hello: Move from f2

node/hello/hello.go

@@ -0,0 +1,99 @@
+package hello
+
+import (
+	"bufio"
+	"context"
+	"github.com/filecoin-project/go-lotus/cborrpc"
+	"github.com/libp2p/go-libp2p-core/host"
+
+	"github.com/ipfs/go-cid"
+	cbor "github.com/ipfs/go-ipld-cbor"
+	logging "github.com/ipfs/go-log"
+	inet "github.com/libp2p/go-libp2p-core/network"
+	"github.com/libp2p/go-libp2p-core/peer"
+	"github.com/libp2p/go-libp2p-core/protocol"
+)
+
+const ProtocolID = "/fil/hello/1.0.0"
+var log = logging.Logger("hello")
+
+func init() {
+	cbor.RegisterCborType(Message{})
+}
+
+type Message struct {
+	HeaviestTipSet       []cid.Cid
+	HeaviestTipSetWeight uint64
+	GenesisHash          cid.Cid
+}
+
+type NewStreamFunc func(context.Context, peer.ID, ...protocol.ID) (inet.Stream, error)
+
+type Service struct {
+	newStream NewStreamFunc
+
+	//cs        *ChainStore
+	//syncer    *Syncer
+}
+
+func NewHelloService(h host.Host) *Service {
+	return &Service{
+		newStream: h.NewStream,
+	}
+}
+
+func (hs *Service) HandleStream(s inet.Stream) {
+	defer s.Close()
+
+	log.Debugw("Handling hello")
+
+	var hmsg Message
+	if err := cborrpc.ReadCborRPC(bufio.NewReader(s), &hmsg); err != nil {
+		log.Error("failed to read hello message: ", err)
+		return
+	}
+	log.Debugw("heaviest tipset", "tipset", hmsg.HeaviestTipSet)
+	log.Debugw("got genesis from hello", "hash", hmsg.GenesisHash)
+
+	/*if hmsg.GenesisHash != hs.syncer.genesis.Cids()[0] {
+		log.Error("other peer has different genesis!")
+		s.Conn().Close()
+		return
+	}
+
+	ts, err := hs.syncer.FetchTipSet(context.Background(), s.Conn().RemotePeer(), hmsg.HeaviestTipSet)
+	if err != nil {
+		log.Errorf("failed to fetch tipset from peer during hello: %s", err)
+		return
+	}
+
+	hs.syncer.InformNewHead(s.Conn().RemotePeer(), ts)*/
+}
+
+func (hs *Service) SayHello(ctx context.Context, pid peer.ID) error {
+	/*s, err := hs.newStream(ctx, pid, ProtocolID)
+	if err != nil {
+		return err
+	}
+
+	hts := hs.cs.GetHeaviestTipSet()
+	weight := hs.cs.Weight(hts)
+	gen, err := hs.cs.GetGenesis()
+	if err != nil {
+		return err
+	}
+
+	hmsg := &Message{
+		HeaviestTipSet:       hts.Cids(),
+		HeaviestTipSetWeight: weight,
+		GenesisHash:          gen.Cid(),
+	}
+	fmt.Println("SENDING HELLO MESSAGE: ", hts.Cids())
+	fmt.Println("hello message genesis: ", gen.Cid())
+
+	if err := WriteCborRPC(s, hmsg); err != nil {
+		return err
+	}*/
+
+	return nil
+}