# Searcher

### 介绍

Searcher可以在BlockRazor RPC提供的Private Mempool上[訂閱交易](/tc/streams/mempool/private-mempool.md)執行backrun策略，再將[backrun bundle](#qing-qiu-shi-li)發送至BlockRazor RPC參與競拍獲得收益。

另外，Searcher也可以跳過bundle訂閱，直接將bundle發送至BlockRazor RPC，憑借高性能網絡的網絡加速服務，BlockRazor RPC可以極低延遲將bundle轉發至主流builders，无需重复对接builder接口。

### RPC端點

{% hint style="info" %}
請將訂閱bundle的域名與發送bundle的域名保持一致。如訂閱<https://jp-ethscutum.blockrazor.xyz/stream，則將bundle發送至https://jp-ethscutum.blockrazor.xyz>
{% endhint %}

<table><thead><tr><th width="148.99609375">地區</th><th>端點</th></tr></thead><tbody><tr><td>東京</td><td>https://jp-ethscutum.blockrazor.xyz</td></tr><tr><td>紐約</td><td>https://us-ethscutum.blockrazor.xyz</td></tr></tbody></table>

### eth\_sendBid

{% hint style="info" %}
為保護隱私交易，`eth_sendBid`採用准入制，如需發送bid請於我們[聯繫](https://discord.com/invite/qqJuwRb8Nh)。
{% endhint %}

#### 請求參數

<table><thead><tr><th width="128.52734375">參數</th><th width="67.5546875">必選</th><th width="116.62890625">格式</th><th width="129.56640625">示例</th><th>備註</th></tr></thead><tbody><tr><td>txs</td><td>是</td><td>[]string</td><td>["tx_hash", "rawTxHex"]</td><td><ul><li>tx_hash為數據流中的用戶交易，rawTxHex為自行構建的backrun交易</li><li>如backrun對象是一個bundle，請填寫bundle中的所有tx_hash</li></ul></td></tr><tr><td>blockNumber</td><td>否</td><td>hex string</td><td>"0x102286B"</td><td>一个十六进制编码的区块号，表示bundle在该区块号之前有效。默认值为当前区块号 + 100</td></tr></tbody></table>

#### Bid機制

BlockRazor會將Bid的`tx_hash`替換為rawTxHex，並在添加`refundPercent`和`refundRecipient`後立即轉發至Builder出塊。對於Builder而言，Bid價值量為backrun交易的`priority fee + coinbase.transfer()` ，由於同一筆用戶交易的`refundPercent`相同，因此價值量最高的Bid將成功上鏈。

#### 請求示例

**Backrun Originator Transaction**

```bash
curl https://eth.blockrazor.xyz \
  -X POST \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <token>" \
  --data '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_sendBid",
    "params": [
      {
        "txs": [
          "0x3a3c086bad1e765076986814939d2be70399e85ff75e4da8ec730aaf6ce3fea1",
          "0x02f86d0182149c808411e1a300830484e294fef10de0823f58df4f5f24856ab4274ededa6a5c8084c179306cc001a075d1f8fea39352c2da065aeef85be4b24789953f57a62ca7ad29b45bfc1e362aa043de44543083d0dafb80eaedd5764d6ef03336ff028ef02f238bccd5dfa9ece9"
        ],
        "blockNumber": "0x102286B"
      }
    ]
  }'
```

**Backrun Originator Bundle**

```bash
curl https://eth.blockrazor.xyz \
  -X POST \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer <token>" \
  --data '{
    "jsonrpc": "2.0",
    "id": 1,
    "method": "eth_sendBid",
    "params": [
      {
        "txs": [
          "0x3a3c086bad1e765076986814939d2be70399e85ff75e4da8ec730aaf6ce3fea1",
          "0x47816242f30167d1525a98801355f49370fc83049cb070d5d3ae9fd6c83d2d9d",
          "0x02f86d0182149c808411e1a300830484e294fef10de0823f58df4f5f24856ab4274ededa6a5c8084c179306cc001a075d1f8fea39352c2da065aeef85be4b24789953f57a62ca7ad29b45bfc1e362aa043de44543083d0dafb80eaedd5764d6ef03336ff028ef02f238bccd5dfa9ece9"
        ],
        "blockNumber": "0x102286B"
      }
    ]
  }'
```

#### 返回示例

```json
{
    "id": 1,
    "jsonrpc": "2.0",
    "result": "0x164d7d41f24b7f333af3b4a70b690cf93f636227165ea2b699fbb7eed09c46c7"
}
```

### eth\_sendBundle

Searcher也可以作為項目方發送raw bundle，詳見[項目方](/tc/transaction-submission/bundle/ethereum/xiang-mu-fang.md)


---

# 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.blockrazor.io/tc/transaction-submission/bundle/ethereum/searcher.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.