Logger is a middleware that logs the start and end of each request, along with some useful data about what was requested, what the response status was, and how long it took to return.

NewConn return new connection.

Default size of the receiving buffer, 4096 bytes.

Default length of the sending queue (size of the channel) - 64 packets.

Network connection to the node failed.

Handshake with the node was successful.

The node has different blockchain scheme.

Network connection to the node was successful.

Unknown node.

StopGracefullyAndWait stop and block until cached data sent.

StopImmediately mean stop directly, the cached data maybe will not send.