From c55a12197e0495a0c5d3e5f049cdffd4e696aece Mon Sep 17 00:00:00 2001
From: Klimov Sergei <klmff@proton.me>
Date: Wed, 26 Nov 2025 23:19:33 +0800
Subject: [PATCH] beacon/config: ignore nil values in config file (#33065)

YAML supports leaving out the value, so we should handle this condition
in our limited parser.
---
 beacon/params/config.go      | 3 +++
 beacon/params/config_test.go | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/beacon/params/config.go b/beacon/params/config.go
index 5336220efd..437aa53788 100644
--- a/beacon/params/config.go
+++ b/beacon/params/config.go
@@ -103,6 +103,9 @@ func (c *ChainConfig) LoadForks(file []byte) error {
 	epochs["GENESIS"] = 0
 
 	for key, value := range config {
+		if value == nil {
+			continue
+		}
 		if strings.HasSuffix(key, "_FORK_VERSION") {
 			name := key[:len(key)-len("_FORK_VERSION")]
 			switch version := value.(type) {
diff --git a/beacon/params/config_test.go b/beacon/params/config_test.go
index 41e120469b..0b569b604c 100644
--- a/beacon/params/config_test.go
+++ b/beacon/params/config_test.go
@@ -15,6 +15,9 @@ ALTAIR_FORK_EPOCH: 1
 EIP7928_FORK_VERSION: 0xb0000038
 EIP7928_FORK_EPOCH: 18446744073709551615
 
+EIP7XXX_FORK_VERSION: 
+EIP7XXX_FORK_EPOCH: 
+
 BLOB_SCHEDULE: []
 `
 	c := &ChainConfig{}