# NegativeUNL

[[Source]](https://github.com/XRPLF/rippled/blob/f64cf9187affd69650907d0d92e097eb29693945/include/xrpl/protocol/detail/ledger_entries.macro#L85-L91)

The `NegativeUNL` ledger entry type contains the current status of the [Negative UNL](/docs/concepts/consensus-protocol/negative-unl), a list of trusted validators currently believed to be offline.

Each ledger version contains **at most one** `NegativeUNL` entry. If no validators are currently disabled or scheduled to be disabled, there is no `NegativeUNL` entry.

NegativeUNL
## Example  JSON


```json
{
    "DisabledValidators": [
      {
        "DisabledValidator": {
          "FirstLedgerSequence": 91371264,
          "PublicKey": "ED58F6770DB5DD77E59D28CB650EC3816E2FC95021BB56E720C9A12DA79C58A3AB"
        }
      }
    ],
    "Flags": 0,
    "LedgerEntryType": "NegativeUNL",
    "PreviousTxnID": "8D47FFE664BE6C335108DF689537625855A6A95160CC6D351341B92624D9C5E3",
    "PreviousTxnLgrSeq": 91442944,
    "index": "2E8A59AA9D3B5B186B0B9E0F62E6C02587CA74A4D778938E957B6357D364B244"
}
```

##  Fields

In addition to the [common fields](/docs/references/protocol/ledger-data/common-fields), the  ledger entry has the following fields:

| Name | JSON Type | [Internal Type](/docs/references/protocol/binary-format) | Required? | Description |
|  --- | --- | --- | --- | --- |
| `DisabledValidators` | Array | Array | No | A list of `DisabledValidator` objects (see below), each representing a trusted validator that is currently disabled. |
| `LedgerEntryType` | String | UInt16 | Yes | The value `0x004E`, mapped to the string `NegativeUNL`, indicates that this entry is the Negative UNL. |
| `PreviousTxnID` | String | UInt256 | No | The identifying hash of the transaction that most recently modified this entry.  |
| `PreviousTxnLgrSeq` | Number | UInt32 | No | The [index of the ledger](/docs/references/protocol/data-types/basic-data-types#ledger-index) that contains the transaction that most recently modified this entry.  |
| `ValidatorToDisable` | String | Blob | No | The public key of a trusted validator that is scheduled to be disabled in the next flag ledger. |
| `ValidatorToReEnable` | String | Blob | No | The public key of a trusted validator in the Negative UNL that is scheduled to be re-enabled in the next flag ledger. |


### DisabledValidator Objects

Each `DisabledValidator` object represents one disabled validator. In JSON, a `DisabledValidator` object has one field, `DisabledValidator`, which in turn contains another object with the following fields:

| Name | JSON Type | [Internal Type](/docs/references/protocol/binary-format) | Description |
|  --- | --- | --- | --- |
| `FirstLedgerSequence` | Number | UInt32 | The [ledger index](/docs/references/protocol/data-types/basic-data-types#ledger-index) when the validator was added to the Negative UNL. |
| `PublicKey` | String | Blob | The master public key of the validator, in hexadecimal. |


##  Flags

There are no flags defined for the  entry.

## NegativeUNL ID Format

The ID of the `NegativeUNL` entry is the hash of the `NegativeUNL` space key (`0x004E`) only. This means that the ID is always:


```
2E8A59AA9D3B5B186B0B9E0F62E6C02587CA74A4D778938E957B6357D364B244
```