> ## Documentation Index
> Fetch the complete documentation index at: https://docs.thornode.io/llms.txt
> Use this file to discover all available pages before exploring further.

# BlockRazor route

> The Bifrost BlockRazor route in its v1 JSON and v2 plain-text forms.

`POST /blockrazor` accepts both BlockRazor HTTP contracts. Do not add the `apikey` header or `auth` query parameter; ThorNode supplies the credential. The response body is BlockRazor's, unchanged.

| Form          | Content type       | Transactions | Minimum tip        |
| ------------- | ------------------ | ------------ | ------------------ |
| v1 JSON       | `application/json` | 1            | 1,000,000 lamports |
| v2 plain text | `text/plain`       | 1            | 1,000,000 lamports |

## Tip addresses

```text theme={null}
FjmZZrFvhnqqb9ThCuMVnENaM3JGVuGWNyCAxRJcFpg9
6No2i3aawzHsjtThw81iq1EXPJN6rh8eSJCLaYZfKDTG
A9cWowVAiHe9pJfKAj3TJiN9VpbzMUq6E4kEvf5mUT22
Gywj98ophM7GmkDdaWs4isqZnDdFCW7B46TXmKfvyqSm
68Pwb4jS7eZATjDfhmTXgRJjCiZmw1L7Huy4HNpnxJ3o
4ABhJh5rZPjv63RBJBuyWzBK3g9gWMUQdTZP2kiW31V9
B2M4NG5eyZp5SBQrSdtemzk5TqVuaWGQnowGaCBt8GyM
5jA59cXMKQqZAVdtopv8q3yyw9SYfiE3vUCbt7p8MfVf
5YktoWygr1Bp9wiS1xtMtUki1PeYuuzuCF98tqwYxf61
295Avbam4qGShBYK7E9H5Ldew4B3WyJGmgmXfiWdeeyV
EDi4rSy2LZgKJX74mbLTFk4mxoTgT6F7HxxzG2HBAFyK
BnGKHAC386n4Qmv9xtpBVbRaUTKixjBe3oagkPFKtoy6
Dd7K2Fp7AtoN8xCghKDRmyqr5U169t48Tw5fEd3wT9mq
AP6qExwrbRgBAVaehg4b5xHENX815sMabtBzUzVB4v8S
```

## v1 JSON

```bash theme={null}
curl --fail-with-body "$BIFROST_ROUTE_URL" \
  --header 'content-type: application/json' \
  --data '{
    "transaction": "<BASE64_SIGNED_TRANSACTION>",
    "mode": "fast",
    "safeWindow": 3,
    "revertProtection": false
  }'
```

`transaction` is required. `mode` is `fast` or `sandwichMitigation`; `safeWindow` is 3–13. The response is JSON with a `signature` field.

## v2 plain text

The body is the bare base64 transaction; options go in the query string.

```bash theme={null}
curl --fail-with-body "$BIFROST_ROUTE_URL?mode=fast&revertProtection=true" \
  --header 'content-type: text/plain' \
  --data '<BASE64_SIGNED_TRANSACTION>'
```

BlockRazor answers with the HTTP status codes in its [send-transaction v2 reference](https://blockrazor.gitbook.io/blockrazor/transaction-submission/fast/solana/send-transaction-v2).

## Next steps

* [Bifrost errors and pre-forward checks](/api-reference/bifrost/overview)
* [BlockRazor send-transaction reference](https://blockrazor.gitbook.io/blockrazor/transaction-submission/fast/solana/send-transaction)