> ## Documentation Index
> Fetch the complete documentation index at: https://cobo-docs-feature-cobo-cli.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Babylon Prepare Staking

> <Note>This content applies to WaaS 1.0 only. We highly recommend that you upgrade to [WaaS 2.0](https://www.cobo.com/developers/v2/guides/overview/introduction).</Note> This endpoint is used to create a pre-signed staking transaction, accepting parameters such as `request_id`, `stake_info`, `fee_rate`, and `max_staking_fee`. Please note that a successfully created staking transaction will not be broadcast automatically; you need to call the [Babylon Broadcast Staking Transaction](/developers/api-references/mpc-wallet/babylon_broadcast_staking_transaction) endpoint to broadcast it.

#### Request

<ParamField body="request_id" type="String" required>transaction request ID (unique identifier of a transaction request, which must correspond to a client's transaction; UUID should be used and the length should be equal to or less than 120 characters)</ParamField>

<ParamField body="stake_info" type="String" required>
  detailed information for constructing a staking transaction in JSON format

  * asset\_coin: string, code of the staking token
  * stake\_address: string, staking address
  * amount: int, staking amount
  * stake\_block\_time: int, number of staking blocks, which starts counting after the transaction is on the chain
  * finality\_provider: string, pubkey hex of the provider to be used for staking. The default is None, which uses the provider pubkey hex managed by Cobo

  ```python Sample
  '{"asset_coin": "SIGNET_BTC", "stake_address": "tb1pg4n40etj6qf8c7zj0lzfswaey58f30ps4d9fnezwj5m7fc62w2pqgp0fxm", "amount": 50000, "stake_block_time": 64000, "finality_provider": "88b32b005d5b7e29e6f82998aff023bff7b600c6a1a74ffac984b3aa0579b384"}'
  ```
</ParamField>

<ParamField body="fee_rate" type="Float" required>transaction fees per byte</ParamField>
<ParamField body="max_staking_fee" type="Int">maximum fee for constructing the transaction. If the actual fee exceeds this limit, the creation will fail. The default is None.</ParamField>

#### Response

<ResponseField name="success" type="bool">request successful or failed</ResponseField>
<ResponseField name="result" type="String">""</ResponseField>

<RequestExample>
  ```python Python
  request(
      "POST",
      "/v1/custody/mpc/babylon/prepare_staking/",
      {
          "request_id": "1717059604245",
          "stake_info": '{"asset_coin": "SIGNET_BTC", "stake_address": "tb1pg4n40etj6qf8c7zj0lzfswaey58f30ps4d9fnezwj5m7fc62w2pqgp0fxm", "amount": 50000, "stake_block_time": 64000, "finality_provider": "88b32b005d5b7e29e6f82998aff023bff7b600c6a1a74ffac984b3aa0579b384"}',
          "fee_rate": 7.5,
          "max_staking_fee": 2000
      },
      api_key, api_secret, host
  )
  ```

  ```javascript JavaScript
  coboFetch('POST', '/v1/custody/mpc/babylon/prepare_staking/', {
      "request_id": "1717059604245",
      "stake_info": '{"asset_coin": "SIGNET_BTC", "stake_address": "tb1pg4n40etj6qf8c7zj0lzfswaey58f30ps4d9fnezwj5m7fc62w2pqgp0fxm", "amount": 50000, "stake_block_time": 64000, "finality_provider": "88b32b005d5b7e29e6f82998aff023bff7b600c6a1a74ffac984b3aa0579b384"}',
      "fee_rate": 7.5,
      "max_staking_fee": 2000
  }, api_key, api_secret, host)
      .then(res => {
          res.json().then((data)=>{
              console.log(JSON.stringify(data, null, 4));
          })
      }).catch(err => {
          console.log(err)
      });
  ```

  ```go Go
  Request("POST", "/v1/custody/mpc/babylon/prepare_staking/", map[string]string{
      "request_id": "1717059604245",
      "stake_info": '{"asset_coin": "SIGNET_BTC", "stake_address": "tb1pg4n40etj6qf8c7zj0lzfswaey58f30ps4d9fnezwj5m7fc62w2pqgp0fxm", "amount": 50000, "stake_block_time": 64000, "finality_provider": "88b32b005d5b7e29e6f82998aff023bff7b600c6a1a74ffac984b3aa0579b384"}',
      "fee_rate": 7.5,
      "max_staking_fee": 2000
  })
  ```
</RequestExample>

<ResponseExample>
  ```json
  {
    "success": true,
    "result": ""
  }

  ```
</ResponseExample>