private static LnChannel GetOrCreateChannel(LndRpcClient lndClient, CoinpanicContext db, Channel c)
{
LnChannel thisChannel;
string chan_id = ""; // Temporary variable to use as the ChannelId identifier (should be unique) - used for db key
if (c.chan_id == null) // This sometimes happens for private channels.
{
chan_id = c.channel_point; // this should always exist
}
else
{
chan_id = c.chan_id; // Use value if reported
}
var chanFind = db.LnChannels.Where(ch => ch.ChannelId == chan_id);
if (chanFind.Count() < 1)
{
var chan = lndClient.GetChanInfo(chan_id);
if (chan == null)
{
var Node1 = GetOrCreateNode(lndClient, c.remote_pubkey, db);
var Node2 = GetOrCreateNode(lndClient, lndClient.GetInfo().identity_pubkey, db);
if (Node1 == null || Node2 == null)
{
// Bad node, can't find info in lnd database.
return(null);
}
// not in database
thisChannel = new LnChannel()
{
Capacity = Convert.ToInt64(chan.capacity),
ChannelId = chan_id,
ChanPoint = chan.chan_point,
Node1 = Node1,
Node2 = Node2,
};
}
else
{
var Node1 = GetOrCreateNode(lndClient, chan.node1_pub, db);
var Node2 = GetOrCreateNode(lndClient, chan.node2_pub, db);
// not in database
thisChannel = new LnChannel()
{
Capacity = Convert.ToInt64(chan.capacity),
ChannelId = chan.channel_id,
ChanPoint = chan.chan_point,
Node1 = Node1,
Node2 = Node2,
};
}
db.SaveChanges();
}
else
{
thisChannel = chanFind.First();
}
return(thisChannel);
}
public ActionResult NodeChannels()
{
if (DateTime.Now - LastNodeChannelsUpdate > StatusCacheTimeout)
{
Guid taskid = Guid.NewGuid();
UpdateTask updateTask = new UpdateTask()
{
id = taskid,
task = new Task(() =>
{
try
{
bool useTestnet = GetUseTestnet();
LndRpcClient lndClient = GetLndClient(useTestnet);
string pubkey = nodeURIViewModel.Node_Pubkey;
if (pubkey == "") // If not already known
{
var info = lndClient.GetInfo();
pubkey = info.identity_pubkey;
nodeURIViewModel.URI = info.uris.First();
nodeURIViewModel.Alias = info.alias;
nodeURIViewModel.Node_Pubkey = info.identity_pubkey;
}
var channels = lndClient.GetChannels();
nodeChannelViewModel.channels = new List <LnChannelInfoModel>(); // Clear cache
using (CoinpanicContext db = new CoinpanicContext())
{
LnNode myNode = GetOrCreateNode(lndClient, nodeURIViewModel.Node_Pubkey, db);
//Check each channel
foreach (var c in channels.channels)
{
LnChannelInfoModel channelViewModel = new LnChannelInfoModel();
// Check if this is a new channel
if (myNode.Channels.Where(ch => ch.ChannelId == c.chan_id).Count() < 1)
{
try
{
LnChannel thisChannel = GetOrCreateChannel(lndClient, db, c);
if (thisChannel != null && !myNode.Channels.Contains(thisChannel))
{
myNode.Channels.Add(thisChannel);
db.SaveChanges();
}
}
catch (Exception e)
{
// TODO - manage errors reading channels
LnChannel thisChannel = null;
}
}
// Check if there is a history for the channel
//List<LnChannelConnectionPoints> chanHist = GetChanHist(lndClient, db, c);
DateTime cutoff = DateTime.UtcNow - TimeSpan.FromDays(30);
Int64 otherchanid = Convert.ToInt64(c.chan_id);
channelViewModel.History = db.LnChannelHistory
.Where(ch => ch.ChanId == otherchanid)
.Where(ch => ch.Timestamp > cutoff)
.OrderByDescending(ch => ch.Timestamp)
.Include("RemoteNode")
.Take(30)
.AsNoTracking()
.ToList();
LnChannelConnectionPoints prevChanHist;
if (channelViewModel.History.Count() > 0)
{
prevChanHist = channelViewModel.History.First();
}
else
{
prevChanHist = new LnChannelConnectionPoints()
{
Timestamp = DateTime.UtcNow,
};
}
// check for changes
if (prevChanHist.IsConnected != c.active ||
prevChanHist.LocalBalance != Convert.ToInt64(c.local_balance) ||
prevChanHist.RemoteBalance != Convert.ToInt64(c.remote_balance) ||
DateTime.UtcNow - prevChanHist.Timestamp > TimeSpan.FromHours(6))
{
// update
LnNode remoteNode = GetOrCreateNode(lndClient, c.remote_pubkey, db);
LnChannelConnectionPoints newChanHist = new LnChannelConnectionPoints()
{
IsConnected = c.active,
LocalBalance = Convert.ToInt64(c.local_balance),
RemoteBalance = Convert.ToInt64(c.remote_balance),
Timestamp = DateTime.UtcNow,
RemoteNode = remoteNode,
ChanId = Convert.ToInt64(c.chan_id),
};
prevChanHist.RemoteNode = remoteNode;
db.LnChannelHistory.Add(newChanHist);
db.SaveChanges();
}
if (c.remote_balance is null)
{
c.remote_balance = "0";
}
if (c.local_balance is null)
{
c.local_balance = "0";
}
channelViewModel.ChanInfo = c;
channelViewModel.RemoteNode = prevChanHist.RemoteNode;
nodeChannelViewModel.channels.Add(channelViewModel);
}
}
// Updates to channelinfo
nodeSummaryViewModel.NumChannels = channels.channels.Count;
nodeSummaryViewModel.Capacity = Convert.ToDouble(channels.channels.Sum(c => Convert.ToInt64(c.capacity))) / 100000000.0;
nodeSummaryViewModel.LocalCapacity = Convert.ToDouble(channels.channels.Sum(n => Convert.ToInt64(n.local_balance))) / 100000000.0;
nodeSummaryViewModel.RemoteCapacity = Convert.ToDouble(channels.channels.Sum(n => Convert.ToInt64(n.remote_balance))) / 100000000.0;
nodeSummaryViewModel.ActiveCapacity = Convert.ToDouble(channels.channels.Where(c => c.active).Sum(c => Convert.ToInt64(c.capacity))) / 100000000.0;
nodeSummaryViewModel.ActiveLocalCapacity = Convert.ToDouble(channels.channels.Where(c => c.active).Sum(n => Convert.ToInt64(n.local_balance))) / 100000000.0;
nodeSummaryViewModel.ActiveRemoteCapacity = Convert.ToDouble(channels.channels.Where(c => c.active).Sum(n => Convert.ToInt64(n.remote_balance))) / 100000000.0;
UpdateTaskComplete(taskid);
}
catch (Exception e)
{
// Try again on next refresh
LastNodeChannelsUpdate = DateTime.Now - StatusCacheTimeout;
}
}),
};
updateTasks.TryAdd(taskid, updateTask);
updateTask.task.Start();
LastNodeChannelsUpdate = DateTime.Now;
}
return(PartialView("NodeChannels", nodeChannelViewModel));
}
