextBlock));
break;
case EnrContentKey.Id:
rlpStream.SkipItem();
nodeRecord.SetEntry(IdEntry.Instance);
break;
case EnrContentKey.Ip:
ReadOnlySpan <byte> ipBytes = rlpStream.DecodeByteArraySpan();
IPAddress address = new(ipBytes);
nodeRecord.SetEntry(new IpEntry(address));
break;
case EnrContentKey.Tcp:
int tcpPort = rlpStream.DecodeInt();
nodeRecord.SetEntry(new TcpEntry(tcpPort));
break;
case EnrContentKey.Udp:
int udpPort = rlpStream.DecodeInt();
nodeRecord.SetEntry(new UdpEntry(udpPort));
break;
case EnrContentKey.Secp256K1:
ReadOnlySpan <byte> keyBytes = rlpStream.DecodeByteArraySpan();
CompressedPublicKey reportedKey = new(keyBytes);
nodeRecord.SetEntry(new Secp256K1Entry(reportedKey));
break;
// snap
default:
canVerify = false;
rlpStream.SkipItem();
nodeRecord.Snap = true;
break;
}
}
if (!canVerify)
{
rlpStream.Position = startPosition;
rlpStream.ReadSequenceLength();
rlpStream.SkipItem(); // signature
int noSigContentLength = rlpStream.Length - rlpStream.Position;
int noSigSequenceLength = Rlp.LengthOfSequence(noSigContentLength);
byte[] originalContent = new byte[noSigSequenceLength];
RlpStream originalContentStream = new (originalContent);
originalContentStream.StartSequence(noSigContentLength);
originalContentStream.Write(rlpStream.Read(noSigContentLength));
rlpStream.Position = startPosition;
nodeRecord.OriginalContentRlp = originalContentStream.Data !;
}
nodeRecord.EnrSequence = enrSequence;
nodeRecord.Signature = signature;
return(nodeRecord);
}
