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Hardhat’s network forking lets you spin up a local Ethereum node that mirrors Mainnet state at a specific block. Learn how to start a fork, impersonate accounts, test against real contracts, and handle the main trade‑offs.
Architect a trust-aware, read-only Ethereum data layer using web3.js. Learn to implement RPC providers, chain verification, and error handling for efficient state retrieval.
Learn how to use Hardhat's mainnet forking to test smart contracts against real-world state and impersonate accounts without private keys.
A step‑by‑step guide to migrate Solidity contracts from revert strings to custom errors, covering declaration, replacement, ABI updates, testing, and gas verification.
Real‑time Ethereum event listening with web3.js is faster than polling. Learn how to set up a WebSocket subscription, filter events, handle reconnections, and decide when polling is a better fit.
Learn how to prevent reentrancy attacks in Solidity using the Checks-Effects-Interactions (CEI) pattern to ensure contract state is updated before external calls.
Learn how to handle asynchronous smart contract interactions in Web3.js, distinguishing between .call() and .send(), and implementing event listeners to keep your UI in sync with the blockchain.
An architecture note covering Hardhat's network forking: requirements, minimal design, trust boundaries, operational checks, failure modes, and triggers for redesign.
Learn how to choose between Remote and Injected providers in web3.js to balance fast data loading with secure transaction signing using a hybrid architecture.
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