{
  "transactionId": "txn-abc123",
  "type": "TOPUP",
  "status": "DONE",
  "createdAt": "2026-05-01T12:00:00Z",
  "history": [
    {
      "status": "PENDING",
      "timestamp": "2026-05-01T12:00:00Z"
    }
  ]
}