# Sign Metadata

**POST /wallets/{walletId}/signatures/{role}/{index}**

<p align="right">status: <strong>experimental</strong></p>

**⚠️ WARNING ⚠️**

This endpoint is experimental and for internal use in the Catalyst project. This
functionality will be refined in the forthcoming future and the interface is likely
to change in **NON-BACKWARD COMPATIBLE WAYS**.

<b>Note:</b> Only `Soft` indexes are supported by this endpoint.



## Servers
- https://localhost:8090/v2: https://localhost:8090/v2 ()



## Parameters

### Path parameters
- **walletId** (string(hex))

- **role** (string)

- **index** (string)
  An individual segment within a derivation path.

  The `H` suffix indicates a _Hardened_ child private key, which
  means that children of this key cannot be derived from the public
  key. Indices without a `H` suffix are called _Soft_.


### Body: application/json (object)

- **passphrase** (string)
  A master passphrase to lock and protect the wallet for sensitive operation (e.g. sending funds)
- **metadata** (object | null)



## Responses
### 400
Bad Request

#### Body: application/json (object)
- **message** (string)
  May occur when a request is not well-formed; that is, it fails to parse
  successfully. This could be the case when some required parameters
  are missing or, when malformed values are provided.
- **code** (string)


### 406
Not Acceptable

#### Body: application/json (object)
- **message** (string)
  May occur when providing an invalid 'Accept' header.
- **code** (string)


### 415
Unsupported Media Type

#### Body: application/json (object)
- **message** (string)
  A descriptive error message.
- **code** (string)
  A specific error code for this error, more precise than HTTP ones.

### 200
OK

#### Body: application/octet-stream (string(binary))
string(binary)

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