private static async Task TryAddPeer(IPEndPoint ip)
{
try
{
await Node.AddPeer(ip);
}
catch (Exception ex)
{
Console.WriteLine($"Failed to connect to peer {ip} ({ex.Message})");
//remove this peer if it cant be reached [sorry :(]
var ph = ip.AsHash();
if (BlockChain.Peers.ContainsKey(ph))
{
BlockChain.Peers.Remove(ph);
}
}
}
private static async Task RunNode()
{
try
{
BlockChain.Init();
var cp_btc = new ChainParams();
Node = new BitcoinNode <BitcoinNodePeer>(cp_btc, new IPEndPoint(IPAddress.Any, 8336));
Node.OnLog += Node_OnLog;
Node.Start();
//var ct = node.AddPeer(new IPEndPoint(IPAddress.Parse("192.168.254.6"), 8333));
//var ct2 = node.AddPeer(new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8333));
//if no peers, add seeds
if (BlockChain.Peers.Count == 0)
{
Console.WriteLine("No peers found, adding seed nodes..");
foreach (var seed in DNSSeeds)
{
try
{
var ips = await Dns.GetHostAddressesAsync(seed);
foreach (var ip in ips)
{
var ep = new IPEndPoint(ip, 8333);
BlockChain.Peers.Add(ep.AsHash(), new PeerInfo()
{
Ip = ep,
LastSeen = DateTime.Now,
LastVersion = new bitcoin_lib.P2P.Version()
});
}
}
catch (Exception ex)
{
Console.WriteLine($"No ips found for seed: {seed} ({ex.Message})");
}
}
}
//connect to last 8 peers
await TryAddLastPeers();
bool exit = false;
Console.CancelKeyPress += (s, e) =>
{
Console.WriteLine($"Shutting down..");
exit = true;
//doesnt work in .net core it seems..
//https://github.com/dotnet/coreclr/issues/8565
};
while (!exit)
{
//ping the peers every 60s
if ((DateTime.Now - LastPingSent).TotalSeconds >= 60)
{
//disconnect a high ping node
BitcoinNodePeer hpn = Node.EnumeratePeers().Where(a => a.LastPing != TimeSpan.Zero).OrderByDescending(a => a.LastPing.TotalMilliseconds).FirstOrDefault();
if (hpn != default)
{
hpn.Disconnect();
}
var pt = new List <Task>();
foreach (var n in Node.EnumeratePeers())
{
pt.Add(n.StartPing());
}
await Task.WhenAll(pt);
LastPingSent = DateTime.Now;
}
//try to get 8 peers
if (Node.EnumeratePeers().Count() < 8)
{
//ask for more peers if we dont have enough
if (BlockChain.Peers.Count < 100)
{
Console.WriteLine($"Not enough known peers, asking for more..");
foreach (var n in Node.EnumeratePeers())
{
var addr = new GetAddr();
await n.WriteMessage(addr);
}
//wait 2s for nodes to reply
await Task.Delay(2000);
}
await TryAddLastPeers();
}
await Task.Delay(100);
}
await ShutdownNode();
}
catch (Exception ex)
{
Console.WriteLine(ex);
}
}
