[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"academy-blogs-en-1-1-all-golang-ep98-websocket-blockchain-realtime-all--*":3,"academy-blog-translations-fmt9xabjpe7a889":79},{"data":4,"page":67,"perPage":67,"totalItems":67,"totalPages":67},[5],{"alt":6,"collectionId":7,"collectionName":8,"content":9,"cover_image":10,"cover_image_path":11,"created":12,"created_by":13,"expand":14,"id":73,"keywords":74,"locale":49,"published_at":75,"scheduled_at":13,"school_blog":71,"short_description":76,"slug":77,"status":69,"title":6,"updated":78,"updated_by":13,"views":72},"EP.98 Using WebSocket with Blockchain for Real-time Data Streaming","sclblg987654321","school_blog_translations","\u003Cp>In developing applications that need to track blockchain transactions or events — such as wallets, exchanges, NFT marketplaces, or real-time dashboards — the speed and accuracy of real-time updates is critical.\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Cp>Using WebSocket allows us to listen to blockchain events instantly, without repetitive polling or querying databases. This greatly reduces latency and improves data accuracy.\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Ch2>1. Why Use WebSocket with Blockchain?\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>✅ Most blockchains do not offer native push mechanisms\u003Cbr>✅ WebSocket allows clients to \"subscribe\" to new events instantly\u003Cbr>✅ Reduces the load of repeated queries and improves response latency\u003Cbr>✅ Ideal for real-time systems like dApps, wallets, exchanges, and live analytics\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Ch2>2. Connecting to Blockchain Node via WebSocket\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>Popular blockchains like Ethereum, Solana, and Bitcoin support WebSocket RPC, enabling real-time subscriptions to:\u003C\u002Fp>\u003Cul>\u003Cli>New blocks\u003C\u002Fli>\u003Cli>Pending transactions\u003C\u002Fli>\u003Cli>Smart contract logs\u002Fevents\u003C\u002Fli>\u003C\u002Ful>\u003Cp> \u003C\u002Fp>\u003Cp>🔧 Sample Go code to connect to Ethereum WebSocket RPC:\u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext language-go\">package main\n\nimport (\n    \"context\"\n    \"fmt\"\n    \"log\"\n\n    \"github.com\u002Fethereum\u002Fgo-ethereum\"\n    \"github.com\u002Fethereum\u002Fgo-ethereum\u002Fethclient\"\n)\n\nfunc main() {\n    client, err := ethclient.Dial(\"wss:\u002F\u002Fmainnet.infura.io\u002Fws\u002Fv3\u002FYOUR_PROJECT_ID\")\n    if err != nil {\n        log.Fatal(err)\n    }\n\n    query := ethereum.FilterQuery{}\n    logs := make(chan ethereum.Log)\n\n    sub, err := client.SubscribeFilterLogs(context.Background(), query, logs)\n    if err != nil {\n        log.Fatal(err)\n    }\n\n    fmt.Println(\"Subscribed to blockchain events\")\n\n    for {\n        select {\n        case err := <-sub.Err():\n            log.Println(\"Subscription error:\", err)\n        case vLog := <-logs:\n            fmt.Println(\"New event:\", vLog)\n        }\n    }\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Ch2>3. Broadcasting Events to Clients in Real-time\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>Once your backend receives an event from the blockchain, you can broadcast it to all connected clients via WebSocket.\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Cp>✅ Separate rooms\u002Ftopics by event type or address\u003Cbr>✅ Use goroutines to ensure non-blocking delivery to each client\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Cpre>\u003Ccode class=\"language-plaintext language-go\">for event := range blockchainEvents {\n    for client := range clients {\n        client.WriteJSON(event)\n    }\n}\n\u003C\u002Fcode>\u003C\u002Fpre>\u003Cp> \u003C\u002Fp>\u003Ch2>4. Security Considerations\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>🔒 When allowing external clients to connect to your WebSocket server, apply the following:\u003C\u002Fp>\u003Cp>✅ Authenticate all clients via API key or JWT before allowing subscriptions\u003Cbr>✅ Use TLS (wss:\u002F\u002F) to encrypt communication\u003Cbr>✅ Apply rate-limiting and possibly CAPTCHA to prevent spam\u002Fflooding\u003Cbr>✅ Log all subscription requests for auditing and tracing\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Ch2>5. Best Practices\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>🛠️ To build a production-grade system:\u003C\u002Fp>\u003Cp>✅ Use buffered channels to queue event data\u003Cbr>✅ Separate WebSocket server and blockchain listener into different services\u003Cbr>✅ Monitor connection health and reconnect automatically\u003Cbr>✅ Use binary encoding or compression to reduce payload size\u003Cbr>✅ Load test with concurrent clients to validate scalability and latency\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Ch2>🎯 Challenge Before the Next EP\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>Want to try building it for real? Here’s your challenge:\u003C\u002Fp>\u003Cp>✅ Connect to Ethereum Mainnet via Infura WebSocket\u003Cbr>✅ Subscribe to smart contract log events\u003Cbr>✅ Broadcast them to all connected clients in real-time\u003Cbr>✅ Simulate 5–10 concurrent clients with logging enabled\u003Cbr>✅ Validate your server’s performance under non-blocking load\u003C\u002Fp>\u003Cp>🧪 Benchmark your system’s latency and stability — and gain a true understanding of what it takes to run a real-time blockchain service.\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Chr>\u003Cp> \u003C\u002Fp>\u003Ch2>🚀 Summary\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>WebSocket is the perfect fit for real-time communication with blockchains, especially for high-frequency on-chain events like:\u003C\u002Fp>\u003Cp>✅ New blocks\u003Cbr>✅ Smart contract events\u003Cbr>✅ Token transfers\u003Cbr>✅ Pending transactions\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Cp>With the right architecture, your WebSocket server can:\u003C\u002Fp>\u003Cul>\u003Cli>Receive blockchain data instantly\u003C\u002Fli>\u003Cli>Broadcast to thousands of clients accurately\u003C\u002Fli>\u003Cli>Scale securely with high performance\u003C\u002Fli>\u003C\u002Ful>\u003Cp> \u003C\u002Fp>\u003Ch2>🔜 Next EP (EP.99):\u003C\u002Fh2>\u003Cp> \u003C\u002Fp>\u003Cp>Building a WebSocket Server for High-Traffic Environments\u003Cbr>Learn how to architect a system that can handle thousands of concurrent connections — while maintaining stability, low latency, and reliability.\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Cp>Let’s move deeper into the world of real-time blockchain systems! 🌐⚡️\u003C\u002Fp>\u003Cp> \u003C\u002Fp>\u003Cp data-start=\"498\" data-end=\"834\">\u003Cstrong>Read more\u003C\u002Fstrong>\u003C\u002Fp>\u003Cul>\u003Cli>\u003Cp data-start=\"498\" data-end=\"834\">\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.superdev.school\u002Fblogs\u002Fcategories\u002FGolang\">\u003Cstrong>Golang The Series\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp data-start=\"498\" data-end=\"834\">\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.superdev.school\u002Fblogs\u002Fcategories\u002FJS2GO\">\u003Cstrong>JS2GO\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\u003C\u002Fli>\u003Cli>\u003Cp data-start=\"498\" data-end=\"834\">\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.superdev.school\u002Fen\u002Fblogs\u002Fcategories\u002FTailwind%20CSS\">\u003Cstrong>10 Eps That Will Make You a Pro Tailwind CSS Overnight\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\u003C\u002Fli>\u003C\u002Ful>\u003Cp>\u003Cstrong>🔵 Facebook: \u003C\u002Fstrong>\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.facebook.com\u002Fsuperdev.academy.th\">\u003Cstrong>Superdev Academy\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\u003Cp>\u003Cstrong>🔴 YouTube: \u003C\u002Fstrong>\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.youtube.com\u002Fchannel\u002FUC2eI2RxcA2zbTqZyHyWIfRg\">\u003Cstrong>Superdev Academy\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\u003Cp>\u003Cstrong>📸 Instagram: \u003C\u002Fstrong>\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.instagram.com\u002Fsuperdevschool\u002F\">\u003Cstrong>Superdev Academy\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\u003Cp>\u003Cstrong>🎬 TikTok: \u003C\u002Fstrong>\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.tiktok.com\u002F@superdevacademy?lang=th-TH\">\u003Cstrong>https:\u002F\u002Fwww.tiktok.com\u002F@superdevacademy?lang=th-TH\u003C\u002Fstrong>\u003C\u002Fa>\u003C\u002Fp>\u003Cp>\u003Cstrong>🌐 Website: \u003C\u002Fstrong>\u003Ca target=\"_blank\" rel=\"noopener noreferrer\" href=\"https:\u002F\u002Fwww.superdevacademy.com\u002Fen\">\u003Cstrong>https:\u002F\u002Fwww.superdevacademy.com\u002Fen\u003C\u002Fstrong>\u003C\u002Fa>\u003Cstrong> \u003C\u002Fstrong>\u003C\u002Fp>","168_11zon_2egqvmza5q.webp","https:\u002F\u002Ftwsme-r2.tumwebsme.com\u002Fsclblg987654321\u002Fgvcc4flmpvdsz4k\u002F168_11zon_2egqvmza5q.webp","2026-03-04 08:46:12.607Z","",{"keywords":15,"locale":43,"school_blog":53},[16,23,28,33,38],{"collectionId":17,"collectionName":18,"created":19,"created_by":13,"id":20,"name":21,"updated":22,"updated_by":13},"sclkey987654321","school_keywords","2026-03-04 08:44:48.724Z","s6xhnfomy7n5ycp","WebSocket Server","2026-04-10 16:12:50.171Z",{"collectionId":17,"collectionName":18,"created":24,"created_by":13,"id":25,"name":26,"updated":27,"updated_by":13},"2026-03-04 08:46:11.716Z","fc5pkxs5v68yyg8","Real-time Transactions","2026-04-10 16:13:09.844Z",{"collectionId":17,"collectionName":18,"created":29,"created_by":13,"id":30,"name":31,"updated":32,"updated_by":13},"2026-03-04 08:35:04.143Z","6mkcjvgudbs88c9","Blockchain","2026-04-10 16:12:36.466Z",{"collectionId":17,"collectionName":18,"created":34,"created_by":13,"id":35,"name":36,"updated":37,"updated_by":13},"2026-03-04 08:34:00.920Z","ecac9y661or1xka","WebSocket","2026-04-10 16:08:05.227Z",{"collectionId":17,"collectionName":18,"created":39,"created_by":13,"id":40,"name":41,"updated":42,"updated_by":13},"2026-03-04 08:20:14.253Z","ah6lvy4x8qe08l5","Golang","2026-04-10 16:07:26.172Z",{"code":44,"collectionId":45,"collectionName":46,"created":47,"flag":48,"id":49,"is_default":50,"label":51,"updated":52},"en","pbc_1989393366","locales","2026-01-22 11:00:02.726Z","twemoji:flag-united-states","qv9c1llfov2d88z",false,"English","2026-04-10 15:42:46.825Z",{"category":54,"collectionId":55,"collectionName":56,"expand":57,"id":71,"views":72},"wqxt7ag2gn7xcmk","pbc_2105096300","school_blogs",{"category":58},{"blogIds":59,"collectionId":60,"collectionName":61,"created":62,"created_by":13,"id":54,"image":63,"image_alt":13,"image_path":64,"label":65,"name":66,"priority":67,"publish_at":68,"scheduled_at":13,"status":69,"updated":70,"updated_by":13},[],"sclcatblg987654321","school_category_blogs","2026-03-04 08:33:53.210Z","59ty92ns80w_15oc1implw.png","https:\u002F\u002Ftwsme-r2.tumwebsme.com\u002Fsclcatblg987654321\u002Fwqxt7ag2gn7xcmk\u002F59ty92ns80w_15oc1implw.png",{"en":66,"th":66},"Golang The Series",1,"2026-03-16 04:39:38.440Z","published","2026-04-25 02:32:15.470Z","fmt9xabjpe7a889",202,"gvcc4flmpvdsz4k",[20,25,30,35,40],"2025-10-07 10:26:05.239Z","Learn how to use WebSocket to connect with Blockchain nodes like Ethereum to stream transactions and smart contract events in real-time. Includes best practices for security and performance.","golang-ep98-websocket-blockchain-realtime","2026-04-25 02:48:01.437Z",{"en":77}]