From c774d089f93e1cb4893871a1d9ee0a4001feadfd Mon Sep 17 00:00:00 2001
From: Aurora Gaffney <aurora@blinklabs.io>
Date: Wed, 30 Oct 2024 10:31:05 -0500
Subject: [PATCH] fix: protect against panic when updating pparams from Conway
 genesis

---
 ledger/conway/pparams.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/ledger/conway/pparams.go b/ledger/conway/pparams.go
index fca11b66..822ac8cf 100644
--- a/ledger/conway/pparams.go
+++ b/ledger/conway/pparams.go
@@ -226,6 +226,9 @@ func (p *ConwayProtocolParameters) UpdateFromGenesis(genesis *ConwayGenesis) {
 		}
 	}
 	if len(genesis.PlutusV3CostModel) > 0 {
+		if p.CostModels == nil {
+			p.CostModels = make(map[uint][]int64)
+		}
 		p.CostModels[2] = genesis.PlutusV3CostModel
 	}
 	if genesis.PoolVotingThresholds.MotionNoConfidence != nil {