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Diagnose stuck Polygon PoS Bridge withdrawals by checking checkpoint finalization, gas prices, pause status, and exit parameters. Follow this step-by-step guide to identify the root cause and take appropriate action.
Learn how to use web3.js’ <code>pastEvents</code> with block‑range pagination to fetch all ERC‑20 Transfer logs reliably. A step‑by‑step guide, example code, trade‑offs, and best practices for Goerli USDC events.
Decide when to use HTTPProvider or WebsocketProvider in Web3.js v4: compare latency, resource use, and reconnection logic, then see a concrete implementation and validation steps.
Learn how to configure Hardhat Network to fork Ethereum mainnet, run tests against real contract state, and avoid common pitfalls.
Bridge stalls at "waiting for relayer"? This diagnostic guide walks through the root causes, step‑by‑step checks, and fixes for Polygon PoS Bridge connectivity issues between Ethereum and Polygon, plus when to raise an escalation.
Stop relying on mocks for external contracts. Learn how to use Hardhat Network Forking to clone mainnet state for deterministic, realistic integration testing.
Learn how to implement Mainnet Forking in Hardhat to test smart contracts against real-world blockchain state without risking production funds.
Vyper's @nonreentrant decorator adds a storage-backed lock to prevent reentrancy, but only for functions sharing the same key. Learn how to apply it correctly alongside checks-effects-interactions, what it costs, and how to verify it on a pinned compiler.
Forking lets you run integration tests against a pinned copy of mainnet state. This guide covers configuration, impersonation, archive requirements, and how to avoid flaky tests.
polygon
web3js
hardhat
vyper