# OKX order support formal implementation

No OKX request, order, or cancel was made.

## Implemented production surface

`OkxClient` now has non-submitting static builders for:

- `build_post_only_limit_order_body`
- `build_entry_batch_order_body`
- `build_cancel_order_body`
- `build_pending_orders_params`
- `build_fills_params`

Existing `place_order` behavior is unchanged. No CLI command was added. No trading execution path calls the new builders.

## Verified shapes

- Single isolated `post_only` limit order body.
- Three independent isolated `post_only` entry bodies at 0.3%, 0.6%, and 0.9% offsets.
- Cancel body with exactly one order identifier.
- Pending-orders params with `instType=SWAP` and `instId`.
- Fills params with `instType=SWAP` and `instId`.

## Verification

Command:

```bash
rtk .venv/bin/pytest -q tests/test_okx_client.py
```

Result:

```text
75 passed in 0.06s
```