How to add vector fields in the block header?

Question

I want to add a vector fields in the block header of substrate chain. Is this possible? If yes, How can i do that? Do we have any reference code for it?

Thanks in advance

Answer 1

I think you can push something to the header's digest field.

Utilize DigestItem::Other that takes a Vec<u8> as input.

But I don't recommend puting a very large Vec<u8> into the header.

https://paritytech.github.io/polkadot-sdk/master/sp_runtime/generic/enum.DigestItem.html