text: 'use strict'
  
  // ----------------------------------------------------------------------------
  
  const assert = require ('assert')
  
  // ----------------------------------------------------------------------------
  
  module.exports = (exchange, balance, method) => {
  
      const currencies = [
          'USD',
          'USDT',
          'CNY',
          'EUR',
          'BTC',
          'ETH',
          'JPY',
          'LTC',
          'DASH',
          'DOGE',
          'UAH',
          'RUB',
          'XRP',
      ]
  
      assert (typeof balance['total'] === 'object')
      assert (typeof balance['free'] === 'object')
      assert (typeof balance['used'] === 'object')
  
      const codes = Object.keys (balance['total'])
      for (let i = 0; i < codes.length; i++) {
          const code = codes[i]
          const total = balance['total'][code]
          const free = balance['free'][code]
          const used = balance['used'][code]
          if ((total !== undefined) && (free !== undefined) && (used !== undefined)) {
              assert (total === free + used, 'free and used do not sum to total ' + exchange.id)
          }
      }
  
      let result = currencies
          .filter ((currency) => (currency in balance) &&
              (balance[currency]['total'] !== undefined))
  
      if (result.length > 0) {
          result = result.map ((currency) => currency + ': ' + balance[currency]['total'])
          if (exchange.currencies.length > result.length) {
              result = result.join (', ') + ' + more...'
          } else {
              result = result.join (', ')
          }
  
      } else {
  
          result = 'zero balance'
      }
  
      console.log (result)
  
  }
  