frontendOpenOrders

Get open orders formatted specifically for frontend display, with optimized data structure for UI rendering.

When to Use This Endpoint

The frontendOpenOrders endpoint is essential for:

• UI Development — Build trading interfaces with pre-formatted order data
• Order Display — Show orders in user-friendly format
• Real-time Updates — Refresh order books in trading applications
• Frontend Optimization — Use data already structured for display

Request

Endpoint

POST https://api-hyperliquid-mainnet-info.n.dwellir.com/info

Headers

Header	Value	Required
Content-Type	application/json	Yes
X-Api-Key	Your API key	Yes

Parameters

Parameter	Type	Required	Description
type	string	Yes	Must be "frontendOpenOrders"
user	string	Yes	User's Ethereum wallet address

Example Request

{
  "type": "frontendOpenOrders",
  "user": "0x31ca8395cf837de08b24da3f660e77761dfb974b"
}

Response

Success Response

Returns open orders formatted for frontend display.

{
  "orders": []
}

Response Fields

Field	Type	Description
orders	array	Array of order objects optimized for frontend display

Code Examples

cURL

curl -X POST 'https://api-hyperliquid-mainnet-info.n.dwellir.com/info' \
  -H 'X-Api-Key: YOUR_API_KEY' \
  -H 'Content-Type: application/json' \
  -d '{
    "type": "frontendOpenOrders",
    "user": "0x31ca8395cf837de08b24da3f660e77761dfb974b"
  }'

JavaScript

const ENDPOINT = 'https://api-hyperliquid-mainnet-info.n.dwellir.com/info';
const API_KEY = 'your-api-key-here';

async function getFrontendOpenOrders(userAddress) {
  const response = await fetch(ENDPOINT, {
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'X-Api-Key': API_KEY
    },
    body: JSON.stringify({
      type: 'frontendOpenOrders',
      user: userAddress
    })
  });

  if (!response.ok) {
    throw new Error(`HTTP ${response.status}: ${response.statusText}`);
  }

  return await response.json();
}

// Usage
const orders = await getFrontendOpenOrders('0x31ca8395cf837de08b24da3f660e77761dfb974b');
console.log(`Open orders: ${orders.orders.length}`);

Python

import requests
from typing import Dict

ENDPOINT = 'https://api-hyperliquid-mainnet-info.n.dwellir.com/info'
API_KEY = 'your-api-key-here'

def get_frontend_open_orders(user_address: str) -> Dict:
    """Get frontend-formatted open orders"""
    response = requests.post(
        ENDPOINT,
        json={
            'type': 'frontendOpenOrders',
            'user': user_address
        },
        headers={
            'Content-Type': 'application/json',
            'X-Api-Key': API_KEY
        },
        timeout=10
    )
    response.raise_for_status()
    return response.json()

# Usage
orders = get_frontend_open_orders('0x31ca8395cf837de08b24da3f660e77761dfb974b')
print(f"Open orders: {len(orders['orders'])}")

Go

package main

import (
    "bytes"
    "encoding/json"
    "fmt"
    "io"
    "net/http"
)

const (
    Endpoint = "https://api-hyperliquid-mainnet-info.n.dwellir.com/info"
    APIKey   = "your-api-key-here"
)

type FrontendOpenOrdersRequest struct {
    Type string `json:"type"`
    User string `json:"user"`
}

type FrontendOpenOrdersResponse struct {
    Orders []interface{} `json:"orders"`
}

func getFrontendOpenOrders(userAddress string) (*FrontendOpenOrdersResponse, error) {
    reqBody, _ := json.Marshal(FrontendOpenOrdersRequest{
        Type: "frontendOpenOrders",
        User: userAddress,
    })

    req, _ := http.NewRequest("POST", Endpoint, bytes.NewBuffer(reqBody))
    req.Header.Set("Content-Type", "application/json")
    req.Header.Set("X-Api-Key", APIKey)

    client := &http.Client{}
    resp, err := client.Do(req)
    if err != nil {
        return nil, err
    }
    defer resp.Body.Close()

    body, _ := io.ReadAll(resp.Body)

    var result FrontendOpenOrdersResponse
    if err := json.Unmarshal(body, &result); err != nil {
        return nil, err
    }

    return &result, nil
}

func main() {
    orders, err := getFrontendOpenOrders("0x31ca8395cf837de08b24da3f660e77761dfb974b")
    if err != nil {
        fmt.Printf("Error: %v\n", err)
        return
    }

    fmt.Printf("Open orders: %d\n", len(orders.Orders))
}

Common Use Cases

1. Display Open Orders in UI

Render orders in a trading interface:

async function displayOpenOrders(userAddress) {
  const data = await getFrontendOpenOrders(userAddress);

  console.log('=== Open Orders ===\n');

  if (data.orders.length === 0) {
    console.log('No open orders');
  } else {
    console.log(`${data.orders.length} open order(s)`);
    // Render orders in UI
  }
}

// Usage
await displayOpenOrders('0x31ca8395cf837de08b24da3f660e77761dfb974b');

2. Real-time Order Updates

Poll for order updates:

class OrderUpdateManager {
  constructor(userAddress, updateIntervalMs = 5000) {
    this.userAddress = userAddress;
    this.updateIntervalMs = updateIntervalMs;
    this.onUpdate = null;
  }

  async start(callback) {
    this.onUpdate = callback;

    while (true) {
      try {
        const orders = await getFrontendOpenOrders(this.userAddress);
        if (this.onUpdate) {
          this.onUpdate(orders);
        }
      } catch (error) {
        console.error('Failed to fetch orders:', error);
      }

      await new Promise(r => setTimeout(r, this.updateIntervalMs));
    }
  }
}

// Usage
const manager = new OrderUpdateManager('0x31ca8395cf837de08b24da3f660e77761dfb974b');
manager.start((orders) => {
  console.log(`Updated: ${orders.orders.length} orders`);
  // Update UI
});

3. Build Order Management Panel

Create order management interface:

async function getOrderPanel(userAddress) {
  try {
    const data = await getFrontendOpenOrders(userAddress);

    return {
      status: 'success',
      orders: data.orders,
      totalOrders: data.orders.length,
      hasOrders: data.orders.length > 0,
      lastUpdated: new Date().toISOString()
    };
  } catch (error) {
    return {
      status: 'error',
      error: error.message,
      orders: []
    };
  }
}

// Usage
const panel = await getOrderPanel('0x31ca8395cf837de08b24da3f660e77761dfb974b');
console.log('Order Panel:', panel);

4. Monitor Order Count

Track changes in order count:

async function monitorOrderCount(userAddress) {
  let previousCount = null;

  const check = async () => {
    const data = await getFrontendOpenOrders(userAddress);
    const currentCount = data.orders.length;

    if (previousCount !== null && currentCount !== previousCount) {
      const change = currentCount - previousCount;
      console.log(`Order count changed: ${change > 0 ? '+' : ''}${change}`);
    }

    previousCount = currentCount;
    return currentCount;
  };

  return check;
}

// Usage
const checkOrders = await monitorOrderCount('0x31ca8395cf837de08b24da3f660e77761dfb974b');
setInterval(checkOrders, 10000); // Check every 10 seconds

5. Order Status Dashboard

Create comprehensive order status view:

async function getOrderStatusDashboard(userAddress) {
  const data = await getFrontendOpenOrders(userAddress);

  return {
    totalOrders: data.orders.length,
    status: data.orders.length > 0 ? 'active' : 'no-orders',
    timestamp: new Date().toISOString(),
    orders: data.orders
  };
}

// Usage
const dashboard = await getOrderStatusDashboard('0x31ca8395cf837de08b24da3f660e77761dfb974b');
console.log('Order Dashboard:', dashboard);

Error Handling

Common Errors

Error	Cause	Solution
401 Unauthorized	Invalid API key	Verify your API key is correct
400 Bad Request	Missing or invalid user address	Ensure valid Ethereum address format
429 Too Many Requests	Rate limit exceeded	Implement request throttling
500 Internal Server Error	Server issue	Retry with exponential backoff

Error Response Example

{
  "error": "Missing required parameter: user",
  "code": "MISSING_PARAMETER"
}

Robust Error Handling

async function safeGetFrontendOpenOrders(userAddress, maxRetries = 3) {
  for (let i = 0; i < maxRetries; i++) {
    try {
      return await getFrontendOpenOrders(userAddress);
    } catch (error) {
      if (error.response?.status === 429) {
        await new Promise(r => setTimeout(r, Math.pow(2, i) * 1000));
      } else if (error.response?.status === 400) {
        throw new Error('Invalid user address');
      } else if (i === maxRetries - 1) {
        throw error;
      }
    }
  }
}

Best Practices

1. Poll efficiently — Update every 3-10 seconds for active trading UIs
2. Handle empty states — Display appropriate message when no orders exist
3. Optimize rendering — Only re-render when order data changes
4. Validate addresses — Ensure user addresses are valid before requests
5. Implement caching — Cache briefly (1-5 seconds) to reduce redundant calls

Performance Tips

Efficient Polling Strategy

class SmartOrderPoller {
  constructor(userAddress, baseInterval = 5000) {
    this.userAddress = userAddress;
    this.baseInterval = baseInterval;
    this.lastData = null;
  }

  async poll() {
    const data = await getFrontendOpenOrders(this.userAddress);

    // Only notify if data changed
    const hasChanged = JSON.stringify(data) !== JSON.stringify(this.lastData);
    this.lastData = data;

    return {
      data: data,
      changed: hasChanged
    };
  }
}

Related Endpoints

• openOrders — Get standard open orders format
• clearinghouseState — Get account state
• userFees — Get fee information for orders
• meta — Get trading pair metadata

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