Hardhat utils: constants zero hash

[ChristopherDedominici]

Related to design doc https://app.notion.com/p/nomicfoundation/Design-doc-Hardhat-utils-36d578cdeaf5808f88f8eabad82feb01 and https://app.notion.com/p/nomicfoundation/36d578cdeaf580cab1ebc113ff7b89db?v=36d578cdeaf581efada5000c7c5683c7

Implements:

pnpm hardhat utils constants zero-hash: 32 bytes = 0x + 64 zeros.

[changeset-bot]

⚠️ No Changeset found

Latest commit: f1c20c4

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[Copilot]

Pull request overview

Adds a new constants zero-hash util command to the internal hhu built-in plugin, exposing it via both hardhat utils constants zero-hash and the hhu CLI surface, and updates the CLI help snapshots and release notes accordingly.

Changes:

• Added a constants zero-hash task that prints the 32-byte zero hash (0x + 64 zeros).
• Added an integrated-task test that runs hre.tasks.getTask(["utils","constants","zero-hash"]) and asserts the printed output.
• Updated hhu CLI help snapshot text and added a changeset for a patch release.

Suggested manual testing:

• pnpm build
• node packages/hardhat/dist/src/hhu.js constants zero-hash

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
packages/hardhat/test/internal/cli/hhu.ts	Updates hhu help-output snapshots to list constants zero-hash.
packages/hardhat/test/internal/builtin-plugins/hhu/tasks/constants/zero-hash.ts	Adds an integration test for the hardhat utils constants zero-hash path.
packages/hardhat/src/internal/builtin-plugins/hhu/tasks/constants/zero-hash.ts	Implements the zero-hash task action that prints the zero hash.
packages/hardhat/src/internal/builtin-plugins/hhu/tasks/constants/index.ts	Registers the new zero-hash task in the constants namespace.
.changeset/sunny-cloths-search.md	Declares a hardhat patch changeset for the new util.

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[Copilot]

Pull request overview

Copilot reviewed 5 out of 5 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.

[Copilot]

Pull request overview

Copilot reviewed 4 out of 4 changed files in this pull request and generated no new comments.