From 3662c43b27581a26c382e787f994ccdd07aca877 Mon Sep 17 00:00:00 2001
From: jelysn <129082781+jelysn@users.noreply.github.com>
Date: Wed, 14 Feb 2024 18:26:17 +0800
Subject: [PATCH] Usdc earn query fix (#373)

* fix denom problem, add upgrade handler for stablestake

* Resolve the usage of deposit denom

* fix GetDepositDenom function

* add migration for interest range from 10% - 50%
---
 x/stablestake/keeper/params.go           |  5 ++---
 x/stablestake/migrations/v3_migration.go | 13 +++++++++++++
 x/stablestake/module.go                  |  2 +-
 3 files changed, 16 insertions(+), 4 deletions(-)
 create mode 100644 x/stablestake/migrations/v3_migration.go

diff --git a/x/stablestake/keeper/params.go b/x/stablestake/keeper/params.go
index 778ae4775..5417b4ec4 100644
--- a/x/stablestake/keeper/params.go
+++ b/x/stablestake/keeper/params.go
@@ -18,10 +18,9 @@ func (k Keeper) SetParams(ctx sdk.Context, params types.Params) {
 
 func (k Keeper) GetDepositDenom(ctx sdk.Context) string {
 	params := k.GetParams(ctx)
-	depositDenom := params.DepositDenom
 	entry, found := k.assetProfileKeeper.GetEntry(ctx, params.DepositDenom)
 	if !found {
-		depositDenom = entry.Denom
+		return params.DepositDenom
 	}
-	return depositDenom
+	return entry.Denom
 }
diff --git a/x/stablestake/migrations/v3_migration.go b/x/stablestake/migrations/v3_migration.go
new file mode 100644
index 000000000..5b0184c70
--- /dev/null
+++ b/x/stablestake/migrations/v3_migration.go
@@ -0,0 +1,13 @@
+package migrations
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+)
+
+func (m Migrator) V3Migration(ctx sdk.Context) error {
+	params := m.keeper.GetParams(ctx)
+	params.InterestRateMin = sdk.NewDecWithPrec(10, 2) // 10%
+	params.InterestRateMax = sdk.NewDecWithPrec(50, 2) // 50%
+	m.keeper.SetParams(ctx, params)
+	return nil
+}
diff --git a/x/stablestake/module.go b/x/stablestake/module.go
index ed2ef7b88..16ea46d57 100644
--- a/x/stablestake/module.go
+++ b/x/stablestake/module.go
@@ -117,7 +117,7 @@ func (am AppModule) RegisterServices(cfg module.Configurator) {
 	types.RegisterMsgServer(cfg.MsgServer(), keeper.NewMsgServerImpl(am.keeper))
 	types.RegisterQueryServer(cfg.QueryServer(), am.keeper)
 	m := migrations.NewMigrator(am.keeper)
-	err := cfg.RegisterMigration(types.ModuleName, 1, m.V2Migration)
+	err := cfg.RegisterMigration(types.ModuleName, 2, m.V3Migration)
 	if err != nil {
 		panic(err)
 	}