Auction v2 Param migration

x/auction/keeper/migrations.go

@@ -0,0 +1,21 @@
+package keeper
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	v1 "github.com/peggyjv/sommelier/v7/x/auction/migrations/v1"
+)
+
+// Migrator is a struct for handling in-place store migrations.
+type Migrator struct {
+	keeper Keeper
+}
+
+// NewMigrator returns a new Migrator.
+func NewMigrator(keeper Keeper) Migrator {
+	return Migrator{keeper: keeper}
+}
+
+// Migrate1to2 migrates from consensus version 1 to 2.
+func (m Migrator) Migrate1to2(ctx sdk.Context) error {
+	return v1.MigrateParamStore(ctx, m.keeper.paramSpace)
+}

x/auction/migrations/v1/store.go

@@ -0,0 +1,18 @@
+package v1
+
+import (
+	sdk "github.com/cosmos/cosmos-sdk/types"
+	paramstypes "github.com/cosmos/cosmos-sdk/x/params/types"
+	"github.com/peggyjv/sommelier/v7/x/auction/types"
+)
+
+func MigrateParamStore(ctx sdk.Context, subspace paramstypes.Subspace) error {
+	ctx.Logger().Info("auction v1 to v2: Migrating params")
+
+	if !subspace.Has(ctx, types.KeyAuctionBurnRate) {
+		subspace.Set(ctx, types.KeyAuctionBurnRate, types.DefaultParams().AuctionBurnRate)
+	}
+
+	ctx.Logger().Info("auction v1 to v2: Params migration complete")
+	return nil
+}