یک پست با برچسب "اصل باز و بسته"

function calculateFee(transaction: Transaction) {
  if (transaction.type === 'deposit') {
    return 0
  }

  if (transaction.type === 'withdraw') {
    return transaction.amount * 0.01
  }

  if (transaction.type === 'transfer') {
    return 500
  }

  if (transaction.type === 'refund') {
    return 0
  }
}

function buildReportRow(transaction: Transaction) {
  if (transaction.type === 'deposit') {
    return {title: 'واریز', sign: '+'}
  }

  if (transaction.type === 'withdraw') {
    return {title: 'برداشت', sign: '-'}
  }

  if (transaction.type === 'transfer') {
    return {title: 'انتقال', sign: '-'}
  }

  if (transaction.type === 'refund') {
    return {title: 'برگشت وجه', sign: '+'}
  }
}