server: grpc listens over SSL

server/server.go

@@ -94,7 +94,9 @@ func New(cfg Config) (*Server, error) {
 	proto.RegisterRoutesServer(gs, &Route{Server: s})
 	proto.RegisterTokensServer(gs, &Token{Server: s})
 
-	l, err := net.Listen("tcp", cfg.GRPCAddr)
+	l, err := tls.Listen("tcp", cfg.GRPCAddr, &tls.Config{
+		GetCertificate: m.GetCertificate,
+	})
 	if err != nil {
 		return nil, err
 	}