separate grpc connection

lightning.go

@@ -32,7 +32,7 @@ func newCreds(bytes []byte) rpcCreds {
 	return creds
 }
 
-func getRouterClient(hostname string, port int, tlsFile, macaroonFile string) routerrpc.RouterClient {
+func getGrpcConn(hostname string, port int, tlsFile, macaroonFile string) *grpc.ClientConn {
 	macaroonBytes, err := ioutil.ReadFile(macaroonFile)
 	if err != nil {
 		log.Println("Cannot read macaroon file .. ", err)
@@ -65,7 +65,7 @@ func getRouterClient(hostname string, port int, tlsFile, macaroonFile string) ro
 		panic(err)
 	}
 
-	return routerrpc.NewRouterClient(connection)
+	return connection
 }
 
 func pay_invoice(invoice string) (payment_status string, failure_reason string, return_err error) {
@@ -87,12 +87,14 @@ func pay_invoice(invoice string) (payment_status string, failure_reason string,
 		return
 	}
 
-	r_client := getRouterClient(
+	connection := getGrpcConn(
 		os.Getenv("LN_HOST"),
 		ln_port,
 		os.Getenv("LN_TLS_FILE"),
 		os.Getenv("LN_MACAROON_FILE"))
 
+	r_client := routerrpc.NewRouterClient(connection)
+
 	fee_limit_sat_str := os.Getenv("FEE_LIMIT_SAT")
 	fee_limit_sat, err := strconv.ParseInt(fee_limit_sat_str, 10, 64)
 	if err != nil {
@@ -127,5 +129,7 @@ func pay_invoice(invoice string) (payment_status string, failure_reason string,
 		failure_reason = lnrpc.PaymentFailureReason_name[int32(update.FailureReason)]
 	}
 
+	connection.Close()
+
 	return
 }

main.go

@@ -35,6 +35,7 @@ func lnurlp_response(w http.ResponseWriter, r *http.Request) {
 		},).Info("lnurlp_response")
 
 // look up domain in env vars (HOST_DOMAIN)
+
 	env_host_domain := os.Getenv("HOST_DOMAIN")
 	if r.Host != env_host_domain {
 		log.Warn("wrong host domain")