text: var db = require('./db')
  
  exports.up = function (next) {
    const sql = [
      'alter table trades add column error text',
    ]
  
    db.multi(sql, next)
  }
  
  exports.down = function (next) {
    const sql = ['alter table trades drop column error']
  
    db.multi(sql, next)
  }
  