mukan-ibc/modules/core/03-connection/keeper/migrations.go

package keeper

import (
	sdk "github.com/cosmos/cosmos-sdk/types"

	connectionv7 "github.com/cosmos/ibc-go/v10/modules/core/03-connection/migrations/v7"
	"github.com/cosmos/ibc-go/v10/modules/core/03-connection/types"
)

// 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}
}

// Migrate3to4 migrates from version 3 to 4.
// This migration writes the sentinel localhost connection end to state.
func (m Migrator) Migrate3to4(ctx sdk.Context) error {
	connectionv7.MigrateLocalhostConnection(ctx, m.keeper)
	return nil
}

// MigrateParams migrates from consensus version 4 to 5.
// This migration takes the parameters that are currently stored and managed by x/params
// and stores them directly in the ibc module's state.
func (m Migrator) MigrateParams(ctx sdk.Context) error {
	var params types.Params
	m.keeper.legacySubspace.GetParamSet(ctx, &params)
	if err := params.Validate(); err != nil {
		return err
	}

	m.keeper.SetParams(ctx, params)
	m.keeper.Logger(ctx).Info("successfully migrated connection to self-manage params")
	return nil
}