feat: add ERC7572 interface for contracts that expose contract level metadata

[coffeexcoin]

This PR introduces the interface for draft ERC-7572 to the set of interfaces in the package.

This interface is useful for contracts (particularly tokens) that wish to expose a set of metadata for the contract including icon, banner image, description, external url, etc.

PR Checklist

• Tests (No tests are necessary as this is purely an interface spec)
• Documentation (Natspec documentation is applied to the added interface)
• Changeset entry (run npx changeset add)

[changeset-bot]

🦋 Changeset detected

Latest commit: dc731cd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
openzeppelin-solidity	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[ernestognw]

Hi @coffeexcoin,

If I remember correctly, this interface was discussed in the context of #5394. I think we would need to use the interface in 6909 if we approve this PR

[coffeexcoin]

Hi @coffeexcoin,

If I remember correctly, this interface was discussed in the context of #5394. I think we would need to use the interface in 6909 if we approve this PR

Happy to make those changes - what would be the preferred method, just make 6909ContentURI implement this interface?

[coffeexcoin]

Also happy to add erc20/721/1155 extensions that implement this if that would be desirable

[ernestognw]

I'd keep it only for 6909 for now. Other standards like ERC721 and ERC1155 define their own metadata functions. Probably that's why we decided not to include this interface in the first place

cc @arr00

[arr00]

@ernestognw do you think it's ok to add an event to an interface defined in an ERC? ERC6909 doesn't define the ContractURIUpdated event. I think it should (maybe we should open a PR), but we shouldn't add it unilaterally.

[Amxx]

ERC-6909 specifications does not mention ERC-7572 (that is still draft). IMO that change is not desirable.