Bybit Futures API Integration Using ccxt Library with Error Handling

This JavaScript code initializes a DataTables instance on an HTML table with the ID #exampleTable. It enhances the table with various features like responsiveness, server-side processing, AJAX data fetching, and custom styling.

• responsive: true makes the table adapt to different screen sizes.

Ensure you have a Laravel project set up. You can create a new Laravel project by running:

composer create-project --prefer-dist laravel/laravel example-app

Now let’s query the ERC-20 token transfer history for a specific wallet address using the Etherscan API.

const axios = require('axios');

// Replace with your Etherscan API key
const apiKey = 'YOUR_ETHERSCAN_API_KEY';

// Replace with the wallet address you want to query
const address = '0xYourEthereumAddress';

// Replace with the ERC-20 token contract address
const contractAddress = '0xTokenContractAddress';

// Etherscan API URL to fetch ERC-20 token transactions
const url = `https://api.etherscan.io/api?module=account&action=tokentx&contractaddress=${contractAddress}&address=${address}&startblock=0&endblock=99999999&sort=asc&apikey=${apiKey}`;

async function getTokenTransactions() {
    try {
        // Make the API request to Etherscan
        const response = await axios.get(url);
        const transactions = response.data.result;

        // Log the token transactions
        transactions.forEach(tx => {
            console.log(`
                From: ${tx.from}
                To: ${tx.to}
                Value: ${ethers.utils.formatUnits(tx.value, 18)} Tokens
                Transaction Hash: ${tx.hash}
            `);
        });
    } catch (error) {
        console.error('Error fetching token transactions:', error);
    }
}

// Call the function to get the token transactions
getTokenTransactions();

In this tutorial, we will compare Etherscan and Infura, two popular services for interacting with the Ethereum blockchain. Both provide APIs, but they serve different purposes and are suited for different types of applications. By understanding the strengths of each, you can choose the right one based on your specific use case, whether it involves querying blockchain data or interacting with the Ethereum network in real-time.

• Basic understanding of Ethereum and blockchain concepts.
• Familiarity with APIs and programming in Node.js or any other language.

You can also query transaction details directly in your browser by visiting:

https://api.etherscan.io/api?module=proxy&action=eth_getTransactionByHash&txhash=0xYourTransactionHash&apikey=YOUR_ETHERSCAN_API_KEY

In this tutorial, you learned how to use Ethers.js to query the balance of an Ethereum wallet in Node.js. You also saw how to use Infura or connect to a public node to access the Ethereum network. This is the foundation for working with Ethereum and interacting with wallets and smart contracts in a programmatic way.

By connecting to the Ethereum network and querying wallet balances, you now have a powerful tool for building decentralized applications (dApps) and automating blockchain-related tasks.

For example, in token burn events, project developers often send tokens to this address to signal to the community that those tokens are now out of circulation. This is usually followed by a public announcement, detailing the number of tokens burned and the reasons behind the burn.

Token burns are typically done to increase scarcity, and scarcity can lead to a higher token value if demand remains the same or increases. The basic principle of supply and demand comes into play: when the supply of an asset is reduced, it becomes more valuable (assuming demand holds steady).

20 Useful Node.js tips to improve your Node.js development skills:

These Node.js tips will help you write more robust, secure, and efficient Node.js applications and improve your development workflow.

Save the file and restart Apache:

sudo systemctl restart apache2

cd laravel-passport-api

افتح ملف .env وعدل إعدادات قاعدة البيانات لتتناسب مع بيئتك:

AJAX allows form submissions to be processed in the background without reloading the page.

Fetch and display search results in real-time as users type in the search box.

The Reflect API provides methods that mirror the behavior of standard object operations but are more consistent and predictable. Here are a few examples:

• Reflect.get: Retrieves the value of a property on an object.

axios.all([
    axios.get('https://jsonplaceholder.typicode.com/posts/1'),
    axios.get('https://jsonplaceholder.typicode.com/posts/2')
  ])
  .then(axios.spread((post1, post2) => {
    console.log('Post 1:', post1.data);
    console.log('Post 2:', post2.data);
  }))
  .catch(error => {
    console.error('Error fetching data:', error);
  });

• We use axios.all() to send multiple requests.
• The axios.spread() function is used to handle the responses separately.

- array: Fixed or dynamic array

- mapping: Key-value store (e.g., mapping(address => uint))

• Key Features:
• 2,000+ servers in 75+ countries.
• Unlimited device connections.
• No-log policy.
• 24/7 customer support.
• SugarSync encrypted storage.
• Pricing:
• $11.99/month (monthly plan).
• $3.99/month (1-year plan).
• Supported Platforms:
• Windows, macOS, iOS, Android, Linux, routers, Smart TVs.

• Key Features:
• Free plan with 10GB/month.
• 110+ server locations in 60+ countries.
• Built-in ad and tracker blocker.
• Config generator for custom VPN setups.
• No-log policy.
• Pricing:
• Free plan available.
• $9.00/month (monthly plan).
• $5.75/month (1-year plan).
• Supported Platforms:
• Windows, macOS, iOS, Android, Linux, browsers, routers.

   chmod +x my_first_script.sh

Execute the script by typing:

   import React from 'react';
   import ReactDOM from 'react-dom/client';

   function App() {
       return (
           <div>
               <h1>Hello, React in Laravel with Vite!</h1>
           </div>
       );
   }

   const rootElement = document.getElementById('app');
   if (rootElement) {
       const root = ReactDOM.createRoot(rootElement);
       root.render(<App />);
   }

Let’s create a React component that interacts with the Laravel API to display and manage posts.

Vite uses environment variables to manage different settings for development and production. Create .env files to store these variables:

   VITE_API_URL=http://localhost:8000/api

You can set a stop-loss order when opening a position or on an existing position:

   def place_stop_loss(symbol, side, qty, stop_price):
       response = session.place_active_order(
           symbol=symbol,
           side=side,
           order_type='Market',
           qty=qty,
           stop_loss=stop_price,
           time_in_force='GoodTillCancel'
       )
       if response['ret_code'] == 0:
           print(f"Stop-loss set at {stop_price} for {symbol}")
       else:
           print(f"Error setting stop-loss: {response['ret_msg']}")
       return response

   place_stop_loss('BTCUSD', 'Buy', 0.01, 29000)  # Buy 0.01 BTC with stop-loss at $29,000

   try:
       latest_price = get_latest_price('BTCUSD')
       print(f"Latest BTC/USD price: {latest_price}")
   except Exception as e:
       print(f"An error occurred: {e}")

This simple try-except block catches any errors that might occur during the API call and prints a message.