> For the complete documentation index, see [llms.txt](https://docs.ordinalsbot.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ordinalsbot.com/preinscribedlaunchpad/setup-padding-outputs.md).

# Setup Padding Outputs

{% hint style="info" %}
An API Key is required to interact with Launchpad APIs. Please contact us to get an API Key and get started.
{% endhint %}

Use this endpoint to create a transaction that will create padding outputs for the buyer.

This returns a PSBT in base64 format which needs to be signed and broadcast by the buyer's payment wallet address.

### `POST` /launchpad/setup-padding-outputs

<mark style="color:green;">`POST`</mark> `https://api.ordinalsbot.com/launchpad/setup-padding-outputs`

API Key is required in the header:

`headers: { 'x-api-key': '<YOUR_API_KEY>', ...otherHeaders }`

Example Request Body, this will create a new `launch`:

```json
{
  "address": "3NyCZefqHSYiQRQdqaxYkaHnuFED1vyc4q",
  "publicKey": "4fa4865e593f24fbf0852ca94039e68cdaae783098918ed6b0118fad4e476541",
  "feeRateTier": "fastestFee"
}
```

#### Request Body

| address\*    | String | Buyer's payment wallet address. The buyer will need to pay the cost of the transaction from UTXOs belonging to this address.            |
| ------------ | ------ | --------------------------------------------------------------------------------------------------------------------------------------- |
| publicKey\*  | String | Public Key for buyer's payment wallet address.                                                                                          |
| feeRateTier  | String | Transaction fee rate should be one of the following. Defaults to fastestFee if not specified: fastestFee halfHourFee hourFee minimumFee |
| numOfOutPuts | number | Number of dummy padding outputs to create. This defaults to 3 if not specified                                                          |

{% tabs %}
{% tab title="200: OK " %}

```json
// Response has to be signed the the payment wallet
{
    "buyerInputIndices": [
        0
    ],
    "psbt": "cHNidP1BAP15AQIAAAAE1K5...........", // base64 transaction to be signed
    "psbtHex": "70736..."
}


```

{% endtab %}

{% tab title="500: Internal Server Error " %}

```json
{
    status: 'error',
    error: 'error reason'
}
```

{% endtab %}
{% endtabs %}


---

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