From a96f4dd3d930c9320564f6b7e6001a9a6bd194e1 Mon Sep 17 00:00:00 2001
From: Martin Kourim <martin.kourim@iohk.io>
Date: Tue, 18 Aug 2026 17:11:20 +0200
Subject: [PATCH] feat(scripts): gate genesis extraConfig downgrade behind env
 var

Downgrade only runs when GENESIS_DOWNGRADE is set, instead of always
attempting it based on node support detection.
---
 src/cardonnay_scripts/scripts/common/common-start-fast | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/cardonnay_scripts/scripts/common/common-start-fast b/src/cardonnay_scripts/scripts/common/common-start-fast
index 990816b..4bfb9a6 100644
--- a/src/cardonnay_scripts/scripts/common/common-start-fast
+++ b/src/cardonnay_scripts/scripts/common/common-start-fast
@@ -257,7 +257,9 @@ create_genesis() {
     | .maxLovelaceSupply = $max_supply
     ' "${STATE_CLUSTER}/create_staked/genesis.json" > "${STATE_CLUSTER}/shelley/genesis.json"
 
-  downgrade_genesis_injection "${STATE_CLUSTER}/shelley/genesis.json"
+  if is_truthy "${GENESIS_DOWNGRADE:-}"; then
+    downgrade_genesis_injection "${STATE_CLUSTER}/shelley/genesis.json"
+  fi
   rm -f "${STATE_CLUSTER}/create_staked/genesis.json"
 
   mv "$STATE_CLUSTER"/create_staked/genesis*.json "${STATE_CLUSTER}/shelley/"