From d45a9f550462cdff3960b0637701ecbe30e925f8 Mon Sep 17 00:00:00 2001
From: Jared Wasinger <j-wasinger@hotmail.com>
Date: Fri, 5 Dec 2025 05:00:15 -0800
Subject: [PATCH] params: validate that any defined BPOs (or cancun/prague)
 have blob schedules set

---
 params/config.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/params/config.go b/params/config.go
index 1fe7b3fd8b..60e06c647a 100644
--- a/params/config.go
+++ b/params/config.go
@@ -990,6 +990,12 @@ func (c *ChainConfig) CheckConfigForkOrder() error {
 				return fmt.Errorf("invalid chain configuration in blobSchedule for fork %q: %v", cur.name, err)
 			}
 		}
+		if cur.timestamp != nil {
+			// If cancun/prague or BPO is configured, a blob schedule must be defined
+			if cur.config == nil {
+				return fmt.Errorf("invalid chain configuration: missing entry for fork/bpo %q in blobSchedule", cur.name)
+			}
+		}
 	}
 	return nil
 }