# Limit orders

Create, list, get, replace, and cancel off-chain limit orders. Public create and replace requests mirror the quote shape and add `minAmountOut` plus expiry controls.

## Prerequisites

* API key (header `Authorization: Bearer YOUR_API_KEY`)
* Base URL: `https://api.gateway.zert.com/api/v1`

## Step 1: Create a limit order

Call `POST /limit-orders/limit` with the quote-style fields `fromChain`, `toChain`, `tokenIn`, `tokenOut`, and `amount`, plus `minAmountOut`. Create requests require an `Idempotency-Key`.

```bash
curl -X POST 'https://api.gateway.zert.com/api/v1/limit-orders/limit' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Idempotency-Key: limit-create-001' \
  -d '{
    "timeInForce": "GTC",
    "minAmountOut": "1",
    "fromChain": "arbitrum",
    "toChain": "avax",
    "tokenIn": "TBTC",
    "tokenOut": "WETH",
    "network": "mainnet",
    "amount": "100.00",
    "slippageBps": 75,
    "recipient": "0x1234567890123456789012345678901234567890"
  }'
```

Response includes `data.limitOrderId`, `data.status`, `data.expiresAtMs`, and `data.minAmountOut`.

## Step 2: List your limit orders

Call `GET /limit-orders/limits` to list orders for the authenticated owner. Use query `limit` (1–200) and optional `status` (e.g. `open`, `canceled`).

```bash
curl -X GET 'https://api.gateway.zert.com/api/v1/limit-orders/limits?limit=20&status=open' \
  -H 'Authorization: Bearer YOUR_API_KEY'
```

## Step 3: Get or cancel a single order

* **Get:** `GET /limit-orders/limit/{limitOrderId}` — returns full order details.
* **Cancel:** `DELETE /limit-orders/limit/{limitOrderId}` — requires `Idempotency-Key`; optional body `{"reason": "..."}`.

```bash
# Get
curl -X GET 'https://api.gateway.zert.com/api/v1/limit-orders/limit/lim_abc123' \
  -H 'Authorization: Bearer YOUR_API_KEY'

# Cancel
curl -X DELETE 'https://api.gateway.zert.com/api/v1/limit-orders/limit/lim_abc123' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Idempotency-Key: limit-cancel-001' \
  -H 'Content-Type: application/json' \
  -d '{"reason": "user_request"}'
```

## Step 4: Replace an open order

Call `POST /limit-orders/limit/{limitOrderId}/replace` with the same request shape as create. Replacement requests also require `Idempotency-Key`.

```bash
curl -X POST 'https://api.gateway.zert.com/api/v1/limit-orders/limit/lim_abc123/replace' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Bearer YOUR_API_KEY' \
  -H 'Idempotency-Key: limit-replace-001' \
  -d '{
    "timeInForce": "GTC",
    "minAmountOut": "2",
    "fromChain": "arbitrum",
    "toChain": "avax",
    "tokenIn": "TBTC",
    "tokenOut": "WETH",
    "network": "mainnet",
    "amount": "100.00"
  }'
```

## Summary

| Step | Endpoint                                | Purpose                   |
| ---- | --------------------------------------- | ------------------------- |
| 1    | `POST /limit-orders/limit`              | Create limit order        |
| 2    | `GET /limit-orders/limits`              | List owner's limit orders |
| 3    | `GET /limit-orders/limit/{id}`          | Get one order             |
| 3    | `DELETE /limit-orders/limit/{id}`       | Cancel one order          |
| 4    | `POST /limit-orders/limit/{id}/replace` | Replace an open order     |

See [Create Limit Order](/api-reference/limit-orders/limit-order-create.md), [List Limit Orders](/api-reference/limit-orders/limit-orders-list.md), [Get or Cancel Limit Order](/api-reference/limit-orders/limit-order-get-cancel.md), and [Replace Limit Order](/api-reference/limit-orders/limit-order-replace.md) for full parameters and responses.


---

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