code: func (n *Node) DBProvider(ctx *node.DBContext) (dbm.DB, error) {
  	db := DBProvider(ctx.ID, dbm.DBBackendType(ctx.Config.DBBackend), ctx.Config.DBDir())
  	n.closers = append(n.closers, db)
  	return db, nil
  }
docs: // Since Tendermint doesn't close its DB connections