Pin a Fork Block in Hardhat to Make Mainnet Tests Reproducible
Fork mainnet at a fixed block and cache state locally to get deterministic integration tests against real deployed contracts without spending gas.
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hardhatFrom Raw JSON-RPC to Typed Calls: Using the Web3.js Contract Abstraction Well
The web3.eth.Contract class turns raw JSON-RPC encoding into typed method calls — but only if you understand the call() vs send() split, gas estimation limits, and 1.x vs 4.x differences.
web3jsReal‑Time Event Listening with Web3.js eth.subscribe
Learn how to listen to smart contract events in real time using Web3.js eth.subscribe, handle reconnections, and weigh the trade‑offs of persistent WebSocket connections.
Web3.js Event Handling: Polling vs. WebSockets for Reliable Data
Choosing between polling and WebSockets in Web3.js involves a trade-off between latency and reliability. Learn why a hybrid approach is the industry standard for production-grade event handling.
Consuming Ethereum Contract Events with web3.js 4.x: Subscriptions vs Polling, and Where the Trust Boundary Sits
An architecture note on consuming Ethereum contract events with web3.js 4.x: why checkpointed getLogs polling beats naive subscriptions, how reorgs and the RPC trust boundary shape the design, and when to move to an indexer.
Efficiently Filtering Contract Events with Web3.js v1.x
Learn how to use Web3.js event subscriptions with indexed filters to listen only to the blockchain events you need, reducing node load and enabling real‑time updates.
Sending Web3.js Contract Calls with Automatic Gas Estimation: A Practical Guide
Learn how to use web3.js to send a contract transaction with automatic gas estimation, including code, pitfalls, and verification steps.
Reading Contract State and Events with web3.js: call vs send vs getPastEvents
A practical web3.js guide to choosing between .call(), .send(), and getPastEvents — with version caveats, gas estimation, bounded log queries, and polling vs WebSocket trade-offs.
Web3.js Contracts: Call vs. Send and the 1.x to 4.x Migration Shift
Understanding web3.eth.Contract: when to use .call() vs .send(), how to handle event logs with chunked queries, and the breaking changes from web3.js 1.x to 4.x.