# Identity: leaf

> Install the chain the wallet issued: the identity becomes, or renews as, 2.0

## Install the chain the wallet issued: the identity becomes, or renews as, 2.0

`POST /v1/identities/{slug}/leaf` · operation `installLeaf`

Requires the `batondeck:identities:manage` permission (action `cert:install`).

Requires a step-up: MFA enrolled and re-authenticated within 15 minutes. **Not reachable with an API key** — a key has no session and so can never step up.

Refused while the workspace is suspended or on deletion hold.

**Parameters**

| Name | In | Type | Required | Notes |
|---|---|---|---|---|
| `slug` | path | string | yes |  |

**Request body** (`application/json`)

| Field | Type | Required | Notes |
|---|---|---|---|
| `chain` | array of string | yes |  |
| `credential_id` | string \\| null |  |  |
| `backup_verified` | boolean \\| null |  |  |

<details>
<summary>Request schema</summary>

```json
{
  "type": "object",
  "properties": {
    "chain": {
      "minItems": 2,
      "maxItems": 2,
      "type": "array",
      "items": {
        "type": "string",
        "minLength": 1
      }
    },
    "credential_id": {
      "anyOf": [
        {
          "type": "string",
          "minLength": 1,
          "maxLength": 512
        },
        {
          "type": "null"
        }
      ]
    },
    "backup_verified": {
      "anyOf": [
        {
          "type": "boolean"
        },
        {
          "type": "null"
        }
      ]
    }
  },
  "required": [
    "chain"
  ],
  "additionalProperties": false
}
```

</details>

**Responses**

| Status | Meaning |
|---|---|
| 201 | Install the chain the wallet issued: the identity becomes, or renews as, 2.0 |
| 400 | The arguments did not validate. |
| 401 | No portal session, and no live API key. |
| 403 | The policy refused, or the request was cross-site. |
| 404 | No such resource, or none this session may see. |

<details>
<summary>201 response schema</summary>

```json
{
  "type": "object",
  "properties": {
    "root_fingerprint": {
      "type": "string"
    },
    "kid": {
      "type": "string"
    },
    "endpoint": {
      "type": "string"
    },
    "not_before": {
      "type": "string"
    },
    "not_after": {
      "type": "string"
    },
    "purpose": {
      "type": "string"
    },
    "first": {
      "type": "boolean"
    },
    "superseded_kid": {
      "anyOf": [
        {
          "type": "string"
        },
        {
          "type": "null"
        }
      ]
    }
  },
  "required": [
    "root_fingerprint",
    "kid",
    "endpoint",
    "not_before",
    "not_after",
    "purpose",
    "first",
    "superseded_kid"
  ],
  "additionalProperties": false
}
```

</details>

```sh
curl -X POST 'https://api.batondeck.com/v1/identities/:slug/leaf' \
  -H "Authorization: Bearer $BATONDECK_API_KEY" \
  -H 'content-type: application/json' \
  -d @body.json
```