func NewGetAncestorReqHandler(pm p2pcommon.PeerManager, peer p2pcommon.RemotePeer, logger *log.Logger, actor p2pcommon.ActorService) *getAncestorRequestHandler {
    bh := &getAncestorRequestHandler{BaseMsgHandler{protocol: p2pcommon.GetAncestorRequest, pm: pm, peer: peer, actor: actor, logger: logger}, newAsyncHelper()}
    return bh
}