塞爾根·烏伊薩爾
All authorsSergen is a Senior Technical Writer at Quicknode, where he covers blockchain developer tools, APIs, and data infrastructure across multiple networks, helping developers go from zero to production with hands-on guides and sample apps.
Recent guides
Why eth_signTransaction fails on hosted nodes, and how to sign transactions locally with Viem or ethers.js and broadcast with eth_sendRawTransaction.
Deploy a Hyperliquid Mainnet non-validating node with Docker Compose and Quicknode Peering. Verify full block and raw mempool output, then set retention.
Use the Quicknode CLI to run RPC calls with account-based access or supported stablecoin payments, verify endpoints, automate preflights, and give agents scoped access.
Learn Hyperliquid L1, L2, L3, and L4 order book data with Quicknode gRPC examples, including aggregated depth, individual orders, and wallet attribution.
Build a Robinhood Chain monitoring workflow with Quicknode Streams to detect Stock Token transfers and Uniswap swap activity in real time.
了解如何透過Quicknode 和 viem，在Robinhood 上讀取股票代幣（TSLA、AAPL、NVDA、AMZN）的資料：代幣元資料、總供應量、餘額及轉帳紀錄。
Learn how to stream live stop-loss and take-profit trigger orders on Hyperliquid using Quicknode's gRPC API. Monitor resting TP/SL orders per block in TypeScript.
Discover, fund, trade, and stream Hyperliquid HIP-4 binary outcome markets using Quicknode's zero-custody REST builder API for Hyperliquid.
Build a terminal-based Sui portfolio tracker that fetches balances and transactions with GraphQL and streams live checkpoints via gRPC using Quicknode.
Recent sample apps
Aave V3 清算追蹤器
Monitor and analyze liquidation events on the Aave V3 protocol in real-time. This project demonstrates the power of serverless blockchain data streaming using Quicknode's Streams.
由人工智慧驅動的 DeFi 收益優化器
本應用程式將教您如何將 Aerodrome Swap API 與 AI 模型整合，為 Aerodrome 打造個人化的 DeFi 收益優化工具及分析儀表板。
符合反洗錢（AML）及打擊資助恐怖主義（CFT）規範的去中心化應用程式（dApp）
The AML and CFT Compliant dApp enables secure ETH staking with integrated compliance features. Built on Base and compatible with any Ethereum-based network, it leverages Chainlink Functions and Quicknode's Risk Assessment API to ensure only low-risk wallets can participate in the staking pool.
Bitcoin Transaction Report Application
The Bitcoin Transaction Report app uses Quicknode's Blockbook API to query the Bitcoin blockchain, filter transaction data, calculate key metrics, and display the results.
Ethereum 報告應用程式
The Ethereum Transaction Report app fetches and analyzes Ethereum transactions for a given address using Quicknode's Blockbook API, providing detailed reports within a specified date range
EVM MCP 伺服器
EVM MCP 伺服器將Claude Cursor 等 AI 助理與Ethereum EVM 相容鏈上的區塊鏈資料相連。透過這款 MCP 伺服器Claude 能藉由自然對話Claude 錢包餘額、分析合約並監控 gas 費，使 AIagents能夠存取加密貨幣資料。