import { Base , CallbackFunction } from 'db-migrate-base' ; import removeColumn from './util/removeColumn' ; export function up ( db , callback ) { return db . addColumn ( 'channel' , 'settlementPeriod' , { type : 'string' } , callback ) ; } export function down ( db , callback ) { removeColumn ( db , 'channel' , 'settlementPeriod' , callback ) ; }