Hardhat 3 is here: what's new and why you should use it
summary
Hardhat 3 is production-ready beta that adds Solidity Tests for fast on-EVM unit checks, explicit multi-network connections with L2-aware chainType typing, and ECMAScript module config plus plugin API changes. The node simulator EDR is rewritten in Rust and yields up to 10x speed on JS/TS suites; Solidity tests match Foundry performance. Ignition provides declarative, restartable deployments (create2 support, journaling), code coverage and gas stats move into core, and migrations are typically days, not weeks.
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chapters (14)
- 0:00Hardhat 3 intro
- 3:13Why Hardhat 3 needed
- 5:00Solidity testing & EDR perf
- 7:28Multi-chain & L2 sim
- 10:16Ignition deployment
- 12:07Built-in features & plugins
- 14:35Production tips & migration
- 16:01Migrate to Hardhat 3
- 19:53Future roadmap
- 22:00Summary & call to action
- 22:42Q&A: mocking bridges
- 23:44Q&A: VM vs Ethers
- 24:47Q&A: custom factories
- 25:49Q&A: ERC-4337 support
