Hardhat is an Ethereum development environment for professionals. It facilitates performing frequent tasks, such as running tests, automatically checking code for mistakes or interacting with smart contracts.

Built by the Nomic Foundation for the Ethereum community.

💡 This is the README for Hardhat 3, the new major version of Hardhat. For the previous version (v2), see this branch instead.

Getting started

To install Hardhat and initialize a new project, run the following command in an empty directory:

npx hardhat --init

This will take you through an interactive setup process to get started.

Learn more

To learn more about Hardhat, check out the documentation.

Contributing

Contributions are always welcome! Feel free to open any issue or send a pull request.

Go to CONTRIBUTING.md to learn about how to set up Hardhat's development environment.

@nomicfoundation/hardhat-viem

3.0.0

Major Changes

• 29cc141: First release of Hardhat 3!

2.1.1

Patch Changes

• bdba581: Fixed "Multiple networks with chain id found" error when multiple chains share the same chain id (#7065)

2.1.0

Minor Changes

• 14b3042: Updated the minimal supported version of Node to v20 (#6982)

2.0.6

Patch Changes

• 90bcfda: Remove unnecessary peerDependency

2.0.5

Patch Changes

• 6010386: Moved types to HardhatViemHelpers and initialized ContractTypesMap as empty for better extensibility. Improved performance by disabling retries in dev nets (thanks @TateB!)

2.0.4

Patch Changes

• efa905d: Fix for corrupted Hardhat peer dependency version from pnpm.

2.0.3

Patch Changes

• a8a6038: Added ContractTypesMap to simplify contract type imports (thanks @beepidibop!)

2.0.2

Patch Changes

• ccb0ace: Added support for library linking (thanks @Chlebamaticon!)

2.0.1

Patch Changes

• a181462: Fix to add guard for updated TransactionReceipt type in viem

2.0.0

Major Changes

• e4b1c07b7: Upgraded hardhat-viem to support viem@2

1.0.4

Patch Changes

• 29516eb: Fixed broken link in network error message (thanks @sunsetlover36!).

1.0.3

Patch Changes

• ffb301f14: Improved loading performance

1.0.2

Patch Changes

• b521c2a05: Add configurable public client to getContractAt, deployContract and sendDeploymentTransaction

1.0.1

Patch Changes

• 4943519d0: Fixed an issue with development networks using custom chain ids