From b4d602e83430e463208bc6d6e8d2cb3b04e527a9 Mon Sep 17 00:00:00 2001
From: vividctrlalt <vividctrlalt@users.noreply.github.com>
Date: Wed, 1 Apr 2026 08:19:27 +0000
Subject: [PATCH] fix(config): replace external.ip=null with empty string

HOCON null values cannot be bound by ConfigBeanFactory to String fields.
Use empty string instead, which has the same effect (triggers the
automatic IP detection fallback in java-tron).

Related: tronprotocol/java-tron#6615
---
 testcase/src/test/resources/config-localtest.conf     | 2 +-
 testcase/src/test/resources/config-test-dbbackup.conf | 2 +-
 testcase/src/test/resources/config-test-index.conf    | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/testcase/src/test/resources/config-localtest.conf b/testcase/src/test/resources/config-localtest.conf
index 22a41d22..222a9d17 100644
--- a/testcase/src/test/resources/config-localtest.conf
+++ b/testcase/src/test/resources/config-localtest.conf
@@ -59,7 +59,7 @@ node.discovery = {
   enable = true
   persist = true
   bind.ip = ""
-  external.ip = null
+  external.ip = ""
 }
 
 node.backup {
diff --git a/testcase/src/test/resources/config-test-dbbackup.conf b/testcase/src/test/resources/config-test-dbbackup.conf
index b39cb54d..830e1184 100644
--- a/testcase/src/test/resources/config-test-dbbackup.conf
+++ b/testcase/src/test/resources/config-test-dbbackup.conf
@@ -62,7 +62,7 @@ node.discovery = {
   enable = true
   persist = true
   bind.ip = ""
-  external.ip = null
+  external.ip = ""
 }
 
 node.backup {
diff --git a/testcase/src/test/resources/config-test-index.conf b/testcase/src/test/resources/config-test-index.conf
index d2feabff..d28f2640 100644
--- a/testcase/src/test/resources/config-test-index.conf
+++ b/testcase/src/test/resources/config-test-index.conf
@@ -55,7 +55,7 @@ node.discovery = {
   enable = true
   persist = true
   bind.ip = ""
-  external.ip = null
+  external.ip = ""
 }
 
 node {