New create a new Communicator instance.

Communicator communicates with remote p2p peers to exchange blocks and txs, etc.

NewBlockEvent event emitted when received block announcement.

Peer extends p2p.Peer with RPC integrated.

PeerSet manages a set of peers, which mapped by NodeID.

PeerStats records stats of a peer.

HandleBlockStream to handle the stream of downloaded blocks in sync process.

Peers slice of peers.