> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.immix.xyz/api-reference/rest-api/chain-policies/approve/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.immix.xyz/_mcp/server.

# Approve a chain policy

POST /chain-policies/{id}/approve
Content-Type: application/json

Concludes the pending proposal (`chain-policies:approve`, not its proposer): an activation, amendment or retirement. Nothing pending refuses 409 `NOTHING_PENDING`.

Reference: https://docs.immix.xyz/api-reference/rest-api/chain-policies/approve

## Authentication

- `Authorization` header (bearer token, required) — Bearer authentication of the form `Bearer <token>`, where token is your auth token.

## Request

### Path parameters

- `id` (integer, required) — The record's id — a positive 32-bit integer the platform minted.

### Headers

- `Idempotency-Key` (string, required) — Required on every write: a URL-safe string of 1 to 64 characters from `[A-Za-z0-9._~-]` (a UUID fits), scoped to you. It names one operation on one record, ever: a retry replays the stored outcome (`Idempotent-Replay: true`) or attaches to the live one, and reuse on another record refuses 409 `IDEMPOTENCY_KEY_REUSED`. Missing or malformed, 400.
- `If-Match` (string, optional) — The `ETag` the read minted, quoted or bare; absent or `*` is unconditional; a weak validator refuses 400 `INVALID_IF_MATCH`. A stale value answers 412 `VERSION_CONFLICT` with `currentVersion` and a fresh `ETag`: re-read, reapply, retry. Send it — every write restates the whole record, so an unconditional write overwrites every field from your copy, and an amend against a pending proposal replaces that proposal.

### Body (application/json)

This endpoint expects an object.

- `chainPolicyId` (integer, optional)
- `expectedVersion` (string, optional, nullable) — int64 as a decimal JSON string

## Response

### 200

The chain policy as the platform now holds it after the write — the same row the read serves, with the answering change's position, the row's `ETag` and, on a replayed key, `Idempotent-Replay`.

- `assetId` (integer, required) — Refdata reference.
- `chain` (enum, required) — ≠ UNKNOWN on a policy row. UNKNOWN is the unset sentinel: outputs only — as input, omit the field instead; explicit UNKNOWN refuses 400. The value set is append-only: a consumer READING this field treats an unknown name as UNKNOWN, never as an error; as input an unknown name refuses 400 — the parse is strict
  - Allowed values: `UNKNOWN`, `BITCOIN`, `ETHEREUM`
- `chainPolicyId` (integer, required) — Sticky entity key.
- `globalSequence` (string, required) — The position as a decimal string — the last change this member had applied, orders and balance readings included.
- `orgId` (integer, required) — Owner-stamped.
- `pendingTransition` (enum, required) — NONE is the unset sentinel: outputs only — as input, omit the field instead; explicit NONE refuses 400. The value set is append-only: a consumer READING this field treats an unknown name as NONE, never as an error; as input an unknown name refuses 400 — the parse is strict
  - Allowed values: `NONE`, `ACTIVATE`, `AMEND`, `REACTIVATE`, `UNFREEZE`, `RETIRE`, `REVOKE`, `ROTATE`, `RESUME_TRADING`
- `status` (enum, required) — UNKNOWN is the unset sentinel: outputs only — as input, omit the field instead; explicit UNKNOWN refuses 400. The value set is append-only: a consumer READING this field treats an unknown name as UNKNOWN, never as an error; as input an unknown name refuses 400 — the parse is strict
  - Allowed values: `UNKNOWN`, `DRAFT`, `PENDING_APPROVAL`, `ACTIVE`, `RETIRED`
- `version` (string, required) — The row's version — monotonic per record, bumped on every change; served as the ETag and taken by If-Match. int64 as a decimal JSON string
- `isEnabled` (boolean, optional) — FALSE = chain disabled for this asset: an unstated chain moves nothing. a boolean; absent reads false
- `maxTransferAmount` (string, optional, nullable) — 0 = no bound. money (a Decimal on the wire: a scaled integer with its own scale), served as an exact decimal string at the value's own scale — every fractional digit that scale states, trailing zeros included; never raw; null when the 0 sentinel means unset
- `minConfirmations` (integer, optional, nullable) — The settle gate: the confirmation depth at which an on-chain transfer counts as settled rather than in transit; 0 = not stated, and a transfer never settles (the strict reading).
- `minTransferAmount` (string, optional, nullable) — 0 = no bound. money (a Decimal on the wire: a scaled integer with its own scale), served as an exact decimal string at the value's own scale — every fractional digit that scale states, trailing zeros included; never raw; null when the 0 sentinel means unset
- `pendingByUserId` (integer, optional, nullable) — The user whose proposal is pending, so an approver is checked to be someone else; 0 when nothing is pending.
- `settlementSlaNs` (string, optional, nullable) — The obligation's value-date offset (value date = the envelope time plus this); 0 = due immediately, so breaches surface at once (the noisy-safe reading). int64 as a decimal JSON string
- `unscaled` (boolean, optional, deprecated) — Never present since 0.3.3: every money value on this API states its own scale on the wire — a policy amount or cap since 0.3.3, an order's and an execution's since 0.3.2, a balance's since 0.3.1 — so a row is never served raw, whether or not this member holds the asset or instrument it references. Kept, deprecated, so a client generated from 0.3.2 still compiles; it goes at the next major.

## Errors

### 400 Approve Chain Policies Request Bad Request Error

Refused at the door — nothing reached the platform and the key was not journaled: a missing or malformed `Idempotency-Key` or `If-Match`, malformed JSON, a body `userId`, a body restating the path or `If-Match` differently, a money string off its `pattern` (an exponent, a plus sign, a bare point, surrounding whitespace) or past its `maxLength`, or one no value here can state (over 18 fractional digits, or past a 64-bit integer at its own scale), or any other value outside the schema.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 401 Approve Chain Policies Request Unauthorized Error

No bearer token, or one that does not verify.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 403 Approve Chain Policies Request Forbidden Error

Authenticated, but not admitted. `FORBIDDEN_PRINCIPAL`: a token with no `org_id`, a non-ASCII `org_id` or `sub`, a disabled user, or a local binding with no user. `AWAITING_ADMISSION`: your user is not yet admitted — every route but `GET /me` answers this until an administrator admits you. `ORG_NOT_ACTIVE`: your organisation is suspended, pending activation, retired or unregistered. The record owners' 403s (`CAPABILITY_DENIED`, `SELF_APPROVAL`, `NOT_PROPOSER`, …) are refusals on the platform's stream: they carry the position header, and a retried key replays them with `Idempotent-Replay`.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 404 Approve Chain Policies Request Not Found Error

No such row in your organisation — another organisation's row is indistinguishable from an absent one. The position header says as of when.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 409 Approve Chain Policies Request Conflict Error

The record owner's refusal, by class: 409 for a state or uniqueness refusal, 422 for a field or reference refusal — a fact on the platform's stream, so it carries the position header and a retried key replays it. The same statuses also carry two door refusals that are never journaled: 409 `IDEMPOTENCY_KEY_REUSED` and, on `POST /orders`, 422 `INSTRUMENT_NOT_LIVE` for a symbol this member holds no instrument under and 422 `ACCOUNT_NOT_ACTIVE` for a display name no live account of your org holds (the owner answers both codes, as facts, to an id it will not trade) — a retry takes fresh.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 412 Approve Chain Policies Request Precondition Failed Error

`If-Match` is stale (`VERSION_CONFLICT`): the envelope carries `currentVersion` and the `ETag` header the current row — re-read, reapply, retry. A retried key replays it with `Idempotent-Replay`.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 413 Approve Chain Policies Request Content Too Large Error

The platform refused the command's size (`TOO_LARGE`); nothing was submitted, a retry takes fresh. Not expected for any route here.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 422 Approve Chain Policies Request Unprocessable Entity Error

The record owner's refusal, by class: 409 for a state or uniqueness refusal, 422 for a field or reference refusal — a fact on the platform's stream, so it carries the position header and a retried key replays it. The same statuses also carry two door refusals that are never journaled: 409 `IDEMPOTENCY_KEY_REUSED` and, on `POST /orders`, 422 `INSTRUMENT_NOT_LIVE` for a symbol this member holds no instrument under and 422 `ACCOUNT_NOT_ACTIVE` for a display name no live account of your org holds (the owner answers both codes, as facts, to an id it will not trade) — a retry takes fresh.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 429 Approve Chain Policies Request Too Many Requests Error

Shed at once: `INBOX_FULL` or `IN_FLIGHT_FULL` (this member's bounds; nothing queued, the key not journaled), the intake's `RATE_LIMITED`, or the orders owner's `RATE_CEILING` (the organisation's per-minute ceiling — a refusal on the stream, replayed like any). `Retry-After` says when.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 500 Approve Chain Policies Request Internal Server Error

The gateway failed to serve (`INTERRUPTED`, `INTERNAL_ERROR`, `PROJECTION_MISS`); the operation record, if one exists, is still readable.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

### 503 Approve Chain Policies Request Service Unavailable Error

This member cannot carry the write now: `NOT_PRIMED` (still catching up), `NOT_SERVING` (a read-only or not-ready member), `OWNER_ABSENT` (the record owner has no active member), `INTAKE_UNAVAILABLE` (no credential store here), or the platform's own outcome for a command lost in transit. Nothing was journaled; retry against a serving member.

- `error` (ErrorError, required)
- `currentVersion` (string, optional) — On 412 `VERSION_CONFLICT`: the row's current version (the `ETag` carries the same token) — re-read, reapply, retry.

## Types

### ErrorError

- `code` (string, required) — The code to branch on — stable and append-only: treat one you do not know by its HTTP status. The gateway's own: - 400: `MALFORMED_REQUEST`, `MISSING_IDEMPOTENCY_KEY`, `INVALID_IDEMPOTENCY_KEY`, `INVALID_IF_MATCH` - 401: `UNAUTHENTICATED` - 403: `FORBIDDEN_PRINCIPAL`, `AWAITING_ADMISSION`, `ORG_NOT_ACTIVE`, `CAPABILITY_DENIED` (the credential intake) - 404: `NOT_FOUND`, `UNKNOWN_OPERATION` - 409: `IDEMPOTENCY_KEY_REUSED`, `INTAKE_KEY_REUSED` - 413: `TOO_LARGE`, `PAYLOAD_TOO_LARGE` - 422: `INSTRUMENT_NOT_LIVE` and `ACCOUNT_NOT_ACTIVE` (`POST /orders`: a symbol or an account name nothing here holds — the orders owner answers the same codes to an unheld id), `VENUE_UNSUPPORTED`; `SCALE_UNKNOWN` (retired: only a member below `0.3.4` answers it) - 429: `INBOX_FULL`, `IN_FLIGHT_FULL`, `RATE_LIMITED` - 500: `INTERRUPTED`, `INTERNAL_ERROR`, `PROJECTION_MISS` - 503: `NOT_PRIMED`, `NOT_SERVING`, `OWNER_ABSENT`, `INTAKE_UNAVAILABLE`, `BALANCES_UNAVAILABLE`, `LOST`, `REJECTED_NOT_REGISTERED`, `REJECTED_NOT_ACTIVE` The record owners' refusals ride verbatim — `OrgRegisterRejected.reason` and `OrderRejected.reason` list them, and the guide's Errors section maps each to its status.
- `message` (string, optional) — Free text for humans; may change without notice — never parse it.

## Examples

**Request**

```json
{}
```

**Response**

```json
{
  "assetId": 1,
  "chain": "UNKNOWN",
  "chainPolicyId": 1,
  "globalSequence": "globalSequence",
  "orgId": 1,
  "pendingTransition": "NONE",
  "status": "UNKNOWN",
  "version": "version",
  "isEnabled": true,
  "maxTransferAmount": "maxTransferAmount",
  "minConfirmations": 1,
  "minTransferAmount": "minTransferAmount",
  "pendingByUserId": 1,
  "settlementSlaNs": "settlementSlaNs"
}
```

**SDK Code**

```python
import requests

url = "https://api.example.com/chain-policies/1/approve"

payload = {}
headers = {
    "Idempotency-Key": "Idempotency-Key",
    "Authorization": "Bearer <token>",
    "Content-Type": "application/json"
}

response = requests.post(url, json=payload, headers=headers)

print(response.json())
```

```javascript
const url = 'https://api.example.com/chain-policies/1/approve';
const options = {
  method: 'POST',
  headers: {
    'Idempotency-Key': 'Idempotency-Key',
    Authorization: 'Bearer <token>',
    'Content-Type': 'application/json'
  },
  body: '{}'
};

try {
  const response = await fetch(url, options);
  const data = await response.json();
  console.log(data);
} catch (error) {
  console.error(error);
}
```

```go
package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://api.example.com/chain-policies/1/approve"

	payload := strings.NewReader("{}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Idempotency-Key", "Idempotency-Key")
	req.Header.Add("Authorization", "Bearer <token>")
	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(res)
	fmt.Println(string(body))

}
```

```ruby
require 'uri'
require 'net/http'

url = URI("https://api.example.com/chain-policies/1/approve")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Idempotency-Key"] = 'Idempotency-Key'
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{}"

response = http.request(request)
puts response.read_body
```

```java
import com.mashape.unirest.http.HttpResponse;
import com.mashape.unirest.http.Unirest;

HttpResponse<String> response = Unirest.post("https://api.example.com/chain-policies/1/approve")
  .header("Idempotency-Key", "Idempotency-Key")
  .header("Authorization", "Bearer <token>")
  .header("Content-Type", "application/json")
  .body("{}")
  .asString();
```

```php
<?php
require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://api.example.com/chain-policies/1/approve', [
  'body' => '{}',
  'headers' => [
    'Authorization' => 'Bearer <token>',
    'Content-Type' => 'application/json',
    'Idempotency-Key' => 'Idempotency-Key',
  ],
]);

echo $response->getBody();
```

```csharp
using RestSharp;

var client = new RestClient("https://api.example.com/chain-policies/1/approve");
var request = new RestRequest(Method.POST);
request.AddHeader("Idempotency-Key", "Idempotency-Key");
request.AddHeader("Authorization", "Bearer <token>");
request.AddHeader("Content-Type", "application/json");
request.AddParameter("application/json", "{}", ParameterType.RequestBody);
IRestResponse response = client.Execute(request);
```

```swift
import Foundation

let headers = [
  "Idempotency-Key": "Idempotency-Key",
  "Authorization": "Bearer <token>",
  "Content-Type": "application/json"
]
let parameters = [] as [String : Any]

let postData = JSONSerialization.data(withJSONObject: parameters, options: [])

let request = NSMutableURLRequest(url: NSURL(string: "https://api.example.com/chain-policies/1/approve")! as URL,
                                        cachePolicy: .useProtocolCachePolicy,
                                    timeoutInterval: 10.0)
request.httpMethod = "POST"
request.allHTTPHeaderFields = headers
request.httpBody = postData as Data

let session = URLSession.shared
let dataTask = session.dataTask(with: request as URLRequest, completionHandler: { (data, response, error) -> Void in
  if (error != nil) {
    print(error as Any)
  } else {
    let httpResponse = response as? HTTPURLResponse
    print(httpResponse)
  }
})

dataTask.resume()
```