How to use castVoteBySig and delegateBySig function in Governor

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Dear OpenZeppelin team,

I'm trying to build my DAO using Governor document, when I see 2 function castVoteBySig and delegateBySig I have a wonder:

With these two functions, it seems to be possible to build a gas-free governor application which means maybe the service provider pays all necessary gases. Would it be possible? Is this feature in development? Because I don't seem to find any useful information in the Doc or in the introduction video.

Thank you in advance.

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Yes!

This is supported at the contract level. We do not however provide offchain tolling/UI to do that. You'd have to come up with your own interface that gets user to produce the signatures, and relay them (with all the DOS protection needed)

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