public Synchronizer(IBlockTree blockTree,
IBlockValidator blockValidator,
ISealValidator sealValidator,
IEthSyncPeerPool peerPool,
ISyncConfig syncConfig,
INodeDataDownloader nodeDataDownloader,
ILogManager logManager)
{
_logger = logManager?.GetClassLogger() ?? throw new ArgumentNullException(nameof(logManager));
_syncConfig = syncConfig ?? throw new ArgumentNullException(nameof(syncConfig));
_nodeDataDownloader = nodeDataDownloader ?? throw new ArgumentNullException(nameof(nodeDataDownloader));
_syncPeerPool = peerPool ?? throw new ArgumentNullException(nameof(peerPool));
_blockTree = blockTree ?? throw new ArgumentNullException(nameof(blockTree));
SyncProgressResolver syncProgressResolver = new SyncProgressResolver(_blockTree, _nodeDataDownloader, logManager);
_syncMode = new SyncModeSelector(syncProgressResolver, _syncPeerPool, _syncConfig, logManager);
// make ctor parameter?
_blockDownloader = new BlockDownloader(_blockTree, blockValidator, sealValidator, logManager);
}