/// <summary>
/// Connects to a node with the given ip address and adds it to the node's peer pool.
/// </summary>
/// <param name="endpoint">the ip address of the distant node</param>
/// <returns>True if the connection was successful, false otherwise</returns>
public async Task <bool> ConnectAsync(IPEndPoint endpoint)
{
Logger.LogTrace($"Attempting to reach {endpoint}.");
if (_peerPool.FindPeerByEndpoint(endpoint) != null)
{
Logger.LogWarning($"Peer {endpoint} is already in the pool.");
return(false);
}
GrpcPeer peer;
try
{
// create the connection to the distant node
peer = await _peerDialer.DialPeerAsync(endpoint);
}
catch (PeerDialException ex)
{
Logger.LogError(ex, $"Dial exception {endpoint}:");
return(false);
}
var peerPubkey = peer.Info.Pubkey;
if (!_peerPool.TryAddPeer(peer))
{
Logger.LogWarning($"Peer {peerPubkey} is already in the pool.");
await peer.DisconnectAsync(false);
return(false);
}
Handshake peerHandshake;
try
{
peerHandshake = await peer.DoHandshakeAsync(await _handshakeProvider.GetHandshakeAsync());
}
catch (NetworkException ex)
{
Logger.LogError(ex, $"Handshake failed to {endpoint} - {peerPubkey}.");
await DisconnectAsync(peer);
return(false);
}
HandshakeError handshakeError = ValidateHandshake(peerHandshake, peerPubkey);
if (handshakeError != HandshakeError.HandshakeOk)
{
Logger.LogWarning($"Invalid handshake [{handshakeError}] from {endpoint} - {peerPubkey}");
await DisconnectAsync(peer);
return(false);
}
Logger.LogTrace($"Connected to {peer} - LIB height {peer.LastKnownLibHeight}, " +
$"best chain [{peer.CurrentBlockHeight}, {peer.CurrentBlockHash}].");
FireConnectionEvent(peer);
return(true);
}
protected void OnHandshakeError(HandshakeState handshakeState, string errorMessage)
{
HandshakeError?.Invoke(this, new HandshakeErrorEventArgs(handshakeState, errorMessage));
}
