hello: Move from f2

node/modules/core.go

@@ -1,10 +1,13 @@
 package modules
 
 import (
+	logging "github.com/ipfs/go-log"
 	"github.com/libp2p/go-libp2p-core/peerstore"
 	record "github.com/libp2p/go-libp2p-record"
 )
 
+var log = logging.Logger("modules")
+
 // RecordValidator provides namesys compatible routing record validator
 func RecordValidator(ps peerstore.Peerstore) record.Validator {
 	return record.NamespacedValidator{

node/modules/hello.go

@@ -0,0 +1,25 @@
+package modules
+
+import (
+	"github.com/filecoin-project/go-lotus/node/hello"
+	"github.com/filecoin-project/go-lotus/node/modules/helpers"
+	"github.com/libp2p/go-libp2p-core/host"
+	inet "github.com/libp2p/go-libp2p-core/network"
+	"go.uber.org/fx"
+)
+
+func HandleHello(mctx helpers.MetricsCtx, lc fx.Lifecycle, h host.Host, svc *hello.Service) error {
+	h.SetStreamHandler(hello.ProtocolID, svc.HandleStream)
+
+	bundle := inet.NotifyBundle{
+		ConnectedF: func(_ inet.Network, c inet.Conn) {
+			go func() {
+				if err := svc.SayHello(helpers.LifecycleCtx(mctx, lc), c.RemotePeer()); err != nil {
+					log.Warnw("failed to say hello", "error", err)
+					return
+				}
+			}()
+		},
+	}
+	h.Network().Notify(&bundle)
+}