hook jsonrpc peers subcribe into current federation

server/jsonrpc_federation.go

@@ -1,10 +1,15 @@
 package server
 
 import (
+	"context"
+
+	pb "github.com/lbryio/herald.go/protobuf/go"
 	log "github.com/sirupsen/logrus"
 )
 
-type PeersService struct{}
+type PeersService struct {
+	Server *Server
+}
 
 type PeersSubscribeReq struct {
 	Ip      string   `json:"ip"`
@@ -12,13 +17,28 @@ type PeersSubscribeReq struct {
 	Details []string `json:"details"`
 }
 
-type PeersSubscribeResp struct{}
+type PeersSubscribeResp string
 
 // Features is the json rpc endpoint for 'server.peers.subcribe'.
 func (t *PeersService) Subscribe(req *PeersSubscribeReq, res **PeersSubscribeResp) error {
 	log.Println("PeersSubscribe")
+	ctx := context.Background()
+	var port = "50001"
 
-	*res = nil
+	// FIXME: Get the actual port from the request details
 
+	msg := &pb.ServerMessage{
+		Address: req.Ip,
+		Port:    port,
+	}
+
+	peers, err := t.Server.PeerSubscribe(ctx, msg)
+	if err != nil {
+		log.Println(err)
+		*res = nil
+		return err
+	}
+
+	*res = (*PeersSubscribeResp)(&peers.Value)
 	return nil
 }

server/jsonrpc_service.go

@@ -135,7 +135,7 @@ fail1:
 		}
 
 		// Register "server.peers" handlers.
-		peersSvc := &PeersService{}
+		peersSvc := &PeersService{Server: s}
 		err = s1.RegisterTCPService(peersSvc, "server_peers")
 		if err != nil {
 			log.Errorf("RegisterTCPService: %v\n", err)

server/session.go

@@ -229,7 +229,7 @@ func (sm *sessionManager) addSession(conn net.Conn) *session {
 	}
 
 	// Register "server.peers" handlers.
-	peersSvc := &PeersService{}
+	peersSvc := &PeersService{Server: sm.server}
 	err = s1.RegisterName("server.peers", peersSvc)
 	if err != nil {
 		log.Errorf("RegisterName: %v\n", err)