public async Task Handle(VersionMessage message, IPeer sender)
{
if (_server.Nonce != message.Payload.Nonce)
{
throw new InvalidOperationException("The handshake failed.");
}
if (_server.Version > message.Payload.Version)
{
_logger.LogWarning("Downgraded to lower protocol version.");
sender.DowngradeProtocol(message.Payload.Version);
}
await sender.Send <VerAckMessage>();
}
public async Task Handle(VersionMessage message, IPeer sender)
{
sender.Version = message.Payload;
if (_server.Nonce == sender.Version.Nonce)
{
throw new InvalidOperationException($"The handshake is failed due to \"{nameof(_server.Nonce)}\" value equality.");
}
if (_server.ProtocolVersion > sender.Version.Version)
{
_logger.LogWarning("Downgraded to a lower protocol version.");
sender.DowngradeProtocol(sender.Version.Version);
}
await sender.Send <VerAckMessage>();
}