# Undo

### Fields

In addition to the basic packet fields undo packets have the following additional fields:

| Field Name         | JSON type           | Description                                                    |
| ------------------ | ------------------- | -------------------------------------------------------------- |
| game               | int                 | The game in which the point was scored                         |
| scores             | array (scores)      | An array of the game scores up until this point                |
| matchScore         | array (match score) | An array of the current match score after correction           |
| undoneEventSeqNums | array (number)      | An array of the `seqNum`s of packets undone by this correction |

```
{
    "eventElementType": "Undo",
    "id": 0,
    "seqNum": 27,
    "matchScore": {
        "pointsA": 0,
        "pointsB": 0
    },
    "scores": [
        {
            "pointsA": 0,
            "pointsB": 11
        },
        {
            "pointsA": 5,
            "pointsB": 4
        },
        {
            "pointsA": 0,
            "pointsB": 0
        },
        {
            "pointsA": 0,
            "pointsB": 0
        },
        {
            "pointsA": 0,
            "pointsB": 0
        }
    ],
    "game": 2,
    "timestamp": "1970-01-01T00:00:00.000Z",
     "undoneEventSeqNums": [
    26
    ]
}
```