feat: Implement peer empty connection

proto/launch/genesis_validator.proto

@@ -21,10 +21,13 @@ message Peer {
   oneof connection {
     string tcpAddress = 2;  // use a TCP address
     HTTPTunnel httpTunnel = 3; // or use an HTTP tunnel
+    EmptyConnection none = 4; // or don't provide any connection
   }
 
   message HTTPTunnel {
     string name = 1;  // e.g.: chisel (https://github.com/jpillora/chisel)
     string address = 2;  // for chisel running on Gitpod, e.g.: https://3475-chocolate-capybara-kkiztq32.ws-eu21.gitpod.io/
   }
-}
+
+  message EmptyConnection {}
+}

x/launch/types/peer.go

@@ -25,6 +25,10 @@ func NewPeerConn(id, address string) Peer {
 	}
 }
 
+func NewPeerEmpty(id string) Peer {
+	return Peer{Id: id, Connection: &Peer_None{None: &Peer_EmptyConnection{}}}
+}
+
 // Validate check the Peer object
 func (m Peer) Validate() error {
 	if m.Id == "" {
@@ -42,6 +46,8 @@ func (m Peer) Validate() error {
 		if conn.HttpTunnel.Address == "" {
 			return errors.New("empty http tunnel peer address")
 		}
+	case *Peer_None:
+		return nil
 	default:
 		return errors.New("invalid peer connection")
 	}

x/launch/types/peer_test.go

@@ -25,6 +25,11 @@ func TestPeer_Validate(t *testing.T) {
 			peer:    types.NewPeerTunnel(sample.String(r, 3), sample.String(r, 5), sample.String(r, 10)),
 			wantErr: false,
 		},
+		{
+			name:    "validate new peer empty",
+			peer:    types.NewPeerEmpty(sample.String(r, 3)),
+			wantErr: false,
+		},
 		{
 			name:    "invalid peer",
 			peer:    types.Peer{},