Sourced from hardhat's releases.

Hardhat v2.1.2

This release makes it easier to use a custom VM with hardhat. Most users shouldn't be affected by this change.

This release also fixes an issue with mainnet forking when using ArchiveNode.io as the remote node.

hardhat-etherscan v2.1.1

This release includes some improvements to the hardhat-etherscan plugin.

Ambiguous contracts

The plugin tries to automatically detect the contract that is being verified, but sometimes you can have two different contracts that generate the same bytecode. In previous versions this meant that you couldn't verify those contracts without modifying one of them. Now you can use the --contract parameter to specify which of the ambiguous contracts should be used.

Undetectable libraries

The plugin also tries to detect which libraries are linked to the contract that is being verified, but there are some edge cases where this is not possible (for example, if a library is only used in the constructor). Now you can use the --libraries parameter to pass these undetectable libraries. Learn more here.

Binance Smart Chain

We added support for BSC and its testnet. Huge thanks to @​purperen and @​guagualvcha who contributed to this.

Hardhat v2.1.1

This release fixes a bug introduced in 2.1.0 that was causing the gas estimation to be executed in the context of the latest block and not in the pending ("next") block.

hardhat-etherscan v2.1.0

This release includes a frequently requested feature for this plugin: to minimize the number of source files that are sent to Etherscan for verification.

Now hardhat-etherscan will do its best to only send the file of the contract and its dependencies. It is possible (but unlikely) that this produces a different bytecode than when the whole project is compiled; if that happens, the plugin will detect it and all the files in the project will be used.

Thanks to @​kartojal for doing the first steps towards this!

Hardhat v2.1.0

This release adds mempool support to Hardhat, with two possible mechanisms for mining transactions: automining (the current behavior) and interval mining. You can also disable both mechanisms and mine new blocks programmatically. Check the docs to learn more.

Besides that:

• Starting now, Hardhat will warn you if you are using an unsupported version of solc. This doesn't mean that you can't use those versions, only that some Hardhat features, like stack traces, might not work correctly.
• Ropsten forking now has cache support, if you fork from a block that is at least 100 blocks old.
• A bug around the eth_getStorageAt was fixed (thanks @​fubhy!)

• aadd6c0 Bump hardhat-core to 2.1.2
• 43d7f0a Merge pull request #1327 from nomiclabs/sort-batched-responses-by-id
• 47882f5 Merge pull request #1342 from nomiclabs/add-empty-prettierrc
• fe13e03 Add empty .prettierrc
• 949b8f0 Merge pull request #1333 from nomiclabs/add-issue-template
• 96a644f Update issue template
• 579d44a Merge pull request #1309 from liamzebedee/fix-mixHash-padding
• 5a235f6 Merge pull request #1284 from nomiclabs/fix-hre-injection
• a27d67d Add ISSUE_TEMPLATE
• 51ca15a Sort batched responses by id
• Additional commits viewable in compare view

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