Retrieves a transaction
{- "_id": "tran_aOP3pfjvangf5X0j",
- "merchantId": "mcht_aOP3pfjvangf5X0g",
- "customerId": "cust_aOP3pfjvangf5X0h",
- "merchantOrderId": "ordr_aOP3pfjvangf5X0k",
- "transactionPayType": {
- "payCardId": "card_aOP3qfjvangf5X08"
}, - "amount": 0,
- "currency": "AUD",
- "surchargeAmount": 0,
- "status": "accepted",
- "statusBeforeDispute": "accepted",
- "lastChargeId": "chrg_aOP3pfjvangf5X0l",
- "refundedAmount": 0,
- "payoutId": "payout_aOP3pvjvangf5X0s",
- "createdAt": "2019-08-24T14:15:22Z",
- "updatedAt": "2019-08-24T14:15:22Z",
- "fee": 0
}