塞尔根·乌伊萨尔
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.
Learn how to read Stock Token data (TSLA, AAPL, NVDA, AMZN) on Robinhood Chain using Quicknode RPC and viem: token metadata, total supply, balances, and Transfer history.
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 清算追踪器
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.
基于人工智能的DeFi收益优化器
本应用将指导您如何将 Aerodrome Swap API 与 AI 模型集成，从而为 Aerodrome 创建一个个性化的 DeFi 收益优化器和分析仪表盘。
符合反洗钱（AML）和反恐怖主义融资（CFT）要求的去中心化应用（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 报告应用程序
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 报告应用程序
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 服务器
EVM MCP 服务器将Claude Cursor 等 AI 助手与Ethereum EVM 兼容链上的区块链数据连接起来。借助这款 MCP 服务器工具Claude 能够通过自然对话Claude 钱包余额、分析智能合约并监控 gas 费用，从而使 AIagents能够访问加密货币数据。