# Flashbots

expand.network API users looking for MEV protectoin can choose to route their transactions through Flashbots. 

### Supported Chains

Currently only available on **Ethereum Mainnet.**

### Available Endpoints:

*Click on the endpoint to jump to the section with full details*

* [**/getflashbotblocks** ](#getflashbotblocks)<mark style="color:blue;">`GET`</mark> - Returns details for a flashbot block.
* [**/getflashbottransactions** ](#getflashbottransactions)<mark style="color:blue;">`GET`</mark> - Returns details for flashbot transactions.
* [**/getflashbotbundle**](#getflashbotbundle) <mark style="color:blue;">`GET`</mark> - Get details for a specified flashbot bundle.
* [**/sendtransaction**](#sendtransaction) <mark style="color:green;">`POST`</mark> - Send a transaction on a specified chain. If the mevProtection parameter is set to true, the transaction will be directed through flashbots.

***

## Endpoint Details

### **/getflashbotblocks**

Returns details for a flashbot block.

<mark style="color:blue;">`GET`</mark> `https://api.expand.network/chain/getflashbotblocks`

#### Query Parameters

| Name        | Type   | Description                                                  |
| ----------- | ------ | ------------------------------------------------------------ |
| chainId     | String | Refer to the [Chain ID ](/ids/chain-ids.md)page for details. |
| chainSymbol | String | Refer to the [Chain ID ](/ids/chain-ids.md)page for details. |

{% tabs %}
{% tab title="Sample Request" %}

```url
https://api.expand.network/chain/getflashbotblocks?chainId=1
```

{% endtab %}

{% tab title="Sample Response" %}

```json
{
    "status": 200,
    "msg": "success",
    "data": {
        "paris": 1,
        "blocks": [
            {
                "block_number": 18974792,
                "miner_reward": "17726971662419410",
                "fee_recipient_eth_diff": "17726971662419410",
                "miner": "0xDAFEA492D9c6733ae3d56b7Ed1ADB60692c98Bc5",
                "fee_recipient": "0xDAFEA492D9c6733ae3d56b7Ed1ADB60692c98Bc5",
                "coinbase_transfers": "0",
                "eth_sent_to_fee_recipient": "0",
                "gas_used": 8039689,
                "gas_price": "2204932511",
                "effective_priority_fee": "2204932511",
                "transactions": [
                    {
                        "transaction_hash": "0xa34125f19982fdcd8f8ac012b7924ecf145d9f1c5a5aae060b68e7d0b403c491",
                        "tx_index": 0,
                        "bundle_type": "flashbots",
                        "bundle_index": 0,
                        "block_number": 18974792,
                        "eoa_address": "0x5DB4b98e3deF62f0fce1267Db1d77639C43C3B14",
                        "to_address": "0x77E06c9eCCf2E797fd462A92B6D7642EF85b0A44",
                        "gas_used": 106331,
                        "gas_price": "31119562123",
                        "coinbase_transfer": "0",
                        "eth_sent_to_fee_recipient": "0",
                        "total_miner_reward": "3308974160100713",
                        "fee_recipient_eth_diff": "3308974160100713"
                    },
                    {
                        "transaction_hash": "0x5719b3ee2891cd3d4bdbcf3d5d3b41fb2f68f3e027ee825b84ca4b6b51ddef8d",
                        "tx_index": 0,
                        "bundle_type": "mempool",
                        "bundle_index": 1,
                        "block_number": 18974792,
                        "eoa_address": "0xFB12622b729599db9c30469bD36787cA2e9413c3",
                        "to_address": "0x04d44A44E0be0a692938baeC467F22c4dBDF719b",
                        "gas_used": 21000,
                        "gas_price": "17607123388",
                        "coinbase_transfer": "0",
                        "eth_sent_to_fee_recipient": "0",
                        "total_miner_reward": "369749591148000",
                        "fee_recipient_eth_diff": "369749591148000"
                    }
                ]
            },
            {
                "block_number": 18974736,
                "miner_reward": "24107460683890845",
                "fee_recipient_eth_diff": "24107460683890845",
                "miner": "0xDAFEA492D9c6733ae3d56b7Ed1ADB60692c98Bc5",
                "fee_recipient": "0xDAFEA492D9c6733ae3d56b7Ed1ADB60692c98Bc5",
                "coinbase_transfers": "0",
                "eth_sent_to_fee_recipient": "0",
                "gas_used": 17311402,
                "gas_price": "1392577024",
                "effective_priority_fee": "1392577024",
                "transactions": [
                    {
                        "transaction_hash": "0xa049c8a8ce354fca67277d7218fd4b70c798d6c92d7e2ab5779d644187dfa0bb",
                        "tx_index": 0,
                        "bundle_type": "flashbots",
                        "bundle_index": 0,
                        "block_number": 18974736,
                        "eoa_address": "0x000812de2241aB594aE154060028F70F39DAE000",
                        "to_address": "0x00fa0B420C3119F473c2463104FB9d4E91E445af",
                        "gas_used": 21000,
                        "gas_price": "26962839990",
                        "coinbase_transfer": "0",
                        "eth_sent_to_fee_recipient": "0",
                        "total_miner_reward": "566219639790000",
                        "fee_recipient_eth_diff": "566219639790000"
                    },
                    {
                        "transaction_hash": "0x09486a4e90887c631f3dbb2f33a4c0d700f7079e48eba48580f4d74ade51f5fc",
                        "tx_index": 1,
                        "bundle_type": "flashbots",
                        "bundle_index": 0,
                        "block_number": 18974736,
                        "eoa_address": "0x00fa0B420C3119F473c2463104FB9d4E91E445af",
                        "to_address": "0x6B175474E89094C44Da98b954EedeAC495271d0F",
                        "gas_used": 47018,
                        "gas_price": "26962839990",
                        "coinbase_transfer": "0",
                        "eth_sent_to_fee_recipient": "0",
                        "total_miner_reward": "1267738810649820",
                        "fee_recipient_eth_diff": "1267738810649820"
                    }
                ]
            }
        ],
        "latest_block_number": 18974792
    }
}
```

{% endtab %}
{% endtabs %}

[back to top](#endpoints-available)

### **/getflashbottransactions**

Returns details for flashbot transactions.

<mark style="color:blue;">`GET`</mark> `https://api.expand.network/chain/getflashbottransactions`

#### Query Parameters

| Name        | Type   | Description                                                  |
| ----------- | ------ | ------------------------------------------------------------ |
| chainId     | String | Refer to the [Chain ID ](/ids/chain-ids.md)page for details. |
| chainSymbol | String | Refer to the [Chain ID ](/ids/chain-ids.md)page for details. |

{% tabs %}
{% tab title="Sample Request" %}

```url
https://api.expand.network/chain/getflashbottransactions?chainId=1
```

{% endtab %}

{% tab title="Sample Response" %}

```json
{
    "status": 200,
    "msg": "success",
    "data": {
        "transactions": [
            {
                "transaction_hash": "0xbcf55b7e9488135c12f3e70bd2a191cc19913475de6937f54cb9843865416391",
                "tx_index": 0,
                "bundle_index": 21,
                "block_number": 18975317,
                "eao_address": "0x2aC74Bd02EE017fa05629432Dd3728720c455032",
                "to_address": "0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2",
                "gas_used": 30428,
                "gas_price": "10000002",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "304280060856",
                "fee_recipient_eth_diff": "304280060856"
            },
            {
                "transaction_hash": "0xd441a44e2adf57f0d53e027d4441cdfee8653cd7f259ec0c90b60ea144b31d32",
                "tx_index": 0,
                "bundle_index": 20,
                "block_number": 18975317,
                "eao_address": "0x758aC3DC8FB6F939adf42bB83e717f94619052f5",
                "to_address": "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789",
                "gas_used": 118712,
                "gas_price": "11300000",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "1341445600000",
                "fee_recipient_eth_diff": "1341445600000"
            },
            {
                "transaction_hash": "0x02cbeb153f91225abcdad3cd4d39d457b5e13f3fb1191f26c73c328c50f54071",
                "tx_index": 0,
                "bundle_index": 19,
                "block_number": 18975317,
                "eao_address": "0x4a25D28d10B02BCF13a16068F56d167D8F96d093",
                "to_address": "0x5FF137D4b0FDCD49DcA30c7CF57E578a026d2789",
                "gas_used": 181502,
                "gas_price": "12500000",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "2268775000000",
                "fee_recipient_eth_diff": "2268775000000"
            },
            {
                "transaction_hash": "0x2b89ed3dbfe8946229468f33e31ed447631c192906344b7c62b6e927a7a5a512",
                "tx_index": 12,
                "bundle_index": 18,
                "block_number": 18975317,
                "eao_address": "0x4960DC043DDc244A02192898B3e2F1730194F0ac",
                "to_address": "0xf2B2420CEff184EEc76B3de15bd90C5734e45449",
                "gas_used": 21000,
                "gas_price": "10000001",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "210000021000",
                "fee_recipient_eth_diff": "210000021000"
            }
        ],
        "latest_block_number": 18975317
    }
}
```

{% endtab %}
{% endtabs %}

[back to top](#endpoints-available)

### **/getflashbotbundle**

Get details for a specified flashbot bundle.

<mark style="color:blue;">`GET`</mark> `https://api.expand.network/chain/getflashbottransactions`

#### Query Parameters

| Name                                         | Type   | Description                                                  |
| -------------------------------------------- | ------ | ------------------------------------------------------------ |
| chainId                                      | String | Refer to the [Chain ID ](/ids/chain-ids.md)page for details. |
| chainSymbol                                  | String | Refer to the [Chain ID ](/ids/chain-ids.md)page for details. |
| bundleHash<mark style="color:red;">\*</mark> | String | The bundle hash.                                             |

{% tabs %}
{% tab title="Sample Request" %}

```url
https://api.expand.network/chain/getflashbotbundle?bundleHash=0x2228f5d8954ce31dc1601a8ba264dbd401bf1428388ce88238932815c5d6f23f
```

{% endtab %}

{% tab title="Sample Response" %}

```json
{
    "status": 200,
    "msg": "success",
    "data": {
        "transactions": [
            {
                "transaction_hash": "0xd9cdf1483a85aa206625c66fea49059b96ffae1c086f76664cfa3f91a495d73a",
                "tx_index": 0,
                "bundle_index": 3,
                "block_number": 9091437,
                "eao_address": "0x8D460B72eaF3d63830E16C22d1Fc6908D0834Abe",
                "to_address": "0x8D460B72eaF3d63830E16C22d1Fc6908D0834Abe",
                "gas_used": 21000,
                "gas_price": "1000000000",
                "coinbase_transfer": "0",
                "eth_sent_to_fee_recipient": "0",
                "total_miner_reward": "21000000000000",
                "fee_recipient_eth_diff": "21000000000000"
            }
        ]
    }
}
```

{% endtab %}
{% endtabs %}

[back to top](#endpoints-available)

### /sendtransaction

Send a transaction on a specified chain. If the mevProtection parameter is set to true, the transaction will be directed through flashbots.

<mark style="color:green;">`POST`</mark> `https://api.expand.network/chain/sendtransaction`

#### Request Body

| Name                                             | Type    | Description                                                                                                            |
| ------------------------------------------------ | ------- | ---------------------------------------------------------------------------------------------------------------------- |
| rpc                                              | String  | Remote procedural call URL.                                                                                            |
| chainId                                          | String  | Refer to the [Chain ID ](/ids/chain-ids.md)page for details.                                                           |
| chainSymbol                                      | String  | Refer to the [Chain ID ](/ids/chain-ids.md)page for details.                                                           |
| rawTransaction<mark style="color:red;">\*</mark> | String  | The encoded transaction, obtained from the signed transaction.                                                         |
| bdnTransaction                                   | Boolean | <p>If true, then txn goes through the bdn route, which speeds up the transaction process.</p><p>By default, false.</p> |
| mevProtection                                    | Boolean | If true, then txn goes through flashbots.                                                                              |

{% tabs %}
{% tab title="Sample Request" %}
**With mevProtection: true**&#x20;

```json
{
    "chainId":"1",
    "rawTransaction": "0xf8a68205180f82753e94dc31ee1784292379fbb2964b3b9c4124d8f89c6080b844a9059cbb000000000000000000000000a67e9b68c41b0f26184d64c26e0b2b81466e5994000000000000000000000000000000000000000000000000000000174876e8002ea0952b0468aff066f3e00a1d476b8894d84bfc47a1a3cdab9d6809a3461cc713e5a018219ee382aa3c7edf73a87bd8a75e2c40a97efbdf56a6cfd353af06fb74101d",
    "mevProtection": true
}
```

{% endtab %}

{% tab title="Sample Response" %}
**With mevProtection: true** &#x20;

```json
{
    "status": 200,
    "msg": "success",
    "data": {
        "txHash": "0xd9cdf1483a85aa206625c66fea49059b96ffae1c086f76664cfa3f91a495d73a"
    }
}
```

{% endtab %}
{% endtabs %}

[back to top](#endpoints-available)


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.expand.network/integrations/flashbots.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.