Sourced from hardhat's releases.

Hardhat v2.7.0

This release adds a FIFO mode to Hardhat Network's mempool and makes the coinbase address customizable. It also includes some minor bug fixes and improvements.

Mempool modes

The way Hardhat Network's mempool orders transactions is now customizable. By default, they are prioritized following Geth's rules, but you can enable a FIFO (first in, first out) mode instead. This mode ensures that transactions are added to blocks in the same order they are sent, and it's useful to recreate blocks from other networks.

You can enable the FIFO mode in your config with:

networks: {
  hardhat: {
    mining: {
      auto: false,
      mempool: {
        order: "fifo",
      },
    },
  },
}

Huge thanks to @​ngotchac for this contribution!

Customizable coinbase address

You can configure the coinbase address via a config field and a new RPC method. This is the address that will receive the block reward when a new block is mined.

The config field is part of the Hardhat Network configuration:

networks: {
  hardhat: {
    coinbase: "0x590c193534A11590b1BcE02896d2805bAC54Da2C"
  },
},

You can also use the new hardhat_setCoinbase RPC method to change the coinbase address in runtime:

await network.provider.send("hardhat_setCoinbase", [
  "0x590c193534A11590b1BcE02896d2805bAC54Da2C",
]);

Other changes

• Suggest similar artifact names when a given name is not found
• Fixed how the cumulative gas is computed for receipts and added a missing field (Thanks @​ngotchac!)

... (truncated)

• 2ea8768 Version Packages
• 82f9da9 Merge pull request #2090 from nomiclabs/configurable-coinbase
• 598ea55 Update packages/hardhat-core/test/internal/hardhat-network/provider/modules/e...
• 554fdb5 Resize it once again
• c832e2a Resize plugin badge
• b7577c5 Merge pull request #2078 from nomiclabs/clean-hh-node-test-cache
• 6c76e8d Merge pull request #2046 from x0s0l/patch-1
• 0778c4e Merge pull request #2075 from nomiclabs/update-plugin-badge
• d2d3473 Add changeset
• 52be132 Implement hardhat_setCoinbase
• Additional commits viewable in compare view

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