From 240904b39c5198e657e54138205615087db9a4cc Mon Sep 17 00:00:00 2001
From: beer-1 <147697694+beer-1@users.noreply.github.com>
Date: Wed, 6 Nov 2024 12:39:14 +0900
Subject: [PATCH] handle upgrade empty params (#101)

---
 app/upgrade.go         | 2 +-
 x/evm/keeper/params.go | 2 ++
 2 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/upgrade.go b/app/upgrade.go
index fbc11ac..688214c 100644
--- a/app/upgrade.go
+++ b/app/upgrade.go
@@ -10,7 +10,7 @@ import (
 	"github.com/cosmos/cosmos-sdk/types/module"
 )
 
-const upgradeName = "0.6.0"
+const upgradeName = "0.6.3"
 
 // RegisterUpgradeHandlers returns upgrade handlers
 func (app *MinitiaApp) RegisterUpgradeHandlers(cfg module.Configurator) {
diff --git a/x/evm/keeper/params.go b/x/evm/keeper/params.go
index 1d2044d..ffbda9a 100644
--- a/x/evm/keeper/params.go
+++ b/x/evm/keeper/params.go
@@ -19,6 +19,8 @@ func (k Keeper) GasRefundRatio(ctx context.Context) (math.LegacyDec, error) {
 	params, err := k.Params.Get(ctx)
 	if err != nil {
 		return math.LegacyZeroDec(), err
+	} else if params.GasRefundRatio.IsNil() {
+		return math.LegacyZeroDec(), nil
 	}
 
 	return params.GasRefundRatio, nil