> For the complete documentation index, see [llms.txt](https://docs.ltonetwork.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ltonetwork.com/protocol/public/transactions/data.md).

# Data

### JSON

```javascript
{
  "type": 12,
  "version": 3,
  "id": "8M6dgn85eh3bsHrVhWng8FNaHBcHEJD4MPZ5ZzCciyon",
  "sender": "3Jq8mnhRquuXCiFUwTLZFVSzmQt3Fu6F7HQ",
  "senderKeyType": "ed25519",
  "senderPublicKey": "AJVNfYjTvDD2GWKPejHbKPLxdvwXjAnhJzo6KCv17nne",
  "fee": 14000000,
  "timestamp": 1610397549043,
  "data": [
    {
      "type": "boolean",
      "value": true,
      "key": "bool"
    },
    {
      "type": "binary",
      "value": "base64:SGVsbG8gV2F2ZXM=",
      "key": "bin"
    },
    {
      "type": "integer",
      "value": 1234567,
      "key": "int"
    },
    {
      "type": "string",
      "value": "some text",
      "key": "str"
    }
  ],
  "proofs": [
    "4aMwABCZwtXrGGKmBdHdR5VVFqG51v5dPoyfDVZ7jfgD3jqc851ME5QkToQdfSRTqQmvnB9YT4tCBPcMzi59fZye"
  ],
  "height": 1069662
}
```

{% hint style="info" %}

* `id` and `height` should be omitted when broadcasting. These fields are set by the node.
* Binary strings are base58 encoded.
* `timestamp` is in microseconds since epoch.
* `fee` includes 8 digits, so `LTO * 10^8`
  {% endhint %}

### Data entries

Data entries are one of 4 types: "boolean", "integer", "string", and "binary". A data transaction can have a maximum of 100 data entries.

In JSON, the value of a binary data entry must be base64 encoded and prefixed with `"base64:"`. The value of the integer type is a signed long (8 bytes).

### Fees

The fees of a data transaction are determined by the size of the data entries. The base fee is 1 LTO, with an additional fee of 0.1 LTO per 256 bytes.

### Binary schema

The binary data structure of the unsigned transaction.

{% tabs %}
{% tab title="V3 (current)" %}

<table><thead><tr><th width="150">#</th><th align="center">Field Name</th><th align="center">Type</th><th>Length</th></tr></thead><tbody><tr><td>1</td><td align="center">Transaction type</td><td align="center">Byte (constant, value=12)</td><td>1</td></tr><tr><td>2</td><td align="center">Version</td><td align="center">Byte (constant, value=3)</td><td>1</td></tr><tr><td>3</td><td align="center">Network id</td><td align="center">Byte</td><td>1</td></tr><tr><td>4</td><td align="center">Timestamp</td><td align="center">Long</td><td>8</td></tr><tr><td>5</td><td align="center">Sender's key type</td><td align="center">KeyType (Byte)</td><td>1</td></tr><tr><td>6</td><td align="center">Sender's public key</td><td align="center">PublicKey (Array[Byte])</td><td>32 | 33</td></tr><tr><td>7</td><td align="center">Fee</td><td align="center">Long</td><td>8</td></tr><tr><td>8</td><td align="center">Number of entries</td><td align="center">Short</td><td>2</td></tr><tr><td>9</td><td align="center">Entry 1</td><td align="center"></td><td></td></tr><tr><td>...</td><td align="center"></td><td align="center"></td><td></td></tr></tbody></table>

{% hint style="info" %}

* Anchor length and Anchor can be repeated for each anchor hash.
* Network id can be obtained by taking the 2nd byte from the sender address.
* Each [key type](/protocol/accounts.md#key-types) has a numeric id in addition to the reference from the JSON.
* Integers (short, int, long) have a big endian byte order.
  {% endhint %}
  {% endtab %}
  {% endtabs %}

### Binary schema of data entries

The encoding of a data entry depends on the type.

#### Integer

| Type  | Byte (constant, value=0) | 1 |
| ----- | ------------------------ | - |
| Value | Long                     | 8 |

#### Boolean

| Type  | Byte (constant, value=1) | 1 |
| ----- | ------------------------ | - |
| Value | Byte                     | 1 |

#### Binary

| Type       | Byte (constant, value=2) | 1 |
| ---------- | ------------------------ | - |
| Length (N) | Short                    | 2 |
| Value      | Array\[Byte]             | N |

#### String

| Type       | Byte (constant, value=3) | 1 |
| ---------- | ------------------------ | - |
| Length (N) | Short                    | 2 |
| Value      | String (UTF-8)           | N |