Precompile: 0x09 blake2f

[ChihChengLiang]

No description provided.

[Brechtpd]

We can take this one (should be fairly similar to sha256) if nobody else is working on it already.

[CPerezz]

I'm happy that you take it @Brechtpd ! But please, let's try to re-use the CellManager of keccak-multi or the one of the EVM instead of creating an extra one. As the plan is to merge all them in future PRs

[ed255]

@Brechtpd did you work on this / are you working on this? Not to put any pressure! It's just to figure out if this task should be unassigned :)

[CPerezz]

I think MatterLabs has an implementation of this that is pretty optimized.
We could take a look and see if we can reuse some stuff from there giving credit OFC.

[Brechtpd]

We have a blake2f circuit here: taikoxyz/zkevm-circuits#56. But it will likely require some changes and some extra work to make it usable in a precompile. It's unlikely we're going to spend more time on this on our end, so unassigning makes sense I think.