public async Task <NodeList> DiscoverNodesAsync()
{
Random rnd = new Random();
var peers = _peerPool.GetPeers()
.OrderBy(x => rnd.Next())
.Take(NetworkConstants.DefaultDiscoveryPeersToRequestCount)
.ToList();
var discoveredNodes = new NodeList();
foreach (var peer in peers)
{
try
{
var nodes = await peer.GetNodesAsync();
if (nodes != null && nodes.Nodes.Count > 0)
{
Logger.LogDebug($"Discovery: {peer} responded with the following nodes: {nodes}.");
var added = await _nodeManager.AddOrUpdateNodesAsync(nodes);
if (added != null)
{
discoveredNodes.Nodes.AddRange(added.Nodes);
}
}
else
{
Logger.LogDebug($"Discovery: {peer} responded with no nodes.");
}
}
catch (NetworkException ex)
{
Logger.LogError(ex, $"Error during discover - {peer}.");
}
}
if (discoveredNodes.Nodes.Count <= 0)
{
return(discoveredNodes);
}
// Check that a peer did not send us this node
var localPubKey = await _accountService.GetPublicKeyAsync();
string hexPubkey = localPubKey.ToHex();
discoveredNodes.Nodes.RemoveAll(n => n.Pubkey.ToHex().Equals(hexPubkey));
return(discoveredNodes);
}
private async Task AddNodes_Test()
{
var nodes = new NodeList
{
Nodes = { GenerateTestNodes(3).ToArray() }
};
var result = await _nodeManager.AddOrUpdateNodesAsync(nodes);
result.Nodes.Count.ShouldBe(3);
var data = nodes.ToDiagnosticString();
foreach (var node in nodes.Nodes)
{
data.ShouldContain(node.Endpoint);
}
}