func NewPingReqHandler(pm p2pcommon.PeerManager, peer p2pcommon.RemotePeer, logger *log.Logger, actor p2pcommon.ActorService) *pingRequestHandler {
    ph := &pingRequestHandler{BaseMsgHandler: BaseMsgHandler{protocol: p2pcommon.PingRequest, pm: pm, peer: peer, actor: actor, logger: logger}}
    return ph
}