# submit-batch

{% hint style="info" %}
Enabling `useBundle=true` may introduce additional latency because transactions are routed through bundle engines across multiple hops. Use it **only** when revert protection is required or execution speed is not critical.
{% endhint %}

The maximum batch size is **25** signed transactions. If `useBundle=true`, the maximum batch size is reduced to **4** signed transactions to adhere to third-party block engine requirements.

Each signed transaction in the batch must satisfy the standard tip requirements described in our tip documentation [here](/solana/trader-api/introduction/tip-and-tipping-addresses.md). When `useBundle=true`, the tip should only be included in the final transaction in the batch.

## Request

#### Method:

`POST ./api/v2/submit-batch`

#### Parameters:

<table><thead><tr><th width="222.87353515625">Parameter</th><th width="251.2">Type</th><th width="445">Description</th></tr></thead><tbody><tr><td><code>entries</code></td><td><code>PostSubmitRequestEntry</code><br>[]</td><td>A list of signed transactions. See <code>PostSubmitRequestEntry</code> below</td></tr><tr><td><code>useBundle</code></td><td>boolean</td><td><strong>OPTIONAL.</strong> Specify if you would like to send transactions as a bundle only (all transactions land or none at all). Default <code>false</code>.</td></tr><tr><td><code>frontRunningProtection</code></td><td>boolean</td><td><strong>OPTIONAL.</strong> Our infrastructure scores current and upcoming slot leaders in real time, identifying validators with an elevated risk of malicious ordering. High-risk leaders (identified through sandwich correlations and validator behaviour analytics) are delayed or skipped. Low-risk leaders receive accelerated submission through staked connections, improving both protection and time-to-land. Default <code>False</code>.</td></tr></tbody></table>

`PostSubmitRequestEntry`

<table><thead><tr><th width="192">Parameter</th><th width="218.2"></th><th width="445">Description</th></tr></thead><tbody><tr><td><code>transaction</code></td><td><code>TransactionMessage</code></td><td>See <code>TransactionMessage</code> below</td></tr><tr><td><code>skipPreFlight</code></td><td>boolean</td><td><strong>OPTIONAL.</strong> Useful for disabling transaction simulation before actual submission. Default <code>false</code>.</td></tr></tbody></table>

`TransactionMessage`

<table><thead><tr><th width="181">Parameter</th><th width="166.2"></th><th width="390">Description</th></tr></thead><tbody><tr><td><code>content</code></td><td>txbase64Payload</td><td>Base64 signed transaction bytes</td></tr></tbody></table>

#### Request example:

{% tabs %}
{% tab title="HTTP" %}

```bash
curl -X POST "http://ny.solana.dex.blxrbdn.com/api/v2/submit-batch" \
  -H "Authorization: $AUTH_HEADER" \
  -H "Content-Type: application/json" \
  -d '{
    "entries": [
      {
        "transaction": {
          "content": "AayHbuFlHrJV5V53CAyBW0IM6PHeqfbIF2PegMEU..."
        },
        "skipPreFlight": false
      },
      {
        "transaction": {
          "content": "AeNTbB0vnGNSGVybg/mzbtfZzmwvNPJsWgmQJshxK..."
        },
        "skipPreFlight": false
      },
      {
        "transaction": {
          "content": "AUTTE4Oa9qKhimePjDHGpnh9F5FtRfMwuPuVGyxytt..."
        },
        "skipPreFlight": false
      }
    ],
    "useBundle": false,
    "frontRunningProtection": false
  }'
```

{% endtab %}

{% tab title="WebSocket" %}

```bash
• wscat -c ws://ny.solana.dex.blxrbdn.com/ws --execute '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "PostSubmitBatchV2",
    "params": {
      "entries": [
        {
          "transaction": {
            "content": "AayHbuFlHrJV5V53CAyBW0IM6PHeqfbIF2PegMEUOzc1gQ7Qe8NDgk1XnpKLIwwO..."
          },
          "skipPreFlight": false
        },
        {
          "transaction": {
            "content": "AeNTbB0vnGNSGVybg/mzbtfZzmwvNPJsWgmQJshxKp6aAxu3wAaWPmZUupbBat0u..."
          },
          "skipPreFlight": false
        },
        {
          "transaction": {
            "content": "AUTTE4Oa9qKhimePjDHGpnh9F5FtRfMwuPuVGyxyttlIuIwSrW8KLbqjsGtPzGDH..."
          },
          "skipPreFlight": false
        }
      ],
      "useBundle": false,
      "frontRunningProtection": false
    }
  }'
```

{% endtab %}
{% endtabs %}

### Response:

#### Fields:

<table><thead><tr><th width="214">Field</th><th width="110">Type</th><th width="422">Description</th></tr></thead><tbody><tr><td><code>transactions</code></td><td>list</td><td>A list of signatures.</td></tr></tbody></table>

<table><thead><tr><th width="214">Field</th><th width="110">Type</th><th width="422">Description</th></tr></thead><tbody><tr><td><code>signature</code></td><td>string</td><td>Solana signature of the submitted transaction</td></tr><tr><td><code>error</code></td><td>string</td><td>Return error message.</td></tr><tr><td><code>submitted</code></td><td>boolean</td><td>If the transaction has been submitted.</td></tr></tbody></table>

#### Example:

{% tabs %}
{% tab title="JSON" %}

```json
{
	"transactions": [
		{
			"signature": "4T4ou8LBZ3y8mDvJQyv6FwzWYyrVun6imocEJPTsZ8sqM6BwzhjErujAyj3xMD1SDjysxVP2pAopKR8yHkCGUhon",
			"submitted": true
		},
		{
			"signature": "5YcHd1LwkzfPACWBdBq7rfb1pRMf9ypyp4tJrngMpN8nTJnG11NGLA8KMaoUrWivWtVRyCcjXP9oaGmJSsJhpGBk",
			"submitted": true
		},
		{
			"signature": "2NowWRYoqFibBrz7b8iivtyhoc6WRx1WSN9ZusbEcXk4Waw5a1udYkBbK7x5eYVfLyQsN116ND1VmVoeHUgyNh7b",
			"submitted": true
		}
	]
}
```

{% endtab %}
{% endtabs %}

You can look up this signature in a Solana Explorer like [SolScan](https://solscan.io/) or [Solana Explorer](https://explorer.solana.com/).


---

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